04--VoLTE_信令流程培训材料v2cte.pptx
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1、英文标题英文标题:32-35pt 颜色颜色:R153 G0 B0内部使用字体内部使用字体:FrutigerNext LT Medium外部使用字体外部使用字体:Arial中文标题中文标题:30-32pt 颜色颜色:R153 G0 B0字体字体:黑体黑体英文正文英文正文:20-22pt子目录子目录(2-5级级):18pt 颜色颜色:黑色黑色内部使用字体内部使用字体:FrutigerNext LT Regular外部使用字体外部使用字体:Arial中文正文中文正文:18-20pt子目录子目录(2-5级级):18pt 颜色颜色:黑色黑色字体字体:细黑体细黑体 配色参考方案:配色参考方案:建议同一页面
2、建议同一页面内不超过四种内不超过四种颜颜色,以色,以下是下是组配色方组配色方案,案,同同一页面内只一页面内只选择一组使用。选择一组使用。(仅供参考)(仅供参考)客户或者合作客户或者合作伙伴的标志放伙伴的标志放在右上角在右上角.VoLTE信令流程培训材料信令流程培训材料VolteVolte信令流程信令流程Page2Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18pt
3、Color:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,r
4、efertothe“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:ArialTopri
5、ghtcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.VoLTE概述概述近年来,VoiceOverLTE(VoLTE)日益成为商用LTE网络的主流语音解决方案,它集成了Vo
6、iceOverIP(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消息在消息在QCI5承载承载上传输,上传输,QCI5作为默认承载,连接作为默认承载,连接UE和和IMS APN,因此SIP信令实
7、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:ArialToprightcornerforf
8、ield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.IMS网元网元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:Page5Sli
9、detitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegro
10、upsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.VoLTE的承载的承载根据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。QCIResource TypePriorityPacket Delay Budget
11、 Packet Error Loss RateQCI purpose1GBR2100ms10-2ConversationalVoice24150ms10-3ConversationalVideo(LiveStreaming)5No-GBR1100ms10-6IMSSignallingNon-VoLTE UEVoLTE UEIdleVoiceCallOverLTEVoice&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
12、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:ArialTopright
13、cornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.VoLTE总体流程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
14、:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofco
15、lorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.SIP协议栈结构协议栈结构SIP(SessionInitiationProtocol)是RFC3261中定义的一种应用层协议应用层协议,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:Pag
16、e8Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingni
17、negroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.SIP消息消息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:FrutigerNextLTMediumFonttobeusedbyc
18、ustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushou
19、ldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.SIP消息消息SIP响应是3位数的状态码,用来指示对请求消息是否满意等。响应码的第一位用来定义响应类型:Page10Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:
20、BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,referto
21、the“TypesettingStandard”.目录3基本呼叫4SRVCC5IP 短消息6附录1概述2注册流程Page11Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightco
22、rnerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.EPS 附着附着(1)注册流程包括EPSattachment和IMS注册;3GPPIR.92标准推荐VoLTE使用双APN架构-
23、InternetAPN和IMSAPN;VoLTE终端在附着到InternetAPN时创建QCI9默认承载,在附着到IMSAPN时创建QCI5默认承载。VoLTE终端在Attachrequest消息里指示语音方案选择偏好和SRVCC能力。EPC通过Attachaccept消息指示CN是否支持VoLTE。Defaultbearer(GBR)QCI=8/9InternetAPNDefaultbearer(Non-GBR)QCI=5IMSAPNPage12Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobe
24、usedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethat
25、youshouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.EPS 附着附着(2)下图显示了IMS附着后QCI5承载建立流程PDNConnectivityRequestRRCULInformationTransferS1APULNASTRANSERABSETUPREQ(QCI5)RRCConnectionRecfg(ADDEPSBear)ActivateDefaultEPSBearerContextrequest(QCI5)RRCULInformation
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