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High code and DL power congestion issue
High code and DL power congestion issue
HUAWEI TECHNOLOGIES CO., LTD. Oct 2013
Prepared by: Mr. Sanjeev K Sharma Staff ID-00702301 Dept. GSRC India
2015-07-03
HUAWEI CONFIDENTIAL
Page1, Total13
High code and DL power congestion issue
Sympto ms In country X, City Y, Customer complaint about Capacity issue and low HSUPA throughput during Special events. Complaint area is hot spot and mostly special event happened there.
Alarm No Active alarm on surrounding sites.
2015-07-03
HUAWEI CONFIDENTIAL
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High code and DL power congestion issue
1.
Cause Analysis Congestion KPIs analysis:- From the KPI can see many code cong and DL Power cong.
2. Parameter setting verification
Network recommended value
Current setting
Network recommended value
Current setting
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High code and DL power congestion issue
Network recommended value
Current setting
2. DT held at the complaint spot. I-Site location
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High code and DL power congestion issue
ii. Google Location
iii.Outdoor test RSCP
iv. Outdoor Test ECNO
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High code and DL power congestion issue
From the above test result, RSCP and ECNO are quite good at the complaint location. We notice that there is not any coverage problem. Only problem of high traffic during the special event that’s why get customer complaint.
Handling Process
1. Handling Parameter optimization Purpose to implement below action to reduce DL power congestion and code congestion: 1- Purpose to change PCPICH power and Maxtxpower setting on site NTB6709 as below: CELL NAME
PCPICH-
PCPICH-
Maxtxpower-
Maxtxpower
current
recommend
current
-recommend
CI
NTB6709U_8NB01_S03
722
300
310
400
NTB6709V_8NB01_S01
12547
330
310
430
NTB6709V_8NB01_S03
12557
300
310
400
NTB6709W_8NB01_S01
22337
330
310
430
NTB6709W_8NB01_S03
22347
300
310
400
430 430 430
2- Change HSPDSCH Code number from 5 to 2. 3- Downlink CAC parameter optimization as below standard:
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HUAWEI CONFIDENTIAL
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High code and DL power congestion issue
DLCONVAMRTH D
DLCONVNONAMRTH D
DLOTHERTH D
DLHOTH D
DLCELLTOTALTHD
90
90
85
92
95
4- Down link LDR action changing as below standard DLLDRFIRSTACTION
DLLDRSECONDACTION
DLLDRTHIRDACTION
CodeAdj
BERateRed
InterFreqLDHO
5- Common channel power changing Current Value
Recommend Value
PSCHPower
-5
-8
MOD UCELL
SSCHPower
-5
-8
MOD UCELL
BCHPower
-2
-5
MOD UAICHPWROFFSET
AICHPowerOffset
-6
-9
MOD UPICHPWROFFSET
PICHPowerOffset
-7
-10
MOD USCCPCH
PCHPower
-2
-5
Command
Parameter
MOD UCELL
6- LDM parameter changing to make UE entry LDR status quicker current
value
recommend value
DLLDRTRIGTHD
DLLDRRELTHD
70
60
60
50
7- 1B event threshold changing to make UE leave active set easier and reduce SHO overhead. current value
2015-07-03
INTRARELTHDFOR1BCSVP
INTRARELTHDFOR1BCSNVP
INTRARELTHDFOR1BPS
-12
-12
-12
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High code and DL power congestion issue
Result recommend
value
-10
-10
-10
Parameter changing script:
Parameter changing mml.txt
Application of Cell is recommended to satisfy high traffic requirement.
After Change parameter KPI Get normal. RRC Setup Success Ratio (service)(%)
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High code and DL power congestion issue
CS RAB Setup Success Ratio (Cell)(%)
RAB Establishment Success Rate - PS(%)
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High code and DL power congestion issue
VS.CS.AMR.Call.Drop.Cell.Rate(%)
VS.PS.Call.Drop.Cell.Rate(%)
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High code and DL power congestion issue
VS.RRC.Rej.Sum
VS.RAB.FailEstabCS.Cong
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High code and DL power congestion issue
VS.RAB.FailEstabPS.Cong
ForSugges such kind of issue, you can have try by changing the suggested parameter. tion
