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

Huawei Confidential

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


2G Siemens•CS Blocking & Non PS blocking


•CS Blocking & PS blocking

•2G/3G reselection ( traffic share)

HUAWEI-H3I MANAGED SERVICES INDONESIA

Huawei Confidential

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

Huawei Confidential

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;

Huawei Confidential

3G Huawei-FACHDetails of Parameter



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;

Huawei Confidential

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;

Huawei Confidential

3G Huawei-Overall Block & PagingDetails of Parameter



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


implementedR4 ADD UCELLLDM:CELLID=31890,DLLDRTRIGTHD=80;

Huawei Confidential

3G Huawei-RTWPDetails of Parameter



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;

Huawei Confidential

3G Huawei-Power/Code BlockingDetails of Parameter



Huawei 3G DLLDRFIRSTACTIONPower/Code

Blocking Rearange LDR Sequence


High DL Power Cong/Code Cong

>0.5%

R4 MOD UCELLLDR: CELLID=1, DLLDRFIRSTACTION=CodeAdj;

Huawei 3G DLLDRSECONDACTIONPower/Code




>0.5%

R4 MOD UCELLLDR: CELLID=1, DLLDRSECONDACTION=InterFreqLDHO;

Huawei 3G DLLDRTHIRDACTIONPower/Code




>0.5%

R4 MOD UCELLLDR: CELLID=1, DLLDRTHIRDACTION=BERateRed;

Huawei 3G DLLDRFOURTHACTIONPower/Code




>0.5%

R4 MOD UCELLLDR: CELLID=1, DLLDRFOURTHACTION=CSInterRatShouldNotLDHO;

Huawei 3G DLLDRFIFTHACTIONPower/Code




>0.5%

R4 MOD UCELLLDR: CELLID=1, DLLDRFIFTHACTION=PSInterRatShouldNotLDHO;

Huawei Confidential

3G Huawei-Power/Code BlockingDetails of Parameter



Huawei 3G DLLDRFIRSTACTIONPower/Code




>0.5%

R4 MOD UCELLLDR: CELLID=1, DLLDRFIRSTACTION=CodeAdj;

Huawei 3G DLLDRSECONDACTIONPower/Code




>0.5%

R4 MOD UCELLLDR: CELLID=1, DLLDRSECONDACTION=InterFreqLDHO;

Huawei 3G DLLDRTHIRDACTIONPower/Code




>0.5%

R4 MOD UCELLLDR: CELLID=1, DLLDRTHIRDACTION=BERateRed;

Huawei 3G DLLDRFOURTHACTIONPower/Code




>0.5%

R4 MOD UCELLLDR: CELLID=1, DLLDRFOURTHACTION=CSInterRatShouldNotLDHO;

Huawei 3G DLLDRFIFTHACTIONPower/Code




>0.5%

R4 MOD UCELLLDR: CELLID=1, DLLDRFIFTHACTION=PSInterRatShouldNotLDHO;

Huawei Confidential

3G Huawei-Power BlockingDetails of Parameter



Huawei 3G NBMULCACALGOSELSWITCH

Power Blocking

Disable uplink call admission control

algorithm


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%)


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


>0.5%

Noise will increase, might increase RTWP R4 MOD UCELLCAC: CELLID=1, DLCONVAMRTHD=90;

Huawei Confidential

3G Huawei-Power BlockingDetails of Parameter



Huawei 3G DLCONVNONAMRTHD Power Blocking

Increase DL Power threshold for Non-AMR


>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


>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


>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


>0.5%

Noise will increase, might increase RTWP R4 MOD UCELLCAC: CELLID=1, DLCELLTOTALTHD=95;

Huawei Confidential

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


Physical Audit (involving TP analysis) Activate 40W, maintain existing PCPICH setting Increase PtxTarget, PtxMaxHSDPA


Increase PrxTarget, adjust DeltaPrxMaxUp,DeltaPrxMaxDown


Decrease used MaxBitrateDLPSNRT (128 kbits/s, 64 kbits/s)

Huawei Confidential

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


Physical Audit (involving TP analysis) Activate 40W, maintain existing PCPICH setting Increase PtxTarget, PtxMaxHSDPA


Increase PrxTarget, adjust DeltaPrxMaxUp,DeltaPrxMaxDown


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

Huawei Confidential

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;

Huawei Confidential

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


Convertable TCHs

Throughput R4SET

GCELLPSCHM:IDTYPE=BYID,CELLID=1,UPDYNCHNTRANLEV=70;

Huawei 2G DWNDYNCHNTRANLEV

PDCH Blockin



Convertable TCHs

Throughput R4SET

GCELLPSCHM:IDTYPE=BYID,CELLID=1,DWNDYNCHNTRANLEV=80;

Huawei 2G PSServiceBusyThreshold

PDCH Blockin



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)


and SQI R3

Nokia 2G amrSegLoadDepTchRateLower (AFRL)


and SQI R3

Nokia 2G amrSegLoadDepTchRateUpper (AFRU)


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 >


Blocking R3

Nokia 2G egprsInitMcsAckMode (MCA) PDCH Blocking Reduce PDCH Blocking PDCH Blocking Rate >


Blocking R3

Nokia 2G egprsInitMcsUnAckMode (MCU)

PDCH Blocking Reduce PDCH Blocking PDCH Blocking Rate >


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


1. Reduce HRACCT1 and HRACTAMRACT12. Reduce GPDPDTCH3. Reduce GMANPRESPRM & EMANPRESPRM4. Increase SDCCHCONGTH (max: 100)

TCH Blocking & SDCCH blocking


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


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 >


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 >


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

!!! Please use document as internal consume, not to be share to inappropriate subject

Documents

Congestion or Low Throughput Mitigation Strategy