Unknown-Target-RNC互操作失败问题处理报告

Unknown-Target-RNCUnknown-Target-RNC互操作失败问题处理扌报告23G互操作信令23G互操作信令RR1U:40:31.U93->rrc匚口门门已匚1U:40:31.U93->rrc匚口门门已匚：ti口门Setup(DL_CCCH]寸1iZ@Ji>wConnectionS已h」pCurnpletel'UL_D匚匚H]乙糸1统间切换ServiceRequest10:40:31.515->rrie.32urementCi：intn：il(Dl__D匚匚H]10:40:31.515-；：：Authentic.3i：ii：iriResponse10:40:31.515->measurementControlfDL_DCCH]1、概述在TD路测过程中，常常会出现有3A测量报告但未能进行23G互操作切换的现象，切换失败原因为Unknown-Target-RNC。在无线室，核心网，交换室几个部门的协助下，成功将问题定位并解决。主要内容如下：＞对全网的37个传统交换局和14个软交换局进行了23G互操作路由检查,发现软交换局GZS36和GZS38未定义对TD核心网的路由GZCM01V,通知交换室进行了路由补全。＞存在漏定义MSC级外部互操作邻区的情况。＞对2G全网的MSC级外部互操作邻区进行了检查，对漏定义的MSC级外部互操作邻区关系进行了补全。2、优化过程2.1问题分析进行23G互操作测试时,会遇到UE连续上报3A测量报告,但未能切换到GSM网络的现象。-0331-090359-1:1UARFCN匚PIRSCP(dBm)CarrierRSSI(PathLoss(dB)|Rs/RnCellNameDistan1007089-92.00-89.00125.00-78广州龙归山2T〔待测试］3639.E-0331-090359-1:1UARFCN匚PIRSCP(dBm)CarrierRSSI(PathLoss(dB)|Rs/RnCellNameDistan1007089-92.00-89.00125.00-78广州龙归山2T〔待测试］3639.E1009562-95.00-108.00fs.oo■广州荔香路11005.：1008718-96.00-106.00129.00广州竄埔旧港22776.7(1007969-103.00-114.00130.UU广州文船路T31483.E10087108^105.00-106.00138.00广州大沙地东2945.621007976a06.00-114.00139.00广州龙归山2T〔待测试:n639.8；10087112-109.00-106.00136.00.广州丰乐南路T1796.2E<Vl>1U:38:55.沁alionRequest1U:38:56.125->measurementContrcilfDL_DCCH]10:38:56.125-)Authentic.3l：ii：iriResponse1U:38:56.125■>rneasurementContrcilfDL_DCCH]10:38:56.125->IdentityRequest10:38:56.125->IdentityResponse1U:38:56.125■>securityModeCommand(DL_DCCH)1U:38:56.125■>securityModeComplete(UL_DCCH)1U:38:56.125■>rneasurementControlfD[_D匚匚H]10:38:56.125->Setup1U:38:5E；.453->TMSIReallocationComplete1U:38:56.453->CallProceeding1U:38:5E；.453->measurementControH'DL_DCCP^10:38:57.156->rrieasijrementControl(DL_DCCH连续3条3则量1U:38:57.156->radioE：earerSetup[DL_DCCH]1U:38:58.140->radioBearerSetupComplete(UL_10:38:59.125->Alerting-47.8BCCHEISICFlxLevel(dEim)ClC2CellID10:39:01.656->measurementReportfULDCCH1I1U:39:11.64U->measurementFleportfUl__D匚匚H]II1U:39:26.125■>measurementFleportfUL_D匚匚H]IJU.JU.45.1UU->D：uririt'1U:38:59.453->StatusEnquirv-70.5■93.3116.0-___一只有_3A测量报告不触一只有3A测量^报告不触1U:39:45.437->FleleaseComplete1U:39:46.14Li->rn:：CorinectionFlelease[DL_DCCH]1U:39:46.14Li->rri：：CorinectionFlelease[DL_DCCH]1U:39:46.14Li->rri：：CorinectionFleleaseCompletefUL_DCCH]1U:39:46.14U->rrcConnectionFlelease[DL_DC匚口]1U:39:46.140->rrcConnectionReleaseComplete(UL_DCCH)1U:39:46.656->rrcConnectionReleaseComplete(UL_DCCH)1U:39:47.125->masterlnformationBlock1U:40:30.437->rrcConnectionReauestfULCCCH'I观察LDT中的Trace，RNC每次收到UE上报的3A测量报告，都会向CN发送异系统切换请求RELOCATIONREQUIRED信令，但CN返回了RELOCATIONPREPARATIONFAILURE的命令，无法进行23G互操作切换到GSM网络。RELOCATIONPREPARATIONFAILURE中携带的切换失败原因为Unknown-Target-RNCPREPARATIONFAILURE中携带的切换失败原因为Unknown-Target-RNC。系统间切换失败原因从23G互操作切换信令流程来看，在进行23G互操作切换的时候，CN需要先与切换目标小区的MSC和BSC进行切换资源请求。如果因为某种原因导致CN无法正确的与切换目标小区的MSC和BSC进行互操作切换请求，或者请求被对方拒绝，就会出现上述的互操作切换失败现象。I.R曲MtimfeuuiTed作切换请求被MSC拒绝a5.4.H汕伽占晒咲川Al±孔H^rkio'erI.R曲MtimfeuuiTed作切换请求被MSC拒绝a5.4.H汕伽占晒咲川Al±孔H^rkio'er屉qu逊.n2.Prcjjnre、Hnncfo耀『FJCN发送的互操ftMoisuK®

CocnmandUnknown-Target-RNCUnknown-Target-RNC互操作失败问题处理扌报告之前出现过由于TD的GSM邻区经过割接，CGI有所改变，而由于在TD侧未及时进行互操作邻区CGI的更新，导致出现Unknown-Target-RNC的互操作切换失败现象。但在G网割接相关互操作邻区CGI更新流程完善之后，未再出现因GSM邻区参数不正确导致的互操作失败现象。2.2优化过程对多处的Unknown-Target-RNC互操作切换失败案例进行了GSM邻区参数的核查，未发现有参数设置错误的问题。对这类互操作失败问题有个共同之处是切换目标小区基本上都是属于软交换局。怀疑问题是出自TD和GSM的核心处。联合TD的核心网工程师，对核心网侧的23G互操作切换信令进行跟踪。反馈是CN在往切换目标小区的MSC发送切换请求时，对方MSC不接受切换请求。目前TD网络共有20个RNC，归属于2个MSC。RNC对应MSC如下表:RNCID所属RNCID所属MSCRNC1001GZCM01VRNC1002RNC1003RNC1005RNC1006RNC1007RNC1008RNC1009RNC1010RNC1019RNCID所属MSCRNC1004GZCM02VRNC1011RNC1012RNC1013RNC1014RNC1015RNC1016RNC1017RNC1018RNC1020RNC对应MSC一览表TD网络往GSM网络的互操作切换，属于跨MSC切换的类型。对爱立信的系统，需要在MSC定义相互的路由关系以及MSC级外部邻区关系，否则无法实现跨MSC的切换。对全网37个传统交换局和17个软交换局的互操作路由关系核查，发现软交换局GZS36和GZS38未定义对TD的GZCM01V的MSC邻区关系。OSS终端MSC路由关系查询命令如下:

MSC路由关系查询情况MSC路由关系未定义会导致在进行MSC级外部互操作邻区添加时，出现无法添加的现象。***ConnectedtoCZS36***<MCOCI:CELL=19257,1X1=460-00-42259-257,BSC=CZCI01V;■GOCI:CELL=19257,CC1=460-00-42258-257,aSC=CZCI01V,NOTACCEPTEDFAULTCODE2NEIGHBOURINGMSCDOESNOTEXISTMSC邻区添加异常情况通知交换室对GZS36和GZS38进行相关互操作路由的定义。根据交换室的反馈，为软交换局GZS36和GZS38定义了外部MSC路由GZCS01。即在GZS36和GZS38这2个MSC进行外部TD互操作邻区添加时，使用GZCS01代替原来的GZCM01V。

路由关系定义情况另外对全网的10655个MSC级外部互操作邻区进行了检查，共发现548个MSC级外部互操作邻区未定义，其中软交换局354个，传统交换局194个。对这部分邻区进行了增补。对遗留的Unknown-Target-RNC互操作切换失败问题点进行了验证测试，目前反馈都能够正常的进行23G互操作切换。2.3验证测试案例京珠高速TD小区广州长腰岭村1与GSM小区长腰岭村1进行互操作切换时出现Unknown-Target-RNC互操作切换失败现象。切换小区信息如下：TD小区：广州长腰岭村1,RNCID:RNC3；主频：10079；扰码：117；GSM小区：长腰岭村，MSC=GZS36；BSC=GZM24A,BCCH=65；BSIC=4；CGI=460-00-9457-26791；4月3日京珠高速现场测试互操作切换失败情况截图如下：村■93.3LUC@S3广州登城:M机1中―I.州址杪毋:产州钟摺谭F1匚匚F1匚HF雷匚F1-70.5■116.0□回区Ilap:l-[105S®_HSDPAACS_JtftSl_20090403-2]oE:113.46T6123H:23.40640TD-SCDM.^.DataPCCPCH_RSCP-1?6--100100--9595--9010--85馬H螯;田80--75>=-75^^Iessage-105国道_HS...□回区口㈣□□曰“Message曰“IJL-D匚匚H-忖essageE}-7mcFhic・丨口厂厂口「口口u「口—Lf!enrinGraph-10帝国道_H5DP£&CS_：|匕往南1_2009。403—2:1|旦||口|XintegrityChecklnforriBssageAutheriticatioriCoderrc-MessageSequenceNumber曰messageBme-asur已「「i已门tF；epmrtme-asur已m亡门th:lentity已p已ntFiesults!B-inf.erR.ATEventFiesuHsB-已ventID已％慮州五指埔■oGSIServing/Meighbor-105国道_HSDPAtCS_北往南l_2009...|fx|BCCHBSIC|RxLevel(dBm)|ciC2JCellID|CellName|Distance(m)|69777431■816233■847512■927123EIB7616■9E■“Servering/Neighbor一10吕国道_H5DP£&CS_：1匕往南1_2・・・口□凶uarfcn|cpi|RSCP(dBm)|CarrierRSSI(dBm)|PathLoss(dB)|Rs/Rn|CellName|Distanc八10079hi?[-85.00-84.00|18.OO|广州栈腰岭1119.2<J|I10054733100-87.00105.00广州k|§Ll4-2119.2310054127-8|00-87.00122.00广:州五指埔22484.0S1008756-93.00-107.00126.00广州钟落潭12058.9E1005430-97.00-87.00|24.00|notfoundinDBv<l<|meagurementReporQULDCCH)▲|：|■|匕」>》：测试截图在LDT中观察RELOCATIONREQUIRED信令中携带的切换目标小区的CGI为460-00-7457-26791。截图如下：站砖T厲胡心:cGt「pLHHrtsi盹BFOm.kcanu2£BS-W-«104310143S17731HSPSUEITP$S_HSW_fiLC_DATA_INDA.1TPSSQHSPS2(K»(M-a310：mO«517731HSFSflJE)MEASUREMEttTREPORTULIUE»>RNCaoowfl-cjio^iui43617731HSPSfUElMftM_HC_MEA$AEPQATjNOINTEAN^iRAC'>AAM200^0^-031048:1043617731U5PS(UE)RRM.HSPSJHTER.FIAT.HANDDVER.fiE01NTERNA1RRM>H5PS_MAINanmoa10431(114輻17731HSPSIUEIRAC_iUC_REL0CATIClH_REQIHTEAHAlRAC^IlC2IK&M-O31O4&W43817Z31USPSflJE)RATIHCRELOCAIinH^REf^HNTERNA1RAC->IUC2WW4^31Q4S1O*3817731HSPSfuElImANC->OM3D0St£H<03IQ49:1055817731HSPSOJE)7TPS5HSPSflLCDATAINDMTPSS-5H5PS2ttM4-0810Ld&1095817731HSP$(UEg/MEASUAEMEMTREPORT(JUUE->RNC20®W^3104S：1055317711HSPSjUli/MRM_HCjMEA5REPORTJNDINTERNAIRAC->HHM20£HMM-(]310143:105?517731USPSjUEfRELOKTEDNPREPARATIONFAILURE1UCW>RNC200^04^10431QI5?617731HSP$(UE)IU匚RAC_REL05EFf冋l_R$PIHTEAFMIILOfiAt200WM-a31048.1057617731uspyiE)lUC.RAC-RELOCPREPFAJL^RSPilMTERHAilUC->IRACaX&Ofl-Cr3i043iQi5?617731曉沟軒HSP$_AfiMJ.HTEA_RAT_HAfOOv£A_R$Ponteanaihsp$_majh->aam200^04-03104&1057817731U9P3OIE)RRM.HSPS.PHYCH-fiECONFlE_REq1NTERNAIRRM->!H5PS_MAINam他5?e17731声3miIMF0RMATI0NMES-SAGEA3HSP$^0AM$20®M-031QmO5?9177*31BK2JMSPSfUE)RRM^HSPS^PHYCHJECONFl见REQINTERNERRM寸H5PS.MA1时JWWJ-03104810157917731MSPSIUEIrac_iubc_rl_add_reqmTEAMAlRAC->IUBCLDT跟踪情况RELOCATIONPREPARATIONFAILURE中携带的原因为Unknown-Target-RNC。截图如下：IU2022UU馆RMHCMEAEREPORTINDMSl眾gelYrtf＞互操作切换失败原1因20®&*031Q4®104381773120的犠ID436廿挣2MB3O010(4610553177312DO^M031.D4£1055E177312W邓国却報10M917Z31200筑MS却4410舁517731犠ID57S1773120的厲曲值価山S?E177312HB4403104^1057E1773120094403104£1057B17731加映MK1Q報105761773120C珈心1Q備W57917F312tX&^031Q«tl057917731HSPSDUEJHSPSfUE]HSPSfUEJH5PS(UE)H?PS(UE]H$PS(UE]H5PSIUE]H^PSOUE]HSPSfUElHSPSmH亏F5晌HSP3WE)HSKRJE]RACJUCPELDCATIONREaINTEAHAJRaC'XUC沁£fKt.cafKxiPrepjr^BnFaiwe:2022RELOI>riONREQLJlA£DTPSS_HSPS_HLq_DA7A_IWDMEASUREMENTREPORTIUC_RA(LREIJOCFfiEPFAIL_RSPIUC_RAC_REIJOCPAEPFA1L.ASPHSPS_RRM_INTER_RAT_HAWDOVER』EPRRM_HSPS_PWYCM_RECONRG_REQRAC^IU8C_RL_ADD_REQRRM_HSPS_FHYCH_RECONFlG_REDINrORMATIOMMESSAGE[NIERHA1RAC>RRM山CM-?RHCIN7EAHAJlUC'>fiACINlEAHAJIUC'jRAItINIERNA1HSFS_MA1H->RINIERRAJRRM->HSPS_M.A3HSPS->QAM5iNIERHAJRRM->HSP$_l^INIERHAJRAC'XUBCRHC->CHTFSS^HSPSU£->RHC切换失败原因截图软交换局GZS36的互操作路由关系补全后，于4月22日进行了复测，现场测试能够从TD小区广州长腰岭村1互操作切换到GSM小区长腰岭村1。测试截图如下:TDServering/Neighbor-G105长展岭路段_23G互操.…lessage-GID石长區岭・・・UARfCN|CF「IRSCPldBmj3讷RSSIIpB创FPth5阔在；]|5$丿|QgllN日mg10079I1008710054100871006210079117[-92.0091.0056-95.00-106.0073-96.00-109.0034-96.00-10E.00113(109.00-11E.0093■111.00-10E.00广州长腰鹼村应急