CDMA1X BSS Network Planning Parameter Configuration...
Transcript of CDMA1X BSS Network Planning Parameter Configuration...
Document No. Product name CBSCV100R003C03
Applicable for Customer Product name
Drafted by Document version V1. 2
CDMA1X BSS Network Planning Parameter Configuration Guide
Prepared by: Network planning Dept. Date: August, 2004
Reviewed by: Network planning Dept. Date: August,2004
Reviewed by: Date:
Approved by: Date:
Huawei Technologies Co., Ltd. All rights reserved
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Table of Contents 1. FORWARD.................................................................................................................................................. 7
1.1 ABOUT THIS DOCUMENT...................................................................................................................... 7 1.2 TABLE OF PARAMETERS RELATED TO NETWORK PLANNING............................................................ 8
2. FORWARD POWER ALLOCATION PARAMETERS ................................................................... 10 2.1 SECTOR CARRIER PARAMETERS (PILOT) ........................................................................................ 10 2.2 PILOT CHANNEL PARAMETERS (PILOT_CH)................................................................................... 12 2.2 SYNC CHANNEL PARAMETERS (SYNC_CH) .................................................................................... 13 2.3 PAGING CHANNEL PARAMETERS (P_CH) ......................................................................................... 14 2.4 QUICK PAGING CHANNEL PARAMETERS (QP_CH) ......................................................................... 15
3. RECOMMENDATIONS FOR POWER CONTROL PARAMETER CONFIGURATION....... 19 3.1 DESCRIPTIONS OF SPECIAL REPRESENTATION................................................................................ 19
3.1.1 Reverse Outloop Set Value................................................................................................... 19 3.1.2 Forward Channel Transmit Power ...................................................................................... 20 3.1.3 Eb/Nt Set Value of Forward Fast Power Control ............................................................. 21 3.1.4 Representation of FER........................................................................................................... 21
3.2 BSC-LEVEL POWER CONTROL PARAMETERS (BSCPWR) ............................................................ 21 3.3 REVERSE CLOSED LOOP POWER CONTROL PARAMETERS (RCLPC) ........................................... 26 3.4 FORWARD SLOW POWER CONTROL PARAMETERS (FSLOWPC)................................................... 45 3.5 FORWARD EIB POWER CONTROL PARAMETERS (FEIBPC) .......................................................... 55 3.6 FORWARD FAST POWER CONTROL PARAMETERS (FFASTPC)...................................................... 59 3.7 TARGET FER (FER) ........................................................................................................................... 79
4. HANDOFF PARAMETERS .................................................................................................................. 85 4.1 MODULE HANDOFF PARAMETER (MHOPARA) .............................................................................. 85 4.2 HANDOFF PARAMETERS (HOPARA) ................................................................................................ 94 4.3 PILOT HANDOFF ALGORITHM SWITCH PARAMETERS (PHOALG) ............................................... 107 4.4 SAME-FREQUENCY HARD HO PARAMETERS (HHOSAMEFREQPARA) ................................. 110 4.5 CANDIDATE PILOT SEARCH CONTROL PARAMETERS (CFSCPARA)........................................... 113 4.6 MOBILE ASSISTED HARD HANDOFF PARAMETER (HHOMAHHOPARA) ................................. 121 4.7 HANDDOWN HARD HANDOFF PARAMETER (HHOHANDDOWNPARA)..................................... 125 4.8 DIRECT HARD HANDOFF PARAMETER (HHODIRECTPARA) .................................................... 127 4.9 PILOT BEACON HARD HANDOFF PARAMETERS (HHOPILOTBEACONPARA) ........................ 128 4.10 PILOT MEASUREMENT REQUEST PARAMETERS (PMROPARA) .................................................. 130
5. CHANNEL ASSIGNMENT .................................................................................................................... 133 5.1 CHANNEL INFORMATION (CH_INFO) ............................................................................................... 133 5.2 SCH ASSIGN PARAMETERS (SCH_PARA) .................................................................................... 143 5.3 CHM MODULE PARAMETERS (MCHM)............................................................................................ 159 5.4 SERVICE REDIRECTION PARAMETERS (SR_CFG) .......................................................................... 182
6. SYSTEM MESSAGES ........................................................................................................................... 187 6.1 SYNCHRONIZATION CHANNEL MESSAGE (SCHM) ............................................................................ 187 6.2 SYSTEM PARAMETERS MESSAGE (SPM) ............................................................................................ 190 6.3 SYSTEM MESSAGE CONTROL PARAMETERS (SYS_MSG_CTRL_INFO) ....................................... 203 6.4 ACCESS PARAMETER MESSAGE (APM) .............................................................................................. 207 6.5 ACCESS CHANNEL PARAMETERS (A_CH)........................................................................................... 221 6.6 EXTENDED SYSTEM PARAMETER MESSAGE (ESPM) ....................................................................... 223 6.7 NEIGHBOUR LIST MESSAGES (NLM) .................................................................................................. 237 6.8 GLOBAL SERVICE REDIRECTING MESSAGES (GSRDM) .................................................................. 238 6.9 EXTENDED CDMA CHANNEL LIST MESSAGES (CCLM) .................................................................. 242 6.10 EXTENDED GLOBAL SERVICE REDIRECTION MESSAGES (GSRDM)............................................ 244 6.11 GLOBAL NEIGHBOR LIST MESSAGE (GNLM) .................................................................................. 247
7. BTS CELL ATTRIBUTE PARAMETERS ........................................................................................... 251
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7.1 SET BTS REVERSE CHIP PROCESSING PARAMETERS (SET_BTSREVCHP) ........................... 252 7.2 SET BTS CELL PARAMETERS (SET_BTSCELLPARA) ............................................................... 256
8. LOAD CONTROL PARAMETERS ................................................................................................... 261 8.1 FORWARD LOAD CONTROL PARAMETERS (FWD_LOAD_CTRL_PARA) .................................. 261 8.2 REVERSE LOAD CONTROL PARAMETERS (REV_LOAD_CTRL_PARA) .................................... 269 8.3 ACCESS LOAD CONTROL PARAMETERS (ACH_LOAD_CTRL_PARA)....................................... 275 8.4 SERVICE RESOURCE MANAGEMENT PARAMETERS (BSCRSM).................................................. 278
9. TCP OPTIMIZATION PARAMETERS............................................................................................ 280
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Table of Table Descriptions
TABLE 2-2 QUICK PAGING CHANNEL POWER OFFSET ......................................................................................... 17 TABLE 3-1 TARGET FER ..................................................................................................................................... 21 TABLE 4-1 SEARCH WINDOW SIZE....................................................................................................................... 94 TABLE 4-2 HANDOFF REMOVAL TIMER EXPIRATIONS ........................................................................................ 100 TABLE 4-3 THE RELATION BETWEEN PARAMETER VALUE AND PERIOD............................................................. 120 TABLE 6-5 REDIRECTION ACCESS OVERLOAD LEVEL........................................................................................ 239 TABLE 6-6 REDIRECTION RECORD TYPES ......................................................................................................... 242 TABLE 6-9 SEARCH MODES ............................................................................................................................... 247 TABLE 7-3 MEANINGS OF VALUES OF THE PARAMETER.................................................................................... 261
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CDMA1X BSS Network Planning Parameter Configuration Guide
Keywords: cdma2000, BSS, radio resource management, forward channel power
distribution, power control algorithm, handoff algorithm parameter, channel
assignment, system message and BTS cell attribute parameter, load control
parameter, and TCP optimization parameter.
Abstract: This document gives an in-depth principle description of the relevant
parameters in cdma2000 network planning, suggestions on parameter
configurations, and advantages & disadvantages of different
configurations. It provides references for network optimization engineers
to make the best of these radio resource management algorithms to
optimize the network coverage, network capacity and performances of
traffic measurement indices. The specific parameters include forward
channel power distribution, power control algorithm, handoff algorithm,
channel assignment, system message and BTS cell attribute.
Abbreviations list: Abis interface between BTS and BSC
BTS Base Tranceiver System
BSC Base Station Controller
CDMA Code Division Muti Access
ECAM Extended Channel Assignment message
Ec/Io Pilot energy accumulated over one PN chip period (Ec)
to the total power spectral density
(Io) in the received bandwidth
Ec/Ior
EIB Erase Indication Bit
ESCAM Extended Supplemental Channel Assignment Message
FCH Fundamental Channel
FER Frame Error Ratio
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FMR Frame Processing Board
FW TFC Forward Traffic Channel
MS Mobile Station
NUM_RSCCH Number of Reverse Supplemental Code channel
OMU Operation Maintenance Unit
PMRM Power Measurement Report Message
RC Radio configuration
Rx Received Power
RV TFC Reverse Traffic Channel
SCH Supplemental Channel
SCCH Supplemental Code Channel
SPU Signal Processing Unit
SDU Selection/Distribution Unit
Tx Transmit Power
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[Announcement]:
This guide is used by Huawei customer of relevant products. The customer must
abide by non-disclosure agreement and illegal transfer and retransmission are
prohibited. Huawei reserves the copyrights.
1. Forward
1.1 About this Document In this guide, the corresponding BSC version is 100R003C03
The fields about parameters in this guide are shown below:
[Type] This field specifies the type of a parameter: An algorithm parameter or a Um
interface parameter. For a Um interface parameter, the system messages that
contains the parameter are also given.
[Range and unit] This field specifies the range of the parameter. The value range is closely
related to the data structure.
[Operating range] This field suggests the allowable adjustment range of the parameter in
practice. Modify the parameter within the above available range during the network
optimization.
[Recommended value] It is a commonly used value, but not always applicable in any case. In
combination with the practical requirement, refer to the description of “Setting
tradeoffs” to define the value of the parameter. If the default value is inconsistent
with recommended value in this guide, the recommended value prevails.
[Setting tradeoffs] This field means the effect that will be caused if the value of the parameter
increases or decreases on the basis of the recommended value.
This guide only provides references for parameter setting.
The representations and conversion methods between parameters related to
power control and forward power distribution are all listed in 3.1. The symbol Ec/Io is
the same as Ec/Io, so does for Eb/Nt and Eb/Nt.
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1.2 Table of Parameters Related to Network Planning
SN Type SQL table name Configuration items
Dynamic configuration
command
1 Sector carrier gain parameter
PILOT RF gain and sector gain MOD CDMACH
2 PILOT_CH Pilot Channel Gain MOD PLTCH 3 SYNC_CH Sync Channel Gain MOD SYNCH
4 P_CH Paging Channel Gain (configured according to paging channel No.) and Broadcast MODE
MOD PCH
5
Common channel
parameter
QP_CH
Number of Quick Paging Channels, Quick Paging Channel Rate, CCI Modulation Symbol Relative Power Level, and Relative Power
Level of PI Modulation Symbol
MOD QPCH
6 BSCPWR BSC-level power control parameters MOD BSCPWR
7 RCLPC Reverse Closed Loop Power Control Parameters
MOD RCLPC
8 FSLOWPC Forward Slow Power Control Parameters MOD FSLOWPC
9 FEIBPC Forward EIB Power Control Parameters MOD FEIBPC
10 FFASTPC Forward Fast Power Control Parameters MOD FFASTPC
11
Power control
FER Target (FER) Configuration MOD FER
12 MHOPARA Inter-BSC Handoff Parameters MOD BSCHO
13 HOPARA Handoff parameters MOD HO
14 PHOALG Pilot Handoff Algorithm Switch Parameters MOD PHOALG
15 CFSCPARA Candidate Pilot Search Control Parameters MOD CFSC
16
Handoff
HHOMAHHOPARA
Mobile Assisted HHO Parameters MOD HHOMA
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17 HHOHANDDOWNPARA
Handdown HHO Parameters MOD HNDDWN
18 HHODIRECTPARA Direct HHO Parameters MOD DRCT
19 HHOPILOTBEACONPARA
Pilot Beacon HHO Parameters MOD HHOBPLT
20 PMROPARA Pilot Measurement Request Parameters MOD PMRO
21 SFNBRPILOT Same Frequency HO Relation
ADD NBRCDMACH, RMV NBRCDMACH, LST NBRCDMACH , MOD SFNBRCDMACHP
22 DFNBRPILOT Different Frequency HO Relation
ADD NBRCDMACH, RMV NBRCDMACH, LST NBRCDMACH, MOD DFNBRCDMACHP
23 NBRPILOT Idle HO Relation
ADD NBRCDMACH, RMV NBRCDMACH, LST NBRCDMACH, MOD NBRCDMACHP
24 HHOHANDDOWNTARG
HANDDOWN Hard HO Target Carrier
ADD HNDDWNTRG, RMV HNDDWNTRG, LST HNDDWNTRG, MOD HNDDWNTRG
25
HHODIRECTTARG
Direct Hard HO Target Carrier
ADD DRCTTRG, RMV DRCTTRG, LST DRCTTRG, MOD DRCTTRG
26 Channel CH_INFO Channel Information MOD CHINF
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27 SCH_PARA SCH Allocation Parameters
MOD LOADCTRLPAR
A
28 MCHM Module-Level Channel Management Parameters
MOD MCHM
29
management
SR_CFG Service Redirection Parameters MOD SRCFG
30 SCHM Synchronization Channel Messages MOD SYNCMSG
31 SPM System Parameter Messages MOD SPM
32 SYS_MSG_CTRL_INFO
Overhead Message Control Parameters
MOD SYSMSGCTRL
33 APM Access Parameter Messages MOD APM
34 A_CH Access Channel parameters MOD ACH
35 ESPM Extended system parameter message table
MOD ESPM
36 NLM Neighbor List Messages MOD NLM
37 GSRDM Global Service Redirection messages MOD GSRDM
38 CCLM Extended CDMA Channel List Messages MOD ECCLM
39 EGSRDM Extended Global Service Redirection Messages
MOD EGSRDM
40
System message
GNLM General Neighbor List Messages MOD GNLM
41 FWD_LOAD_CTRL_PARA
Forward Load Control Parameter MOD FLDCTRL
42 REV_LOAD_CTRL_PARA
Reverse LOAD control Parameters MOD RLDCTR
43 ACH_LOAD_CTRL_PARA
Access Load Control Parameters MOD ALDCTRL
44
Load control
BSCRSM BSC-level RSM Parameters MOD BSCRSM
45 TCP parameter RLP BLOB TCP Optimization
Parameter MOD MAPARA
2. Forward Power Allocation Parameters
2.1 Sector Carrier Parameters (PILOT)
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[Command name] MOD CDMACH (Base Station Controller Management\Configuration
Management\Cell Channel Management\Modify Sector Carrier Parameters)
TXGAIN (RF Gain) [Description] This parameter represents the attenuation (in dB) of the radio frequency gain.
[Type] Internal parameter of BTS
[Range and unit] 0~24 dB
[Operating range] 0~20 dB
[Recommended value] 0
[Setting tradeoffs] The value of this parameter depends on the required output power. The
maximum value should not exceed 20dB. To obtain a lower forward output power,
an external attenuator is recommended.
SCTGAIN (Baseband Gain) [Description] This parameter represents the baseband gain.
[Type] Internal parameter
[Range and unit] 0~4095
[Operating range] 500~3200
[Recommended value] 3000
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[Setting tradeoffs] The value of this parameter depends on the required output power. There is an
equation between set value and actual transmit power (P):
P=20*log (SCTGAIN / 3000) + 43 - TXGAIN (dBm).
From the above equation, we can obtain the values in the table below. Currently,
it is recommended to change the forward output power by using an external
attenuator and modifying the radio frequency gain, instead of the baseband gain.
Table 2-1 Relationship between sector gain (baseband gain) and output power Sector gain Output power(dBm)
3000 43
2500 41.4
2000 39.5
1500 37
1000 33.5
500 27.3
2.2 Pilot Channel Parameters (PILOT_CH) [Command name] MOD PLTCH (Base Station Controller Management\Configuration
Management\Algorithm Configuration\Cell Channel Configuration\Modify Pilot
Channel Parameters)
PLTCHGAIN (Pilot Channel Gain)
[Description]
This parameter represents the pilot channel gain in dB. From it, we can get the
percentage of the pilot channel power to the total power.
[Type]
Internal parameter
[Range and unit]
-255~0. (Unit: 0.25 dB) For the conversion method, refer to section 3.1.
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[Operating range]
-40~-21, corresponding to 10% ~30%
[Recommended value]
-28
[Setting tradeoffs]
-63.75 ~ 0dB is represented by 0 ~225. Step: 0.25dB.The ratio of the pilot power to
the total transmit power of sector carrier should be set in consideration of the
capacity and coverage. If the transmit power assigned to the pilot channel is high,
the coverage area will be extended, but the power reserved for the traffic channel will
decrease, so the capacity will decrease, too. When the pilot channel gain is set high,
the forward link and reverse link must be balanced. In the densely-populated urban
areas, where the coverage is not wide, keep the SCTGAIN unchanged, but set a low
pilot channel gain. In this way, not only the coverage can meet the requirement, but
the capacity can increase accordingly.
2.2 Sync Channel Parameters (SYNC_CH)
[Command name] MOD SYNCH (Base Station Controller Management\Configuration Management\Cell
Channel Management -----Modify Sync Channel Parameters)
SYNCHGAIN (Sync Channel Gain)
[Description]
This parameter represents the sync channel gain in dB. From it, we can get the
percentage of the sync channel power to the total power.
[Type]
Algorithm parameter
[Range and unit]
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-63.75 ~0. For the conversion method, refer to section 3.1.
[Operating range]
-80~-61
[Recommended value]
-68
[Setting tradeoffs]
-63.75 ~ 0dB is represented by 0~255. Step: 0.25dB. Sync channel gain = pilot
channel gain -10dB. If this relationship between sync channel gain and pilot channel
gain remains unchanged, the coverage of the sync channel will be roughly the same
as that of the pilot channel
2.3 Paging Channel Parameters (P_CH) [Command name] MOD PCH (Base Station Controller Management\Configuration Management\Cell
Channel Configuration\Modify Channel Parameters)
PCHGAIN (Paging Channel Gain)
[Description]
This parameter is used to set the paging channel gain in dB. From it, we can get the
percentage of the paging channel power to the total power.
[Type]
Algorithm parameter
[Range and unit]
-255~0. For the conversion method, refer to section 3.1.
[Operating range]
The value of this parameter depends on the pilot gain.
[Recommended value]
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Pilot channel gain -1.5dB. For example, if the pilot channel gain is -28, the
recommended value is -34. (Paging rate = 9600, namely, PRAT =0)
[Setting tradeoffs]
It is the ratio of paging channel transmit power to the total transmit power of sector
carrier (in dB). -63.75 ~ 0dB is represented by -255~0. Step: 0.25dB.The paging
channel gain is related to the paging channel rate. When the paging channel rate is
9600, paging channel gain = pilot channel gain - 1.5dB. When the paging channel
rate is 4800, paging channel gain = pilot channel gain - 4.5dB.The PRAT field in
SCHM (sync channel message) is used to configure the paging channel rate. RAT=0,
9600; PRAT=1, 4800
BCMD (Broadcast Mode) [Description] Broadcast mode of paging channel can set multiple slots or cyclic broadcast. When
MS works with slot mode and monitors paging channel, the BTS should send
broadcast message through multiple slots mode or cyclic broadcast mode. Currently,
this product only supports multiple slots mode.
[Type] Um interface
[Range and unit] Multi-timeslot or periodic broadcast
[Operating range] Multi-timeslot
[Recommended value] Multi-timeslot
[Setting tradeoff] None
2.4 Quick Paging Channel Parameters (QP_CH) [Command name]
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MOD QPCH (Base Station Controller Management\Configuration Management\Cell
Channel Configuration\Modify Quick Paging Channel Parameters)
QPCHNUM (Number of Quick Paging Channels)
[Description]
This parameter represents the number of quick paging channels. According to the
descriptions in protocol, when QPCH SUPPORTED is set to 1, this field must be set
to 0. If QPCH SUPPORTED is set to 0, BTS must omit this field.
[Type]
Um interface parameter (ESPM).
[Range and unit]
0~3
[Operating range]
0~3
[Recommended value]
0, which means QPCH is not recommended.
[Setting tradeoffs]
None
QPCHRT (QPCH Date Rate) [Description] This parameter represents quick paging channel rate (the representation of quick
paging channel rate is of the reverse with paging channel rate. For paging channel
rate, 0 stands for 9600bps but 0 stands for 4800bps in quick paging channel rate).
[Type] Um interface parameter (ESPM)
[Range and unit] 0-4800bps, 1-9600 bps
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[Operating range] 0-1
[Recommended value] 0 is set to 4800 bps, which can save power consumption of QPCH.
[Setting tradeoff] None
PWRLEVCFG (Relative Power Level of CCI Modulation Symbol)
[Description]
This parameter represents the quick paging channel transmit power relative to the
pilot channel, when the PWRLEVCFG is transferred on the quick paging channel. If
CCISPT is set to “1”, configure the value according to Table 2-2.
Table 2-2 Quick paging channel power offset
PWRLEVPAGE
PWRLEVCFG
(binary)
Transmit Power
Level
(relative to pilot
transmit power)
000 -5
001 -4
010 -3
011 -2
100 -1
101 0
110 1
111 2
(IS20005A Table 3.7.2.3.2.13-3)
[Type] Um interface parameter (ESPM)
[Range and unit]
0~7dB
If the offset is -5dB, the actual range is -5~2dB.
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[Operating range]
0~7
[Recommended value]
5, namely, 0dB
[Setting tradeoffs]
The tradeoff between the capacity of forward link and the standby time of the
MS should be considered when the transmit power of the quick paging channel
is set. If the transmit power of the quick paging channel is set high, the capacity
of the forward link will decrease, but the probability of successful detection of
the MS will be high, so its standby time can be prolonged. Vice versa. If the
load of a sector carrier is light, the value can be set large. If the forward load is
heavy, the value can be set small. The parameter should be set properly in
consideration of the load and the paging success ratio.
PWRLEVPAGE (Relative Power Level of PI Modulation Symbol)
[Description]
This parameter represents the quick paging channel transmit power relative to
the pilot channel, when the PWRLEVPAGE is transferred on the quick paging
channel. If PISPT is set to “1”, the value should be configured according to
Table 2-2.Refer to PWRLEVCFG.
[Type]
Um interface parameter (ESPM).
[Range and unit]
0~7dBIf the offset is -5dB, the actual range is -5~2dB.
[Operating range]
0~7
[Recommended value]
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7, namely, 2dB
[Setting tradeoffs]
Usually, this parameter is first set to “2” to ensure the paging success ratio,
and it can be set to a smaller value, depending on the actual requirement. If
the load of a sector carrier is light, the value can be set large. If the forward
load is heavy, the value can be set small. The parameter should be set
properly in consideration of the load and the paging success ratio.
3. Recommendations for Power Control Parameter Configuration
3.1 Descriptions of Special Representation
3.1.1 Reverse Outloop Set Value The representation of the reverse out loop set value in R01 is greatly different from
that in R02.
In R02, the physical meaning of the reverse out loop set value in the database is
Eb/Nt for all rate configurations (RCs).The system automatically converts the Eb/Nt
into the corresponding Ec/Io and then sets it in CSM5000.
Representation of Eb/Nt: 0~255 represents 0~31.875dB.
Eb/Nt = X 0.125
For example, If REVINITSETP is set to 48, the Eb/Nt is 6dB; for RC1, the
corresponding Ec/Io is -15dB, and for RC3, the corresponding Ec/Io is -18.75dB.
In R01, the physical meaning of the reverse out loop set value in the database is
(Eb/Nt-21dB) for all RCs.The system automatically converts the Eb/Nt into the
corresponding Ec/Io for different RCs and then sets it in CSM5000.
Representation of (Eb/Nt-21dB): 0~255 represents -63.75~0dB.
Eb/Nt -21dB= -(255 – X)*0.25
For example, If REVINITSETP is set to “203”, the Eb/Nt is 8dB; for RC1, the
corresponding Ec/Io is -13dB, and for RC3, the corresponding Ec/Io is -16.75dB.
The correspondence between Eb/Nt and Ec/Io for different RCs is shown below:
RC1: Ec/Io = Eb/Nt - 21
RC2: Ec/Io = Eb/Nt - 21 + 1.75
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RC3: Ec/Io = Eb/Nt - 21 - 3.75
RC4: Ec/Io = Eb/Nt - 21 - 3.5
EbNt = X × 0.125
R03 version follows the representation of R02 version.
3.1.2 Forward Channel Transmit Power The transmit power of all forward channels are represented by the gain relative to
the total transmit power of the sector carrier. The transmit powers of pilot channel,
sync channel and paging channel, maximum and minimum transmit powers of
forward traffic channel, and initial transmit power of forward traffic channel are all
represented in this way. Value range of X: 0 ~ 255
Value range of Y: 0 ~ 100%
The relationship between X and Y can be represented by the following equation
- (255-X) 0.25 =10logY
Where, X represents the forward channel gain, and Y represents the ratio of the
forward channel power to the total sector power.
1) Given the channel gain, how to calculate the percentage of the channel power
to the total sector power?
For example, if the gain of a channel is 227, then X=227.- (255-227) 0.25=-7dB,
and Y=10-0.7 100% =19.9%.That is, if the gain X =227, the corresponding channel
transmit power is approximately 20% of the total sector power.
2) Given the percentage of the channel power to the total sector power, how to
calculate the channel gain?
For example, if the channel gain accounts for 20% of the total sector power,
that is, Y=0.2, then X= 255 + 4 × 10logY=227
The above shows the representation and calculation mode of earlier R03
version. In R03 version, the representation and calculation mode are different but
the parameter meanings are the same. The specific representations are as
follows: Value range of X: -255 ~ 0, value range of Y: 0 ~ 100%. X/ 4 = 10 LogY.
Wherein, X represents parameter setting value of forward channel gain and Y
represents the ratio of the forward channel power to the total sector power. For
example, if the channel gain X is - 28, -28/4= -7dB, Y = 10-0.7 =19.9%. That is, if
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the gain X =-28, the corresponding channel transmit power is approximately 20%
of the total sector power. The relationship between corresponding parameter
values in earlier R03 version and R03 version: if the set value in earlier R03
version is A, the value is set to A – 255 in R03 version.
3.1.3 Eb/Nt Set Value of Forward Fast Power Control The representation of this type of parameters is relatively simple. The value range of
these parameters is 0~255 and the step is 0.125dB.The parameter value times the
step is the actual value.
For example, if FOR_MAX_FCH_SET_PT is set to “112”, the actual value is
112 0.125=14dB
3.1.4 Representation of FER FER adopts the representation stipulated in the protocol. See the table below. In the
CDMA system, the quality is closely related with capacity. When the other conditions
remain unchanged, the capacity will decrease if the quality increases (that is, the
FER drops). Otherwise, the capacity will increase if the quality drops (that is, the
allowed FER rises).When the load in a cell is heavy, the capacity of the cell can be
enlarged by raising the FER. That is the so-called load control.
Table 3-1 Target FER
FER (Binary) Frame Error Rate
0 0.2%
00001-10100 0.5% -10% (in units of
0.5%)
10101-11001 11% - 15% (in units of
1.0%)
11010-11110 18% - 30% (in units of
3.0%)
11,111 Reserved
3.2 BSC-Level Power Control Parameters (BSCPWR) [Command name]
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MOD/LST BSCPWR
PWRSYNSW (TCH Power Sync Switch) [Descriptions] Whether to enable power sync function.
[Type] Algorithm parameter
[Range and unit] 0 –Yes (ON)
1—NO (Off)
[Operating range] 0 and 1
[Recommended value] 0--disable
PWRADJTP (TCH Power Syn. Adjust Type) [Description] This field represents whether FCH power sync algorithm to use relative or
absolute value for power adjustment. The relative value here is that of At/Ap.
[Type] Algorithm parameter
[Range and unit] 0-------relative value
1------absolute value
[Operating range] 0 and 1
[Recommended value] 0—relative value, which should not be modified
STARTVALVE (TCH Power Sync Start Valve) [Description] If FCH power sync algorithm switch is open, power sync occurs during soft
handoff when power difference between the branches is more than this valve.
[Type]
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Algorithm parameter
[Range and unit] 0--255, with the unit of 0.25dB
[Operating range] [Recommended value] 8, which should not be modified
[Setting tradeoff] The larger parameter value, the larger start valve, and the larger power
difference between allowed branches is. Vice versa.
STOPVALVE (TCH Power Sync Stop Valve) [Description] If FCH power sync algorithm switch is open, perform once power sync
adjustment during soft handoff because power difference between branches is
more than” TCH power sync start valve”. Continue to perform power sync
adjustment if the power difference between branches is still more than this
valve. If the power difference is less than this valve after the adjustment, stop
the power sync adjustment.
[Type] Algorithm parameter
[Range and unit] 0--255, with the unit of 0.25dB
[Operating range] 4--16 (stop valve is smaller than start valve)
[Recommended value] 4, which should not be recommended
[Setting tradeoff] The larger parameter value, the easier power sync stops and the larger power
difference between allowed branches. Vice versa.
CALCUMETHOD (TCH Power Sync Calculation Method) [Description] This field represents the calculation method of At/Ap in the FCH power sync.
[Type]
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Algorithm parameter
[Range and unit] 0---METHOD0 (extreme value average method), 1----METHOD1 (the
strongest branch method), 2----METHOD2 (hybrid method) and
3----METHOD3 (weighted-average method)
[Operating range] 0, 1, 2 and 3
[Recommended value] 0---adopt extreme value average method, which should not be modified.
DELAYFRAMES (TCH Power Sync Delay Frames) [Description] After once power sync adjustment is delivered, the reverse frame received
within a time period cannot reflect power change after the adjustment and
cannot be a trigger source to trigger a new adjustment. Perform a new
adjustment after waiting for a delay. This parameter represents this delay.
[Type] Algorithm parameter
[Range and unit] 3--255, with the unit of frame
[Operating range] 3--255
[Recommended value] 3, which should not be modified
[Setting tradeoff] This parameter affects power sync frequency. The larger the parameter value,
the lower the frequency. Vice versa.
SCHPWRSYNSW (SCH Power Synch Switch) [Description] Whether to enable SCH power Sync function.
[Type] Algorithm parameter
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[Range and unit] 0—Off 1---On
[Operating range] 0 and 1
[Recommended value] 0
SCHPWRADJTP (SCH Power Sync Adjustment Type) [Description] This parameter represents that SCH power sync algorithm adopts relative or
absolute value for power adjustment. Here, relative value is that of At/Ap.
[Type] Algorithm parameter
[Range and unit] 0—relative value 1---absolute value
[Operating range] 0---relative value
[Recommended value] 0, which should not be modified
SCHCALCMETHOD (SCH Power Sync Calculation Method) [Description] This field represents At/Ap calculation method in the SCH power sync.
[Type] Algorithm parameter
[Range and unit] 3---METHOD3 (weighted-average method). Refer to [Range and Unit] of
“TCHCALCMETHOD (TCH Power Sync Calculation Method)”.
[Operating range] 3
[Recommended value] 3---adopt weighted-average method, which should not be modified.
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SCHSYNPERIOD (SCH Power Sync Period) [Description] Once SCH power synch algorithm is activated, start periodical power sync.
This parameter represents the period for SCH power sync. But FCH power
sync algorithm is activated based on start valve and stop valve.
[Type] Algorithm parameter
[Range and unit] 0--255, with the unit of frame
[Operating range] 3--10
[Recommended value] 5, which should not be recommended
[Setting tradeoff] The larger parameter value, the larger SCH power sync frequency..
If the frequency is large, power adjustment effect may not be feed back in
time to affect sync performance.
REVSCHPWRCTRLSW (Reverse SCH Power Control Switch) [Description] Whether to enable reverse SCH power control function.
[Type] Algorithm parameter
[Range and unit] 0---Off 1--On
[Operating value] 0 and 1
[Recommended value] 0--Off
3.3 Reverse Closed Loop Power Control Parameters (RCLPC) [Command name]
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MOD RCLPC (Base Station Controller Management\Configuration
Management\Algorithm Management\Modify Reverse Closed Loop Power
Control Parameters)
REVPWRCSTEP (Reverse Power Control Step)
[Description]
This parameter represents the power control step in the reverse closed loop
power control mode. When the MS receives an UP power control bit on the
forward power control sub-channel, the transmit power of the MS will increase
by one power control step on the basis of the open loop estimation and the
previous closed loop adjustment value. If the MS does not support reverse
supplementary channel or reverse supplementary code channel, the MS must
support power control step with 1 dB. Otherwise, the MS must support power
control step with 0.5 dB and 1 dB. If MS supports power control step with
0.25dB, MS should support power control step with 0.5dB and 1 dB.
[Type]
Um interface parameter, used by the MS (PCNM, UHDM and GHDM).
[Range and unit]
0 ~ 2, where 0 represents a step of 1dB, 1 represents a step of 0.5dB and 2 a
step of 0.25dB respectively.
[Operating range]
0~2
[Recommended value] 1
[Setting tradeoffs]
If the step is small, the power will change steadily. Otherwise, the power
will change dramatically. Because the reverse power can be adjusted 800
times per second, the controlled speed can meet the requirement. The smaller
the power control step is, the more precise the power control is. In this way,
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less power will be wasted. Therefore, a step of 0.25dB is optimal to save the
system power.
When the MS does not support some power control steps, but if the value
of this parameter is small, the MS will automatically select a step that it
supports. For example, if the minimum power control step that the MS supports
is 0.5dB, but the reverse power control step is set to 0.25dB in the system, the
MS will automatically set the power control step to 0.5dB.
VFCHRLGAINADJ (Voice Service R-FCH Power Adjust Gain Relative to ACH) DFCHRLGAINADJ (Data Service R-FCH Power Adjust Gain Relative to ACH)
[Description]
This parameter represents the power adjustment of the reverse traffic channel
relative to access channel, enhanced access channel and reverse universal
control channel. In the following formula, after the MS accesses the system, the
initial power of the traffic channel is the power of the current access channel
plus the value of this parameter.
mean output power (dBm) =
- mean input power (dBm)
+ offset power (from Table 2.1.2.3.1-1)
+ interference correction
+ ACC_CORRECTIONS
+ RLGAIN_ADJs
They are set based on voice and data service separately.
[Type]
Um interface parameter, used by the MS (ECAM)
[Range and unit]
-8 dB~7dBoffset.
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[Operating range]
0~6
[Recommended value]
0
[Setting tradeoffs]
A high value can improve the transmission quality at the early stage of calls as
well as the call setup success ratio, but will affect the system capacity and
increase the power consumption of the MS.
RLGAINSCHPLT1X (1X R-SCH Gain Offset Relative to R-PICH) RLGAINSCHPLT2X (2X R-SCH Gain Offset Relative to R-PICH) RLGAINSCHPLT4X (R 4X R-SCH Gain Offset Relative to R-PICH) RLGAINSCHPLT8X (R 8X R-SCH Gain Offset Relative to R-PICH) RLGAINSCHPLT16X (16X R-SCH Gain Offset Relative to R-PICH) RLGAINSCH_PLT32X (32X R-SCH Gain Offset Relative to R-PICH)
[Description]
The group of above parameters represent the power offsets of the SCH relative
to the pilot channel and the power offset is delivered to the MS in the extended
supplement channel assignment message (ESCAM).
Note: The value of this parameter is a part of the power offset of reverse SCH
and reverse pilot, as shown in the following formula:
mean code channel output power (dBm) =
mean pilot channel output power (dBm)
+ 0.125 *( Nominal_Attribute_Gain[Rate, Frame
Duration, Coding]
+ Attribute_Adjustment_Gain[Rate, Frame Duration,
Coding]
+ Reverse_Channel_Adjustment_Gain[Channel]
- Multiple_Channel_Adjustment_Gain[Channel]
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- Variable_Supplemental_Adjustment_Gain[Channel]
+ RLGAIN_TRAFFIC_PILOTs
+ RLGAIN_SCH_PILOT[Channel]s)
+ IFHHO_SRCH_CORR.
[Type]
Um interface parameter, used by the MS (ESCAM)
[Range and unit]
-32 ~31, (unit: 0.125dB).
[Operating range]
0~22
[Recommended value]
Shown in the following table
If recommended value is set to 8, it is 1dB.
Rate Recommended value
1X 8
2x 12
4x 16
8x 18
16x 20
32x 22
[Setting tradeoffs]
A high value of this parameter can improve the transmission efficiency of the
reverse SCH, but will affect the reverse capacity. The higher the rate of SCH
is, the higher the required power is. Therefore, the offset of this parameter
should also be larger.
FCHMPLTGAINRC3 (Gain of RC3 R-PICH Relative to Main Channel for FCH)
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FCHMPLTGAINRC4 (Gain of RC4 R-PICH Relative to Main Channel for FCH) [Description] This group of parameters is used reverse inloop power control of IS2000. BTS
converts representation of traffic channel EbNt of target SetPoint sent from
the BSC into that of Eclo and compares with actual reverse pilot Eclo to
determine reverse power control bit. This parameter is sent through Abis
interface and A3 interface and delivered to BTS by BSC.
[Type] Abis and A3 interface protocol parameters, used by BTS.
[Range and unit] -255–0, with the unit of 0.125dB
[Operating range] -255–0
[Recommended value] 0
[Setting tradeoff] None
VFCHREVINIT (Voice Service Reverse Initial Set Value for FCH) DFCHREVINIT (Data Service Reverse Initial Set Value for FCH)
[Description]
For different RCs, the system automatically converts the value of this
parameter to the corresponding Ec/Io and then sets it in BTS (Refer to section
3.1.1 Set Value of reverse OutLoop FCH).The value of this parameter is
reasonable if it does not cause too high an overshoot.
They are set based on voice and data service separately.
[Type]
Algorithm parameter
[Range and unit]
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0~255 (unit: 0.125dB)
[Operating range]
(REV_MIN_FCH_SET_PT + 3dB) ~ REV_MAX_FCH_SET_PT -1dB)
[Recommended value]
48, which means the initial Eb/Nt =6dB for all RCs.
[Setting tradeoffs]
If the value of this parameter is large, the reverse power control will start at
a high power level, so power will be wasted at the beginning. If the value is small,
it is necessary to increase the Eb/Nt through the reverse power control. In this
way, the FER at the very beginning of calling may be higher than the expected
FER. This value will affect the time in which the Eb/Nt can be adjusted to a
proper value through the reverse power control. If the value of this parameter is
properly set, the Eb/Nt can be adjusted to the required value quickly. Thus, the
network performance can ensure that the FER will not be higher than the
specified FER, and meanwhile, little power resource is wasted.
If this value is too small, network FER cannot satisfy requirements (such as
1%). If this value is too large, power waste occurs at the very begging.
VMAXFCH (Voice Service Max. Value of FCH Outer Loop) DMAXFCH (Data Service Max. Value of FCH Outer Loop)
[Description]
This parameter represents the maximum set value of out loop FCH Eb/Nt. They
are set based on voice and data service separately.
[Type]
Algorithm parameter
[Range and unit]
0~255 (unit: 0.125dB)
[Operating range]
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48~96
[Recommended value]
96, which means the maximum set value of out loop FCH Eb/Nt =12dB for all
RCs
[Setting tradeoffs]
If the value of the parameter is large in the severe radio environment, the call
quality can be ensured but the reverse capacity of the system will decrease.
If the value is small, a call drop may occur under the fading environment, such
as at a corner. Under the interference environment, a properly high value of this
parameter can ensure the call quality and reduce the call drop ratio. But the
function is subject to the limitation of the maximum transmit power of the MS.
VMINFCH (Voice Service Mini. Value of FCH Outer Loop) DMINFCH (Data Service Mini. Value of FCH Outer Loop)
[Description]
This parameter is a reverse FCH closed loop power control parameter. The
parameter represents the minimum set value of reverse FCH Eb/Nt. They are
set based on voice and data service separately.
[Type]
Algorithm parameter
[Range and unit]
0~255 (unit: 0.125dB)
[Operating range]
8~32
[Recommended value]
Mini. Voice service FCH outloop set value is set to 16 for all RCs and the
minimum set value of outloop EbNt= 2dB.
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Mini. Data service FCH outloop set value is set to 32.
[Setting tradeoffs]
If the value of this parameter is set too large, the Eb/Nt will be higher than the
required value, so the reverse power will be wasted and the reverse capacity
will greatly be affected.
If the value is set small, there is much room for the adjustment of reverse out
loop algorithm. So the call quality can be ensured and the reverse capacity can
be improved, given a high power control performance.
But if the value is set too small, it is possible that the out loop set value
decreases so much that it can not rise in time under the fading environment, so
the call quality may be affected.
MAXDCCH (Max. Value of DCCH) [Description] Refer to [Description] of max. FCH outloop set value.
MINDCCH (Mini. Value of DCCH) [Description] Refer to [Description] in mini. FCH outloop set value.
MAXSCH (Max. Value of SCH) [Description] This parameter represents maximum Eb/Nt set value of the reverse SCH
closed loop power control (outloop corresponding to FCH).
[Type] Algorithm parameter
[Range and unit] 0~255, with the unit of 0.125dB
[Operating range] 48~96
[Recommended value]
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96, which represents maximum outloop set value EbNt =12dB for all rates.
[Setting value] If this parameter is set to a higher value, data transmission quality can be
ensured even under server radio environment but system reverse capacity
decreases.
If this parameter is set a small value, many error frames occur, affecting data
service transmission. Under the interference environment, a properly high
value of this parameter can ensure the data transmission quality and reduce
the call drop ratio. But the function is subject to the limitation of the maximum
transmit power of the MS.
MINSCH (Mini. Value of SCH) [Description] This parameter represents the minimum Eb/Nt set value of reverse SCH
closed loop power control (outloop corresponding to FCH).
[Type] Algorithm parameter
[Range and unit] 0~255, with the unit of 0.125dB
[Operating range] 8~32
[Recommended value] 32, which represents minimum outloop set value EbNt= 4dB for all RCs.
[Setting tradeoff] If this parameter is set a high value, reverse SNR EbNt is higher than
required value to waste reverse power and reverse capacity is affected
greatly.
If this parameter is set to a small value, there is much room for the
adjustment of reverse SCH out loop algorithm. So the data service
transmission quality can be ensured and the reverse capacity can be
improved, given a high power control performance.
FCHPWRCFRQ (Reverse Outer Loop Power Control Period for FCH)
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DCCHPWRCFRQ (Reverse Outer Loop Power Control Period for DCCH)
[Description]
The value of this parameter determines the reverse out loop control period. If
PWR_CTRL_FREQ_FCH (reverse FCH out loop power control period)
consecutive good frames are received, the Eb/Nt will decrease by
EB_NT_DOWN_STEP_FCH (Eb/Nt down step).This parameter is one of
reverse power control parameters. The algorithm convergence should be
considered when this parameter is modified.
[Type]
Algorithm parameter
[Range and unit]
0~255 (unit: frame).
[Operating range]
This value should correspond to the target FER of FCH.
[Recommended value]
33
[Setting tradeoffs]
If the value of this parameter is set large, the control period will be long and
the power will change steadily. If the value is set small, the control period will
be short and the power will change dramatically
FCHNTDWNSTEP (Eb/Nt Down Step for FCH)
[Description]
This parameter represents the Eb/Nt down step after PWR_CTRL_FREQ_FCH
(power control period of reverse outloop (FCH)) consecutive good frames
appear.
[Type]
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Algorithm parameter
[Range and unit]
0~255 (unit: 0.125dB)
[Operating range]
0~255
[Recommended value]
1, namely, 0.125dB
[Setting tradeoffs]
If the value is set small, the power will change steadily and the overshoot will
be low. If the value is set large, the power will change dramatically and the
overshoot will be high. To obtain a power control precision as high as possible,
the value is usually set to 1
FCHENMAXSTEP (Eb/Nt Max. Adjustment Step for FCH)
[Description]
This parameter represents the allowable maximum adjustment step each time
the power is adjusted. Refer to “PWR_CTRL_FREQ_FCH (power control
period of reverse outloop (FCH))”
[Type]
Algorithm parameter
[Range and unit]
0~255 (unit: 0.125dB)
[Operating range]
5~10
[Recommended value]
10, namely, 1.25dB
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[Setting tradeoffs]
This parameter is used to restrict the adjustment step of the out loop power
control so that the adjustment step could not be too large. If the adjustment
step is set too small, the desired adjustment will be so restricted that the
normal power control performance could fail. Therefore, the adjustment step
can not be set too small
LNKRPTFRQ (Power Control Report Granularity)
[Description]
This parameter represents the time granularity when the reverse link report of
FMR is reported to SPU.
[Type]
Algorithm parameter
[Range and unit]
10~255 (unit: 100ms)
[Operating range]
10~255
[Recommended value]
20, which should not be modified
[Setting tradeoffs]
None
OLOOPPERIODSCH (Power Control Period of Reverse Outer Loop for SCH) [Description] This value determines adjustment period of reverse SCH outloop (or closed
loop, because reverse SCH closed loop has no obvious outloop). After
OUTER_LOOP_PERIOD_SCH (Power Control Period of Reverse Outer
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Loop for SCH) good frames are received, decrease OLOOPDSTEP (Eb/Nt down step for SCH). Consider algorithm convergence when a group of
parameters in reverse SCH closed loop power control, which is similar to FCH
outer loop. [Type] Algorithm parameter
[Range and unit] 0~255, with the unit of frame
[Operating range] 0~255
[Recommended value]
19
[Setting tradeoff] If the value of this parameter is set large, the adjustment period will be long
and the power will change steadily. If the value is set small, the adjustment
period will be short and the power will change dramatically.
OLOOPDSTEPSCH (Eb/Nt Down Step for SCH) [Description] This parameter represents set down step after
OUTER_LOOP_PERIOD_SCH good frames are received.
[Type] Algorithm parameter
[Range and unit] 0~255, with the unit of 0.125dB
[Operating range] 0~255
[Recommended value] 1, namely, 0.125dB
[Setting tradeoff] If this parameter is set to a small value, the power control is stable, with little
adjustment. If this parameter is set to a large value, power control changes
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dramatically, with obvious adjustment. To obtain accurate power control
value, this parameter is set to 1 in general.
OLOOPMAXUSTEPSCH (Eb/Nt Max. Adjustment Step for SCH) [Description] This parameter represents allowable max. step after reverse SCH closed loop
power control algorithm obtains set up step.
[Type] Algorithm parameter
[Range and unit] 0~255, with the unit of 0.125dB
[Operating range] 5~10
[Recommended value] 10, namely, 1.25dB
[Setting tradeoff] This parameter is to restrict once outloop adjustment value within an allowable
range. If this value is set too small, the normal adjustment is restricted to
affect normal power control performance. Therefore, this value should not set
too small. RCAGFAC (SCH Inner Loop Power Control Adjust Factor) [Description] This parameter represents a ratio factor of actual RCAG adjustment to
calculated RCAG adjustment. Currently, this parameter is set to 1, indicating
that perform the adjustment directly through calculated RCAG adjustment.
[Type] Algorithm parameter
[Range and unit] 0~255
[Operating range] 0~1
[Recommended value]
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1, which should not be modified
ILOOPTHRESCH (SCH Inner Loop Power Control Threshold) [Description] This parameter represents a threshold whether to perform RCAG adjustment.
RCAG adjustment aims to enable SCH Eb/Nt estimated by the BSC close to
required value. If there is an obvious difference between this estimation value
and set value, trigger RCAG adjustment.
[Type] Algorithm parameter
[Range and unit] 0~255, with the unit of 0.125dB
[Operating range] 0~8
[Recommended value] 4, namely, 0.5dB, which should not be modified
ILOOPINTSCH (SCH Inner Loop Power Control Interval) [Description] This parameter represents minimum interval sending two adjacent PCNMs,
because RCAG adjustment is sent to MS through power control message,
that is, minimum interval of two adjacent RCAG adjustments.
[Type] Algorithm parameter
[Range and unit] 0~255, with the unit of frame
[Operating range] 0~255
[Recommended value] 20, which should not be modified
[Setting tradeoff]
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If this value is set small, signaling overload on the FCH may occur. If this
value is set large, power control rate is slow.
SETEBNTVALTIMESCH (SCH Outer Loop Eb/Nt Set Valid Duration) [Description] This parameter represents whether the SCH requested by two adjacent Data
Burst inherits interval of Eb/Nt set value. Because MS applies for reverse SCH
and if the interval between Duration start time of latter SCH and end time of
former SCH is less than this parameter, the Eb/Nt set value of latter SCH
inherits the final set value of former Eb/Nt.
[Type] Algorithm parameter
[Range and unit] 0~255, with the unit of frame
[Operating range] 0~255
[Recommended value] 20, which should not be modified
MAXRCAG (Max. RCAG Value) [Description] This parameter represents maximum RCAG value.
According to the protocol, the code channel transmit power is shown below
when MS sends traffic channels of RC3, 4, 5 and 6:
mean code channel output power (dBm) =
mean pilot channel output power (dBm)
+ 0.125 × (Nominal_Attribute_Gain[Rate, Frame Duration,
Coding]
+ Attribute_Adjustment_Gain[Rate, Frame Duration, Coding]
+ Reverse_Channel_Adjustment_Gain[Channel]
- Multiple_Channel_Adjustment_Gain[Channel]
- Variable_Supplemental_Adjustment_Gain[Channel]
+ RLGAIN_TRAFFIC_PILOTs
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+ RLGAIN_SCH_PILOT [Channel] s)
+ IFHHO_SRCH_CORR
Where, mean pilot channel output power represents output power
of reverse pilot channel and transmit power when reverse closed
loop power control adjusts R-PICH. On the basis of reverse pilot
power, the overlay of FCH transmit power and SCH transmit
power has offsets, which are set by many parameters. They are
detailed as follows:
RLGAIN_TRAFFIC_PILOTs: Efficient for reverse FCH,
reverse SCH and DCCH. They are delivered to MS through
ESPM.
RLGAIN_SCH_PILOT: Efficient for R-SCH only. It is delivered
through ESCAM.
Nominal_Attribute_Gain: MS should keep a
Nominal_Attribute_Gain table, reflecting power offset of RSCH,
RFCH, or RDCCH to reverse pilot channel. They are specified
in a table by the protocol.
Attribute_Adjustment_Gain: MS should keep an
Attribute_Adjustment_Gain table, including data rates, frame
length, code rate and power gain relative to reverse pilot
channel. MS initializes this table to 0.
Reverse_Channel_Adjustment_Gain: Similar to
Attribute_Adjustment_Gain. This parameter is abbreviated as
RCAG.
Multiple_Channel_Adjustment_Gain: If reverse pilot channel is
eliminated and MS is sending two or more code channels, MS
should set this parameter based on the method specified by
the protocol. Otherwise, MS sets this parameter to 0. This
adjustment decreases transmit power of R-FCH to increase
FER of R-FCH after MS starts to send R-SCH. This parameter
is abbreviated as MCAG.
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If MS is sending two or more code channels except reverse pilot
channel, MS sets Multiple_Channel_ Adjustment_Gain [Channel]
for each channel based on the following modes:
a) Label Max_Channel as the code channel with highest
Pilot_Reference_Level when MS is sending all the code
channels. Check the Pilot_Reference_Level through protocol
table.
b) Set Multiple_Channel_Adjustment_Gain[Max_Channel] to 0.
c) The settings for other channels are shown below:
Multiple_Channel_Adjustment_Gain[Channel]=Pilot_Reference
_Level[Max_Channel] - Pilot_Reference_Level[Channel]
Variable_Supplemental_Adjustment_Gain: If MS supports reverse
SCH of variable rate and is using the rate on R-SCH, MS sets this
parameter based on the method provided by protocol. Otherwise,
set this parameter to 0.
IFHHO_SRCH_CORR represents a correction of different
frequency hard handoff.
For the above variables, modify dynamically power offset of
R_SCH relative to R-PICH. Implement reverse SCH power control
through Nominal_Attribute_Gain and
Reverse_Channel_Adjustment_ Gain.
Because the operating range to adjust relevant parameters of
the former in the PCM is inconsistent with initial value range of MS,
the latter instead of the former is used for an adjustment of SCH
power control. That is, RCAG.
[Type] Algorithm parameter
[Range and unit] -48~48, with the unit of 0.125dB
[Operating range] -48~48
[Recommended value] 48, which should not be modified
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MINRCAG (Mini. RCAG Value) [Description] This parameter represents the minimum RCAG value. Refer to [Description] in the maximum RCAG value”.
[Type] Algorithm parameter
[Range and unit] -48~48, with the unit of 0.125dB
[Operating range] -48~48
[Recommended value] -8, which should not be modified
MAXRCAGADJSTEP (Max. RCAG Adjust Step) [Description] This parameter represents maximum adjustment step in case of RCAG
adjustment.
[Type] Algorithm parameter
[Range and unit] 0~96, with the unit of 0.125dB
[Operating range] 0~96
[Recommended value] 8, which should not be modified
3.4 Forward Slow Power Control Parameters (FSLOWPC) [Command name] MOD FSLOWPC (Base Station Controller Management\Configuration
Management\Algorithm Management\ Modify Forward Slow Power Control
Parameter)
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FWDMAXCHGAIN (Max. Transmit Power of FCH)
[Description]
This parameter represents the maximum transmit power of forward channel in
the measurement report power control mode. The capacity and quality can well
be balanced by modifying the value of this parameter. Therefore, this
parameter will be determined according to the actual requirement.
[Type]
Algorithm parameter
[Range and unit]
-255~0, with the unit of 0.28dB. For the representation, refer to 3.1.3.
[Operating range]
(pilot channel gain -6dB) ~ pilot channel gain
[Recommended value]
Pilot channel gain -3dB (PLTCHNPWRGAIN - 12). For example, if the pilot
channel gain is -28, the recommended value is -40.
[Setting tradeoffs]
This parameter is used to restrict the maximum transmit power of forward
channel to avoid a single traffic channel from occupying excessive forward
power resources as a result of the power control. Under severe environments,
if the value of this parameter is set too large, the call quality can still keep at a
certain level, but the forward capacity will decrease. If the value is set too
small, the call quality will be greatly degraded, or even call drops may occur,
but the forward capacity will relatively increase.
FWDMINCHGAIN (Min. Transmit Power of FCH)
[Description]
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This parameter represents the minimum transmit power of forward channel in
the measurement report power control mode.
[Type]
Algorithm parameter
[Range and unit]
-255~0, with the unit of 0.25dB. For the representation, refer to 3.1.3.
[Operating range]
(Pilot channel gain -13dB) ~ (pilot channel gain - 9dB)
[Recommended value]
Pilot channel gain -9dB (PLTCHPWRGAIN -36). For example, if the pilot
channel gain is -28, the recommended value is -64. In the practical networks,
this value can be set lower properly to increase the system capacity and keep
the call drop ratio within the required range.
[Setting tradeoffs]
Under good radio environments, if the value of this parameter is set large, the
improvement of call quality will not be very significant, but the forward capacity
will decrease. If the value is set small, the change of call quality will not be
significant, either, but the forward capacity will increase. Ensure that the power
can increase quickly when the radio environment becomes deteriorated
FWDINITCHNGAIN (FCH Initial Transmit Power)
[Description]
This parameter represents the initial transmit power of forward channel in the
measurement report power control mode. In the capacity test, to ensure the
capacity, set appropriately initial transmit power of forward channel to a small
value. For example, if radio environment of capacity test is good, decrease this
parameter to -68 (pilot channel gain is -28), but a call must be connected.
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[Type]
Algorithm parameter
[Range and unit]
-255~0, with the unit of 0.25dB. For the representation, refer to 3.1.3 [Operating range]
(FWDMAXCHGAIN - 3dB) ~ FWDMAXCHGAIN.
FWDMAXCHGAIN is determined by pilot gain. For the operating range, see
that in “FWDMAXCHGAIN (max. transmit power of forward channel)”.
[Recommended value]
Pilot channel gain-7dB (PLTCHPWRGAIN -28). If pilot gain is -28, this value is
-56.
[Setting tradeoffs]
The initial power should be slightly lower than the maximum transmit power so
as to ensure the call quality when the call is established. If forward radio
environment is good, FER is low and forward power decreases quickly.
THRSPWRDWN (Power Decrease Step)
[Description]
This parameter represents the step by which the power decreases when the
timer waiting for power control measurement report from MS. The smaller the
down step, the little possibility call drops caused by decrease power during the
power control.
[Type]
Algorithm parameter
[Range and unit]
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0~255 (unit: 0.25dB)
[Operating range]
0~255
[Recommended value]
2, namely, 0.5 dB
[Setting tradeoffs]
If the value of this parameter is set too large, the power will decrease greatly,
but the quick decrease may result in power waste. When the value is set too
small, the power will decrease a little, the slow decrease may result in power
waste instead of call drops.
PWRRPTTHRS (Power Control Reporting Threshold)
[Description]
This parameter represents the cooperation between measurement report
parameters. Refer to bad frame counter. If the received bad frames in the
period stipulated by the parameter PWRRPTFRMNUM exceed the threshold,
the MS will report the power measurement report message.
[Type]
Um interface parameter, used by the MS (SPM)
[Range and unit]
0~31 (unit: frame).
[Operating range]
0~31
[Recommended value]
2
[Setting tradeoffs]
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If the value of this parameter is set too large, the radio signal fading can not
be compensated to quickly in the threshold-based measurement report
power control mode, so a power control delay will occur. If the value is set
too small, the power measurement report message will frequently be
reported. In this case, too many signaling messages will affect the call
quality. If the value is set to “1”, the MS will report a power measurement
report message (PMRM) each time it receives a bad frame. If target FER is
1%, it is normal to receive one error frame within 100 frames. But if power
report threshold is set to 1, error frame is taken as power increase by
mistake. So good power control performance cannot be obtained.
PWRRPTFRMNUM (Power Control Reporting Frame Count)
[Description]
This parameter determines the power report measurement period Z = 5 × 2^
(PWRRPTFRMNUM /2) frames. In the period-based measurement report
power control mode, a PMRM will be reported each time the MS receives Z
frames. In the threshold-based measurement report power control mode, the
bad frames will also be measured each time the MS receives Z frames. If the
total bad frames out of Z frames do not reach the “power report threshold", bad
frames will be counted from "0” again in the next measurement period. If the
bad frames out of Z frames reach the “power report period threshold” before a
measurement period ends, a PMRM will be reported. In the meantime, a new
measurement period will start and the period length is still Z frames.
[Type]
Um interface parameter, used by the MS (SPM)
[Range and unit]
0~15, with the unit of frame, 0: FRAME5,1: FRAME7,2: FRAME10,3:
FRAME14,4: FRAME20,5: FRAME28,6: FRAME40,7: FRAME56,8:
FRAME80,9: FRAME113,10: FRAME160,11: FRAME226,12: FRAME320,13:
FRAME452,14: FRAME640, and 15: FRAME905.
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[Operating range]
0~15, drop-down list on the maintenance console is used to display the range
of value, and select the value directly.
[Recommended value]
9, namely, 113 frames
[Setting tradeoffs]
In the threshold-based measurement report power control mode, the value of
this parameter is only used as the measurement period. If the value is set
large, the number of re-measurements will be reduced. The calculated bad
frames will be more than the actual ones since the total measured frames are
smaller due to the segmentation of period.
If cycle mode is adopted, set the parameter based on target FER and
PWRRPTTHRS. For example, target FER is set to 1, and PWRRPTTHRS is
set to 2, the cycle must be about 200 frames. According to the formula, the
parameter is set to 11(226 frames). But this mode is not adopted in generally.
PWRTHREENABLE (Power Threshold Report Flag)
[Description]
This parameter is a measurement report power control parameter, indicating
whether the threshold-based measurement report power control mode is used.
Since the response is quick in the threshold-based measurement report power
control mode, this kind of power control mode is usually used.
[Type]
Um interface parameter, used by the MS (SPM)
[Range and unit]
0 or 1. 0 – Not used; 1 – Used.
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[Operating range]
0 or 1
[Recommended value]
1
[Setting tradeoffs]
None
PWRPERIODENABLE (Period Report Mode Flag)
[Description]
Measurement report power control will have a high performance if the
threshold-based measurement report power control is used.
[Type]
Um interface parameter, used by the MS (SPM)
[Range and unit]
0 or 1, 0 – Not used; 1– Used
[Operating range]
0 or 1
[Recommended value]
0, period-based measurement report power control is not used.
[Setting tradeoffs]
None
PWRPTDL (Power Report Delay)
[Description]
After reporting a PMRM, the MS will wait for a while to start the measurement
in the next measurement period. The value of this parameter determines how
many frames the MS waits for to start the next measurement period. The
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purpose of setting the time of the delayed measurement is to restart the
measurement of forward frames after the forward power control triggered by
the previous PMRM takes effect.
[Type]
Um interface, used by MS (SPM).
[Range and unit]
0~31 (unit: 4 frames)
[Operating range]
1~2
[Recommended value]
1
[Setting tradeoffs]
If the delay is set large, the probability of bad frames not being measured will
increase, so it is set to the minimum “1”, namely, 4 frames.
WAITMSPCRPTTIMER (Wait MS Power Control Measurement Report Timer Length)
[Description]
In the threshold-based measurement report power control mode, if the power
measurement report message reported by the MS fails to be received within
the timer length, the forward transmit power of the current forward traffic
channel will be reduced. The timer length parameter is configured in TIMER.
[Type]
Algorithm parameter, used by power control module in SPU
[Range and unit]
0~255 (unit: 1 second)
[Operating range]
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0~255
[Recommended value]
2, namely, 2 seconds
[Setting tradeoffs]
The smaller the timer length is, the quicker the power control is. In the
meantime, the mean square deviation will increase, too. But if the timer length
is set too large, the power control will become so slow that the radio signal
change might fail to be traced. As a result, call drops and power waste may be
caused.
FSCHFERRPT (FSCH FER Report Indication)
[Description]
This parameter indicates whether the MS reports the frame quality information
of the FSCH. If this parameter is set to “1”, the MS will record the total frames
and bad frames of FSCH. After a burst completes, the MS will report the frame
information of SCH via PMRM and also reset the counter. If the parameter is
set to “0”, the MS will not report any information of SCH.
[Type]
Um interface parameter, used by the MS (ESCAM)
[Range and unit]
0 or 1. 0 – Not report; 1– Report
[Operating range]
0 or 1
[Recommended value]
0
[Setting tradeoffs]
None
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3.5 Forward EIB Power Control Parameters (FEIBPC) [Command name] MOD FEIBPC (Base Station Controller Management\Configuration
Management\Algorithm Management\Modify Forward EIB Power Control
Parameter)
FWDCHMAXGAIN (F-TCH Max. Tx. Power)
[Description]
This parameter represents the maximum transmit power of the forward channel
in the EIB power control. The capacity and quality can well be balanced by
modifying the value of this parameter. Therefore, this parameter will be
determined according to the actual requirement.
[Type]
Algorithm parameter, used by power control modules of FMR
[Range and unit]
-255~0, with the unit of 0.25dB. For details, see section 3.1.3
[Operating range]
(Pilot channel gain -3dB) ~ Pilot channel gain
[Recommended value]
Pilot channel gain -3dB (PLTCHPWRGAIN – 12). For example, if the pilot
channel gain is -28, the value of this parameter is -40. The pilot gain is
recommend as -1dB.
[Setting tradeoffs]
This parameter is used to restrict the maximum transmit power of forward
channel to avoid a single traffic channel from occupying excessive forward
power resources as a result of the power control. Under severe environments,
if the value of this parameter is set too large, the call quality can still keep at a
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certain level, but the forward capacity will decrease. If the value is set too
small, the call quality will be greatly degraded or even call drops may occur,
but the forward capacity will relatively increase.
FWDCHMINGAIN (F-TCH Min Tx. Power)
[Description]
This parameter represents the minimum transmit power of the forward channel
in the EIB power control.
[Type]
Algorithm parameter, used by power control modules of FMR
[Range and unit]
-255~0, with the unit of 0.25dB. For details, see section 3.1.3
[Operating range]
(Pilot channel gain-15dB) ~ (pilot channel gain -- -9dB)
[Recommended value]
Pilot channel gain -9dB (PLTCHPWRGAIN - 36). If the pilot channel gain is -28,
the recommended value is -64. Pilot gain is recommend to -15dB that is -88.
[Setting tradeoffs]
Under good radio environments, if the value of this parameter is set large, the
improvement of call quality will not be very significant while the forward
capacity will decrease. If the value is set small, the change of call quality will
not be significant while the forward capacity will increase. Ensure that the
power can increase quickly when the radio environment becomes
deteriorated.
EIBTCNT (Timer Length After Bad Frame Received)
[Description]
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This parameter represents the counter length since a bad frame is received. If
another bad frame is received within the counter length, the forward power of
the BTS will remain unchanged. If a good frame is received within the counter
length, the forward power will decrease by a big step EIBDWNSTEP.
[Type]
Algorithm parameter, used by power control modules of FMR
[Range and unit]
0~255 (unit: frame)
[Operating range]
0~255
[Recommended value]
3, which should not be modified
[Setting tradeoffs]
Consider algorithm convergence when EIB algorithm parameter is modified.
The convergence: Under certain target FER, supposing actual FER of radio
link is up to target FER, down power and up power in a control period are off
tradeoff. If target FER is 1%, that is, 1 bad frame, 99 good frames, power
keeps balance after once power up and 99 times of power down.
EIBUPSTP (Power Up After Bad Frame Received)
[Description]
This parameter represents the power increase step when one bad frame is
received after many successive good frames.
[Type]
Algorithm parameter, used by power control modules of FMR
[Range and unit]
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0~255 (unit: 0.25dB)
[Operating range]
0~255
[Recommended value]
8, namely 2dB
[Setting tradeoffs]
If the EIB algorithm parameter needs to be modified, the algorithm
convergence should be taken into consideration. When the value of this
parameter is set large, the fading can be compensated quickly, but some
power will be wasted. When the value is set small, the transmit power can be
saved, but the call quality will be degraded.
EIBDWNSTPS (Power Down After Timer Reset to 0)
[Description]
This parameter represents the power decrease step when a good frame is
received. If continuous good frames are received, the number satisfies down
period and power down value calculated by FER and up step.
[Type]
Algorithm parameter, used by power control modules of FMR
[Range and unit]
0~255 (unit: 0.25dB)
[Operating range]
0~255
[Recommended value]
1, namely, 0.25dB, which should not be modified
[Setting tradeoffs]
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If the EIB algorithm parameter needs to be modified, the algorithm
convergence should be taken into consideration. The value of this parameter
is usually set to “1”.If the value is set larger than “1”, the power control will be
coarse but not fine.
EIBDWNSTPB (Power Down After Good Frame Received)
[Description]
This parameter represents the power down step when one good frame is
received after many successive bad frames within PWR_EIB_CNT.
[Type]
Algorithm parameter, used by power control modules of FMR
[Range and unit]
0~255 (unit: 0.25dB).
[Operating range]
0~255
[Recommended value]
2, namely, 0.5dB
[Setting tradeoffs]
A part of EIB algorithm parameter. Consider algorithm convergence during the
modification and modify many parameters at the same time.
3.6 Forward Fast Power Control Parameters (FFASTPC) [Command name] MOD FFASTPC (Base Station Controller Management\Configuration
Management\Algorithm Management\Modify Forward Fast Power Control
Parameter)
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FPWRSTEP (Forward Power Control Step)
[Description]
This parameter represents the power adjustment step in the forward fast power
control when the BTS receives a power control bit. The up and down power
adjustment steps adopt this step.
[Type]
Parameter of A3 interface and Abis interface, used by BTS
[Range and unit]
1~4 (unit: 0.25dB)
[Operating range]
1~2
[Recommended value]
2, namely, 0.5dB
[Setting tradeoffs]
If the value of this parameter is set too large, the power control will be so
coarse that some forward transmit power may be wasted. If the value is set
too small, the power control will be so slow that the power increase could not
compensate the fast fading.
IS95SCHGAIN1 (IS95 Forward Power Control Sub-channel Gain 1)
[Description]
This parameter represents the power gain of forward power control
sub-channel relative to the forward traffic channel in the case of no soft handoff
branches. The forward power control sub-channel consists of some bits
extracted from FCH or DCCH, and it is a part of the forward traffic channel. In
the case of no soft handoff branches, the power demand of both forward power
control sub-channel and the forward traffic channel is the same. In the soft
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handoff state, the service frame of the MS is the maximum ratio combination of
multi-path energies, but the power control sub-channel gain needs to be
demodulated individually on each branch. In this case, the power of the power
control sub-channel is required to be higher than the transmit power of the
traffic channel.
[Type]
Parameter of A3 interface and Abis interface, used by BTS. Also Um interface
parameter, used by MS (CAM)
[Range and unit]
0~127 (unit: 0.25dB).
[Operating range]
0~127
[Recommended value]
0, namely, 0dB
[Setting tradeoffs]
In the case of no soft handoff branches, the power of the forward power
control sub-channel is the same as that of the forward traffic channel
IS95SCHGAIN2 (IS95 Forward Power Control Sub-channel Gain 2)
[Description]
This parameter represents the transmit power relationship between the forward
power control sub-channel and the traffic channel in the case of two soft
handoff branches. For other descriptions, refer to IS95 forward power control
sub-channel gain 1
[Type]
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Parameter of A3 interface and Abis interface, used by BTS. Also Um interface
parameter, used by MS (CAM)
[Range and unit]
0~255 (unit: 0.25dB)
[Operating range]
0~127
[Recommended value]
12, namely, 3dB
[Setting tradeoffs]
None
IS95SCHGAIN3 (IS95 Forward Power Control Sub-channel Gain 3)
[Description]
This parameter represents the transmit power relationship between the forward
power control sub-channel and the traffic channel in the case of three or more
soft handoff branches. For other descriptions, refer to IS95 forward power
control sub-channel gain 1
[Type]
Parameter of A3 interface and Abis interface, used by BTS. Also Um interface
parameter, used by MS (CAM)
[Range and unit]
0~127 (unit 0.25dB)
[Operating range]
0~127
[Recommended value]
19, namely, 4.75dB
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[Setting tradeoffs]
None
IS2000SCHGAIN1 (IS2000 Forward Power Control Sub-channel Gain 1)
[Description]
The value of IS2000SCHGAIN1 is larger than that of IS95SCHGAIN1, because
the power of IS2000 forward traffic channel is usually lower than that of IS95
forward traffic channel. To ensure the correctness of the reverse power control
bit, the IS2000 forward power control sub-channel gain should be larger
accordingly.
[Type]
Parameter of A3 interface and Abis interface, used by BTS.. Also Um interface
parameter, used by MS (ECAM)..
[Range and unit]
0~31 (unit: 0.25dB)
[Operating range]
0~31
[Recommended value]
12, namely 3dB
[Setting tradeoffs]
None
IS2000SCHGAIN2 (IS2000 Forward Power Control Sub-channel Gain 2)
[Description]
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In IS2000, this parameter represents the transmit power relationship between
the forward power control sub-channel and the traffic channel in the case of two
soft handoff branches. For details, refer to IS95 forward power control
sub-channel gain 1
[Type]
Parameter of A3 interface and Abis interface, used by BTS.. Also Um interface
parameter, used by MS (ECAM)
[Range and unit]
0~31 (unit: 0.25dB)
[Operating range]
0~31
[Recommended value]
24, namely, 6dB
[Setting tradeoffs]
None
IS2000SCHGAIN3 (IS2000 Forward Power Control Sub-channel Gain 3)
[Description]
In IS2000, this parameter represents the transmit power relationship between
the forward power control sub-channel and the traffic channel in the case of
three or more soft handoff branches. For details, refer to IS95 forward power
control sub-channel gain 1
[Type]
Parameter of A3 interface and Abis interface, used by BTS.. Also Um interface
parameter, used by MS (ECAM)
[Range and unit]
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0~31 (unit: 0.25dB)
[Operating range]
0~31
[Recommended value]
31, namely, 7.75dB
[Setting tradeoffs]
None
VINITFCH (Voice Service FCH Initial Eb/Nt Value) DINITFCH (Data Service FCH Initial Eb/Nt Value)
[Description]
This parameter represents the initial value for the forward FCH out loop power
control in the MS. The forward out loop power control is similar to the reverse
out loop power control in principle. For the specific description of this parameter,
refer to VINITFCH. They are set based on voice and data service separately.
[Type]
Um interface parameter, used by MS (ECAM).
[Range and unit]
0~255 (unit: 0.125dB)
[Operating range]
0~255
[Recommended value]
40, namely, 5dB
[Setting tradeoffs]
None
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VMAXFCH (Voice Service FCH Max. Eb/Nt) DMAXFCH (Data Service FCH Max. Eb/Nt)
[Description]
This parameter represents the maximum set value of forward out loop FCH
Eb/Nt in the MS. They are set based on voice and data service separately.
[Type]
Um interface parameter, used by MS (ECAM).
[Range and unit]
0~255 (unit: 0.125dB)
[Operating range]
48~80
[Recommended value]
80, namely, 10dB, this parameter is set to 114 in earlier VR002B03D006.
[Setting tradeoffs]
If the value of this parameter is set large, it is favourable for the communication
quality to maintain at a certain level under severe radio environments, but the
power control overshoot may be so large that the forward capacity would
decrease. If the value is set small, the call quality will be greatly degraded or
even call drops may be caused.
VMINFCH (Voice Service FCH Mini. Eb/Nt Value) DMINFCH (Data service FCH Mini. Eb/Nt Value)
[Description]
This parameter represents the minimum set value of forward out loop FCH
Eb/Nt in the MS. Refer to the [Description] in the max. set value of voice/data
service FCH EbNt. They are set based on voice and data service separately.
[Type]
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Um interface parameter, used by MS (ECAM).
[Range and unit]
0~255 (unit: 0.125dB)
[Operating range]
16~24
[Recommended value]
16, namely, 2dB
[Setting tradeoffs]
Under good radio environments, if the value of this parameter is set large, the
improvement of call quality will not be very significant, but the forward capacity
will decrease.
INITDCCH (DCCH Initial Eb/Nt Value) MAXDCCH (DCCH Max. Eb/Nt Value) MINDCCH (DCCH Min. Eb/Nt Value) [Description] Refer to FCH set value.
INITSCH1X (1X SCH Initial Eb/Nt Value Offset Relative to FCH) INITSCH2X (2X SCH Initial Eb/Nt Value Offset Relative to FCH) INITSCH4X (4X SCH Initial Eb/Nt Value Offset Relative to FCH) INITSCH8X (8X SCH Initial Eb/Nt Value Offset Relative to FCH) INITSCH16X (16X SCH Initial Eb/Nt Value Offset Relative to FCH) INITSCH32X (32X SCH Initial Eb/Nt Value OffsetRelative to FCH)
[Description]
The group of above parameters is used to calculate the initial value of the
forward out loop SCH EbNt in the MS. This initial value equals the set value of
the current SCH EbNt plus the value of this parameter, that is, the initial set
value of SCH EbNt offset value to FCH is a relative value. The advantage of
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this representation is that the initial set value of SCH EbNt can be obtained
accurately according to the link state of the current FCH so that the set value of
the out loop SCH can be optimized quickly.
[Type]
Um interface parameter, used by MS (ECAM).
[Range and unit]
-128 ~ 127, (unit: 0.125dB).
[Operating range]
-128 ~ 127
[Recommended value]
24, namely, 3dB
[Setting tradeoffs]
None
MAXSCH1X (1X SCH Max. Eb/Nt Value) MAXSCH2X (2X SCH Max. Eb/Nt Value) MAXSCH4X (4X SCH Max. Eb/Nt Value) MAXSCH8X (8X SCH Max. Eb/Nt Value) MAXSCH16X (16X SCH Max. Eb/Nt Value) MAXSCH32X (32X SCH Max. Eb/Nt Value)
[Description]
Refer to max. set value of FCH EbNt (FWDMAXFCH).
[Type]
Um interface parameter, used by MS (ECAM).
[Range and unit]
0~255 (unit: 0.125dB)
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[Operating range]
0~255
[Recommended value]
The specific recommended values are shown the table:
Rate Recommended value 1x 80
2x 80
4x 80
8x 88
16x 96
32x 96
[Setting tradeoffs]
None
MINSCH1X (1x SCH Mini. Eb/Nt value) MINSCH2X (2x SCH Mini. Eb/Nt Value) MINSCH4X (4x SCH Mini. Eb/Nt Value) MINSCH8X (8x SCH Mini. Eb/Nt Value) MINSCH16X (16x SCH Mini. Eb/Nt Value) MINSCH32X (32x SCH Mini. Eb/Nt Value)
[Description]
Refer to min. set value of FCH EbNt ((FWDMINFCH).
[Type]
Um interface parameter, used by MS (ECAM).
[Range and unit]
0~255 (unit: 0.125dB)
[Operating range]
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0~255
[Recommended value]
16, namely, 2dB
[Setting tradeoffs]
None
VFCHINITGAINFIX (Voice Service Forward FCH Initial Power Correction Value) DFCHINITGAINFIX (Data Service Forward FCH Initial Power Correction Value)
[Description]
This parameter provides a correction value for the calculated initial transmit
power. They are set based on voice and data service separately.
[Type]
Algorithm parameter
[Range and unit]
0~255 (unit: 0.25dB).
[Operating range]
0 ~ 16
[Recommended value]
16
[Setting tradeoffs]
If the value of this parameter is set large, the call quality can be ensured when
the call is established, but the calculated initial transmit power must be lower
than the maximum transmit power.
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COUNTOFGAINRPAIRS (Number of Power Gain Pairs) [Description] This parameter is not used currently. 3 pairs of maximum gain and
minimum gain are specified in the protocol.
VFCHMAXGAINRO1 (Voice Service FCH Max. Gain 1) DFCHMAXGAINRO1 (Data Service FCH Max. Gain 1)
[Description]
This parameter represents the maximum transmit power of the forward traffic
channel when the call is not in the soft handoff state. For representation, refer
to section 3.1.3. They are set based on voice and data service.
[Type]
Parameter of A3 interface and Abis interface, used by BTS..
[Range and unit]
-255~0 (unit: 0.25dB).
[Operating range]
(Pilot channel gain - 5dB) ~ (pilot channel gain - 2dB)
[Recommended value]
Pilot channel gain - 3dB, that is, pilot gain= -28, this value is set to - 40. If the
pilot channel gain – 4dB, that is, pilot gain = - 28, the recommended value is
-44.
[Setting tradeoffs]
Under severe radio environments, if the value of this parameter is set large, the
call quality can maintain at a certain level, but the forward capacity would
decrease. If the value is set too small, the call quality will be greatly degraded
or even call drops may be caused.
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VFCHMINGAINR1 (Voice Service FCH Mini. Gain 1) DFCHMINGAINR1 (Data Service FCH Mini. Gain 1)
[Description]
This parameter represents the minimum transmit power of the forward traffic
channel when the call is not in the soft handoff state. For the representation,
see section 3.1.3. They are set based on voice and data service.
[Type]
Parameter of A3 interface and Abis interface, used by BTS..
[Range and unit]
-255~0 (unit: 0.25dB). Refer to section 3.1.3
[Operating range]
(Pilot channel gain - 24dB) ~ (pilot channel gain - 10dB)
[Recommended value]
Pilot channel gain – 17dB. If pilot gain is -28, this value is set to -96. For
example, pilot gain – 24dB, that is, if the pilot channel gain is -28, the
recommended value is -124.
[Setting tradeoffs]
Under good radio environments, if the value of this parameter is set small, the
call quality will not be degraded much while the forward capacity will greatly
increase. On the contrary, if the value is set large, the call quality will not be
improved much while the system capacity will greatly decrease.
VFCHMAXGAINR2 (Voice Service FCH Max. Gain 2) DFCHMAXGAINR2 (Data Service FCH Max. Gain 2)
[Description]
This parameter represents the minimum transmit power of the forward traffic
channel in the case of two soft handoff branches. Refer to voice/data service
max. gain of FCH 1. They are set based on voice and data service separately.
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[Type]
Parameter of A3 interface and Abis interface, used by BTS..
[Range and unit]
-255~0 (unit: 0.25dB). See section 3.1.3
[Operating range]
(Pilot channel gain-24dB) ~ (pilot channel gain - 10dB)
[Recommended value]
Pilot channel gain - 3dB. For example, if the pilot channel gain is -28, the
recommended value is -40. Refer to “voice/data max. gain of FCH 1”
[Setting tradeoffs]
Refer to voice/data service min. gain of FCH 1.
VFCHMINGAINR2 (Voice Service FCH Mini. Gain 2)
DFCHMINGAINRO2 (Data Service FCH Mini. Gain 2)
[Description]
This parameter represents the minimum transmit power of the forward traffic
channel in the case of two soft handoff branches. Refer to voice/data service
max. gain of FCH 1. They are set based on voice and data service separately.
[Range and unit]
-255~0 (unit: 0.25dB). See section 3.1.3
[Operating range]
(Pilot channel gain-24dB) ~ (pilot channel gain - 10dB)
[Recommended value]
Pilot channel gain - 17dB. If pilot gain is -28, this value is set to -96. For
example, pilot gain - 24dB, that is, if the pilot channel gain is -28, the
recommended value is -124.
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[Setting tradeoffs]
Refer to voice/data service mini. gain of FCH 1.
VFCHMAXGAINR3 (Voice Service FCH Max. Gain 3) DFCHMAXGAINR3 (Data Service FCH Max. Gain 3)
[Description]
This parameter represents the maximum transmit power of the forward traffic
channel in the case of three or more soft handoff branches. Refer to voice/data
service max. gain of FCH 1. They are set based on voice and data service.
[Range and unit]
-255~0 (unit: 0.25dB). See section 3.1.3.
[Operating range]
(Pilot channel gain - 5dB) ~ (pilot channel gain - 2dB)
[Recommended value]
Pilot channel gain -3dB. For example, if the pilot channel gain is -28, the
recommended value is -40.
[Setting tradeoffs]
Refer to voice/data service max. gain of FCH 1.
VFCHMINGAINR3 (Voice Service FCH Mini. Gain 3) DFCHMINGAINR3 (Data Service FCH Mini. Gain 3)
[Description]
This parameter represents the minimum transmit power of the forward traffic
channel in the case of three or more soft handoff branches. Refer to voice/data
service max. gain of FCH 1. They are set based on voice and data service.
[Range and unit]
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-255~0 (unit: 0.25dB). See section 3.1.3.
[Operating range]
(Pilot channel gain-24dB) ~ (pilot channel gain - 10dB)
[Recommended value]
Pilot channel gain - 17dB. If pilot gain is -28, this value is set to -96. For
example, pilot gain - 24dB, that is, if the pilot channel gain is -28, the
recommended value is -124.
[Setting tradeoffs]
Refer to voice/data service mini. gain of FCH 1.
SCHINITGAIN1X (1X F-SCH Initial Tx. Gain) SCHINITGAIN2X (2X F-SCH Initial Tx. Gain) SCHINITGAIN4X (4X F-SCH Initial Tx. Gain) SCHINITGAIN8X (8X F-SCH Initial Tx. Gain) SCHINITGAIN16X (16X F-SCH Initial Tx. Gain) SCHINITGAIN32X (32X F-SCH Initial Tx. Gain)
[Description]
The parameters represent the initial transmit power in the forward fast power
control mode. For the representation of parameters, refer to 3.1.3. The
representation of R03 is different. In capacity test, set appropriately a small
forward initial transmit power to ensure the capacity.
[Type]
Parameter of A3 interface, used by BTS
[Range and unit]
-255~0 (unit: 0.25dB). See section 3.1.3.
[Operating range]
-255~0.
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[Recommended value]
When pilot channel gain= -28, the specific recommended values are shown in
the following table:
Rate Recommended value
1x -44
2x -44
4x -44
8x -32
16x -32
32x -28
[Setting tradeoffs]
The above parameters represent the initial transmit power of forward traffic
channel of IS2000 MS. When the IS2000 MS uses the forward fast power
control, the initial transmit power equals the maximum transmit power, and the
initial transmit power can drop quickly, too.
ENRC4TORC3 (Eb/Nt Offset of Forward RC4 to RC3)
[Description]
This parameter represents different offsets, which the BSC adds to the forward
out loop set values (initial value, maximum and minimum) according to different
RCs before delivering these values to the MS. the settings of all forward out
loop set values in the forward fast power control parameters table are set
based on RC3.
[Type]
Algorithm parameter
[Range and unit]
0~255 (unit: 0.125dB)
[Operating range]
0~255
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[Recommended value]
2, namely, 0.25dB
[Setting tradeoffs]
None
ENRC5TORC3 (Eb/Nt Offset of Forward RC5 to RC3)
[Description]
Refer to EB/NT Offset of Forward RC4 to RC3
[Type]
Algorithm parameter
[Range and unit]
0~255 (unit: 0.125dB)
[Operating range]
0~255
[Recommended value]
2
[Setting tradeoffs]
None
FWDSCHMAXGAIN1X (1x F-SCH Max. Tx Power) FWDSCHMAXGAIN2X (2x F-SCH Max. Tx Power) FWDSCHMAXGAIN4X (4x F-SCH Max. Tx Power) FWDSCHMAXGAIN8X (8x F-SCH Max. Tx Power) FWDSCHMAXGAIN16X (16x F-SCH Max. Tx Power) FWDSCHMAXGAIN32X (32x F-SCH Max. Tx Power) [Description]
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In the R03 version, set separately power control parameter of SCH with
different rates to implement the control with different rates. This parameter
represents the maximum transmit power of SCH with different rates in the
forward fast power control. For representation, see section 3.1.3.
[Type] ABIS interface, used by the BTS..
[Range and unit] -255~0, with the unit of 0.25dB. See section 3.1.3.
[Operating range] -255~0.
[Recommended value] When pilot channel gain= -28, the recommended value are specified in the
following table:
Rate Recommended value
1x -44
2x -44
4x -36
8x -32
16x -24
32x -20
[Setting tradeoff] For setting of channel power gain, consider the relationship between capacity
and power source. The increase of power follows with that of interference.
FWDSCHMINGAIN1X (1x F-SCH Mini. Tx Power) FWDSCHMINGAIN2X (2x F-SCH Mini. Tx Power) FWDSCHMINGAIN4X (4x F-SCH Mini. Tx Power) FWDSCHMINGAIN8X (8x F-SCH Mini. Tx Power) FWDSCHMINGAIN16X (16x F-SCH Mini. Tx Power) FWDSCHMINGAIN32X (32x F-SCH Mini. Tx Power) [Description]
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This parameter represents the minimum transmit power of SCH with different
rates in the forward fast power control. For representation, see section 3.1.3.
[Type] ABIS interface parameter, used by the BTS.
[Range and unit] -255~0, with the unit of 0.25dB. See section 3.1.3.
[Operating range] -255~0.
[Recommended value] When pilot channel gain =-28, the recommended values are specified in the
following table:
Rate Recommended value
1x -80
2x -76
4x -72
8x -64
16x -52
32x -52
[Setting tradeoff] For setting of channel power gain, consider the relationship between capacity
and power source. The increase of power follows with that of interference.
3.7 Target FER (FER)
[Command name]
MOD FER (Base Station Controller Management\Configuration
Management\Algorithm Configuration ------Modify Target FER
Configuration)
For the representation of the FER, refer to 3.1.3.
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FWDVCFER1 (F-FCH Voice Service Expected FER1)
[Description]
This parameter represents the target FER of forward FCH of voice call. For the
IS95 MS, the forward power control is the measurement report power control or
EIB power.
For the IS2000 MS, the forward power control is the fast power control. This
parameter is sent to the MS via the channel assignment message to determine
the forward out loop set value so that the actual FER can converge at the target
FER.
[Type]
IS95, algorithm parameter, used by SPU or FMR power control module;
IS200, Um interface parameter, used by MS..
[Range and unit]
0~30
[Operating range]
0~10, namely, 1% ~5%
[Recommended value]
2, namely, 1%
[Setting tradeoffs]
If the forward target FER is set small, the quality of forward link through the
forward power control should be high and the required forward power should
be high. Vice versa. In usual cases, the forward FER is set to 1% ~ 3% and
there is no great difference in the forward call quality. To save the forward
power and increase the forward capacity, the value of this parameter can be
set large properly.
REVVCFCHFER1 (R-FCH Voice Service Expected FER1)
[Description]
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This parameter represents the target FER of reverse FCH of voice call. This
parameter is used by the power control module of FMR to calculate the reverse
out loop set value so that the actual FER converge at the target FER.
[Type]
Algorithm parameter, used by the power control module of FMR..
[Range and unit]
0~30
[Operating range]
0~10, namely, 1% ~ 5%
[Recommended value]
2
[Setting tradeoffs]
If the reverse target FER is set small, the quality of reverse link via the reverse
power control should be high and the required reverse power should be high.
Vice versa. In usual cases, the forward FER is set to 1% ~ 3% and there is no
great difference in the call quality. To save the MS power and increase the
reverse capacity, the value of this parameter can be set large properly.
FWDVCDCCHFER1 (F-DCCH Voice Service Expected FER1) REVVCDCCHFER1 (R-DCCH Voice Service Expected FER1) [Description] Refer to F/R-FCH Voice Service Expected FER1.
FWDDATFCHFER1 (F-FCH Data Service Expected FER1)
[Description]
Refer to FWDVCFCHFER1. This parameter is designated for data service
calls.
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[Type]
IS95, algorithm, used by power control modules of SPU or FMR;
IS200, Um interface, used by MS
[Range and unit]
0~30
[Operating range]
0~10, namely 1%~5%
[Recommended value]
2, namely, 1% (No matter whether voice service or data service, signalling
messages will be transferred on FCH, so the target FER can not be too high.)
[Setting tradeoffs]
Refer to FWDVCFCHFER1.
REVDATFCHFER1 (R-FCH Data Service Expected FER1)
[Description]
Refer to REVVCFCHFER1. This parameter is designated for data service calls.
[Type]
Algorithm parameter, used by power control module of FMR
[Range and unit]
0~30
[Operating range]
0~10, namely 1%~5%
[Recommended value]
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2, namely, 1% (No matter whether voice service or data service, signalling
messages will be transferred on FCH, so the target FER can not be too high.)
[Setting tradeoffs]
Refer to REVVCFCHFER1.
FWDDATDCCHFER1 (Forward DCCH Data Service Expected FER1) REVDATDCCHFER1 (Reverse DCCH Data Service Expected FER1) [Description] Refer to forward/reverse FCH expected FER1 of data service. FWDDATSCHFER1X (Forward 1X SCH Target FER) FWDDATSCHFER2X (Forward 2X SCH Target FER) FWDDATSCHFER4X (Forward 4X SCH Target FER) FWDDATSCHFER8X (Forward 8X SCH Target FER) FWDDATSCHFER16X (Forward 16X SCH Target FER)
FWDDATSCHFER32X (Forward 32X SCH Target FER)
[Description]
The above parameters represent the target FERs of the forward SCH with
different rates. In the forward fast power control, this parameter is sent to the
MS through the SCH assignment message to determine the set value of
forward out loop SCH so that the actual FER can converge at the target FER.
[Type]
Um interface, used by MS
[Range and unit]
0~31
[Operating range]
0~10, namely, 1%~5%
[Recommended value]
If this value is set to 10, namely, 5%, as shown the following table
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Rate Recommended value 1x 2
2x 4
4x 4
8x 6
16x 6
32x 10
[Setting tradeoffs]
If the reverse target FER is set small, the quality of reverse link via the reverse
power control should be high and the required reverse power should be high.
Vice versa. Target FER of SCH is higher than that of FCH because the
real-time of voice service is higher than that of data service and the error code
can be corrected through the resending in the data service. High-voice SCH
requires high power and lower FER will waste more power. But the maximum
target FER should not be more than 15%.
REVDATSCHFER1X (Reverse 1X SCH Target FER) REVDATSCHFER2X (Reverse 2X SCH Target FER) REVDATSCHFER4X (Reverse 4X SCH Target FER) REVDATSCHFER8X (Reverse 8X SCH Target FER) REVDATSCHFER16X (Reverse 16X SCH Target FER) REVDATSCHFER32X (reverse 32X SCH Target FER) [Description]
The above parameters represent the target FERs of the forward SCH with
different rates. In the reverse closed loop power control, this parameter is sent
to the MS through the SCH assignment message to determine the set value of
reverse out loop SCH so that the actual FER can converge at the target FER.
[Type]
Um interface, used by MS
[Range and unit] 0~30
[Operating range]
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0~10, namely, 1%~5%
[Recommended value] If this value is set to 10, namely, 5%, as shown the following table
Rate Recommended value 1x 2
2x 4
4x 4
8x 6
16x 6
32x 10
[Setting tradeoff] If the reverse target FER is set small, the quality of reverse link through the
reverse power control should be high and the required reverse power should
be high. Vice versa. To save the MS power and increase the reverse capacity,
the value of this parameter can be set large properly, with the maximum of
15%.
4. Handoff Parameters
4.1 Module Handoff Parameter (MHOPARA) [Command Name] MOD BSCHO (Base Station controller Management \ Configuration
Management \ Algorithm Configuration \ Modify Inter-BSC Handoff
Parameters)
LST BSCHO (Base Station controller Management \ Configuration
Management \ Algorithm Configuration \ Query Inter-BSC Handoff
Parameters)
This table configures module handoff parameters and the parameters are the
same for each carrier of the whole BSC.
MAXSHO (Max Number of SHO Branches)
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[Description]
This parameter represents the maximum number of branches in the target
active set. According to the protocol, the active set of the MS supports a
maximum of 6 soft handoff branches. When the BSC makes a soft handoff
decision, it will, according to this parameter, restrict the number of branches in
the target active set of the soft handoff.
[Type]
Algorithm parameter
[Range and unit]
2~6
[Operating range]
3~6
[Recommended value]
3
[Setting tradeoffs:]
If the value is set too large, the soft handoff ratio will increase and more
forward resources will be occupied, so the forward capacity will be wasted. If
the value is set too small, the soft handoff ratio will decrease, but the soft
handoff gain can not be rationally utilized, so the quality of service will be
degraded. If system traffic is less, but resources are rich, to enhance QoS and
lower call drop ratio, set this parameter to 4.
INTRABSCHHOSW (Intra-BSC HHO Macro Diversity Switch)
[Description]
This parameter indicates whether the macro diversity function of intra-BSC
hard handoff is enabled or not when an intra-BSC hard handoff is performed.
[Type]
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Algorithm parameter
[Range and unit]
0~1. 0-OFF, 1-ON
[Operating range]
0~1
[Recommended value]
1
[Setting tradeoffs:]
When the macro diversity function of intra-BSC hard handoff is enabled, the MS
can simultaneously perform hard handoffs to multiple target carriers. In this way,
it is helpful to utilize the soft handoff gain in time and improve the hard handoff
success ratio. However, if too many hard handoff target carriers are configured,
excessive resources may be occupied transiently.
INTERBSCHHOSW (Inter-BSC HHO Macro Diversity Switch)
[Description]
This parameter indicates whether the macro diversity function of inter-BSC
hard handoff is enabled or not when an inter-BSC hard handoff is performed.
[Type]
Algorithm parameter
[Range and unit]
0~1. 0-OFF, 1-ON
[Operating range]
0~1
Recommended value:
0
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[Setting tradeoffs:]
When the macro diversity function of inter-BSC hard handoff is enabled, the MS
can simultaneously perform hard handoffs to multiple target carriers. In this way,
it is helpful to utilize the soft handoff gain in time and improve the hard handoff
success ratio. However, if too many hard handoff target carriers are configured,
excessive resources may be occupied transiently.
HHOMAXTARGNUM (Max Number of HHO Branches)
[Description]
This parameter represents the maximum number of branches in the target
active set of hard handoff when the macro diversity function of hard handoff is
enabled, According to the protocol, the active set of the MS supports a
maximum of 6 hard handoff branches.
[Type]
Algorithm parameter
[Range and unit]
1~6
[Operating range]
1~6
[Recommended value]
6
Setting tradeoffs:
If only the hard handoff algorithms through which the strength of the target pilot
of hard handoff can be measured (such as same-frequency hard handoff
algorithm, mobile assisted hard handoff algorithm and pilot beacon hard
handoff algorithm) are used, the target of hard handoff is accurate since the
strength of the target pilot is known. The value of this parameter is
recommended to be set to “3”, consistent with the recommended value of the
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Max Number of SHO Branches. If the hard handoff algorithms (such as
handdown hard handoff algorithm and direct hard handoff algorithm) through
which the strength of the target pilot of hard handoff can not be measured, the
target of hard handoff may be inaccurate since the strength of the target pilot is
unknown and is obtained from the data configuration. Therefore, the value of
this parameter can be set large to increase the hard handoff success ratio.
MAHHOSW (MAHHO Switch)
[Description]
This parameter indicates whether the mobile assisted hard handoff function is
enabled or not when a mobile station which supports IS95B above performs the
different-frequency hard handoff. According to the protocol, only the MS
supporting IS95B above can search different frequencies in conversation.
[Type]
Algorithm parameter
[Range and unit]
0~1. 0-OFF, 1-ON
[Operating range]
0~1
[Recommended value]
0
[Setting tradeoffs:]
When the MS supporting IS95B above performs the different-frequency hard
handoff, the MS can use the mobile assisted hard handoff algorithm without
configuration of any new hardware. The MS can automatically measure the
strength of the target pilot of different-frequency hard handoff. The target of
hard handoff is accurate and the success ratio is high. However, when the MS
measures the strength of target pilot of different-frequency hard handoff, it will
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interrupt the communication of the serving frequency. As a result, the call
quality will be degraded. The mobile assisted hard handoff algorithm is usually
recommended when the MS supporting IS95B above performs the
different-frequency hard handoff.
BEACONSW (Pilot Beacon HHO Switch)
[Description]
This parameter indicates whether the pilot beacon hard handoff function is
enabled or not.
[Type]
Algorithm parameter
[Range and unit]
0~1. 0-OFF, 1-ON
[Operating range]
0~1
[Recommended value]
0
[Setting tradeoffs:]
If the pilot beacon hard handoff algorithm is used to perform different-frequency
hard handoff, pilot beacon hardware should specially be configured.
Consequently, network cost increases. If pilot beacon is added, interference to
the system increases.
When pilot beacon hard handoff function is enabled, the coverage of pilot
beacon should also be consistent with the coverage of corresponding true
pilot. When pilot beacon is used to perform different-frequency hard handoff,
the MS 95A also can search different-frequency signal strength. It is
applicable to the MS of each type, with high success ratio.
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PLTPOLLMINNUM (Branch Number at Pilot Pollution)
[Description]
Only when the number of pilots whose strength is larger than T_ADD in PSMM
is equal to or greater than the value of this parameter, can we say have pilot
pollution. This parameter is one condition which is used to judge whether the
pilot pollution exists in the system.
[Type]
Algorithm parameter
[Range and unit]
4~6
[Operating range]
4~6
[Recommended value]
6
[Setting tradeoffs:]
If the value of this parameter is set too large, the pilot pollution decision
threshold of the system judges will increase. Otherwise, the threshold will
decrease.
PLTRTHRS (Relative Threshold at Pilot Pollution)
[Description]
Only when the strength difference between the strongest pilot and the second
strongest pilot in PSMM is less than or equal to the value of this parameter, can
we say have pilot pollution. This parameter is another condition which is used
to judge whether the pilot pollution exists in the system.
[Type]
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Algorithm parameter
[Range and unit]
0~63 (unit: -0.5dB), corresponding to 0~-31.5dB.
[Operating range]
0~28
[Recommended value]
4
[Setting tradeoffs:]
If the value of this parameter is set too large, the threshold by which the system
judges pilot pollution will decrease. Otherwise, the threshold will increase.
MAXDIST (Max Distance between Neighbor Cell and Serving Cell)
[Description]
This parameter is one of BSC parameters detecting the absent configuration of
neighbour cell. The MS reports the detected PN to the BSC via PSMM or
CFSRPM. If the PN does not exists in the active set, nor in the neighbor set,
the BSC will search the corresponding target cell of the PN among cells whose
distances from the serving cell of the MS are less than the value of this
parameter.
[Type]
Algorithm parameter
[Range and unit]
0--65535 (unit: 100m)
[Operating range]
0--1000
[Recommended value]
100
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[Setting tradeoff]
If the cell radius in the network is large, the value of this parameter can be set
large. Otherwise, the value can be set small.
MAXCONFAILTIMES (Max Number of Successive HO Failures to Start Penalty)
[Description]
This parameter is one of BSC parameters punishing handoffs. The soft handoff
request successively originated to a carrier and fail, cause is the radio resource
request failure or the failure of establishment of terrestrial resource. If a soft
handoff request originated to a carrier fails because of the radio resource
request failure or the failure of establishment of terrestrial resource, the soft
handoff request will be successively originated to the carrier (因果关系反
了).When the number of successive failures exceeds the value of this
parameter, any soft handoff will be prohibited in this carrier when the BSC
makes the soft handoff decision within a period of time.
[Type]
Algorithm parameter
[Range and unit]
1~5
[Operating range]
1~5
[Recommended value]
3
[Setting tradeoffs:]
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If the value of this parameter is set too large, the start handoff Penalty threshold
will increase. Otherwise, the threshold will decrease.
4.2 Handoff Parameters (HOPARA) [Command Name] MOD HO (Base Station controller Management \ Configuration Management \
Algorithm Configuration \ Modify HandOff Parameters)
SRCHWINA (Search Window Size for the Active Set and Candidate Set)
[Description]
This parameter defines the size of the search window used when the MS
searches pilots in the active and candidate sets. The MS searches these pilots,
with their first arriving available multi-paths as their search centres, respectively.
This parameter is only dependent on the multi-paths of pilots, but independent
of the relative propagation delay between pilots.
[Type]
Um interface parameter (SPM/ESPM/ITSPM and EHDM/GHDM/UHDM)
[Range and unit]
0~15 (For details, refer to Table 4-1)
Table 4-1 Search window size
[Operating range]
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5~9 (20~80chips)
[Recommended value]
5 (20chips)
[Setting tradeoffs:]
According to the local propagation delay, the pilot signals after the propagation
delay should all fall into the search window of the active set. If the value of this
parameter is set too small, some useful signals in the active set may fall
beyond the search window. These signals beyond the search window will
cause interference, so the link quality may be affected greatly. If the value of
this parameter is set too large, some useless signals may fall into the search
window, so the link quality may also be affected. A large search window will
also make the MS search neighbor pilots so slowly that the handoff could not
be triggered in time. Thus the system performance decreases.
SRCHWINN (Search Window Size for the Neighbour Set)
[Description]
This parameter defines the size of the search window used when the MS
searches pilots in the neighbor set. The MS searches pilots in the neighbor set,
with the first arriving available multi-paths of the reference pilot as the time
reference, and PN offset of neighbor pilot as the search centre. Therefore, this
parameter is not only related to the multi-paths of neighbor pilots, but also their
propagation delay relative to the reference pilot.
[Type]
Um interface parameter (SPM/ESPM/ITSPM and GHDM/UHDM)
[Range and unit]
0~15 (For details, refer to Table 4-1)
[Operating range]
8~11
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[Recommended value]
8 (60chips)
[Setting tradeoffs:]
The value of this parameter should be set according to the multi-paths of
neighbor pilots and their propagation delay relative to the reference pilot to
ensure all neighbor pilot signals fall into the search window of the neighbor set.
The time reference of the search window is the first arriving multi-path of the
reference pilot and the search centre is the PN offset of neighbor pilots. If the
value of this parameter is set too small, the neighbor pilot signals may fall
beyond the search window. Some neighbor pilots may be missed and can not
be added to the active set. As a result, the soft handoff can not be triggered
normally, resulting in a call drop. If the value of this parameter is set too large,
the time that the MS searches each neighbor pilot may increase. Further, the
search of neighbor pilots will slow down. As a result, the soft handoff may be
delayed and the handoff performance will be affected potentially.
SRCHWINR (Search Window Size for the Remaining Set)
[Description]
This parameter defines the size of the search window used when the MS
searches pilots in the remaining set. The MS searches pilots in the remaining
set in the way it searches pilots in the neighbor set, with the first arriving
available multi-path of the reference pilot as the time reference, and PN offsets
of pilots in the remaining set as the search centre.
[Type]
Um interface parameter (SPM/ESPM/ITSPM and GHDM/UHDM)
[Range and unit]
0~15 (For details, refer to Table 4-1)
[Operating range]
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9~12
[Recommended value]
9 (80chips)
[Setting tradeoffs:]
If the value of this parameter is set too small, some useful pilots in the
remaining set may be missed. As a result, the function of BSC detecting the
absent configuration of neighbour cell can not be utilized to the full. If the value
of this parameter is set too large, the MS may search other irrelevant signals,
and besides, the time that the MS searches pilots in the remaining set will
increase, so the search speed of the MS will slow down.
NGBRMAXAGE (Neighbour Set Max AGE)
[Description]
This parameter defines the maximum duration of life of pilots in the neighbour
set. The MS provides a counter for each pilot in the neighbour set. When the
MS receives the Neighbour List Update Message (NLUM), it will increase the
counters of the original pilots in the neighbour set by one. If the counter of a
pilot exceeds the value of this parameter, the MS will remove this pilot from the
neighbor set. If the value of this parameter is set to “0’, each time the MS
receives NLUM, the MS will remove all pilots in the original neighbor set so that
the MS will use the contents in the latest NLUM. If the value is set to “2”, when
a pilot falls from the active set or candidate set back to the neighbor set but
there is no such pilot in two successive NLUMs, this pilot will be removed from
the neighbour set.
[Type]
Um interface parameter (SPM/ESPM/ITSPM).
[Range and unit]
0~15
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[Operating range]
0~3
[Recommended value]
0
[Setting tradeoffs:]
If the value of this parameter is set too large, a pilot which falls from the active
set or candidate set back to the neighbor set can stay a longer time, so it is
possible that new neighbor pilots in the NLUM will be excluded from the
neighbor set of the MS (when the number of pilots exceeds the maximum of
pilots in the neighbor set of the MS).If the value is set to "0”, each time the MS
receives the NLUM, the MS will completely use the neighbor pilot list in the
NLUM as a new pilot set.
TADD (Pilot Good_Available Threshold)
[Description]
This parameter defines when the MS shifts a pilot from the neighbor set to the
candidate set and sends the Pilot Strength Measurement Message (PSMM) to
the BSC. Only when the strength of a neighbor pilot exceeds the value of this
parameter, can it be added to the active set. Both the MS and BSC use this
parameter.
[Type]
Um interface parameter (SPM/ESPM/ITSPM and EHDM/GHDM/UHDM)
[Range and unit]
-630~0 (unit: -0.5dB
[Operating range]
-24~-28
[Recommended value]
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-28
[Setting tradeoffs:]
If the value of this parameter is set too large (such as more than -24), the soft
handoff threshold will increase, so the soft handoff area and the soft handoff
ratio will decrease. But some areas may be not covered. Since the soft handoff
gain can not be fully utilized, call drops may occur. If the value is set too small
(such as less than -28), the soft handoff threshold will decrease, so the soft
handoff area and the soft handoff ratio will increase. As a result, more forward
channels will be occupied and the forward capacity will decrease.
TDROP (Pilot Mini. Available Threshold)
[Description]
If the signal strength of a pilot in the active set or candidate set is lower than
the value of this parameter, the MS will start the handoff removal timer for the
pilot (Refer to T_TDROP).
[Type]
Um interface parameter (SPM/ESPM/ITSPM and EHDM/GHDM/UHDM)
[Range and unit]
-63~0 (unit: -0.5dB)
[Operating range]
-28~-32
[Recommended value]
-32
[Setting tradeoffs:]
If the parameter is set to a too large value (such as more than -28), the soft
handoff threshold is very high, so an available signal is quickly removed from
the active set. This available signal may cause interference after it is removed
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from the active set, resulting in call drops. If the value is set too small (such as
less than -32), the soft handoff threshold will decrease, so it is difficult to
remove a pilot from the active set. As a result, the soft handoff ratio will
increase and the forward capacity will be wasted.
TTDROP (Pilot Removal Timer Length)
[Description]
If the signal strength of a pilot in the active set or candidate set is lower than
the value of the parameter T_DROP, the MS will start the handoff removal timer
for the pilot (Refer to T_DROP).If the signal strength of the pilot exceeds the
value of the parameter T_DROP, the MS will reset and close the timer. When
the handoff removal timer for a pilot in the candidate set expires, the MS will
automatically shift the pilot to the neighbor set. When the handoff removal timer
for a pilot in the active set expires, the MS will report a Pilot Strength
Measurement Message (PSMM) to the BSC to the BSC, reminding it of
removing the pilot.
[Type]
Um interface parameter (SPM/ESPM/ITSPM and EHDM/GHDM/UHDM)
[Range and unit]
0~7. Table 4-2 lists the actual timer expiration of these values.
Table 4-2 Handoff removal timer expirations
[Operating range]
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2~5
[Recommended value]
3 (4 seconds)
[Setting tradeoffs:]
If the value of this parameter is set too large, the pilot with a low strength in the
active set will stay there for a long time. In this way, the soft handoff ratio will
increase and some forward traffic channels will be wasted. If the value of this
parameter is set too small, when the strength of a pilot in the active set
fluctuates normally, namely, the strength becomes lower transiently; it is very
likely that this pilot will be removed from the active set. In this way, the
T_TDROP can not take effect in the handoff delay, so handoffs will frequently
occur.
TCMP (Pilot Compare Threshold)
[Description]
If the signal strength of a pilot in the candidate set exceeds T_COMP/2 of a
pilot in the active set, the MS will report a PSMM to the BSC, reminding it of
performing a handoff.
[Type]
Um interface parameter (SPM/ESPM/ITSPM and EHDM/GHDM/UHDM)
[Range and unit]
0~15 (unit: 0.5dB)
[Operating range]
4~6
[Recommended value]
5
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[Setting tradeoffs:]
If the value of this parameter is set too small, it is very easy for the pilots in the
candidate set to replace those in the active set, so handoffs will frequently
occur. If the value is set too large, it is hard for the pilots in the candidate set to
replace those in the active set, so the interference of pilots in the candidate will
exist all the time, resulting in a decrease of the forward capacity.
SOFTSLOPE (Soft HO Increasing Slope Ratio)
[Description]
This parameter defines the slope in the dynamic threshold soft handoff function.
When the dynamic threshold soft handoff function is activated, this slope will be
used to add or remove a soft handoff branch. This parameter is used by the MS.
Only the MS which supports IS95B above can support the dynamic threshold
soft handoff function.
[Type]
Um interface parameter (ESPM/ITSPM and GHDM/UHDM).
[Range and unit]
0~63 (unit: 1/8)
[Operating range]
16~24
[Recommended value]
0. That is to say, the dynamic threshold soft handoff function is not used. The
value of this parameter is recommended to be set to “18” (standing for 2.25)
when this function needs to be started.
[Setting tradeoffs]
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If the value of this parameter is set to “0”, it means the dynamic threshold soft
handoff function is disabled. Otherwise, it means the function is enabled. The
smaller value of this parameter, the higher dynamic addition and deletion
thresholds calculated on condition that the strength of pilots in the active set
remains unchanged. In this case, it is more difficult to add pilots to the active
set, but less difficult to remove them from the active set. As a result, the soft
handoff ratio decreases. However, the soft handoff gain can not be utilized to
the full, so it is more possible that call drops occur. The larger value of this
parameter, the lower dynamic addition and deletion thresholds calculated on
condition that the strength of pilots in the active set remains unchanged. In this
case, the soft handoff ratio will increase. As a result, the soft handoff will
consume excessive forward power, resulting in the decrease of effective
forward capacity.
ADDINTERC (Soft Handoff Pilot Adding Intercept)
[Description]
This parameter defines the pilot-adding intercept in the dynamic threshold soft
handoff function. The BSC set this parameter in complement of binary for the
MS.
[Type]
Um interface parameter (ESPM/ITSPM and GHDM/UHDM).
[Range and unit]
-32~31, (unit: 0.5dB)
[Operating range]
0~6
[Recommended value]
6, namely, 3dB
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[Setting tradeoffs:]
The smaller the value of this parameter is, the lower the calculated dynamic
addition threshold is. As a result, it is easier to add pilots in the neighbor set to
the active set, and the soft handoff ratio will increase, but the forward capacity
will decrease. The larger the value of this parameter is, the higher the
calculated dynamic addition threshold is. As a result, it is more difficult to add
pilots in the neighbor set to the active set, and the soft handoff ratio will
decrease, but the call drop ratio will increase since the soft handoff ratio can
not be utilized to the full.
DROPINTERC (Soft HO Pilot Removing Intercept)
[Description]
This parameter defines the pilot-removing intercept in the dynamic threshold
soft handoff function. The BSC set this parameter in complement of binary for
the MS.
[Type]
Um interface parameter (ESPM/ITSPM and GHDM/UHDM).
[Range and unit]
-32~31, (unit: 0.5dB)
[Operating range]
0~6
[Recommended value]
6, namely, 3dB
Setting tradeoffs:
The smaller the value of this parameter is, the lower the calculated dynamic
deletion threshold is. As a result, it is more difficult to remove pilots from the
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active set, and the soft handoff ratio will increase, but the forward capacity will
decrease. The larger the value of this parameter is, the higher the calculated
dynamic deletion threshold is. As a result, it is easier to remove pilots in the
active set, and the soft handoff ratio will decrease, but the call drop ratio will
increase since the soft handoff gain can not be utilized to the full.
DYNSHOSLOPE (Dynamic Threshold Slope for Adding Branch to Active Set)
[Description]
The function of this parameter is basically the same as that of SOFT_SLOPE
used by the MS to calculate dynamic threshold. The only difference is that this
parameter is internally used when the BSC makes a soft handoff decision.
[Type]
Algorithm parameter
[Range and unit]
0~63 (unit: 1/8)
[Operating range]
16~24
[Recommended value]
18
[Setting tradeoffs]
For the setting of this parameter, refer to SOFTSLOPE. The smaller the value
of this parameter is, the higher the calculated soft handoff threshold is. As a
result, the soft handoff ratio will decrease, but the call drop ratio will increase
since the soft handoff gain can not be utilized to the full. The larger the value of
this parameter is, the lower the calculated soft handoff threshold is. As a result,
it is easier to add pilots in the neighbor set to the active set. In this way, the soft
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handoff ratio will increase to ensure the link quality, but excessive forward
power will be consumed, resulting in a decrease of forward capacity.
DYNSHOINTERCEPT (Dynamic Threshold Intercept for Adding Branch to Active Set)
[Description]
The function of this parameter is basically the same as that of ADDINTERC
used by the MS to calculate dynamic threshold. The difference is that this
parameter is internally used when the BSC makes a soft handoff decision.
[Type]
Algorithm parameter
[Range and unit]
-32~31, (unit: 0.5dB).
[Operating range]
0~6
[Recommended value]
6, namely, 3dB
[Setting tradeoffs:]
The smaller the value of this parameter is, the lower the calculated dynamic
soft handoff threshold is. As a result, the soft handoff ratio will increase, but a
waste of the forward capacity may be caused. The larger the value of this
parameter, the higher the calculated dynamic soft handoff threshold is. As a
result, the soft handoff ratio will decrease, but the call drop ratio will increase
since the soft handoff ratio can not be rationalized.
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SOFTERHOGAIN (Softer Handoff Gain)
[Description]
When the BSC activates the softer handoff preferred function, it will use this
parameter to add a gain to the pilot which has the softer handoff relationship in
the PSMM so that this pilot could be first added to the target active set of the
soft handoff. By default, the softer soft handoff preferred function of the BSC is
currently disabled
[Type]
Algorithm parameter
[Range and unit]
0~63 (unit: 0.5dB)
[Operating range]
0~6
[Recommended value]
0
[Setting tradeoffs:]
The larger the value of this parameter is, the higher priority will be given to the
pilot which has the softer handoff relationship in the neighbor set to be added to
the active set. The smaller the value is, the lower priority will be given to the
pilot which has the softer handoff relationship in the neighbor set.
4.3 Pilot Handoff Algorithm Switch Parameters (PHOALG) [Command Name] MOD PHOALG (Base Station controller Management \ Configuration
Management \ Algorithm Configuration \ Modify Pilot Handoff Algorithm
Switch Parameters)
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SF (Same-Frequency HHO Switch)
[Description]
This parameter indicates whether the call on this carrier is allowed to perform
the same-frequency hard handoff.
[Type]
Algorithm parameter
[Range and unit]
0~1. 0-OFF, 1-ON
[Operating range]
0~1
[Recommended value]
0
[Setting tradeoffs:]
This parameter should be configured according to the actual situation. If the
carrier exists in the neighbor cell of the same frequency of a different BSC and
there is no A3/A7 interface between the two BSCs, when the same-frequency
hard handoff is necessary, the algorithm switch should be set “ON”.
HD (Handdown HHO Switch)
[Description]
This parameter indicates whether the call on this carrier is allowed to perform
the handdown hard handoff.
[Type]
Algorithm parameter
[Range and unit]
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0~1. 0-OFF, 1-ON
[Operating range]
0~1
[Recommended value]
0
[Setting tradeoffs]
This parameter should be configured according to the actual situation. Suppose
the source cell and target cell share the same frequencies and the source cell
has more frequencies available than the target cell. When the MS originate a
call on the available frequency in the source cell moves away from the source
cell, the call can do handoff to the same frequency in the target cell via the
handdown hard handoff.
DRCT (Direct HHO Switch)
[Description]
This parameter indicates whether the call on this carrier is allowed to perform
the direct hard handoff.
[Type]
Algorithm parameter
[Range and unit]
0~1. 0-OFF, 1-ON
[Operating range]
0~1
[Recommended value]
0
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[Setting tradeoffs:]
This parameter should be configured according to the actual situation. If the
source cell and target cell havn't same frequencies, the handdown hard handoff
will be unavailable. For the IS95-compliant MS, the direct hard handoff
algorithm together with the macro diversity function of the hard handoff can also
ensure the hard handoff success ratio.
4.4 Same-Frequency Hard HO Parameters (HHOSAMEFREQPARA)
[Command Name] MOD HHOSF (Base Station controller Management \ Configuration
Management \ Algorithm Configuration \ Modify Same-Frequency HHO
Parameters ).
TADDHHOSF (Same-frequency HHO Serving Carrier Threshold)
[Description]
When the signal strength of pilots in the target active set of the soft handoff is
lower than the value of this parameter, and the signal strength of pilots in the
target active set of the same-frequency hard handoff is higher than the value of
the parameter THHOSFABSTHRS, the same-frequency hard handoff will be
triggered.
[Type]
Algorithm parameter
[Range and unit]
-63~0 (unit: -0.5dB).
[Operating range]
-14~-32
[Recommended value]
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-22
[Setting tradeoffs:]
The smaller the value of this parameter is (such as this values is less than -32),
the lower the signal strength in the source cell becomes when the MS perform
handoff from the source cell to the target cell. As a result, the same-frequency
hard handoff is triggered later. There exists strong interference resulting from
the same frequencies in the hard handoff zone. If the signal strength in the
source cell is low, it is very likely that the MS cannot receive the EHDM issued
by the BSC at the side of the source cell, so the hard handoff will fail. If the
value of this parameter is set too larger (such as more than -14), the condition
of triggering a same-frequency hard handoff is very easy to satisfy. In this case,
the triggering of hard handoff mainly depends on the Same-frequency HHO
target carrier threshold.
THHOSFABSTHRS (Same-frequency HHO Target Carrier Threshold)
[Description]
When the signal strength of pilots in the target active set of the soft handoff is
lower than the value of the parameter TADDHOSF, and the signal strength of
pilots in the target active set of the same-frequency hard handoff is higher than
the value of the parameter THHOSFABSTHRS, the same-frequency hard
handoff will be triggered.
[Type]
Algorithm parameter
[Range and unit]
-63~0 (unit: -0.5dB)
[Operating range]
-10~-28
[Recommended value]
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-18
[Setting tradeoffs:]
The smaller the value of this parameter (such as less than -28) is, the lower the
signal strength in the target cell which is required to trigger the same-frequency
hard handoff is. So the condition of triggering the same-frequency hard handoff
is very easy to satisfy. However, if the signal strength in the target cell is not
high enough, it will be difficult for the MS to capture the channel in the target
cell. As a result, the hard handoff fails. The larger the value of this parameter is
(such as larger than -10), the higher the signal strength in the target cell which
is required to trigger the same-frequency hard handoff is. In this way, it is very
easy for the MS to capture the channel in the target cell when the
same-frequency hard handoff takes place, but it may be more difficult to trigger
a same-frequency hard handoff.
THHOSFRELTHRS (Same-frequency HHO Relative Threshold)
[Description]
When the difference between the signal strength of pilots in the target active
set of the same-frequency hard handoff and that in the target active set of the
soft handoff is higher than the value of this parameter, a same-frequency hard
handoff will be triggered.
[Type]
Algorithm parameter
[Range and unit]
0~63 (unit: 0.5dB), corresponding to 0~31.5dB.
[Operating range]
2~16
[Recommended value]
8
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Setting tradeoffs:
The larger the value of this parameter is, the stronger the signals in the target
cell are than those in the source cell when a hard handoff is to take place. In
this case, it is easier for the MS to capture the forward channel in the target cell.
However, since the signal strength in the source cell is low now, it is very likely
that the MS cannot receive the HDM from the source cell. The smaller the
value of this parameter is, the more easily the hard handoff will be triggered. In
this way, the quality of the forward channel in the source cell will not become so
poor that the MS could receive the HDM from the source cell. But it is not
ensured that the MS can capture the forward channel in the target cell.
4.5 Candidate Pilot Search Control Parameters (CFSCPARA) [Command Name] MOD CFSC (Base Station Controller Management \ Configuration
Management \ Algorithm Configuration \ Modify Candidate Pilot Search
Control Parameters).
SRVFRQECTHRS (Total Rx Power Threshold of Serving Frequency) [Description] This parameter represents the total receiving power threshold of serving
frequency. When MS delivers candidate frequency search request message, if
the search is periodical, MS determines whether to start or stop searching for
different-frequency based on the parameter and SRVFRQECIOTHRS.
[Type] Um interface (CFSRQM)
[Range and unit] 0--31(unit: the conversion relation exists with actual power. Refer to the
[setting tradefoff])
[Operating range] 0--31
[Recommended value]
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31
[Setting tradeoff] If MS is not required to determine whether to start or stop the searching for
different-frequency based on total receiving power of serving frequency, this
parameter must be set to “11111”(that is 31). Otherwise, if you want to MS to
start different-frequency search when total receiving power of serving
frequency is less than total_ec_thresh and stop different-frequency search
when total receiving power of serving frequency is higher than total_ec_thresh,
the parameter must be set to .
SRVFRQECIOTHRS (Total EC/IO Threshold of Serving Frequency) [Description] This parameter represents total pilot Ec/lo threshold of serving frequency.
When MS delivers candidate frequency search request message, if the search
is periodical, MS determines whether to start or stop searching for
different-frequency based on the parameter and SRVFRQEECTHRS.
[Type] Um interface (CFSRQM)
[Range and unit] -31--0, Unit: 0.5dB,
[Operating range] -14-- -28, that is, -31
[Recommended value] -31
[Setting tradeoff] If MS is not required to determine whether to start or stop the searching for
different-frequency based on total pilot Ec/lo of serving frequency, this
parameter must be set to “-31”. Otherwise, if you want to MS to start
different-frequency search when total pilot Ec/lo of serving frequency is less
than total_ec_io_thresh and stop different-frequency search when total
receiving power of serving frequency is higher than total_ec_io_thresh, the
parameter must be set to .
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If the parameter is set to -20, it indicates that MS starts different-frequency
search when total Ec/lo of serving frequency is less than -10dB.
DRXPWRTHRS (Rx Power Difference Threshold) [Description] This parameter represents the difference of receiving power cand_freq_pwr of
candidate frequency and receiving power serving_freq_pwr of serving
frequency. And the power difference between candidate frequency and
serving frequency is set to minimum_power_diff. When the actual the
difference between candidate frequency and serving frequency is less than
the threshold, MS stops the search. MS also uses the parameter during the
hard handoff. If the power difference between target frequency and serving
frequency is less than the threshold, MS returns hard handoff failure to
original channel.
[Type] Um interface (CFSRQM)
[Range and unit] 0--31(unit: the conversion relation exists with actual power. Referee to
[Setting Tradeoff])
[Operating range] 0--31
[Recommended value] 0
[Setting tradeoff] If MS is not required to stop automatically the searching for candidate
frequency or hard handoff to candidate frequency based on the power
difference between candidate frequency and serving frequency, this
parameter must be set to 0. Otherwise, if MS is required to stop automatically
the searching when power difference between candidate frequency and
serving frequency is less than minimum_power_diff (Unit: dB), the parameter
must be set to .
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MINPLTECIO (Min Pilot EC/IO of Candidate Frequency) [Description] This parameter represents the minimum pilot strength threshold that MS
attempts to demodulate forward traffic channel on the candidate frequency.
After receiving the HDM, MS attempts to forward traffic channel of target pilot.
If total pilot strength of active set in the candidate frequency is less than the
parameter, MS regards it as search or handoff failure and stops demodulating
the traffic channel. If the parameter is set to 0, it indicates that this parameter
is not used. Whatever the Eclo of target active set in the candidate frequency
is, perform the search or hard handoff.
[Type] Um interface parameter (CFSRQM)
[Range and unit] -31- 0 (unit: 0.5dB)
[Operating range] -31--0
[Recommended value] 0
[Setting tradeoff] If MS is not required to stop automatically demodulating target traffic channel
based on Eclo strength of target active set in candidate frequency, the
parameter must be set to 0. Otherwise, the parameter must be set to another
value. If the parameter is set to -20, it indicates that MS stops demodulating
forward traffic channel of target active set when comprehensive pilot strength
of target active set in candidate frequency is less than -10dB.
CFTADD (Candidate Frequency T_ADD) [Description] MS uses the parameter to determine whether to report pilot PN of a candidate
frequency when BSC reports the CFSRPM. For example, if the parameter is
set to -12dB, MS reports the pilot that pilot strength is more than -12dB to the
BSC during the CFSRPM.
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[Type] Um interface parameter (CFSRQM)
[Range and unit] -63—0 (unit: 0.5dB)
[Operating range] -16-- -32
[Recommended value] -24
[Setting tradeoff] The smaller the value of the parameter (such as less than -32), the lower the
actual report threshold, and MS is easy to report candidate frequency pilot. In
this way, the report on candidate frequency search report is more frequent,
and many search report messages may be invalid to increase signaling load.
The larger the value of the parameter (such as larger than -16), the higher the
actual report threshold, and MS is difficult to report candidate frequency pilot.
In this way, less signaling is reported. Because the report conditions are very
rigorous, the opportunity for the handoff may be missed.
TFWAITTM (Wait Period on Candidate Frequency) [Description] MS starts a handoff timer during the hard handoff. Target pilot N11m (one)
good frames must be received before timer times out. Otherwise, the handoff
fails. This parameter is used to set the timer length, with the unit of 80ms.
[Type] Um interface parameter (CFSRQM)
[Range and unit] 0—15 (unit: 80ms)
[Operating range] 2--15
[Recommended value] 15
[Setting tradeoff]
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The larger the parameter, the longer the MS waits on the target channel if MS
does not capture target channel during the hard handoff. If the parameter is
set to 15, the longest wait time for MS is 1.2 seconds. If MS hard handoff
failure is not allowed to return to original channel, the parameter must be set
to a maximum value to ensure that MS tries to capture target channel.
The smaller the parameter, the shorter the MS waits on target channel if MS
does not capture target channel during the hard handoff.
CFPLTINC (Pilot Pseudo Noise Code Increase Step during Candidate Frequency Search)
[Description] This parameter represents pilot PNINC on the candidate frequency. After MS
performs hard handoff to candidate frequency, use the parameter as
CFPLTINC of target frequency and to search remaining set.
[Type] Um interface parameter (CFSRQM)
[Range and unit] 0—15 (unit: 64chips)
[Operating range] 2--6
[Recommended value] 4
[Setting tradeoff] This parameter should be configured according to PN planning on the
candidate frequency.
CFSRCHWINN (Neighbor Set Search Window of Candidate Frequency) [Description] This parameter represents default search window of candidate frequency
search set. In the candidate frequency search request message, specify
different search windows respectively for neighbor pilot of each candidate
frequency. If other search windows are not specified for the pilot of a
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candidate frequency, MS uses the default parameter to search neighbor set
pilot of candidate frequency.
[Type] Um interface parameter (CFSRQM)
[Range and unit] 0--15
[Operating range] 8--11
[Recommended value] 8 (60chips)
[Setting tradeoff] If the parameter is set larger, the signal of candidate frequency neighbor pilot
is more possible to be located in the search window. Therefore, the neighbor
pilot of candidate frequency is searched easy with longer time. In addition,
some irrelevant signals may be searched too. If the parameter is set smaller,
it is difficult to search the signal of candidate frequency neighbor pilot because
of longer delay between candidate frequency and serving frequency.
CFSRCHWINR (Remaining Set Search Window of Candidate Frequency) [Description] This parameter represents remaining set search window on the candidate
frequency. After performing hard handoff to candidate frequency successfully,
MS uses the parameter as CFSRCHWINR to search the remaining set.
[Type] Um interface parameter (CFSRQM)
[Range and unit] 0--15(Unit: refer to the table in the CFSRCHWINA)
[Operating range] 9--12
[Recommended value] 9(80chips)
[Setting tradeoff] Refer to CFSRCHWINR.
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SRCHPRD (Periodic Search Period) [Description] When MS is instructed to perform periodical search for candidate frequency,
MS starts one periodical candidate frequency search timer, this parameter is
used to set the duration of timer.
[Type] Um interface parameter (CFSRQM)
[Range and unit] 0--15, table 4-3 shows the relation between parameter value and actual
period.
Table 4-3 The relation between parameter value and period
[Operating range] 1--5
[Recommended value] 2 (2 seconds)
[Setting tradeoff] The larger the parameter, the longer report period of candidate frequency
search report, and BSC is difficult to obtain pilot strength information in time to
candidate frequency so that hard handoff cannot be triggered in time.
The smaller the parameter, the more frequent the candidate frequency search
report, so that hard handoff is easy to be triggered, resulting in much signaling
load. In addition, continuous different-frequency search also affects
conversation quality.
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4.6 Mobile Assisted Hard Handoff Parameter (HHOMAHHOPARA) [Command Name] MOD HHOMA (Base Station Controller Management \ Configuration
Management \ Algorithm Configuration \ Modify Mobile Assisted HHO
Parameters).
TADDMAHHO (Mobile Assisted HHO Serving Carrier Threshold) [Description] When the strength of soft handoff target active set is less than the parameter,
and the strength of MAHHO target active set is higher than
TMAHHOABSOLUTETHRS, trigger the MAHHO.
[Type] Algorithm parameter
[Range and unit] -63--0(unit: 0.5dB)
[Operating range] -14-- -32
[Recommended value] -20
[Setting tradeoff] The smaller the parameter (such as less than -32), the worse the signal
strength of source side cell to trigger later hard handoff when MS performs
hard handoff from source cell to target cell. Consequently, MS is difficult to
receive HDM delivered from source side BTS to result in hard handoff failure.
If the parameter is set too larger (such as more than -14), the conditions is
satisfied easily during the hard handoff. At that time, hard handoff depends on
hard handoff absolute threshold.
MAHHOTHRS (Mobile Assisted HHO Target Carrier Threshold) [Description]
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When the strength of soft handoff target active set is less than TADDMAHHO,
and the strength of MAHHO target active set is higher than this parameter,
trigger the MAHHO.
[Type] Internal algorithm parameter
[Range and unit] -63--0(unit: 0.5dB)
[Operating range] -10-- -28
[Recommended value] -16
[Setting tradeoff] The smaller the parameter (such as less than -28), the worse the signal
strength of target cell required by MS assist hard handoff. The condition is
satisfied easily, so trigger MS assist hard handoff easily. But the signal of
target cell is not good, MS is difficult to capture target cell to result in hard
handoff failure.
The larger the parameter (such as more than -10), the better the signal
strength required by MS assist hard handoff. In this case, MS captures the
channel of target cell easily when MS assists hard handoff, but MS assist hard
handoff may be difficult to be triggered.
RELTHRS (Mobile Assisted HHO Relative Threshold) [Description] When the strength of MAHHO active set is the parameter value higher than
the strength of soft hardoff target active set, trigger MAHHO.
[Type] Internal algorithgm parameter
[Range and unit] 0--63(unit: 0.5dB, that is, 0--31.5dB)
[Operating range] 2--16
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[Recommended value]
8
[Setting tradeoff] The larger the parameter value, the signal of target cell is better than that of
source cell during the hard handoff, and the MS captures forward channel of
target cell more easily. But the signal of source cell during the hard handoff is
bad, MS cannot receive HDM delivered from source cell.
The smaller the parameter value, the hard hadnoff is triggered more easier.
Therefore, the soruce side forward channel is not be very bad, MS receives
HDM from source cell easier, but MS cannot make sure to capature forward
channel of target cell.
STRTSRCHTHRS (Mobile Assisted HHO Start-Search Threshold) [Description] When MS assists hard handoff, BSC must deliver candidate frequency search
request message to MS so that start candidate frequency search of MS. This
parameter is used to determine the time that delivering candidate frequency
search request message to MS. When the pilot strength of active set is less
than the parameter, BSC delivers search request to start the search.
[Type] Internal algorithm parameter
[Range and unit] -63--0(unit: 0.5dB)
[Operating range] -16-- -28
[Recommended value] -16
[Setting tradeoff] The smaller the parameter (such as less than -28), the lower the
corresponding actual physical threshold, and the later hard handoff search is
started. At that time, the link quality of original channel may be bad, but MS
cannot receive candidate frequency search request message. Consequently,
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the search cannot be started normally to miss the opportunity in which the
hard handoff is triggered.
The larger the parameter (such as more that -16), the earlier that
different-frequency search is started when serving frequency strength is very
good. The different-frequency search may disconnect the conversation, so
unnecessary effect on link quality of serving frequency may not be caused.
STOPSRCHTHRS (Mobile Assisted HHO Stop-Search Threshold) [Description]
When MS assist hard handoff, BSC must deliver candidate frequency
search request message to MS to start candidate frequency search of MS.
But different-frequency search may affect conversation quality, BSC must
deliver CFSCNM to MS when the pilot strength of active set is better to stop
different-frequency search.
The parameter is used to determine the time that delivering CFSCNM to
MS to stop the search. When pilot strength of active set is higher than the
parameter, BSC delivers search control message to stop the search.
[Type] Internal algorithm parameter
[Range and unit] -63--0(unit: 0.5dB)
[Operating range] -12-- -24
[Recommended value] -12
[Setting tradeoff] The smaller the parameter (such as less than -24), the lower the
corresponding actual physical threshold, and the hard handoff search stops
easily. Consequently, the MS decreases the different-frequency search but
different-frequency may be late.
The larger the parameter (such as more than -12), the higher the
corresponding actual physical threshold, and the hard handoff search stops
more difficult. In this case, frequent different-frequency search may affect
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conversation quality, but MS is easy to measure the strength of candidate
frequency in real-time.
4.7 Handdown hard handoff Parameter (HHOHANDDOWNPARA) [Command Name] MOD HNDDWN (Base Station Controller Management \ Configuration
Management \ Algorithm Configuration \ Modify Handdown HHO Parameters).
ABSTHRS (Handdown HHO EC/IO Intensity Absolute Threshold) [Description] When pilot strength of soft handoff target active set is less than the parameter,
and the minimum RTD of current active set pilot is more than
HANDDOWNRTD, trigger handdown hard handoff.
[Type] Internal algorithm parameter
[Range and unit] -63--0(unit: 0.5dB)
[Operating range] -10-- -28
[Recommended value] -16
[Setting tradeoff] The smaller the parameter (such as less than -28), the lower the
corresponding actual physical threshold, the later handdown hard handoff is
triggered.
For dual-carrier network, the coverage area of upper cell is larger to involve
much traffic. If the trigger is too late, the fade of source channel link is serious
and HDM cannot be received from original channel to result in handoff failure.
In addition, too late handoff cannot ensure the signal quality of lower target
cell in the handdown hard handoff and results in difficult access in the target
cell. The multiple target hard handoffs can solve the problem to a great extent.
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The larger the parameter (such as more than -10), the higher the
corresponding actual physical threshold, and the earlier handdown hard
handoff is triggered. In this case, the signal quality of lower target cell in the
handdown hard handoff is good and MS is easy to access target cell. For the
dual-carrier network, the coverage area of upper cell is less, so the upper cell
cannot involve traffic.
MAXRTD (Handdown HHO Max Loop Delay Threshold) [Description] When the pilot strength of soft handoff target active set is less than ABSTHRS,
and minimum RTD of current active set pilot is larger than the parameter,
trigger handdown hard handoff. RTD stands for loop delay, reflecting the
distance from BTS to MS. RTD is inaccurate because of multipath effect and
effect of soft handoff. Each chip is of about 244 meters.
[Type] Internal algorithm parameter
[Range and unit] 0--65535(unit: chip)
[Operating range] 0--80
[Recommended value] 15
[Setting tradeoff] The larger the parameter, the farther from hard handoff band to source cell,
and the later hard handoff is triggered. In this case, upper cell of dual-carrier
network can involve more traffic, but the signal quality of target cell cannot be
ensured.
The smaller the parameter, the closer form hard handoff band to source cell,
and the earlier hard handoff is triggered. In this case, the signal quality of
target cell is very good and the access with MS is easy based on radio signal.
But upper cell may not involve traffic to result in overload of lower cell.
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4.8 Direct Hard Handoff Parameter (HHODIRECTPARA) [Command Name] MOD DRCT (Base Station Controller Management \ Configuration
Management \ Algorithm Configuration \ Modify Direct HHO Parameters).
ABSTHRS (Direct HHO EC/IO Strength Absolute Threshold) [Description] When pilot strength of soft handoff target active set is less than the parameter,
and the minimum RTD of current active set pilot is more than DRTRTD,
trigger direct hard handoff.
[Type] Internal algorithm parameter
[Range and unit] -63--0(unit: 0.5dB)
[Operating range] -10-- -28
[Recommended value] -16
[Setting tradeoff] The smaller the parameter (such as less than -28), the lower the
corresponding actual physical threshold, and the later the direct hard handoff
is triggered. Because the fade of source channel link is serious, HDM cannot
be received from original channel to result in handoff failure.
The larger the parameter (such as more than -10), the higher the
corresponding actual physical threshold, and the earlier the direct hard
handoff is triggered. In this case, MS receives HDM form source side, but the
coverage area of original cell is smaller.
MAXRTD (Direct HHO Max. Loop Delay Threshold) [Description] When the pilot strength of soft handoff target active set is less than
DRTABSTHRS, and the minimum RTD of current active set pilot is more than
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the parameter, trigger the direct hard handoff. For the definition of RTD, refer
to the [Description] in the HANDDOWNRTD.
[Type] Internal algorithm parameter
[Range and unit] 0--65535(unit: chip)
[Operating range] 0--80
[Recommended value] 15
[Setting tradeoff] The larger the parameter, the farther the distance from hard handoff band to
source cell, and the later the hard handoff is triggered.
The smaller the parameter, the closer the distance from hard handoff band to
source cell, and the earlier the hard handoff is triggered.
4.9 Pilot Beacon Hard Handoff Parameters (HHOPILOTBEACONPARA)
[Command Name] MOD HHOBPLT (Base Station Controller Management \ Configuration
Management \ Algorithm Configuration \ Modify Pilot Beacon HHO
Parameters).
TADDHHOBPLT (Pilot Beacon HHO Serving Carrier Threshold) [Description] When the signal strength of soft handoff target active set is less than the
parameter, and the strength of pilot beacon hard handoff target cell is higher
than PLTBEANABSTHRS, trigger pilot beacon hard handoff.
[Type] Internal algorithm parameter
[Range and unit] -63--0(unit: 0.5dB)
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[Operating range] -14-- -32
[Recommended value] -22
[Setting tradeoff]] The smaller the parameter (such as less than -32), the worse the signal
strength of source cell to trigger later hard handoff when MS performs hard
handoff from source cell to target cell. Consequently, MS is difficult to receive
HDM delivered from source side BTS to result in hard handoff failure.
If the parameter is set too larger (such as more than -14), the conditions is
satisfied easily when the hard handoff is triggered. At that time, hard handoff
depends on hard handoff absolute threshold.
THHOBPLTABSTHRS (Pilot Beacon HHO Target Carrier Threshold) [Description] When the strength of soft handoff target active set is less than PLTBEAN, and
the strength of pilot beacon hard handoff target active set is higher than the
parameter, trigger pilot beacon hard handoff.
[Type] Internal algorithm parameter
[Range and unit] -63--0(unit: 0.5dB)
[Operating range] -10-- -28
[Recommended value] -28
[Setting tradeoff] The smaller the parameter (such as less than -28), the lower the signal
strength of target cell required by pilot beacon hard handoff. The condition is
satisfied easily, so trigger pilot beacon hard handoff easily. But the signal of
target cell is not good, MS is difficult to capture target cell to result in hard
handoff failure.
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The larger the parameter (such as more than -10), the better the signal
strength required by pilot beacon hard handoff. In this case, MS captures the
channel of target cell easily when pilot beacon handoff occurs, but pilot
beacon hard handoff may be difficult to be triggered.
THHOBPLTRELTHRS (Pilot Beacon HHO Relative Threshold) [Description] When the strength difference between strength of pilot beacon hard handoff
target active set and strength of soft handoff target active set is more than the
parameter, trigger pilot beacon hard handoff..
[Type] Internal algorithm parameter
[Range and unit] 0--63(unit: 0.5dB, that is, 0--31.5dB)
[Operating range] 2--16
[Recommended value] 8
[Setting tradeoff]
The larger the value of this parameter is, the stronger the signals in the target
cell are than those in the source cell when a hard handoff is to take place. In
this case, it is easier for the MS to capture the forward channel in the target cell.
However, since the signal strength in the source cell is low now, it is very likely
that the MS cannot receive the HDM from the source cell. The smaller the
value of this parameter is, the more easily the hard handoff will be triggered. In
this way, the quality of the forward channel in the source cell will not become so
poor that the MS could receive the HDM from the source cell. But it is not
ensured that the MS can capture the forward channel in the target cell.
4.10 Pilot Measurement Request Parameters (PMROPARA) [Command Name]
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MOD PMRO (Base Station controller Management \ Configuration
Management \ Algorithm Configuration \ Modify Pilot Measurement Request
Parameters).
MINPWRTHRS (Pilot Min Rx Power Threshold) [Description] This parameter represents total receiving power threshold of active set pilot.
When periodical pilot measurement request direction is delivered to MS, and
ORDQ field is not “11111111”, MS starts periodical pilot measurement of
serving frequency. MS determines whether to report PPSMM to BSC
periodically based on the parameter and minimum receiving Ec/lo threshold
MINECIOTHRS.
[Type] Um interface parameter (PPMRO)
[Range and unit] 0--31(unit: the conversion relation exists with actual power. Refer to [Setting
tradeoff])
[Operating range] 0--31
[Recommended value] 31
[Setting tradeoff] If MS is not required to determine whether to report PPSMM based on total
receiving power of active set pilot, this parameter must be set to “11111”
(that is 31). Otherwise, if you want to MS to report PPSMM when total
receiving power of active set pilot is less than pilot_ec_thresh and do not
report PPSMM when total receiving power of active set pilot is higher than
pilot_ec_thresh, the parameter must be set to
.
MINECIOTHRS (Pilot Min Rx EC/IO Threshold) [Description]
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This parameter represents total Ec/lo threshold of active set pilot. When
periodical pilot measurement request direction is delivered to MS, and ORDQ
field is not “11111111”, MS starts periodical pilot measurement of serving
frequency. MS determines whether to report PPSMM to BSC periodically
based on the parameter and minimum receiving power threshold
MINPWRTHRS.
[Type] Um interface parameter (PPMRO)
[Range and unit] -31--0(unit: 0.5dB)
[Operating range] -14-- -28, that is, -31
[Recommended value] -31
[Setting tradeoff] If MS is not required to determine whether to report PPSMM based on total
Ec/lo of active set pilot, this parameter must be set to - 31. Otherwise, if you
want to MS to report PPSMM when total Ec/lo of active set pilot is less than
pilot_streng_thresh and do not report PPSMM when total Ec/lo of active set
pilot is higher than pilot_streng_thresh, the parameter must be set
to .
INCLSETPT (Eb/Nt Setpoint Included in PPSMM) [Description] This parameter represents that whether Eb/Nt setting point information
identification bit is included in the PPSMM.
[Type] Um interface parameter (PPMRO)
[Range and unit] 0--1
[Operating range] 0--1
[Recommended value]
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0
[Setting tradeoff] If MS must contain outloop Eb/Nt setting pint information in the PPSMM, the
filed bit is set to 1. Otherwise, it is set to 0. The default value is 0.
ORDQ (PPMRO Report Period) [Description] The parameter represents the period that MS reports PPSMM, with the unit of
80 milliseconds.
[Type] Um interface parameter (PPMRO)
[Range and unit] 1—255 (the range is related to INCLSETPT. Refer to [Setting tradeoff])
[Operating range] 1--255 (the range is related to INCLSETPT. Refer to [Setting tradeoff])
[Recommended value] 25(2 seconds)
[Setting tradeoff] If INCLSETPT is set to 0, the field ranges from 10 to 126. If INCLSETPT is
set to 1, the field ranges from 1 to 254.
The smaller the parameter, the more frequent the PPSMM is reported. In this
case, BSC can trace the change of active set pilot strength of MS, resulting
in large load.
The larger the parameter, the longer period the PPSMM is reported. In this
case, the signaling load is less but BSC cannot trace the change of active
set pilot strength of MS in time.
5. Channel Assignment
5.1 Channel Information (CH_INFO)
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[Command name]
MOD CHINF(Base Station Controller Management\Configuration
Management\Algorighm Configration\Modify Channel Information Parameters)
CARRASSGNVAL (Carrier Assign Threshold)
[Description]
Load threshold used by carrier assign calculation.
[Type]
Algorithm parameter
[Range and unit]
0~ 100 (unit: %).
[Operating range]
0~ 100
[Recommended value]
80
[Setting tradeoff]
None
FBASICVLV (Forward Basic Admission Threshold) [Description] This parameter represents admission control threshold allocated by voice and
data service forward FCH. When forward load is less than this threshold, allow
for the call, soft handoff and hard handoff access. If forward load of a specified
carrier exceeds this threshold, new calls will be prohibited from accessing.
[Type] Algorithm parameter
[Range and unit] 0--100, Unit: %
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[Operating range] 0--100
[Recommended value] 100. This parameter should not be modified.
[Setting tradeoff] If this parameter is set large, the system accesses more calls but system may
breaks down easily.
FSOFTVLV (SHO Forward Admission Threshold) [Description] This parameter represents forward admission threshold during the
establishment of soft handoff branch. If forward load of a specified carrier
exceeds this threshold, new soft handoff branches cannot be established on
the carrier. Generally, the threshold is more than forward basic admission
threshold.
[Type] Algorithm parameter
[Range and unit] 0--100, unit: %
[Operating range] 0--100
[Recommended value] 100. If this parameter is set to 100%, that is, forward admission control
function invalids.
[Setting tradeoff] None
REVMAXUSER (Max Number of Equivalent Reverse Channels)
[Description]
This parameter represents the maximum number of equivalent reverse
channels threshold.
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[Type]
Internal algorithm parameter
[Range and unit]
0~255
[Operating range]
0~ 75
[Recommended value]
75
[Setting tradeoff]
If this parameter is set small, the system can keep steady and no reverse crash
will occur, but the system capacity will decrease. If the parameter is set large,
the system capacity will increase while the system will become unsteady.
E1XDATEQU (Data Service FCH (1XSCH) Equivalent Channels)
[Description]
The reverse 1X data call in the specified carrier (SCH or FCH) is equivalent to
the channel number of RC3 voice call.
[Type]
Internal algorithm parameter
[Range and unit]
0~ 255 (unit: 0.1)
[Operating range]
0~255
[Recommended value]
25
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[Setting tradeoff]
If the parameter is set large, the number of reverse data service users of the
system will decrease and the system can keep steady. Otherwise, the number
of reverse data service users of the system will increase, but the system will
become unsteady.
E2XDATEQU (Data Service 2XSCH Equivalent Channels)
[Description]
The reverse 2X data call in the specified carrier is equivalent to the channel
number of RC3 voice call.
[Type]
Internal algorithm parameter
[Range and unit]
0~255 (unit: 0.1)
[Operating range]
0~255
[Recommended value]
40
[Setting tradeoff]
Refer to E1XDATEQU (Data Service FCH(1XSCH) Equivalent Channels)
E4XDATEQU (Data Service 4XSCH Equivalent Channels)
[Description]
The reverse 4X data call in the specified carrier is equivalent to the channel
number of RC3 voice call.
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[Type]
Internal algorithm parameter
[Range and unit]
0~255 (unit: 0.1)
[Operating range]
0~255
[Recommended value]
75
[Setting tradeoff]
Refer to E1XDATEQU (Data Service FCH(1XSCH) Equivalent Channels).
E8XDATEQU (Data Service 8XSCH Equivalent Channels)
[Description]
The reverse 8X data call in the specified carrier is equivalent to the channel
number of RC3 voice call.
[Type]
Internal algorithm parameter
[Range and unit]
0~255 (unit: 0.1)
[Operating range]
0~255
[Recommended value]
130
[Setting tradeoff]
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Refer to E1XDATEQU (Data Service FCH(1XSCH) Equivalent Channels).
E16XDATEQU (Data Service 16XSCH Equivalent Channels)
[Description]
The reverse 16X data call in the specified carrier is equivalent to the channel
number of RC3 voice call.
[Type]
Internal algorithm parameter
[Range and unit]
0~ 255 (unit: 0.1)
[Operating range]
0~255
[Recommended value]
220
[Setting tradeoff]
Refer to E1XDATEQU (Data Service FCH (1XSCH) Equivalent Channels).
E32XDATEQU (Data Service 32XSCH Equivalent Channels) [Description] The reverse 32X data call in the specified carrier is equivalent to the channel
number of RC3 voice call.
[Type] Internal algorithm parameter
[Range and unit] 0--65535, Unit: 0.1
[Operating range] 0~65535
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[Recommended value] 400, which should not be modified
[Setting tradeoff] For details, see “E1XDATEQU (Data Service FCH (1XSCH) Equivalent Channels)”.
RC1EQU (RC1 Equivalent Voice Channels)
[Description]
RC1 equivalent voice channels are equivalent to RC3 voice call of voice
service on a specified carrier
[Type]
Internal algorithm parameter
[Range and unit]
0~ 100 (unit: 0.1)
[Operating range]
0~100
[Recommended value]
17
[Setting tradeoff]
None
RC2EQU (RC2 Equivalent Voice Channels)
[Description]
RC2 equivalent voice channels are equivalent to RC3 voice call of voice
service on a specified carrier.
[Type]
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Internal algorithm parameter
[Range and unit]
0~ 100 (unit: 0.1)
[Operating range]
0~100
[Recommended value]
21
[Setting tradeoff]
None
RC4EQU (RC4 Equivalent Voice Channels)
[Description]
RC4 equivalent voice channels are equivalent to RC3 voice call of voice
service on a specified carrier.
[Type]
Internal algorithm parameter
[Range and unit]
0~ 100 (unit: 0.1)
[Operating range]
0~100
[Recommended value]
21
[Setting tradeoff]
None
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FEPACAVAL (EPACA Resource Available Threshold)
[Description]
This parameter is used for the Enhanced Priority Access and Channel
Assignment (EPACA) function. EPACA forward load threshold.
[Type]
Internal algorithm parameter
[Range and unit]
0~ 100 (unit: %)
[Operating range]
0~ 100
[Recommended value]
90
[Setting tradeoff]
Since the load fluctuates, the MSC may not clear the call if this parameter is set
too large. As a result, the access of the resource assigned to the privileged
user may fail. If the parameter is set too small, the MSC may clear the call.
MSPREVASSGNTP (MS Version Priority Type)
[Description]
After the specified carrier assigned according to the MS version at priority,
select the MS version type assigned by the carrier at priority.
[Type]
Internal algorithm parameter
[Range and unit]
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0~ 2. 0: Priority of IS2000 MS, 1: Priority of IS95 MS, 2: No priority
[Operating range]
0~ 2
[Recommended value]
2
[Setting tradeoff]
None
SERVASSGNTP (Service Priority Type)
[Description]
After the specified carrier assigned according to the service type at priority,
select the service type assigned by the carrier at priority.
[Type]
Internal algorithm parameter
[Range and unit]
0~ 2. 0: Voice service priority, 1: data service priority, 2: No priority
[Operating range]
0~ 2
[Recommended value]
2
[Setting tradeoff]
None
5.2 SCH Assign Parameters (SCH_PARA) [Command name]
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MOD SCH (Base Station Controller Management\Configuration
Management\Algorithm Configuration------Modify SCH Allocation Parameter)
TFAC (Physical Channel Transmission Efficiency Factor)
[Description]
This parameter is used for the assignment of forward SCH DURATION. This
parameter can offset the effect of the protocol layer overhead on the calculation
of duration. It indicates the efficiency of the valid data transmission on the
forward channel. When the forward SCH is assigned dynamically, this
parameter is used to adjust the assigned duration. The smaller this parameter
is, the longer the assigned duration is. If it is set to 0, the system will forcedly
change it to the default 80.
[Type]
Internal algorithm parameter
[Range and unit]
0~ 100 (unit: %).
[Operating range]
0~ 100
[Recommended value]
80
[Setting tradeoff]
In practice, it is usually unnecessary to change the recommended value.
NBRINTFFAC (Neighbor Cell Interference Factor) [Description] This parameter is used for reverse admission control. It indicates the capacity
effect on the current cell owing to the interference from its neighbor cell. The
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greater this parameter is, the harder the call access to this cell will be. It is
recommended to set it to 0.
[Type] Internal algorithm parameter
[Range and unit] 0--100, Unit: %
[Operating range] 0--100
[Recommended value]
0.
[Setting tradeoff] This value is used seldom, so this parameter is set to 0 temporarily.
SIGDL (SCH Signalling Delay)
[Description]
The system signalling delay during the SCH assignment. If this parameter is
too small, the asynchronization of SCH transmission might occur along with the
bad transmission quality.
[Type]
Algorithm parameter
[Range and unit]
0~ 31 (unit: 20ms).
[Operating range]
0~ 31
[Recommended value]
10
[Setting tradeoff]
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If the value of the parameter is set too small, the data transmission may fail. If
the value of the parameter is set too large, the data transmission may lag
behind.
TDL (SCH Transmission Delay)
[Description]
The parameter is not used at present. The signalling delay from the moment
the system sends the SCH establishment request to the moment transmission
starts on the SCH. When the forward SCH duration is assigned dynamically,
this parameter is used to adjust the assigned duration. The greater this
parameter is, the longer the assigned SCH duration is.
[Type]
Internal algorithm parameter
[Range and unit]
0~255 (unit: 20ms frame)
[Operating range]
0~ 100
[Recommended value]
64
[Setting tradeoff]
The larger the value of this parameter is, the longer the duration is. In this way,
the SCH assignment duration will last longer.
FWDCENPLTTHRS (Forward Central Pilot Threshold) [Description] The pilot strength of the assigned forward SCH over 8X cannot be lower than
this central pilot strength threshold.
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[Type] Internal algorithm parameter
[Range and unit] -63--0. Unit: 0.5dB.
[Operating range]
-63--0
[Recommended value] -13, namely, -6.5dB.
[Setting tradeoff] Under special conditions, if SCH to be allocated is not restricted by pilot
strength, this value is modified as -31, that is, -15.5dB.
FWDTRANPLTTHRS (Forward Transition Pilot Threshold) [Description] The pilot strength of the assigned forward SCH over 4X cannot be lower than
this transition pilot strength threshold.
[Type] Internal algorithm parameter
[Range and unit] -63--0. Unit: 0.5dB.
[Operating range] -63--0
[Recommended value] -18, that is, -9dB.
[Setting tradeoff] Under special conditions, if SCH to be allocated is not restricted by pilot
strength, this parameter is modified as -31, that is -15.5dB. Note that
“Forward Central Pilot Threshold” is higher than “Forward Transition Pilot Threshold”.
FWDBDR4XPLTTHRS (Forward Border 4x Pilot Threshold) [Description]
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The pilot strength of the assigned forward SCH over 2X cannot be lower than
this forward border 4X pilot strength threshold.
[Type] Internal algorithm parameter
[Range and unit] -63--0. Unit: 0.5dB.
[Operating range] -63--0
[Recommended value] -22. Namely, -11dB.
[Setting tradeoff]
Under special conditions, if SCH to be allocated is not restricted by pilot
strength, this parameter is modified as -31, that is -15.5dB. Note that “Forward Transition Pilot Threshold” must be higher than “Forward Border 4x Pilot Threshold”.
FWDBDR2XPLTTHRS (Forward Border 2x Pilot Threshold)
[Description]
The pilot strength of the assigned forward SCH over 1X cannot be lower than
this forward border 2X pilot strength threshold.
[Type]
Algorithm parameter
[Range and unit]
-63--0. Unit: 0.5dB.
[Operating range]
-63--0
[Recommended value]
-26, namely, -13dB
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[Setting tradeoff]
Under special conditions, if SCH to be allocated is not restricted by pilot
strength, this parameter is modified as -31, namely, -15.5dB. Note that
“Forward Border 4x Pilot Threshold” must be higher than “Forward Border 2x Pilot Threshold”.
FWDBDR1XPLTTHRS (Forward Border 1x Pilot Threshold) [Description] The pilot strength of the assigned forward SCH over or up to 1X cannot be
lower than this forward border 1X pilot strength threshold.
[Type] Algorithm parameter
[Range and unit] -63--0. Unit: 0.5dB.
[Operating range] -63--0
[Recommended value] -28, namely, -14dB.
[Setting tradeoff] Under special conditions, if SCH to be allocated is not restricted by pilot
strength, this parameter is modified as -31, namely, -15.5dB. Note that
“Forward Border 2x Pilot Threshold” must be higher than “Forward Border 1x Pilot Threshold”.
REVBDRCENPLTTHRS (Reverse Central Pilot Threshold) REVBDRTRANPLTTHRS (Reverse Transition Pilot Threshold) REVBDR4XPLTTHRS (Reverse Border 4x Pilot Threshold) REVBDR2XPLTTHRS (Reverse Border 2x Pilot Threshold) REVBDR1XPLTTHRS (Reverse Border 1x Pilot Threshold) [Description] See corresponding forward pilot strength threshold. The difference lies in
those ones are designated for forward SCH and these ones for reverse SCH.
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[Type] Algorithm parameter
[Range and unit] -63--0. Unit: 0.5dB.
[Operating range] -63--0
[Recommended value] The recommended value is consistent with corresponding forward parameter.
[Setting tradeoff]
R1XDRT (Reverse 1XSCH Duration)
[Description] This parameter represents the assigned duration corresponding to the
assigned reverse 1X SCH. The duration varies with corresponding reverse
SCH of different rate.
[Type] Algorithm parameter
[Range and unit] 0~15. For details, see table 5-1.
[Operating range] 1~14
[Recommended value] 14(5.12s)
[Setting tradeoff] 14” is the maximum value representing the finite assignment duration. A large
value of this parameter can improve the reverse data transmission rate. If the
SCH rate is low, the parameter should be more than “13”.
Table 5-1 Representation of SCHDRT
F-SCHDRT
R-SCHDRT
(binary)
Duration in 20 ms
0001 1
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0010 2
0011 3
0100 4
0101 5
0110 6
0111 7
1000 8
1001 16
1010 32
1011 64
1100 96
1101 128
1110 256
1111 Indefinite
R2XDRT (Reverse 2XSCH Duration) [Description] This parameter represents the assigned duration corresponding to the
assigned reverse 2X SCH.. For details, see R1XDRT.
[Type] Algorithm parameter
[Range and unit] 0~15. For details, see table 5-1.
[Operating range] 1~14
[Recommended value] 14(5.12s)
[Setting tradeoff]
“14” is the maximum value representing the finite assignment duration. A large
value of this parameter can improve the reverse data transmission rate. If the
SCH rate is low, the parameter must be more than 13.
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R4XDRT (Reverse 4XSCH Duration) [Description] This parameter represents the assigned duration corresponding to the
assigned reverse 4X SCH. For details, see R1XDRT.
[Type] Algorithm parameter
[Range and unit] 0~15. For details, see table 5-1.
[Operating range] 1~14
[Recommended value] 14(5.12s)
[Setting tradeoff] 14” is the maximum value representing the finite assignment duration. A large
value of this parameter can improve the reverse data transmission rate. If the
SCH rate is low, the parameter must be more than 13.
R8XDRT (Reverse 8XSCH Duration) [Description] This parameter represents the assigned duration corresponding to the
assigned reverse 8X SCH. For details, see R1XDRT.
[Type] Algorithm parameter
[Range and unit] 0~15. For details, see table 5-1.
[Operating range] 1~14
[Recommended value] 13.
[Setting tradeoff] 14” is the maximum value representing the finite assignment duration. A large
value of this parameter can improve the reverse data transmission rate.
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R16XDRT (Reverse 16XSCH Duration) [Description] This parameter represents the assigned duration corresponding to the
assigned reverse 16X SCH. For details, see R1XDRT.
[Type] Algorithm parameter
[Range and unit] 0~15,For details, see table 5-1.
[Operating range] 1~14
[Recommended value] 13.
[Setting tradeoff] 14” is the maximum value representing the finite assignment duration. A large
value of this parameter can improve the reverse data transmission rate.
R32XDRT (Reverse 32XSCH Duration) [Description] This parameter represents the assigned duration corresponding to the
assigned reverse 32X SCH. For details, see R1XDRT.
[Type] Algorithm parameter
[Range and unit] 0~15,For details, see table 5-1.
[Operating range] 1~14
[Recommended value] 10.
[Setting tradeoff] 14” is the maximum value representing the finite assignment duration. A
large value of this parameter can improve the reverse data transmission rate.
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FWDMINDRT (Min Duration of Forward SCH) [Description] This parameter represents the minimum assigned duration of the forward
SCH.
[Type]
Internal algorithm parameter
[Range and unit]
1~255 (unit: 20ms )
[Operating range] 1~255
[Recommended value] 8.
[Setting tradeoff]
This parameter should be set with reference to the delay overhead for one SCH
assignment and should be no less than 8.
FWDMAXDRT (Max Duration of Forward SCH)
[Description]
This parameter represents the maximum assigned duration of the forward
SCH.
[Type]
Internal algorithm parameter
[Range and unit]
1~255 (unit: 20ms)
[Operating range] 1~255
[Recommended value]
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64
[Setting tradeoff]
A large value of this parameter can improve the SCH transmission efficiency
when the MS is under a good radio environment, but it is unfavourable for the
transmission when the MS moves.
FWD32XMINDRT (Min Duration of Forward 32X SCH) [Description] This parameter represents the minimum assigned duration of the forward
32X SCH.
[Type] Algorithm parameter
[Range and unit] 0~15,For details, see table 5-1..
[Operating range] 1~14
[Recommended value] 10.
[Setting tradeoff] 14” is the maximum value representing the finite assignment duration. A large
value of this parameter can improve the reverse data transmission rate.
FWD32XMAXDRT (Max Duration of Forward 32X SCH) [Description] This parameter represents the maximum assigned duration of the forward
32X SCH.
[Type] Algorithm parameter
[Range and unit] 0~15,For details, see table 5-1..
[Operating range]
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1~15
[Recommended value] 15, that is, indefinite duration
[Setting tradeoff] Whether the forward and reverse rate can be up to 32x, they are controlled by
respective switch. In addition, whether to support 32x for MS
FWDBDR1XVLV (Border Area 1X SCH Forward Admission Threshold)
FWDBDR2XVLV (Border Area 2X SCH Forward Admission Threshold)
FWDBDR4XVLV (Border Area 4X SCH Forward Admission Threshold)
[Description]
These parameters represent the allowable maximum forward load of 1X, 2X
and 4X SCHs assigned in the border area, respectively. The forward load of
the assigned border area forward 1X SCH cannot be higher than or equal to
this admission threshold.
[Type]
Internal algorithm parameter
[Range and unit]
0~100 (unit: %)
[Operating range]
0~100
[Recommended value]
1X, 2X and 4X correspond to 68, 63 and 54 respectively.
[Setting tradeoff] None
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FWDMID1XVLV (Transitional Area 1X SCH Forward Admission Threshold)
FWDMID2XVLV (Transitional Area 2X SCH Forward Admission Threshold)
FWDMID4XVLV (Transitional Area 4X SCH Forward Admission Threshold)
FWDMID8XVLV (Transitional Area 8X SCH Forward admission Threshold)
[Description]
These parameters represent the allowable maximum forward load of 1X, 2X,
4X and 8X SCHs assigned in the intermediate area, respectively.
[Type] Algorithm parameter
[Range and unit] 0~100, Unit: %
[Operating range] 0~100
[Recommended value] 1X, 2X, 4X and 8X correspond to 72, 68, 63 and 54.
[Setting tradeoff] None
FWDCEN1XVLV (Central Area 1X SCH Forward Admission Threshold) FWDCEN2XVLV (Central Area 2X SCH Forward Admission Threshold) FWDCEN4XVLV (Central Area 4X SCH Forward Admission Threshold) FWDCEN8XVLV (Central Area 8X SCH Forward Admission Threshold) FWDCEN16XVLV (Central Area 16X SCH Forward Admission Threshold) FWDCEN32XVLV (Central Area 32X SCH Forward Admission Threshold) [Description] These parameters represent the allowable maximum forward load of 1X, 2X,
4X, 8X and 16X SCHs assigned in the central area, respectively.
[Type] Algorithm parameter
[Range and unit] 0~100, Unit: %
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[Operating range] 0~100
[Recommended value] 1X, 2X, 4X, 8X, 16X and 32X correspond to 74, 73, 71, 68, 62 and 60.
[Setting tradeoff] None
SCHINIPWRHOOFFSET (Handoff Offset) [Description] Initial transmit power of SCH is estimated based on that of FCH and
consideration of channel rate, target FER, channel code mode and handoff
state.
When the effect of handoff state is considered, perform power correction to
handoff factor. The soft handoff power offset required by SCH varies with
different RCs and code modes. This parameter is used to specify handoff
offset and make up the deviation caused by estimation.
[Type] Algorithm parameter
[Range and unit] -128--127.
[Operating range] -128--127
[Recommended value] 0.
[Setting tradeoff] None
SCHINITPWRADJUST (SCH Initial Adjust) [Description] Initial transmit power of SCH is estimated based on that of FCH and
consideration of channel rate, target FER, channel code mode and handoff
state. This parameter is used to make up the deviation caused by the above
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estimation.
[Type] Algorithm parameter
[Range and unit] -128--127.
[Operating range] -128--127
[Recommended value] 0.
[Setting tradeoff] None
5.3 CHM Module Parameters (MCHM) [Command name] MOD MCHM (Base Station Controller Management\Configuration
Management\Algorithm Configuration----Modify MCHM)
ACMACRODIVSW (Access Macro Diversity Switch) [Description] This parameter represents the setting of a switch, indicating whether the
access macro diversity function is enabled or not..
[Type]
Algorithm parameter
[Range and unit]
0~1. 0: Off, 1: ON
[Operating range]
0~1
[Recommended value]
1
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[Setting tradeoff]
It is recommended to enable the access macro diversity switch so as to
improve the access success ratio.
MBRANUMA (Max. Number of Access Macro Diversity Branches)
[Description]
This parameter indicates the allowable maximum branches of the access
macro diversity.
[Type]
Algorithm parameter
[Range and unit]
1~6 (unit: branch)
[Operating range]
1~6
[Recommended value]
3
[Setting tradeoff]
If the value of this parameter is set too large, the access success ratio will be
improved little, but resources will be wasted.
MBRANUMINTERHHO (Max Number of Inter-BSC Hard Handoff Branches)
[Description]
This parameter represents the maximum number of branches that can be
assigned when the inter-BSC hard handoff is processed at the target side.
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[Type]
Algorithm parameter
[Range and unit]
1~6 (unit: branch)
[Operating range]
1~6
[Recommended value]
6
[Setting tradeoff]
Since the target active set is aimlessly selected to some extent when a hard
handoff is performed, the value of this parameter can be set large so as to
improve the hard handoff success ratio.
DSERVALWHFTYPE (Data Call Supported Handoff Types)
[Description]
This parameter represents the handoff type of the data call, indicating whether
the data service is allowed to perform a soft handoff or hard handoff. Note that
this parameter only applies to the FCH, indicating whether allow the FCH of
data service to perform a soft handoff or hard handoff. It is different from the
soft handoff of SCH.
[Type]
Algorithm parameter
[Range and unit]
0~3. 0: soft handoff and hard handoff are allowed, 1: only soft handoff is
allowed 2: only hard handoff is allowed, 3: no handoff is allowed.
[Operating range]
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0~3
[Recommended value]
0
[Setting tradeoff]
None
DSERVPWRRPTFRM (Frames of Data Service Measurement Report)
[Description]
For the data service, the MS should periodically report PMRMs so that the
real-time change of pilot strength can be monitored. This parameter indicates
that the MS will report PMRM when the accumulated frames exceed
2^( DSERVPWRRPTFRM /2)* 5.
[Type]
Um interface parameter (SPM/MCRRPM/PCNPM).
[Range and unit]0~15.
[Operating range]0~3
[Recommended value] 2, namely, when the accumulated total frames reach
10, the MS will report a PMRM. This value remains unchangeable.
[Setting tradeoff]
If the value of the parameter is set too small, the MS will frequently report
PMRMs. As a result, the reverse link quality is affected and the CPU load of
SPU increases. However, if the value of the parameter is set too large, it will be
difficult to monitor the real-time change of pilot strength.
.
DSERVPWRRPTDEY (Data Service Measurement Report Delay)
[Description]
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For the data service, the MS should periodically report PMRMs so that the
real-time change of pilot strength can be monitored. This parameter indicates
that the counter will be reset at a delay of DSERVPWRRPTDEY * 4 frames
after the MS reports a PMRM. That is, the PMRM report period is
[2^( DSERVPWRRPTDEY /2)* 5 + DSERVPWRRPTDEY * 4] frames.
[Type]
Um interface parameter (SPM/MCRRPM/PCNPM).
[Range and unit]
0~31 (unit: 4 frames)
[Operating range]
0~31
[Recommended value]
5, namely, 20 frames
[Setting tradeoff]
None
SPT16XREVSCHSW (16X R-SCH Support Switch)
[Description]
This parameter indicates the allowable maximum rate of the reverse SCH is
16X or 8X.When the switch is set ON, the allowable maximum rate is 16X.
[Type]
Algorithm parameter
[Range and unit]
0~ 1. 0: Maximum rate is 8X, 1: Maximum rate is 16X
[Operating range]
0~ 1
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[Recommended value]
1
[Setting tradeoff]
None
SCHRELBYFERSW (FER Based SCH Release Switch)
[Description]
When the switch is set ON, it indicates that one SCH can be initiatively
released according to the FER of the SCH.
[Type]
Algorithm parameter
[Range and unit]
0~3. 0 – Off, 1 – forward ON, 2 – reverse ON, 3 – both reverse and forward ON
[Operating range]
0~ 3
[Recommended value]
0
[Setting tradeoff]
None
SCHRELBYPILSTSW (Pilot Strength Based SCH Release Switch)
[Description]
When the switch is set ON, it indicates that one SCH can be initiatively
released according to the strength of the pilots in the active.
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[Type]
Internal parameter
[Range and unit]
0~3. 0 – Off, 1 – forward ON, 2 – reverse ON, 3 – both reverse and forward ON
[Operating range]
0~ 3
[Recommended value]
0
[Setting tradeoff]
None
SCHRELBYLOADSW (Overload Based SCH Release Switch)
[Description]
When the switch is set ON, it indicates that one SCH can be initiatively
released according to the load of the SCH.
[Type]
Internal parameter
[Range and unit]
0~3. 0 – Off, 1 – forward ON, 2 – reverse ON, 3 – both reverse and forward ON
[Operating range]
0~ 3
[Recommended value]
0
[Setting tradeoff]
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Disabled when the SCH supports the soft handoff
SCHRELFRMDEL (Remained Frames Threshold for SCH Release)
[Description]
This parameter represents the threshold of remaining unprocessed frames of
the burst when a release decision is made. When the number of remaining
unprocessed frames of the burst is less than the threshold, the SCH will not be
released initiatively. All remaining frames may have been processed before the
initiative release takes effect, so the SCH is spontaneously released. Therefore,
the initiative release does not take effect and meaningless signalling operations
are caused.
[Type]
Algorithm parameter
[Range and unit]
0~ 255 (unit: 20ms frame)
[Operating range]
0~ 255
[Recommended value]
10
[Setting tradeoff]
Since there is a delay from time when the release decision is made to the time
when the relevant main bodies process the release operations, if the value of
this parameter is set too small, some meaningless signaling operations may be
caused. Otherwise, if the value of the parameter is set too large, the release
can not be triggered in time.
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SCHRELTALFRMTHR (Total Frames Threshold for SCH Release)
[Description]
This parameter represents the threshold of total frames required to be
measured when the SCH is released according to the FER. Refer to
SCHRELBYFERSW (FER Based SCH Release Switch).
[Type]
Algorithm parameter
[Range and unit]
0~ 255 (unit: 20ms frame)
[Operating range]
0~ 255
[Recommended value]
10
[Setting tradeoff]
If the value of this parameter is set too small, the FER feed back by the PMRM
can not reflect the real frame error trend.
SCHRELFERFACTOR (FER Factor for SCH Release) [Description] This parameter represents (actual FER - target FER)/target FER 10, which
indicates the fade factor of call quality. When the FER exceeds (1+ fade factor
of SCH/10) target FER, the reverse SCH will be initiatively released. The
value of the parameter is 10 times the actual value. For example, the actual
meaning of the value “15” of this parameter is “1.5”.Refer to
SCHRELBYFERSW (FER Based SCH Release Switch)
[Type]
Algorithm parameter
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[Range and unit]
0~ 255 (unit: 1/10)
[Operating range]
0~ 255
[Recommended value]
70
[Setting tradeoff]
None
SCHRELBRANSTREDIFF (Pilots Strength Difference Threshold for R-SCH)
[Description]
When the strength difference of the pilot of the branch of the SCH and the pilot
of the strongest branch exceeds the threshold, the SCH will be initiatively
released. Refer to SCHRELBYPILSTSW (Pilot Strength Based SCH Release
SCH Switch).
[Type]
Algorithm parameter
[Range and unit]
0~ 16 (unit: 0.5dB)
[Operating range]
0~ 16
[Recommended value]
4
[Setting tradeoffs] If the switch of SCH release based on pilot strength is open, release the SCH
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based on the threshold, even in the SCH soft handoff.
SCHRELLDRELATHRESH (Overload Release Relative Threshold for SCH Release)
[Description]
When the load is SCHRELLDRELATHRESH and higher than the basic
admission threshold, the SCH will be initiatively released. Refer to
SCHRELSUMRATE (SCH Release Rate Sum (Based Overload)).
[Type]
Algorithm parameter
[Range and unit]
0~ 100 (unit: %)
[Operating range]
0~ 100
[Recommended value]
2
[Setting tradeoff]
None
SCHRELDTXDUR (DTX Duration)
[Description]
This parameter represents the allowable duration of Discontinuous
Transmission (DTX) of the MS on the reverse SCH. If the MS does not restart
transmitting data within SCHRELDTXDUR (DTX duration) after it stops
transmitting data on the reverse SCH, the MS will automatically release the
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reverse SCH. This parameter is only used for the optimization of R-SCH
resources. If the parameter is set to “15”, it means that the function is disabled.
[Type]
Um interface parameter. (SCAM/ GHDM/ ESCAM)
[Range and unit] 0—15, for details, see table 5-1
[Operating range] 0--15
[Recommended value]
9.
[Setting tradeoff] When reverse data service is demonstrated, the parameter can be set to 15.
SCHRELSUMRATE (SCH Release Rate Sum (Based Overload)) [Description] This parameter represents the sum of rates of the SCHs that are required to
be released once according to the load. This parameter specifies the
minimum total number of the 1X SCHs that are required to be released at one
time. If the recommended value is 4, current SCH is of 2X, release two 2X
SCH once to the total number of SCH released is of 2X. For Details, see
“SCHRELBYLOADSW (Overload Based SCH Release Switch)” [Type] Algorithm parameter
[Range and unit] 0--255, Unit: integral times of the rate of SCH
[Operating range] 0--255
[Recommended value] 4.
[Setting tradeoff] None
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HARDASSIGNTYPE (Priority Assign Type)
[Description]
This parameter is one related to the hard assignment function. If the hard
assignment function is started, this parameter should be configured accordingly
so as to specify the standard of the carrier selection for hard assignment. For
example, the hard assignment can be performed according to the protocol
(IS95 or IS2000) of the MS or the service type (voice service or data service).
[Type]
Algorithm parameter
[Range and unit]
0~3. 0: The data call is first assigned to “carrier first for data service”, 1: Priority
assignment is performed for the voice call and data call, respectively, 2.
Assignment is performed according to the version of MS, 3: No priority
assignment is performed according to the protocol version of the MS or the
service type.
[Operating range]
0~ 3
[Recommended value]
3
[Setting tradeoff]
This parameter should be configured according to the requirements of the
customer and the network.
FWDSCH32XSW (Forward 32X SCH Switch) [Description] This parameter represents that the maximum allowable SCH rate is up to 32X.
When the switch is open, it indicates that the maximum allocated rate is 32X.
32X implemented through 128-order WALSH in the RC4.
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[Type] Algorithm parameter
[Range and unit] 0--1,0---The maximum allocated rate is 16X; 1—the maximum allocated rate
is 32X.
[Operating range] 0--1
[Recommended value] 0.
[Setting tradeoff] None
REVSCH32XSW (Reverse 32X SCH Switch) [Description] This parameter represents that the maximum allowable rate allocated by
reverse SCH is up to 32X. When the switch is open, it indicates that allocated
maximum rate is 32X.
[Type] Algorithm parameter
[Range and unit] 0--1,0—Off, 1---ON.
[Operating range] 0--1.
[Recommended value] 0.
[Setting tradeoff] None
FWDSCHSHOSW (F-SCH Soft Handoff Switch of) [Description] This parameter represents a switch setting, indicating that whether to allow to
enable forward SCH soft handoff function.
[Type]
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Algorithm parameter
[Range and unit] 0~1, 0—Off, 1---ON.
[Operating range] 0~1
[Recommended value] 0.
[Setting tradeoff] None
REVSCHSHOSW (R-SCH Soft Handoff Switch) [Description] This parameter represents a switch setting, indicating whether to allow to
enable reverse SCH soft handoff function.
[Type] Internal algorithm parameter
[Range and unit] 0~1, 0—Off, 1---ON
[Operating range] 0~1
[Recommended value] 0.
[Setting tradeoff] None
FWDSASTHR (F-SCH Handoff Initial Threshold) [Description] When forward SCH activation set is selected, determine whether to a branch
is added to SCH activation set based on decision variable and the parameter.
The decision variable is composed of two parts with different weights: forward
pilot strength measures the forward link, and reverse pilot strength measures
the reverse link.
[Type]
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Internal algorithm parameter
[Range and unit] -6300--0, unit: 1/200dB
[Operating range] -6300--0,
[Recommended value] -1200, that is, -6dB, which should not be modified
[Setting tradeoff] FWDSASMAXNUM (F-SCH Soft Handoff Maximum Branch Number) [Description] This parameter represents the maximum number of branches of forward SCH
soft handoff.
[Type] Internal algorithm parameter
[Range and unit] 1--6
[Operating range] 1--6
[Recommended value] 3, which should not be modified
[Setting tradeoff] If this parameter is set large, SCH soft handoff ratio increases to occupy too
much forward resource and waste forward capacity. If the parameter is set
small, SCH soft handoff ratio decreases but soft handoff gain cannot be
utilized rationally to decrease transmission performance of data service.
FWDSASDYNSW (F-SCH Soft Handoff Dynamic Threshold Switch) [Description] This parameter represents that whether to allow forward SCH dynamical soft
handoff. It is similar to that of forward FCH, and it is controlled by BSC.
[Type] Internal algorithm parameter
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[Range and unit] 0 and 1,0---Off ,1---ON
[Operating range] 0 and 1
[Recommended value] 0, which should not be modified
[Setting tradeoff]
FWDSASSLOPE (F-SCH Soft Handoff Slope) [Description] The function is similar to that of “DYNSHOSLOPE (add branch to dynamical
threshold slope of activation set) and used when BSC performs dynamic soft
handoff decision. The difference lies in that the former is designated for SCH
but the latter for FCH.
[Type] Algorithm parameter
[Range and unit] 0--255
[Operating range] 0--255
[Recommended value] 18
[Setting tradeoff] For the setting, see SOFTSLOPE. The less the parameter, the higher the
calculated SCH soft handoff threshold and the less the SCH soft handoff ratio
is. But soft handoff gain cannot be used completely; the transmission
performance of data service is affected.
The larger the parameter, the less the calculated SCH soft handoff threshold,
and adjacent pilot is added easily to SCH activation set. Consequently, SCH
soft handoff ratio increases to guarantee transmission performance but too
many forward powers are consumed to decrease forward capacity.
FWDSASINTERCEPT (F-SCH Soft Handoff Intercept) [Description]
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The function is similar to that of “DYNSHOINTERCEPT (add branch to
dynamic threshold interception of activation set)”, and used when BSC
performs dynamical soft handoff decision. The difference lies in that the
former is designated for SCH but the latter for FCH.
[Type] Internal algorithm parameter
[Range and unit] -128--127
[Operating range] 32--38
[Recommended value] 38
[Setting tradeoff] The less the parameter, the lower the calculated SCH dynamic soft handoff
threshold, and the higher the ratio of SCH soft handoff ratio is. But forward
capacity may be wasted. The higher the parameter, the higher the calculated
SCH dynamic threshold, and the lower the ratio of SCH soft handoff is. But
the soft handoff ratio cannot be used rationally to affect the transmission
performance of data service.
FWDSASWEIGHTECIO (F-SCH Soft Handoff Threshold EcIo Weight) [Description] This parameter is used in the variable decision when SCH activation set is
selected, reflecting the weight of forward link. The weight of corresponding
reverse link= 1 – this value.
[Type] Internal algorithm parameter
[Range and unit] 0--100, indicating the percentage
[Operating range] 0--100
[Recommended value]
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100 (when forward SCH activation set is selected, reverse link is not
considered.)
[Setting tradeoff]
FWDSASADJECIODEALTA (Delta EcIo Threshold for F-SCH Soft Handoff Adjustment) [Description] When forward SCH activation is selected, adjust the activation set based on
rate decision. Forward pilot strength of each branch should be up a
requirement when this parameter adjusts SCH activation set branch.
[Type] Internal algorithm parameter
[Range and unit] -63--0, unit: 0.5dB
[Operating range] -63--0
[Recommended value] -12, namely, -6dB.
[Setting tradeoff] FWDSASADJRATEDELTA (Delta Rate Threshold for F-SCH Soft Handoff Adjustment) [Description]
When forward SCH activation set is selected, adjust the activation set based
on rate decision. The rate allocated by each branch should be up to a
requirement when this parameter adjusts the SCH activation set branch.
[Type] Internal algorithm parameter
[Range and unit] 0--63,
[Operating range]
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0--4, indicating the index of corresponding rate 0: 1X,,1:2X.,2:4X,3: 8X,4:
16X
[Recommended value] 1, that is, the difference of rate is 1.
[Setting tradeoff] REVSASTHRS (R-SCH Soft Handoff Initial Threshold) [Description]
When reverse SCH activation set is selected, compare a judgment threshold
reflecting reverse link with this parameter to determine whether to add certain
branch to reverse SCH activation set. Reverse pilot strength reflects current
reverse link.
[Type] Internal algorithm parameter
[Range and unit] -255--0, Unit: 0.25dB
[Operating range] -255--0
[Recommended value] -24, that is, select activation set of FCH as that of SCH, which should not be
modified.
[Setting tradeoff]
REVSASMAXNUM (R-SCH Soft Handoff Max. Leg Number) [Description] This parameter represents the maximum branch number of reverse SCH soft
handoff target set.
[Type] Internal algorithm parameter
[Range and unit] 1--6
[Operating range] 1--6
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[Recommended value] 3, which should not be modified
[Setting tradeoff] If this parameter is set large, SCH soft handoff ratio increases to occupy more
forward resources and waste forward capacity. If this parameter is set small,
SCH soft handoff ratio decreases. But you cannot utilize rationally soft handoff
gain to decrease data service transmission performance.
SCHTADD (SCH Soft Handoff Tadd) [Description] This parameter defines a prerequisite that BSC adds each branch in the FCH
activation set to SCH activation set. And then judge forward/reverse SCH
activation set after the prerequisite.
[Type] Internal algorithm parameter
[Range and unit] -63--0, Unit: -0.5dB
[Operating range] -24 -- -28
[Recommended value] -28
[Setting tradeoff] SCHEXTSW (SCH Extension Switch) [Description] This parameter represents whether to enable SCH extension function.
[Type] Internal algorithm parameter
[Range and unit] 0 and 1,0---Off,1--ON.
[Operating range] 0 and 1
[Recommended value]
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1
[Setting tradeoff] SCHEXTDURATION (SCH Extension Duration) [Description] This parameter represents duration size adopted by forward SCH extension.
[Type]
Internal algorithm parameter
[Range and unit] 4--14,For details, see table 5-1.
[Operating range] 4--14
[Recommended value] 10, that is 32 frames, which should not be modified
[Setting tradeoff] SCHEXTOVERLAP (SCH Extension Overlap) [Description] This parameter represents two neighbour overlay durations of forward SCH
extension.
[Type]
Internal algorithm parameter
[Range and unit] 0--31, Unit: frame
[Operating range] 0--31
[Recommended value] 2, that is 2 frames, which should not be modified
[Setting tradeoff] If this parameter is set large, the more two neighbour Durations overlay, the
lower the utilization of each Duration and the lower the extension efficiency.
Vice versa. If this parameter is set to 0, two neighbour Durations cannot
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overlay, the higher the utilization of each Duration and the higher the
extension efficiency.
SCHEXTREQBUFFSW (SCH Extension Request Buffer Switch) [Description] This parameter represents whether to buffer SCH extension request.
[Type] Internal algorithm parameter
[Range and unit] 0 and 1, 0--Off 1--ON
[Operating range] 0 and 1
[Recommended value] 1-ON
[Setting tradeoff] JUDGETIMEOS (SCH Extension Judge Time Offset) [Description] This parameter that the number of frames to be processed for buffered SCH
extension request before the former SCH completes.. If the specified time
exceeds, this extension request is not processed again. This parameter is
used to determine whether the completion of extension request is earlier than
current SCH release.
[Type] Internal algorithm parameter
[Range and unit] 0--31, Unit: frame
[Operating range] 0--31
[Recommended value] 3, that is, 3 frames, which should not be modified
[Setting tradeoff]
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SCHEXTMAXTIMES (SCH Extension Maximum Times) [Description] This parameter represents maximum SCH extension times.
[Type] Algorithm parameter
[Range and unit] 0--65535, Unit: times
[Operating range] 0--65535,
[Recommended value] 100.
[Setting tradeoff] Because forward SCH extension is obtained at high cost of inequality, it is the
extension of certain subscriber. For the subscriber downloading data, the
larger the parameter, the better the data transmission performance, but the
data request and transmission of other subscribers may be affected.
5.4 Service Redirection Parameters (SR_CFG) [Command name] MOD SRCFG (Algorithm Configuration/Modify Service Redirection
Parameter)
PLTTP (Pilot Type)
[Description]
This parameter represents the type of the current carrier. The MS determines
how to redirect the service according to the type of the current carrier.
0 – The current system is IS95A/95B cell, that is to say, the service will be
redirected to the IS2000 MS.
1 – The current system is the IS2000 cell, that is to say, the service will be
redirected to the IS95A/95B MS.
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2 – The current system is the IS95A/IS2000 hybrid cell, that is to say, the
service will be redirected to the IS95B MS.
3 – The current system is the IS95A/IS95B/IS2000 hybrid cell, that is to say,
the service will not be redirected between different types of cells.
[Type]
(SRDM)
[Range and unit]
0~3. 0 – IS95A/95B cell, 1 – IS2000 cell, 2 – IS95A/IS2000 hybrid cell, 3 –
IS95A/95B/IS2000 hybrid cell
[Operating range]
0-3
[Recommended value]
This parameter should be configured according to the actual requirements.
[Setting tradeoff]
None
SRCELLTPSW (Re-direct Service Based on Local Cell Type)
[Description]
This parameter should be used together with the above parameter PLTTP. Only
when the switch is enabled, can the service be redirected according to the cell
type determined by the parameter PLTTP.
[Type]
Algorithm parameter
[Range and unit]
0~1. 0 – Off, 1 – ON
[Operating range]
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0~1
[Recommended value]
This parameter should be configured according to the actual requirements.
[Setting tradeoff]
None
SRLOADSW (Re-direct Upon Congestion Switch)
[Description]
This parameter defines whether the service will be redirected upon congestion.
[Type]
Algorithm parameter
[Range and unit]
0~1. 1 – Yes, 0 – No
[Operating range]
0~1
[Recommended value]
This parameter should be configured according to the actual requirements.
[Setting tradeoff]
None
SRSW1 (Re-direct Illegal MS Switch)
[Description]
This parameter defines whether the illegal MS will be redirected.
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[Type]
Algorithm parameter
[Range and unit]
0~1. 1 – Yes, 0 – No
[Operating range]
0~1
[Recommended value]
This parameter should be configured according to the actual requirements.
[Setting tradeoff]
None
SRSID (System ID)
[Description]
This parameter defines that the MS will be redirected to a specific system (SID).
If the SID is “0”, it means that the MS will not be redirected.
[Type]
Um interface parameter (SRDM).
[Range and unit] Integral of 15bit
[Operating range] 0-2^15
[Recommended value] If the MS needs to be redirected to a specific system (SID), the value of this
parameter will be set as the SID. Otherwise, it will be set to “0”.
[Setting tradeoff] None
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SRNID (Network ID) [Description] If the MS needs to be redirected to a specific network (NID), the BTS will set
the value of this parameter as the NID. Otherwise, the BTS will set this
parameter to “65535”.
[Type] Um interface parameter (SRDM)
[Range and unit] 16bit
[Operating range] 16bit.
[Recommended value] This parameter should be configured according to the actual requirements
[Setting tradeoff] None
BANCLS (Band Class)
[Description]
This parameter is used to configure the band class of the target cell of the
redirection
[Type] Um interface parameter (SRDM)
[Range and unit] 0 ~ 9
[Operating range] 0 ~ 9
[Recommended value] This parameter should be configured according to the actual requirements
[Setting tradeoff] None
SRFREQX (Re-direct Service Target Frequency X)
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[Description] These parameters are used to configure the target frequency for the
redirection. There are 6 target frequencies that can be configured for the
redirection, that is to say, parameters SR_FREEQ_1, 2, 3, 4, 5 and 6 can be
configured. The valid value is from 0 to 2047. These parameters should be set
to “65535 if no frequency is configured for the redirection.
[Type] Um interface parameter
[Range and unit]
0~2047 (valid frequencies) and 65535 (invalid target frequency)
[Operating range] 0~2047,65535.
[Recommended value] This parameter should be configured according to the actual requirements
[Setting tradeoff] Redirect frequency configuration of target cell according to actual
requirements.
6. System Messages
Configure all the tables based on sector carriers.
6.1 Synchronization Channel Message (SCHM) [Command name]
MOD SYSCMSG (New Command: MOD SCHM) (Modify SCHM)
LOCTMOFF (Local Time Offset) [Description] This parameter indicates the local time zone, namely, the offset of the local
time to the Greenwich Mean Time (GMT). China is located at GMT+8, the
LOCTMOFF sent through SCHM becomes 16 (16*30 minutes=8 hours).
Some countries still adopt the daylight saving time system. In fact, there is no
special-purpose field in the chip of Qualcomm to realize the daylight saving
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time. If necessary, the daylight saving time can be realized only by modifying
the parameter LOCTMOF. If daylight saving time system is adopted at
GMT+8, one hour is faster, that is, configure 50 at LOCTMOF, namely,
GMT+9.
[Type]
Um interface parameter (SCHM)
[Range and unit]
0~63 (corresponding to -32 ~ 31) (unit: 30 minutes)
[Operating range]
0~ 63
[Recommended value]
48, namely, corresponding to 16 which represents Time Zone GMT+8.
[Setting tradeoff]
This parameter should be configured according to the time zone where the
system lies.
PRAT (Paging Channel Rate) [Description] This parameter represents paging channel rate. When this value is modified,
modify power allocation of paging channel correspondingly. For details, see
section Paging Channel Gain of Forward Power Allocation.
[Type] Um interface parameter (SCHM)
[Range and unit] 0~3:00 (corresponding rate: 9600bps); 01(corresponding self-rate: 4800bps).
10-Reserved, 11-reserved
[Operating range] 9600/4800bps
[Recommended value] 9600bps
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[Setting tradeoff] This parameter is determined by paging channel capacity and forward link
service capacity requirements. Full rate is set at the cost of partial forward link
capacity to enhance paging channel capacity. If self-rate is used, paging
capacity decreases accordingly but service capacity of forward link increases.
CDMABSN (CDMA Channel No.)
[Description]
This parameter is used to assign frequencies and it represents the
corresponding CDMA channel number of the carrier frequency. The IS95 MS
uses this field.
[Type]
Um interface parameter (SCHM)
[Range and unit]
0~ 2047
[Operating range]
0~ 2047
[Recommended value]
This parameter should be configured according to the carrier frequency which
the IS95 MS is expected to use. If there is no special requirement for the
frequencies which the IS95 MS and IS2000 MS should use in the networking,
any normal carrier frequency under this sector can be configured.
[Setting tradeoff]
None
EXTCDMABSN (Extended CDMA Channel No.)
[Description]
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This parameter is used to extend the assigned frequency and it represents the
corresponding CDMA channel number of the carrier frequency. The IS2000 MS
uses this field.
[Type]
Um interface parameter (SCHM)
[Range and unit]
0~ 2047
[Operating range]
0~ 2047
[Recommended value]
This parameter should be configured according to the carrier frequency which
the IS2000 MS is expected to use. If there is no special requirement for the
frequencies which the IS95 MS and IS2000 MS should use in the networking,
any normal carrier frequency under this sector can be configured.
[Setting tradeoff]
None
6.2 System Parameters Message (SPM) [Command name] MOD SPM (Modify System Parameter Message)
REGZN (Registration Zone) [Description]
This parameter represents the registration zone code of the sector. The
registration zone code also represents a group of BTSs with a given SID and
NID. The MS can get registered in more than one registration zone, which is
uniquely identified by SID, NID and REGZN. For details, see
IS2000-5(2.6.5.1.5).
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[Type] Um interface parameter (SPM/ MSRM).
[Range and unit] 0x000~0xFFF (0 ~ 4095)
[Operating range] 0 ~ 4095
[Recommended value] 0-If the MS is to be registered by zone, the parameter should be configured
according to the assigned zone code.
[Setting tradeoff]
When setting a registration zone code, note that if the area of a registration
zone is set too large, the paging overhead may be so large that the paging
capacity could be insufficient, especially when there are many short messages.
On the other hand, if the area of a registration zone is too small, the paging
overhead will decrease while the paging capacity of the system will increase.
But the registrations will be so frequent that the reverse capacity will be
affected. Especially on the border of the registration zone, the mobile
terminated call and the access of the MS will become difficult.
TOTALZN (Number of Total Registration Zones to be Retained)
[Description]
This parameter represents the total number of registration zones that can be
reserved for the MS in the zone-based registration. The zone-based
registration is a basic registration method in the commercial network. Through
the zone-based registration, a location update can be originated in time when
the MS moves from one REGZN to another REGZN. In this way, the new
location of the MS can be learned in time at the network side. The MSC pages
the MS according to the Location Area Code (LAC). The division of ZONEs can
be kept consistent with the LAC.
[Type]
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Um interface parameter (SPM/ MSRM)
[Range and unit]
0~7. “0” means that the zone-based registration is prohibited.
[Operating range]
0~ 7
[Recommended value]
1 ---If the zone-based registration is adopted, this parameter should be
configured as a nonzero.
[Setting tradeoff]
If this parameter is set more than “1”, the frequent registration of the MS on the
border of the registration zone can be avoided, but the location may fail to be
updated in time.
ZNTMR (Zone Timer Length)
[Description]
The MS will save the REGZN in the SPM into the ZONE list. If the MS fails to
receive the message containing REGZN within the time stipulated by this
parameter, the MS will delete this REGZN. Only when the zone-based
registration is used, that is, TOTALZN is not “0”, can this parameter take effect.
[Type]
Um interface parameter (SPM/ MSRM)
[Range and unit]
0-7, which correspond to the actual duration in the table below, respectively
Table 6-1 Zone Timer Value
Value (binary) Timer duration
(minute)
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000 1
001 2
010 5
011 10
100 20
101 30
110 45
111 60
[Operating range]
0~ 7
[Recommended value]
2, namely, 5 minutes
[Setting tradeoff]
When TOTALZN is set more than “1”, this parameter can be set small so as to
lessen the effect on the paging.
MSID (Multiple SID Storage Indicator)
[Description]
This parameter indicates whether the MS is allowed to save SIDNIDLIST with
different SIDs.
[Type]
Um interface parameter (SPM).
[Range and unit]
0~1. 1– Yes, 0 – No
[Operating range]
0~1
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[Recommended value]
0
[Setting tradeoff]
None
MNID (Multiple NID Storage Indicator)
[Description]
This parameter indicates whether the MS is allowed to save SIDNIDLIST with
the same SID but different NIDs.
[Type]
Um interface parameter (SPM).
[Range and unit]
0~1. 1 – Yes, 0 – No.
[Operating range]
0~1
[Recommended value]
0
[Setting tradeoff]
None
MAXTSPRDIDX (Max Slot Timer Index)
[Description]
This parameter represents the maximum timeslot cycle index in the slotted
mode of the paging channel. The timeslot cycle = 1.28*2^i. The MS has the
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parameter SPRDIDX, namely, preferred slot cycle index. The timeslot cycle
index (i) practically used is the smaller one of these two parameters.
[Type]
Um interface parameter (SPM).
[Range and unit]
0~ 7
[Operating range]
0~2
[Recommended value]
1
[Setting tradeoff]
When this parameter is set small, the call setup delay can be reduced, but the
power consumption of the MS will increase, so the standby time is shortened.
On the contrary, the call setup delay is prolonged, but the power consumption
of the MS will decrease. If CCHINFOINCL is set to “1”, the BTS must contain
this field. Otherwise, it will neglect this field.
HOMEREG (Home Registration Indicator)
[Description]
This parameter indicates whether a non-roaming MS is allowed to be registered.
When this parameter is set to “1” and MOBTERMHOME (This parameter
means that the mobile terminated call indication is allowed in the home cell and
it is set in the MS) is also set to “1”, a non-roaming MS can automatically be
registered. The automatic registration includes power-up registration,
power-down registration, timer-based registration, zone-based registration and
distance-based registration.
[Type]
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Um interface parameter (SPM).
[Range and unit]
0~1. 1 – Yes, 0 – No.
[Operating range]
1, namely, the home registration is usually started
[Recommended value]
1
[Setting tradeoff]
None
FORSIDREG (SID Roamer Registration Indicator)
[Description]
This parameter indicates whether an MS roaming from other system is allowed
to be registered. When this parameter is set to “1” and MOBTERMFORSID
(This parameter is set in the MS) is also set to “1”, the MS roaming from other
system can automatically be registered. The automatic registration includes
power-up registration, power-down registration, timer-based registration,
zone-based registration and distance-based registration.
[Type]
Um interface parameter (SPM).
[Range and unit]
0~1. 1 – Yes, 0 – No.
[Operating range]
0~1
[Recommended value]
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1
[Setting tradeoff]
The setting of this parameter depends on whether a roaming MS is allowed to
be registered.
FORNIDREG (NID Roamer Registration Indicator)
[Description]
This parameter indicates whether an MS roaming from a foreign network is
allowed to be registered. When this parameter is set to “1” and
MOBTERMFORNID (This parameter is set in the MS) is also set to “1”, the MS
roaming from a foreign network can automatically be registered. The automatic
registration includes power-up registration, power-down registration,
timer-based registration, zone-based registration and distance-based
registration.
[Type]
Um interface parameter (SPM).
[Range and unit]
0~1. 1 – Yes, 0 – No.
[Operating range]
0~1
[Recommended value]
1
[Setting tradeoff]
The setting of this parameter depends on whether a roaming MS is allowed to
be registered.
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PWRUP (Power-up Registration Indicator)
[Description]
This parameter indicates whether the power-up registration is allowed, that is,
whether the MS is allowed to automatically get registered once it is powered up
and receives the system message. If this parameter is set to “1”, the MS can
automatically get registered. If it is set to “0”, the MS can not. To avoid multiple
registrations due to the quick power-up and power-down, the MS needs to wait
20 seconds to originate a registration after it enters the idle state.
[Type]
Um interface parameter (SPM).
[Range and unit]
0~1. 1 – Yes, 0 – No.
[Operating range]
1
[Recommended value]
1
[Setting tradeoff]
None
PWRDWN (Power-down Registration Indicator)
[Description]
This parameter indicates whether the power-down registration is allowed, that
is, whether the MS is allowed to automatically get registered when switching
off.. If this parameter is set to “1”, the MS can automatically get registered. If it
is set to “0”, the MS can not. If the MS is not registered in the current system
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and network, it can not be performed the power-down registration. The MS
performs the power-down registration before it is really powered down.
[Type]
Um interface parameter (SPM).
[Range and unit]
0~1. 1 – Yes, 0 – No.
[Operating range]
1----Enabled for test
[Recommended value]
1
[Setting tradeoff]
None
PRMREG (System Message Parameter- Change Registration Indicator)
[Description]
This parameter indicates whether the parameter-change registration is allowed,
that is, whether the MS is allowed to automatically get registered when some
specific parameters saved in the MS are changed or when the MS enters a
new system. If this field is set to “1”, it means that the parameter-change
registration is allowed. If it is set to “0”, it means that the parameter-change
registration not allowed. These specific parameters set in the MS include:
1) SLOT_CYCLE_INDEX
2) BTS class mark (SCMp)
3) Mobile terminated call indication allowed (MOB_TERM_HOMEp
/MOB_TERM_FOR_SIDp/ MOB_TERM_FOR_NIDp )
4) The Band class, power level and RCs that the MS support.
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In addition, the MS will perform the parameter-change registration as long as
the SID and NID in the SID_NID_LISTs saved in the MS do not match with
those of the BTS. Once the parameters are changed, the MS will delete all
SID_ NID_LISTs.
[Type]
Um interface parameter (SPM).
[Range and unit]
0~1. 1 – Yes, 0 – No.
[Operating range]
0/1
[Recommended value]
1
[Setting tradeoff]
None
REGPRD (Time-Based Registration)
[Description]
This parameter represents the period of the timer-based registration of the MS.
The registration period = 2^(REG_PRD/4) 0.08 seconds. This parameter
means that the timer-based registration is not used if it is set to “0”. These
registration methods required by the protocols are used in co-ordination with
each other. The MS uses the timer-based registration only when a MS location
is not updated for a long time and the MS would be deactivated by the MSC if
the MS is not registered yet. But the MS will use other registration methods,
such as zone-based registration and parameter-change registration, when it
moves between location areas.
[Type]
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Um interface parameter (SPM).
[Range and unit]
0~85
[Operating range]
0 and 29~ 85
[Recommended value]
62 seconds, approximately one hour
[Setting tradeoff]
The registration period of this parameter corresponds with one fourth to one
third of the length of the deactivation timer configured at the MSC side.
Otherwise, the MS can not be paged because it is deactivated by the MSC.
BASELAT (BS Latitude)
[Description]
This parameter represents the latitude of the BTS in the format of degrees &
minutes & seconds, where “+” represents North latitude and “-“ South latitude.
[Type]
Um interface parameter (SPM).
[Recommended value]
This parameter should be configured according to the actual latitude.
[Setting tradeoff]
The latitude must be accurate.
BASELONG (BS Longitude)
[Description]
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This parameter represents the BTS longitude in the format of degrees &
minutes & seconds, where “+” represents east longitude and “-“ west longitude.
The minimum unit of second is 0.25 seconds.
[Type]
Um interface parameter (SPM).
[Recommended value]
This parameter should be configured according to the actual longitude.
[Setting tradeoff]
The longitude must be accurate.
.
REGDIST (Distance-based Registration)
[Description]
This parameter represents the distance threshold and is used for the
distance-based registration. If the distance, between the location determined by
the latitude and longitude saved by the MS for the last registration and the
location determined by the latitude and longitude in the system message,
exceeds the threshold REGDIST, the MS will originates a registration.
[Type]
Um interface parameter (SPM).
[Range and unit]
0~2047. “0” means that the distance-based registration is not used.
[Operating range]
0
[Recommended value]
0
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[Setting tradeoff]
None
RESCAN (Re-scan Indicator)
[Description]
If the parameter is set to “1”, the MS will reselect a system and get reinitialized
after receiving the RESCAN message. If the MS still accesses the carrier of the
original sector after the rescan and the RESCAN message is still issued on the
paging channel, the MS will repeat the rescan process. This parameter is an
inherited parameter of the AMPS. Only when the contents in the sync channel
message are changed during the operation process, can this parameter take
effect.
[Type]
Um interface parameter (SPM).
[Range and unit]
0~1. 0–off, 1–on.
[Operating range]
0
[Recommended value]
0
[Setting tradeoff]
None
6.3 System Message Control Parameters (SYS_MSG_CTRL_INFO) [Command name] This command is executed to modify overhead message control parameters,
such as types of the overhead messages to be sent.
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EXTNBRLST (Extended Neighbour List Message Send Indicator)
[Description]
If the “EXTNBRLST” needs to be sent on the paging channel, this parameter
should be set to “1”. Otherwise, it should be set to “0”.The extended neighbour
list message is used for Band Class 1, instead of Band Class 0.
When the BNDCLS of the BTS is 1, 3 and 4, and the lowest protocol version is
less than 6, this parameter should be set to “1”. Otherwise, it should be set to
“0”. This parameter should be set according to the actual networking
requirement.
[Type]
Um interface parameter (SPM).
[Range and unit]
0/1 (off/on)
[Operating range]
0/1
[Recommended value]
0
[Setting tradeoff]
None
GENNBRLST (General Neighbour List Message Send Indicator)
[Description]
If the Neighbour List Message Indicator needs to be sent on the paging channel,
this parameter should be set to “1”. Otherwise, it should be set to “0”. The
neighbour cells of different frequencies can be designated by the general
neighbour list message. If there are neighbour cells of different frequencies in
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the network, and the inter-frequency idle handoff is necessary, this parameter
should be set to “1”.
[Type]
Um interface parameter (SPM).
[Range and unit]
0/1 (off/on)
[Operating range]
0/1
[Recommended value]
0 (This parameter should be set to “1” for 450MHz cell.)
[Setting tradeoff]
None
GLBRDRCT (Global Service Redirection Message Send Indicator)
[Description]
If the “global service redirection message” needs to be sent on the paging
channel, this parameter should be set to “1”. Otherwise, it should be set to “0”.
After the MS receives the global service redirection message, it will leave the
current sector carrier and attempt to access a new channel according to the
contents in the message. This parameter can be used in the following cases: 1.
The current carrier is being maintained. 2. The current carrier is being
accessed or the traffic channel is overloaded. Only when the BTS version is 6
or above, can this system message be sent (Of course, the matching versions
of the BTS should be confirmed.)
[Type]
Um interface parameter (SPM).
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[Range and unit]
0/1 (off/on)
[Operating range]
0/1
[Recommended value]
0
[Setting tradeoff]
None
EXTGLBRDRCT (Extended Global Service Redirection Message Send Indicator)
[Description]
This parameter should be set to “1” if the “extended global service redirection
message” needs to be sent on the paging channel. Otherwise, it should be set
to “0”. Only when the BTS version is 6 or above, can this system message can
be sent (Of course, the matching versions of the BTS should be confirmed)
[Type]
Um interface parameter (SPM).
[Range and unit]
0/1 (off/on)
[Operating range]
0/1
[Recommended value]
0
[Setting tradeoff]
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None
EXTCHANLST (Extended CDMA Channel List Message Send Indicator)
[Description]
This parameter should be set to “1” if the “extended CDMA channel list
message” needs to be sent on the paging channel. Otherwise, it should be set
to “0”.
If the Extended CDMA Channel List Message (ECCLM) is to be sent, the
IS2000 MS uses the frequency list HASH in the ECCLM, while the IS95 MS still
uses the frequency list in the CDMA Channel List Message (CCLM). In this way,
the different carriers respectively used by IS2000 MS and IS95 MS can be
controlled.
[Type]
Um interface parameter (SPM).
[Range and unit]
0/1 (off/on)
[Operating range]
0/1
[Recommended value]
0
Setting tradeoffs:
None
6.4 Access Parameter Message (APM) [Command name]
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MOD APM (Base Station Controller Management\Configuration
Management\System Message Configuration\Modify Access Parameter
Message)
NOMPWR (Nominal Transmit Power Offset)
[Description]
This is an open loop power control parameter which represents the transmit
power offset. The MS uses this parameter to calibrate the estimated access
initial power at the time of the open loop power control. (Refer to INIT_PWR
(access initial power)).For the NOMPWREXT, see [Description] in the APM.
[Type] Um interface parameter (APM/UHDM/GHDM).
[Range and unit] -8 ~ 7, Unit: dB
[Operating range] -8 ~ 7(dB).
[Recommended value] 0
[Setting tradeoff] If this parameter is set large, the reverse initial transmit power will be high,
and additional interference will be brought to the reverse link. If the parameter
is set small, the power of the initial access probe will be so low that the BTS is
unable to receive it correctly, and the access rate and access success ratio
will be affected.
INITPWR (Access Initial Power Offset) [Description]
This is an open loop power control parameter which decides the initial transmit
power offset of the power probe frame. The parameter physically means that
the power of the first access probe frame can be adjusted so that the transmit
power could be slightly lower than the required power. The value of the
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parameter can partially compensate the path loss difference caused by the
occasional dependency between forward and reverse CDMA channels.
[Type] Um interface parameter (APM)
[Range and unit] -16 ~ 15, Unit: dB.
[Operating range] -3~3
[Recommended value] 0
[Setting tradeoff] The setting of this parameter should vary with the actual load. If the parameter
is set too large, the reverse capacity will be shocked and there will be a large
power redundancy. If the parameter is set too small, the access of the MS can
succeed only after multiple access probes. As a result, the access time of the
MS will be prolonged, or even the access may fail.
PWRSTEP (Power Control Step) [Description] This parameter represents the power increase necessary for the next access
probe when the previous access probe fails, namely, the power increase
between two sequential access probes. The number of access probes times
the access control step is the actual transmit power used for the access of the
MS.
[Type] Um interface parameter (APM)
[Range and unit] 0~7(dB)
[Operating range] 2~5 (The value of this parameter can not be greater than 5
[Recommended value] 5.
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[Setting tradeoff] If the parameter is set too large, the reverse transmit power may be so high
that the reverse interference could be intensified. If the parameter is set small,
the access of the MS can succeed only after multiple access probes.
NUMSTEP (Number of Access Probes)
[Description]
This parameter is used to set the number of access probes allowed in each
access probe sequence. The number of allowed access probes is NUMSTEP
plus 1.
[Type]
Um interface parameter (APM)
[Range and unit]
0~ 15
[Operating range]
3~6, that is to say, 4~7 access probes are allowed in each access sequence.
[Recommended value]
4
[Setting tradeoff]
The larger the value of this parameter is, the higher the access success ratio of
an access probe sequence is. But the reverse link interference may be
intensified accordingly. The access failure may be caused by the collision.
Furthermore, if the access fails, the call attempt interval will be longer. The
parameters NUMSTEP, PWRSTEP and INITPWR jointly decide the access
performance.
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PSIST09 (Persistence Value for Access Overload Classes 0-9)
[Description]
This parameter represents the persistence value of the access load classes
0~9 of a normal call and determines the threshold P of the persistence
detection of the MS. The access attempt must pass the persistence detection
(For details, refer to IS95A-C6). According to the parameter P, the MS will
perform the pseudo random persistence detection in each timeslot after the
delay RS (A random number RP between 0 and 1 will be generated in each
timeslot. If RP < P, the access attempt will pass the detection. If the access
attempt passes the detection, the first access probe in the access probe
sequence will be sent in this timeslot. Otherwise, the MS will delay the access
probe sequence to the next timeslot to perform the detection. When P = 0, it
means the access probe fails. When the access channel request is not
originated when the MS performs a registration or sends an origination
message, P is calculated as follows:
[Type]
Um interface parameter (APM/EAPM)
[Range and unit]
0~ 63
[Operating range]
0~ 63
[Recommended value]
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0
[Setting tradeoff] If this parameter is set to 0, MS accesses the system to perform persistence
detection. When the traffic load is too heavy, the increase of values of this
group of parameters will prolong the delay of access attempts and reduce the
access collisions.
PSIST1015 (Persistence Value for Access Overload Classes 10-15)
[Description]
This parameter represents the persistence value of the access load classes
10~15 of an emergency call and determines the threshold P of the persistence
detection of the MS. Refer to the description of PSIST09.
[Type]
Um interface parameter (APM/EAPM)
[Range and unit]
0~ 7
[Operating range]
0~ 7
[Recommended value]
0
[Setting tradeoff]
After the traffic load becomes too heavy, the access rate of emergency calls
can remain unchanged, even though this group of parameters for emergency
call is not changed.
MSGPSIST (Persistence Modifier for Message Transmissions)
[Description]
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This parameter represents the message transfer persistence correction value
during the access probe. Refer to the description of PSIST09. P*2 -MSG_PSIST will
be compared with RP during the access attempt for the message transfer.
[Type]
Um interface parameter (APM)
[Range and unit] 0~ 7
[Operating range]
0~ 7
[Recommended value]
0
[Setting tradeoffs]
None
REGPSIST (Persistence Modifier for Registrations)
[Description]
This parameter represents the access attempt message persistence correction
value during the registration (non-response registration request order). Refer to
the description of PSIST09. P* 2 -REG_PSIST will be compared with RP during the
access attempt for the message transfer.
[Type]
Um interface parameter (APM/EAPM)
[Range and unit]
0~ 7
[Operating range]
0~ 7
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[Recommended value]
0
[Setting tradeoff]
If this parameter is set to 0, MS accesses the system to perform REG_PSIST
immediately.
PRBPNRAN (Time Randomization for Access Channel Probes)
[Description]
This parameter is used to calculate the PN randomization delay. During one
access attempt, the precise transmission time of the access channel depends
on the PN randomization process. The transmission of the MS starts RN PN
chips later than the system time. RN is calculated from the HASH function and
ranges from 0 to 2 PROBE_PN_RAN-1 chips.
[Type]
Um interface parameter (APM)
[Range and unit]
0~ 9
[Operating range]
0~ 1
[Recommended value]
0
[Setting tradeoff]
When the reverse load is heavy, the access collisions can be reduced by
increasing the value of this parameter.
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ACCTMO (Acknowledgement Timeout)
[Description]
This parameter represents the access probe response timeout time. After
(2+ACCTMO) 80ms, it will be considered that the BTS does not receive the
access channel message. The time between the basic access and response is
about 350ms, so this parameter is usually set to “3”.
[Type]
Um interface parameter (APM)
[Range and unit]
0~ 15 (unit: 80ms)
[Operating range]
2~ 5
[Recommended value]
3
[Setting tradeoff]
If the parameter is set too small, the MS will again send another access probe
request before receiving the response from the BTS. As a result, the load of the
access channel and the probability of collision will increase and the reverse link
interference will also be intensified. If the parameter is set too large, the access
process will be prolonged when an access attempt requires multiple access
probes.
PRBKOFF (ACH Probe Backoff Range) [Description] This parameter represents the maximum delay between access probes in an
access probe sequence. Common channel multiplex sublayer sends all the
access probes in an access sequence on the same R-ACH of current F-PCH,
send next access probe after an additional RT delay. Wherein, RT is
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generated randomly from slots (0,1+PRBBKOFF). If common channel
multiplex sublayer selects randomly one from all the R-ACHs corresponding to
current F-PCH to send access probe, additional delay RT of next access
probe is generated randomly from slots (0,1 + PRBBKOFF).
[Type]
Um interface parameter (APM)
[Range and unit]
0~ 15 (1~16 timeslots at most)
[Operating range]
0~1 (1~2 timeslots at most)
[Recommended value]
0 (one timeslot at most)
[Setting tradeoff]
If the parameter is set too large, the access of the MS will be delayed in the
case that each access attempt consists of many access probes. If the
parameter is set too small, the probability of access probe collisions will
increase when the system load is heavy. If the system load is light, the
parameter can be set small. Otherwise, it can be set large.
BKOFF (ACH Probe Sequence Backoff Range)
[Description]
This parameter represents the maximum delay of sending an access probe
sequence -1. For an access probe sequence other than the first one, there is a
sequence delay RS, which is generated at random in (0, 1+BKOFF) timeslots.
[Type]
Um interface parameter (APM)
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[Range and unit]
0~ 15 (1~16 timeslots at most)
[Operating range]
0~1 (1~2 timeslots at most)
[Recommended value]
0 (one timeslot at most)
[Setting tradeoff]
If the parameter is set large, the access collisions will be reduced but the
access of the MS will be delayed when the reverse traffic load is heavy.
MAXREQSEQ (Max. Number of Probe Sequences for an ACH Request)
[Description]
This parameter represents the maximum number of access probe sequences
of an access channel request (for example, origination).For an access probe
sequence other than the first one, there is a sequence delay RS, which is
generated at random in (0, BKOFF) timeslots.
[Type]
Um interface parameter (APM/EAPM)
[Range and unit]
1~ 15
[Operating range]
2~3
[Recommended value]
2
[Setting tradeoff]
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If the parameter is set large, the access success ratio may increase, but the
access channel capacity will be affected. If it is set too small, namely, to “1”, the
access probe sequence will not be re-sent. In view of the fluctuation of the
radio environment, it is recommended to set this parameter to “2” at least,
because the radio environment may get improved when the second access
probe sequence starts, even if the first access probe sequence fails.
MAXRSPSEQ (Max. Number of Probe Sequences for an ACH Response)
[Description]
This parameter represents the maximum number of access probe sequences
of an access channel response (for example, paging response).For an access
probe sequence other than the first one, there is a sequence delay RS, which is
generated at random in (0, BKOFF) timeslots.
[Type]
Um interface parameter (APM/EAPM)
[Range and unit]
1~ 15
[Operating range]
2~3
[Recommended value]
2
[Setting tradeoff]
Refer to max. number of probe sequences at access channel request.
NOMPWREXT (Extended Nominal Transmit Power Indicator)
[Description]
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This parameter represents the extended nominal power used in the open loop
power estimation. This parameter together with the nominal power (NOM_PWR)
is used to calibrate the offset of the BTS transmit power relative to the nominal
power.
[Type]
Um interface parameter (APM/UHDM/GHDM)
[Range and unit]
0~1. 0 – No (Not send), 1 – Yes (Send)
[Operating range]
0~1
[Recommended value]
0
[Setting tradeoff]
None
PSISTEMGINCL (Emergency Call Persistence Value Included)
[Description]
This parameter represents the emergency call persistence correction indicator,
which indicates whether the access attempt persistence of the MS whose
access load class is 0 ~9 is allowed to be corrected in emergency calls.
[Type]
Um interface parameter (APM)
[Range and unit]
0/1
[Operating range]
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0/1
[Recommended value]
0
Setting tradeoffs:
None
PSISTEMG (Emergency Call Persistence Values for Access Overload Classes 0-9)
[Description]
This parameter represents the persistence correction value of the MS whose
access load class is 0~9 in emergency calls. If PSISTEMGINCL is set to “0”,
this parameter will be invalid. When PSISTEMGINCL is set to “1”, this
parameter should be set to “0” if the MS whose access load class is 0~9 is
allowed to transfer emergency call requests on the access channel. This
parameter should be set to “7” if no emergency call is allowed.
[Type]
Um interface parameter (APM)
[Range and unit]
0/1
[Operating range]
0/1
[Recommended value]
0
[Setting tradeoff]
None
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6.5 Access Channel Parameters (A_CH) [Command name] MOD ACH (Base Station Controller Management\Configuration
Management\Cell Channel Management\ Modify Access Channel Parameter)
PCN (PCH No.) [Description]
This parameter constitutes the index of this table, together with module ID and
pilot number.
[Range and unit] 1--7
[Operating range] 1--7
[Recommended value] Configure one record of this table based on the number of paging channel
configured.
[Setting tradeoff] None
ACHNUM (Number of Access Channels) [Description] The parameter represents the number of access channel related to each
paging channel.
[Type] Um interface parameter (APM)
[Range and unit] 1~32
[Operating range] 1
[Recommended value] 1 , that is one access channel
[Setting tradeoff] None
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MAXLEN (Max. Message Length) [Description] The value of this parameter is the allowable maximum number of
frames that each access channel message can contain minus 3
[Type] Um interface parameter, APM
[Range and unit] 0~7 (3~10 frames)
[Operating range] 0~7. Each access channel message contains 3 ~ 10 access channel frames
[Recommended value] 3 or 4, that is, The allowable maximum number of frames each message can
contain 6 or 7.
[Setting tradeoff] If the value is set too small, larger access channel messages, such as the
origination message containing many dialed digits or Data Burst Message,
can not be sent. If the value is set too large, larger access channel messages
are allowed to be transmitted. Since it takes a long time to send these
messages, more message collisions will take place on the access channel
and the access channel capacity will decrease.
PAMLEN (Header Length)
[Description]
This parameter represents the preamble length of the access channel minus 1.
[Type]
Um interface parameter (APM)
[Range and unit]
0~15 (1~16 frames)
[Operating range]
2~3 (3~4 frames)
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[Recommended value]
3 (4 frames), namely, the allowable maximum number of preamble frames that
each message can contain is 4.
[Setting tradeoff]
If the parameter is set too large, the access channel capacity will be wasted,
because (1+PAM_SZ) frames do not contain message contents. Maybe fewer
frames are enough for the BTS to capture the MS. If the parameter is set too
small, the probability of the BTS successfully detecting the MS will decrease.
As a result, the MS will resend the message for more times. The message
retransmissions may be doubled. This parameter adjustment is related to
search window size that BTS captures access channel.
6.6 Extended System Parameter Message (ESPM) [Command name] MOD ESPM (Base Station Controller Management\Configuration
Management\System Message Configuration\Modify ESPM)
PMSIDTP (Preferred ACH MS ID Type)
[Description]
This parameter represents the preferred MS identifier type. IMSI and ESN are
used to identify the MS.
[Type]
Um interface parameter (ESPM)
[Range and unit]
0~3.
[Operating range]
0~3
[Recommended value]
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3
[Setting tradeoff]
None
BCIDX (Broadcast Slot Cycle Index)
[Description]
When the periodic broadcast paging is allowed, this parameter is set to any of 1
~7 to identify the broadcast timeslot cycle index. When the periodic broadcast
paging is prohibited, this parameter should be set to “0”. Broadcast period
=1.28 * 2^ i+0.24.
[Type]
Um interface parameter (ESPM/ MCRRPM)
[Range and unit]
0~7. “0” means that the periodic broadcast paging is prohibited.
[Operating range]
0
[Recommended value]
0
[Setting tradeoff]
None
PACKZNID (Data Packet Zone Indicator)
[Description]
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This parameter represents the packet data service zone identification of the
BTS. If the packet data service is supported, this parameter will be set to a
nonzero. Otherwise, the parameter is set to “0”.
[Type]
Um interface parameter (ESPM)
[Range and unit]
8bit
[Operating range]
8bit
[Recommended value]
This parameter should be configured according to the actual requirements.
MAXALTSRV (Max. Number of Alternative Service Options)
[Description]
This parameter represents the Max. Number of Alternative Service Options and
identifies the maximum number of optional services that the MS is allowed to
select in origination message (ORM) and paging response message (PRM).
[Type]
Um interface parameter (ESPM)
[Range and unit]
0~7
[Operating range]
0~7
[Recommended value]
1
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[Setting tradeoff]
None
RESELINCL (System Re-selection Parameters Included Indicator)
[Description]
This parameter indicates whether the system reselection parameter is included.
If the system reselection parameter is included, the parameter should be set to
“1”. Otherwise, it should be set to “0”.
[Type]
Um interface parameter (ESPM)
[Range and unit]
0/1
[Operating range]
0/1
[Recommended value]
0
Setting tradeoffs:
None
PLTRPT (Pilot Reporting Indicator)
[Description]
If it is necessary for the MS to report the additional pilots whose strength
exceeds TADD in all access channel messages, this parameter should be set
to “1”. If the parameter is set to “0”, these pilots will only be reported in the
ORM and PRM.
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[Type]
Um interface parameter (ESPM)
[Range and unit]
0/1
[Operating range]
0
Recommended value: 0
[Setting tradeoff]
None
NBRSENTRY (Neighbour Set Access Entry HO Information Included Indicator)
[Description]
This parameter should be set to “1” if the neighbour set access switch message
identity is to be included. Otherwise, it should be set to “0”.
[Type]
Um interface parameter (ESPM)
[Range and unit]
0/1
[Operating range]
0/1
[Recommended value]
0
[Setting tradeoff]
None
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ACSHO (Access HO Permitted Indicator) [Description] If NBRSENTRY is set to 1, the BTS includes this record field and set this
value based on the following descriptions. Otherwise, neglect the filed. That is,
if MS is allowed for access entry handoff with command and message
response sub-state, this parameter is set to 1. Otherwise, this parameter is set
to 0.
[Type] Um interface parameter (ESPM)
[Range and unit] 0/1
[Recommended value] 0
[Setting tradeoff] The system does not implement access entry handoff with this status but
supports access entry handoff with paging response sub-state.
NBRSETACSINF (Neighbour Set Access HO Info Included Indicator)
[Description]
If the neighbour set Access Probe HO Permitted is included, this parameter
should be set to “1”. Otherwise, it should be set to “0”.
[Type]
Um interface parameter (ESPM)
[Range and unit]
0/1
[Operating range]
0
[Recommended value]
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0
ACCHO (Access Handoff) [Description] This parameter represents access handoff admission identification. For
example, NBRSETACCINFO is set to 1, the BTS includes this field and set
the value based on the following descriptions. Otherwise, neglect this value. If
MS is allowed to perform access handoff, the value is set to 1. Otherwise, this
value is set to 0.
[Type] Um interface parameter (ESPM)
[Range and unit] 0/1
[Operating range] 0
[Recommended value] 0
[Setting tradeoff] None
ACSPRBHO (Access Probe HO Permitted Indicator) [Description] The parameter represents access probe handoff admission identification.
NBRSETACCINFO is set to 1, the BTS includes this field and set the value
based on the following descriptions. Otherwise, neglect this value. If MS is
allowed to perform access probe handoff, this value is set to 1. Otherwise, this
value is set to 0.
[Type] Um interface parameter (ESPM)
[Range and unit] 0/1
[Operating range] 0
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[Recommended value] 0
[Setting tradeoff] None
NBRSETSIZE (Neighbor Set Pilot Size) [Description] If “NBRSETNTRY” or “NBRSETACCINFO” is set to 1, this parameter is set to
as the number of pilots included in the NLM/ENLM/GNLM by the BTS.
[Type] Um interface parameter (ESPM)
[Range and unit] 0--40
[Operating range] 0--32
[Recommended value] Generated by the system
[Setting tradeoff] None
MAXNUMPRBHO (Max. Number of Access Probe HOs Permitted) [Description] If the system allows for access probe handoff, this parameter must be set,
indicating the maximum times of access probe handoff by MS.
[Type] Um interface parameter (ESPM)
[Range and unit] 1--7
[Operating range] 1--7
[Recommended value] 1, which should not be modified
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[Setting tradeoff]
ACCHOLSTUPD (Access HO List Update Permitted Indicator) [Description] If the system allows to access probe handoff, this parameter should be set,
indicating whether MS updates access handoff list during access probe.
[Type] Um interface parameter (ESPM)
[Range and unit] 0 and 1
[Operating range] 0 and 1
[Recommended value] 0, which should not be modified
[Setting tradeoff]
ACSHO (Access Handoff Permitted Indicator) [Description] If neighbor set access handoff information include identification is set to 1,
and NBRSETSIZE exists, this parameter must be set, indicating that the
identifications whether to allow for access probe handoff and access handoff.
[Type] Um interface parameter (ESPM)
[Range and unit] 0 and 1
[Operating range] 0 and 1
[Recommended value] 0, which should not be modified
[Setting tradeoff] If this parameter is set to 1, ACCPRBHO is set to 1, indicating that paging
response message and origination message are allowed for access probe
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handoff. If this parameter is set to 1, ACCHO is set to 1, indicating that no
response message is allowed for access handoff.
ACCENTRYHO (Access Entry Handoff Indicator) [Description] If neighbor set access entry handoff including identification is set to 1, and
NBRSETSIZE exists, this parameter must be set, indicating that the
identification whether to allow for access entry handoff.
[Type] Um interface parameter (ESPM)
[Range and unit] 0 and 1
[Operating range] 0 and 1
[Recommended value] 0, which should not be recommended
[Setting tradeoff]
ACCHOMSGRSP (ACCESS handoff Message Response Indicator) [Description] This parameter represents the identification whether message to be
responded is allowed for access handoff.
[Type] Um interface parameter (ESPM)
[Range and unit] 0/1
[Operating range] 0
[Recommended value] 0,
Because the system cannot implement access handoff for message to be
responded, this parameter is set to 0.
[Setting tradeoff]
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ACCPRBEHOMSG (Access Probe Handoff Message Indicator) [Description] This parameter represents the label that whether the messages except
origination and paging response messages support access probe handoff.
[Type] Um interface parameter (ESPM)
[Range and unit] 0/1
[Operating range] 0
[Recommended value] 0.
[Setting tradeoff]
BCGPSAUG (Broadcast GPS Assist Indicator)
[Description]
This parameter indicates whether the broadcast GPS assisting capability is
supported. If so, this parameter should be set to “1”. Otherwise, it should be set
to “0”.
[Type]
Um interface parameter (ESPM)
[Range and unit]
0/1
[Recommended value]
0
QPCHSPT (Quick Paging Channel Support Indicator)
[Description]
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This parameter indicates whether QPCH is supported. If the number of quick
paging channels is set to “0”, this parameter should be set to “0”. Otherwise, it
should be set to “1”. If the quick paging channel needs to be used, the MSC
should support it and multiple tables should be configured for the BSC.
[Type]
Um interface parameter (ESPM)
[Range and unit]
0/1
[Operating range]
0/1
[Recommended value]
0
[Setting tradeoff]
If the quick paging channel needs to be supported, this parameter should be
set to “1”.
SDBSPT (SDB Support Indicator)
[Description]
This parameter indicates whether the short data burst is supported.
[Type]
Um interface parameter (ESPM)
[Range and unit]
0/1
[Operating range]
0/1
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[Recommended value]
0
[Setting tradeoff]
If the MS is required to send short data burst on the common channel, this
parameter should be set to “1”.
REVCHGAIN (RTCH Gain Adjustment)
[Description]
This parameter represents the reverse link traffic channel gain relative to the
reverse pilot channel, namely, the offset of output power of the reverse traffic
channel whose rate is above RC2, relative to that of the reverse pilot channel.
The value of this parameter is the correction factor (in 0.125dB) of the reverse
traffic channel power of the MS and it is expressed by complement codes in
binary system.
[Type]
Um interface parameter (ESPM)
[Range and unit]
-32~31 (unit: 0.125dB)
[Operating range]
-32~31 (unit: 0.125dB)
[Recommended value]
0, namely, 0dB
[Setting tradeoff]
None
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ECTHRS (EC Threshold)
[Description]
The parameter ECTHRS in ESPM is valid only when RESLECTINCL is set to
“1”. If Rx+10 log10 (PS) < ECTHRS – 115, the reselection condition of the
power threshold is satisfied.
[Type]
Um interface parameter (ESPM)
[Range and unit]
0~ 31
[Operating range]
0~ 31
[Recommended value]
30
[Setting tradeoff]
If RESLECTINCL is set to “0”, this group of parameters will not be used for the
MS to perform the reselection. If the reselection function is performed, that is,
RESLECTINCLE is set to “1”, the parameter ECTHRS should be set according
to the above formula.
EC/IOTHRS (Ec/Io Threshold)
[Description]
The parameter ECIOTHRS in ESPM is valid only when RESLECTINCL is set to
“1”.
[Type]
Um interface parameter (ESPM)
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[Range and unit]
0~ 31
[Operating range]
0~ 31
[Recommended value]
30
[Setting tradeoff]
If RESLECTINCL is by default setting to “0”, this group of parameters will not
be used for the MS to perform the reselection. If the reselection function is
started, that is, RESLECTINCL is set to “1”, the parameter ECIOTHRS should
be set according to the above formula.
6.7 Neighbour List Messages (NLM) [Command name] MOD SYSMSGCTRL
In the version above R002B03, dynamic modification can be made on
AirBridge so that the system can issue GNLM. What the 450MHz system
issues is the GNLM.
PLTINC (PN Increment)
[Description]
This parameter represents the pilot PN sequence offset index increment.
The value of this parameter should be the greatest common divisor of all PN
sequences of the adjacent BTSs. For a given PILOT_INC, the number of PNs
available to the system is 512/PILOTINC.The smaller the value of this
parameter is, the more pilot PN offsets are available. As a result, the reuse
distance between pilots with the same phase will increase, and the interference
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between them will be lessened, but the phase spacing between different pilots
will decrease, so pilot confusion may be caused.
If the value of this parameter is set large, the fewer pilot PN offsets are
available. As a result, the pilots in the remaining set will decrease and the time
the MS spends scanning pilots will also be reduced accordingly. In a practical
dynamic environment, the loss probability of a strong pilot signal will drop and
the available pilot PN offsets will decrease, so the reuse distance between
pilots with the same phase will decrease and the interference between them
will be intensified. This parameter also determines the maximum size of the
search window of the neighbour set and remaining set.
[Type]
Um interface parameter (SPM).
[Range and unit]
1~15 (unit: 64PN chips)
[Operating range]
2, 4, 6 and 8
[Recommended value]
4
[Setting tradeoff]
The recommended value range is 2 ~ 6. In dense areas, this parameter can set
small, while in wide coverage areas, the parameter can be set large.
6.8 Global Service Redirecting Messages (GSRDM) [Command name] MOD GSRDM
RDRCTACCOLC (Redirected Access Overload Classes)
[Description]
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If the MS is not used for the test or emergency purpose, the access overload
class of the MS is 0~9. The access overload class of the MS is the last decimal
digit of the IMSI of the MS. For example, if the IMSI of an MS is
460030912120003, the access overload class of the MS is 3. When the IMSI of
the MS is updated, the access overload class of the MS will also be updated.
The access overload class of the MS used for the test is 10, that of the MS
used for the emergency purpose is 11 and the access overload class 12~15 are
reserved.
Table 6-5 Redirection access overload level
Sub-field bit Sub-field
description
Sub-field bit Sub-field
description
ACCOLC_0 1 Access
overload class
0
ACCOLC_
8
1 Access
overload class
8
ACCOLC_1 1 Access
overload class
1
ACCOLC_
9
1 Access
overload class
9
ACCOLC_2 1 Access
overload
class2
ACCOLC_
10
1 Access
overload class
10
ACCOLC_3 1 Access
overload
class3
ACCOLC_
11
1 Access
overload class
11
ACCOLC_4 1 Access
overload class
4
ACCOLC_
12
1 Access
overload class
12
ACCOLC_5 1 Access
overload class
5
ACCOLC_
13
1 Access
overload class
13
ACCOLC_6 1 Access
overload class
6
ACCOLC_
14
1 Access
overload class
14
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ACCOLC_7 1 Access
overload class
7
ACCOLC_
15
1 Access
overload class
15
[Type]
Um interface parameter (GSRDM).
[Range and unit]
1~15 (unit: 64PN chips)
[Operating range]
1~15
[Recommended value]
0
[Setting tradeoff]
If the MS is allowed to redirect, the corresponding bit of the access load class
of the MS should be set to “1”. Otherwise, it should be set to “0”.
RETFAIL (Return if Fault Indicator)
[Description]
This parameter represents the return fault ID. If the MS is allowed to return to
the system when it fails to select the system in accordance with the reselection
principle in the message, this parameter should be set to “1”. Otherwise, it
should be set to “0”.If the parameter is set to “1”, the MS may return to the
original carrier, resulting in the ping-pong effect.
[Type]
Um interface parameter (GSRDM)
[Range and unit]
0/1 (off/on)
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[Operating range]
0/1
[Recommended value]
0
[Setting tradeoff]
None
EXCPREVMS (Exclude Redirection Indicator)
[Description]
If it is required that the MS whose MOBPREV=6 should be free from the effect
of the GSRDM, this parameter should be set to “1”. Otherwise, it should be set
to “0”.
[Type]
Um interface parameter (GSRDM)
[Range and unit]
0/1 (off/on)
[Operating range]
0/1
[Recommended value]
0
[Setting tradeoff]
None
RECTP (Redirection Record Type)
[Description]
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Refer to Table 6-6
Table 6-6 Redirection record types
Description Record type (bin)
NDSS close indication '00000000'
Redirect to an analog system '00000001'
Redirect to the CDMA system '00000010'
Redirect to the TACS analog system '00000011'
Redirect to the JTACS analog system '00000100'
Other record types reserved
[Type]
Um interface parameter (GSRDM).
[Range and unit]
0~1 (0 – not redirect, 1 – redirect to CDMA system)
[Operating range]
0/1
[Recommended value]
1, namely, 2
[Setting tradeoff]
None
6.9 Extended CDMA Channel List Messages (CCLM) [Command name]
MOD ECCLM
RCQPCHSELINCL (RC Quick Paging Channel Selection Included)
[Description]
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This parameter indicates whether the RC and QPCH choice is included. If the
number of included RCQPCHCAPIND (RCQPCH capacity indication) is
NUM_FREQ (number of CDMA frequencies), this parameter must be set to “1”.
Otherwise, it must be set to “0”.If QPCH is used, this parameter must be set to
“1”.
[Type]
Um interface parameter (ECCLM).
[Range and unit]
0/1 (off/on)
[Operating range]
0/1
[Recommended value]
1
[Setting tradeoff]
None
RCQPCHHASHIND (RC Quick Paging Channel HASH Indicator)
[Description]
This parameter means the RCQPCH HASH indication. If the parameter
RCQPCHSELINCL is set to “1”, the BTS must contain this field. Otherwise, the
BTS must neglect the field. If the relevant CDMAFREQ is included in the HASH
list of the MS supporting RC>2 or quick paging channel, this field must be set to
“1”. Otherwise, it must be set to “0”.When the extended CDMA channel list
message is sent on the broadcast control channel and the relevant
CDMAFREQ is one of the HASH list of the MS supporting the quick paging
channel, this field must be set to “1”.
[Type]
Um interface parameter (ECCLM).
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[Range and unit]
0/1 (off/on)
[Operating range]
0/1
[Recommended value]
1
[Setting tradeoff]
None
6.10 Extended Global Service Redirection Messages (GSRDM) [Command name] MOD EGSRDM
RDRCTPREVINCL (Redirection Mobile Protocol Revision Included)
[Description]
This parameter indicates whether the protocol version of the MS which the
redirection applies to is included.
[Type]
Um interface parameter (EGSRDM).
[Range and unit]
0/1
[Operating range]
0/1
[Recommended value]
0
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[Setting tradeoff]
If the redirection designated in the EGSRDM applies to some specific protocol
versions of the MS, this field must be set to “1”. Otherwise, it must be set to ”0”.
EXCPREV (Excluding Mobile Protocol Revision Indicator)
[Description]
This parameter indicates that the protocol version of the MS which the
redirection applies to is excluded.
[Type]
Um interface parameter (EGSRDM).
[Range and unit]
0/1
[Operating range]
0/1
[Recommended value]
0
[Setting tradeoff]
If REDIRECTPREVINCL is set to “1”, the BTS must contain this field.
Otherwise, the BTS must neglect this field. If the MOB_P_REV of the MS is
between REDIRECTPMIN and REDIRECTPMAX, and the MS is excluded from
global service redirection, this field must be set to “1”. Otherwise, if the
MOBPREV of MS is within the protocol versions designated by MINRDPREV
and MAXRDPREV, and the MS is under control of redirection, this field must be
set to “0”.
MINRDPREV (Min. Redirection Protocol Version)
[Description]
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This parameter represents the lowest redirection protocol version.
[Type]
Um interface parameter (EGSRDM).
[Range and unit]
0~6
[Operating range]
0~6
[Recommended value]
0
[Setting tradeoff]
Configure the lowest protocol version by which operations (namely, redirection
is included or excluded) designated by EXCLPREVIND are allowed.
MAXRDPREV (Max. Redirection Protocol Version)
[Description]
This parameter represents the lowest redirection protocol version.
[Type]
Um interface parameter (EGSRDM).
[Range and unit]
0~6
[Operating range]
0~6
[Recommended value]
6
[Setting tradeoff]
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Configure the highest protocol version by which operations (namely, redirection
is included or excluded) designated by EXCLPREVIND are allowed.
6.11 Global Neighbor List Message (GNLM) [Command name] MOD GNLM (System Message Configuration\Modify Basic GNLM)
SRCHMD (Search Mode)
[Description]
For the search modes and their values, see table 6-9
Table 6-9 Search modes
Value (bin) Description
00 No search priority or search window
01 Search priority
10 Search window
11 Search priority or search window
[Type]
Um interface parameter (GNLM).
[Range and unit]
0~ 3
[Operating range]
0~ 3
[Recommended value]
1
[Setting tradeoff]
This parameter should be set as required.
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NBRCFGPNINCL (Neighbour Configuration and Pseudo Noise Code Offset Included)
[Description]
This parameter indicates whether the neighbour configuration and PN offset are
included.
[Type]
Um interface parameter (GNLM).
[Range and unit]
0/1
[Operating range]
0/1
[Recommended value]
1
[Setting tradeoff]
If the GNLM contains the field NBRCFGPNINCL, this field should be set to “1”.
Otherwise, the field should be set to “0”.
FRQFLDINCL (Frequency Fields Included)
[Description]
This parameter indicates whether the frequency field is included.
[Type]
Um interface parameter (GNLM).
[Range and unit]
0/1
[Operating range]
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0/1
[Recommended value]
1
[Setting tradeoff]
If the GNLM contains the frequency field, this field should be set to “1”.
Otherwise, it should be set to “0”.
USETM (Use Timing Indicator)
[Description]
This parameter indicates whether the timing information is used.
[Type]
Um interface parameter (GNLM).
[Range and unit]
0/1
[Operating range]
0/1
[Recommended value]
0
[Setting tradeoff]
If the timing information of the BTS is used by the adjacent BTSs, this field
should be set to “1”. Otherwise, it should be set to “0”.
GLOBTXDRT (Global Transmission Duration)
[Description]
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If the GLOBTMINCL is included and is set to “1”, the GLOBTXDUR will be
included and will be set in the following way; otherwise, this field should be
neglected. The BTS will set this field as the width of its’ transmit window. Within
each transmit period, the value of this field is equal to or greater than 3 (unit:
80ms).
[Type]
Um interface parameter (GNLM).
[Range and unit]
0 and 3~15 (unit: 80ms)
[Operating range]
0~6
[Recommended value]
0
[Setting tradeoff]
None
GLOBTXPRD (Global Transmission Period)
[Description]
If the GLBTMINCL is included and is set to “1”, the GLBTXPRD will be included;
otherwise, this field should be neglected. The BTS will set this field as the
period length (unit: 80ms).
[Type]
Um interface parameter (GNLM).
[Range and unit]
0~ 127 (unit: 80ms)
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[Operating range]
0~ 127
[Recommended value]
0
[Setting tradeoff]
None
SRCHOFSINCL (Search Window Offset Included)
[Description]
This parameter represents the offset of the neighbour pilot channel search
window size.
[Type]
Um interface parameter (GNLM).
[Range and unit]
0~7
[Operating range]
0~7
[Recommended value]
0
[Setting tradeoff]
None
7. BTS Cell Attribute Parameters
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7.1 Set BTS Reverse Chip Processing Parameters (SET_BTSREVCHP) The setting of reverse chip processing parameters of BTS channel processing
board is directed to the resource pool, that is to say, the parameters of all
channel processing boards in a resource pool are set the same.
CELLMD (Cell Mode)
[Description]
This parameter is used to configure the cell mode for the BTS.
[Type]
Algorithm parameter
[Range and unit]
0~1
[Operating range]
0 (common cell mode), 1 (macro cell mode)
[Recommended value]
None
[Setting tradeoff]
None
MAXRANUM (Max. Number of RACH)
[Description]
This parameter is used to set the maximum number of reverse access
channels that the BTS can search.
[Type]
Algorithm parameter
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[Range and unit]
1~ 32
[Operating range]
1~ 32
[Recommended value]
2
[Setting tradeoff]
None
MAXREARCNUM (Max. Number of R-EACH and R-CCCH)
[Description]
This parameter is used to set the maximum number of R-EACH and R-CCCH
that the BTS can search. The meaning of this parameter is the same as that of
MAXRANUM. But this parameter is used for R-EACH and R-CCCH.
[Type]
Algorithm parameter
[Range and unit]
1~ 8
[Operating range]
1~ 8
[Recommended value]
The setting of this parameter depends on the requirement. The value of this
parameter is dependent upon the search range. At present, this system does
not support REACH. This parameter can be set to “1”.
[Setting tradeoff]
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None
MINPAMSZ (Min. Preamble Frame Length of ACH)
[Description]
This parameter represents the length (PAM_SZ+1) of the access preamble
frame of the access channel.
[Type]
Algorithm parameter
[Range and unit]
0~15
[Operating range]
0~15
[Recommended value]
3
[Setting tradeoff]
The access rate of users will be affected if the parameter is set too large, so
will the access success ratio of users if it is set too small.
ENSCHWADJ (Dynamically Adjust Search Centre of Traffic Channel)
[Description]
This parameter indicates whether CSM5000 is allowed to automatically adjust
the centre of the search window.
[Type]
Algorithm parameter
[Range and unit]
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Disable and enable
[Operating range]
Disable and enable
[Recommended value]
Enable
[Setting tradeoff]
None
CFM95 (Max. Number of Fingers Configured for Each IS-95 Channel)
[Description]
This parameter represents the maximum number of fingers resource configured
for each IS-95 channel.
[Type]
Algorithm parameter
[Range and unit]
4~6
[Operating range]
4~6
[Recommended value]
6
[Setting tradeoff]
If the parameter is set too large, the number of channels with minimum fingers
will become large. If the parameter is set too small, that is, 4 fingers can be
assigned to each channel at most, the assignment may fail when more than 4
fingers are to be assigned, so the performance advantages of the combination
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of multi-path energies can not be used.CSM5000 restricts the fingers assigned
to each IS-95 channel within 6.
CFM2K (Max. Number of Fingers Configured for each IS2000 Channel)
[Description]
This parameter represents the maximum number of fingers resource configured
for each IS-2000 channel.
[Type]
Algorithm parameter
[Range and unit]
4~8
[Operating range]
4~8
[Recommended value]
8
[Setting tradeoff]
None
7.2 Set BTS Cell Parameters (SET_BTSCELLPARA)
MAXCELLR (Max Cell Radius)
[Description]
This parameter represents the maximum cell radius (unit: kilometer).The BTS
supports the normal working of MS within the range of the radius.
Geographically, this parameter refers to the longest distance that the BTS can
cover (from the BTS to the border of the coverage area).This parameter is used
to set the size of the reverse common channel search window. For example,
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maxcellr = 39, that is, cell radius = 39km. Convert kilometer (diameter) into
chips 5×64chips, that is search window size of common channel. The search
window centre is set to the middle of common search window.
[Type]
Algorithm parameter
[Range and unit]
Cell mode Value range of parameter (chips)
Maximum cell radius (km)
Common cell mode
0~1024 125
Macro cell mode 0~2048 250
[Operating range]
Cell mode Operating range of maximum cell radius (km)
Common cell mode 0~125
Macro cell mode 126~184 and 217~250
[Recommended value]
1. In the BTS3612V100R002B02, the common cell mode and macro cell mode
can be modified. In other versions, the default mode is common cell mode.
2. In the BTS3612 V100R002B02 and earlier, and V100R002B01D001, this cell
radius obtained from BTS script is bidirectional. That is, cell diameter is
recommended as 80.
3. In the BTS 3612V100R001B02D008, V100R002B01D002 and
V100R002B01D003, this parameter represents this cell radius and is
recommended as 39.
4. In the BTS3612 V100R002B02, this parameter represents cell radius and is
recommended 40 (common cell mode) and 250 (macro cell mode).
[Setting tradeoff] None
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MAXUSRSPD (Maximum User Speed) [Description] This parameter represents maximum user speed and is used to set 2000
searcher Doppler frequency deviation.
[Type] Intra-BTS parameter
[Range and unit] 0~65535
[Operating range] 0~65535
[Recommended value] 255
[Setting tradeoff]
MAXSCHPAS (Max. Search Times of R-ACH, R-EACH or R-CCCH in Search Space)
[Description]
This parameter is used to set the times that the searcher traverses the search
space of R-ACH, R-EACH or R-CCCH within the time of preamble of R-ACH,
R-EACH or R-CCCH.
[Type]
Algorithm parameter
[Range and unit]
1~4
[Operating range]
1~4
[Recommended value]
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3
[Setting tradeoff]
If the parameter is set too large, the preamble frame of R-ACH, R-EACH or
R-CCCH will unnecessarily be searched for many times. As a result, the
searchers resource available to other channels will be reduced, and
furthermore, false multi-paths may be reported. If the parameter is set too low,
it is possible that some preamble frames may be missed being detected
TCHSCHWSZ (Reverse Traffic Channel Search Window Size)
[Description]
This parameter is used to set the size of the traffic channel search window. The
value of this parameter represents the size of the traffic channel search window.
The BTS has a search window for each traffic channel. Only when the reverse
signal falls into the search window, can the BTS capture and demodulate the
signal.
[Type]
Algorithm parameter
[Range and unit]
1~16 (unit: 64PN chips)
[Operating range]
1~16
[Recommended value]
1
[Setting tradeoff]
None
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SCHSOS (Initial Offset of Reverse Common Channel Searcher)
[Description]
This parameter is used to configure the initial position of the searcher.
[Type]
Algorithm parameter
[Range and unit]
0~16376
[Operating range]
0~16376
[Recommended value]
0
[Setting tradeoff]
None
PCM (power control mode)
[Description]
This parameter determines the method to send the reverse power control
command to the MS when no finger is locked on the reverse traffic channel.
Under the control of this parameter, the BTS can send the reverse power
control command to the MS and order the MS to increase the transmit power
and how much to increase, when no finger is locked on the reverse channel,
namely, before the BTS fails to capture the MS or after the MS is unlocked.
[Type]
Algorithm parameter
[Range and unit]
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0~3. For the specific meanings, refer to Table7-3
Table 7-3 Meanings of values of the parameter
0 M0dB CSMDEF_PC_NO_GAIN. “0” means no power control is performed.
1 M25dB CSMDEF_PC_GAIN_25dB. “1” means +25dB/sec with a step of 1dB.
2 M50dB CSMDEF_PC_GAIN_50dB. “2” means +50dB/sec with a step of 1dB.
3 M100dB CSMDEF_PC_GAIN_100dB. “3” means +100dB/sec with a step of 1dB.
[Operating range]
0~3
[Recommended value]
1
[Setting tradeoff]
If the parameter is set too large, the MS will be ordered to increase the transmit
power rapidly. In this way, the BTS can quickly capture the MS. But if the total
time for recapturing the MS is long, the transmit power of the MS will quickly
exceed the target power, so the reverse link capacity will decrease. If the
parameter is set too small, it will take the MS a long time to increase the
transmit power to a level at which the MS can be recaptured. When the
parameter is set to “0” (no gain), the transmit power of the MS will remain
unchanged, and will always be lower than the level at which the MS can be
captured or recaptured.
8. Load Control Parameters
8.1 Forward Load Control Parameters (FWD_LOAD_CTRL_PARA) [Command name] MOD FLDCTRL
FWDINITTHR (Forward Initial Basic Threshold)
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[Description] This parameter represents initial value of the basic admission threshold for
the forward load control. It is expressed in the permillage of the sector power.
If forward load is less than this threshold, allow for call, soft handoff and hard
handoff access.
[Type] Algorithm parameter
[Range and unit] 0--65535, unit: 0.10%
[Operating range] 1000--1600
[Recommended value] 1300.
[Setting tradeoff] If this parameter is set large, more calls can be accessed but the system
breaks down easily.
FWDMAXTHR (Forward Max Basic Threshold) [Description] This parameter represents maximum value of the basic admission threshold
for the forward load control. It is expressed in the permillage of the sector
power.
[Type] Algorithm parameter
[Range and unit] 0--65535, unit: 0.10%
[Operating range] 1000--1600
[Recommended value] 1600.
[Setting tradeoff] If this parameter is set large, more calls can be accessed but the system
breaks down easily.
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FWDMINTHR (Forward Min Basic Threshold) [Description] This parameter represents minimum value of the basic admission threshold
for the forward load control. It is expressed in the permillage of the sector
power.
[Type] Algorithm parameter
[Range and unit] 0--65535, unit: 0.10%
[Operating range] 1000--1600
[Recommended value] 1000.
[Setting tradeoff] If this parameter is set large, more calls can be accessed but the system
breaks down easily.
FWDSTOBTHR (Forward SCH To Basic Threshold) [Description] This parameter represents SCH admission offset. It is the offset of the forward
SCH admission threshold relative to the forward basic admission threshold. It
is expressed in the permillage of the sector power.
[Type] Algorithm parameter
[Range and unit] 0--65535, unit: 0.10%
[Operating range] [Recommended value] 100.
[Setting tradeoff]
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If this parameter is set large, the threshold of SCH establishment is lower and
less SCHs are established. The more the limitation to data service
transmission, the more secure the system. Vice versa.
FWDSHOTOBTHR (Forward Soft Handoff To Basic Threshold) [Description] It is the offset of the soft handoff admission threshold relative to the forward
basic admission threshold. It is expressed in the permillage of the sector
power..
[Type] Algorithm parameter
[Range and unit] 0--65535, unit: 0.10%
[Operating range] None
[Recommended value] 300.
[Setting tradeoff] If this parameter is set large, the soft handoff admission threshold is higher
and satisfies more requirements for soft handoff to decrease call drops
caused by soft handoff limitation. Vice versa.
FWDSTARPWRTHR (Start Power Limit Threshold) [Description] This parameter represents that forward load prohibits the increase of each
carrier code channel to stabilize system when forward load is parameter value.
When the load exceeds this value, the code channel power cannot increase.
This parameter is expressed in the permillage of the sector power.
[Type] Algorithm parameter
[Range and unit] 0--65535, unit: 0.10%
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[Operating range] [Recommended value] 2000.
[Setting tradeoff] If this parameter is set large, the threshold prohibiting the increase of carrier
code channel is higher and satisfies more requirements for power increase to
decrease call drops caused by power increase limitation. However, the
system is more insecure. Vice versa.
FWDSTOPPWRTHR (Stop power Limit Threshold) [Description] This parameter indicates that forward load allows the increase of each carrier
code channel when forward load is this parameter value. At that time, neither
call access nor SCH establishment permits and such requirement as new soft
handoff power prohibits. After the load is less than this value, the power can
increase. It is expressed in the permillage of the sector power
[Type] Algorithm parameter
[Range and unit] 0--65535, unit: 0.10%
[Operating range] [Recommended value] 1700.
[Setting tradeoff] If this parameter is set large, the threshold allowing for increase of carrier
code channel is higher and satisfies more requirements for power increase to
decrease call drops caused by power increase limitation. However, the
system is more insecure. Vice versa.
FWDTHRUPSTEP (Ec/Ior Threshold Up Step) [Description]
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This parameter represents up Ec/Ior step of corresponding forward load
threshold. It is power up step during the adjustment of the admission threshold.
It is expressed in the permillage of the Ec/Ior.
[Type] Algorithm parameter
[Range and unit] 0--255, unit: 0.10%
[Operating range] [Recommended value] 10.
[Setting tradeoff] FWDTHRDOWNSTEP (Ec/Ior Threshold Down Step) [Description] This parameter represents corresponding forward load threshold down step
during the control for Ec/Ior. It is the power down step during the adjustment of
the admission threshold. It is expressed in the permillage of the Ec/Ior.
[Type] Algorithm parameter
[Range and unit] 0--255, unit: 0.10%
[Operating range] [Recommended value] 10.
[Setting tradeoff] FWDFERTHR (Forward Bad FER Threshold) [Description] This parameter represents whether this branch is worse based on the FER.
Calculate forward FER proportion based on the times that each branch call
exceeds parameter value within 10seconds. When the forward FER of the call
exceeds this threshold, the FER of the call is regarded as poor.
[Type]
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Algorithm parameter
[Range and unit] 0—255 (Unit: %)
[Operating range] [Recommended value] 5.
[Setting tradeoff] This value is generally set to more than 5.
FWDFERPROP (Forward Bad FER Proportion) [Description] When the percentage of poor FERs over a carrier exceeds this threshold, the
threshold will be adjusted. Judge forward FER proportion and compare it with
this value and determine whether to start the adjustment of forward load
threshold, that is, whether to increase “Ec/Ior Threshold Up Step” or decrease
“Ec/Ior Threshold Down Step”.
[Type] Algorithm parameter
[Range and unit] 0--255, (unit: %)
[Operating range] [Recommended value] 20.
[Setting tradeoff] FWDTHRADJMINNUM (Forward Threshold Adjust Min FCH Number) [Description] This parameter represents the minimum number of branches when actual
forward bad FER proportion should be calculated. When the number of
branches on a carrier exceeds this threshold, the threshold adjustment will be
started by” Forward Bad FER Threshold”,and“Forward Bad FER
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Proportion” ,the system performs dynamic adjustment to basic admission
threshold, SCH establishment threshold and soft handoff admission threshold.
[Type] Algorithm parameter
[Range and unit] 0--255,
[Operating range] [Recommended value] 10.
[Setting tradeoff]
EPACAVAL (Forward EPACA Valve) [Description] This parameter is used for Enhanced PACA (EPACA) function. It is the
admission threshold for the use of EPACA. It is expressed in the permillage of
sector gain. When BSC receives origination request or paging response from
MS, invoke internal parameters and query system resources. If forward load is
higher than this threshold, return the cause of “no available resource” and
then BSC notifies the MSC of the cause. MSC determines whether to release
the call for this user with priority.
[Type] Algorithm parameter
[Range and unit] 0--65535, (unit: 0.1%)
[Operating range] 0--2000
[Recommended value] 2000.
[Setting tradeoff] The load is fluctuant. If this value is set high, MSC does not release the call
and the user with priority may fail to allocate resource. If this value is set small,
the call releases, which affects traffic measurement index.
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8.2 Reverse Load Control Parameters (REV_LOAD_CTRL_PARA) [Command name] MOD RLDCTRL
RSSIMIN (Min. Rssi Noise) [Description] This parameter represents minimum value of the RSSI set at theory.
[Type] Algorithm parameter
[Range and unit] 0--600, (Unit: 0.1dBm)
[Operating range] [Recommended value] 0, namely, -120dBm
[Setting tradeoff] RSSIINIT ( Init Rssi Noise) [Description] This parameter represents initial RSSI noise.
[Type] Algorithm parameter
[Range and unit] 0—600 (unit: 0.1dBm)
[Operating range] [Recommended value] 0, namely, -120dBm
[Setting tradeoff]
LOWUSERNUM (Low User Number) [Description] This parameter represents equivalent users with lower reverse load.
Equivalent users are less than the parameter value, indicating that reverse
load is very low.
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[Type] Algorithm parameter
[Range and unit] 0--255
[Operating range] [Recommended value] 20,
[Setting tradeoff] HIGHUSERNUM (High User Number) [Description] This parameter represents equivalent users with reverse high load. Equivalent
users are more than this parameter value, indicating that reverse load is very
high.
[Type] Algorithm parameter
[Range and unit] 0—255
[Operating range] [Recommended value] 60,
[Setting tradeoff]
LOWMINTHR( Low Min. Threshold) [Description] This parameter represents a minimum threshold of RSSI rise when reverse
equivalent users are less than that of low load. In this case, normal access
admits. When the current load is within the low load range, the RSSI rise is
admitted when it is smaller than the current load.
[Type] Algorithm parameter
[Range and unit] 0—600 (unit: 0.1dBm)
[Operating range]
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[Recommended value] 599,
[Setting tradeoff]
LOWMAXTHR (Low Max. Threshold) [Description] This parameter represents a maximum threshold of RSSI rise when reverse
equivalent user is in low load range. When the current load is within the low
load range, the RSSI rise is not admitted when it is larger than the current
load.
[Type] Algorithm parameter
[Range and unit] 0—600 (Unit: 0.1dBm)
[Operating range] [Recommended value] 600,
[Setting tradeoff] MIDMINTHR (Mid Min. Threshold) [Description] This parameter represents a minimum threshold of RSSI rise when reverse
equivalent user is in middle load range. When the current load is within the
middle load range, the RSSI rise is admitted when it is smaller than the
current load.
[Type] Algorithm parameter
[Range and unit] 0—600 (Unit: 0.1dBm)
[Operating range] [Recommended value] 599,
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[Setting tradeoff] MIDMAXTHR (Mid Max. Threshold) [Description] This parameter represents a maximum threshold of RSSI rise when reverse
equivalent user is in middle load range. When the current load is within the
middle load range, the RSSI rise is not admitted when it is larger than the
current load.
[Type] Algorithm parameter
[Range and unit] 0--600, unit: 0.1dBm.
[Operating range] [Recommended value] 600,
[Setting tradeoff]
HIGHMINTHR (High Min. Threshold) [Description] This parameter represents a minimum threshold of RSSI rise when reverse
equivalent user is in high load range. When the current load is within the high
load range, the RSSI is admitted when it is smaller than the current load.
[Type] Algorithm parameter
[Range and unit] 0—600 (Unit: 0.1dBm)
[Operating range] [Recommended value] 150,
[Setting tradeoff] HIGHMAXTHR (High Max. Threshold)
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[Description] This parameter represents a maximum threshold of RSSI rise when reverse
equivalent user is in high load range. When the current load is within the high
load range, the RSSI is not admitted when it is larger than the current load.
[Type] Algorithm parameter
[Range and unit] 0—600 (unit: 0.1dBm)
[Operating range] [Recommended value] 200,
[Setting tradeoff] REVFERTHR (Reverse Bad FER Threshold) [Description] When the reverse FER of the call exceeds this threshold, the FER of the call
is regarded as poor.
[Type] Algorithm parameter
[Range and unit] 0—100%
[Operating range] [Recommended value] 5.
[Setting tradeoff] This value is more than 5
REVFERPROP (Reverse Bad FER Proportion) [Description] This parameter represents the value to start reverse admission adjustment in
which reverse FER proportion. When the reverse bad FER proportion calling
from the carrier exceeds the threshold and the load is within the RSSI middle
range, the call admission is restricted.
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[Type] Algorithm parameter
[Range and unit] 0—100%
[Operating range] [Recommended value] 20.
[Setting tradeoff] FERMINNUM (FER Stat Min. FCH Number) [Description] This parameter represents the minimum number of branches when reverse
admission is adjusted dynamically based on “Reverse Bad FER Threshold”
and “Reverse Bad FER Proportion” and actual reverse FER proportion
should be calculated. Only when the call branch number in the carrier
exceeds the threshold, can the algorithm of bad FER proportion be performed
and the call admission of the RSSI middle range is restricted.
[Type] Algorithm parameter
[Range and unit] 0 - 255
[Operating range] [Recommended value] 10.
[Setting tradeoff] REV1XSCHTHROFFSET (1X SCH Threshold Offset) REV2XSCHTHROFFSET (2X SCH Threshold Offset) REV4XSCHTHROFFSET (4X SCH Threshold Offset) REV8XSCHTHROFFSET (8X SCH Threshold Offset) REV16XSCHTHROFFSET (16X SCH Threshold Offset) REV32XSCHTHROFFSET (32X SCH Threshold Offset) [Description]
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Reverse data service SCH affects reverse load, so a new threshold is added
to allocation/release of data service, that is, add the offset to original RSSI
threshold and set different offsets for SCH of different rates (“y” represents
offset of SCH with different rates).
[Type] Algorithm parameter
[Range and unit] 0—255 (Unit: 0.1dBm)
[Operating range] [Recommended value] The following table shows the details:
Rate SCH admission threshold offset (y)
1x 1 2x 2 4x 4 8x 8
16x 16 32x 32
[Setting tradeoff] None
8.3 Access Load Control Parameters (ACH_LOAD_CTRL_PARA) [Command name] MOD ALDCTRL
ACHHIGHTHR (Access Channel High Threshold) [Description] If access channel load exceeds this threshold, the MS access speed will be
slowed down.
[Type] Algorithm parameter
[Range and unit] 1—99 (unit: %)
[Operating range]
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[Recommended value] 80.
[Setting tradeoff] ACHLOWTHR (Access Channel Low Threshold) [Description] If the access channel load is less than this threshold, the MS access speed
will be sped up.
[Type] Algorithm parameter
[Range and unit] 1 - 99 (Unit: %)
[Operating range] [Recommended value] 60.
[Setting tradeoff] ACHUPSTEP (Psist Up Step) [Description] It is the step used for the slowdown of the MS access speed.
[Type] Algorithm parameter
[Range and unit] 0--63,
[Operating range] [Recommended value] 1.
[Setting tradeoff] ACHDOWNSTEP (Psist Down Step) [Description] It is the step used for the speedup of the MS access speed.
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[Type] Algorithm parameter
[Range and unit] 0--63,
[Operating range] [Recommended value] 1.
[Setting tradeoff] ACHMAXVAL (Psist Max. Value) [Description] Upper limit of access load adjustment.
[Type] Algorithm parameter
[Range and unit] 0--63,
[Operating range] 0--15
[Recommended value] 12.
[Setting tradeoff] Under high access load, to avoid long access time caused by long persistent
detection of MS, restrict the adjustment of upper threshold.
ACHADJDELAY (Psist Adjust Delay) [Description] Delay needed after adjusting the access channel load each time. This
parameter represents report period times of delay.
[Type] Algorithm parameter
[Range and unit] 0--255, with the unit of times
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[Operating range] [Recommended value] 3.
[Setting tradeoff]
8.4 Service Resource Management Parameters (BSCRSM) [Command name] MOD BSCRSM
FWDLDCTRLSW (Forward Load Control Algorithm Selection) [Description] Forward load control switch. It indicates the mode of forward load control.
[Type] Algorithm parameter
[Range and unit] 0 and 1,
0---R02 version, 1---R03 version
[Operating range] [Recommended value] 0.
[Setting tradeoff] FWDTHRADJSW (Forward Threshold Adjust Switch) [Description] Whether to allow the forward load threshold to perform dynamic adjustment
[Type] Algorithm parameter
[Range and unit] 0 and 1,0---Off,1---On.
[Operating range] [Recommended value] 0.
[Setting tradeoff]
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FWDSCHPWRESTSW (Forward SCH Power Estimate Switch) [Description] Whether to enable the forward SCH power estimate switch.
[Type] Algorithm parameter
[Range and unit] 0 and 1,0---Off, R02 version, that is, BSC fixed configuration. 1---On
[Operating range] [Recommended value] 1.
[Setting tradeoff] REVLDCTRLSW (Reverse Load Control Algorithm Selection) [Description] It indicates the mode of reverse load control
[Type] Algorithm parameter
[Range and unit] 0 and 1,0---R02 version 1---R03 version
[Operating range] 0 and 1
[Recommended value] 0.
[Setting tradeoff] RSSINOISALGSW (RSSI Noise Estimating Algorithm Selection) [Description] It indicates the mode of RSSI back noise estimation.
[Type] Algorithm parameter
[Range and unit]
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0 and 1,0---Solution one, 1---Solution two
[Operating range] 0 and 1
[Recommended value] 1.
[Setting tradeoff] ACHLDCTRLSW (Access Channel Load Ctrl Switch) [Description] Whether to enable the access load control switch.
[Type] Algorithm parameter
[Range and unit] 0 and 1,0—Off,1---On.
[Operating range] 0 and 1
[Recommended value] 0.
[Setting tradeoff]
9. TCP Optimization Parameters
[Command name] MOD MAPARA
MASWITCH [Description] This parameter represents whether to enable TCP optimization function, that
is Mobile Agent (MA) Function.
[Type] Algorithm parameter
[Range and unit]
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0 and 1, 0--ON,1---Off
[Operating range] 0 and 1
[Recommended value] 0.
[Setting tradeoff] None
MAIPCOMPRESS [Description] This parameter represents whether to allow IP header compression-TCP/IP
Van Jacobson Compression
[Type] Algorithm parameter
[Range and unit] 0 and 1, 0---Prohibited, 1--Allowed
[Operating range] 0 and 1
[Recommended value] 0.
[Setting tradeoff] MACCP [Description] This parameter represents whether to allow Compression Control Protocol
(CCP) negotiation.
[Type] Algorithm parameter
[Range and unit] 0 and 1, 0---Prohibited, 1--Allowed
[Operating range] 0 and 1
[Recommended value]
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0.
[Setting tradeoff] None
MAECP [Description] This parameter represents whether to allow Encryption Control Protocol (ECP)
negotiation.
[Type] Algorithm parameter
[Range and unit] 0 and 1, 0---Prohibited, 1--Allowed
[Operating range] 0 and 1
[Recommended value] 0.
[Setting tradeoff] None
MTUMODIFY This parameter represents whether to allow to modify Maximum Transmission
Unit (MTU) option.
[Type] Algorithm parameter
[Range and unit] 0 and 1, 0---Prohibited, 1--Allowed
[Operating range] 0 and 1
[Recommended value] 0.
[Setting tradeoff]
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MTUVALUE [Description] This parameter represents the size of Maximum Transmission Unit (MTU),
eliminating overhead of TCP/IP header, that is Maximum Segment Size
(MSS).
[Type] Algorithm parameter
[Range and unit] 472--1460, with the unit of byte
[Operating range] [Recommended value] 1460.
[Setting tradeoff]