TD-LTE指標分析及工具介紹

1、COPYRIGHT 2012 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. TD-LTE指標分指標分析及析及工具介紹工具介紹COPYRIGHT 2012 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. 2目錄目錄p指標分析方法l KPI指標體系l 接入性指標l 保持性指標l 移動性指標l 完整性指標l 容量指標l 接入時延pNPO工具介紹3COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. KPI 指標體系

2、指標體系 RRC 連接成功率 ERAB建立成功率 無線接通率 無線掉線率 ERAB掉線率 切換成功率 ENB間切換成功率 ENB內切換成功率 上/下行BLER 上/下行丟包率 上/下行棄包率 PRB利用率 同時在線用戶數(shù) 平均RSRP 弱覆蓋小區(qū)占比 接入時延 上下行吞吐率 重疊覆蓋度 過高基站比4COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. RRC連接建立成功率接入性接入性RRC連接建立請求ERAB建立成功RRC連接建立完成ERAB建立請求UEENBMME無線接通率RRC連接建立成功率* E-RAB建立成功

3、率RRC連接建立成功次數(shù)/ RRC連接建立請求次數(shù)E-RAB建立成功率E-RAB建立成功數(shù)/E-RAB建立請求數(shù)監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器RRC連接建立成功數(shù)RRC.ConnEstabSucc.SumVS_RRC_cnx_succRRC連接建立請求數(shù)6種接入類型請求之和VS_RRC_cnx_req初始UE上下文ERAB連接建立成功數(shù)SAEB.EstabInitSuccNbr+SAEB.EstabAddSuccNbr + VS.IncomingERABSetupOnIntraLteHO(all screening)VS_ERABs_all_initial_setup_succ + V

4、S_ERABs_all_add_setup_succ初始UE上下文ERAB連接建立請求數(shù)SAEB.EstabInitAttNbr+SAEB.EstabAddAttNbr+VS.IncomingERABToBeSetupOnIntraLteHOVS_ERABs_all_initial_setup_req + VS_ERABs_all_add_setup_req5COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. RRC連接失敗原因分析連接失敗原因分析失敗原因失敗子原因監(jiān)控指標3GPP定義的計數(shù)器參考指標設備操作RRC

5、連接建立失敗率（操作原因） RRC connection failure.InterventionOAM告警信息設備故障S1接口故障RRC連接建立失敗率（S1接口故障）RRC connection failure.S1FaultExternalFailure告警信息故障RRC連接建立失敗率（未收到UE響應）RRC connection failure.NoResponseFromUE告警信息網絡容量達到最大接入用戶數(shù)RRC連接建立失敗率(達到最大接入用戶數(shù))RRC connection failure.CACFailureMME過載RRC連接建立失敗率（MME過載）RRC connection

6、 failure.MoDataRRC connection failure.MoDataMoSignallingRRC connection failure.NonEmergencyNonMtAccess告警信息無線環(huán)境問題RRC連接建立失敗率（未收到UE響應）RRC connection failure.NoResponseFromUE路測覆蓋/MR RSRP弱覆蓋小區(qū)終端問題RRC連接建立失敗率（未收到UE響應）RRC connection failure.NoResponseFromUE信令采集/基于終端性能統(tǒng)計的工具如PCMD6COPYRIGHT 2011 ALCATEL-LUCENT

7、 SHANGHAI BELL. ALL RIGHTS RESERVED. RRC連接失敗連接失敗案案例分析例分析后宰門2小區(qū)某日RRC建立成功率突然惡化，導致終端難以接入，失敗全部是VS_RRC_cnx_fail_S1FaultExternalFail counter計數(shù)：查看該時段告警發(fā)現(xiàn)存在IK4009021以及IK4007056告警，IK4009021為S1故障告警，IK4007056為由于S1故障導致小區(qū)禁止接入告警。因此該基站S1閃斷造成該時段RRC連接建立成功率低，經搶修，該小區(qū)RRC連接建立成功率隨S1連接恢復而自動恢復。7COPYRIGHT 2011 ALCATEL-LUCEN

8、T SHANGHAI BELL. ALL RIGHTS RESERVED. ERAB建立失敗原因分析建立失敗原因分析原因分類監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器容量ERAB建立失?。ㄟ_到enodeB ERAB最大接入數(shù)）VS.ERABSetupFailed.CACFailureVS_ERABs_proc_setup_fail_CACERAB建立失?。‥RAB context分配失?。￢S.ERABSetupFailed.ERABContextAllocationFailureVS_ERABs_proc_setup_fail_ERABCtxtAllocation基站故障ERAB建立失?。▋炔抗?/p>

9、障） VS.ERABSetupFailed.InternalFailureVS_ERABs_proc_setup_fail_InternalFail無線問題ERAB建立失?。≧RC重建） VS.ERABSetupFailed.RRCConnectionReestablishmentVS_ERABs_proc_setup_fail_reestabERAB建立失?。ǔ瑫r）VS.ERABSetupFailed.TimeoutVS_ERABs_proc_setup_fail_TimeoutUE其它ERAB建立失?。ㄅc其它流程交互）VS.ERABSetupFailed.Interaction-WithO

10、therProcedureVS_ERABs_proc_setup_fail_InteractionWithOtherProcedure8COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. 保持性保持性無線掉線率異常請求釋放上下文數(shù)/初始上下文建立成功次數(shù)*100%ERAB 掉線率E-RAB異常釋放數(shù)量/E-RAB成功建立次數(shù)*100%監(jiān)控指標監(jiān)控指標ALUALU計數(shù)器計數(shù)器 掉話次數(shù)VS.UEContextReleaseRequestSum -(VS.UEContextReleaseRequest.UserInac

11、tivity+ VS.UEContextReleaseRequest.InterRATRedirection+ VS.UEContextReleaseRequest.InterFreqRedirection+ VS.UEContextReleaseRequest.CsFallbackTo1xRTT)初始上下文建立成功次數(shù)VS_UE_ctxt_setup_succ9COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. 無線掉話原因分析無線掉話原因分析失敗原因 失敗子原因 監(jiān)控指標 3GPP定義的計數(shù)器 參考指標 設備故

12、障 故障 UE上下文釋放請求（無線鏈路故障） VS.UEContextReleaseRequest.RadioLinkFailure 告警信息 UE上下文釋放請求（內部故障） VS.UEContextReleaseRequest.InternalFailure 告警信息 UE上下文釋放請求（ENB重啟S1） VS.LocalUEContextRelease.S1APResetENodeB 告警信息 MME故障 UE上下文釋放請求（MME重啟S1） VS.LocalUEContextRelease.S1APResetMME 告警信息 UE上下文釋放請求（S1故障） VS.LocalUEConte

13、xtRelease.S1FaultExternalFailure 告警信息 容量受限 UE上下文釋放請求（擁塞） VS.UEContextReleaseRequest.Congestion PRB利用率/吞吐率/RAB擁塞率 無線環(huán)境問題 UE上下文釋放請求（無線鏈路故障） VS.UEContextReleaseRequest.RadioLinkFailure 路測覆蓋/MR RSRP弱覆蓋小區(qū) 終端故障 UE上下文釋放請求（RRC完整性保護失敗） VS.UEContextReleaseRequest.IntegrityFailure 信令采集/基于終端性能統(tǒng)計的工具如PCMD 10COPYR

14、IGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. 移動類移動類切換類型切換過程測量切換準備切換執(zhí)行測量階段：UE根據(jù)下發(fā)的測量配置消息進行相關測量，并將測量上報給ENB準備階段：根據(jù)UE上報的測量結果進行評估，準備切換資源，最終決定是否觸發(fā)切換執(zhí)行階段：ENB根據(jù)切換準備結果，控制UE切換到目標小區(qū)，由UE完成切換11COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. ENB間間S1切換成功率切換成功率(1)指標定義ENB間S1切換出成功次數(shù)/

15、 ENB間S1切換出請求次數(shù)切換出準備成功率與失敗原因監(jiān)控指標3GPP定義計數(shù)器ENB間S1切出準備成功數(shù)VS.OutgoingInterS1HOPreparationSuccessENB間S1切出請求數(shù)VS.OutgoingInterS1HOAttempt原因分類監(jiān)控指標3GPP定義計數(shù)器目標無資源ENB間S1切出失?。ㄇ袚Q準備失敗）VS.OutgoingInterS1HOFailure.HOPreparationFailureS1鏈路故障ENB間S1切出失?。ǔ瑫r無響應）VS.OutgoingInterS1HOFailure.TS1RelocPrepForS1HOTimeout監(jiān)控指標3G

16、PP定義計數(shù)器ENB間S1切入準備成功數(shù)VS.IncomingInterS1HOPreparationSuccessENB間S1切入請求數(shù)VS.IncomingInterS1HOAttempt切換入準備成功率與失敗原因12COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. ENB間間S1切換成功率切換成功率(2)切換出執(zhí)行成功率與失敗原因監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器ENB間S1切出成功數(shù)VS.OutgoingInterS1HOSuccessVS_HO_IrC_S1_succ_srcENB間S1切出準備成功

17、數(shù)VS.OutgoingInterS1HOPreparationSuccessVS_HO_IrC_S1_succ_prep_src監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器切出失?。ㄔ谠^(qū)重建RRC連接）VS.OutgoingInterS1HOFailure.RRCConnectionReestablishmentOnSourceCellVS_HO_IrC_S1_fail_exec_ReestabOnSrc_src_OD切出失?。ㄓ嫊r器TS1RelocOverallForS1Handover超時）VS.OutgoingInterS1HOFailure.TS1RelocOverallForS1HO

18、TimeoutVS_HO_IrC_S1_fail_exec_TimeoutS1_src_OD切出失敗（在其他小區(qū)重建RRC連接）VS.OutgoingInterS1HOFailure.RRCConnectionReestablishmentOnOtherCellVS_HO_IrC_S1_fail_exec_ReestabOnOther_src_OD切換入執(zhí)行成功率與失敗原因監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器ENB間S1切入成功數(shù)VS.IncomingInterS1HOSuccessVS_HO_IrC_S1_succ_tgtENB間S1切入準備成功數(shù)VS.IncomingInterS1HOP

19、reparationSuccessVS_HO_IrC_S1_succ_prep_tgt原因分類監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器無線原因切入失?。ㄔ谀繕讼缕渌^(qū)重建RRC連接）VS.IncomingInterS1HOFailure.RRCConnectionReestablishmentOnOtherCellVS_HO_IrC_S1_fail_exec_ReestabOnOther_tgt_OD切入失?。ㄔ谀繕讼虑腥胄^(qū)重建RRC連接）VS.IncomingInterS1HOFailure.RRCConnectionReestablishmentOnTargetCellVS_HO_IrC

20、_S1_fail_exec_ReestabOnTgt_tgt_OD切入失敗（計時器InterS1HO timeout超時）VS.IncomingInterS1HOFailure.InterS1HOTimeoutVS_HO_IrC_S1_fail_exec_TimeoutS1orUE_tgt_OD終端問題切入失?。ㄍ暾运惴炞C失敗）VS.IncomingInterS1HOFailure.IntegrityFailureVS_HO_IrC_S1_fail_exec_integrity_tgt_OD13COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL

21、 RIGHTS RESERVED. ENB間間X2切換成功率（切換成功率（1）指標定義ENB間X2切換出成功次數(shù)/ ENB間X2切換出請求次數(shù)切換出準備成功率與失敗原因監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器ENB間X2切出準備成功數(shù)VS.OutgoingInterX2HOPreparationSuccessVS_HO_IrC_X2_succ_prep_srcENB間X2切出請求數(shù)VS.OutgoingInterX2HOAttemptVS_HO_IrC_X2_req_src監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器ENB間X2切出失?。ㄇ袚Q準備失?。￢S.OutgoingInterX2HOFailu

22、re.HOPreparationFailureOtherVS_HO_IrC_X2_fail_prep_HOPrepFailRcvd_src_ODENB間X2切出失?。ǔ瑫r無響應）VS.OutgoingInterX2HOFailure.X2PreparationTimeoutVS_HO_IrC_X2_fail_prep_TimeoutX2_src_OD切換入準備成功率與失敗原因監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器ENB間X2切入準備成功數(shù)VS.OutgoingInterX2HOPreparationSuccessVS_HO_IrC_X2_succ_prep_srcENB間X2切入請求數(shù)VS.O

23、utgoingInterX2HOAttemptVS_HO_IrC_X2_req_src原因分類原因子類監(jiān)控指標3GPP定義計數(shù)器設備操作ENB間X2切入失?。ú僮鳎￢S.IncomingInterX2HOFailure.InterventionOAM加密算法不匹配ENB間X2切入失?。用芩惴ú黄ヅ洌￢S.IncomingInterX2HOFailure.SecurityAlgoNotCompatible容量受限接入受限ENB間X2切入失敗（CAC接入失?。￢S.IncomingInterX2HOFailure.CACFailure過載ENB間X2切入失?。ㄟ^載）VS.IncomingInte

24、rX2HOFailure.OverloadConditionFailure設備故障小區(qū)退服ENB間X2切入失?。ㄐ^(qū)退服）VS.IncomingInterX2HOFailure.CellNotAvailableERAB分配失敗ENB間X2切入失敗（ERAB分配失?。￢S.IncomingInterX2HOFailure.ERABContextAllocationFailure內部故障ENB間X2切入失?。▋炔抗收希￢S.IncomingInterX2HOFailure.InternalFailureS1故障ENB間X2切入失?。⊿1故障）VS.IncomingInterX2HOFailure.

25、S1FaultExternalFailure14COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. ENB間間X2切換成功率切換成功率(2)切換出執(zhí)行成功率與失敗原因切換入執(zhí)行成功率與失敗原因監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器ENB間X2切出成功數(shù)VS.OutgoingInterX2HOSuccessVS_HO_IrC_X2_succ_srcENB間X2切出準備成功數(shù)VS.OutgoingInterX2HOPreparationSuccessVS_HO_IrC_X2_succ_prep_src原因分類監(jiān)控指標3

26、GPP定義計數(shù)器ALU計數(shù)器無線原因ENB間X2切出失?。ㄔ谠^(qū)重建RRC連接）VS.OutgoingInterX2HOFailure.RRCConnectionReestablishmentOnSourceCellVS_HO_IrC_X2_fail_exec_ReestabOnSrc_src_ODENB間X2切出失?。ㄓ嫊r器超時）VS.OutgoingInterX2HOFailure.X2ReleaseTimeoutVS_HO_IrC_X2_fail_exec_TimeoutX2_src_ODENB間X2切出失敗（在原下其他小區(qū)重建RRC連接）VS.OutgoingInterX2HOFai

27、lure.RRCConnectionReestablishmentOnOtherCelVS_HO_IrC_X2_fail_exec_ReestabOnOther_src_OD監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器ENB間X2切入成功數(shù)VS.IncomingInterX2HOSuccessVS_HO_IrC_X2_succ_tgtENB間X2切入準備成功數(shù)VS.OutgoingInterX2HOPreparationSuccessVS_HO_IrC_X2_succ_prep_src原因分類監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器無線原因ENB間X2切入失?。ㄔ谀繕讼缕渌^(qū)重建RRC連接）VS.I

28、ncomingInterX2HOFailure.RRCConnectionReestablishmentOnOtherCellVS_HO_IrC_X2_fail_exec_ReestabOnOther_tgt_ODENB間X2切入失?。ㄔ谀繕讼虑腥胄^(qū)重建RRC連接）VS.IncomingInterX2HOFailure.RRCConnectionReestablishmentOnTargetCellVS_HO_IrC_X2_fail_exec_ReestabOnTgt_tgt_ODENB間X2切入失?。ㄓ嫊r器InterS1HO timeout超時）VS.IncomingInterX2HOFa

29、ilure.InterHOTimeoutVS_HO_IrC_X2_fail_exec_TimeoutX2orUE_tgt_ODS1鏈路故障ENB間X2切入失?。酚山粨Q失?。￢S.IncomingInterX2HOFailure.PathSwitchFailureVS_HO_IrC_X2_fail_exec_PathSwitchFail_tgt_ODENB間X2切入失?。酚山粨Q超時）VS.IncomingInterX2HOFailure.S1PathSwitchTimeoutVS_HO_IrC_X2_fail_exec_TimeoutS1PathSwitch_tgt_OD終端問題ENB間X2

30、切入失?。ㄍ暾运惴炞C失敗）VS.IncomingInterX2HOFailure.IntegrityFailureVS_HO_IrC_X2_fail_exec_integrity_tgt_OD15COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. ENB內切換成功率（內切換成功率（1）指標定義ENB內切換出成功次數(shù)/內切換出請求次數(shù)切換出準備成功率與失敗原因監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器ENB內切出準備成功數(shù)HO.IntraOutAtt.SumVS_HO_IrC_succ_prep_srcENB內切出請

31、求數(shù)VS.OutgoingIntraHOAttemptVS_HO_IrC_req_src原因分類監(jiān)控指標3GPP定義計數(shù)器目標小區(qū)接入受限ENB內切出準備失?。ń尤胧芟蓿￢S.IntraHOFailure.CACFailure目標小區(qū)無資源ENB內切出準備失敗（過載）VS.IntraHOFailure.OverloadConditionFailure16COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. ENB內切換成功率（內切換成功率（2）切換出執(zhí)行成功率監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器ENB內切出成功數(shù)V

32、S.IncomingIntraHOSuccessVS_HO_IrC_succ_srcENB內切出準備成功數(shù)HO.IntraOutAtt.SumVS_HO_IrC_succ_prep_src監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器ENB內切入成功次數(shù)VS.IncomingIntraHOSuccessVS_HO_IrC_succ_tgtENB內切入請求次數(shù)VS.IncomingIntraHOAttemptVS_HO_IrC_req_tgt切換入執(zhí)行成功率與失敗原因原因分類監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器無線原因ENB內切入失敗（在其他小區(qū)重建RRC連接）VS.IntraHOFailure.RR

33、CConnectionReestabOnOtherCellVS_HO_IrC_fail_exec_ReestabOnOther_tgt_ODENB內切入失?。ㄔ谠^(qū)重建RRC連接）VS.IntraHOFailure.RRCConnectionReestabOnSourceCellVS_HO_IrC_fail_exec_ReestabOnSrc_tgt_ODENB內切入失敗（在原小區(qū)重建RRC連接）VS.IntraHOFailure.RRCConnectionReestabOnTargetCellVS_HO_IrC_fail_exec_ReestabOnTgt_tgt_ODENB內切入失?。ㄓ?/p>

34、時器超時）VS.IntraHOFailure.TimeoutVS_HO_IrC_fail_exec_TimeoutUE_tgt_OD終端問題ENB內切入失?。ㄍ暾运惴炞C失?。￢S.IntraHOFailure.IntegrityFailureVS_HO_IrC_fail_exec_integrity_tgt_OD設備故障ENB內切入失?。▋炔抗收希￢S.IntraHOFailure.InternalFailureVS_HO_IrC_fail_InternalFail_tgt_OD17COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHT

35、S RESERVED. 切換成功率優(yōu)化案切換成功率優(yōu)化案例例 準備失敗準備失敗小區(qū)名小區(qū)名S 1 切 出切 出請求數(shù)請求數(shù)S1切出準備切出準備成功數(shù)成功數(shù)S1切出準備切出準備成功率成功率X2切出請切出請求數(shù)求數(shù)X 2 切 出 準切 出 準備成功數(shù)備成功數(shù)X 2 切 出 準切 出 準備成功率備成功率長壽大樓長壽大樓_19600.00%00Nerr長壽大樓長壽大樓_237600.00%11100.00%長壽大樓長壽大樓_322800.00%22100.00%7月25日8：0010：00時段長壽大樓S1切換成功率為0，全部都是準備失敗：Call trace數(shù)據(jù)：UE占用長壽大樓_3小區(qū)，上報PCI

36、為22的測量報告，eNB向MME發(fā)送切換請求小區(qū)，目標小區(qū)為長壽移動大樓_1，但是都被核心網拒絕，收到handover preparation Failure(cause unknown-targetID)：切換準備失敗：18COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. 切換成功率優(yōu)化案例切換成功率優(yōu)化案例 準備失敗準備失敗切換流程圖:查看OMC告警，長壽大樓和長壽移動大樓的X2和S1連接從7月25日 7:53分開始即不可用，X2accessdown，到23：00恢復，告警消除，PTN故障解決后指標恢復。19

37、COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. 切換成功率優(yōu)化案例切換成功率優(yōu)化案例 執(zhí)行失敗執(zhí)行失敗上海Week25和Week26全網切換成功率較低，不到90，采集數(shù)據(jù)發(fā)現(xiàn)主要是由于靜金鷹，靜南成兩個站的S1切換失敗次數(shù)較高引起的：小區(qū)名小區(qū)名Week25Week 26S1切換失敗次S1切換請求次S1切換成功率S1切換失敗次S1切換請求次S1切換成功率jingjinyingALH_2687913.92%15418014.44%jingjinyingALH_324931520.95%21831330.35%ji

38、ngnanchengALH_19911916.81%789921.21%jingnanchengALH_211313415.67%14316513.33% 這兩個站位于卡特和華為邊界，卡特區(qū)域全網小區(qū)統(tǒng)計的切入失敗次數(shù)都比較低，懷疑是切換到華為的基站存在問題。之后進行了測試和OMC指標對比，測試切換全部成功，OMC統(tǒng)計結果只有2次成功：小區(qū)名小區(qū)名S1切換嘗切換嘗試次試次S1切出成功切出成功次次S1切換成切換成功率功率jingjinyingALH_100NerrjingjinyingALH_200NerrjingjinyingALH_316212.50%20COPYRIGHT 2011 ALC

39、ATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. 切換成功率優(yōu)化案切換成功率優(yōu)化案例例 執(zhí)行失敗執(zhí)行失敗無線側監(jiān)控S1切換的timer 為tS1RelocOverallForS1Handover，取值范圍1s 到10s。eNodeB發(fā)送S1-AP HANDOVER COMMAND后啟動該timer，收到MME下發(fā)的S1AP UE CONTEXT RELEASE COMMAND 消息停止計時。MME T3 定時器默認值為 10s ，UE完成切換發(fā)送handover notify后啟動，timer超時后才向源eNodeB下發(fā)拆鏈消息。解決方案： 修改T

40、3時長。 eNodeB側的call trace數(shù)據(jù)顯示14:30:02 MME下發(fā)切換命令，目標小區(qū)華為的愛中-HLH-1（ID為：L18527_1），但是無線側沒有收到核心網下發(fā)的切換成功的拆鏈消息，而是5秒后eNodeB側timer超時，eNodeB發(fā)送UE Context Release Request（cause tS1relocoverall -expiry）請求拆鏈，計為一次切換失敗。直到14:30:12 MME才下發(fā)UE Context Release Command。本次切換測試結果11ms UE即完成了切換，但是MME 10秒后才下發(fā)UE Context Release Co

41、mmand（causesuccessful handover ）的拆鏈消息，導致無線側的S1切換監(jiān)控timer超時，計為一次切換失敗。21COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. 切換切換優(yōu)化案例優(yōu)化案例 切換測量切換測量Counter名名Counter解釋解釋VS_HO_ReportedCell_NotSelectedUnknownCell測量報告上報的小區(qū)PCI未知VS_HO_ReportedCell_NotSelectedMobilityNotEnabled源小區(qū)未開啟切換或者是不允許向目標小區(qū)切換

42、VS_HO_ReportedCell_NotSelectedCellDisabled目標小區(qū)不可用VS_HO_ReportedCell_all_Selected測量報告上報的小區(qū)為切換目標小區(qū)VS_HO_ReportedCell_all_NotSelected_ratio測量報告上報的小區(qū)未作為切換目標小區(qū)的比例NPO中相關的計數(shù)器和指標：7月22日全天統(tǒng)計結果比例較高的小區(qū)主要是以下幾個：小區(qū)名小區(qū)名VS_HO_ReportedCell_NotSelectedUnknownCellVS_HO_ReportedCell_all_NotSelectedVS_HO_ReportedCell_all

43、_NotSelected_ratio長壽大樓長壽大樓_1777719.64%長壽大樓長壽大樓_2343411.26%長壽大樓長壽大樓_321421415.53%長壽移動大樓長壽移動大樓_1343436.17%長壽移動大樓長壽移動大樓_259959933.22%長壽移動大樓長壽移動大樓_3252596.15%22COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. 切換優(yōu)化案例切換優(yōu)化案例 切換測量切換測量開啟這兩個站的call trace，統(tǒng)計測量報告上報的小區(qū)PCI，其中長壽大樓測量報告中上報的小區(qū)則主要長壽移動大

44、樓_3（PCI為23）：長壽移動大樓_2測量報告中的目標小區(qū)為普澳寧_1小區(qū)（PCI 304）：檢查系統(tǒng)的參數(shù)文件，室內站長壽移動大樓的確是沒有加到普澳寧的切換關系，宏站長壽大樓未添加長壽移動大樓_3的鄰區(qū)關系。補全鄰區(qū)關系后指標恢復。在開啟ANR功能前，可以通過該指標來核查鄰區(qū)關系是否遺漏。23COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. 完整性指標完整性指標指標名監(jiān)控指標3GPP定義計數(shù)器ALU計數(shù)器下行誤塊率（高）BLER10%VS.DLResidualMacBLERWithDynamicSchedul

45、ing.GTThreshold4VS_BLER_DL_Hi下行誤塊率（中高）5%BLER=10%VS.DLResidualMacBLERWithDynamicScheduling.GTThreshold3LEThreshold4VS_BLER_DL_HiMed下行誤塊率（低高）2%BLER=5%VS.DLResidualMacBLERWithDynamicScheduling.GTThreshold2LEThreshold3VS_BLER_DL_HiLo下行誤塊率（中低）1%BLER=2%VS.DLResidualMacBLERWithDynamicScheduling.GTThreshold

46、1LEThreshold2VS_BLER_DL_LoMed下行誤塊率（低）BLER10%VS.ULResidualMacBLERWithDynamicScheduling.GTThreshold4VS_BLER_UL_Hi上行誤塊率（中高）5%BLER=10%VS.ULResidualMacBLERWithDynamicScheduling.GTThreshold3LEThreshold4VS_BLER_UL_HiMed上行誤塊率（低高）2%BLER=5%VS.ULResidualMacBLERWithDynamicScheduling.GTThreshold2LEThreshold3VS_B

47、LER_UL_HiLo上行誤塊率（中低）1%BLER=2%VS.ULResidualMacBLERWithDynamicScheduling.GTThreshold1LEThreshold2VS_BLER_UL_LoMed上行誤塊率（低）BLER=1%VS.ULResidualMacBLERWithDynamicScheduling.LEThreshold1VS_BLER_UL_Lo誤塊率誤塊率取決于無線環(huán)境與誤塊率目標參數(shù)。24COPYRIGHT 2011 ALCATEL-LUCENT SHANGHAI BELL. ALL RIGHTS RESERVED. 容量指標容量指標下行PDCP層流量

48、：監(jiān)控指標監(jiān)控指標3GPP定義計數(shù)器定義計數(shù)器ALU計數(shù)器計數(shù)器NPO indicator下行下行PDCP層流量（層流量（VoIP業(yè)務）業(yè)務）VS.DRBPdcpSduKbytesDL.VoIPVS_ERAB_VoIP_PDCP_SDU_UP_NotFromFwd_kbyte_DLVS_ERABs_all_PDCP_SDU_UP_NotFromFwd_kbyte_DL下行下行PDCP層流量（非層流量（非VoIP的的GBR業(yè)務）業(yè)務）VS.DRBPdcpSduKbytesDL.OtherGBRVS_ERABs_GBR_WithoutVoIP_PDCP_SDU_UP_NotFromFwd_kbyt

49、e_DL下行下行PDCP層流量（非層流量（非GBR業(yè)業(yè)務）務）VS.DRBPdcpSduKbytesDL.NonGBRVS_ERABs_NonGBR_PDCP_SDU_UP_NotFromFwd_kbyte_DL上行PDCP層流量：監(jiān)控指標監(jiān)控指標3GPP定義計數(shù)器定義計數(shù)器ALU計數(shù)器計數(shù)器NPO indicator上行上行PDCP層流量（層流量（VoIP業(yè)務）業(yè)務） VS.DRBPdcpSduKbytesUL.VoIPVS_ERAB_VoIP_PDCP_SDU_UP_NotFromFwd_kbyte_ULVS_ERABs_all_PDCP_SDU_UP_NotFromFwd_kbyte_UL上行上行PDCP層流量（非層流量（非VoIP的的GBR業(yè)務）業(yè)務）VS.DRBPdcpSduKby