诺西2G3G互操作

SocClassificationlevel1©NokiaSiemensNetworksPresentation/Author/DateNSN2G-3G互操作NSNCompetenceTeamSocClassificationlevel2©NokiaSiemensNetworksPresentation/Author/Date内容•3G/2G基本原理信令流程•NSN2G/3G互操作策略建议•3G/2G互操作相关参数•3G/2G互操作相关KPI•2G/3G互操作优化3©NokiaSiemensNetworksPresentation/Author/DateGSM–WCDMA互操作GSM–WCDMA互操作空闲模式下优先附着提供覆盖连续性数据业务连续性业务质量优化负荷平衡基于负载的切换基于负载的呼叫控制小区重选分组域切换基于业务的切换基于覆盖的切换空闲模式参数设置Penaltytimers,re-selectiontimers4©NokiaSiemensNetworksPresentation/Author/Date3G/2G互操作的实现方法IdleMode/PSconnectedModeConnectedModeAMRISHO•CellReselection•Inter-RATHOS-/R-准则压缩模式5©NokiaSiemensNetworksPresentation/Author/DateGSM系统升级GSM为支持系统间小区选择/重选，需要GSM网络升级支持相关数据配置和系统消息。需要GSM系统增加配置WCDMA邻区以及与小区重选相关的数据•增加系统消息SI2quater•修改系统消息SI3•修改系统消息SI2terReferto‘3GPP04.18’6©NokiaSiemensNetworksPresentation/Author/Date升级要求7©NokiaSiemensNetworksPresentation/Author/DateInIdleModeNormallycellre-selectionisdonetocellhavingbettercoverage.Bothquality(CPICHEc/No)andrxlevel(CPICHRSCP)shouldbegoodenoughintheneighbourcellbeforecellre-selectioncanhappenSignalquality&levelrequirementsarecheckedwithS-criteriaCellRankingwithR-criteriaisdonetoselectthebestcellfromallcellsfulfillingS-criteria,GSMGSMGSMGSMGSMGSMWCDMAWCDMAWCDMAWCDMAWCDMAWCDMAGSMGSMGSMGSMWCDMAWCDMAGPRS/IMSIAttachedUEmakescellreselectiontoWCDMAMaximizeWCDMAuseUEmakescellreselectiontoGSMlayerforcoveragereasonWCDMAWCDMAGSMGSMGSMGSMGSMGSMWCDMAWCDMAWCDMAWCDMAWCDMAWCDMAGSMGSMGSMGSMWCDMAWCDMAGPRS/IMSIAttachedUEmakescellreselectiontoWCDMAMaximizeWCDMAuseUEmakescellreselectiontoGSMlayerforcoveragereasonWCDMAWCDMA8©NokiaSiemensNetworksPresentation/Author/DateCellselection:S准则9©NokiaSiemensNetworksPresentation/Author/DateCellselection:S准则Squal=Qqualmeas(CPICHEc/No)–QqualMinSrxlev=Qrxlevmeas–QrxlevMin-Pcompensation10©NokiaSiemensNetworksPresentation/Author/DateCellselection:S准则通过S准则，找出SUITABLECELL11©NokiaSiemensNetworksPresentation/Author/DateCellRe-selection:R准则R准则：重选出一个最好小区提供服务12©NokiaSiemensNetworksPresentation/Author/DateCellReselection3G-2GProcedureFirstrankingofallthecellsbasedonCPICHRSCP(WCDMA)andRSSI(GSM)Rs=CPICHRSCP+Qhyst1Rn=Rxlev(n)-Qoffset1Rn(GSM)Rs(WCDMA)AndRxlev(GSM)QrxlevMinYesNoCellre-selectiontoGSMNeighbourWCDMAorGSMcellcalculationwithoffsetparameterServingWCDMAcellcalculation,withhysteresisparameterUEstartsGSMmeasurementsifCPICHEc/NoqQualMin+sSearchRATSintraSearchSinterSearchSsearchRATCPICHEcNoqQualMinSecondrankingonlyforWCDMAcellsbasedonCPICHEc/NoRs=CPICHEc/No+Qhyst2Rn=CPICH_Ec/No(n)-Qoffset2Cellre-selectiontoWCDMAcellofhighestRvalue现网设置Qqualmin=-18dBsSearchRAT=2（2*2=4）Qhyst1=0，Qhyst2=1（1*2），Qoffset1=013©NokiaSiemensNetworksPresentation/Author/DateCellRe-selection:R准则ServingcellparametersSintrasearch,SintersearchandSsearchRAT(Intra-,Inter-frequency,Inter-RATMeasurementThresholdsrespectively)arecomparedwithSqual(CPICHEc/No-Qqualmin)inS-criteriaforcellre-selection.UEwillmeasureneighbourcellsdependingonhowthemeasurementthresholdparametersareset&sent(ifparametersarenotsent,UEshallmeasureallcells)•1None(SqualSintrasearch)–UEneednotperformintra-frequencymeasurements.•2WCDMAintra-frequency(SintersearchSqualSintrasearch)•3WCDMAintra-andinter-frequency,nointer-RATcells(SsearchRATSqualSintersearch)•4WCDMAintra-andinter-frequencyandinter-RATcells(SqualSsearchRAT)SintrasearchSintersearchSsearchRATWCDMACELL123414©NokiaSiemensNetworksPresentation/Author/DateWCDMAtoWCDMACellRe-selectionQmeas(CPICHEc/No)tServingWCDMACellNeighbourWCDMACellQhyst2RIntraFreqNcellQoffset2InterFreqNcellQoffset2SintrasearchSintersearchSsearchRATRsRnQqualminSqualsMeasurementofallWCDMAneighboursisstartedRnRs=Cellre-selectionTheseparametersareusedtoavoidpingpongeffectincellre-selectionQoffset2parametersforWCDMAneighboursThresholdsusedwithS-criteriainservingcellNote:Rs=ServingWCDMACellRn=NeighbourWCDMACell15©NokiaSiemensNetworksPresentation/Author/DateWCDMAtoGSMCellRe-selectionNSNStrategy:reselecttoGSMearlyQmeas(CPICHEc/No)tServingWCDMACellNeighbourGSMCellQhyst1=4dBAdjgQoffset1=0dBSsearchRAT=4dBRsQqualmin=-18dBSqualsGSMMeasurementsstartswhenSqual=CPICHEc/No-QqualminSsearchRAT:i.e.CPICHEc/No-14dBRnRs=Cellre-selectionToGSMRsNote:Rs=ServingWCDMACellRn=NeighbourGSMCellQhyst1=018©NokiaSiemensNetworksPresentation/Author/DateInConnectedModeTriggersforConnectedModeISHOshallbebasedonCoverageReason:系统间切换只能根据CPICH的RSCP值来判定•CPICHRSCP•Notenabled:CPICHEc/NO,UETxPower,ULQuality,DLQualityRationalforISHOTriggerusingCPICHRSCPonly:•Toavoidunnecessaryping-pongISHOinareasofslightpilotpollutionwithinUrbancityarea,whereCPICHEc/NovaluesmayhittheplannedthresholdtotriggerISHOunnecessarily.Option19©NokiaSiemensNetworksPresentation/Author/Date系统间切换信令流程UE发送切换触发消息到RNC后，RNC发送RRC消息“MeasurementControl”到UE，指导UE对目标GSM小区进行测量，并周期性发回测量报告收到UE上报的测量报告后，RNC应用“滑动平均窗口”对所有测量值进行对比分析，以决定IS-HORNCRRC:”Measurementcontrol”message(GSMRSSImeasurements)UERNCRXLEVmeasurementsarereportedthrough”Measurementreport”messagesUERRC:”Measurementreport”RRC:”Measurementreport”ThefirstmeasurementreporthasinfofromthebestGSMcell:BCCHfreq&RSSI,nofilteringusedinUEGsmMeasRepInterval(default0.5s)