04--VoLTE_信令流程培训材料v2

英文标题:32-35pt颜色:R153G0B0内部使用字体:FrutigerNextLTMedium外部使用字体:Arial中文标题:30-32pt颜色:R153G0B0字体:黑体英文正文:20-22pt子目录(2-5级):18pt颜色:黑色内部使用字体:FrutigerNextLTRegular外部使用字体:Arial中文正文:18-20pt子目录(2-5级):18pt颜色:黑色字体:细黑体配色参考方案：建议同一页面内不超过四种颜色，以下是９组配色方案，同一页面内只选择一组使用。（仅供参考）客户或者合作伙伴的标志放在右上角.VoLTE信令流程培训材料Volte信令流程Page2Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.目录1概述2注册流程3基本呼叫4SRVCC5IP短消息6附录Page3Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.VoLTE概述近年来，VoiceOverLTE(VoLTE)日益成为商用LTE网络的主流语音解决方案，它集成了VoiceOverIP(VoIP)，LTE无线网(E-UTRAN)，LTE核心网(EPC)，IMS(IPMultimediaSubsystem)来支持在LTE网络上进行语音业务SIP(SessionInitiationProtocol)协议在VoLTE通话中扮演了重要角色，它用来创建、更新和中止一个VoLTE通话；在一次VoLTE通话过程中，SIP消息和2/3G语音通话的过程类似，也存在类似的消息，如CALLSETUP,SETUP,ALERTING,CONNECT等SIP消息在QCI5承载上传输，QCI5作为默认承载，连接UE和IMSAPN，因此SIP信令实际上是承载在PS(PacketSwitch)域，而非传统的CS(CircuitSwitch)域上。Page4Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.IMS网元VoLTE服务依赖于IMS的部署,IMS是一个新引入的复杂系统，包含了许多新网元，下表给出了一些典型的IMS网元：Page5Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.VoLTE的承载根据3GPP协议，在进行语音、视频通话时，需要建立QCI1/QCI2/QCI5承载，不同的QCI承载在协议中对诸如优先级、丢包率等参数都有相应的规定。QCIResourceTypePriorityPacketDelayBudgetPacketErrorLossRateQCIpurpose1GBR2100ms10-2ConversationalVoice24150ms10-3ConversationalVideo(LiveStreaming)5No-GBR1100ms10-6IMSSignallingNon-VoLTEUEVoLTEUEIdleVoiceCallOverLTEVoice&VideoCallOverLTEQCI9QCI5+QCI9QCI1+QCI5+QCI9QCI1+QCI2+QCI5+QCI9下表列出了对应QCI的相关参数：在VoLTE通话期间可能会建立QCI5、CQI1、QCI2承载，这些承载相对于普通数据业务具备更高的优先级、更低的丢包率、更小的时延等。下表列出了VoLTE终端在不同场景下的QCI组合：Page6Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.VoLTE总体流程下图显示出VoLTE终端开机后的标准流程，包括注册、呼叫和挂断过程:Page7Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.SIP协议栈结构SIP(SessionInitiationProtocol)是RFC3261中定义的一种应用层协议，用来创建、修改和中止一方或多方会话。SIP运行在IP层之上，传输层使用TCP或UDP，一般推荐使用UDP。下图是SIP协议栈结构：Page8Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.----------------Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.SIP消息SIP消息包括请求和响应。SIP请求以单词命名，指示消息用途。Page9Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycu