Unknown-Target-RNC互操作失敗問題處理報告

Unknown-Target-RNCUnknown-Target-RNC互操作失敗問題處理扌報告23G互操作信令23G互操作信令RR1U:40:31.U93->rrc匚口門門已匚1U:40:31.U93->rrc匚口門門已匚：ti口門Setup(DL_CCCH]寸1iZ@Ji>wConnectionS已h」pCurnpletel'UL_D匚匚H]乙糸1統(tǒng)間切換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路測過程中，常常會出現(xiàn)有3A測量報告但未能進行23G互操作切換的現(xiàn)象，切換失敗原因為Unknown-Target-RNC。在無線室，核心網(wǎng)，交換室?guī)讉€部門的協(xié)助下，成功將問題定位并解決。主要內(nèi)容如下：＞對全網(wǎng)的37個傳統(tǒng)交換局和14個軟交換局進行了23G互操作路由檢查,發(fā)現(xiàn)軟交換局GZS36和GZS38未定義對TD核心網(wǎng)的路由GZCM01V,通知交換室進行了路由補全。＞存在漏定義MSC級外部互操作鄰區(qū)的情況。＞對2G全網(wǎng)的MSC級外部互操作鄰區(qū)進行了檢查，對漏定義的MSC級外部互操作鄰區(qū)關系進行了補全。2、優(yōu)化過程2.1問題分析進行23G互操作測試時,會遇到UE連續(xù)上報3A測量報告,但未能切換到GSM網(wǎng)絡的現(xiàn)象。-0331-090359-1:1UARFCN匚PIRSCP(dBm)CarrierRSSI(PathLoss(dB)|Rs/RnCellNameDistan1007089-92.00-89.00125.00-78廣州龍歸山2T〔待測試］3639.E-0331-090359-1:1UARFCN匚PIRSCP(dBm)CarrierRSSI(PathLoss(dB)|Rs/RnCellNameDistan1007089-92.00-89.00125.00-78廣州龍歸山2T〔待測試］3639.E1009562-95.00-108.00fs.oo■廣州荔香路11005.：1008718-96.00-106.00129.00廣州竄埔舊港22776.7(1007969-103.00-114.00130.UU廣州文船路T31483.E10087108^105.00-106.00138.00廣州大沙地東2945.621007976a06.00-114.00139.00廣州龍歸山2T〔待測試:n639.8；10087112-109.00-106.00136.00.廣州豐樂南路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連續(xù)3條3則量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測量報告不觸一只有3A測量^報告不觸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觀察LDT中的Trace，RNC每次收到UE上報的3A測量報告，都會向CN發(fā)送異系統(tǒng)切換請求RELOCATIONREQUIRED信令，但CN返回了RELOCATIONPREPARATIONFAILURE的命令，無法進行23G互操作切換到GSM網(wǎng)絡。RELOCATIONPREPARATIONFAILURE中攜帶的切換失敗原因為Unknown-Target-RNCPREPARATIONFAILURE中攜帶的切換失敗原因為Unknown-Target-RNC。系統(tǒng)間切換失敗原因從23G互操作切換信令流程來看，在進行23G互操作切換的時候，CN需要先與切換目標小區(qū)的MSC和BSC進行切換資源請求。如果因為某種原因導致CN無法正確的與切換目標小區(qū)的MSC和BSC進行互操作切換請求，或者請求被對方拒絕，就會出現(xiàn)上述的互操作切換失敗現(xiàn)象。I.R曲MtimfeuuiTed作切換請求被MSC拒絕a5.4.H汕伽占曬咲川Al±孔H^rkio'erI.R曲MtimfeuuiTed作切換請求被MSC拒絕a5.4.H汕伽占曬咲川Al±孔H^rkio'er屜qu遜.n2.Prcjjnre、Hnncfo耀『FJCN發(fā)送的互操ftMoisuK?

CocnmandUnknown-Target-RNCUnknown-Target-RNC互操作失敗問題處理扌報告之前出現(xiàn)過由于TD的GSM鄰區(qū)經(jīng)過割接，CGI有所改變，而由于在TD側未及時進行互操作鄰區(qū)CGI的更新，導致出現(xiàn)Unknown-Target-RNC的互操作切換失敗現(xiàn)象。但在G網(wǎng)割接相關互操作鄰區(qū)CGI更新流程完善之后，未再出現(xiàn)因GSM鄰區(qū)參數(shù)不正確導致的互操作失敗現(xiàn)象。2.2優(yōu)化過程對多處的Unknown-Target-RNC互操作切換失敗案例進行了GSM鄰區(qū)參數(shù)的核查，未發(fā)現(xiàn)有參數(shù)設置錯誤的問題。對這類互操作失敗問題有個共同之處是切換目標小區(qū)基本上都是屬于軟交換局。懷疑問題是出自TD和GSM的核心處。聯(lián)合TD的核心網(wǎng)工程師，對核心網(wǎng)側的23G互操作切換信令進行跟蹤。反饋是CN在往切換目標小區(qū)的MSC發(fā)送切換請求時，對方MSC不接受切換請求。目前TD網(wǎng)絡共有20個RNC，歸屬于2個MSC。RNC對應MSC如下表:RNCID所屬RNCID所屬MSCRNC1001GZCM01VRNC1002RNC1003RNC1005RNC1006RNC1007RNC1008RNC1009RNC1010RNC1019RNCID所屬MSCRNC1004GZCM02VRNC1011RNC1012RNC1013RNC1014RNC1015RNC1016RNC1017RNC1018RNC1020RNC對應MSC一覽表TD網(wǎng)絡往GSM網(wǎng)絡的互操作切換，屬于跨MSC切換的類型。對愛立信的系統(tǒng)，需要在MSC定義相互的路由關系以及MSC級外部鄰區(qū)關系，否則無法實現(xiàn)跨MSC的切換。對全網(wǎng)37個傳統(tǒng)交換局和17個軟交換局的互操作路由關系核查，發(fā)現(xiàn)軟交換局GZS36和GZS38未定義對TD的GZCM01V的MSC鄰區(qū)關系。OSS終端MSC路由關系查詢命令如下:

MSC路由關系查詢情況MSC路由關系未定義會導致在進行MSC級外部互操作鄰區(qū)添加時，出現(xiàn)無法添加的現(xiàn)象。***ConnectedtoCZS36***<MCOCI:CELL=19257,1X1=460-00-42259-257,BSC=CZCI01V;■GOCI:CELL=19257,CC1=460-00-42258-257,aSC=CZCI01V,NOTACCEPTEDFAULTCODE2NEIGHBOURINGMSCDOESNOTEXISTMSC鄰區(qū)添加異常情況通知交換室對GZS36和GZS38進行相關互操作路由的定義。根據(jù)交換室的反饋，為軟交換局GZS36和GZS38定義了外部MSC路由GZCS01。即在GZS36和GZS38這2個MSC進行外部TD互操作鄰區(qū)添加時，使用GZCS01代替原來的GZCM01V。

路由關系定義情況另外對全網(wǎng)的10655個MSC級外部互操作鄰區(qū)進行了檢查，共發(fā)現(xiàn)548個MSC級外部互操作鄰區(qū)未定義，其中軟交換局354個，傳統(tǒng)交換局194個。對這部分鄰區(qū)進行了增補。對遺留的Unknown-Target-RNC互操作切換失敗問題點進行了驗證測試，目前反饋都能夠正常的進行23G互操作切換。2.3驗證測試案例京珠高速TD小區(qū)廣州長腰嶺村1與GSM小區(qū)長腰嶺村1進行互操作切換時出現(xiàn)Unknown-Target-RNC互操作切換失敗現(xiàn)象。切換小區(qū)信息如下：TD小區(qū)：廣州長腰嶺村1,RNCID:RNC3；主頻：10079；擾碼：117；GSM小區(qū)：長腰嶺村，MSC=GZS36；BSC=GZM24A,BCCH=65；BSIC=4；CGI=460-00-9457-26791；4月3日京珠高速現(xiàn)場測試互操作切換失敗情況截圖如下：村■93.3LUC@S3廣州登城:M機1中―I.州址杪毋:產(chǎn)州鐘摺譚F1匚匚F1匚HF雷匚F1-70.5■116.0□回區(qū)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國道_HS...□回區(qū)口㈣□□曰“Message曰“IJL-D匚匚H-忖essageE}-7mcFhic?丨口廠廠口「口口u「口—Lf!enrinGraph-10帝國道_H5DP￡&CS_：|匕往南1_2009。403—2:1|旦||口|XintegrityChecklnforriBssageAutheriticatioriCoderrc-MessageSequenceNumber曰messageBme-asur已「「i已門tF；epmrtme-asur已m亡門th:lentity已p已ntFiesults!B-inf.erR.ATEventFiesuHsB-已ventID已％慮州五指埔■oGSIServing/Meighbor-105國道_HSDPAtCS_北往南l_2009...|fx|BCCHBSIC|RxLevel(dBm)|ciC2JCellID|CellName|Distance(m)|69777431■816233■847512■927123EIB7616■9E■“Servering/Neighbor一10呂國道_H5DP￡&CS_：1匕往南1_2???口□兇uarfcn|cpi|RSCP(dBm)|CarrierRSSI(dBm)|PathLoss(dB)|Rs/Rn|CellName|Distanc八10079hi?[-85.00-84.00|18.OO|廣州棧腰嶺1119.2<J|I10054733100-87.00105.00廣州k|§Ll4-2119.2310054127-8|00-87.00122.00廣:州五指埔22484.0S1008756-93.00-107.00126.00廣州鐘落潭12058.9E1005430-97.00-87.00|24.00|notfoundinDBv<l<|meagurementReporQULDCCH)▲|：|■|匕」>》：測試截圖在LDT中觀察RELOCATIONREQUIRED信令中攜帶的切換目標小區(qū)的CGI為460-00-7457-26791。截圖如下：站磚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$PIHTEAFMIILOfiAt200WM-a31048.1057617731uspyiE)lUC.RAC-RELOCPREPFAJL^RSPilMTERHAilUC->IRACaX&Ofl-Cr3i043iQi5?617731曉溝軒HSP$_AfiMJ.HTEA_RAT_HAfOOv￡A_R$Ponteanaihsp$_majh->aam200^04-03104&1057817731U9P3OIE)RRM.HSPS.PHYCH-fiECONFlE_REq1NTERNAIRRM->!H5PS_MAINam他5?e17731聲3miIMF0RMATI0NMES-SAGEA3HSP$^0AM$20?M-031QmO5?9177*31BK2JMSPSfUE)RRM^HSPS^PHYCHJECONFl見REQINTERNERRM寸H5PS.MA1時JWWJ-03104810157917731MSPSIUEIrac_iubc_rl_add_reqmTEAMAlRAC->IUBCLDT跟蹤情況RELOCATIONPREPARATIONFAILURE中攜帶的原因為Unknown-Target-RNC。截圖如下：IU2022UU館RMHCMEAEREPORTINDMSl眾gelYrtf＞互操作切換失敗原1因20?&*031Q4?104381773120的犠ID436廿掙2MB3O010(4610553177312DO^M031.D4￡1055E177312W鄧國卻報10M917Z31200筑MS卻4410舁517731犠ID57S1773120的厲曲值価山S?E177312HB4403104^1057E1773120094403104￡1057B17731加映MK1Q報105761773120C珈心1Q備W57917F312tX&^031Q?tl057917731HSPSDUEJHSPSfUE]HSPSfUEJH5PS(UE)H?PS(UE]H$PS(UE]H5PSIUE]H^PSOUE]HSPSfUElHSPSmH虧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$_l^INIERHAJRAC'XUBCRHC->CHTFSS^HSPSU￡->RHC切換失敗原因截圖軟交換局GZS36的互操作路由關系補全后，于4月22日進行了復測，現(xiàn)場測試能夠從TD小區(qū)廣州長腰嶺村1互操作切換到GSM小區(qū)長腰嶺村1。測試截圖如下:TDServering/Neighbor-G105長展嶺路段_23G互操.…lessage-GID石長區(qū)嶺???UARfCN|CF「IRSCPldBmj3訥RSSIIpB創(chuàng)FPth5闊在；]|5$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廣州長腰鹼村應急