VMS5 Optimization Weekly Report Feb26 2012

8/2/2019 VMS5 Optimization Weekly Report Feb26 2012

1/18

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

Feb 26, 2012

VMS5 Optimization Report


2/18


3/18

HISILICON SEMICONDUCTOR

HUAWEI TECHNOLOGIES CO., LTD. Page 3

Key Optimization Target and Result

3

Decrease customer com2

Improve the coverage

1Improvenetwork KPI

Network Quality Improvement

Call center had a little coThe VIP subscriber comp

4Improve through

Use two carrier wCS and PS

After new site on air, RSCP increase, but EcIodecrease especially in the dense area

Handover suc Rate increase,handover request times decrease


4/18

HISILICON SEMICONDUCTOR

HUAWEI TECHNOLOGIES CO., LTD. Page 4

Optimization structure

VIP Assurance

User Complaint Handling

Problems &Demands

Operation &Maintenance

Tools &Platform

Decrease customercomplaint andhandle in time

Core NetworkOptimization

NetworkPerformance

Monitoring PlatformPRS iManager MService QualityEvaluation Tool set

Troubleshooting& Optimization

3G 2G inter operationperformance, let useras long as 3G is avail

RNO: TopN bad cell Opt, TopN user failure, 2G-3G inter-operation, Call Drop, Downloa

Ensure the quality for newsite, swap site, expansion siteand reuse site

TOP worst Celltroubleshooting

Result Evaluation & Assessment

Top worstexperience userhanding

Wireless NetworkOptimization


5/18

HISILICON SEMICONDUCTORHUAWEI TECHNOLOGIES CO., LTD. Page 5

Content

Optimization Work Summary

Optimization Target and Result

Pending issue

Optimization content, plan and support


6/18



3G to 2G handover:

CS inter-RAT handover successful ratio is about 98.5%

PS inter-RAT handover successful ratio increased, around 95.2%

Action to improve PS handover successful ratio:

1- Changed the 2G target threshold from 20 to 25

2- Troubleshooting for top N worst cell, rechecked and configured the inter-RAT neighbor and parameters

Plan to improve PS handover successful ratio:

1- Continue to troubleshooting worst cell

2- Adjust the HO threshold to reduce to HO times, but not decrease performance


7/18



Complaint troubleshooting:

Quay 153 Cho Sat Pham Hung Thoi HBSignal is not so good although there is one site nearby, as it

is too deep in the building

Solution:1- check and adjust the site HPG_LCN_CHO_SAT direct to thebuilding, but it is still not so good

2- adjust HPG_HBG_NGUYEN_THAI_HOC_1800, as 900cover import area, so only 1800 can be adjustedPlan to finish: Feb28


8/18




145 PhCm Gia Vin NQFast connection speed is low, 3G signal is

weak, camp on 2G most time

Solution:1- lock 3G only, data throughput is higher,but 3G signal still low

2- two new 3G site nearby are not on air,will check again after the two sites on air


9/18




869 Trng Chinh K.AnWeak indoor coverage

Solution:1- increase the transmit power of sitearound

2- adjust the HPG_KAN_QUAN_TRU_A tiltfrom 9 to 6

Result:Signal improved, but still weak in deepinside, mainly because of the distance, thenearest site is 630m


10/18



Subscriber complaint:

Totally checked 10 customer complaint area, 8 of them is about the weak coverage, the reason is that

the area far is from the site

Bad performance in two cell of HPG_HBG_THUONG_LY

After upgrade to double carrier, the performance is bad in second carrier, but no alarm, last week HQ

analyzed the log and found the problem caused by the fault WBBP, replaced the board, the

performance become normal


11/18


Content

Joint Team Optimization Work Summary


Pending issue


P di i


12/18


Pending issue

Weak coverage indoor in some area

HW will try to adjust the nearest site to improve, but may not improve so much

Coverage improve after new sites on airAfter most of the new sites on air, HW will start the cluster optimization

Bad coverage indoor, Quay 153 Cho Sat Pham Hung Thoi HB

Adjust the nearest G1800 to the area, and check result after adjust

Drop complaint in Cty CPTM Phu My Hung Cum CN Vinh NiemNo alarm in the serving cell, will check the call drop record and trace the subscriber Number to find the solve the pro

PS inter-RAT performance improvement

Decrease the HO times, and optimization for old system


13/18


Content

Joint Team Optimization Work Summary


Pending issue



14/18


Optimization Content

1. Coverage optimization (plan)As many new sites on air, so need decrease the old sites coverage to avoid too much interference, wbad EcIo, good RSCPSolution: after most of the new site on air, HW will start the cluster optimization with cluster driving tes

2. Cell with high RTWP (plan)It may cause unbalance between uplink and downlink;Solution: The best solution is to find and clear the interference, but it is very difficult;If the interference can not solve in short time, the suggestion is decrease the cell downlink coverage aavoid the situation good signal but bad quality

3. Neighbor optimization (troubleshooting)Bad the top worst cell to check neighborOptimize the missing neighbor base on CHR logfile

4. Top worst cell optimization (daily)Base one KPI statistics to troubleshooting for top worst cell


15/18


Optimization content

5. Check user performance with CHR logfile (troubleshooting)Discover the top worst performance user in advance and solve the problem

6. VIP user performance guarantee (daily)

Get the call failure or drop record from CHR, to find and solve problem if any in time

7. Alarm and transmission which affect service (daily)Base the performance to find and solve the problem in time,

8. Monitor both CN and SRAN performance (daily)Monitor both CN and SRAN performance, as some kind of failure can not be found in SRAN, such as reject failure


16/18


Optimization Plan for next week1. Start optimization for HDGAs most site is ready in HDG, we will prepare the optimization for HDG, and discuss with VMS5 togethoptimization:

Confirm the parameter setting, DT plan and route, optimization schedule and target

2. Improve coverage in Quay 153 Cho Sat Pham Hung Thoi HBAdjust the nearest site HPG_HBG_NGUYEN_THAI_HOC_1800, and recheck the result

3. 3G to 2G handover performance improvementCurrently the inter-RAT performance increase a little, but still not catch the target, choose the worst ceanalysis the failure cause


17/18


Support and help

Weak indoor coverage, need on air new site ASAP

Many complains these days, and most of them is about weak coverage, especially indoor

Solution: On air the new site or expansion site ASAP (lack of transmission currently)

Many new site still not yet no air as transmission not ready or special antenna not ready Add new site for the area with high traffic but no site nearby

Some area high traffic, but no site nearby, need add new site (repeater can be the temporary solution, but iinterference and difficult to do troubleshooting later)

ActualrequirementTarget Configuration Current 2G/3G Current 3G equipment

Total Target Number Current BTS3900 BTS3900A DBS3900

418

266GSM/DCS/

UMTS

81 GSM 0 0 0

17 DCS 0 0 0

8 GSM/DCS 0 0 0

2 UMTS 2 0 0

99 GSM/UMTS 2 0 97

16 DCS/UMTS 7 3 6

45 GSM/DCS/UMTS 8 0 37

152GSM/UMT

S

2 UMTS 2

61 GSM 0 0 0

89 GSM/UMTS 68 8 13


18/18


Thank You

VMS5 Optimization Weekly Report Feb26 2012

Documents

Transcript of VMS5 Optimization Weekly Report Feb26 2012