呼叫流程及信令

位置更新及呼叫流程位置更新操作(一)____位置更新仅涉及本VLRMSBSSMSCVLRUmBSSAPMAPABLocationupdatingrequest(位置更新类型,CKSNo,LAIo,IMSI/TMSI)COMPLETEL3INFORMATION(Layer3信息)Updatelocationarea(CKSN,LAIo,LAIn,IMSI/TMSI)Authentication(RAND,CKSNn)Authenticationrequest(RAND,CKSNn)Authenticationresponse(SRES)Authenticationresponse(SRES)Setcypheringmode(Kc和算法标识符或不进行编码的指示)ForwardnewTMSI(TMSI)Updatelocationareaack.(HLR号)CYPHERMODECOMMAND(Kc,L3头部消息)CYPHERMODECOMPLETELocationupdatingaccept(TMSIn,LAIn)TMSIreallocationcompleteCLEARCOMMAND(资源释放)CLEARCOMPLETETMSIacknowledge(cause,L3头部消息)2.1.2位置更新操作(二)____位置更新涉及本VLR和HLR(当MS进入新的VLR或MS首次登录,或相关网络数据丢失后,MS都使用IMSI来标识自己)MSBSSMSCVLRHLR/AUCLocatingupdatingrequest(IMSI)UmBSSAPMAPMAPABDCOMPLETEL3INFO.Updatelocationarea(IMSI)Sendparameters(IMSI)Authenticationparameters(RAND/SRES/Kc,IMSI)AuthenticateAuthenticationrequestAuthenticationresponseAuthenticationresponseUpdatelocationInsertesubscriberdataSubscriberdatainsertionack.cancellocationcancellocationack.PVLRUpdatelocationack.(HLR号)SetcypheringmodeForwardnewTMSIUpdatelocationareaack.CYPHERMODECOMMANDCYPHERMODECOMPLETELocationupdatingaccepteTMSIreallocationcompleteTMSIacknowledgeCLEARCOMMANDCLEARCOMPLETE先前的VLR从正在单中删除相关的MS数据拜访本VLR的MS名3.1.1呼叫接续信号流程____移动用户呼叫移动用户(主被叫MS在同一MSC内)(一)UmABDAUmMSaBSSaMSCVLRHLRAUCBSSbMSb信道请求RACHSDCCHCMservicerequest(CKSN,IMSI/TMSI)COMPLETEL3INFO(包含CMservicereq.)CON_CONF(SCCP接续确认消息CC)Processaccessreq.(包含CMservicereq.)SendparametersAUT_INFO_REQ内部接口AUT_INFO_PROV(IMSI,RAND/SRES/Kc)(IMSI/TMSI)Authenticationpara.(IMSI,RAND/SRES/Kc)Authenticate(RAND,CKSNn)Authenticationrequest(RAND,CKSNn)Authenticationresponse(SRES)Authen.res.(SRES)SetcypheringmodeAccessreq.accepted(IMSI/MSISDN)CMserviceacceptCIPHERMODECOMMAND(Kc)CIPHERMODECOMPLETE呼叫建立Setup(被叫号码MSISDN)Sendinfo.foro/gcallsetup(包含serviceindication,callnumber)CompleteCall(包含所请求的呼叫处理信息)基本业务和补充业务CallproceedingASSIGNMENTREQUESTASSIGNMENTCOMPLETESendroutinginfo.(MSISDN,补充业务信息)Provideroamingnumber(IMSI)roamingnumberRoutinginfomationacknowledgesendinfo.fori/ccallsetuppageMS(LAI)PAGINGPageresponseCOMPLETEL3INFORMATION(包含Pageresponse)(内部过程)鉴权核对成功启动加密为来话发送消息,VLR将核对参数寻呼启动VLR核对IMSI分配MSRN3.1.2呼叫接续信号流程____移动用户呼叫移动用户(主被叫MS在同一MSC中)(二)UmABDAUmMSaBSSaMSCVLRHLRAUCBSSbMSb内部接口连接证实CON_CONF(SCCP接续确认消息CC)Processaccessreq.Sendpara.(IMSI/TMSI)AUT_INFO_REQAUT_INFO_PROVAuthen.para.(IMSI,RAND/SRES/Kc)(IMSI,RAND/SRES/Kc)Authenticate(RAND,CKSNn)Authenticationrequest(RAND,CKSNn)Authentication(SRES)Authenticationresponse(SRES)SetcypheringmodeAccessrequestacceptedCompletecallCIPHERMODECOMMAND(Kc)CIPHERMODECOMPLETE呼叫建立Setup呼叫证实CallconfirmedASSIGNMENTREQUESTASSIGNMENTCOMPLETE提醒Alerting连接Connect连接证实Connectacknowledge通话Alerting回铃音ConnectConnectacknowledge网路接续TCH振铃应答完成呼叫(回送被叫用户数据)3.1.3呼叫接续流程____挂机过程UmABDAUmMSaBSSaMSCVLRHLRAUCBSSbMSb(一)主叫先挂机断连Disconnect断连Disconnect释放Release释放Release释放完成Releasecomplete释放完成Releasecomplete清除命令CLEARCOMMMAND清除完成CLEARCOMPLETECLEARCOMMANDCLEARCOMPLETEMSC释放陆地信道和物理连接(二)被叫先挂机断连Disconnect断连Disconnect释放Release释放完成Releasecomplete清除命令CLEARCOMMAND清除完成CLEARCOMPLETE释放Release释放完成ReleasecompleteCLEARCOMMANDCLEARCOMPLETEMSC释放陆地信道和物理连接切换控制流程____同MSC内基站间切换MSCBSS1BSS2MSAAUmUmBSS1和MS间无线传输信号测量HANDOVERREQUIRED(目标小区表)切换请求HANDOVERREQUEST(PCM&Channeltype)切换确认HANDOVERREQUESTACKNOWLEDGE(参数L3信息携带了无线接口上的HANDOVERCOMMAND消息它包含NewTCH号切换参考号)切换命令HANDOVERCOMMAND(包含Targetchannel并携带了无线接口上HANDOVERCOMMAND消息)切换命令HANDOVERCOMMAND(包含NewTCH号和切换参考号)通过原BSS,让MS转到新的信道切换检测HANDOVERDETECT切换检测HANDOVERDETECT切换完成HANDOVERCOMPLETE切换完成HANDOVERCOMPLETEMS进入目标小区CLEARCOMMANDCLEARCOMPLETE释放资源释放PCM切换命令证实4.2.1切换控制流程____基本切换处理~~~~MSMSBSS1MSCaMSCbBSS2VLRb无线传输信号测量HANDOVERREQ.Performhandover(MAP)(全球目标小区表)(全球目标小区标识全球服务小区标识信道类型)HANDOVERREQUEST(PCM&Channeltype)HANDOVERREQUESTACKNOWLEDGE(包含NewTCH和切换参考号)Allocationhandovernumber(分配切换号码)Sendhandoverreport(HON.)(发送切换报告)Radiochannelack.(MAP)(包含NewTCH和HON.)无线信道证实IAMACMHANDOVERCOMMANDHANDOVERCMD经原BSS让MS转到新的信道切换检测HANDOVERDETECT切换完成HANDOVERCOMPLETEBSS2新选TCH连到PCM电路MS进入目标小区发送结束信号Sendendsignal(MAP)CLEARCOMMAND释放PCM0CLEARCOMPLETEANS释放(TUP/ISUP)Endsignal(MAP)结束信号拆去MSCa和MSCb的物理连接Handoverreport释放切换报告移动UmAEBAUm4.2.2切换控制流程____后续切换流程(MS离开MSCb漫游到MSCb')漫游EMSMSCaMSCbMSCb'VLRbVLRb'BSS2BSS2'无线传输信号测量HANDOVERREQUIRED(目标小区表)执行后续切换Performsubsequenthandover(MAP)(目标小区标识,服务小区标识,MSC号)执行切换Performhandover(目标小区标识,服务小区标识,信道类型)HANDOVERREQUEST(PCM&Channeltype)HANDOVERREQUESTACKNOWLEDGE(包含NewTCH号和切换号码)Allocatehandovernumber(分配切换号码)Sendhandoverreport(HON)(发送切换报告)Radiochannnelack.(MAP)(包含NewTCH号和HON.)无线信道证实IAMACM后续切换证实Subsequenthandoverack.HANDOVERCOMMAND切换命令切换检测HANDOVERDETECT切换完成HANDOVERCOMPLETE发送结束信号Sendendsignal(MAP)ANS结束信号Endsignal(MAP)释放切换报告Handoverreport释放HONCLEARCOMMANDCLEARCOMPLETE释放(TUP)拆去MSCa和MSCb的物理连接结束信号Endsignal(MAP)释放(TUP/ISUP)释放切换报告Handoverreport释放HON拆去MSCAa和MSCb'的物理连接~~~~MS附：消息说明DTAP消息移动管理MM消息消息名传递方向功能鉴权拒绝AuthenticationrejectToMS向MS指明鉴权已经失败鉴权请求AuthenticationrequestToMS网络启动MS鉴权鉴权响应AuthenticationresponseToNetwork将计算出的鉴权响应SERS传送到网络CM重建请求CMRe-establishmentrequestToNetwork若前一个连接失败,MS请求重建一个连接CM业务接受CMserviceacceptToMS网络向MS指明已经接受请求的业务CM业务拒绝CMservicerejectToMS网络向MS指明不能提