Umts Kpi
- 1. 0 Introduction to UMTS Radio KPI 3G network planning introduce www.huawei.com Huawei Northwest Africa Region RNP Solution Manage: William.chen William.chen@huawei.com HUAWEI TECHNOLOGIES CO., LTD. PDF created with pdfFactory Pro trial version www.pdffactory.com
- 2. Agenda UMTS Radio KPI overview 3G Network Optimization Case Study of KPI Optimization HUAWEI TECHNOLOGIES CO., LTD. Page 2 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 3. 3G KPIs Principle: S.M.A.R.T the KPI has clear and complete definition and S pecific formula, include check point and procedure. KPIs are measurable by given condition, M easurable measurement equipment and procedure. all the KPIs should be reachable, it is refer to the A ttainable commercial network. R elevant the KPI can show the subscriber experience T ime-bound the KPI target should be on the base of time-bound HUAWEI TECHNOLOGIES CO., LTD. Page 3 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 4. 3G KPIs : Specific Complete KPI definition include the formula combine with the check point or procedure . The example: RRC Connection Successful Rate formula RRCConnect ionSuccess service RRCS_SR = ×100% Service RRCConnect ionAttempt service Check point The number of “ RRC Connection Attempt ” is A1 or A2 ? A2 represent the effective number of “ RRC Connection Attempt ”. HUAWEI TECHNOLOGIES CO., LTD. Page 4 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 5. 3G KPIs : Measurable - Drive Test Driver test route is based on Field Test - > Drive Test cluster, it is involved about 20 Evaluate the overall network sites in one cluster usually. performance, usually on the network pre-launch phase and initial stage of commercial launch. Test platform Multiple test model UEs can perform different tests. Data analysis Probe & Assistant is used for analyzing test data HUAWEI TECHNOLOGIES CO., LTD. Page 5 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 6. 3G KPIs : Measurable - Stationary test System KPI is suggested to be Field Test -> stationary Test test by stationary: Evaluate the system / equipment performance. Throughput KPI Delay KPI Quality KPI Core Network Stationary test condition is fixed, NodeB and usually used in indoor test scenario . RNC NodeB Radio Network KPI test is suggested to be test by drive test System performance Radio Network performance Call drop rate Equipment ability Handover successful rate Radio network Transmission planning Network construct Special environment … . condition HUAWEI TECHNOLOGIES CO., LTD. Page 6 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 7. 3G KPIs : Measurable - Statistic test Statistic Test Nastar server Monitoring & analysis center Recommended for security Essential Optimization team OM system Pre-Condition for Statistic Test Subscriber care center There must be enough statistic sample, that Terminal: ordinary PC or laptop, no distance mean network traffic should be reach high limitation level. Local networks Any corresponding dept. HUAWEI TECHNOLOGIES CO., LTD. Page 7 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 8. Huawei KPI test platform comprehensive analysis of the iManagerTM M2000 performance, configuration, alarm obtaining test data GENEX Nastar 3G sharing of analysis results Node B RNC GENEX Probe GENEX Assistant AGILENT 3G Node B QUALCOMM HLR/AC multiple test data HUAWEI RNC Node B RNS PSTN GENEX Probe MSC/SSP/ PLMN WCDMA wireless test data ISDN VLR Node B RNC GMSC/SSP CN GENEX U- Node B Net Node B RNS network pre-planning/planning HUAWEI TECHNOLOGIES CO., LTD. Page 8 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 9. 3G KPIs: Relevant Examples of User Experience (QoE) completion of a End-to-end response The voice and video download file is fast is Clare Voice, Video Phone, MMS, WAP, Email, FTP, HTTP… Service Performance Radio Network KPI AMR12.2, CS64k,PS64k/128k/384k, HSDPA/HSUPA Accessibility Retainability Integrity Mobility Utilization Availability Statistic / Measurement data HUAWEI TECHNOLOGIES CO., LTD. Page 9 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 10. Huawei 3G KPIs Architecture 3G KPIs Accessability Retainability Service Integrity Mobility Delay/Latency Availability • Call Setup • Call Drop • PS Throughput • SHO • Call Setup Delay • Worst Cell Success Rate Rate Success (Voice/VP) Rate (Voice/VP) (Voice/VP) Rate • PDP Context • PDP Context • PDP • Hard Activation Time Activation Context Handover • RTT Success Rate Drop Rate Success Rate • SMS/MMS Success Rate • Inter-RAT Handover Success Rate HUAWEI TECHNOLOGIES CO., LTD. Page 10 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 11. 3G KPIs: It is not only a value 3G KPI is not only a value , but a system, for example of CDR (Call Drop Rate) Network Planning Network Construct Transmission optimization Root cause drop-call cause 59.45% 10.02% 7.29% 4.56% 0.68% 0.68% 3% 2.28% 11.94% HUAWEI TECHNOLOGIES CO., LTD. Page 11 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 12. 3G KPIs: Attainable 3G KPI is output of combination with investment include technology, HR, cost, competition strategy etc. Cost Huawei KPI comply principle: Huawei will be responsibility for every complied KPI; le Cooperate with Mobilis to work out a Competitive KPI; t Use the experience from other commercial network; Technical AttainableC ommon target for Mobilis and Huawei HUAWEI TECHNOLOGIES CO., LTD. Page 12 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 13. 3G KPIs: Time-bound Mature Network 10 90 80 Drive Test KPIs 70 60 50 Ongoing Optimization 40 30 Stationary test KPIs 20 10 Number of Sites Number of Sites Network Statistics Network Statistics Commercial Launch Benchmark test Nastar Probe & Assistant Probe & Assistant Pre-Launch Probe & Assistant KPI Acceptance Drive Test KPIs Stationary test KPIs Network construct Site verification HUAWEI TECHNOLOGIES CO., LTD. Page 13 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 14. Recommend test methodology Test Methodology Pre-launch Acceptance On-going Optimization RRC connection success rate Drive Test - Call setup success rate Drive Test Statistic Test PDP activation success rate Drive Test Statistic Test CS Call drop rate Drive Test Statistic Test PS Call drop rate Drive Test Statistic Test CS Call complete rate - Statistic Test PS Call Complete rate - Statistic Test HSPA Call drop rate Stationary Stationary R99 PS Throughput Stationary Stationary HSPA Throughput Stationary Stationary Soft handover success rate Drive Test Statistic Test Inter-RAT handover success Drive Test Statistic Test rate HUAWEI TECHNOLOGIES CO., LTD. Page 14 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 15. Contents • UMTS Radio KPI overview •3 G Radio Network Optimization • Case Study of KPI Optimization HUAWEI TECHNOLOGIES CO., LTD. Page 15 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 16. Optimization throughout Life Cycle • RF adjustment Drop call • Para. adjustment Congestion • Maintenance and upgrade Poor quality • Contingency planning Access failure • Network expansion Pre-launch optimization …… • …… . Customized and differentiated services Single site verification Billing strategies Return Investment RF plan review DT & CQT KPI Complaints analysis Construction Booming phase Mature phase Time Commercia phase Optimizing Balancing l launch Troubleshooting HUAWEI TECHNOLOGIES CO., LTD. Page 16 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 17. Network Optimization Phases Optimization preparation RF optimization Service test and New site integrated parameter optimization Routine drive test and stats. analysis Single site verification Acceptance criteria N satisfied? Y 80 ％ sites in the Y N cluster ready? Acceptance HUAWEI TECHNOLOGIES CO., LTD. Page 17 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 18. RF Optimization Target To optimize coverage To minimize pilot pollution To optimize cell dominance To optimize neighbor cell list To resolve RF-related drop calls HUAWEI TECHNOLOGIES CO., LTD. Page 18 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 19. RF Parameters Optimization Engineering parameters adjustment To adjust antenna down tilt To adjust antenna azimuth To adjust antenna location To adjust antenna height To replace antenna To replace site To add new cell Radio part parameters adjustment To optimize neighbor cell list HUAWEI TECHNOLOGIES CO., LTD. Page 19 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 20. Pilot Pollution Minimization Pilot pollution definition: Pilot pollution will result in: SHO candidates (A) (1) low signal quality Active set size (B) (2) decreased system If A>B, pilot pollution exists capacity (3) Call drops easier -60 -65 Margin -70 Ways to optimize: (1) Antenna adjustment -75 -62 -64 -66 (e.g. azimuth or down tilt) -68 -69 -80 (2) Pilot power optimization -85 -81 -90 SC1 SC2 SC3 SC4 SC5 SC6 Not Active Set Pilot Pollution Pilot Pollution HUAWEI TECHNOLOGIES CO., LTD. Page 20 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 21. Pilot Pollution: Example HUAWEI TECHNOLOGIES CO., LTD. Page 21 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 22. RF-related Drop Calls Problems Appearance Poor coverage Poor RSCP & Ec/Io High interference Poor Ec/Io or RTWP Poor UL coverage UE max Tx power Poor dominance many SHO events Pilot pollution many cells present Missing neighbors Fast change of RF conditions usually causes drop calls, e.g. turning a corner. HUAWEI TECHNOLOGIES CO., LTD. Page 22 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 23. Para. Optimization Target Para. optimization To reduce access failures is an important step after RF optimization To reduce drop calls To enhance service quality Service quality and network resources utilization will be improved after para. optimization HUAWEI TECHNOLOGIES CO., LTD. Page 23 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 24. Parameters to be Optimized CCCH power allocation para. RL maximum power para. Seldom adjusted Cell re-selection para. Intra-freq. handover para. An effective way to Inter-RAT handover para. reduce drop calls Power control para. Access power para. The influence caused by the cell parameters adjustment Other related para. should be analyzed carefully. HUAWEI TECHNOLOGIES CO., LTD. Page 24 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 25. Intra-freq. Re-selection Para. Optimize Treselection , Qhysts and Sintrasearch so as to have minimum ping-pong and minimum camped onto wrong cell The black dotted line Qhyst2 CPICH_Ec/Io is the serving cells. CPICH_Ec/Io Qhyst2 Qhyst2 Qhyst2 Qhyst2 The black dotted line UE doesn’t camp is the serving cells. onto the best cells. Sintrasearch UE doesn’t camp onto the best cells. Qqualmin Qqualmin Treselection Treselection Treselection Treselection Treselection Treselection Time Treselection, Qhyst2, Sintrasearch = 0 Treselection, Qhyst2, Sintrasearch != 0 HUAWEI TECHNOLOGIES CO., LTD. Page 25 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 26. Contents • UMTS Radio KPI overview •3 G Radio Network Optimization • Case Study of KPI Optimization HUAWEI TECHNOLOGIES CO., LTD. Page 26 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 27. Case study from commercial projects • Example of Accessibility KPI analysis • Example of Call Drop KPI issue & solution • Example of Throughput KPI issue analysis HUAWEI TECHNOLOGIES CO., LTD. Page 27 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 28. Example of accessibility KPIs issue Trouble-shooting of RRC setup and RAB assignment Breakdown of CS RAB failure (Counters) problems: VS.RAB.FailEstCS.I VS.RAB.FailEstabCS. VS.RAB.FailEstPS. • STEP1 : Identify the counter with the UB.Band Other.Cell RIPFail highest number • STEP2: Identify the Top 10 cells with Breakdown of CS RRC failure (Counters) the same problem VS.RRC.Rej.R VS.RRC.Rej.Cod VS.RRC.Rej.UL.C RRC.FailConnEstab. Definition of Counters L.Fail e.Cong E.Cong NoReply VS.RAB.FailEstPs.IUB.Band : The number of RABs unsuccessfully established in a cell due to IUB resource congestion causes. • VS.RAB.FailEstabCS.Other.Cell : • VS.RRC.Rej.UL.CE.Cong : RRC Pre-admission control module reports setup failure due to lack of UL CE a resource congestion. resources HUAWEI TECHNOLOGIES CO., LTD. Page 28 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 29. Analysis The “worst” sites (cells) that have been found to have both IUB and CE congestion issues: 0109TO (cell id 578/579/580) 0111TO (3882/3883/3884) 0070TO (18641/18642/18643) NodeB UL CE Occupation Rate Name 2007-02-19 2007-02-20 2007-02-21 2007-02-22 0070TO 120.83% 132.29% 132.29% 171.88% 0109TO 142.71% 175.00% 175.00% 180.21% 0111TO 158.33% 132.29% 132.29% 148.96% HUAWEI TECHNOLOGIES CO., LTD. Page 29 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 30. Suggested solution A comparative analysis shows that, if excluding the problematic sites, the KPI would improve substantially, say, AMR RAB assignment success rate from 97.79% to 98.09%: KPIs (including IUB KPIs (without IUB Congestion sites) Congestion sites) RRC Connection Setup Success 99.17%(313992/316615) 99.35%(256449/258126) Rate (CS)(>98%) AMR RAB Assignment Success Suggested action plan: 97.79%(294499/301169) 98.09%(241127/245815) Rate(>98%) • CE/IUB expansion Video Call RAB Assignment 98.31%(3314/3371) 98.67%(2891/2930) • Perform regular neighbour list Success Rate(>98%) check to further tune the PS64 RAB Assignment Success performance 84.93%(2462/2899) 83.10%(1981/2384) Rate(>97%) PS128 RAB Assignment 98.48%(16674/16932) 98.80%(13638/13803) Success Rate(>97%) PS384 RAB Assignment 97.53%(58114/59584) 97.81%(48854/49946) Success Rate(>97%) HUAWEI TECHNOLOGIES CO., LTD. Page 30 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 31. Case study from commercial projects • Example of Accessibility KPI analysis • Example of Call Drop KPI issue & solution • Example of Throughput KPI issue analysis HUAWEI TECHNOLOGIES CO., LTD. Page 31 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 32. Example of Call drop rate issues Drop Call Rate Voice(3G) Drop Call Rate Video(3G) AMR12.2 Call Drop Rate Drop Call Rate (2G) 3.5% Voice call drop rate 3.0% 2.5% changes over a three- 2.0% month optimization 1.5% period 1.0% 0.5% 0.0% Zone1 Zone2 Solving Voice call drop Zone3 rate problems in Top 3 zones HUAWEI TECHNOLOGIES CO., LTD. Page 32 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 33. What measures were taken to solve the call drop problems? Zone Action time Call drop rate Optimization measures reduction Zone 1 Feb. 14-17 1.57%->1.27% Scrambling code planning adjustment System/handover Zone 2 Feb. 23-25 1.38%->1.21% parameter tuning Neighbour list optimization RF optimization, etc. Zone 3 Mar.2-6 1.34%->1.10% HUAWEI TECHNOLOGIES CO., LTD. Page 33 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 34. Case study from commercial projects • Example of Accessibility KPI analysis • Example of Call Drop KPI issue & solution • Example of Throughput issue analysis HUAWEI TECHNOLOGIES CO., LTD. Page 34 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 36. Analysis: coverage problems RNC 123 RNC 122 Areas that lack dominant pilot Drive test route involves 3 Huawei RNCs and 1 Nortel RNC RNC 121 HUAWEI TECHNOLOGIES CO., LTD. Page 36 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 37. The impact of missing neighbours • DL R99 throughput has been impacted by the interference generated by missing neighbors, mostly concerning the new sites that had been recently put on air • Areas with low throughput corresponds to bad Ec/Io figures and HHO to 2G Low throughput UE handover to GSM HUAWEI TECHNOLOGIES CO., LTD. Page 37 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 38. Other causes In addition to coverage and missing neighbour causes, the HSDPA minimum throughput problem is due to: • DT route crosses the IUR area where HSDPA calls are reconfigured to DCH (H2D) • UE moves from a non-hotspot to a hotspot site in HSDPA connected mode RNC 122 RNC 123 RNC 122 RNC 123 RNC 121 RNC 121 HUAWEI TECHNOLOGIES CO., LTD. Page 38 PDF created with pdfFactory Pro trial version www.pdffactory.com
- 39. 0 Thank You www.huawei.com PDF created with pdfFactory Pro trial version www.pdffactory.com