SIP协议原理及实例分析

HUAWEITECHNOLOGIESCO.,LTD.HuaweiConfidentialSecurityLevel:Slidetitle:40-47ptSlidesubtitle:26-30ptColor::whiteCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:Arial:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.Page2学习目标学习完此课程，您将会：了解SIP协议原理掌握SIP命令和消息掌握SIP协议的消息交互过程了解SIP业务基本故障分析处理方法HUAWEITECHNOLOGIESCO.,LTD.HuaweiConfidentialSlidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.Page3第1章SIP协议原理第2章SIP命令和消息第3章业务流程分析HUAWEITECHNOLOGIESCO.,LTD.HuaweiConfidentialSlidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.Page4SIP协议概念SIP的前世SIP的前世有关SIP的完整定义最早出现在1999年公布的RFC2543中，当前SIP详细定义于RFC3261(June2002)。Multi-PartyMultimediaWorkingGroup于1996年提出两项关于在Internet中实现多媒体通信的建议：SessionInitiationProtocol(SIP)SimpleConferenceInvitationProtocol(SCIP)最终两项建议统一于SessionInitiationProtocolSIP。HUAWEITECHNOLOGIESCO.,LTD.HuaweiConfidentialSlidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.Page5SIP协议概念SIP是SessionInitializationProtocol（会话初始协议）的缩写，用来建立、更改和终止一个或者多个参与者的会话。这些会话包括多媒体会议、网络呼叫等。IETF制订的多媒体通信系统框架协议之一，但是SIP单独不能完成多媒体呼叫，必须要与其他协议一起才能组建完整的多媒体通信系统，与RTP/RTCP、SDP等协议配合共同完成多媒体会话过程。HUAWEITECHNOLOGIESCO.,LTD.HuaweiConfidentialSlidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.Page6SIP协议功能描述用户定位：确定参加通信的终端用户的位置。用户通信能力协商：确定通信的媒体类型和参数。用户交互意愿：确定被叫加入通信的意愿。呼叫建立：建立主叫和被叫的会话参数。呼叫处理和控制：包括呼叫重定向、呼叫转移、终止呼叫等。HUAWEITECHNOLOGIESCO.,LTD.HuaweiConfidentialSlidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.Page7SIP协议特点借鉴了其他internet标准和协议的设计思想，在风格上遵循因特网一贯坚持的简练、开放、兼容和可扩展等原则，并充分注意到因特网开放而复杂的网络环境下的安全问题；充分考虑了对传统公共电话网的各种业务，包括IN业务（Internet）和ISDN业务的支持；通过代理和重定向请求用户当前位置，以支持用户的移动性；独立于传输层协议，可以承载在不同的传输协议上（UDP、TCP、SCTP、TLS），因此可以灵活方便地扩展其他附加功能；SIP协议独立于业务，协议不限制具体业务范畴，只描述建立/更改/终止一个会话，并不描述会话的内容，所以可以承载任何的会话内容，如语音/视频/游戏等。HUAWEITECHNOLOGIESCO.,LTD.HuaweiConfidentialSlidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.Page8SIP与H.248对比SIPH248StandardsIETF/TISPANITU_T/TISPANArchit