VoLTE基本呼叫流程

1、文档名称文档密级VoLTE基本呼叫流程1VoLTE 基本呼叫场景主被叫都是 VoLTE 用户，并且主被叫用户区分状态，分为4种场景1、 主叫是 Connect状态，被叫是 Connect状态2、 主叫是 Connect状态，被叫是 Idle 状态3、 主叫是 Idle状态，被叫是Connect状态4、 主叫是 Idle状态，被叫是Idle 状态VoLTE 呼叫建立流程详解语音专有承载的建立时刻是由IMS 的配置决定的。如果是在振铃（180ringring ）之后建立语音专有承载（即通常说的早振铃），呼叫时延会更短，用户感受会好一些，但是接通后要等一下才能听到声音，如果 QCI1 建立失败， 会

2、出现 “鬼振铃 ”；如果是在振铃 （ 180ringring ）之前建立语音专有承载（即通常说的晚振铃） ，呼叫时延会增长， 但是接通后马上能听到声音。2.1VoLTE 主被叫用户都是Connect 状态早振铃流程图：2020-2-29华为保密信息 ,未经授权禁止扩散第1 页, 共12 页文档名称文档密级CallereNodeBMMESGW+PGWUPCCIMSCalleeInvite主叫拨打被Invite叫，拨号100 Trying100 TryingInviteInvite100 Trying被叫振铃100 Trying180 Ringing180 Ringing180 Ringing18

3、0 RingingPRACKPRACKPRACKPRACK200 OK200 OK200 OK被叫按接听键200 OK200 OK with SDP200 OK with SDPAARRARAAACreate Bearer RequestE-RAB Setup RequestRAAActivate Dedicated EPS Bearer Context RequestE-RAB Setup ResponseActivate Dedicated EPS Bearer Context AcceptCreate Bearer ResponseCCRCCARARQCI=1 的语音专有承载资源分配成功

4、RAA主叫 QCI=1 的语音专有承载建立，流程和被叫的相同200 OK with SDP200 OK with SDPACKACKACKACK主被叫语音通话BYE通话完毕，被叫按挂机BYERARSTR指示会话终止Delete Bearer RequestSTARAAE-RAB Release CommandDeactivate EPS Bearer Context RequestE-RAB Release ResponseDeactivate EPS Bearer Context AcceptDelete Bearer ResponseBYEBYERTCP Sender Report通话结束

5、，主叫QCI=1 的语音专有承载资源释放，流程和被叫的QCI=1 的专有承载释放过程相同200 OK200 OK200 OK200 OK晚振铃流程图2020-2-29华为保密信息 ,未经授权禁止扩散第2 页, 共12 页文档名称文档密级CallereNodeBMMESGW+PGWUPCC主叫拨打被InviteInvite叫，拨号100 Trying100 TryingAARRARCreate Bearer RequestAAARAAE-RAB Setup RequestActivate Dedicated EPS Bearer Context RequestE-RAB Setup Respon

6、seActivate Dedicated EPS Bearer Context AcceptCreate Bearer ResponseCCRCCARARRAA被叫 QCI=1的语音专有承载建立，流程和主叫的相同InviteInvite100 Trying100 Trying180 Ringing180 Ringing180 RingingRingingPRACKPRACKPRACKPRACK200 OK200 OK200 OK200 OK200 OK with SDP200 OK with SDPAARRARUpdate Bearer RequestAAARAAModify EPS Bear

7、er Context RequestModify EPS Bearer Context AcceptUpdate Bearer Response主叫 QCI=1 的语音专有承载更新过程，流程和被叫的更新过程相同200 OK with SDP200 OK with SDPACKACKACKACK主被叫语音通话BYEBYESTRRARDelete Bearer RequestSTARAAE-RAB Release CommandDeactivate EPS Bearer Context RequestE-RAB Release ResponseDeactivate EPS Bearer Conte

8、xt AcceptDelete Bearer ResponseBYEBYERTCP Sender Report通话结束，主叫 QCI=1 的语音专有承载资源释放，流程和被叫的QCI=1 的专有承载释放过程相同200 OK200 OK200 OK200 OKIMSCalleeQCI=1 的语音专有承载资源分配成功被叫振铃被叫按接听键通话完毕，被叫按挂机指示会话终止2.2VoLTE 主叫用户 Connect 状态，被叫用户IDLE 状态早振铃流程图：2020-2-29华为保密信息 ,未经授权禁止扩散第3 页, 共12 页文档名称文档密级CallereNodeBMMESGW+PGWUPCCIMSCa

9、lleeInvite主叫拨打被Invite叫，拨号100 Trying100 TryingSBC把Invite 消息发给被叫侧的PGW ，PGW发送 DDN 给 MME ，触发寻呼被叫InviteDownlink DataNotificationDownlink DataSBC转给 PGW 的 Invite 对于 PGW 来讲就是用户报文PagingNotification ACKInviteService RequestInitial Context Setup RequestInitial Context Setup ResponseModify Bearer RequestModify

10、Bearer RequestModify Bearer ResponseModify Bearer ResponseInviteInvite100 Trying被叫振铃100 Trying180 Ringing180 Ringing180 Ringing180 RingingPRACKPRACKPRACKPRACK200 OK200 OK200 OK被叫按接听键200 OK200 OK with SDP200 OK with SDPAARRARCreate Bearer RequestAAAE-RAB Setup RequestRAAActivate Dedicated EPS Bearer

11、Context RequestE-RAB Setup ResponseCreate Bearer ResponseActivate Dedicated EPS Bearer Context AcceptCCRCCAQCI=1 的语音专有RAR承载资源分配成功RAA主叫 QCI=1 的语音专有承载建立，流程和被叫的相同200 OK with SDP200 OK with SDPACKACKACKACK主被叫语音通话BYEBYE通话完毕，被叫按挂机STR指示会话终止RARDelete Bearer RequestSTARAAE-RAB Release CommandDeactivate EPS B

12、earer Context RequestE-RAB Release ResponseDeactivate EPS Bearer Context AcceptDelete Bearer ResponseBYEBYERTCP Sender Report通话结束，主叫QCI=1的语音专有承载资源释放，流程和被叫的QCI=1 的专有承载释放过程相同200 OK200 OK200 OK200 OK晚振铃流程图2020-2-29华为保密信息 ,未经授权禁止扩散第4 页, 共12 页文档名称文档密级CallereNodeBMMESGW+PGWUPCCIMSCallee主叫拨打被InviteInvite叫，

13、拨号100 Trying100 TryingAARRARCreate Bearer RequestE-RAB Setup RequestActivate Dedicated EPS Bearer Context RequestE-RAB Setup ResponseActivate Dedicated EPS Bearer Context AcceptCreate Bearer ResponsePGW 收到 RAR 消息后发送CreateBearerRequest创建专有承载，MME 收到后发现被叫是IDLE 态，发 Paging 消息寻呼被叫Create Bearer RequestPagi

14、ngDownlink DataNotificationDownlink DataNotification ACKModify Bearer RequestModify Bearer RequestModify Bearer ResponseModify Bearer ResponseE-RAB Setup RequestE-RAB Setup ResponseCreate Bearer ResponseRingingPRACK200 OKUpdate Bearer RequestUpdate Bearer ResponseAAARAACCRCCARARRAAAARRARAAARAAInvite

15、InviteService RequestInitial Context Setup RequestInitial Context Setup ResponseInviteInviteActivate Dedicated EPS Bearer Context Request Activate Dedicated EPS Bearer Context AcceptCCRCCA100 Trying100 Trying180 RingingRingingRingingPRACKPRACKPRACK200 OKOKOK200 OK with SDP200 OK with SDPAARRARAAARAA

16、Modify EPS Bearer Context RequestModify EPS Bearer Context AcceptQCI=1 的语音专有承载资源分配成功被叫振铃被叫按接听键主叫 QCI=1 的语音专有承载更新过程，流程和被叫的更新过程相同200 OK with SDP200 OK with SDPACKACKACKACK主被叫语音通话BYE通话完毕，被叫按挂机BYESTR指示会话终止RARDelete Bearer RequestSTARAAE-RAB Release CommandDeactivate EPS Bearer Context RequestE-RAB Relea

17、se ResponseDeactivate EPS Bearer Context AcceptDelete Bearer ResponseBYEBYERTCP Sender Report通话结束，主叫QCI=1 的语音专有承载资源释放，流程和被叫的QCI=1 的专有承载释放过程相同200 OK200 OK200 OK200 OK2020-2-29华为保密信息 ,未经授权禁止扩散第5 页, 共12 页文档名称文档密级2.3VoLTE 主叫用户 IDLE 状态，被叫用户 Connect 状态2.3.1早振铃流程图：CallereNodeBInviteMMESGW+PGWUPCCIMSCallee主

18、叫拨打被叫，拨号，由于主叫是IDLE 状态， RRC 连接建立， ServiceRequest流程Service RequestInitial Context SetupRequestInitial Context SetupResponseModify Bearer RequestModify Bearer RequestInviteInviteModify Bearer ResponseModify Bearer Response100 Trying100 TryingInviteInvite100 Trying100 Trying被叫振铃180 Ringing180 Ringing180

19、 RingingRingingPRACKPRACKPRACKPRACK200 OK200 OK200 OK被叫按接听键200 OK200 OK with SDP200 OK with SDPAARRARAAACreate Bearer RequestRAAE-RAB Setup RequestActivate Dedicated EPS Bearer Context RequestE-RAB Setup ResponseActivate Dedicated EPS Bearer Context AcceptCreate Bearer ResponseCCRCCARARQCI=1 的语音专有承载

20、资源分配成功RAA主叫 QCI=1 的语音专有承载建立，流程和被叫的相同200 OK with SDP200 OK with SDPACKACKACKACK主被叫语音通话BYEBYE通话完毕，被叫按挂机STR指示会话终止RARDelete Bearer RequestSTARAAE-RAB Release CommandDeactivate EPS Bearer Context RequestE-RAB Release ResponseDeactivate EPS Bearer Context AcceptDelete Bearer ResponseBYEBYERTCP Sender Repo

21、rt通话结束，主叫QCI=1的语音专有承载资源释放，流程和被叫的QCI=1 的专有承载释放过程相同200 OK200 OK200 OK200 OK2020-2-29华为保密信息 ,未经授权禁止扩散第6 页, 共12 页文档名称文档密级晚振铃流程图CallerInvite主叫拨打被叫，拨号，由于主叫是IDLE 状态， RRC 连接建立， ServiceRequest 流程eNodeBMMESGW+PGWUPCCService RequestInitial Context SetupRequestInitial Context SetupResponseModify Bearer RequestM

22、odify Bearer RequestInviteModify Bearer ResponseModify Bearer ResponseInvite100 Trying100 TryingAARRARIMSCalleeCreate Bearer RequestAAARAAE-RAB Setup RequestActivate Dedicated EPS Bearer Context RequestE-RAB Setup ResponseActivate Dedicated EPS Bearer Context AcceptCreate Bearer ResponseCCRCCARARRAA

23、被叫 QCI=1的语音专有承载建立，流程和主叫的相同InviteInvite100 Trying100 Trying180 Ringing180 Ringing180 RingingRingingPRACKPRACKPRACKPRACK200 OK200 OK200 OK200 OK200 OK with SDP200 OK with SDPAARRARUpdate Bearer RequestAAARAAModify EPS Bearer Context RequestModify EPS Bearer Context AcceptUpdate Bearer Response主叫 QCI=1

24、 的语音专有承载更新过程，流程和被叫的更新过程相同200 OK with SDP200 OK with SDPACKACKACKACK主被叫语音通话BYEBYESTRRARDelete Bearer RequestSTARAAE-RAB Release CommandDeactivate EPS Bearer Context RequestE-RAB Release ResponseDeactivate EPS Bearer Context AcceptDelete Bearer ResponseBYEBYERTCP Sender Report通话结束，主叫 QCI=1 的语音专有承载资源释放

25、，流程和被叫的QCI=1 的专有承载释放过程相同200 OK200 OK200 OK200 OKQCI=1 的语音专有承载资源分配成功被叫振铃被叫按接听键通话完毕，被叫按挂机指示会话终止2020-2-29华为保密信息 ,未经授权禁止扩散第7 页, 共12 页文档名称文档密级2.4VoLTE 主被叫用户都是 IDLE 状态2.4.1早振铃流程图：2020-2-29华为保密信息 ,未经授权禁止扩散第8 页, 共12 页文档名称文档密级CallereNodeBInvite主叫拨打被叫，拨号，由于主叫是IDLE 状态，主叫通过 RRC 连接建立，Service Request流程进入 CONNECT状

26、态被叫处于 IDLE 状态，通过下行数据触发 Paging被叫，找到被叫并且进入CONNECT 状态MMESGW+PGWService RequestInitial Context SetupRequestInitial Context SetupResponseModify Bearer RequestModify Bearer RequestInviteModify Bearer ResponseModify Bearer Response100 TryingDownlink DataNotificationDownlink DataNotification ACKPagingModify

27、 Bearer RequestModify Bearer RequestModify Bearer ResponseModify Bearer ResponseRingingPRACK200 OKUPCCIMSCalleeInvite100 TryingInviteSBC转给 PGW 的 Invite 对于 PGW 来讲就是用户报文InviteService RequestInitial Context Setup RequestInitial Context Setup ResponseInviteInvite100 Trying被叫振铃100 Trying180 Ringing180 Ri

28、nging180 RingingPRACKPRACKPRACK200 OK200 OK200 OK被叫按接听键200 OK with SDP200 OK with SDPAARRARCreate Bearer RequestAAARAAE-RAB Setup RequestActivate Dedicated EPS Bearer Context RequestE-RAB Setup ResponseActivate Dedicated EPS Bearer Context AcceptCreate Bearer ResponseCCRCCAQCI=1 的语音专有RAR承载资源分配成功RAA主

29、叫 QCI=1 的语音专有承载建立，流程和被叫的相同200 OK with SDP200 OK with SDPACKACKACKACK主被叫语音通话BYE通话完毕，被叫按挂机BYESTR指示会话终止Delete Bearer RequestSTARAAE-RAB Release CommandDeactivate EPS Bearer Context RequestE-RAB Release ResponseDeactivate EPS Bearer Context AcceptDelete Bearer ResponseBYEBYERARRTCP Sender Report通话结束，主叫

30、QCI=1的语音专有承载资源释放，流程和被叫的QCI=1 的专有承载释放过程相同200 OK200 OK200 OK200 OK2020-2-29华为保密信息 ,未经授权禁止扩散第9 页, 共12 页文档名称文档密级晚振铃流程图2020-2-29华为保密信息 ,未经授权禁止扩散第 10 页, 共12 页文档名称文档密级CallerInvite主叫拨打被叫，拨号，由于主叫是IDLE 状态，主叫通过RRC 连接建立，Service Request流程进入 CONNECT状态eNodeBMMESGW+PGWUPCCIMSCalleeService RequestInitial Context Set

31、upRequestInitial Context SetupResponseModify Bearer RequestModify Bearer RequestInvite Modify Bearer ResponseInviteModify Bearer Response100 Trying100 TryingAARRARE-RAB Setup RequestActivate Dedicated EPS Bearer Context RequestE-RAB Setup ResponseActivate Dedicated EPS Bearer Context AcceptPagingPGW

32、 收到 RAR 消息后发送CreateBearerRequest创建专有承载，MME 收到后发现被叫是 IDLE 态，发Paging消息寻呼被叫，找到被叫并进入CONNECT 状态E-RAB Setup RequestE-RAB Setup Response180 RingingPRACK200 OKCreate Bearer RequestAAARAACreate Bearer ResponseCCRCCARARQCI=1 的语音专有承载资源分配成功RAARARAARAAACreate Bearer RequestRAAInviteDownlink DataNotificationDownlink DataNotification ACKService RequestInitial Context Setup RequestInitial Context Setup ResponseModify Bearer RequestModify Bearer RequestModify