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:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential2目目 錄錄SIP簡介簡介總體流程總體流程VOLTE注冊流程注冊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:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential3SIP簡介（簡介（Session Initiation Protocol）VoLTE使用SIP協(xié)議用來建立、修改和刪除會話，在呼叫流程中，SIP消息對應(yīng)類似2/3G呼叫過程中的CALLSETUP、SETUP、ALERTING、CONNECT等；SIP消息承載在QCI5上，對eNodeB來說是業(yè)務(wù)數(shù)據(jù)包，不在信令面；QCI5承載承載HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential4目目 錄錄SIP簡介簡介總體流程總體流程VOLTE注冊流程注冊流程基本呼叫流程基本呼叫流程SRVCC流程流程Page4HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,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:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.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，對基本注冊進(jìn)行鑒權(quán)。代替用戶發(fā)起第三方注冊。定期將用戶的注冊狀態(tài)，發(fā)送給訂閱了用戶注冊狀態(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LTE用戶在EPC網(wǎng)絡(luò)中的簽約信息。HLR提供移動通信系統(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)PSTN，PLMN網(wǎng)絡(luò)之間的互通功能PCRF提供Qos策略和計費控制功能HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential7SIP信息含義信息含義Page7請求消息請求消息消息含義消息含義INVITE發(fā)起會話請求，邀請用戶加入一個會話，會話描述含于消息體中。對于兩方呼叫來說，主叫方在會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)于參加會議的邀請，被叫方可以根據(jù)Call-ID或者會話描述中的標(biāo)識確定用戶已經(jīng)加入該會議，并返回成功響應(yīng)消息。ACK證實已收到對于INVITE請求的最終響應(yīng)。該消息僅和INVITE消息配套使用。BYE結(jié)束會話CANCEL取消尚未完成的請求，對于已完成的請求（即已收到最終響應(yīng)的請求，比如200 OK）則沒有影響。REGISTER注冊。在IMS中一般用于用戶發(fā)起注冊、注銷、刷新注冊等請求。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，進(jìn)一步信息請參考 RFC4028。PRACK臨時可靠性響應(yīng)，證實已收到1XX臨時響應(yīng)，進(jìn)一步信息請參考RFC 3262。INFO傳遞額外信息請求。在IMS中一般用于放音指示、二次收號，進(jìn)一步信息請參考RFC 2976。SUBSCRIBE訂閱請求。在IMS中一般用于用戶注冊狀態(tài)、ua-profile的訂閱，進(jìn)一步信息請參考RFC 3265。NOTIFY訂閱通知請求。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)一步信息請參考RFC 3265。UPDATE會話建立早期或確定階段修改會話屬性，更新會話參數(shù)請求。在IMS中一般用于媒體更新、會話心跳檢測，進(jìn)一步信息請參考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)一步信息請參考RFC 3428。REFER指示接收方聯(lián)系第三方請求，REFER請求的發(fā)送者指引其接收者去訪問REFER請求中所標(biāo)識的資源。在IMS中一般用于點擊類呼叫、呼叫轉(zhuǎn)移、會議等業(yè)務(wù)，進(jìn)一步信息請參考RFC 3515。PUBLISH客戶端向狀態(tài)代理發(fā)布它的事件狀態(tài)。在IMS中暫無應(yīng)用，進(jìn)一步信息請參考RFC 3903。序號序號狀態(tài)碼狀態(tài)碼消息功能消息功能1XX臨時響應(yīng)表示已經(jīng)接收到請求消息，正在對其進(jìn)行處理，一次呼叫中臨時響應(yīng)可以有多個。100表示請求消息已收到，可以防止對局請求超時重傳。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183呼叫處理中2XX成功響應(yīng)表示請求已經(jīng)被成功接受、處理。200OK202Accepted，指示訂閱請求已被初步接受，但還需等到最終決策，最終決策將在NOTIFY請求中給出。進(jìn)一步信息請參考RFC 3265。3XX重定向響應(yīng)表示需要采取進(jìn)一步動作，以完成該請求。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客戶端錯誤表示請求消息中包含語法錯誤或者SIP服務(wù)器不能完成對該請求消息的處理。400錯誤請求401無權(quán)402要求付款403禁止404沒有發(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)端錯誤表示SIP服務(wù)器故障不能完成對正確消息的處理。500內(nèi)部服務(wù)器錯誤501沒實現(xiàn)的此處省略一些返回碼此處省略一些返回碼6XX全局故障表示請求不能在任何SIP服務(wù)器上實現(xiàn)。600全忙603拒絕604都不存在606不接受HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,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)承載建立對應(yīng)關(guān)系：QCIResource TypePriorityPacket Delay Budget Packet Error Loss RateExample Services1GBR2100ms10-2ConversationalVoice24150ms10-3ConversationalVideo(LiveStreaming)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會話進(jìn)行VoLTE語音通話進(jìn)行VoLTE視頻通話QCI9QCI5+QCI9QCI1+QCI5+QCI9QCI1+QCI2+QCI5+QCI9HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential9VOLTE總體流程總體流程HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential10目目 錄錄SIP簡介簡介總體流程總體流程VOLTE注冊流程注冊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:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential11VOLTE注冊流程注冊流程EPS attach（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緊接下來是否發(fā)起QCI5承載建立：Defaultbearer(GBR)QCI=8/9InternetAPNDefaultbearer(Non-GBR)QCI=5IMSAPNHUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.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(QCI5)RRC UL Information Transfer S1AP UL NAS TRANS RRC Connection Recfg CmpActivate Default EPS Bearer Context AcceptERAB SETUP RSP VOLTE注冊流程注冊流程EPS attach（2）無線側(cè)觀察QCI5承載建立流程：HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential13VOLTE注冊流程注冊流程IMS注冊注冊至此，手機已ready，可以正常呼叫了！Register:UE讀取USIM卡信息,向IMS發(fā)起注冊流程；401:CSCF從IMS-HSS獲取鑒權(quán)信息，發(fā)給UE；Register:UE發(fā)起第二個register信息，攜帶終端鑒權(quán)信息；200 OK:鑒權(quán)通過后，網(wǎng)絡(luò)側(cè)給終端返回注冊成功信息；QCI5建立成功后，UE將發(fā)起到IMS的注冊流程：HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential14目目 錄錄SIP簡介簡介總體流程總體流程VOLTE注冊流程注冊流程基本呼叫流程基本呼叫流程基本VOLTE呼叫掛機拆線短消息SRVCC流程流程Page14HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential15基本呼叫流程（基本呼叫流程（E2E）不同SIP交互，PCRF策略等會有不同的業(yè)務(wù)流程HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,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，手機呼叫接通！再往后就是QCI1 RTP語音包交換HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential17基本呼叫流程基本呼叫流程掛機拆線掛機拆線HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential18呼叫流程呼叫流程 時延定義時延定義Page18HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential19呼叫流程呼叫流程 時延定義時延定義(續(xù)續(xù))Page19主叫接通時延：Time(180ringing)-Time(InviteSDP)，從撥打電話到聽到振鈴的時間被叫接通時延：Time(ACK)-Time(200OKSDP)，統(tǒng)計的是摘機的時延。端到端呼叫建立時延=Time(180ringing)-Time(InviteSDP)+Time(ACK)-Time(200OKSDP)HUAWEITECHNOLOGIESCO.,LTD.Slidetitle:32-35ptColor:R153G0B0CorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialSlidetext:20-22ptBulletslevel2-5:18ptColor:BlackCorporateFont:FrutigerNextLTMediumFonttobeusedbycustomersandpartners:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential20目目 錄錄背景知識背景知識IMS域注冊流程域注冊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:ArialToprightcornerforfield-mark,customerorpartnerlogotypes.-Thefollowingninegroupsofcolorsareanexampleofhowourdesigncolorscanbeused,pleasetakenotethatyoushouldonlyuseonedesigncolorgroupperslide.Forspecificusagedetails,refertothe“TypesettingStandard”.HuaweiConfidential21SRVCC流程流程Page21TCopyright2011 Huawei Technologies 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.