湘潭交流材料volte信令流程

1、VoLTE呼叫信令及eSRVCC切换SIP协议介绍Kerry2015-08-31SIP协议培训SIP消息事件分类：发起会话和响应会话: InVIte:会话请求ACK：用于对Invite的赂应的确认 Cancel:用于取消请求（请求完成之前）Bye:正常结束会话，相当于 Register:Options:查询服务器能力disconnect响应消息事件1XX.-指临时响应，表示已收到请求消息，正在对其进行处理2XX:成功消息，相当于Ack/Sucs类3XX:重定向，表需要采取进一步动作，以完成该请求4:客户端错误，表示请求消息中含语法错误或SIP服务器不能完成对该消息的处理5xx:服务器端错误6x

2、x:全局错误，表示请求不能在作何SIP服务器上实现序号状态码消息功能1xx信息响应（呼叫进展响应）表示已经接收到请求消息，正在对其进行处理100试呼叫180181呼叫正转182排队2xx成功响应表示请求已经被成功接受、处理200OK3xx重定向响应表示需要采取进一步动作，以完成该请求300多重选择301迁移302临时迁移303见其它305使用380代换服务序号状态码消息功能4xx客户端出错,表示请求消息中包含语法错误或者SIP服务器不能完成对该请求消息的处理400错误请求401无权402要求付款403404没有发现405不允许的方法406不接受407要求权408请求超时410413请求实体太大

3、414请求URI太大415不支持的类型416不支持的URI方案420分机无人接听421要求转机423间隔太短480暂时无人接听481呼叫腿/事务不存在482相环探测483跳频太高484地址不完整485不清楚486线路忙487终止请求488此处不接受491代处理请求493难以辨认5xx服务器出错,表示SIP服务器故障不能完成对正确消息的处理501没实现的502无效网关503不提供此服务504服务器超时505SIP版本不支持513消息太长6xx,全局故障,表示请求不能在任何SIP服务器上实现600全忙603604都不存在606不接受IMSUE过程eNodeBMMEIMSSGW/PGWAttach

4、request PreambleRARRRC request RRC setupRRC complete (Attach request)Attach requestAuthentioncation requestAuthentioncation response(NAS) Security(NAS) Securitydd completeInitial UE context request(实际是在建立QCI=9, E-RABID）Securityd (RRC)(RRC) Securityd completeRRC reconfigurationRRC reconfiguration com

5、pleteInitial UE context responseAttach acceptActivate default EPS bearer context (QCI=9)Activate default EPS bearer context AcceptAttach completeIMSUE过程eNodeBIMSMMESGW/PGWPDN connectivity requestCreate sesrequestE-RAB setup request (QCI=5,ERAB-ID)RRC reconfigurationRRC reconfiguration completeE-RAB

6、setup response (QCI=5)Activiate default EPS bearer context request(QCI=5)Activiate default EPS bearer context Accept)IMS_SIP_register request.IMS_SIP_register OK 200此用户成功后发起了一次订阅服务,应该是可有可无的IMS_SIP_subscribe (订阅，与后面的Invite类似，创建一次订阅关系）IMS_SIP_subscribe 200IMS_SIP_Notify（告诉订阅者，其订阅的资源信息）IMS_SIP_Notify 2

7、00RRC release空闲态呼叫信令UE(主叫)(被叫) UEMMEeNodeBMMEIMSeNBRequest (IMS_SIP_invite)Service request Preamble过程RRC 过程Initial UE message (request)Initial UE context requestRRC重配RRC重配完成Initial UE Context responserequestTrying 100(临时回应call proceding)E-RAB setup request (QCI=1)RRC重配过程E-RAB setup response (QCI=1)A

8、ctivate dedicated EPS bearer context (QCI=1)Activate dedicated EPS bearer Accept类似Paging的信令Paging(TMSI)Service requestRRC过程 RRC重配XIMS_SIP_invite requestTrying 100 (临时回应call confirm)IMS_SIP_Invite 183(呼叫正在进行中)Modify E-RAB request (修改QCI=1相关参数)RRC重配E-RAB setup request (QCI=1)RRC重配RRC重配完成Modify E-RAB r

9、esponseE-RAB setup response主被叫均为空闲态的呼叫信令(被叫) UEMMEeNodeBMMEIMSUE(主叫)eNBModify EPS bearer requestModify EPS bearer AcceptActivate dedicated EPS bearer context(QCI=1)Activate dedicated EPS bearer AcceptIMS_SIP_Invite 183(准备就绪/接受邀请)IMS_SIP_PRACK(对收到183的对方地址进行回复）IMS_SIP_PRACK 200IMS_SIP_Update (更新会话的信息，

10、用于通话建立之前，而通话建立之后的更新用re-invite）IMS_SIP_update 200IMS_SIP_InviteIMS_SIP_InviteRinging 180 (Alerting)OK 200(Connect)IMS_SIP_ACK(ConnectAcknowledge)IMS_SIP_BYE request (disconnect)IMS_SIP_BYE OK 200DeActivate dedicated EPS bearer AcceptModify E-RAB requestRRC重配(去激活QCI1=DeActivate Delicated Bearer reques

11、t)RRC重配完成(去激活Accept)Modify E-RAB responseRRC release主被叫均为连接态呼叫信令(被叫) UEMMEeNodeBMMEIMSUE(主叫)eNBRequest (IMS_SIP_invite)Initial UE message (request)requestTrying 100(call proceding)Modify E-RAB request (QCI=1)RRC重配RRC重配完成Modify E-RAB response (QCI=1)Activate dedicated EPS bearer context (QCI=1) ，带宽52

12、kbpsActivate dedicated EPS bearer Accept类似Paging的信令IMS_SIP_invite requestTrying 100 (call confirm)IMS_SIP_Invite 183(准备就绪/接受邀请)Modify E-RAB request (修改QCI=1相关参数)带宽49kbps,带宽49kbps,Modify E-RAB request (QCI=1)RRC重配RRC重配完成RRC重配RRC重配完成Modify E-RAB response)Modify Bearer equestModify E-RAB responseModify

13、 Bearer accept主被叫均为连接态呼叫信令(被叫) UEMMEeNodeBMMEIMSUE(主叫)eNBActivate dedicated EPS bearer context (QCI=1)Activate dedicated EPS bearerAcceptIMS_SIP_Invite 183(准备就绪/接受邀请)IMS_SIP_PRACKIMS_SIP_PRACK 200IMS_SIP_UpdateIMS_SIP_update 200IMS_SIP_InviteIMS_SIP_InviteRinging 180(Alerting)OK 200(Connect)IMS_SIP_

14、ACK(ConnectAcknowledge)IMS_SIP_BYE request (disconnect)IMS_SIP_BYE OK 200DeActivate dedicated EPS bearer AcceptModify E-RAB requestRRC重配(去激活QCI1=DeActivate Delicated Bearer request)RRC重配完成(去激活Accept)Modify E-RAB responseRRC releaseeSRVCC切换到GSM的信令流程SGWMSCT-BSC/BTSMGWeNodeBUEMMEMeasurement ReportHandover requiredSRVS to CS requestPrepate Handover requestHandover requestactServBasedMobThr=false threshold2GeranQCI(1)Prepare handover request responsethreshold2GeranSRVS to CS responsedHandoverHamand切换到GSM网络SRVS to CS complete notificationSRVS to CS complete Acknowledgereleas