《04VoLTE信令流程培训材料v2》由会员分享，可在线阅读，更多相关《04VoLTE信令流程培训材料v2（35页珍藏版）》请在金锄头文库上搜索。
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
2、考方案：建议同一页面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:20-22ptBulletsl
3、evel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificus
4、agedetails，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
5、:ArialToprightcornerforfield-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
6、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消息在消息在QCI5承承载上上传输，QCI5作作为默默认承承载，连接接UE和和IMS APN，因此SIP信
7、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:ArialToprightcornerfo
8、rfield-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：Page5S
9、lidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingnineg
10、roupsofcolorsareanexampleofhowourdesigncolorscanbeused，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 Budg
11、et 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、QC
12、I2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:ArialT
13、oprightcornerforfield-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:Page7Sli
14、detitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegro
15、upsofcolorsareanexampleofhowourdesigncolorscanbeused，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：
16、Page8Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowin
17、gninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，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:FrutigerNextLTMediumFonttobeused
18、bycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyous
19、houldonlyuseonedesigncolorgroupperslide.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:20-22ptBulletslevel2-5:18ptCol
20、or:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refe
21、rtothe“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:ArialTopright
22、cornerforfield-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
23、构-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:FrutigerNextLTMediumFontto
24、beusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenoteth
25、atyoushouldonlyuseonedesigncolorgroupperslide.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)RRCULInformati
26、onTransferS1APULNASTRANSRRCConnectionRecfgCmpActivateDefaultEPSBearerContextAcceptERABSETUPRSPPage13Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeused
27、bycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.实例实例EPSAttachment实例，包含Comb
28、inedattach、QCI9&QCI5激活等内容:Page14Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpa
29、rtnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.SIP注册注册当VoLTE终端注册到IMSAPN时会建立一条QCI5默认承载，但此时还不能进行VoLTE通话，因为VoLTE终端还需要到IMS上进行注册，SIP注册消息承载在QCI5上；下
30、图显示了SIP注册的基本流程：SIP的注册流程包括：1)Register:UE读取IMSI，发送Register消息给CSCF；2)401:CSCF提取和保存IK和CK，在401响应中转发RAND和AUTN给UE；3)Register:UE使用共享秘钥和RAND计算RES，重构Register消息，并发送给CSCF;4)200OK:CSCF响应200OK给UE，来指示基本注册成功。注意：P-CSCF是IMS的入口设备。Page15Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycus
31、tomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushould
32、onlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.实例实例SIP基本注册流程：Page16Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumF
33、onttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.目录4SRVCC5IP短消息6
34、附录1概述2注册流程3基本呼叫Page17Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogoty
35、pes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.语音呼叫语音呼叫和SIP注册类似，VoLTE通话也需要使用SIP消息来初始化MO和MT之间的会话；中间的流程图显示了一个VoLTE基本呼叫的SIP协商流程图；右侧列出了典型的SIP请求和响应的用途。Invite
36、：MO(主叫)发起一个VoLTE呼叫，向MT(被叫)发送一条Invite请求消息。100Trying：Invite请求的临时响响应消息消息，通常是MT(被叫)或者IMS用来指示已经正确收到了Invite请求。183sessionprogress：该响应用来指示会话正在处理中，一般是precondition打开打开时用来指示用来指示资源源预留使用，由留使用，由MT(被叫被叫)或或IMS发送送。PRACK：PRACK通常和183消息成对出现，一般用来指示指示1xx响响应已已经正常收到正常收到，这里用来指示无线承载资源准备就绪。UPDATE：UPDATE用来协商更新端到端的媒体面更新端到端的媒体面参
37、数参数等。180Ringing：180振铃消息用来指示被叫已经振铃。200OK：200 OK通常是通常是对某某请求消息的确求消息的确认，这里要关注最后一条，表示被叫已经摘机。Page18Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycusto
38、mersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.语音呼叫流程语音呼叫流程左图为VoLTE基本呼叫的MO到P-CSC
39、F(IMS入口网元)流程图部分.呼叫流程中包括2类消息内容：一类是SIP消息；另一类是层3消息，其中方框中的消息内容为QCI1的激活过程.QCI1激活流程由激活流程由 183 session progress消息触消息触发.Page19Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLT
40、MediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.呼叫时延呼叫时延
41、VoLTE呼叫中，呼叫事件是由SIP消息来表征的，例如180Ring消息表示被叫振铃，200OK表示被叫摘机，因此呼叫时延使用SIP消息间隔来定义。(1)主叫时延:Time(180)Time(Invite)(2)被叫时延:Time(Ack)Time(200)(3)E2E时延:Callerdelay+Calleddelay=Time(180)Time(Invite)+Time(Ack)Time(200)主叫时延会受到振铃类型的影响：(1)早振铃:在QCI1承载建立之前发送180Ring响应。(2)晚振铃:在QCI1承载建立之后发送180Ring响应。Page20Slidetitle:32-35p
42、tColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsare
43、anexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.实例实例主叫Signaling实例及关键信元：Page21Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetex
44、t:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgrouppersl
45、ide.Forspecificusagedetails，refertothe“TypesettingStandard”.挂机流程挂机流程和基本呼叫过程类似，VoLTE挂机流程中，也包含2类消息：SIP消息和层3消息.对于挂机流程来说，SIP消息包括Bye消息和200OK响应消息，无论主叫还是被叫均可以发起Bye请求消息.方框中为QCI1的去激活过程.Page22Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20
46、-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.
47、Forspecificusagedetails，refertothe“TypesettingStandard”.实例实例挂机流程实例和关键信元：Page23Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners
48、:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.目录5IP短消息6附录1概述2注册流程3基本呼叫4SRVCCPage24Slidetitle:3
49、2-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolo
50、rsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.SRVCC 基基本原理和网络架构本原理和网络架构InterfaceDescriptionProtocolSvSvinterfacebetweentheMobilityManagementEntity(MME)orServingGPRSSupportNode(SGSN)and3
51、GPPMSCserverenhancedforSRVCC.SvinterfaceisusedtosupportInter-RAThandoverfromVoIP/IMSoverEPStoCSdomainover3GPPUTRAN/GERANaccessorfromUTRAN(HSPA)to3GPPUTRAN/GERANaccess.ItsbasedonGTPv2 protocol.3GPPTS29.280VoLTE给用户带来了良好的语音质量和用户体验，但当用户从LTE覆盖良好的区域移动到LTE弱覆盖区域时，可能会带来掉话，甚至招致投诉，SRVCC提供了一种机制来保证语音业务的连续性。.当用户移
52、动到LTE弱覆盖区域时，会触发SRVCC切换，将当前LTE上的语音业务切换到传统2G/3G的CS域，从而保证语音连续性。2G/3G的核心网需要升级来提供Sv接口，从而实现对SRVCC功能的支持。Page25Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeu
53、sedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.SRVCC 控制面流程控制面流程从无线侧来看，
54、SRVCC的切换流程和数据业务的异系统切换流程没有区别。SRVCC切换将UE从LTE的PS域迁移到UMTS/GSM的CS域，对应的内容可以从“handoverRequired”消息中看到。当VoLTE并发数据业务发生SRVCC时，包含2种场景：(1)CSonlySRVCC，数据业务将会在发生RAU接入后数秒恢复；(2)CS+PSSRVCC，数据业务也同时发生切换，业务将在数百毫秒后恢复。Page26Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartner
55、s:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesign
56、colorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.SRVCC 媒体面媒体面当VoLTE并发数据业务发生SRVCC切换时，MME将在eMSC的配合下降语音业务迁移到传统网络的CS域，同时将数据业务迁移到传统的PS域。SRVCC切换引起的用户名中断大约为0.5s1s，影响到了用户体验，因此协议引入了eSRVCC来减少业务中断时延。eSRVCC通过部署的ATCF和ATGW分别作为信令面和媒体面的锚定，将业务中断时延减小到约300毫秒。Page27Slidetitle:32-35ptColor:R153
57、G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleof
58、howourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.实例实例SRVCC切换实例及关键信元.Page28Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBullet
59、slevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecific
60、usagedetails，refertothe“TypesettingStandard”.目录6附录1概述2注册流程3基本呼叫5IP短消息4SRVCCPage29Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartn
61、ers:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.注册流程注册流程IP短消息是需要核心网引入网元IP-SM-GW来支持，并且需要VoLTE终
62、端在IP_SM_GW上进行注册后，才能发起IP短消息业务.因为注册消息都是SIP请求和响应消息，因此都承载在QCI5之上，在空口能看到的SIP消息有2条：用来指示UE支持IP短消息业务的Register请求消息，和用来对其进行确认的200OK响应消息.IP短消息业务不牵涉QCI1等专有承载.Page30Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor
63、:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refert
64、othe“TypesettingStandard”.IP短消息流程短消息流程从UU口来看，IP短消息流程包括4步：1.UE构造MESSAGE请求发送给P-CSCF(proxy-callsessioncontrolfunction)，P-CSCF通过头部构造后转发给S-CSCF(serving-callsessioncontrolfunction).2.IP-SM-GW收到MESSAGE后将消息内容转发到SMSC短消息中心，并且回复202Accept响应.3.IP-SM-GW确认SMSC短消息中心收到短信内容后，构造MESSAGE请求给UE，指示短消息发送成功.4.UE回复200OK给IP-SM
65、-GW确认.Page31Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thef
66、ollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.实例实例IP短消息实例及关键信元：Page32Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersan
67、dpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseo
68、nedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.目录5IP短消息1概述2注册流程3基本呼叫6附录4SRVCCPage33Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextL
69、TMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.CSFB &
70、VoLTE 选择选择支持CSFB或VoLTE的UE在选择E-UTRAN或UTRAN、GREAN驻留时，通过AttachRequest消息中的下列字段来进行判断和选择：A)UEsusagesetting(1)该字段为0，表明是Voicecentric.(2)该字段为1，表明是Datacentric.B)VoicedomainpreferenceforE-UTRAN(1)该字段为0，表明是CSvoiceonly.(2)该字段为1，表明是IMSPSvoiceonly(3)该字段为2，表明是CSvoicepreferred,IMSPSvoiceassecondary.(4)该字段为3，表明是IMSPS
71、voicepreferred,CSVoiceassecondary.本页流程图为当UE能力为“preferIMSPSVoicewithCSVoiceassecondary”时，UE进行联合注册和网络选择行为。Page34Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFo
72、nttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.附录附录 VoLTE网络到网络到
73、2/3G网络的语音呼叫网络的语音呼叫TMGW1TMGW2OtherDomainI/SCSCF1PCSCF/SBC14GNetwork2G/3GNetworkI/SCSCF2PCSCF/SBC24GNetworkTMSSMGCF2HLR/HSS/UPCCENS/IMS-HSS2STP1HLR/HSS/UPCCENS/IMS-HSS12G/3GNetworkS/PGWGGSNMME/SGSNSTP2MME/SGSNS/PGWGGSNTMSSMGCF1SignalingMediaVMGW1VMSC1VMSC2VMGW2Page35Slidetitle:32-35ptColor:R153G0B0Cor
74、porateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark，customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourd
75、esigncolorscanbeused，pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails，refertothe“TypesettingStandard”.TMGW1TMGW2OtherDomainI/SCSCF1PCSCF/SBC14GNetwork2G/3GNetworkI/SCSCF2PCSCF/SBC24GNetworkTMSSMGCF2HLR/HSS/UPCCENS/IMS-HSS2STP1HLR/HSS/UPCCENS/IMS-HSS12G/3GNetworkS/PGWGGSNMME/SGSNSTP2MME/SGSNS/PGWGGSNTMSSMGCF1SignalingMediaVMGW1VMSC1VMSC2VMGW2附录附录 VoLTE网络到其它网络域的语音呼叫网络到其它网络域的语音呼叫
