CE Cong Issue Troubleshooting Step and Guidence - Good Ref
CE Cong Issue Troubleshooting Step and Guidence - Good Ref
CE Cong Issue Troubleshooting Step and Guidence - Good Ref
(Huawei)
RF
Coverage
Condition
Problem
Transport Network
Failures
Iub
Transmissio
n Problem
Other
Transmissio
n Problem
Proposed Parameter: (1st Batch)- INTRARELTHDFOR1BCSNVP Changed from 12 to 10 and INTRARELTHDFOR1BPS - Changed
from 12 to 10. Both INTRARELTHDFOR1BCSNVP and INTRARELTHDFOR1BPS were
changed to increase
4. Check the Best Effort Traffic Initial Access Rate- RNC Level Parameter
(UlBeTraffInitBitrate, DlBeTraffInitBitrate), Modify the DCH initial access
rate/DCCC rate threshold/low activity bit rate threshold from 64kbps to 32
kbps.
o SET UFRC: UlBeTraffInitBitrate=D32, DlBeTraffInitBitrate=D32;
o SET UDCCC: UlDcccRateThd=D32,
DlDcccRateThd=D32,LittleRateThd=D32;
5. Check the UL HSUPA Traffic Initial Access Rate (HsupaInitialRate), Modify the
HSUPA initial access rate/DCCC uplink bit rate threshold/low activity bit rate
threshold from 64kbps to 32 kbps.
o SET UFRC: HsupaInitialRate =D32;
o SET UEDCHRATEADJUSTSET: EdchRateAdjustSet=RATE_32KBPS1&RATE_128KBPS-1&RATE_608KBPS-1;
6. Check the UL GBR setting (RNC Level Parameter), if the parameter is greater
than 32kbps, => Recommend to change the UL GBR to 32kbps for all GBR
related services.
UL GBR setting: SET USERGBR:TRAFFICCLASS=BACKGROUND,
BEARTYPE=R99, USERPRIORITY=SILVER, <ULGBR>=D32;
UL GBR setting: SET USERGBR:TRAFFICCLASS=BACKGROUND,
BEARTYPE=R99, USERPRIORITY=GOLD, <ULGBR>=D32;
UL GBR setting: SET USERGBR:TRAFFICCLASS=BACKGROUND,
BEARTYPE=R99, USERPRIORITY=COPPER, <ULGBR>=D32;
UL GBR setting: SET USERGBR:TRAFFICCLASS=BACKGROUND,
BEARTYPE=HSPA, USERPRIORITY=SILVER, <ULGBR>=D32;
UL GBR setting: SET USERGBR:TRAFFICCLASS=BACKGROUND,
BEARTYPE=HSPA, USERPRIORITY=GOLD, <ULGBR>=D32;
UL GBR setting: SET USERGBR:TRAFFICCLASS=BACKGROUND,
BEARTYPE=HSPA, USERPRIORITY=COPPER, <ULGBR>=D32;
7. Check and Modify the DCH/HSUPA DCCC 4A threshold and limit user rate
upgrade,
For DCH BE Service, 4A threshold default value is
1K for each rate.It need to confirm what is the appropriate 4A value in order
limit rate upgrade.
For Example:
o MOD UTYPRABDCCCMC:
RabIndex=43,Direction=UPLINK,Event4aThd=D2K;//Assume 43 is index
of interactive Service 32kbps,4A threshold is modified to 2K
o MOD UTYPRABDCCCMC: RabIndex=45,Direction=
UPLINK,Event4aThd=D6K;// Assume 45 is index of interactive Service
128kbps,4A threshold is modified to 6K
For HSUPA BE Service, it can modified HSUPA DCCC threshold rate ratio to
higher value for different rate.
For Example:
o
8. Enable the TTI Dynamic adjustment algorithm for admission CE-Based HSUPA
Services.
o SET UCORRMALGOSWITCH:
DraSwitch=DRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH-1;\\ TTI Switch
o MOD UCELLLDR: CellId=1111,UlTtiCreditSfResThd=SF8;\\TTI
Reconfigure Cell Threshold
o MOD UNODEBLDR: NodeBName= aaaa,
UlTtiCreditSfResThd=SF8;\\TTI Reconfigure NodeB Threshold
9. Enable PS BE\HSDPA\HSUPA state transition.
o SET UCORRMALGOSWITCH:
DraSwitch=DRA_HSDPA_STATE_TRANS_SWITCH1&DRA_HSUPA_STATE_TRANS_SWITCH-1&PS_BE_STATE_
TRANS_SWITCH-1;
10.Modify Credit SF reserved threshold (ULHOCERESVSF, DLHOCECODERESVSF)
from (SF16->SF32 ,SF32->SF64).It Reducing CE consume for Uplink
/Downlink for handovers.
11.Check Rate Control Switch Parameter- RNC Level Parameter (RNC Level
Parameter), if DCCC feature is disabled => Recommend to enable DCCC
feature to alleviate code resource usage.
Rate Control Switch Parameter: SET CORRMALGOSWITCH:
DraSwitch=<DRA_DCCC_SWITCH>-1
12.Check Rate Control Switch for HSUPA status (Parameter), if DCCC for HSUPA is
disabled => Recommend to enable DCCC for HSUPA feature to alleviate
channel element resource usage
o SET CORRMALGOSWITCH: DraSwitch=<DRA_HSUPA_DCCC_SWITCH>-0;
13.Check Load Control Switch Parameter and Load Control Action (Parameter), if
Load Control feature is disabled => Recommend to enable load control to
alleviate code resource usage. Make actions of Rate Adjustment and InterFreq LDHO higher priority over other actions
//Enabling load reshuffling algorithms
1) MOD UCELLALGOSWITCH: CellId=100, NBMLdcAlgoSwitch=UL_UU_LDR1&DL_UU_LDR-1&CELL_CODE_LDR-1&CELL_CREDIT_LDR-1;
2)SET ULDCALGOPARA: LdcSwitch=NODEB_CREDIT_LDR_SWITCH1&LCG_CREDIT_LDR_SWITCH-1;
3)MOD UNODEBALGOPARA: NodeBName="nodeb1", NodeBLdcAlgoSwitch=IUB_LDR1&NODEB_CREDIT_LDR-1&LCG_CREDIT_LDR-1;
16.Check RRC DRD feature status (RNC Level Parameter), if it is disabled =>
recommend to enable this feature
o RRC DRD Feature Switch:
SET CORRMALGOSWITCH: DrSwitch=<DR_RRC_DRD_SWITCH>-1;
17.Check Cell Peak UL CE Usage (KPI) and calculate the NodeB UL CE Mean
Usage Ratio (KPI) for the past 2 weeks, if Cell Peak UL CE Usage > 80% and
NodeB UL CE Mean Usage Ratio (KPI) >70% for more than 7 days, and if RRC
Redirection and RRC DRD feature (Parameter) are enabled => Continuous
High UL CE Usage is noticed, and it is recommended to increase UL CE
Configuration
o RRC Redirection After RRC DRD Fail Feature Switch:
SET DRD: <ConnectFailRrcRedirSwitch>=Allowed_To_Inter_RAT;
Check Cell Peak DL CE Usage for this cell (KPI) and calculate the NodeB Mean
DL CE Usage Ratio for the past 2 weeks, if Cell Peak DL CE Usage>80% and
NodeB Mean DL CE Usage Ratio (KPI) >70% for more than 7 days, and if RRC
Redirection and RRC DRD feature (Parameter) are enabled => Continuous
High DL CE Usage is noticed, and it is recommended to increase DL CE
Configuration