EPC 移动性管理附着流程故障处理.ppt

修订记录 本页不打印 EPC移动性管理附着流程故障处理 MME 参考资料 3GPP234013GPP24301 MM SM 3GPP29272 S6a 培训目标 学完本课程后 您应该能 掌握附着流程在MME内的深入处理机制掌握信令类故障处理的方法和思路掌握附着流程的高级故障处理 目录 附着流程故障处理背景知识附着流程故障分析处理 目录 附着流程故障处理背景知识附着流程故障分析处理 目录 附着流程故障处理背景知识1 1附着流程介绍1 2MME内部处理机制1 3附着流程故障处理思路 AttachwithIMSIin4G UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AccessControlbyMMElicense dataconfiguration AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse CreateSessionRequest AuthenticationRequest CreateSessionResponse InitialContextSetupRequest AttachAccept Directtransfer AttachComplete RRCConnectionReconfiguration Attachaccept InitialContextSetupResponse UpdateLocationRequest UpdateLocationAnswer AccessControlbySubscribedata 接入控制 安全流程 位置更新 缺省承载创建 CreateSessionRequest CreateSessionResponse ModifyBearerRequest ModifyBearerResponse RRCConnectionReconfigurationComplete 目录 附着流程故障处理背景知识1 1附着流程介绍1 2MME内部处理机制1 3附着流程故障处理思路 接入控制内部处理过程 Attachrequest HPLMN ConnectPLMN N Y Y N Y AccesscontrolbyIMSI N IMSIHSS DMPE Defaultcause EPSservicesnotallowedinthisPLMN可以通过SETEMMPROCTRL自定义 Defaultcause EPSservicesnotallowedControlledbycommandADDS1ACCAREALST RegionalRoamingRestriction ADDS1ACCAREALST License ResourceLimit Y NoresponsefromMME N 鉴权流程内部处理过程 Authenticationsetresponse AccesscontrolbyIMSI N Authenticationsetrequest Y IMSIHSS DMPE N Y Protocolerror unspecified 可以通过SETEMMPROCTRL自定义 Networkfailure 17 可以通过SETEMMPROCTRL自定义 DIAMETER ERROR USER UNKNOWN EPSservicesandnon EPSservicesnotallowed 8 可配置 WrongK OP IllegalUE 3 UnknownsubsinHLR Authenticationfailure N Authenticationrequest response NoresponsefromUE IllegalUE 3 Authenticationfailure NoresponseformHLR Networkfailure 17 可以通过SETEMMPROCTRL自定义 IllegalUE IllegalUE 3 Authenticationfailure DIAMETERERRORUNKNOWNEPSSUBSCRIPTION EPSSubsUnknown Nosuitablecellsintrackingarea 15 可配置 位置更新内部处理过程 Updatelocation DIAMETER ERROR USER UNKNOWN EPSservicesandnon EPSservicesnotallowed 8 可配置 DIAMETERERRORUNKNOWNEPSSUBSCRIPTION EPSSubsUnknown Accesscontrolbysubscribeddata Zonecoderestrict PLMNnotallowed 11 可配置 Roamingnotallowed ARDrestrict EPSservicesnotallowed 7 可通过ADDS1ARD配置 RestrictaccordingtoAPNNI DIAMETER ERROR ROAMING NOT ALLOWED Nosuitablecellsintrackingarea 15 OrRoamingnotallowedinthistrackingarea 13 Unknownsubs DIAMETER ERROR RAT NOT ALLOWED RATnotallowed Nosuitablecellsintrackingarea 15 可配置 EPSservicesnotallowed 7 可通过ADDS1ARD配置 Authenticationrequest response Nosuitablecellsintrackingarea 15 可配置 缺省承载建立内部处理过程 DefaultBearerCreation DefaultBearerCreatingFailed ESMfailur 19 其他因素导致的承载激活失败 终端无应答ACTIVATEDEFAULTEPSBEARERCONTEXTACCEPT AttachComplete DefaultBearerCreatingFailed ESMfailur 19 Accesscontrolbysubscribeddata 原因值 PLMN配置 S6a接口故障 SETEMMPROCTRL在用户接入S1模式时 USN9810可通过该命令控制MM流程进行特殊处理以及特殊场景下指定的原因值下发 以满足运营商实现对现网设备兼容性特殊控制的需求 CauseValue RegionalRoamingRestriction ADDS1ACCAREALST区域漫游限制用户 可以限制特定的用户在特定的跟踪区内的接接入策略及拒绝原因值的配置 CauseValue Accesscontrolbysubscribeddata ADDS1ARD可以配置是否拒绝终端的原因值 接入控制原因值 目录 附着流程故障处理背景知识1 1附着流程介绍1 2MME内部处理机制1 3附着流程故障处理思路 附着流程故障分析思路 附着流程的故障分析思路如下 1 确定网元范围 2 确定故障影响范围 初步定位故障点 所有用户附着失败部分用户附着失败个别用户附着失败3 确定流程中的故障点 B3FA 确定相关网元 确定故障范围 确定流程中的故障点 B3FA分析方法 目录 附着流程故障处理背景知识附着流程故障分析处理 目录 附着流程故障分析处理2 1接口故障2 2接入故障2 3安全流程故障2 4位置更新故障2 5缺省承载建立故障 接口故障 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI X 接口故障 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI X 接口故障分析思路 根据信令跟踪 若看不到MS发起的 AttachRequest 消息 表明S1接口出现故障 接口故障按照协议栈从下到上逐步排查 S1 AP SCTP IP L2 L1 S1 AP SCTP IP L2 L1 eNodeB MME S1 MME 接口故障 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI X 目录 附着流程故障分析处理2 1接口故障2 2接入故障2 3安全流程故障2 4位置更新故障2 5缺省承载建立故障 接入故障案例1 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause EPSservicesnotallowedinthisPLMN 14 ControlbycommandSETEMMPROCTRL 接入故障案例1 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause EPSservicesnotallowedinthisPLMN 14 ControlbycommandSETEMMPROCTRL 接入故障案例1 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause EPSservicesnotallowedinthisPLMN 14 接入故障案例1 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause EPSservicesnotallowedinthisPLMN 14 ControlbycommandSETEMMPROCTRL 1 NoconfigurationinADDHPLMN ADDCONNCECTPLMN 接入故障案例2 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI X 接入故障案例2 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI X 接入故障案例2 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI X 接入故障案例2 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI X 1 4GUsernumberreachesthelicenselimitation sumofMaximumnumberof4Gsubscribers 2 Usercongestion 接入故障案例3 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause EPSservicesnotallowed 7 ControlbycommandADDS1ACCAREALST 接入故障案例3 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause EPSservicesnotallowed 7 ControlbycommandADDS1ACCAREALST 接入故障案例3 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause EPSservicesnotallowed 7 ControlbycommandADDS1ACCAREALST 接入故障案例3 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause EPSservicesnotallowed 7 ControlbycommandADDS1ACCAREALST 1 RoamingrestrictedaccordingtoIMSIincommandADDS1ACCAREALST 接入故障总结 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject AttachReject Cause EPSservicesnotallowedinthisPLMN 14 ControlbycommandSETEMMPROCTRL HPLMN ConnectPLMN 1 NoconfigurationinADDHPLMN ADDCONNCECTPLMN 1 4GUsernumberreachesthelicenselimitation sumofMaximumnumberof4Gsubscribers 2 Usercongestion AttachRequest withIMSI X License ResourceLimit AttachRequest withIMSI AccessControlbyIMSI 1 RoamingrestrictedaccordingtoIMSIincommandADDS1ACCAREALST Cause EPSservicesnotallowed 7 ControlbycommandADDS1ACCAREALST 目录 附着流程故障分析处理2 1接口故障2 2接入故障2 3安全流程故障2 4位置更新故障2 5缺省承载建立故障 目录 附着流程故障分析处理2 3安全流程故障2 3 1取鉴权集流程故障2 3 2鉴权流程故障 取鉴权集流程故障案例1 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject HPLMN ConnectPLMN License ResourceLimit AccessControlbyIMSI Cause Protocolerror unspecified 111 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例1 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject HPLMN ConnectPLMN License ResourceLimit AccessControlbyIMSI Cause Protocolerror unspecified 111 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例1 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject HPLMN ConnectPLMN License ResourceLimit AccessControlbyIMSI Cause Protocolerror unspecified 111 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例1 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject HPLMN ConnectPLMN License ResourceLimit AccessControlbyIMSI Cause Protocolerror unspecified 111 ControlbycommandSETEMMPROCTRL 1 NoconfigurationinADDIMSIHSS ADDDMPE 取鉴权集流程故障案例2 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例2 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例2 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例2 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL 1 S6ainterfacefailure 取鉴权集流程故障案例3 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例3 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例3 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL AuthenticationInformationResponse X X X t 取鉴权集流程故障案例3 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL NoresponsefromHSS 取鉴权集流程故障案例4 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AttachReject Cause EPSservicesandnon EPSservicesnotallowed 8 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例4 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AttachReject Cause EPSservicesandnon EPSservicesnotallowed 8 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例4 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AttachReject Cause EPSservicesandnon EPSservicesnotallowed 8 ControlbycommandSETEMMPROCTRL ResponsefromHSS DIAMETER ERROR USER UNKNOWN 取鉴权集流程故障案例4 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AttachReject Cause EPSservicesandnon EPSservicesnotallowed 8 ControlbycommandSETEMMPROCTRL ResponsefromHSS DIAMETER ERROR USER UNKNOWN 取鉴权集流程故障案例5 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AttachReject Cause Nosuitablecellsintrackingarea 15 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例5 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AttachReject Cause Nosuitablecellsintrackingarea 15 ControlbycommandSETEMMPROCTRL 取鉴权集流程故障案例5 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AttachReject Cause Nosuitablecellsintrackingarea 15 ControlbycommandSETEMMPROCTRL ResponsefromHSS DIAMETER ERROR UNKNOWN EPS SUBSCRIPTION 取鉴权集流程故障案例5 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AttachReject Cause Nosuitablecellsintrackingarea 15 ControlbycommandSETEMMPROCTRL ResponsefromHSS DIAMETER ERROR UNKNOWN EPS SUBSCRIPTION 取鉴权集流程故障总结 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse NoresponsefromHSS Cause Protocolerror unspecified 111 ControlbycommandSETEMMPROCTRL 1 NoconfigurationinADDIMSIHSS ADDDMPE AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL 1 S6ainterfacefailure AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL t AttachReject Cause EPSservicesandnon EPSservicesnotallowed 8 ControlbycommandSETEMMPROCTRL ResponsefromHSS DIAMETER ERROR USER UNKNOWN AttachReject Cause Nosuitablecellsintrackingarea 15 ControlbycommandSETEMMPROCTRL ResponsefromHSS DIAMETER ERROR UNKNOWN EPS SUBSCRIPTION 目录 附着流程故障分析处理2 3安全流程故障2 3 1取鉴权集流程故障2 3 2鉴权流程故障 鉴权流程故障案例6 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause Protocolerror unspecified 111 鉴权流程故障案例6 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause Protocolerror unspecified 111 鉴权流程故障案例6 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause Protocolerror unspecified 111 X T3460 X X AuthenticationResponse AuthenticationRequest AuthenticationRequest N3460 IllegalUE 鉴权流程故障案例6 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause Protocolerror unspecified 111 NoauthenticationresponsefromUE 鉴权流程故障案例7 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause illegalUE 3 AuthenticationFailure AuthenticationReject 鉴权流程故障案例7 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause illegalUE 3 AuthenticationFailure AuthenticationReject 鉴权流程故障案例7 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause illegalUE 3 AuthenticationFailure Cause MACfailure AuthenticationReject IllegalUE 鉴权流程故障案例7 分析思路 GenerationofauthenticationvectorsinHSS UserauthenticationfunctionintheUSIM 鉴权流程故障案例7 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause illegalUE 3 AuthenticationFailure AuthenticationReject AuthenticationandCipheringFailurefromUEwithcause MACFailure 鉴权流程故障案例8 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause illegalUE 3 AuthenticationResponse AuthenticationReject 鉴权流程故障案例8 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause illegalUE 3 AuthenticationResponse AuthenticationReject 鉴权流程故障案例8 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause illegalUE 3 AuthenticationResponse AuthenticationReject IllegalUE 鉴权流程故障案例8 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest1 AuthenticationInformationRequest AuthenticationInformationResponse AttachReject Cause illegalUE 3 AuthenticationResponse RES1 AuthenticationReject AuthenticationRequest RAND1 AttachRequest2 AuthenticationRequest RAND1 AuthenticationRequest RAND2 RAND1 XRES1 RAND2 XRES2 拥塞 拥塞 RES1 XRES2 鉴权流程故障案例8 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause illegalUE 3 AuthenticationResponse AuthenticationReject AuthenticationandCipheringResponsefromUEwithincorrectRES 鉴权流程故障总结 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationRequest AttachReject Cause Protocolerror unspecified 111 NoauthenticationresponsefromUE AttachReject Cause illegalUE 3 AuthenticationReject AuthenticationFailure AuthenticationandCipheringFailurefromUEwithcause MACFailure AttachReject Cause illegalUE 3 AuthenticationResponse AuthenticationReject AuthenticationandCipheringResponsefromUEwithincorrectRES 目录 附着流程故障分析处理2 1接口故障2 2接入故障2 3安全流程故障2 4位置更新故障2 5缺省承载建立故障 目录 附着流程故障分析处理2 4位置更新流程故障2 4 1位置更新流程故障2 4 2签约数据接入控制 位置更新故障案例1 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest AttachReject Cause Protocolerror unspecified 111 ControlbycommandSETEMMPROCTRL 位置更新故障案例1 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest AttachReject Cause Protocolerror unspecified 111 ControlbycommandSETEMMPROCTRL 1 NoconfigurationinADDIMSIHSS ADDDMPE 位置更新故障案例2 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL 位置更新故障案例2 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL 1 S6ainterfacefailure 位置更新故障案例3 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest UpdateLocationRequest AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL 位置更新故障案例3 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest UpdateLocationRequest AttachReject Cause Cause Networkfailure 17 ControlbycommandSETEMMPROCTRL NoresponsefromHSS 位置更新故障案例4 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest UpdateLocationRequest UpdateLocationAnswer Cause EPSservicesandnon EPSservicesnotallowed 8 ControlbycommandSETEMMPROCTRL AttachReject 位置更新故障案例4 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest UpdateLocationRequest UpdateLocationAnswer Cause EPSservicesandnon EPSservicesnotallowed 8 ControlbycommandSETEMMPROCTRL AttachReject 位置更新故障案例4 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest UpdateLocationRequest UpdateLocationAnswer Cause EPSservicesandnon EPSservicesnotallowed 8 ControlbycommandSETEMMPROCTRL ResponsefromHSS DIAMETER ERROR USER UNKNOWN AttachReject 位置更新故障案例4 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest UpdateLocationRequest UpdateLocationAnswer Cause EPSservicesandnon EPSservicesnotallowed 8 ControlbycommandSETEMMPROCTRL ResponsefromHSS DIAMETER ERROR USER UNKNOWN AttachReject 位置更新故障案例5 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest UpdateLocationRequest UpdateLocationAnswer Cause Nosuitablecellsintrackingarea 15 ControlbycommandSETEMMPROCTRL AttachReject 位置更新故障案例5 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationInformationResponse AuthenticationResponse AuthenticationRequest UpdateLocationRequest UpdateLocationAnswer Cause Nosuitablecellsintrackingarea 15 ControlbycommandSETEMMPROCTRL AttachReject 位置更新故障案例5 分析思路 UE eNodeB MME SGW HSS PGW AttachRequest withIMSI AuthenticationInformationRequest AuthenticationIn