VoLTE 交流材料

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1、Security Level:Slidetitle:40-47ptSlidesubtitle:26-30ptColor:whiteCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialHUAWEITECHNOLOGIESCO.,LTD.VoLTE信令流程培訓(xùn)信令流程培訓(xùn)Author:Jinyu00114921Version:V1.0(20150209)HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:Frut

2、igerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanb

3、eused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential2目目 錄錄SIP簡(jiǎn)介簡(jiǎn)介總體流程總體流程VOLTE注冊(cè)流程注冊(cè)流程基本呼叫流程基本呼叫流程SRVCC流程流程Page2HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFontto

4、beusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenoteth

5、atyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential3SIP簡(jiǎn)介（簡(jiǎn)介（Session Initiation Protocol）VoLTE使用SIP協(xié)議用來(lái)建立、修改和刪除會(huì)話，在呼叫流程中，SIP消息對(duì)應(yīng)類似2/3G呼叫過(guò)程中的CALLSETUP、SETUP、ALERTING、CONNECT等；SIP消息承載在QCI5上，對(duì)eNodeB來(lái)說(shuō)是業(yè)務(wù)數(shù)據(jù)包，不在信令面；QCI5承載承載HUAWEITECHNOL

6、OGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-The

7、followingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential4目目 錄錄SIP簡(jiǎn)介簡(jiǎn)介總體流程總體流程VOLTE注冊(cè)流程注冊(cè)流程基本呼叫流程基本呼叫流程SRVCC流程流程Page4HUAWEITECHNOLOGIESCO.,LTD.Slidetitl

8、e:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofc

9、olorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential5總體流程總體流程網(wǎng)元介紹網(wǎng)元介紹HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobe

10、usedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethat

11、youshouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential6IMS引入的網(wǎng)元引入的網(wǎng)元(部分部分)Page6涉及網(wǎng)元涉及網(wǎng)元功能功能P-CSCF作為IMS拜訪網(wǎng)絡(luò)的入口，負(fù)責(zé)將UE側(cè)發(fā)送的消息向用戶的歸屬網(wǎng)絡(luò)轉(zhuǎn)發(fā)，以及將來(lái)源于用戶歸屬網(wǎng)絡(luò)的消息向UE側(cè)轉(zhuǎn)發(fā)。I-CSCF作為IMS歸屬網(wǎng)絡(luò)的入口，負(fù)責(zé)查詢IMS-HSS，為用戶選擇一個(gè)合適的S-CSCF提供服務(wù)。S-CSCF從IMS-HSS上下載用戶的簽約信息，對(duì)基本注冊(cè)

12、進(jìn)行鑒權(quán)。代替用戶發(fā)起第三方注冊(cè)。定期將用戶的注冊(cè)狀態(tài)，發(fā)送給訂閱了用戶注冊(cè)狀態(tài)的UE、P-CSCF。SBC邊界控制功能，包括防攻擊、NAT穿越、IPv4/IPv6地址轉(zhuǎn)換融合HLR/HSSIMS-HSS提供IMS網(wǎng)絡(luò)中的HSS（Home Subscriber Server）功能，存儲(chǔ)LTE用戶在IMS網(wǎng)絡(luò)中的簽約信息。SAE-HSS提供EPC網(wǎng)絡(luò)中的HSS功能，存儲(chǔ)LTE用戶在EPC網(wǎng)絡(luò)中的簽約信息。HLR提供移動(dòng)通信系統(tǒng)電路域核心網(wǎng)和分組域核心網(wǎng)的HLR（Home Location Register）功能，存儲(chǔ)LTE用戶在電路域核心網(wǎng)和分組域核心網(wǎng)中的簽約信息。MGCF提供IMS網(wǎng)絡(luò)與傳統(tǒng)

13、PSTN，PLMN網(wǎng)絡(luò)之間的互通功能PCRF提供Qos策略和計(jì)費(fèi)控制功能HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightco

14、rnerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential7SIP信息含義信息含義Page7請(qǐng)求消息請(qǐng)求消息消息含義消息含義INVITE發(fā)起會(huì)話請(qǐng)求，

15、邀請(qǐng)用戶加入一個(gè)會(huì)話，會(huì)話描述含于消息體中。對(duì)于兩方呼叫來(lái)說(shuō)，主叫方在會(huì)話描述中指示其能夠接受的媒體類型及其參數(shù)。被叫方必需在成功響應(yīng)消息的消息體中指明其希望接受哪些媒體，還可以指示其將發(fā)送的媒體。如果收到的是關(guān)于參加會(huì)議的邀請(qǐng)，被叫方可以根據(jù)Call-ID或者會(huì)話描述中的標(biāo)識(shí)確定用戶已經(jīng)加入該會(huì)議，并返回成功響應(yīng)消息。ACK證實(shí)已收到對(duì)于INVITE請(qǐng)求的最終響應(yīng)。該消息僅和INVITE消息配套使用。BYE結(jié)束會(huì)話CANCEL取消尚未完成的請(qǐng)求，對(duì)于已完成的請(qǐng)求（即已收到最終響應(yīng)的請(qǐng)求，比如200 OK）則沒(méi)有影響。REGISTER注冊(cè)。在IMS中一般用于用戶發(fā)起注冊(cè)、注銷、刷新注冊(cè)等請(qǐng)求。

16、OPTION查詢服務(wù)器能力。在IMS中一般用于設(shè)備間心跳狀態(tài)檢測(cè)，進(jìn)一步信息請(qǐng)參考 RFC4028。PRACK臨時(shí)可靠性響應(yīng)，證實(shí)已收到1XX臨時(shí)響應(yīng)，進(jìn)一步信息請(qǐng)參考RFC 3262。INFO傳遞額外信息請(qǐng)求。在IMS中一般用于放音指示、二次收號(hào)，進(jìn)一步信息請(qǐng)參考RFC 2976。SUBSCRIBE訂閱請(qǐng)求。在IMS中一般用于用戶注冊(cè)狀態(tài)、ua-profile的訂閱，進(jìn)一步信息請(qǐng)參考RFC 3265。NOTIFY訂閱通知請(qǐng)求。在IMS中，NOTIFY消息是與SUBSCRIBE消息配合使用的，NOTIFY為SUBSCRIBE的最終響應(yīng)，進(jìn)一步信息請(qǐng)參考RFC 3265。UPDATE會(huì)話建立早期

17、或確定階段修改會(huì)話屬性，更新會(huì)話參數(shù)請(qǐng)求。在IMS中一般用于媒體更新、會(huì)話心跳檢測(cè)，進(jìn)一步信息請(qǐng)參考RFC 3311。MESSAGE立即消息。在IMS中一般用于留言燈指示（MWI）業(yè)務(wù)，進(jìn)一步信息請(qǐng)參考RFC 3428。REFER指示接收方聯(lián)系第三方請(qǐng)求，REFER請(qǐng)求的發(fā)送者指引其接收者去訪問(wèn)REFER請(qǐng)求中所標(biāo)識(shí)的資源。在IMS中一般用于點(diǎn)擊類呼叫、呼叫轉(zhuǎn)移、會(huì)議等業(yè)務(wù)，進(jìn)一步信息請(qǐng)參考RFC 3515。PUBLISH客戶端向狀態(tài)代理發(fā)布它的事件狀態(tài)。在IMS中暫無(wú)應(yīng)用，進(jìn)一步信息請(qǐng)參考RFC 3903。序號(hào)序號(hào)狀態(tài)碼狀態(tài)碼消息功能消息功能1XX臨時(shí)響應(yīng)表示已經(jīng)接收到請(qǐng)求消息，正在對(duì)其進(jìn)行

18、處理，一次呼叫中臨時(shí)響應(yīng)可以有多個(gè)。100表示請(qǐng)求消息已收到，可以防止對(duì)局請(qǐng)求超時(shí)重傳。180振鈴181呼叫正在前轉(zhuǎn)。在IMS中主要用于前轉(zhuǎn)業(yè)務(wù)。182排隊(duì)183呼叫處理中2XX成功響應(yīng)表示請(qǐng)求已經(jīng)被成功接受、處理。200OK202Accepted，指示訂閱請(qǐng)求已被初步接受，但還需等到最終決策，最終決策將在NOTIFY請(qǐng)求中給出。進(jìn)一步信息請(qǐng)參考RFC 3265。3XX重定向響應(yīng)表示需要采取進(jìn)一步動(dòng)作，以完成該請(qǐng)求。300多重選擇301永久遷移此處省略一些返回碼此處省略一些返回碼4XX客戶端錯(cuò)誤表示請(qǐng)求消息中包含語(yǔ)法錯(cuò)誤或者SIP服務(wù)器不能完成對(duì)該請(qǐng)求消息的處理。400錯(cuò)誤請(qǐng)求401無(wú)權(quán)402

19、要求付款403禁止404沒(méi)有發(fā)現(xiàn)此處省略很多返回碼此處省略很多返回碼5XX服務(wù)端錯(cuò)誤表示SIP服務(wù)器故障不能完成對(duì)正確消息的處理。500內(nèi)部服務(wù)器錯(cuò)誤501沒(méi)實(shí)現(xiàn)的此處省略一些返回碼此處省略一些返回碼6XX全局故障表示請(qǐng)求不能在任何SIP服務(wù)器上實(shí)現(xiàn)。600全忙603拒絕604都不存在606不接受HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBu

20、lletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspec

21、ificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential8總體流程總體流程承載承載VoLTE的信令I(lǐng)MS消息使用QCI為5的Non-GBRQoS、語(yǔ)音使用QCI為1的GBR、視頻使用QCI為2的GBR終端業(yè)務(wù)承載建立對(duì)應(yīng)關(guān)系：QCIResource TypePriorityPacket Delay Budget Packet Error Loss RateExample Services1GBR2100ms10-2ConversationalVoice24150ms10-3ConversationalVideo(Li

22、veStreaming)5No-GBR1100ms10-6IMSSignalling不支持不支持VoLTE的的UE支持支持VoLTE的的UE未進(jìn)行VoLTE會(huì)話進(jìn)行VoLTE語(yǔ)音通話進(jìn)行VoLTE視頻通話QCI9QCI5+QCI9QCI1+QCI5+QCI9QCI1+QCI2+QCI5+QCI9HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBul

23、letslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspeci

24、ficusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential9VOLTE總體流程總體流程HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFontto

25、beusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential10

26、目目 錄錄SIP簡(jiǎn)介簡(jiǎn)介總體流程總體流程VOLTE注冊(cè)流程注冊(cè)流程基本呼叫流程基本呼叫流程SRVCC流程流程Page10HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersand

27、partners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential11VOLTE注冊(cè)流程注冊(cè)流程EPS att

28、ach（1）VoLTE首先在EPS進(jìn)行聯(lián)合attach，與普通CSFB一致，再建立QCI5承載：UE在attachReq中攜帶SRVCC能力及VOLTE能力：EPC在attachAcp中通知UE，網(wǎng)絡(luò)側(cè)具有VOLTE-IMS，決定UE緊接下來(lái)是否發(fā)起QCI5承載建立：Defaultbearer(GBR)QCI=8/9InternetAPNDefaultbearer(Non-GBR)QCI=5IMSAPNHUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFontt

29、obeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotet

30、hatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential12eNodeBMMEPDN Connectivity RequestRRC UL Information Transfer S1AP UL NAS TRANS ERAB SETUP REQ(QCI5)RRC Connection Recfg(ADD EPS Bear)Activate Default EPS Bearer Context request(

31、QCI5)RRC UL Information Transfer S1AP UL NAS TRANS RRC Connection Recfg CmpActivate Default EPS Bearer Context AcceptERAB SETUP RSP VOLTE注冊(cè)流程注冊(cè)流程EPS attach（2）無(wú)線側(cè)觀察QCI5承載建立流程：HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners

32、:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesignc

33、olorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential13VOLTE注冊(cè)流程注冊(cè)流程IMS注冊(cè)注冊(cè)至此，手機(jī)已ready，可以正常呼叫了！Register:UE讀取USIM卡信息,向IMS發(fā)起注冊(cè)流程；401:CSCF從IMS-HSS獲取鑒權(quán)信息，發(fā)給UE；Register:UE發(fā)起第二個(gè)register信息，攜帶終端鑒權(quán)信息；200 OK:鑒權(quán)通過(guò)后，網(wǎng)絡(luò)側(cè)給終端返回注冊(cè)成功信息；QCI5建立成功后，UE將發(fā)起到IMS的注冊(cè)流程：HUAWEITECHNOLOGIE

34、SCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefoll

35、owingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential14目目 錄錄SIP簡(jiǎn)介簡(jiǎn)介總體流程總體流程VOLTE注冊(cè)流程注冊(cè)流程基本呼叫流程基本呼叫流程基本VOLTE呼叫掛機(jī)拆線短消息SRVCC流程流程Page14HUAWEITECHNOLOGIESCO.

36、,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowin

37、gninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential15基本呼叫流程（基本呼叫流程（E2E）不同SIP交互，PCRF策略等會(huì)有不同的業(yè)務(wù)流程HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0C

38、orporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowou

39、rdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential16基本呼叫流程（基本呼叫流程（SIP）Invite：UE向網(wǎng)側(cè)發(fā)起INVITE請(qǐng)求100 Trying：invite響應(yīng)183 session progress：網(wǎng)絡(luò)側(cè)在做資源預(yù)留preconditionPRACK：UE等待網(wǎng)絡(luò)資源分配UPDATE：UE收到QCI=1等承載建立后

40、就發(fā)UPDATE180 Ringing：被叫響鈴后發(fā)180Ringing，網(wǎng)絡(luò)側(cè)轉(zhuǎn)發(fā)主叫至此，手機(jī)呼叫接通！再往后就是QCI1 RTP語(yǔ)音包交換HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedby

41、customersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential17基本呼叫流程基本

42、呼叫流程掛機(jī)拆線掛機(jī)拆線HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,custom

43、erorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential18呼叫流程呼叫流程 時(shí)延定義時(shí)延定義Page18HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptC

44、olor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsarean

45、exampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential19呼叫流程呼叫流程 時(shí)延定義時(shí)延定義(續(xù)續(xù))Page19主叫接通時(shí)延：Time(180ringing)-Time(InviteSDP)，從撥打電話到聽(tīng)到振鈴的時(shí)間被叫接通時(shí)延：Time(ACK)-Time(200OKSDP)，統(tǒng)計(jì)的是摘機(jī)的時(shí)延。端到端

46、呼叫建立時(shí)延=Time(180ringing)-Time(InviteSDP)+Time(ACK)-Time(200OKSDP)HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomer

47、sandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential20目目 錄錄背景知識(shí)背景知識(shí)IMS

48、域注冊(cè)流程域注冊(cè)流程呼叫流程呼叫流程SRVCC流程流程Page20HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcorne

49、rforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential21SRVCC流程流程Page21TCopyright2011 Huawei Technologi

50、es Co.,Ltd.All Rights Reserved.The information in this document may contain predictive statements including,without limitation,statementsregardingthefuturefinancialandoperatingresults,futureproductportfolio,newtechnology,etc.Thereareanumberoffactorsthatcouldcauseactualresultsanddevelopmentstodiffermateriallyfromthoseexpressedorimpliedinthepredictivestatements.Therefore,suchinformationisprovidedforreference purpose only and constitutes neither an offer nor an acceptance.Huawei maychange theinformationatanytimewithoutnotice.