Congestion Mitigation Strategies: Modifications to the City’s plan New York City Traffic Congestion…
Congestion or Low Throughput Mitigation Strategy
description
Transcript of Congestion or Low Throughput Mitigation Strategy
Huawei Confidential
Title : Dynamic CE & CE Overbooking Trial
Object : RNC Menara Mulia 2
By : Strategic Optimization Team
Optimization Strategy
How to Solve Different Type of Congestion/Low Throughput in Cell LevelStrategic Optimization Team
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Congestion/Low Throughput Mitigation Strategy
3G Huawei•CE Blocking/CE High Utilization
•Iub Blocking/Iub High Utilization
•DL- Power Blocking/DL - Power High Utilization
•UL- Power Blocking
•Code Blocking•FACH Congestion•HSPA Throughput Optimization
3G Nokia•CE Blocking/CE High Utilization
•Iub Blocking/Iub High Utilization
•DL- Power Blocking/DL - Power High Utilization
•UL- Power Blocking
•Code Blocking
2G Huawei•CS Blocking & Non PS blocking
•PS Blocking & Non CS blocking
•CS Blocking & PS blocking
•2G/3G reselection ( traffic share)
2G Nokia•CS Blocking & Non PS blocking
•PS Blocking & Non CS blocking
2G Siemens•CS Blocking & Non PS blocking
•PS Blocking & Non CS blocking
•CS Blocking & PS blocking
•2G/3G reselection ( traffic share)
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3G HuaweiPerformance Counter for Congestion
Vendor Tech Resource Type Congestion CounterHuawei 3G UL CE VS.RRC.Rej.ULCE.Cong+VS.RAB.FailEstabCS.ULCE.Cong+VS.RAB.FailEstabPS.ULCE.CongHuawei 3G DL CE VS.RRC.Rej.DLCE.Cong+VS.RAB.FailEstabCS.DLCE.Cong+VS.RAB.FailEstabPS.DLCE.CongHuawei 3G UL Power VS.RRC.Rej.ULPower.Cong+VS.RAB.FailEstabCS.ULPower.Cong+VS.RAB.FailEstabPS.ULPower.CongHuawei 3G DL Power VS.RRC.Rej.DLPower.Cong+VS.RAB.FailEstabCS.DLPower.Cong+VS.RAB.FailEstabPS.DLPower.CongHuawei 3G UL IuB VS.RRC.Rej.ULIUBBand.Cong+VS.RAB.FailEstabCS.ULIUBBand.Cong+VS.RAB.FailEstabPS.ULIUBBand.CongHuawei 3G DL IuB VS.RRC.Rej.DLIUBBand.Cong+VS.RAB.FailEstabCS.DLIUBBand.Cong+VS.RAB.FailEstabPS.DLIUBBand.CongHuawei 3G Code VS.RRC.Rej.Code.Cong+VS.RAB.FailEstabCS.Code.Cong+VS.RAB.FailEstabPS.Code.Cong
Case 1st Action 2nd Action 3rd Action 4th Action
CE Blocking/CE High UtilVerify CE license and CE board capability. Commands involved : DSP LICENSE, DSP BBPTC
Physical Audit (involving TP analysis)
CE license and/or board upgrade
Modify LDR threshold. Sets involved : UCELLLDM, UCELLLDR
Iub Blocking/Iub High UtilVerify Iub BW setting in Node-B and in RNC. Sets involved : IPPATH, IPLOGICPORT
Physical Audit (involving TP analysis) Iub BW upgrade
Modify FTI to reduce Active Factor. Sets involved : TRMFACTOR, ADJMAP, ADJNODE
DL- Power Blocking/DL - Power High Util
Physical Audit (involving TP analysis)
Activate 40W, maintain existing PCPICH setting
Modify DL CAC parameters set to higher value. Parameters involved : DLCONVAMRTHD, DLCONVNONAMRTHD, DLOTHERTHD, DLHOTHD, DLCELLTOTALTHD
UL- Power Blocking Physical Audit (involving TP analysis)
Increase ULTOTALEQUSERNUM (e.g from 160 to 180)
Turn-off NBMULCACALGOSELSWITCH (set to ALGORITHM_OFF)
Code Blocking Physical Audit (involving TP analysis)
Modify DLHOCECODERESVSF to lower SF (e.g from SF32 to SF 64)
Reduce HSPDSCHMINCODENUM (e.g from 5 to 4)
Reduce HSSCCHCODENUM (e.g from 4 to 3)
Step of Action
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3G Huawei-CE, SPU & CodeDetails of Parameter
Equipment Tech Parameter Name Category Purpose Applicable
Condition Cons Severity Command Sample (Optional)
Huawei 3G MAPSWITCH_MAP_HSUPA_TTI_2MS_SWITCH
CE Blocking
Disable 2ms TTI for HSUPA service
When Cell having Low accessibility due
UL Power Congestion >0.5%
HSUPA Throughput will degraded with
only 10 ms TTIR4
SET UCORRMALGOSWITCH:MAPSWITCH=MAP_HSUPA_TTI_2MS_SW
ITCH-0;
Huawei 3G N300 SPU Load
reduce Maximum number of retransmissions of the
RRC CONNECTION REQUEST message.E.g
from 3 to 1
High SPU Load due traffic increase >70%
lower value UE experiences difficulty
accessing the network when the
Uu interface quality is poor or the system
is overloaded
R4 SET UIDLEMODETIMER:N300=1;
Huawei 3G PsInactTmrForPreFstDrm SPU Load increase CELL-PCH
inactivity timer for UEs enabled with the Fast
Dormancy feature
High SPU Load due traffic increase >70%
PS Total Traffic will decrease & RRC SR
will statistically degrade due less
attempt
R3 SET UPSINACTTIMER:PSINACTTMRFORPREFSTDRM=900,
Huawei 3G HSPDSCHCODENUM Code Blocking
Reduce HSPDSCHMINCODENUM
(e.g from 5 to 4)
When Cell having Low accessibility due Code Blocking >0.5%
HSDPA Throughput will degraded with lower PDSCH Code
R4MOD
UCELLHSDPA:CELLID=XXXXX,ALLOCCODEMODE=Manual,HSPDSCHCODENUM=5;
Huawei 3G DLHOCECODERESVSF Code Blocking
Modify DLHOCECODERESVSF to
lower SF (e.g from SF32 to SF 64)
When Cell having Low accessibility due Code Blocking >0.5%
degrading bitrate might occur while
HO or RRCR4 MOD UCELLCAC:CELLID=31890,DLHOCECODERESVSF=SF64;
Huawei 3G ULHOCERESVSF& ULRRCCERESVSF
Code Blocking
Set lower SF on ULHOCERESVSF&
ULRRCCERESVSF e.g SF16->SF32
When Cell having Low accessibility due RRC.Rej.ULCE.Cong
degrading bitrate might occur while
HO or RRCR4 ADD UCELLCAC:CELLID=31890,ULHOCERESVSF=SF32;
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3G Huawei-FACHDetails of Parameter
Equipment Tech Parameter Name Category Purpose Applicable
Condition Cons Severity Command Sample (Optional)
Huawei 3G SLOTFORMATFACH
Congestion
Change FACH SlotFormat to expand FACH Bandwidth
using Higher format ex : from D8 to D10
When Cell having High FACH Congestion
R3
DEA UCELL: CELLID=30706;DEA USCCPCH: CELLID=30706, PHYCHID=9;
RMV UFACHLOCH: CELLID=30706, TRCHID=4;RMV UFACHDYNTFS: CELLID=30706, TRCHID=4, RLCSIZE=168;RMV UFACHDYNTFS: CELLID=30706, TRCHID=5, RLCSIZE=360;
RMV UFACH: CELLID=30706, TRCHID=4;RMV UFACH: CELLID=30706, TRCHID=5;
RMV USCCPCH: CELLID=30706, PHYCHID=9;
ADD USCCPCHBASIC: CELLID=30706, PHYCHID=9, SCCPCHOFFSET=100, SCRAMBCODE=0, SLOTFORMAT=D10, TFCIPRESENCE=EXISTS;
ADD USCCPCHTFC: CELLID=30706, PHYCHID=9, CTFC=0;ADD USCCPCHTFC: CELLID=30706, PHYCHID=9, CTFC=1;ADD USCCPCHTFC: CELLID=30706, PHYCHID=9, CTFC=2;ADD USCCPCHTFC: CELLID=30706, PHYCHID=9, CTFC=3;ADD USCCPCHTFC: CELLID=30706, PHYCHID=9, CTFC=4;ADD USCCPCHTFC: CELLID=30706, PHYCHID=9, CTFC=5;ADD USCCPCHTFC: CELLID=30706, PHYCHID=9, CTFC=6;
ADD UFACH: CELLID=30706, PHYCHID=9, TRCHID=4, RATEMATCHINGATTR=220, TOAWS=35, TOAWE=10, MAXFACHPOWER=30,
CHCODINGTYPE=CONVOLUTIONAL;ADD UFACH: CELLID=30706, PHYCHID=9, TRCHID=5,
RATEMATCHINGATTR=130, TOAWS=35, TOAWE=10, MAXCMCHPI=D13, MINCMCHPI=D0, SIGRBIND=FALSE, CHCODINGTYPE=TURBO;ADD UFACHDYNTFS:CELLID=30706, TRCHID=4, RLCSIZE=168,
TFSNUMBER=D3, TBNUMBER1=0, TBNUMBER2=1, TBNUMBER3=2;ADD UFACHDYNTFS:CELLID=30706, TRCHID=5, RLCSIZE=360,
TFSNUMBER=D3, TBNUMBER1=0, TBNUMBER2=1, TBNUMBER3=2;ADD UFACHLOCH: CELLID=30706, TRCHID=4;ACT USCCPCH: CELLID=30706, PHYCHID=9;
ACT UCELL: CELLID=30706;
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3G Huawei-HSDPA & HSUPADetails of Parameter
Equipment Tech Parameter Name Category Purpose Applicable Condition Cons Severity Command Sample (Optional)
Huawei 3G EAGCHCODENUMHSDPA
Throughput
increase EAGCHCODENUM, E.g
from 1 to 2
When HSUPA Throughput is low,
suitable to optimize adhoc site
such as VIP site
higher value will waste downlink codes R4 ADD UCELLHSUPA:CELLID=31890,EAGCHCODENUM=2;
Huawei 3G RSCALLOCMHSDPA
Throughput
Change NodeB Resource allocation mode to Power
Code Balance
When HSDPA Throughput is low,
suitable to optimize adhoc site
such as VIP site
SET MACHSPARA:LOCELL=4,RSCALLOCM=POWERCO
DE_BAL;R4 SET MACHSPARA:LOCELL=4,RSCALLOCM=POWERCODE_BAL;
Huawei 3G MAXTARGETULLOADFACTOR
HSUPA Throughp
utIncrease UL Load Factor
of HSUPALow Throughput in
Cell Level MOD UCELLHSUPA: CellId=1, MAXTARGETULLOADFACTOR=90;
Huawei 3G HSPAPOWERHSDPA
Throughput
Increase HSDPA Power Low Throughput in Cell Level MOD UCELLHSDPA: CellId=1, HspaPower=0;
Huawei 3G SMHSDPA
Throughput
Change MACHSPARA SM to MAXCI
Low Throughput in Cell Level SET MACHSPARA:LOCELL=1,SM=MAXCI;
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3G Huawei-Overall Block & PagingDetails of Parameter
Equipment Tech Parameter Name Category Purpose Applicable
Condition Cons Severity Command Sample (Optional)
Huawei 3G CSRABCacOptSwitchOverall 3G
Radio Blocking
Enable loose CAC algorithm for CS RAB
When Cell having Low accessibility due CS RAB Congestion
>0.5%
PS service setup success rate and the cell capacity for PS
services will decrease in the case of cell
resource congestion
R4 MOD UCELLALGOSWITCH:CELLID=XXXXX,CSRABCACOPTSWITCH=ON;
Huawei 3G HoASUtmrOverall 3G
Radio Blocking
Increase HoASUtmrwhen many cells is
having High Drop CS due to ASU/SRB
Reset
SHO Overhead will be degraded R3 SET USTATETIMER:HOASUTMR=8000;
Huawei 3G SSEARCHRATOverall 3G
Radio Blocking
time being increase SSEARCHRAT >0
when many cells is having High Drop CS due to interference,
DCR >1%
Traffic aggresively to 2G R4 ADD UCELLSELRESEL:CELLID=XXXXX,SSEARCHRAT=0;
Huawei 3G SMPAGECTHD & SMPAGERTHD Paging
Increase SMS Threshold e.g from
SMPAGECTHD=85,SMPAGERTHD=75 to
SMPAGECTHD=95,SMPAGERTHD=85;
RNC High Paging deletion
(VS.Paging.FC.Disc.Num.CPUS)
increase CPU Load R3 SET FCCPUTHD:BRDCLASS=XPU,SMPAGECTHD=95,SMPAGERTHD=85;
Huawei 3G DLLDRTRIGTHDOverall 3G
Radio Blocking
set DLLDRTRIGTHD to lower value
Cell with High DL Power Blocking .To
implement many cell need consider
Processor Load is low to Medium
impact to processor load if too many cells
implementedR4 ADD UCELLLDM:CELLID=31890,DLLDRTRIGTHD=80;
Huawei 3G DLLDRRELTHDOverall 3G
Radio Blocking
set DLLDRTRIGTHD to lower value
Cell with High DL Power Blocking .To
implement many cell need consider
Processor Load is low to Medium
impact to processor load if too many cells
implementedR4 ADD UCELLLDM:CELLID=31890,DLLDRTRIGTHD=80;
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3G Huawei-RTWPDetails of Parameter
Equipment Tech Parameter Name Category Purpose Applicable
Condition Cons Severity Command Sample (Optional)
Huawei 3G BeHsupa2msTTIratethd RTWP increase Threshold of selecting TTI 2ms for
HSUPA
UL CE Congestion, UL Power
Congestion >0.5%
user perceive will degraded with higher threshold to HO from
10ms to 2ms TTIR3 SET UFRC:BEHSUPA2MSTTIRATETHS=D1024;
Huawei 3G CQIFbCk, CQIFbCkforSHO RTWP Reduce Uu Load & improve RTWP to increase CS Traffic
Cell having high DCR CS with High RTWP
indication R4
MOD UCELLHSDPCCH:CELLID=XXXXX,CQIFBCK=D20,CQIFBCKFORSHO=
D20
Huawei 3G RLMAXDLPWR & RLMINDLPWR RTWP
Increase RLMAXDLPWR & RLMINDLPWR (eg: 0/-150
to 20/-130)
when cell is having High Drop CS due to
RL/No Reply & Power Blocking is
low (suggest on cell with high power
Capacity & DL Power cong <0.5%)
DL Power Cong will increase R4 MOD UCELLRLPWR:RLMAXDLPWR=20, RLMINDLPWR=-130
Huawei 3G TrigRatioforUlRTWP RTWP Increase
TrigRatiororUlRTWP e.g 75 to 90
Cell with High RTWP and no congestion
issue
Might impact to capacity since UE QOS will trigger to TTI 2ms in case of
overload
R4 MOD UCELLLDM:CELLID=XXXXX,TRIGRATIOFORULRTWP=73;
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3G Huawei-Power/Code BlockingDetails of Parameter
Equipment Tech Parameter Name Category Purpose Applicable
Condition Cons Severity Command Sample (Optional)
Huawei 3G DLLDRFIRSTACTIONPower/Code
Blocking Rearange LDR Sequence
When Cell having Low accessibility due
High DL Power Cong/Code Cong
>0.5%
R4 MOD UCELLLDR: CELLID=1, DLLDRFIRSTACTION=CodeAdj;
Huawei 3G DLLDRSECONDACTIONPower/Code
Blocking Rearange LDR Sequence
When Cell having Low accessibility due
High DL Power Cong/Code Cong
>0.5%
R4 MOD UCELLLDR: CELLID=1, DLLDRSECONDACTION=InterFreqLDHO;
Huawei 3G DLLDRTHIRDACTIONPower/Code
Blocking Rearange LDR Sequence
When Cell having Low accessibility due
High DL Power Cong/Code Cong
>0.5%
R4 MOD UCELLLDR: CELLID=1, DLLDRTHIRDACTION=BERateRed;
Huawei 3G DLLDRFOURTHACTIONPower/Code
Blocking Rearange LDR Sequence
When Cell having Low accessibility due
High DL Power Cong/Code Cong
>0.5%
R4 MOD UCELLLDR: CELLID=1, DLLDRFOURTHACTION=CSInterRatShouldNotLDHO;
Huawei 3G DLLDRFIFTHACTIONPower/Code
Blocking Rearange LDR Sequence
When Cell having Low accessibility due
High DL Power Cong/Code Cong
>0.5%
R4 MOD UCELLLDR: CELLID=1, DLLDRFIFTHACTION=PSInterRatShouldNotLDHO;
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3G Huawei-Power/Code BlockingDetails of Parameter
Equipment Tech Parameter Name Category Purpose Applicable
Condition Cons Severity Command Sample (Optional)
Huawei 3G DLLDRFIRSTACTIONPower/Code
Blocking Rearange LDR Sequence
When Cell having Low accessibility due
High DL Power Cong/Code Cong
>0.5%
R4 MOD UCELLLDR: CELLID=1, DLLDRFIRSTACTION=CodeAdj;
Huawei 3G DLLDRSECONDACTIONPower/Code
Blocking Rearange LDR Sequence
When Cell having Low accessibility due
High DL Power Cong/Code Cong
>0.5%
R4 MOD UCELLLDR: CELLID=1, DLLDRSECONDACTION=InterFreqLDHO;
Huawei 3G DLLDRTHIRDACTIONPower/Code
Blocking Rearange LDR Sequence
When Cell having Low accessibility due
High DL Power Cong/Code Cong
>0.5%
R4 MOD UCELLLDR: CELLID=1, DLLDRTHIRDACTION=BERateRed;
Huawei 3G DLLDRFOURTHACTIONPower/Code
Blocking Rearange LDR Sequence
When Cell having Low accessibility due
High DL Power Cong/Code Cong
>0.5%
R4 MOD UCELLLDR: CELLID=1, DLLDRFOURTHACTION=CSInterRatShouldNotLDHO;
Huawei 3G DLLDRFIFTHACTIONPower/Code
Blocking Rearange LDR Sequence
When Cell having Low accessibility due
High DL Power Cong/Code Cong
>0.5%
R4 MOD UCELLLDR: CELLID=1, DLLDRFIFTHACTION=PSInterRatShouldNotLDHO;
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3G Huawei-Power BlockingDetails of Parameter
Equipment Tech Parameter Name Category Purpose Applicable
Condition Cons Severity Command Sample (Optional)
Huawei 3G NBMULCACALGOSELSWITCH
Power Blocking
Disable uplink call admission control
algorithm
When Cell having Low accessibility due
UL Power Congestion >0.5%
Noise will increase without admission control Algorithm,
might increase RTWP/degrade EcNo
R4MOD
UCELLALGOSWITCH:CELLID=xxxxx,NBMULCACALGOSELSWITCH=ALGORITHM_OFF
Huawei 3G ULTOTALEQUSERNUM Power Blocking
Increase ULTOTALEQUSERNUM (e.g
from 160 to 180)
When Cell having Low accessibility due UL- Power Blocking for Existing value is
less than 200
If value is larger, the cell capacity for
uplink equivalent user number (ENU) is large and more users
will be admitted
R4 MOD UCELLCAC:CELLID=XXXXX,ULTOTALEQUSERNUM=180,
Huawei 3G UlOlcTrigThd Power Blocking
increase UlOlcTrigThd to 100 (while still in
ALGORITHM_OFF)
Cell with High UL Power Cong (>0.5%)after
Algorithm_OFF . To implement many cell
need consider Processor Load is low to Medium
(<70%)
impact to processor load if too many cells
implementedR4 ADD UCELLLDM:CELLID=31890,ULOLCTRIGTHD=100;
Huawei 3G RLMAXDLPWR & RLMINDLPWR
Power Blocking
decrease RLPower : RLMAXDLPWR,RLMINDLP
WR (eg. 50,-100 to 0,-150 )
When Cell having Low accessibility due High DL Power Cong
>0.5%
Fail due Uu No reply/RL fail will
increaseR4 MOD UCELLRLPWR:RLMAXDLPWR=0, RLMINDLPWR=-150
Huawei 3G DLCONVAMRTHD Power Blocking
Increase DL Power threshold for AMR
When Cell having Low accessibility due High DL Power Cong
>0.5%
Noise will increase, might increase RTWP R4 MOD UCELLCAC: CELLID=1, DLCONVAMRTHD=90;
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3G Huawei-Power BlockingDetails of Parameter
Equipment Tech Parameter Name Category Purpose Applicable
Condition Cons Severity Command Sample (Optional)
Huawei 3G DLCONVNONAMRTHD Power Blocking
Increase DL Power threshold for Non-AMR
When Cell having Low accessibility due High DL Power Cong
>0.5%
Noise will increase, might increase RTWP R4 MOD UCELLCAC: CELLID=1, DLCONVNONAMRTHD=90;
Huawei 3G DLOTHERTHD Power Blocking
Increase DL Power threshold for Other
When Cell having Low accessibility due High DL Power Cong
>0.5%
Noise will increase, might increase RTWP R4 MOD UCELLCAC: CELLID=1, DLOTHERTHD=80;
Huawei 3G DLHOTHD Power Blocking
Increase DL Power threshold for HO
When Cell having Low accessibility due High DL Power Cong
>0.5%
Noise will increase, might increase RTWP R4 MOD UCELLCAC: CELLID=1, DLHOTHD=95;
Huawei 3G DLCELLTOTALTHD Power Blocking
Increase DL Power Total threshold
When Cell having Low accessibility due High DL Power Cong
>0.5%
Noise will increase, might increase RTWP R4 MOD UCELLCAC: CELLID=1, DLCELLTOTALTHD=95;
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Vendor Tech Resource Type Congestion CounterNSN 3G UL CE rrc_conn_stp_fail_bts+rab_stp_fail_cs_voice_bts+rab_stp_fail_ps_strea_bts+rab_stp_fail_ps_inter_frozbs+rab_stp_fail
_ps_backg_frozbs+setup_fail_bts_hs_dsch_str_1+setup_fail_bts_hs_dsch_bgrNSN 3G DL CE rrc_conn_stp_fail_bts+rab_stp_fail_cs_voice_bts+rab_stp_fail_ps_strea_bts+rab_stp_fail_ps_inter_frozbs+rab_stp_fail
_ps_backg_frozbs+setup_fail_bts_hs_dsch_str_1+setup_fail_bts_hs_dsch_bgrNSN 3G UL Power rrc_conn_stp_fail_ac+rab_stp_fail_cs_voice_ac+rab_stp_fail_ps_strea_ac
+rab_stp_fail_ps_inter_ac+rab_stp_fail_ps_backg_acNSN 3G DL Power rrc_conn_stp_fail_ac+rab_stp_fail_cs_voice_ac+rab_stp_fail_ps_strea_ac
+rab_stp_fail_ps_inter_ac+rab_stp_fail_ps_backg_acNSN 3G IuB rrc_conn_stp_fail_iub_aal2+rab_stp_fail_cs_v_iub_aal2+setup_fail_iub_hs_total_str_1+setup_fail_iub_hs_total_int+se
tup_fail_iub_hs_total_bgrNSN 3G Code rrc_conn_stp_fail_ac+rab_stp_fail_cs_voice_ac+rab_stp_fail_ps_strea_ac
+rab_stp_fail_ps_inter_ac+rab_stp_fail_ps_backg_ac
3G NokiaPerformance Counter for Congestion
Step of ActionCase 1st Action 2nd Action 3rd Action
CE Blocking/CE High Util Check trending of CE Availability Physical Audit (involving TP analysis) CE license and/or board upgrade
Iub Blocking/Iub High Util Physical Audit (involving TP analysis) IuB VC Split Iub BW upgrade
DL- Power Blocking/DL - Power High Util
Physical Audit (involving TP analysis) Activate 40W, maintain existing PCPICH setting Increase PtxTarget, PtxMaxHSDPA
UL- Power Blocking Physical Audit (involving TP analysis)
Increase PrxTarget, adjust DeltaPrxMaxUp,DeltaPrxMaxDown
Code Blocking Physical Audit (involving TP analysis)
Decrease used MaxBitrateDLPSNRT (128 kbits/s, 64 kbits/s)
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2G HuaweiPerformance Counter for Congestion
Step of ActionCase 1st Action 2nd Action 3rd Action
CE Blocking/CE High Util Check trending of CE Availability Physical Audit (involving TP analysis) CE license and/or board upgrade
Iub Blocking/Iub High Util Physical Audit (involving TP analysis) IuB VC Split Iub BW upgrade
DL- Power Blocking/DL - Power High Util
Physical Audit (involving TP analysis) Activate 40W, maintain existing PCPICH setting Increase PtxTarget, PtxMaxHSDPA
UL- Power Blocking Physical Audit (involving TP analysis)
Increase PrxTarget, adjust DeltaPrxMaxUp,DeltaPrxMaxDown
Code Blocking Physical Audit (involving TP analysis)
Decrease used MaxBitrateDLPSNRT (128 kbits/s, 64 kbits/s)
Vendor Tech Resource Type Congestion CounterHuawei 2G SDCCH K3001:Failed SDCCH Seizures due to Busy SDCCHHuawei 2G TCH K3011A:Failed TCH Seizures due to Busy TCH (Traffic Channel)
Huawei 2G TBF[A9003:Number of Failed Uplink GPRS TBF Establishments due to No Channel]+[A9203:Number of Failed Uplink EGPRS TBF Establishments due to No Channel]+[A9103:Number of Failed Downlink GPRS TBF Establishments due to No Channel]+[A9303:Number of Failed Downlink EGPRS TBF Establishments due to No Channel]}
Huawei 2G PDCH[R9394:Number of PDCH Application Failures due to no Convertable TCHs]+[R9395:Number of PDCH Application failures For CELL PDCH Ratio Thresh]+[R9346:Number of Dynamic PDCH Requests Without Application Attempts Because the Number of Activated PDCHs Reaches Board Specification]+[R9347:Number of Dynamic PDCH Requests Without Application Attempts Because No Abis Timeslot is Available for Use]
Huawei 2G Abis R9347:Number of Dynamic PDCH Requests Without Application Attempts Because No Abis Timeslot is Available for Use
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2G Huawei- TCH & SDCCH BlockingDetails of Parameter
Equipment Tech Parameter Name Categor
y Purpose Applicable Condition Cons Severi
ty Command Sample (Optional)
Huawei 2G IDLESDTHRESSDCCH Blockin
g Reduce SDCCH
blockingSDCCH blocking
& Non TCH Blocking
TCH utilization R4SET
GCELLCHMGBASIC:IDTYPE=BYID,CELLID=1,IDLESDTHRES=8;
Huawei 2G TCHBUSYTHRESTCH
Blocking
Reduce SDCCH & TCH blocking
TCH blocking & SDCCH, TCH
blockingquality R4
SET GCELLCHMGAD:IDTYPE=BYID,CELLID=1,TCHBUSY
THRES=2;
Huawei 2G AMRTCHHPRIORALLOW
TCH Blockin
g Reduce SDCCH &
TCH blockingTCH blocking &
SDCCH, TCH blocking
quality R4SET
GCELLCHMGAD:IDTYPE=BYID,CELLID=1,AMRTCHHPRIORALLOW=ON,AMRTCHHPRIORLOAD=1;
Huawei 2G AMRTCHHPRIORLOAD
TCH Blockin
g Reduce SDCCH &
TCH blockingTCH blocking &
SDCCH, TCH blocking
quality R4SET
GCELLCHMGAD:IDTYPE=BYID,CELLID=1,AMRTCHHPRIORALLOW=ON,AMRTCHHPRIORLOAD=1;
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2G Huawei- PDSCH BlockingDetails of Parameter
Equipment Tech Parameter Name Categor
y Purpose Applicable Condition Cons Severi
ty Command Sample (Optional)
Huawei 2G MAXPDCHRATEPDCH
Blocking
Reduce PDCH blocking
PDCH blocking due to no
Convertable TCHs
Throughput R4 SET GCELLPSCHM: IDTYPE=BYID, CELLID=0, MAXPDCHRATE=80;
Huawei 2G PDCHUPLEVPDCH
Blocking
Reduce TBF congestion
PDCH blocking due to CELL PDCH Ratio
Thresh Throughput R4
SET GCELLPSCHM:IDTYPE=BYID,CELLID=1,PDCHUPLEV
=70;
Huawei 2G PDCHDWNLEVPDCH
Blocking
Reduce TBF congestion
PDCH blocking due to CELL PDCH Ratio
Thresh Throughput R4
SET GCELLPSCHM:IDTYPE=BYID,CELLID=1,PDCHDWNL
EV=160;
Huawei 2G UPDYNCHNTRANLEV
PDCH Blockin
g Reduce TBF congestion
PDCH blocking due to no
Convertable TCHs
Throughput R4SET
GCELLPSCHM:IDTYPE=BYID,CELLID=1,UPDYNCHNTRANLEV=70;
Huawei 2G DWNDYNCHNTRANLEV
PDCH Blockin
g Reduce TBF congestion
PDCH blocking due to no
Convertable TCHs
Throughput R4SET
GCELLPSCHM:IDTYPE=BYID,CELLID=1,DWNDYNCHNTRANLEV=80;
Huawei 2G PSServiceBusyThreshold
PDCH Blockin
g Reduce TBF congestion
PDCH blocking due to no
Convertable TCHs
Throughput R4SET
GCELLPSCHM:IDTYPE=BYID,CELLID=1,PSSERVICEBUSYTHRESHOLD=40;
Huawei Confidential
2G NokiaPerformance Counter for Congestion
Step of Action
Vendor Tech Resource Type Congestion CounterNokia 2G SDCCH 100 * ([SDCCH_BUSY_ATT] - [TCH_SEIZ_DUE_SDCCH_CON])/[SDCCH_SEIZ_ATT])Nokia 2G TCH 100 * ([TCH_REQUESTS_CALL_ATTEMPT] - [SUCC_TCH_SEIZ_CALL_ATTEMPT])/[TCH_REQUESTS_CALL_ATTEMPT]Nokia 2G PDCH 100 * ([NO_RADIO_RES_AVA_DL_TBF] + [NO_RADIO_RES_AVA_UL_TBF])/([NBR_OF_DL_TBF] + [NBR_OF_UL_TBF])Nokia 2G Abis dl_tbfs_with_inadeq_edap_res + ul_tbfs_without_edap_res
Type Blocking Analyze Action
CS Blocking & Non PS blocking
SDCCH blocking & Non TCH Blockingcheck channel availability rate (TCH Availability) & Transmission performance, any intermittent or not (Alarm). If all Ok then do the action coloum
1.Reduce CRH (Cell Reselect Hysteresis = HYS) if site in the LAC border area and increase CRH for the NR cell in another LAC2.Reduce CRO (Cell Resellect Offset =REO) or make negative value by set Penalty Time (PET) to 640s3.Add fix SDCCCH channel
TCH Blocking & Non SDCCH blockingcheck channel availability rate (TCH Availability) & Transmission performance, any intermittent or not (Alarm). If all Ok then do the action coloum
1. increase (btsSpLoadDepTchRateLower = FRL) & (btsSpLoadDepTchRateUpper=FRU) maximum value is 902. Increase (amrSegLoadDepTchRateLower = AFRL) & (amrSegLoadDepTchRateUpper = AFRU)3. Change SDCCH &PDCH to TCH channel4. Reduce hoMarginPbgt from blocking cell and increase hoMarginPbgt to NR cell that is no blocking
TCH Blocking & SDCCH blockingcheck channel availability rate (TCH Availability) & Transmission performance, any intermittent or not (Alarm). If all Ok then do the action coloum
1. same as upper reduce SDCCH & TCH blocking 2. Change PDCH to TCH if PDCH not blocking or less3.upgrade TRX
PS Blocking & Non CS blocking
PS Blocking, TCH not Blockingcheck channel availability rate (TCH Availability) & Transmission performance, any intermittent or not (Alarm). If all Ok then do the action coloum
1.Add Dedicated GPRS Capactity (CDED) by increase the number2. Add Default GPRS Capacity (CDEF) byt increase the number (Dynamic)
PS Blocking (Abis)check channel availability rate (TCH Availability) & Transmission performance, any intermittent or not (Alarm). If all Ok then do the action coloum
1. Reduce egprsInitMcsAckMode (MCA) & egprsInitMcsUnAckMode (MCU)
Huawei Confidential
2G Nokia – TCH & PDCH BlockingDetails of Parameter
Equipment Tech Parameter Name Category Purpose Applicable Condition Cons Severity
Nokia 2G btsSpLoadDepTchRateLower (FRL)
TCH Blocking Reduce TCH Blocking TCH Blocking Rate > 1% Degraded voice quality
and SQI R3
Nokia 2G btsSpLoadDepTchRateUpper (FRU)
TCH Blocking Reduce TCH Blocking TCH Blocking Rate > 1% Degraded voice quality
and SQI R3
Nokia 2G amrSegLoadDepTchRateLower (AFRL)
TCH Blocking Reduce TCH Blocking TCH Blocking Rate > 1% Degraded voice quality
and SQI R3
Nokia 2G amrSegLoadDepTchRateUpper (AFRU)
TCH Blocking Reduce TCH Blocking TCH Blocking Rate > 1% Degraded voice quality
and SQI R3
Nokia 2G hoMarginPbgt TCH Blocking Reduce TCH Blocking TCH Blocking Rate > 1% Degraded voice quality
and SQI R3
Nokia 2G dedicatedGPRSCapacity (CDED)
PDCH Blocking Reduce PDCH Blocking PDCH Blocking Rate >
1%Possible increase TCH
Blocking R3
Nokia 2G defaultGPRSCapacity (CDEF) PDCH Blocking Reduce PDCH Blocking PDCH Blocking Rate >
1%Possible increase TCH
Blocking R3
Nokia 2G egprsInitMcsAckMode (MCA) PDCH Blocking Reduce PDCH Blocking PDCH Blocking Rate >
1%Possible increase TCH
Blocking R3
Nokia 2G egprsInitMcsUnAckMode (MCU)
PDCH Blocking Reduce PDCH Blocking PDCH Blocking Rate >
1%Possible increase TCH
Blocking R3
Huawei Confidential
2G SiemensPerformance Counter for Congestion
Step of Action
Vendor Tech Resource Type Congestion CounterSiemens 2G SDCCH ATSDCMBS / NATTSDPE
Siemens 2G TCH (ATCHSMBS_1 + ATCHSMBS_2) /(ATTCHSEI_1 +ATTCHSEI_2) --> excluding A-bis blocking(ATCHSMBS_1 + ATCHSMBS_2 + ATCHSMBS_3 + ATCHSMBS_4) /(ATTCHSEI_1 +ATTCHSEI_2) --> including A-bis blocking
Siemens 2G PDCH REJPDASS_1..37 / (NUACATCL_3 + NUACATCL_6)
Siemens 2G Abis ABISPSUP[7]/(ABISPSUP[6] + ABISPSUP[7])
Type Blocking First step Second step
CS Blocking & Non PS blocking
SDCCH blocking & Non TCH Blocking
check channel availability rate & Abis transmission availiblity rate,any intermittent rise TT (cause maybe due to Abis problem)
1. Reduce SDCCHCONGTH (70 --> 50/40)2. Increase CELLRESH (LAC border area)3. Change TCH_HLF timeslot to TCHSD timeslot4. Add fix SDCCH timeslot4. Reduce RACHBT (109 --> 106)
TCH Blocking & Non SDCCH blocking
check channel availability rate & Abis transmission availiblity rate,any intermittent rise TT (cause maybe due to Abis problem)
1. Reduce HRACCT1 and HRACTAMRACT12. Reduce GPDPDTCH3. Reduce GMANPRESPRM & EMANPRESPRM4. Increase SDCCHCONGTH (max: 100)
TCH Blocking & SDCCH blocking
check channel availability rate & Abis transmission availiblity rate,any intermittent rise TT (cause maybe due to Abis problem)
1. Same as upper reduce SDCCH & TCH blocking 2. Increase PWRRED to 23. Upgrade TRX
PS Blocking & Non CS blocking
PS Blocking -> due to no PDCH resource
check channel availability rate & Abis transmission availiblity rate,any intermittent rise TT (cause maybe due to Abis problem)
1. Increase GMANPRESPRM & EMANPRESPRM2. Increase GPDPDTCH
PS Blocking -> due to PDT resource
check channel availability rate & Abis transmission availiblity rate,any intermittent rise TT (cause maybe due to Abis problem) Rebalancing PRPTPGID
PS Blocking-> no Abis Timeslot is Available 1. Change GASTRABISTH to 60-70-40-50
2. Add SUBTSLB on A-bis
CS Blocking & PS blocking check channel availability rate & Abis transmission availiblity rate,any
intermittent rise TT (cause maybe due to Abis IP capacity problem)
1.Upgrade TRX or Abis transmission capacity 2.If upgrade limit,change PDCH to TCH (CS high priority)
3.Load sharing to 3G, FDD Qmin (7-->6[max -14db]) & SSEARCHRAT (2-->0)
2G/3G reselection ( traffic share)
1.Inter-RAT Cell Reselection Enable(IRAT reseclection)2.Qsearch C Initial(seach 3G in Idle mode)3.Qsearch I(7=always seach 3G)4.FDD Qmin (3G candidate cells EC/NO threshold)5.FDD Qmin Offset(candidate cells EC/NO offset)
Huawei Confidential
2G Siemens – SDCCH, TCH, PDCH, Abis, Blocking & PCU Load
Details of Parameter
Equipment Tech Parameter Name Category Purpose Applicable Condition Cons Severity
Siemens 2G SDCCHCONGTH SDCCH Blocking Reduce SDCCH Blocking SDCCH Utilization >
80%Possible increase TCH
Blocking R3
Siemens 2G HRACTT1, HRAMRHRACT1 TCH Blocking Reduce TCH Blocking TCH Blocking Rate >
1%Degraded voice quality
and SQI R3
Siemens 2G GPDPDTCHA PDCH Blocking
Increase/decrease dynamic PDCH allocation to reduce
PDCH BlockingPDCH Blocking Rate >
1%Possible increase TCH
Blocking R3
Siemens 2G GASTRABISTH Abis Blocking
Reduce A-bis pool blocking in order to improve PDASR
Abis Pool Loss Rate > 0.5% Low throughput R3
Siemens 2G CHTYPE=SDCCH (from TCH) SDCCH Blocking
Reduce SDCCH Blocking with change Channel Type from
TCH to SDCCHSDCCH Blocking >
0.5%Possible increase TCH
Blocking R3
Siemens 2G CHTYPE=TCH (from SDCCH) SDCCH Blocking
Reduce TCH Blocking with change Channel Type from
SDCCH to TCH
TCH Blocking > 1% AND SDCCH
Utilization < 50%Possible increase SDCCH Blocking R3
Siemens 2G CHTYPE=CCCH (from TCH) SDCCH Blocking
Resolve AGCH and PCH overload with change
Channel Type from TCH to CCCH
PCH load + AGCH load > 80%
Possible increase TCH Blocking R2
Siemens 2G INIMCSDL PCU Load To reduce initial Coding Scheme
PCU Load > 90% and PDCH Blocking Rate >
1%Low throughput R3
Huawei Confidential
Supporting Document
Congestion Guideline
For other Radio Optimization guide, please spare time to download & read through below NIA FTP link :
/00_G. SME DEPARTMENT/00_C. TECHNICAL DOCUMENTS/05. GUIDELINE & DOCUMENTS
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