TD-LTE网络性能KPI(切换成功率)优化介绍材料

,.TD-LTE网络性能KPI（切换成功率）优化手册1 切换成功率定义说明1.1 指标公式指标名称 集团规范公式 NSN映射公式（eNB间S1切换出成功次数+eNB间X2切换出成功次数+eNB内切换出成 100*sum(M8009C7+M8014C7+精品文档放心下载切换成功率 功次数）/（eNB间S1切换出请求次 M8014C19)/sum(M8009C6+M8014C0+谢谢阅读数+eNB间X2切换出请求次数+eNB M8014C14)精品文档放心下载内切换出请求次数）*100%1.2 COUNTER定义1.2.1 集团规范定义1、eNB间S1切换出请求次数：eNB向MME发送的“切换请求”消息（HANDOVERREQUIRED）（3GPPTS36.413），指感谢阅读eNB间通过S1接口的切换出准备请求。向不同小区发送的同一切换准备请求，需要重复统计。感谢阅读2、eNB间S1切换出成功次数：eNB收到MME发送的“UE上下文释放命令”消息（UECONTEXTRELEASECOMMAND）（3GPPTS36.413），指示eNB间通过S1接口的切换出执行成功。感谢阅读3、eNB间X2切换出请求次数：eNB向目标eNB发送的“切换请求”消息（HANDOVERREQUEST）（3GPPTS36.423），指示eNB间通过X2接口的切换出准备请求。向不同小区发送的同一切换准备请求，重复统计。感谢阅读4、eNB间X2切换出成功次数：eNB收到目标eNB发送的“UE上下文释放”消息（UECONTEXTRELEASE）（3GPPTS36.423），指示eNB间通过X2接口的切换出执行成功。感谢阅读5、eNB内切换出请求次数：eNB向UE发送携带mobilityControlInfo的“RRC连接重配置”消息（RRCConnectionReconfiguration），指示eNB内小区间切换出请求。（3GPPTS36.331）感谢阅读6、eNB内切换出成功次数：,.eNB收到UE发送的“RRC连接重配置完成”消息（RRCConnectionReconfigurationComplete），指示eNB内小区间切换出成功。（3GPPTS36.331）感谢阅读1.2.2 NSN映射1、eNB间S1切换出请求次数：M8014C14：INTER_ENB_S1_HO_PREP，ThenumberofIntereNBS1-basedHandoverpreparations；精品文档放心下载2、eNB间S1切换出成功次数：M8014C19：INTER_ENB_S1_HO_SUCC，ThenumberofsuccessfulIntereNBS1-basedHandovercompletions；感谢阅读3、eNB间X2切换出请求次数：M8014C0：INTER_ENB_HO_PREP，ThenumberofInter-eNBX2-basedHandoverpreparations.TheMobilitymanagement(MM)receivesalistwithtargetcellsfromtheRRManddecidestostartanInter-eNBX2-basedHandover；感谢阅读4、eNB间X2切换出成功次数：M8014C7：SUCC_INTER_ENB_HO，ThenumberofsuccessfulInter-eNBX2-basedHandovercompletions；谢谢阅读5、eNB内切换出请求次数：M8009C6：ATT_INTRA_ENB_HO，ThenumberofIntra-eNBHandoverattempts；谢谢阅读6、eNB内切换出成功次数：M8009C7：SUCC_INTRA_ENB_HO，Thecompletions；感谢阅读1.3 信令统计点1.3.1 eNB间S1切换CounterCounterIDeNB间S1切换请求次数M8014C14eNB间S1切换目标小区准备M8014C15M8014C16失败次数M8014C17eNB间S1切换尝试次数M8014C18eNB间S1切换成功次数M8014C19eNB间S1切换失败次数M8014C20

numberofsuccessfulIntra-eNBHandover精品文档放心下载NetActnameINTER_ENB_S1_HO_PREPINTER_S1_HO_PREP_FAIL_TIME谢谢阅读INTER_S1_HO_PREP_FAIL_NORR感谢阅读INTER_S1_HO_PREP_FAIL_OTHER精品文档放心下载INTER_ENB_S1_HO_ATTINTER_ENB_S1_HO_SUCCINTER_ENB_S1_HO_FAIL,.统计点关系：M8014C14=M8014C15+M8014C16+M8014C17+M8014C18M8014C18=M8014C19+M8014C20（注：现网实际数据对不上）感谢阅读1、M8014C14：INTER_ENB_S1_HO_PREP精品文档放心下载Updated:ThiscounterisupdatedfollowingthetransmissionofanS1AP:HANDOVERREQUIREDmessagefromthesourceeNBtotheMMEifthismessagepreparesanIntereNBHandover.感谢阅读2、M8014C15：INTER_S1_HO_PREP_FAIL_TIME感谢阅读Updated:ThiscounterisupdatedattheexpiryoftheguardingtimerTS1RELOCprepifthetimerwasstartedbecauseofthepreparationofanIntereNBHandover.感谢阅读3、M8014C16：INTER_S1_HO_PREP_FAIL_NORR感谢阅读Updated:ThiscounterisupdatedfollowingthereceptionofanS1AP:HANDOVERPREPARATIONFAILUREmessagefromMMEtosourceeNBwithcause"NoRadioResourcesAvailableinTargetCell"ifthismessageisreceivedinresponsetothepreparationofanIntereNBHandover.谢谢阅读4、M8014C17：INTER_S1_HO_PREP_FAIL_OTHER谢谢阅读Updated:ThenumberoffailedIntereNBS1-basedHandoverpreparationsduetothereceptionofanS1AP:HANDOVERPREPARATIONFAILUREmessagewithacauseotherthan"NoRadioResourcesAvailableinTargetCell."精品文档放心下载5、M8014C18：INTER_ENB_S1_HO_ATT感谢阅读Updated:ThiscounterisupdatedfollowingthereceptionofanS1AP:HANDOVERCOMMANDmessagefromtheMMEtothesourceeNBincasethatthismessageisreceivedinresponsetothepreparationofanIntereNBHandover.感谢阅读,.6、M8014C19：INTER_ENB_S1_HO_SUCC感谢阅读Updated:ThiscounterisupdatedfollowingthereceptionofanS1AP:UECONTEXTRELEASECOMMANDmessagefromtheMMEtothesourceeNBwiththecausevalueRadioNetworkLayer(SuccessfulHandover)incasethatthismessageisreceivedforanIntereNBHandover.谢谢阅读7、M8014C20：INTER_ENB_S1_HO_FAIL精品文档放心下载Updated:ThiscounterisupdatedfollowingtheexpiryoftheguardingtimerTS1RELOCoverallincasethatthistimerwasstartedbecauseofanIntereNBHandover.谢谢阅读1.3.2 eNB间X2切换CounterCounterIDNetActnameeNB间X2切换请求次数M8014C0INTER_ENB_HO_PREPeNB间X2切换目标小区准备M8014C2FAIL_ENB_HO_PREP_TIME,.失败次数M8014C3FAIL_ENB_HO_PREP_ACM8014C5FAIL_ENB_HO_PREP_OTHEReNB间X2切换尝试次数M8014C6ATT_INTER_ENB_HOeNB间X2切换成功次数M8014C7SUCC_INTER_ENB_HOeNB间X2切换失败次数M8014C8INTER_ENB_HO_FAIL统计点关系：M8014C0=M8014C2+M8014C3+M8014C5+M8014C6M8014C6=M8014C7+M8014C8（注：现网实际数据对不上）谢谢阅读1、M8014C0：INTER_ENB_HO_PREP谢谢阅读Updated:ThiscounterisupdatedfollowingthetransmissionofanX2AP:HandoverRequesttothetargeteNB.谢谢阅读,.2、M8014C2：FAIL_ENB_HO_PREP_TIME感谢阅读Updated:ThiscounterisupdatedfollowingtheexpiryoftheguardingtimerTX2RELOCprep.感谢阅读3、M8014C3：FAIL_ENB_HO_PREP_AC精品文档放心下载Updated:ThiscounterisupdatedfollowingthereceptionofanX2AP:HandoverPreparationFailuremessagefromthetargeteNB.精品文档放心下载4、M8014C5：FAIL_ENB_HO_PREP_OTHER谢谢阅读Updated:Thecounterisupdatedifthefailuredetecteddoesnotmatchanyotherfailurecounter.精品文档放心下载5、M8014C6：ATT_INTER_ENB_HO谢谢阅读Updated:ThiscounterisupdatedfollowingthereceptionofanX2AP:HandoverRequestAcknowledgemessagefromthetargeteNB.精品文档放心下载6、M8014C7：SUCC_INTER_ENB_HO精品文档放心下载Updated:ThiscounterisupdatedfollowingthereceptionofanX2AP:Release精品文档放心下载,.ResourcemessagesentbythetargeteNB.精品文档放心下载7、M8014C8：INTER_ENB_HO_FAIL感谢阅读Updated:ThiscounterisupdatedfollowingtheexpiryoftheguardingtimerTX2RELOCoverall.感谢阅读1.3.3 eNB内切换CounterCounterIDNetActnameeNB内收到MR次数M8009C0TOT_NOT_START_HO_PREPeNB内切换决断次数M8009C1TOT_HO_DECISIONeNB内切换请求次数M8009C2INTRA_ENB_HO_PREPeNB内切换准备失败次数M8009C3FAIL_ENB_HO_PREP_AC,.M8009C5FAIL_ENB_HO_PREP_OTHeNB内切换尝试次数M8009C6ATT_INTRA_ENB_HOeNB内切换成功次数M8009C7SUCC_INTRA_ENB_HOeNB内切换执行失败次数M8009C8ENB_INTRA_HO_FAIL统计点关系：M8009C1>M8014C2M8014C2=M8014C3+M8014C5+M8014C6精品文档放心下载M8014C6=M8014C7+M8014C8（注：现网实际数据对不上）谢谢阅读1、M8009C0:TOT_NOT_START_HO_PREP感谢阅读Updated:ThereceptionofanRRCMeasurementReportmessagesentbytheUEtoeNBandoftheRRMdecisionnottoexecuteahandover.Updatedtothesourcecell.感谢阅读2、M8009C1:TOT_HO_DECISION精品文档放心下载Updated:ThereceptionofanRRCMeasurementReportmessagesentbytheUEtoeNBandofanRRMdecisiontoexecuteahandover.Updatedtothesourcecell.谢谢阅读,.3、M8009C2:INTRA_ENB_HO_PREP感谢阅读Updated:AninternaleNBtrigger.TheeNBMMreceivesalistwiththetargetcellsfromRRManddecidesonanIntra-eNBHandover.Updatedtothesourcecell.感谢阅读4、M8009C6:ATT_INTRA_ENB_HO谢谢阅读Updated:ThetransmissionofanRRCConnectionReconfigurationmessagesentbytheeNBtoUE,whichindicatesaHandoverCommandtotheUE.Updatedtothesourcecell.精品文档放心下载5、M8009C7:SUCC_INTRA_ENB_HO感谢阅读Updated:ThereceptionofaninternalUEContextReleaseRequestforthehandoveronthesourceside.Updatedtothesourcecell.精品文档放心下载6、M8009C3:FAIL_ENB_HO_PREP_AC精品文档放心下载Updated:AninternaleNBtrigger.TheeNBMMreceivesalistwiththetargetcellsfromtheRRM.TheMMorRRMACdecidesnottoexecuteanIntra-eNBHandover.Updatedtothesourcecell.感谢阅读7、M8009C5:FAIL_ENB_HO_PREP_OTH谢谢阅读Updated:AninternaleNBtrigger.TheeNBMMreceivesalistwiththetargetcellsfromRRM.TheMMorRRMACdecidesnottoexecuteanIntra-eNBHandover.Thecounterisupdatedifthefailuredetecteddoesnotmatchanyotherfailurecounter.Updatedtothesourcecell.精品文档放心下载,.8、M8009C8:ENB_INTRA_HO_FAIL精品文档放心下载Updated:ThecounterisupdatedtothesourcecellwhentimerTHOoverallexpires.感谢阅读2 影响切换成功率的因素2.1 从信令流程角度分析（注：个别流程可以会有不同，但大致相当，此处仅以X2切换为例。eNB内切换流程更少，eNB间S1切换仅多了有线侧的信令，如果丢失均属于传输侧问题）感谢阅读2.1.1 切换判决阶段（注：此阶段不会影响后台统计切换成功率指标）1）现象：eNB未收到测量报告覆盖、干扰等无线环境问题,.因PDCCH问题导致UE上发测量报告的ULGRANT没有收到；因PUSCH问题导致eNB未收到或收到CRC校验出错）精品文档放心下载➢ UE内部处理问题2）现象：eNB未发送切换请求➢ 参数问题：如触发事件门限过晚等，未及时触发测量报告谢谢阅读➢ 邻区漏配➢ 黑名单2.1.2 切换准备阶段1）现象：切换请求发出，对方未收到➢ 传输丢包2）现象：目标小区拒绝➢ 目标小区准入控制、容量问题3）现象：目标小区回准备失败➢ 已知的有unknown-MME-Code➢ 其余的需要跟着LOG确定具体原因值4）现象：TX2RELOCprep准备超时➢ 目标小区故障、告警➢ 目标小区休眠2.1.3 切换执行阶段1）现象：切换命令（RRC连接重配）丢失➢ 覆盖、干扰等无线环境问题UE下行PDCCH解析失败，下行PDCCH受限精品文档放心下载UE下行PDSCH解析失败，下行PDSCH受限谢谢阅读2）现象：切换完成信令（RRC连接重配完成）丢失➢ 覆盖、干扰等无线环境问题UE在目标小区的PREAMBLE，eNB没有收到，上行PRACH受限UE下行接收RAR失败，下行PDSCH受限感谢阅读UE上发切换完成，eNB没有收到，上行PUSCH受限感谢阅读3）现象：在非真正的目标小区接入失败➢ PCI混淆4）现象：目标小区非最优小区➢ 邻区混乱、漏配5）现象：源eNB发起HandoverCancel精品文档放心下载➢ 覆盖、干扰