VoLTE呼叫SIP信令分析

目录

​​1 INVITE​​

​​2 100 Trying​​

​​3 183 Session Progress​​

​​4 PRACK​​

​​5 UPDATE​​

​​6 PRACK 200 OK​​

​​7 200 OK​​

​​8 180 Ringing​​

​​9 PRACK​​

​​10 PRACK 200 OK​​

​​11 INVITE 200 OK​​

​​12 ACK​​

---

1 INVITE

/**UE 向网侧发起 INVITE 请求，
sip:[e-mail] 是 IMPU
18801200325 是被叫的号码，SIP/2.0 是协议版本号*/
INVITE sip:[e-mail];user=phone
SIP/2.0
/**电话是 18813050064 呼出的,*/
From: <sip:[e-mail]>;tag=ccecbow
/**被叫电话是 18801200325*/
To:
"18801200325"<sip:[e-mail];user=phone>
P-Preferred-Identity: <sip:[e-mail]>
Contact:
<sip:460602013050064@192.168.57.10:5060>;+sip.instance="<urn:gsma:ime
i:86527602-000237-4>";+g.3gpp.icsi-ref="urn%%3Aurn-7%%3A3gpp-service.
ims.icsi.mmtel";+g.3gpp.mid-call;+g.3gpp.srvcc-alerting;video
Accept-Contact:
*;+g.3gpp.icsi-ref="urn%%3Aurn-7%%3A3gpp-service.ims.icsi.mmtel"
Request-Disposition: fork
/** E-UTRAN 表示 4G
TDD 是 TDD 制式,现在支持 TDD 和 FDD 的 4G 通话*/
P-Access-Network-Info:
3GPP-E-UTRAN-TDD;utran-cell-id-3gpp="460600000000A06A"
/**打开了 precondition */
Supported: 100rel,join,norefersub,precondition,replaces,timer
Allow: INVITE,ACK,BYE,CANCEL,UPDATE,INFO,PRACK,SUBSCRIBE,NOTIFY,REFER
Session-Expires: 1800
Min-SE: 90
Call-ID: bbecbowMm@192.168.57.10
CSeq: 1 INVITE
/**VoLTE 呼叫经过的网络节点数最大值*/
Max-Forwards: 70
User-Agent: RCS-client/OMA1.0 HW-VxW/V1.0
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKddecbowMmawMmxhaaGL2;rport
Content-Type: application/sdp
Content-Length: 833
v=0
o=vue 3202 0 IN IP4 192.168.57.10
s=-
c=IN IP4 192.168.57.10
t=0 0
m=audio 31004 RTP/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/16000/1
a=fmtp:108 mode-change-capability=2;max-red=0
/************************
AMR 就表示 AMR-NB（窄带）
********************/
a=rtpmap:106 AMR/8000/1
a=fmtp:106 mode-change-capability=2;max-red=0
a=rtpmap:101 telephone-event/16000
a=fmtp:101 0-15
a=rtpmap:102 telephone-event/8000
a=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：qos
status type: local
****************/
a=curr:qos local none
a=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），
mandatory（资源一定要有）
****************/
a=des:qos optional local sendrecv
a=des:qos optional remote sendrecv
/***************
m 开头的字段是多媒体信息描述
***************/
m=video 37050 RTP/AVP 118 123
a=rtpmap:118 H264/90000
a=fmtp:118 profile-level-id=64E00D; max-br=640
a=rtpmap:123 H264/90000
a=fmtp:123 profile-level-id=42E00D; max-br=640
a=sendrecv
a=curr:qos local none
a=curr:qos remote none
a=des:qos optional local sendrecv
a=des:qos optional remote sendrecv

2 100 Trying

/**网络侧回了 100 Trying 表示网络侧在尝试连接被叫
*/
SIP/2.0 100 Trying
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKddecbowMmawMmxhaaGL2;rport=5060
Call-ID: bbecbowMm@192.168.57.10
From: <sip:[e-mail]>;tag=ccecbow
To:
"18801200325"<sip:[e-mail];user=phone>
CSeq: 1 INVITE
Content-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/2.0 183 Session Progress
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKddecbowMmawMmxhaaGL2;rport=5060
Call-ID: bbecbowMm@192.168.57.10
From: <sip:[e-mail]>;tag=ccecbow
To:
"18801200325"<sip:[e-mail];user=phone>;tag=sbc080479mp79ee
CSeq: 1 INVITE
Allow: INVITE,ACK,BYE,CANCEL,UPDATE,INFO,PRACK,SUBSCRIBE,NOTIFY,REFER
Contact: <sip:72.10.10.51:5060>
Require: 100rel,precondition
Server: RCS-client/OMA1.0 HW-VxW/V1.0
RSeq: 1
Feature-Caps: *;+g.3gpp.srvcc;+g.3gpp.srvcc-alerting
Content-Length: 689
Content-Type: application/sdp
v=0
o=- 21401 21401 IN IP4 72.10.10.60
s=SBC call
c=IN IP4 72.10.10.60
t=0 0
m=audio 48150 RTP/AVP 108 101
a=rtpmap:108 AMR-WB/16000/1
a=fmtp:108 mode-change-capability=2;max-red=0
a=rtpmap:101 telephone-event/16000
a=fmtp:101 0-15
a=ptime:20
a=maxptime:240
/**SDP
*/
a=sendrecv
a=curr:qos local none
a=curr:qos remote none
a=des:qos mandatory local sendrecv
a=des:qos mandatory remote sendrecv
a=conf:qos remote sendrecv
m=video 48152 RTP/AVP 118
a=rtpmap:118 H264/90000
a=fmtp:118 profile-level-id=64E00D;max-br=640
a=sendrecv
a=curr:qos local none
a=curr:qos remote none
a=des:qos mandatory local sendrecv
a=des:qos mandatory remote sendrecv
a=conf:qos remote sendrecv

4 PRACK

/****************
PRACK UE 等待网络预留资源分配
****************/
PRACK sip:72.10.10.51:5060 SIP/2.0
From: <sip:[e-mail]>;tag=ccecbow
To:
"18801200325"<sip:[e-mail];user=phone>;tag=sbc080479mp79ee
Call-ID: bbecbowMm@192.168.57.10
CSeq: 2 PRACK
Max-Forwards: 70
User-Agent: RCS-client/OMA1.0 HW-VxW/V1.0
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKaeecbowMmawMmxhaaqJ2;rport
RAck: 1 1 INVITE
Content-Length: 0

5 UPDATE

/********************
UE收到QCI=1 等承载建立后就发UPDATE
UE发UPDATE和UE收到PRACK 200 OK的顺序在不同场景下前后顺序会互换
*********************/
UPDATE sip:72.10.10.51:5060 SIP/2.0
From: <sip:[e-mail]>;tag=ccecbow
To:
"18801200325"<sip:[e-mail];user=phone>;tag=sbc080479mp79ee
Contact: <sip:460602013050064@192.168.57.10:5060>
P-Access-Network-Info:
3GPP-E-UTRAN-TDD;utran-cell-id-3gpp="460600000000A06A"
Supported: 100rel,join,norefersub,precondition,replaces,timer
Allow: INVITE,ACK,BYE,CANCEL,UPDATE,INFO,PRACK,SUBSCRIBE,NOTIFY,REFER
Session-Expires: 1800
Min-SE: 90
Call-ID: bbecbowMm@192.168.57.10
CSeq: 3 UPDATE
Max-Forwards: 70
User-Agent: RCS-client/OMA1.0 HW-VxW/V1.0
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKbfecbowMmawMmxhaayba;rport
Content-Type: application/sdp
Content-Length: 639
v=0
o=vue 3202 3202 IN IP4 192.168.57.10
s=-
c=IN IP4 192.168.57.10
t=0 0
m=audio 31004 RTP/AVP 108 101
a=rtpmap:108 AMR-WB/16000/1
a=fmtp:108 mode-change-capability=2;max-red=0
a=rtpmap:101 telephone-event/16000
a=fmtp:101 0-15
a=ptime:20
a=maxptime:240
a=sendrecv
a=curr:qos local sendrecv
a=curr:qos remote none
a=des:qos mandatory local sendrecv
a=des:qos mandatory remote sendrecv
m=video 37050 RTP/AVP 118
a=rtpmap:118 H264/90000
a=fmtp:118 profile-level-id=64E00D; max-br=640
a=sendrecv
a=curr:qos local sendrecv
a=curr:qos remote none
a=des:qos mandatory local sendrecv
a=des:qos mandatory remote sendrecv

6 PRACK 200 OK

SIP/2.0 200 OK
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKaeecbowMmawMmxhaaqJ2;rport=5060
Call-ID: bbecbowMm@192.168.57.10
From: <sip:[e-mail]>;tag=ccecbow
To:
"18801200325"<sip:[e-mail];user=phone>;tag=sbc080479mp79ee
CSeq: 2 PRACK
Server: RCS-client/OMA1.0 HW-VxW/V1.0
Content-Length: 0

7 200 OK

SIP/2.0 200 OK
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKbfecbowMmawMmxhaayba;rport=5060
Call-ID: bbecbowMm@192.168.57.10
From: <sip:[e-mail]>;tag=ccecbow
To:
"18801200325"<sip:[e-mail];user=phone>;tag=sbc080479mp79ee
CSeq: 3 UPDATE
Allow: INVITE,ACK,BYE,CANCEL,UPDATE,INFO,PRACK,SUBSCRIBE,NOTIFY,REFER
Contact: <sip:72.10.10.51:5060>
Server: RCS-client/OMA1.0 HW-VxW/V1.0
Supported: 100rel,join,norefersub,precondition,replaces
Content-Length: 649
Content-Type: application/sdp
v=0
o=- 21401 21402 IN IP4 72.10.10.60
s=SBC call
c=IN IP4 72.10.10.60
t=0 0
m=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/16000/1
a=fmtp:108 mode-change-capability=2;max-red=0
a=rtpmap:101 telephone-event/16000
a=fmtp:101 0-15
a=ptime:20
a=maxptime:240
a=sendrecv
a=curr:qos local sendrecv
a=curr:qos remote sendrecv
a=des:qos mandatory local sendrecv
a=des:qos mandatory remote sendrecv
m=video 48152 RTP/AVP 118
a=rtpmap:118 H264/90000
a=mtp:118 profile-level-id=64E00D;max-br=640
a=sendrecv
a=curr:qos local sendrecv
a=curr:qos remote sendrecv
a=des:qos mandatory local sendrecv
a=des:qos mandatory remote sendrecv

8 180 Ringing

/*********************
被叫响铃后，网络侧给主叫发 180Ringing
*********************/
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKddecbowMmawMmxhaaGL2;rport=5060
Call-ID: bbecbowMm@192.168.57.10
From: <sip:[e-mail]>;tag=ccecbow
To:
"18801200325"<sip:[e-mail];user=phone>;tag=sbc080479mp79ee
CSeq: 1 INVITE
Allow: INVITE,ACK,BYE,CANCEL,UPDATE,INFO,PRACK,SUBSCRIBE,NOTIFY,REFER
Contact: <sip:72.10.10.51:5060>
Require: 100rel,precondition
Server: RCS-client/OMA1.0 HW-VxW/V1.0
RSeq: 2
Feature-Caps: *;+g.3gpp.srvcc;+g.3gpp.srvcc-alerting
Content-Length: 0

9 PRACK

/*****************
UE 侧收到 183 或 180 的信令后都会回 PRACK
******************/
PRACK sip:72.10.10.51:5060 SIP/2.0
From: <sip:[e-mail]>;tag=ccecbow
To:
"18801200325"<sip:[e-mail];user=phone>;tag=sbc080479mp79ee
Call-ID: bbecbowMm@192.168.57.10
CSeq: 4 PRACK
Max-Forwards: 70
User-Agent: RCS-client/OMA1.0 HW-VxW/V1.0
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKcgecbowMmawMmxhaaOda;rport
RAck: 2 1 INVITE
Content-Length: 0

10 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 OK
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKcgecbowMmawMmxhaaOda;rport=5060
Call-ID: bbecbowMm@192.168.57.10
From: <sip:[e-mail]>;tag=ccecbow
To:
"18801200325"<sip:[e-mail];user=phone>;tag=sbc080479mp79ee
CSeq: 4 PRACK
Server: RCS-client/OMA1.0 HW-VxW/V1.0
Content-Length: 0

11 INVITE 200 OK

SIP/2.0 200 OK
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKddecbowMmawMmxhaaGL2;rport=5060
Call-ID: bbecbowMm@192.168.57.10
From: <sip:[e-mail]>;tag=ccecbow
To:
"18801200325"<sip:[e-mail];user=phone>;tag=sbc080479mp79ee
CSeq: 1 INVITE
Allow: INVITE,ACK,BYE,CANCEL,UPDATE,INFO,PRACK,SUBSCRIBE,NOTIFY,REFER
Contact: <sip:72.10.10.51:5060>;+g.3gpp.mid-call
Require: timer
Server: RCS-client/OMA1.0 HW-VxW/V1.0
Supported: tdialog,100rel,join,norefersub,precondition,replaces
Session-Expires: 1800;refresher=uac
Feature-Caps: *;+g.3gpp.srvcc;+g.3gpp.srvcc-alerting
Content-Length: 0

12 ACK

/****************
给网络侧下发的最后的 200 OK 回 ACK
****************/
ACK sip:72.10.10.51:5060 SIP/2.0
From: <sip:[e-mail]>;tag=ccecbow
To:
"18801200325"<sip:[e-mail];user=phone>;tag=sbc080479mp79ee
Contact: <sip:460602013050064@192.168.57.10:5060>
Call-ID: bbecbowMm@192.168.57.10
CSeq: 1 ACK
Max-Forwards: 70
User-Agent: RCS-client/OMA1.0 HW-VxW/V1.0
Via: SIP/2.0/UDP
192.168.57.10:5060;branch=z9hG4bKdhecbo0SWa0SWOhaa4cw;rport
Content-Length: 0