阿尔卡特朗讯-陈端-基于P2P对等技术的信息服务架构

1、基于P2P对等技术的信息服务架构SDD Chen Duan内容P2P和P2P SIP技术基于P2P体系的信息服务架构P2P体系架构的价值定位结论Whats P2P and P2P SIP?Peer-to-Peer (P2P) Architecture: An architecture in which nodes (peers) cooperate together to perform tasks. Each node has essentially equal importance and performs the same tasks within the network. Additi

2、onally, nodes communicate directly with one another to perform tasks. Occasionally, nodes with better resources (such as not being behind NATs) may have a more significant role.P2P-SIP: The use of the Session Initiation Protocol (SIP) in settings where the service of establishing and managing sessio

3、ns is principally handled by a collection of intelligent endpoints, or P2PSIP peers, rather than centralized servers as in client-server SIP as currently deployed. ApplicationTransportNetworkData linkPhysicalApplicationTransportNetworkData linkPhysicalApplicationTransportNetworkData linkPhysicalP2P

4、Overlay NetworkP2P over SIPUser interface (buddy list, etc.)SIPICERTP/RTCPCodecsAudio devicesDHT (Chord)On startupDiscoverUser locationMulticast REGPeer found/Detect NATREGREG, INVITE,MESSAGESignup,Find buddiesJoinFindLeaveOn resetSignout,transferIM,callSIP over P2PVoIP, VideoPresenceIMFile Transfer

5、TCP/IPP2P ApplicationsP2P Overlay NetworkInternetDHT LayerIETF P2P-SIP: StandardizationONONSNSNP1P1+P2P3P13 ProtocolsP1: C/S Registrar ProtocolRegistration (put)Lookup (get)Incl. authenticationP2: P2P DHT ProtocolDHT / overlay managementP3: P2P SignalingSIP (in pure end-to-end mode)Definition of pro

6、xy-less basic SIP services2 Node TypesON: Ordinary NodesP2P-SIP ClientsSN: Super NodesP2P-SIP Peers, offering resourcesPeerClient内容P2P和P2P SIP技术基于P2P体系的信息服务架构P2P体系架构的价值定位结论P2P-SIP Architecture (IETF)Example: Skype System ArchitectureSkype is built forMinimum server loadNo network resourcesHighest sc

7、alability at lowest costMedia relay on clients: Legal problem, Scalability issues with thin clientsUser database on clients: Security problemServicePeerA Lightweight P2P VoIP / MMoIP Architecture Platform for Valuable ServicesUser DatabaseRGWSW Appl.IMSPSTNGW PeerRegister & User LookupP2P-SIP(proxy-

8、less)Other: HTTP/SOAPSignaling: P2P-SIPMedia: RT(C)PNAT-TraversalMgISCMn, IaSIPPOTSNATPSTN & SIP/IMS Peering ()MGC / MGW / I-CSCFSIP P2P-SIP AdapterNetworked Services ()Web ServerIMS Application ServerClient ManagementUser Data BaseProfilingAdvertisingClient ManagementSW UpdatesRemote ConfigurationW

9、ebServices3GPP / TISPAN IMS ( A complex SIP architecture )IMS-MGWUEIPv6 PDN(IPv6 Network)MGCF PDFI-CSCFS-CSCFBGCFApplication(SIP AS,OSA AS, CAMEL SE)MRFCMRFPMRFBB(IP v4/IPv6)P-CSCFSGWOSA SCSIM SSF SIP AS ASRANBGIMS Session SignallingIMS User Plane Data HSSIMS Data SLFALGTrGWIMS GWIPv4 PDN(IPv4 Netwo

10、rk)IPv4 based SignallingIPv4 User Plane DataPEFCSCFHLR/AuC (CS/PS)3gpp R5WLANPDGUEWLAN WAG 3gpp R6GGSNSGSNCS Networks(PSTN, CS PLMN)BASUEDSLAM 3gpp R7 / TISPAN R1SPDF/ A-RACFNASSA General Comparison: Lightweight Hybrid P2P, P2P-SIP and IMSLightweight Hybrid P2PDiscount while keeping operator assets

11、Outsourcing of functions to clientsPure P2PNo security / integrity guaranteesNo central application deploymentRegulatory issuesServices / Applications P2P Call ControlSubscriber Self-ManagementSubscriberManagementServices / ApplicationsIMS Call ControlNGN/IMS TelecommunicationAll-embracing multi-tie

12、r infrastructureOperated Subscriber ManagementHosted Applications / ServicesP2P Call Control内容P2P和P2P SIP技术基于P2P体系的信息服务架构P2P体系架构的价值定位结论FixedCoreMobileCoreTDM/RJ11VoiceTDMVoiceNGN Voice UMASIP based VoIPNGN voice IMRBroadband & SIP based VoIPTransport / Back-officeIMS-CoreConvergedMultimediaPre-IMS 2

13、003 2004 2005 2006 2007 2009TISPAN, CableLabs3GPP, 3GPP2Where we are todayEvolution of Network ConvergenceFrom vendors point of view Operators Interest and Alcatel-Lucents offerClientsSIP Security (ACME)Call Control(incl. suppl. Services)Database(Subscr. + Apps.)Firewalls (non SIP)ApplicationsPSTN P

14、eeringOSS/BSSIP Access & TransportVoIP OfferAlcatel Overall OfferNot neededin P2P SIPLegacy interworking is demanded and generates valueImportant interface towards my customers.Customer data is key for revenuesStandards & history say: “You need this.”Applications and content generate valueMy operati

15、onal teams demand this to protect the call control.Operator RequirementsAlcatel-Lucent OfferInternet Business ModelBroadband Internet AccessP2P conversational service, presence, IM, some supplementary services, . (largely terminal based)FreePaidOffnet/ PSTN interworkingPaidVoice boxPaidSPIT* firewal

16、l and other securityPaidIntelligent Mobile RedirectPaidSTB Telecom DashboardPaidVirtual Secretary(IVR/UMS)PaidPersonal Ringing (Ringback) TonesPaidAudio on DemandPaidPush To TalkPaidBundles!Enhanced PresencePaidEnhanced Suppl. ServicesPaidOperator Assisted ServicesPaid Internet business model: Basic

17、 voice is free!P2P-SIP offerscall control at lowest costVery dynamiccreation of new bundlesBB Access and BB VoIP Take RateDell Oro Group worldwide forecast:2005 BB Subscriber: 190 M BB VoIP: 20 M (10% take rate)2009 BB Subscriber: 370 MBB VoIP: 50.130M (15.35% take rate)Millions of Broadband VoIP su

18、bscribersAlcatel Corporate Strategy (March 2006):2009 VoIP Subscriber: 187,6 M% of BB subs: 39 % of households:11 % soft clients / P2P:49 %内容P2P和P2P SIP技术基于P2P体系的信息服务架构P2P体系架构的价值定位结论Adoption Lifecycle & Hype Cycle 革新者早期采用者早期的大多数采用者后期的大多数采用者落后者Organization & Governance Chasm Immature standards & tool

19、s Chasm Detailed Biz case & Reference Chasm “Reuse”- Heard it all before Chasm Education Chasm 幻灭低谷技术启动复苏上扬稳定发展过度期盼IMSP2P-SIPSSInternet Lightweight VoIP and IMSIMS Call ControlCall ServerBorderElement(ACME)IP PhonesP2P-SIPPeersIP Access / TransportIMS= Migration of Telephony and ApplicationsMigratio

20、n Path for IncumbentsIntegration with Legacy Networks and Telephony ServicesCross Domain QoS + RoamingControlled Fixed/Mobile AccessLightweight Internet VoIP Low OPEX Competitive to GAMEYs (Google, Amazon, MSN, EBay, Yahoo)New Cost Efficient Call Routing (P2P)Operator Added Value beyond Voice:Fast Web Integration of ApplicationsScalable Global User CommunitiesUser DBUser DB P2P-SIP to “User Centric Broadband”Service Aware Edge& Data Aware OpticsBusinessEnvironmentAny ContentEvery Terminal, EverywhereEach UserConsumerEnvironmentIntegrati