VoLTE基本流程与信令解析1VoLTE呼叫业务流程AS服务器S-GWeNBCallerA(UE)CalleeB(UE)P-GWMMEMME释放信令连接,用户A进入IDLE模式MME释放信令连接,用户B进入IDLE模式17)InitialUeMessage(ServiceRequest)23)UplinkDataTransfer(100Trying)UserPlaneSetup功能:A和B均在IDLE模式,A用户(主叫Caller)呼叫B用户(被叫Callee)流程图预置条件:A、B均已在MME附着,已在AS服务器注册。备注:黑色,正常消息描述,包括Rrc、S1信令和普通描述等红色,NAS标准信令蓝色,SIP标准信令A发起呼叫IDLE模式,先将数据缓存,信令跑通后发送数据4)InitialUeMessage(ServiceRequest)UserPlaneSetup5)InitialContextSetupRequestRadioBearerEstablishment重配完成后上行数据即可发送1)RRCConnectionRequest2)RrcConnectionSetup3)RrcConnectionSetupComplete(ServiceRequest)6)RrcConnectionReconfiguration7)RrcConnectionReconfigutarionComplete8)InitialContextSetupResponse9)UplinkDataTransfer(INVITE)11)DownlinkDataTransfer(INVITE)13)Paging12)DownlinkDataNotification14)RRCConnectionRequest15)RrcConnectionSetup16)RrcConnectionSetupComplete(ServiceRequest)18)InitialContextSetupRequestRadioBearerEstablishment19)RrcConnectionReconfiguration20)RrcConnectionReconfigutarionComplete21)InitialContextSetupResponse22)DownLinkDataTransfer(INVITE)10)DownLinkDataTransfer(100Trying)SIP正常信令和数据流程,见A呼叫B(SIP流程)VoLTE基本流程与信令解析2VoLTE呼叫业务流程AS服务器S-GWeNBCallerA(UE)CalleeB(UE)P-GWMMEMME释放信令连接,用户A进入IDLE模式MME释放信令连接,用户B进入IDLE模式17)InitialUeMessage(ServiceRequest)23)UplinkDataTransfer(100Trying)UserPlaneSetup功能:A和B均在IDLE模式,A用户(主叫Caller)呼叫B用户(被叫Callee)流程图预置条件:A、B均已在MME附着,已在AS服务器注册。备注:黑色,正常消息描述,包括Rrc、S1信令和普通描述等红色,NAS标准信令蓝色,SIP标准信令A发起呼叫IDLE模式,先将数据缓存,信令跑通后发送数据4)InitialUeMessage(ServiceRequest)UserPlaneSetup5)InitialContextSetupRequestRadioBearerEstablishment重配完成后上行数据即可发送1)RRCConnectionRequest2)RrcConnectionSetup3)RrcConnectionSetupComplete(ServiceRequest)6)RrcConnectionReconfiguration7)RrcConnectionReconfigutarionComplete8)InitialContextSetupResponse9)UplinkDataTransfer(INVITE)11)DownlinkDataTransfer(INVITE)13)Paging12)DownlinkDataNotification14)RRCConnectionRequest15)RrcConnectionSetup16)RrcConnectionSetupComplete(ServiceRequest)18)InitialContextSetupRequestRadioBearerEstablishment19)RrcConnectionReconfiguration20)RrcConnectionReconfigutarionComplete21)InitialContextSetupResponse22)DownLinkDataTransfer(INVITE)10)DownLinkDataTransfer(100Trying)SIP正常信令和数据流程,见A呼叫B(SIP流程)AS服务器S-GWeNBCallerA(UE)CalleeB(UE)P-GWMMEMME释放信令连接,用户A进入IDLE模式MME释放信令连接,用户B进入IDLE模式17)InitialUeMessage(ServiceRequest)23)UplinkDataTransfer(100Trying)UserPlaneSetup功能:A和B均在IDLE模式,A用户(主叫Caller)呼叫B用户(被叫Callee)流程图预置条件:A、B均已在MME附着,已在AS服务器注册。备注:黑色,正常消息描述,包括Rrc、S1信令和普通描述等红色,NAS标准信令蓝色,SIP标准信令A发起呼叫IDLE模式,先将数据缓存,信令跑通后发送数据4)InitialUeMessage(ServiceRequest)UserPlaneSetup5)InitialContextSetupRequestRadioBearerEstablishment重配完成后上行数据即可发送1)RRCConnectionRequest2)RrcConnectionSetup3)RrcConnectionSetupComplete(ServiceRequest)6)RrcConnectionReconfiguration7)RrcConnectionReconfigutarionComplete8)InitialContextSetupResponse9)UplinkDataTransfer(INVITE)11)DownlinkDataTransfer(INVITE)13)Paging12)DownlinkDataNotification14)RRCConnectionRequest15)RrcConnectionSetup16)RrcConnectionSetupComplete(ServiceRequest)18)InitialContextSetupRequestRadioBearerEstablishment19)RrcConnectionReconfiguration20)RrcConnectionReconfigutarionComplete21)InitialContextSetupResponse22)DownLinkDataTransfer(INVITE)10)DownLinkDataTransfer(100Trying)SIP正常信令和数据流程,见A呼叫B(SIP流程)VoLTE基本流程与信令解析3VoLTE呼叫业务流程AS服务器S-GWeNBCallerA(UE)CalleeB(UE)P-GWMMEMME释放信令连接,用户A进入IDLE模式MME释放信令连接,用户B进入IDLE模式17)InitialUeMessage(ServiceRequest)23)UplinkDataTransfer(100Trying)UserPlaneSetup功能:A和B均在IDLE模式,A用户(主叫Caller)呼叫B用户(被叫Callee)流程图预置条件:A、B均已在MME附着,已在AS服务器注册。备注:黑色,正常消息描述,包括Rrc、S1信令和普通描述等红色,NAS标准信令蓝色,SIP标准信令A发起呼叫IDLE模式,先将数据缓存,信令跑通后发送数据4)InitialUeMessage(ServiceRequest)UserPlaneSetup5)InitialContextSetupRequestRadioBearerEstablishment重配完成后上行数据即可发送1)RRCConnectionRequest2)RrcConnectionSetup3)RrcConnectionSetupComplete(ServiceRequest)6)RrcConnectionReconfiguration7)RrcConnectionReconfigutarionComplete8)InitialContextSetupResponse9)UplinkDataTransfer(INVITE)11)DownlinkDataTransfer(INVITE)13)Paging12)DownlinkDataNotification14)RRCConnectionRequest15)RrcConnectionSetup16)RrcConnectionSetupComplete(ServiceRequest)18)InitialContextSetupRequestRadioBearerEstablishment19)RrcConnectionReconfiguration20)RrcConnectionReconfigutarionComplete21)InitialContextSetupResponse22)DownLinkDataTransfer(INVITE)10)DownLinkDataTransfer(100Trying)SIP正常信令和数据流程,见A呼叫B(SIP流程)AS服务器S-GWeNBCallerA(UE)CalleeB(UE)P-GWMMEMME释放信令连接,用户A进入IDLE模式MME释放信令连接,用户B进入IDLE模式17)InitialUeMessage(ServiceRequest)23)UplinkDataTransfer(100Trying)UserPlaneSetup功能:A和B均在IDLE模式,A用户(主叫Caller)呼叫B用户(被叫Callee)流程图预置条件:A、B均已在MME附着,已在AS服务器注册。备注:黑色,正常消息描述,包括Rrc、S1信令和普通描述等红色,NAS标准信令蓝色,SIP标准信令A发起呼叫IDLE模式,先将数据缓存,信令跑通后发送数据4)InitialUeMessage(ServiceRequest)UserPlaneSetup5)InitialContextSetupRequestRadioBearerEstablishment重配完成后上行数据即可发送1)RRCConnectionRequest2)RrcConnectionSetup3)RrcConnectionSetupComplete(ServiceRequest)6)RrcConnectionReconfiguration7)RrcConnectionReconfigutarionComplete8)InitialContextSetupResponse9)UplinkDataTransfer(INVITE)11)DownlinkDataTransfer(INVITE)13)Paging12)DownlinkDataNotification14)RRCConnectionRequest15)RrcConnectionSetup16)RrcConnectionSetupComp