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1、單擊此處編輯母版標(biāo)題樣式,單擊此處編輯母版文本樣式,第二級,第三級,第四級,第五級,*,Agenda,EPC,介紹,EPC,關(guān)鍵技術(shù)介紹,EPC,業(yè)務(wù)流程介紹,EPC,的標(biāo)準(zhǔn)化進(jìn)展,3,1,可行性研究階段,2004,年,12,月正式立項至,2006,年,6,月完成。主要是網(wǎng)絡(luò)結(jié)構(gòu)優(yōu)化的可行性研究，,輸出的基準(zhǔn)協(xié)議是,3GPP,TR 23.882:3GPP system architecture evolution(SAE):Report on technical options and conclusions,2,Stage1,（需求階段）,定義,SAE,的需求，,2006,年,12,月完成,

2、輸出的基準(zhǔn)協(xié)議是,3GPP TS 22.278:Service requirements for evolution of the system architecture:,3,Stage2,（技術(shù)實現(xiàn)階段）,定義,SAE,的網(wǎng)絡(luò)結(jié)構(gòu)、功能實體及其相互接口。,2008,年,6,月完成,輸出的基準(zhǔn)協(xié)議包括：,3GPP TS 23.401:General Packet Radio Service(GPRS)enhancements for Long Term Evolution(LTE)access“,3GPP TS 23.402:3GPP System Architecture Evolutio

3、n(SAE):Architecture enhancements for non-3GPP accesses,4,Stage3（協(xié)議實現(xiàn)階段）,定義各接口上的具體協(xié)議。200,9,年,3,月完成,當(dāng)前,定義的協(xié)議有,：,3GPP TR 24.801:3GPP System Architecture Evolution(SAE);CT WG1 aspects,3GPP TR 29.803:3GPP System Architecture Evolution(SAE):CT WG4 aspects,3GPP TR 29.804:3GPP System Architecture Evolution(

4、SAE):CT WG3 aspects,3GPP,標(biāo)準(zhǔn)組織與制定階段,階段,1,：需求,SA1/NGMN,階段,2,：結(jié)構(gòu),EPS by SA2,LTE by RAN3,階段,3,：詳細(xì)實現(xiàn),EPC,CT1/3/4,SA3/5/5,LTE,RAN1/2/3/4/5,SA3/5,RAN1-,物理層,RAN2-L2,與,L3,無線協(xié)議,RAN3-,結(jié)構(gòu)與,S1/X2,接口,RAN4-RF,與,RRM,性能要求,RAN5-,終端測試,EPC,主要協(xié)議介紹,TS,23.401,GPRS enhancements for E-UTRAN access,TS,23.402,Architecture enh

5、ancements for non-3GPP accesses,TS,23.203,Policy and charging control architecture,TS,23.216,Single Radio Voice Call Continuity(SRVCC),TS,23.272,CS fallback in Evolved Packet System(EPS)Stage 2,TS,33.401,3GPP SAE Security architecture,TS,33.402,3GPP SAE Security aspects of non-3GPP accesses,EPC Arch

6、itecture(3GPP Standard),SGSN,HSS,MME,SGW,PGW,BSC,RNC,BTS,NodeB,eNodeB,Operators Services,PCRF,Control plane traffic,User plane traffic,EPC,S6d,S6a,S3,S4,S10,S11,S1-MME,S1-U,S5(GTP),Rx,Gx,SGi,SAE-GW:,SGW+PGW,HSS,MME,SAE-GW realize LTE access and interworking with Non 3GPP network.,Based on GTP mobili

7、ty,S4 SGSN support legacy UTRAN&GERAN access.,Based on MIP mobility,ePDG/AAA/PCRF increase network QoS and security.,Flat,Architecture,Access Agnostic,Separation of control plane from user plane,and all IP,ePDG,S2b,S2a/c,Non 3GPP,Access Network,S10 x,S10 x,3GPP,CS Core,Mobility based on,MIP,Handover

8、 Optimization,6,EPC,主要接口介紹,接口,協(xié)議,協(xié)議號,相關(guān)實體,接口功能,S1-MME,S1AP,36.413,eNodeB-MME,用于傳送會話管理,(SM),和移動性管理,(MM),信息,S1-U,GTPv1,29.060,eNodeB S-GW,在,GW,與,eNodeB,設(shè)備間建立隧道，傳送數(shù)據(jù)包,S11,GTPv2,29.274,MME S-GW,采用,GTP,協(xié)議，在,MME,和,GW,設(shè)備間建立隧道，傳送信令,S3,GTPv2,29.274,MME SGSN,采用,GTP,協(xié)議，在,MME,和,SGSN,設(shè)備間建立隧道，傳送信令,S4,GTPv2,29.274

9、,S-GW SGSN,采用,GTP,協(xié)議，在,S-GW,和,SGSN,設(shè)備間建立隧道，傳送數(shù)據(jù)和信令,S6a,Diameter,29.272,MME-HSS,完成用戶位置信息的交換和用戶簽約信息的管理,S10,GTPv2,29.274,MME-MME,采用,GTP,協(xié)議，在,MME,設(shè)備間建立隧道，傳送信令,S12,GTPv1,29.060,S-GW UTRAN,在,UTRAN,與,GW,之間建立隧道，傳送數(shù)據(jù),S2a,PMIPv6/MIPv4,RFC5213,P-GW Trusted Non-3GPP IP,Accesse,用于傳送非,3GPP,接入的業(yè)務(wù)接入信息,S5/S8,GTPv2,2

10、9.274,S-GW P-GW,采用,GTP,協(xié)議，在,GW,設(shè)備間建立隧道，傳送數(shù)據(jù)包,支持,3GPP,接入，,EPC,新增網(wǎng)元的主要功能點,MME,Serving GW,PDN GW,NAS,信令處理,NAS,信令的安全保護(hù),3GPP,內(nèi)不同節(jié)點之間的移動性管理,空閑移動終端的跟蹤和可達(dá),TA List,管理,PDN GW,和,Serving GW,選擇,MME,和,SGSN,的選擇,合法監(jiān)聽,漫游控制,安全認(rèn)證,承載管理,eNodeB,之間的切換的本地錨點,E-UTRAN,空閑模式下數(shù)據(jù)緩存以及觸發(fā)網(wǎng)絡(luò)側(cè),Service Request,流程,合法監(jiān)聽,數(shù)據(jù)包路由和轉(zhuǎn)發(fā),上下行傳輸層數(shù)據(jù)

11、包標(biāo)記,基于用戶和,QCI,力度的統(tǒng)計（用于運營商間計費）,基于用戶、,PDN,和,QCI,力度的上行和下行的計費,基于用戶的包過濾,合法監(jiān)聽,IP,地址分配,上下行傳輸層數(shù)據(jù)包標(biāo)記,PCC,non-GBR,的基于,AMBR,的下行速率控制,GBR,的基于,MBR,的下行速率控制,DHCPv4,和,DHCPv6,（,client,、,server,）,上行和下行的承載綁定,上行承載綁定校驗,類似,SGSN,的控制面功能,類似,SGSN,的用戶面功能,類似,GGSN,的功能,TA(Tracking Area)List,移動管理優(yōu)化,TA List1,TA List2,Idea of TA Lis

12、t,All the tracking areas in a Tracking Area List to which a UE is registered are served by the same serving MME.,The MME may initiate the GUTI Reallocation procedure to reallocate TAI list at any time when a signaling association is established between UE and MME.,The TAI list may also be reallocate

13、d by the Attach or the Tracking Area Update procedures,The UE doesnt need trigger TA update procedure when the UE moves in the same TA List.,The Tracking Area Identity is constructed from the MCC(Mobile Country Code),MNC(Mobile Network Code)and TAC(Tracking Area Code).,TA 1,TA 2,TA 5,TA 4,TA 3,MME,I

14、SR(Idle Signaling Reduction),移動管理優(yōu)化,TA1,TA3,RA3,TA2,TA4,TA5,RA1,RA2,TA List1,TA List2,ISR,Combined Area=TA List+RA,The UE doesn,t need trigger TA update procedure when it moves in the combined area.,ISR is not recommended to deploy in commercial phase because of its complexity and less benefits.,Com

15、bined area,RA4,IPv4v6,雙棧（,Dual Stack,）,EPS,承載處理,IPv4v6,承載的優(yōu)勢,承載類型,LTE,2/3G,備注,IPv4,Y,Y,UE,獲取,IPv4,地址轉(zhuǎn)發(fā),IPv4,報文,Ipv6,Y,Y,UE,獲取,IPv6,地址轉(zhuǎn)發(fā),IPv6,報文,IPv4v6,Y,Y/N,UE,獲取,IPv4,和,v6,地址和轉(zhuǎn)發(fā),IPv4,和,v6,報文,解決在1個PDP上下文中傳送IPv4和IPv6地址的用戶數(shù)據(jù)，減少,了需要的承載,上下文數(shù)量,終端,SGSN/MME,PDN-GW,根據(jù),終端,的能力在請求建立,的承載類型,具備,IPv6,和,IPv4,能力請求,I

16、Pv4v6,IPv4,終端請求,IPv4,IPv6,終端請求,IPv6,終端能力不明，請求,IPv4v6,MME/SGSN,根據(jù),如下,條件，向,PGW,請求標(biāo)示,Dual Stack Flag,UE,是否簽約,Dual Stack,，,否則拒絕，否則返回給,UE,“,subscription limitation,”,UE,是否可能切換到不支持,IPv4v6,網(wǎng)絡(luò)，是則返回給,UE,“,single address bearers only,”,PGW,檢查如下條件，判斷是否接受,Dual Stack,請求,若不允許該,APN,使用兩個,IP,地址，則只分配一個,IP,地址，并返回給,UE,“,network preference,”,如果允許該,APN,使用兩個,IP,地址，則分配,IPv4,地址和,IPv6,地址，接受請求,R8,網(wǎng)絡(luò),IPv4v6,雙棧承載的處理方式,LTE,與,2/3G,承載之間要求一對一映射,EPC,網(wǎng)絡(luò)的安全優(yōu)化,UE,eNB,eNB,Xu,Xu,MME,S,1,-,C,S,1,-,C,X,2,Evolved Packet Core,(,EPC,),E,-