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1、Presentation Author 5 22 2020 NSN2G 3G互操作 NSNCompetenceTeam Presentation Author 5 22 2020 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KPI2G 3G互操作优化 Presentation Author 5 22 2020 GSM 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
2、参数设置 Penaltytimers re selectiontimers Presentation Author 5 22 2020 3G 2G互操作的实现方法 IdleMode PSconnectedMode ConnectedModeAMRISHO CellReselection Inter RATHO S R 准则 压缩模式 Presentation Author 5 22 2020 GSM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 Referto 3GPP04 18 Prese
3、ntation Author 5 22 2020 升级要求 Presentation Author 5 22 2020 InIdleMode Normallycellre selectionisdonetocellhavingbettercoverage Bothquality CPICHEc No andrxlevel CPICHRSCP shouldbegoodenoughintheneighbourcellbeforecellre selectioncanhappenSignalquality levelrequirementsarecheckedwithS criteriaCellRa
4、nkingwithR criteriaisdonetoselectthebestcellfromallcellsfulfillingS criteria Presentation Author 5 22 2020 Cellselection S准则 Presentation Author 5 22 2020 Cellselection S准则 Squal Qqualmeas CPICHEc No QqualMinSrxlev Qrxlevmeas QrxlevMin Pcompensation Presentation Author 5 22 2020 Cellselection S准则 通过
5、S准则 找出SUITABLECELL Presentation Author 5 22 2020 CellRe selection R准则 R准则 重选出一个最好小区提供服务 Presentation Author 5 22 2020 CellReselection3G 2GProcedure FirstrankingofallthecellsbasedonCPICHRSCP WCDMA andRSSI GSM Rs CPICHRSCP Qhyst1Rn Rxlev n Qoffset1 Rn GSM Rs WCDMA AndRxlev GSM QrxlevMin Yes No Cellre
6、selectiontoGSM NeighbourWCDMAorGSMcellcalculationwithoffsetparameter ServingWCDMAcellcalculation withhysteresisparameter UEstartsGSMmeasurementsifCPICHEc No qQualMin sSearchRAT SintraSearch SinterSearch SsearchRAT CPICHEcNo qQualMin SecondrankingonlyforWCDMAcellsbasedonCPICHEc NoRs CPICHEc No Qhyst2
7、Rn CPICH Ec No n Qoffset2 Cellre selectiontoWCDMAcellofhighestRvalue 现网设置Qqualmin 18dBsSearchRAT 2 2 2 4 Qhyst1 0 Qhyst2 1 1 2 Qoffset1 0 Presentation Author 5 22 2020 CellRe selection R准则 ServingcellparametersSintrasearch SintersearchandSsearchRAT Intra Inter frequency Inter RATMeasurementThreshold
8、srespectively arecomparedwithSqual CPICHEc No Qqualmin inS criteriaforcellre selection UEwillmeasureneighbourcellsdependingonhowthemeasurementthresholdparametersareset sent ifparametersarenotsent UEshallmeasureallcells 1None Squal Sintrasearch UEneednotperformintra frequencymeasurements 2WCDMAintra
9、frequency Sintersearch Squal Sintrasearch 3WCDMAintra andinter frequency nointer RATcells SsearchRAT Squal Sintersearch 4WCDMAintra andinter frequencyandinter RATcells Squal SsearchRAT Presentation Author 5 22 2020 WCDMAtoWCDMACellRe selection Qmeas CPICHEc No t ServingWCDMACell NeighbourWCDMACell Q
10、hyst2 R SintrasearchSintersearchSsearchRAT Rs Rn Qqualmin Squals MeasurementofallWCDMAneighboursisstarted Theseparametersareusedtoavoidpingpongeffectincellre selection Qoffset2parametersforWCDMAneighbours ThresholdsusedwithS criteriainservingcell Note Rs ServingWCDMACellRn NeighbourWCDMACell Present
11、ation Author 5 22 2020 WCDMAtoGSMCellRe selectionNSNStrategy reselecttoGSMearly Qmeas CPICHEc No t ServingWCDMACell NeighbourGSMCell Qhyst1 4dB AdjgQoffset1 0dB SsearchRAT 4dB Rs Qqualmin 18dB Squals GSMMeasurementsstartswhenSqual CPICHEc No Qqualmin SsearchRAT i e CPICHEc No 14dB Rn Rs Cellre selec
12、tionToGSM Rs Note Rs ServingWCDMACellRn NeighbourGSMCell Qhyst1 0 Presentation Author 5 22 2020 IdleModeCellReselectionParameter WCEL Qhyst1 Qhyst2 Qhyst1isusedforTDDandGSMcells andforFDDcellswhencellselectionandre selectionqualitymeasureissettoCPICHRSCP CPICHEc No Qhyst1s Qhyst2s Thisparameterispar
13、tofSIB3 0 40 dB step2dB default 4dB HOPS AdjsQoffset1 AdjsQoffset2 Thisparameterisusedinthecellre selectionandrankingbetweenWCDMAcells ThevalueofthisparameterissubtractedfromthemeasuredCPICHRSCP CPICHEc No oftheintra frequencyneighbourcellbeforetheUEcomparesthequalitymeasurewiththecellre selection r
14、ankingcriteria 50 50 dB default 0dB HOPS AdjsQoffset1 AdjsQoffset2 HOPG AdjgQoffset1 AdjgQoffset2 WCELL TreselectionTheUEtriggersthereselectionofanewcellifthecellreselectioncriteriaarefulfilledduringthetimeintervalTreselection ThisparameterispartofSIB3 0 31 seconds default 0seconds 现网设为2s 重选速度变慢 但可能
15、减少乒乓重选 Presentation Author 5 22 2020 CrucialCell Re selectionParameters MinimumrequiredCPICHRSCP RXLEVoftheneighbourcellforcellre selectionGSMncellQrxlevMin RXLEV 110 47dBm step2 default 105dBm InterFreqNcellQrxlevMin IntraFreqNcellQrxlevMin CPICHRSCP 115 25dBm step2dBm default 115dBm InterFreqNcell
16、QqualMin IntraFreqNcellQqualMin Ec No 20 0dB step1dB default 20dB Offsetvalues CPICHRSCP RXLEV tobesubtractedfromneighbourcellbeforequalitycomparison re selection ranking InterFreqNcellQoffset1 IntraFreqNcellQoffset1 GSMncellQoffset1InterFreqNcellQoffset2 IntraFreqNcellQoffset2Range 50 50dB step1dB default0dBHysteresisvaluesofservingcellusedinrankingR criteriaQhyst1 forGSMcellsRSSI WCDMACPICHRSCP Qhyst2 forWCDMAcellsCPICHEc No Range0 40dB step2dB default0dB Presentation Author 5 22 2020 InConnec
