Basic 2G Parameter Training

7/24/2019 Basic 2G Parameter Training

1/18

2 P r m t r Tr inin

Page 116-Jan-10 2010 Tigo Rwanda Rollout


2/18

COMMON PARAMETER

CELL DATA

BSPWRBRange : 0-63dBm

Definition: Base Station output power in dBm for the BCCH RF channel number. The BTS can transmit with

.

power is specified at the Power Amplifier (PA) output, that is immediately after the transmitter unit and before the

combiner.

Recommended Value: GSM900 : 47 dBm, odd values only

GSM1800: 45 dBm odd values only

CGI MCC-MNC-LAC-CI

Range: MCC: 3 digits (Mobile Country Code).

MNC: 2 or 3 digits (Mobile Network Code).

LAC: 1 to 65535 (Location Area Code)

CI: 0 to 65535 (Cell Identity).

Definition: CGI (Cell Global Identity) is the global identity of the cell in the whole system. CGI is sent to the mobile

station (MS) as a part of the system information message (GSM Rec. 04.08). The combination MCC-MNC-LAC is

also known as the location area identity (LAI).

BSIC - NCC-BCC

Range: NCC: 0 to 7 (Network Colour Code).

BCC: 0 to 7 (Base station Colour Code)Definition: BSIC is defined on a per cell basis and it is sent on the logical synchronisation channel (SCH) on the

.

on the BCCH frequency. The colour code NCC is then used to discriminate cells that use the same frequency.

Though mainly intended for the purpose of differentiating PLMNs, it also serves to distinguish cells within

one PLMN that use the same frequency provided they have been assigned different NCC. If there are two

operators in a country, they can use more than two PLMN colour codes each one, provided that in border areas


only the values "n" and "n+4" are used. The measured signal levels on the serving cell.

The measured levels, the BSIC and the BCCH frequency of the neighboring cells.


3/18

COMMON PARAMETER

BCCHNO

Range: 1 to 124 (GSM 900).

0, 975 to 1023 (GSM 900, G1)512 to 885 (GSM 1800).

512 to 810 (GSM 1900).

Definition: The fre uenc carr in the BCCH Broadcast Control Channel in a cell is defined b the Absolute

Radio Frequency Channel Number, ARFCN, with the parameter BCCHNO. The defined ARFCN must be unique

within the cell.

BCCHTYPE

Range: COMB, COMBC, NCOMB. .

COMB indicates that the cell has a combined BCCH and SDCCH/4 (see section 0).

COMBC indicates that the cell has a combined BCCH and SDCCH/4 with a CBCH subchannel.

NCOMB indicates that the cell does not have any type of combined BCCH and SDCCH/4.

**The BCCH is always allocated to time slot number 0 (TN0) in the defined ARFCN.

AGBLK

Range: 0 to 7 if non-combined BCCH is used.

0 to 2 if combined BCCH and SDCCH/4 is used.

Definition: Number of reserved access grant blocks. Number of CCCH blocks reserved for the access grant

channel. The remainin CCCH blocks are used for the a in channel.

Recommended value: 1

MFRMS

Range 2 to 9.

Definition: Multiframes period. Defines period of transmission for PAGING REQUEST messages to the same

.

Recommended value: 3 or 4

ECSC

Range: NO, YES.

Definition: Early Classmark Sending Control. Indicates if an MS in the cell is allowed to use early classmark


sending.Note: The parameter ECSC has to be set to YES in order to allow the MS to send the MS multiband and/or

multislot capability. No multiband or multislot configuration will be established unless the MS capability is known.


4/18

COMMON PARAMETER

TSC

Range: 0 to 7

Definition: Training Sequence Code.The Training Sequence Code can only be changed for cells with a subcell structure.

MSTXPWR

Ran e: 13 to 43 GSM 900 odd values onl .

4 to 30 (GSM 1800) even values only.

4 to 30 (GSM 1900) even values only.

Definition: Maximum transmit power for MS on connection.

BSPWRT

Comments: Base Station output power in dBm for the non-BCCH RF channel numbers.

GSM 900: 31 to 47 dBm, odd values only

GSM 1800: 33 to 45 dBm, odd values only



5/18

COMMON PARAMETER

Channel Group Data

CHGRRange: 0 to 15.

Definition: Channel group number.

A cell is divided into one or more channel rou s which contain all h sical channels on an arbitrar

number of frequencies. Cells with a subcell structure must have at least one channel group defined in each

subcell.

HOP

Range: ON, OFF .

ON The hopping status for the channel group is hopping for TCH and SDCCH.

OFF The hopping status for the channel group is non hopping.

HSN

Range: 0 to 63

Definition: Hopping sequence number.

The hopping BPC is transmitted on a set of frequencies included in a Hopping Frequency Set (HFS). Theorder of the frequencies to transmit on is defined by the hopping sequence number HSN, as described in GSM

05.02.

HSN = 0 c clic ho in se uence.

HSN = 1 to 63 pseudo random sequences.

NUMREQBPC

Range: 8 to 128 in steps of 8, SYSDEF.

Definition: The number of required basic physical channels (BPCs) in a channel group.

. .

NUMREQBPC_CHGR1

222 333 444

CELL A 8 16 24

CELL B 8 16 24



6/18

COMMON PARAMETER

DCHNO

Range: 1 to 124 (GSM 900).

0, 975 to 1023 (GSM 900 G1)512 to 885 (GSM 1800).

512 to 810 (GSM 1900).

. .

SDCCH

Range: 0 to 16

Definition: Comments: Required number of SDCCH/8.



7/18

COMMON PARAMETER

Neighboring Relation Data

CELLRRange: 1 to 7 characters except ALL.

Definition: Related cell designation.

The identit of the nei hbourin cell for which the set of arameters should be a lied is s ecified b

means of CELLR. The name of the neighbouring cell must be specified here.

CTYPE

Range: EXT, Omitted.

Definition: If the neighbouring cell belongs to another BSC then this must be specified explicitly by means of.

.

RELATION

Range: SINGLE, MUTUAL

Definition: The parameter is only specified when the relation is one way cell to cellr. This means that offset and

hysteresis parameters are only defined in one/both direction

CSRange: YES, NO.

Definition : Co-site, which indicates if a cell shares the same site as its neighbour.



8/18

COMMON PARAMETER

Implicit detach MSC data

BTDMRange: 6 to 1530 in steps of 6, OFF..

Definition: Base time duration of implicit detach of a mobile subscriber by the network.

BTDM must be as lon as the lon est eriodic u datin time T3212 in the interworkin BSCs.

The supervision time is the sum of BTDM and GTDM.

.

GTDM

Range: 0 to 255. .

implicit detached.

T3212

Range: 0 to 255.

Definition : T3212 time-out value. Defines the time-out value that controls the location updating procedure, i.e.

when notifying the availability of the MS to the network.



9/18

COMMON PARAMETER

Idle mode behaviour cell data

ACCMINRange: 47 to 110.

Definition: Minimum received signal level in dBm at the MS for permission to access the system.

.

CCHPWR

Range: 13 to 43 in steps of 2 (GSM 900).

4 to 30 in steps of 2 (GSM 1800).

4 to 30 in steps of 2 (GSM 1900). .

CRH

Range: 0 to 14 in steps of 2.

Definition : Cell Reselection Hysteresis. Receiving signal strength (rxlev) hysteresis for required cell re-selection

over location area border.

NCCPERM

Range: 0 to 7.

Definition: PLMN NCC Permitted. Defines the allowed NCCs Network Colour Code on the BCCH carriers for

which the MS is permitted to send measurement reports.

CB

Range: YES, NO.

.

NO The cell is not barred for access.

YES The cell is barred for access.



10/18

COMMON PARAMETER

Idle mode behaviour cell data

CBQRange: HIGH, LOW.

Definition: Cell Bar Qualify.

HIGH: The cell has hi h riorit

LOW: The cell has low priority

.

MAXRET , , , .

Definition: Maximum retransmissions. Defines maximum number of retransmissions an MS may do when

accessing the system on RACH.

ATT

Range: YES, NO.Definition : ATT tells the MS if it is allowed to apply IMSI attach and detach, i.e. if the MS is allowed to send a

message to the system every time it is turned on or off

.

CRO

Range: 0 to 63.

Definition: Cell Reselection Offset. Defines an offset to encourage or discourage MSs to select the

cell while it is camping on another cell, i.e. perform a cell reselection.



11/18

COMMON PARAMETER

Basic Ranking

BSPWRRange: 0 to 80. dBm

Definition: BSPWR is the BTS output power on the BCCH frequency. BSPWR is defined at the reference point

used in the locatin al orithm.

Recommended Value: 47 GSM 900; 45 GSM1800

MSRXMIN

Range: 0 to 150. dBm

a possible candidate for handover.

Recommended Value: 100

BSRXMIN

Range: 0 to 150. dBm

Definition : Minimum required signal strength received at the BTS, at the reference point, to consider the cell as apossible candidate for handover.

.

BSTXPWR

Range: 0 to 80 dBm

Definition: BSTXPWR is the BTS output power on all frequencies other than the BCCH frequency. BSTXPWR

indicates base station output power for the transmitter operating on a pure TCH frequency, at a common

.

Corrected signal strength of neighboring cells.

SS_DOWNn = rxlevn + BSTXPWRn - BSPWR n



12/18

COMMON PARAMETER

Urgency conditions cell data

TALIMRange: 0 to 63 (normal range cell).

Definition: Timing advance limit for handover. Urgency detection parameter.


Disconnection algorithm cell data

MAXTA

Range: 0 to 63 (normal cell). .


** MAXTA should always be greater than the parameter TALIM

RLINKUPRange: 1 to 63.

Definition : Radio link time-out. The maximum value of the radio link counter for the uplink. RLINKUP is used by

the BSC to determine when to disconnect the call u on re eated failure in decodin the SACCH.

.

RLINKT

Range: 8 to 64 in steps of 4.

Definition: Radio Link time-out. The maximum value of the radio downlink counter. RLINKT is used by the MS to

.



13/18

COMMON PARAMETER

Channel administration/Immediate assignment on TCH

CHALLOCRange: 0 to 2.

Definition: CHALLOC is used in the channel allocation algorithm to determine if a non-hopping TCH on the

BCCH fre uenc should be allocated with first last or with no reference.

0 No preference.

1 First preference.

2 Last preference.

Range: 0 to 7.

Definition: Channel Allocation Profile

The following eight channel allocation profile are available:

CHAP = 0 Default

CHAP = 1 Immediate assignment on TCH, SDCCH chosen first.

CHAP = 2 Immediate assignment on TCH, TCH chosen first, GSM Phase 2 MSs, Channel Needed provided bythe MSC.

CHAP = 3 Immediate assignment on TCH, TCH chosen first, GSM Phase 2 MSs,Channel Needed not provided

b the MSC.

CHAP = 4 Immediate assignment on TCH, TCH chosen first, GSM Phase 1 MSs, Channel Needed not provided

by the MSC.

CHAP = 5 Overlaid subcell as last resort.

CHAP = 6 Immediate assignment on TCH, SDCCH chosen first, Overlaid subcell as last resort.

.

NECI

Range: 0 and 1.

Definition : New establishments cause indicator. NECI is used to indicate to a GSM phase 2 MS whether to


use GSM phase 1 establishment (NECI = 0) causes or the full set of GSM phase 2 establishment causes(NECI = 1).


14/18

COMMON PARAMETER

GPRS Channel administration

GPRSRange: ON, OFF.

Definition: Activates/deactivates GPRS support in the cell.

FPDCH

Range: 0 to 8.

Definition: FPDCH is used to dedicate a number of traffic channels in the cell for GPRS only. The dedicated

PDCH can not be pre-empted by circuit switched traffic.

Dynamic MS Power Control

DMPSTATE

Range: ACTIVE/INACTIVE.

Definition: Dynamic MS power control state.

Dynamic BTS power control DBPSTATE

Range: ACTIVE/INACTIVE.

Definition: D namic BTS ower control state.

SSDESDL

Range: 47 to 110.

Definition: Defines the target value for the desired signal strength downlink as measured by the MS in different

.

QDESDL

Range: 0 to 70.

Definition: Desired quality, downlink.



15/18

COMMON PARAMETER

MAIO Management

MAIORange: 0 to 15 or DEFAULT.

Definition: Mobile Allocation Index Offset. MAIO is a parameter that wi ll allow the operator to specify a lis t

of u to 16 MAIO values in the order in which the are to be allocated to a channel rou . This arameter can

also be set to DEFAULT, which removes the manual MAIO list in favor for the default MAIO list.

MAIO

Configuration

GSM900

222 333 444

CELLA 0 02 024

CELL

B 6 6

8 6

8

10

MAIOConfigurationGSM1800

222 333 444

CELLA DEFAULT DEFAULT DEFAULT

CELLB DEFAULT DEFAULT DEFAULT

CELLC DEFAULT DEFAULT DEFAULT

Intra cell handover

IHORange: ON, OFF.

Definition: Intra cell handover switch. Intra cell handover is a channel change between two channels

within the same subcell and if certain conditions are fulfilled a

subcell change within a cell.

ON Intra cell handover is allowed.

OFF Intra cell handover is not allowed.\

Range: 0 to 15.

Definition: Maximum number of consecutive intra-cell handovers.



16/18

COMMON PARAMETER

Hierarchical cell st ructures

LAYERRange: 1 to 8.

Definition: Cell layer, i.e. the priority of the cell. Layer 1 has the highest priority. It is recommended that the layers

are defined in increasin order connected to the size of the area the cells cover.

LAYERTHR

Ran e: 0 to 150.dBm

Definition: The signal strength threshold is used for ranking of cells in different layers within each HCSBAND.

LAYERHYST

Range: 0 to 63. .

HCSBAND.



17/18

COMMON PARAMETER

Idle channel measurements

ICMSTATERange: ACTIVE, PASSIVE, NOALLOC.

Definition: Idle Channel Measurement State.

LIMITn

Range: LIMIT1: 0 to 59.

LIMIT2: 1 to 60. .

LIMIT4: 3 to 62.

Definition: This parameter defines threshold limits for five different interference bands. The limits must be defined

in ascending order according to the following: LIMIT1 < LIMIT2 < LIMIT3 < LIMIT4.



18/18

Thank you!

Page 1816-Jan-10 2010 Tigo Rwanda Rollout Page 18

Basic 2G Parameter Training

Documents

Transcript of Basic 2G Parameter Training