VoLTE呼叫SIP信令分析

1、文档名称文档密级VoLTE呼叫SIP信令分析   VoLTE主叫与网络侧交互流程1     INVITE   /*UE向网侧发起INVITE请求，是IMP被叫的号码，SIP/2.0是协议版本号*/INVITE ;user=phone SIP/2.0/*电话出的,*/

2、From: <sip:+8618813050064>tag=ccecbow /*被叫电话/To: "quot;<;user=phone>P-Preferred-Identity: <sip:+8618813050064>Contact: <sip:4606020130500640:5060>+sip.instance="<urn:gsma:im

3、ei:86527602-000237-4>"+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel"+g.3gpp.mid-call;+g.3gpp.srvcc-alerting;videoAccept-Contact: *;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel"Request-Disposition: fork/* E-UTRAN 表示4GTDD是TDD制式,现在支持TDD和FDD的4G通话*

4、/P-Access-Network-Info: 3GPP-E-UTRAN-TDD;utran-cell-id-3gpp="460600000000A06A"/*打开了precondition */Supported: 100rel,join,norefersub,precondition,replaces,timerAllow: INVITE,ACK,BYE,CANCEL,UPDATE,INFO,PRACK,SUBSCRIBE,NOTIFY,REFERSession-Expires: 1800Min-SE: 90Call-ID: bbecbowMm0

5、CSeq: 1 INVITE/*VoLTE呼叫经过的网络节点数最大值*/Max-Forwards: 70User-Agent: RCS-client/OMA1.0 HW-VxW/V1.0Via: SIP/2.0/UDP 0:5060;branch=z9hG4bKddecbowMmawMmxhaaGL2;rportContent-Type: application/sdpContent-Length: 833v=0o=vue 3202 0 IN IP4 0s=-c=IN IP4 0t=0 0m=audio 31004 RTP

6、/AVP 108 106 101 102/*AMB-WB 宽带，a开头的字段是详细解释有4种编码方式：宽带108窄带101宽带DTMF描述101宽带DTMF描述102*/a=rtpmap:108 AMR-WB/16000/1a=fmtp:108 mode-change-capability=2;max-red=0/*AMR就表示AMR-NB（窄带）*/a=rtpmap:106 AMR/8000/1a=fmtp:106 mode-change-capability=2;max-red=0a=rtpmap:101 telephone-event/16000a=fmtp:101 0-15a=rtpm

7、ap:102 telephone-event/8000a=fmtp:102 0-15/*表示1帧/20ms*/a=ptime:20/*表示1帧/240秒是个界限，网络侧不能低于这个速率*/a=maxptime:240/*SDP协商*/a=sendrecv/*curr：当前状态Precondition type：qosstatus type: local*/a=curr:qos local nonea=curr:qos remote none/*des：期望derection tag：sendrecv级别：optional，级别从低到高是none（资源没有），optional（资源可选），man

8、datory（资源一定要有）*/a=des:qos optional local sendrecva=des:qos optional remote sendrecv/*m开头的字段是多媒体信息描述*/m=video 37050 RTP/AVP 118 123a=rtpmap:118 H264/90000a=fmtp:118 profile-level-id=64E00D; max-br=640a=rtpmap:123 H264/90000a=fmtp:123 profile-level-id=42E00D; max-br=640a=sendrecva=curr:qos local nonea

9、=curr:qos remote nonea=des:qos optional local sendrecva=des:qos optional remote sendrecv2      100 Trying   /*网络侧回了100 Trying表示网络侧在尝试连接被叫*/SIP/2.0 100 TryingVia: SIP/2.0/UDP 0:5060;branch=z9hG4bKddecbowMmawMmxhaaGL2;rport=5060Call-ID: bbecbowMm192.

10、168.57.10From: <sip:+8618813050064>tag=ccecbowTo: "quot;<;user=phone>CSeq: 1 INVITEContent-Length: 0 3      183 Session Progress   /*网络侧回183表示网络侧在做资源预留，建立QCI5，QCI1等承载*/SIP/2.0 18

11、3 Session ProgressVia: SIP/2.0/UDP 0:5060;branch=z9hG4bKddecbowMmawMmxhaaGL2;rport=5060Call-ID: bbecbowMm0From: <sip:+8618813050064>tag=ccecbowTo: "quot;<;user=phone>tag=sbc080479mp79eeCSeq: 1 INVITE

12、Allow: INVITE,ACK,BYE,CANCEL,UPDATE,INFO,PRACK,SUBSCRIBE,NOTIFY,REFERContact: <sip:1:5060>Require: 100rel,preconditionServer: RCS-client/OMA1.0 HW-VxW/V1.0RSeq: 1Feature-Caps: *;+g.3gpp.srvcc;+g.3gpp.srvcc-alertingContent-Length: 689Content-Type: application/sdpv=0o=- 21401 21401 IN

13、IP4 0s=SBC callc=IN IP4 0t=0 0m=audio 48150 RTP/AVP 108 101a=rtpmap:108 AMR-WB/16000/1a=fmtp:108 mode-change-capability=2;max-red=0a=rtpmap:101 telephone-event/16000a=fmtp:101 0-15a=ptime:20a=maxptime:240/*SDP*/a=sendrecva=curr:qos local nonea=curr:qos remote nonea=des:qos mandat

14、ory local sendrecva=des:qos mandatory remote sendrecva=conf:qos remote sendrecvm=video 48152 RTP/AVP 118a=rtpmap:118 H264/90000a=fmtp:118 profile-level-id=64E00D;max-br=640a=sendrecva=curr:qos local nonea=curr:qos remote nonea=des:qos mandatory local sendrecva=des:qos mandatory remote sendrecva=conf

15、:qos remote sendrecv4      PRACK   /*PRACK UE等待网络预留资源分配*/PRACK sip:1:5060 SIP/2.0From: <sip:+8618813050064>tag=ccecbowTo: "quot;<;user=phone>tag=sbc080479mp79eeCall-ID: bbec

16、bowMm0CSeq: 2 PRACKMax-Forwards: 70User-Agent: RCS-client/OMA1.0 HW-VxW/V1.0Via: SIP/2.0/UDP 0:5060;branch=z9hG4bKaeecbowMmawMmxhaaqJ2;rportRAck: 1 1 INVITEContent-Length: 05      UPDATE   /*UE收到QCI=1等承载建立后就发UPDATEUE发UPDATE和UE收到PRACK 20

17、0 OK的顺序在不同场景下前后顺序会互换*/UPDATE sip:1:5060 SIP/2.0From: <sip:+8618813050064>tag=ccecbowTo: "quot;<;user=phone>tag=sbc080479mp79eeContact: <sip:4606020130500640:5060>P-Access-Network-Info: 3GPP-E-UTR

18、AN-TDD;utran-cell-id-3gpp="460600000000A06A"Supported: 100rel,join,norefersub,precondition,replaces,timerAllow: INVITE,ACK,BYE,CANCEL,UPDATE,INFO,PRACK,SUBSCRIBE,NOTIFY,REFERSession-Expires: 1800Min-SE: 90Call-ID: bbecbowMm0CSeq: 3 UPDATEMax-Forwards: 70User-Agent: RCS-client/O

19、MA1.0 HW-VxW/V1.0Via: SIP/2.0/UDP 0:5060;branch=z9hG4bKbfecbowMmawMmxhaayba;rportContent-Type: application/sdpContent-Length: 639v=0o=vue 3202 3202 IN IP4 0s=-c=IN IP4 0t=0 0m=audio 31004 RTP/AVP 108 101a=rtpmap:108 AMR-WB/16000/1a=fmtp:108 mode-change-capability=

20、2;max-red=0a=rtpmap:101 telephone-event/16000a=fmtp:101 0-15a=ptime:20a=maxptime:240a=sendrecva=curr:qos local sendrecva=curr:qos remote nonea=des:qos mandatory local sendrecva=des:qos mandatory remote sendrecvm=video 37050 RTP/AVP 118a=rtpmap:118 H264/90000a=fmtp:118 profile-level-id=64E00D; max-br

21、=640a=sendrecva=curr:qos local sendrecva=curr:qos remote nonea=des:qos mandatory local sendrecva=des:qos mandatory remote sendrecv 6      PRACK 200 OK   SIP/2.0 200 OKVia: SIP/2.0/UDP 0:5060;branch=z9hG4bKaeecbowMmawMmxhaaqJ2;rport=5060Call-ID

22、: bbecbowMm0From: <sip:+8618813050064>tag=ccecbowTo: "quot;<;user=phone>tag=sbc080479mp79eeCSeq: 2 PRACKServer: RCS-client/OMA1.0 HW-VxW/V1.0Content-Length: 07      200 OK  

23、60;SIP/2.0 200 OKVia: SIP/2.0/UDP 0:5060;branch=z9hG4bKbfecbowMmawMmxhaayba;rport=5060Call-ID: bbecbowMm0From: <sip:+8618813050064>tag=ccecbowTo: "quot;<;user=phone>tag=sbc080479mp79eeCSeq: 3 UPDATEA

24、llow: INVITE,ACK,BYE,CANCEL,UPDATE,INFO,PRACK,SUBSCRIBE,NOTIFY,REFERContact: <sip:1:5060>Server: RCS-client/OMA1.0 HW-VxW/V1.0Supported: 100rel,join,norefersub,precondition,replacesContent-Length: 649Content-Type: application/sdpv=0o=- 21401 21402 IN IP4 0s=SBC callc=IN IP4

25、 0t=0 0m=audio 48150 RTP/AVP 108 101/*最后使用的是宽带还是窄带要看整个流程的最后的SDP，这里看出协商后是宽带*/a=rtpmap:108 AMR-WB/16000/1a=fmtp:108 mode-change-capability=2;max-red=0a=rtpmap:101 telephone-event/16000a=fmtp:101 0-15a=ptime:20a=maxptime:240a=sendrecva=curr:qos local sendrecva=curr:qos remote sendrecva=des:qo

26、s mandatory local sendrecva=des:qos mandatory remote sendrecvm=video 48152 RTP/AVP 118a=rtpmap:118 H264/90000a=mtp:118 profile-level-id=64E00D;max-br=640a=sendrecva=curr:qos local sendrecva=curr:qos remote sendrecva=des:qos mandatory local sendrecva=des:qos mandatory remote sendrecv8  

27、0;   180 Ringing   /*被叫响铃后，网络侧给主叫发180Ringing*/SIP/2.0 180 RingingVia: SIP/2.0/UDP 0:5060;branch=z9hG4bKddecbowMmawMmxhaaGL2;rport=5060Call-ID: bbecbowMm0From: <sip:+8618813050064>tag=ccecbowTo: "quot;<sipms.mnc06

28、0.;user=phone>tag=sbc080479mp79eeCSeq: 1 INVITEAllow: INVITE,ACK,BYE,CANCEL,UPDATE,INFO,PRACK,SUBSCRIBE,NOTIFY,REFERContact: <sip:1:5060>Require: 100rel,preconditionServer: RCS-client/OMA1.0 HW-VxW/V1.0RSeq: 2Feature-Caps: *;+g.3gpp.srvcc;+g.3gpp.srvcc-alerti

29、ngContent-Length: 0 9      PRACK   /*UE侧收到183或180的信令后都会回PRACK*/PRACK sip:1:5060 SIP/2.0From: <sip:+8618813050064>tag=ccecbowTo: "quot;<;user=phone>tag=sbc080479mp79eeCa

30、ll-ID: bbecbowMm0CSeq: 4 PRACKMax-Forwards: 70User-Agent: RCS-client/OMA1.0 HW-VxW/V1.0Via: SIP/2.0/UDP 0:5060;branch=z9hG4bKcgecbowMmawMmxhaaOda;rportRAck: 2 1 INVITEContent-Length: 010  PRACK 200 OK   /*由于UPDATA已经协商完了，这里200 OK就没有SDP了*/SIP/2.0 200 OKVia:

31、SIP/2.0/UDP 0:5060;branch=z9hG4bKcgecbowMmawMmxhaaOda;rport=5060Call-ID: bbecbowMm0From: <sip:+8618813050064>tag=ccecbowTo: "quot;<;user=phone>tag=sbc080479mp79eeCSeq: 4 PRACKServer: RCS-client/OMA1.0 HW-VxW/V1.0Content-Length: 011  INVITE 200 OK   SIP/2.0 200 OKVia: SIP/2.0/UDP 0:5060;branch=z9hG4bKddecbowMmawMmxhaaGL2;rport=5060Call-ID: b