MSCBSC 移动通信论坛
搜索
登录注册
网络优化工程师招聘专栏 4G/LTE通信工程师最新职位列表 通信实习生/应届生招聘职位
 

  • 阅读:2649
  • 回复:0
IMS/SIP中的无应答前转 (CFNR)
KangGuoYing
版主
鎵嬫満鍙风爜宸查獙璇


 发短消息    关注Ta 

C友·铁杆勋章   公益·慈善勋章   C友·贡献勋章   纪念勋章·七周年   财富勋章·万元户   专家·高级勋章   财富勋章·财运连连   财富勋章·小财主   C友·登录达人   财富勋章·富甲一方   纪念勋章·八周年   纪念勋章·九周年   纪念勋章·十周年   纪念勋章·十二周年   C友·技术大神  
积分 93428
帖子 6242
威望 695543 个
礼品券 11319 个
专家指数 24033
注册 2007-3-13
专业方向 
回答问题数 13554
回答被采纳数 1833
回答采纳率 14%
 
发表于 2020-10-16 14:53:20  只看楼主 

        关于IMS/SIP中的无应答前转(Communication Forwarding on no Reply-CFNR)是当被叫未做出应答时处理方式之一,其具体在3GPP TS24.604有具体定义;


1.终端注册,参与无应答前转的终端(UA)需要:


          A.在CSCF进行注册并预设前转条件;


          B.当某一终端(UA)发起的呼叫响应(180 Ringing)超时后,根据预设进行呼叫前转;


2.无应答前转信令流程:

image.png

image.png


3.无应答前转主要消息内容


(A) INVITE sip:UA1@ims.mnc246.mcc081.3gppnetwork.org SIP/2.0

Via: SIP/2.0/TCP [2001:0:0:1::2]:59417;branch=z9hG4bK62bc484e8cdd4ddc8e563c19815bf51aac5bd1e1;transport=tcp

Max-Forwards: 70

Call-ID: cf01b053c04a414ab24990140d4d2297

CSeq: 38001 INVITE

To: sip:UA1@ims.mnc246.mcc081.3gppnetwork.org

From: sip:UA2@ims.mnc246.mcc081.3gppnetwork.org;tag=1111111111

Feature-Caps: *;+g.3gpp.srvcc-alerting;+g.3gpp.mid-call

Allow: ACK, BYE, CANCEL, INVITE, PRACK, UPDATE

Accept-Contact: *;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel";require;explicit

Privacy: none

User-Agent: Sharetechnote-VirtualUA/7e501f1

Content-Type: application/sdp

Content-Length: 728

Route: <sip:[2001:0:0:1::2]:28101;lr>

Contact: <sip:UA2@[2001:0:0:1::2]:59417;transport=tcp>;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel";video;+g.3gpp.srvcc-alerting;+g.3gpp.mid-call

 

v=0

o=Sharetechnote 583 102583 IN IP6 2001:0:0:1::2

s=-

i=A VOIP Session

c=IN IP6 2001:0:0:1::2

t=0 0

m=audio 60000 RTP/AVP 96 97 98 99 100 8 0 101 102

b=AS:153

b=RS:800

b=RR:2400

a=ptime:20

a=maxptime:240

a=rtpmap:96 EVS/16000/1

a=fmtp:96 max-red=220

a=rtpmap:97 AMR-WB/16000/1

a=fmtp:97 mode-change-capability=2

a=rtpmap:98 AMR-WB/16000/1

a=fmtp:98 octet-align=1; mode-change-capability=2

a=rtpmap:99 AMR/8000/1

a=fmtp:99 mode-change-capability=2

a=rtpmap:100 AMR/8000/1

a=fmtp:100 octet-align=1; mode-change-capability=2

a=rtpmap:8 PCMA/8000/1

a=rtpmap:0 PCMU/8000/1

a=rtpmap:101 telephone-event/16000

a=fmtp:101 0-15

a=rtpmap:102 telephone-event/8000

a=fmtp:102 0-15

a=mid:0

a=rtcp:60001

a=sendrecv


(C) 180 Ringing(UA1送回铃音给CSCF)

Via: SIP/2.0/UDP [2001:0:0:1::2]:5060;branch=z9hG4bKc7d5dede360c4bb5a88be02f843e7c4598;rport;transport=udp

Via: SIP/2.0/TCP [2001:0:0:1::2]:59417;branch=z9hG4bK62bc484e8cdd4ddc8e563c19815bf51aac5bd1e1;transport=tcp

Max-Forwards: 70

Record-Route: <sip:[2001:0:0:1::2]:5060;lr>

Contact: <sip:UA1@[2001:0:0:1::11]:5060>;+sip.instance="<urn:gsma:imei:35975507-290776-0>";+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel";+g.3gpp.mid-call;+g.3gpp.srvcc-alerting;+g.3gpp.ps2cs-srvcc-orig-pre-alerting;video

To: <sip:UA1@ims.mnc246.mcc081.3gppnetwork.org>;tag=c0eff945

From: <sip:UA2@ims.mnc246.mcc081.3gppnetwork.org>;tag=1111111111

Call-ID: cf01b053c04a414ab24990140d4d2297

CSeq: 38001 INVITE

Supported: timer, 100rel

User-Agent: T-Mobile VoLTE-ePDG-IR94 SEC/G930TUVU4Z 7.0

P-Access-Network-Info: 3GPP-E-UTRAN-FDD;utran-cell-id-3gpp=0010100010000000

Content-Length: 0

 

(D) 180 Ringing(CSCF送回铃音给UA2)

Via: SIP/2.0/TCP [2001:0:0:1::2]:59417;branch=z9hG4bK62bc484e8cdd4ddc8e563c19815bf51aac5bd1e1;transport=tcp

Max-Forwards: 70

Record-Route: <sip:[2001:0:0:1::2]:28101;lr>

Contact: <sip:UA1@[2001:0:0:1::11]:5060>;+sip.instance="<urn:gsma:imei:35975507-290776-0>";+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel";+g.3gpp.mid-call;+g.3gpp.srvcc-alerting;+g.3gpp.ps2cs-srvcc-orig-pre-alerting;video

To: <sip:UA1@ims.mnc246.mcc081.3gppnetwork.org>;tag=c0eff945

From: <sip:UA2@ims.mnc246.mcc081.3gppnetwork.org>;tag=1111111111

Call-ID: cf01b053c04a414ab24990140d4d2297

CSeq: 38001 INVITE

Supported: timer, 100rel

User-Agent: T-Mobile VoLTE-ePDG-IR94 SEC/G930TUVU4Z 7.0

P-Access-Network-Info: 3GPP-E-UTRAN-FDD;utran-cell-id-3gpp=0010100010000000

Content-Length: 0

  

(E) CANCEL sip:UA1@[2001:0:0:1::11]:5060 SIP/2.0(呼叫超时,CSCF撤消UA1发起的呼叫)

Max-Forwards: 70

Call-ID: cf01b053c04a414ab24990140d4d2297

CSeq: 38001 CANCEL

To: sip:UA1@ims.mnc246.mcc081.3gppnetwork.org

From: sip:UA2@ims.mnc246.mcc081.3gppnetwork.org;tag=1111111111

Via: SIP/2.0/UDP [2001:0:0:1::2]:5060;branch=z9hG4bKc7d5dede360c4bb5a88be02f843e7c4598;rport;transport=udp

Via: SIP/2.0/TCP [2001:0:0:1::2]:59417;branch=z9hG4bK62bc484e8cdd4ddc8e563c19815bf51aac5bd1e1;transport=tcp

Content-Length: 0  

 

(F) 181 Call Is Being Forwarded(呼叫前转)

Max-Forwards: 70

Via: SIP/2.0/TCP [2001:0:0:1::2]:59417;branch=z9hG4bK62bc484e8cdd4ddc8e563c19815bf51aac5bd1e1;transport=tcp

From: sip:UA2@ims.mnc246.mcc081.3gppnetwork.org;tag=1111111111

To: sip:UA1@ims.mnc246.mcc081.3gppnetwork.org;tag=c0eff945

Call-ID: cf01b053c04a414ab24990140d4d2297

CSeq: 38001 INVITE

History-Info: <sip:UA1@ims.mnc246.mcc081.3gppnetwork.org>; index=1

History-Info: <sip:UA1@ims.mnc246.mcc081.3gppnetwork.org>; index=1.1; NP=1

Content-Length: 0 

 

(G) INVITE sip:UA3@[2001:0:0:1::2]:54990;transport=udp;cause=408 SIP/2.0(呼叫INVITE预设对象UA3)

Via: SIP/2.0/UDP [2001:0:0:1::2]:5060;branch=z9hG4bKc7d5dede360c4bb5a88be02f843e7c459d;rport;transport=udp

Via: SIP/2.0/TCP [2001:0:0:1::2]:59417;branch=z9hG4bK62bc484e8cdd4ddc8e563c19815bf51aac5bd1e1;transport=tcp

Max-Forwards: 69

Call-ID: cf01b053c04a414ab24990140d4d2297

CSeq: 38001 INVITE

To: sip:UA3@test.3gpp.com

From: sip:UA2@ims.mnc246.mcc081.3gppnetwork.org;tag=1111111111

Feature-Caps: *;+g.3gpp.srvcc-alerting;+g.3gpp.mid-call

Allow: ACK, BYE, CANCEL, INVITE, PRACK, UPDATE

Accept-Contact: *;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel";require;explicit

User-Agent: Sharetechnote-VirtualUA/7e501f1

Content-Type: application/sdp

Content-Length: 728

Contact: <sip:UA2@[2001:0:0:1::2]:59417;transport=tcp>;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel";video;+g.3gpp.srvcc-alerting;+g.3gpp.mid-call

Privacy: none

P-Asserted-Identity: <sip:UA2@ims.mnc246.mcc081.3gppnetwork.org>

History-Info: <sip:UA1@ims.mnc246.mcc081.3gppnetwork.org>; index=1

History-Info: <sip:UA1@ims.mnc246.mcc081.3gppnetwork.org>; index=1.1; NP=1



原文来自:http://www.sharetechnote.com

整理:kangguoying20201016

5G网络中层二的RLC介绍 ”已在微信公众号"跟着老康学5G"中推出,敬请关注!

扫码关注5G通信官方公众号,免费领取以下5G精品资料
  • 1、回复“yd5g”免费领取《中国移动5G二期产品介绍
  • 2、回复“1021”免费领取《芯片行业最新报告
  • 3、回复“nr999”免费领取《5G NR考试题库(2020年9月)
  • 4、回复“5ghmb”免费领取《《5G毫米波技术白皮书》
  • 5、回复“5gwa”免费领取《中国物联网行业市场研究
  • 6、回复“5433”免费领取《5G工程优化案例---30页PPT
  • 7、回复“yk888”免费领取《5G新基建产品手册(2020年9月)
  • 8、回复“sa36”免费领取《36个典型案例!5G SA端到端测试问题
  • 对本帖内容的看法? 我要点评

     
    [充值威望,立即自动到帐] [VIP贵宾权限+威望套餐] 另有大量优惠赠送活动,请光临充值中心
    充值拥有大量的威望和最高的下载权限,下载站内资料无忧

    快速回复主题    
    标题
    内容
     上传资料请点左侧【添加附件】

    当前时区 GMT+8, 现在时间是 2020-10-27 13:53:24
    渝ICP备11001752号  Copyright @ 2006-2016 mscbsc.com  本站统一服务邮箱:mscbsc@163.com

    Processed in 0.319050 second(s), 13 queries , Gzip enabled
    TOP
    清除 Cookies - 联系我们 - 移动通信网 - 移动通信论坛 - 通信招聘网 - Archiver