1、电信传输研究所赵慧玲 电信网络技术的发展3/1/20211电信网络技术的发展 RITT 赵慧玲为信息产业部研究发展策略，技术体制,规范和标准，测试和任证。为电信运营公司提供技术支持：进行设备选型和技术咨询。例如：IN，SS7，ISDN，同步网，编号，SDH，WDM，接入网，帧中继，多媒体，ATM，IP，IP电话，GSM，CDMA，高速讯呼和IMT2000。 电信传输研究所3/1/20212电信网络技术的发展 RITT 赵慧玲图1 我国电信网的构成 公用无线数据网B-ISDNFRNX.25DDNN-ISDNPSTN业务网支撑网No.7信令网同步网电信管理网传送网话音平台智能网公共业务平台电子邮件
2、/传真存储转发/EDI语音信息台多媒体信息服务台IP网移动网3/1/20213电信网络技术的发展 RITT 赵慧玲Annual RevenueAnnual IncomeNote: Level 3 had high Extraordinary Revenues in 1998 that more than compensated the Loss on Ordinary Operations shown in this chartMCI Worldcom Revenue mixAT&T revenue mix AT&T revenue mix was the following in 1998:
3、 Business services: 23,611 Million USD (or 44% of the revenue) Consumer services: 22,885 Million USD (43%) Wireless services: 5,406 Million USD (10%) Other services: 1,321 Million USD (2%) AT&T is just starting to introduce Broadband & Internet Services in their reporting. These accounted for 3.4% o
4、f their revenues in the 1Q99. Voice:91-9292-9393-9494-9595-96Main telephones in service: +36%+51%+57%+49%+35% Data:Number of Internet hosts: - - -+277%+820%Number of PCs: -+37%+55%+44%+42% ConclusionThere is still a lot of growth in traditional voiceThe revenues largely come from the voice traffic T
5、raffic volume growth of voice and dataThe China figures, as proposed by ITU3/1/20218电信网络技术的发展 RITT 赵慧玲Expected growth of Voice-over-IP By 2002, VoIP is expected to be 10.8% of total voice traffic(national+ international) (Internet + IP managed networks) For China the forecast is 1.2% in 2002; 4.5% i
6、n 2005Traditional voice has to be supported for a lot ofTraditional voice has to be supported for a lot of years ! years !Source: IDC/Link BCG analysisSource: OVUM Report123Segmentation of operatorsBased on the backbone protocol Established operators looking for very open multiservice networksFor da
7、ta: use of ATM backbone to transport IP andFRFor voice: optimization of circuit networks (ATM backbone, voice over SDH, trunking of VoATM and VoIP in the existing network)Full support of existing services and introduction of new services New telecom operators continuing ATM deployment, carrying IP,
8、Voice and Frame Relay Internet service providers and new entrants asking for pure IP switching backboneATM and IP deployment in the backboneExisting voice networkintegration on ATMmigration to IPATMmigration to IPIP deployment132The choices of some US operatorsATM, ATM/IP or IP Established operators
9、, focusing on ATM (multi-service networks)RBOCs (Ameritech, Bell Atlantic, Bell South, SBC Communications, US WEST), MCI, GTE , IXC, AT&T, (Sprint (ION): no voice yet) New entrants, focusing on ATM (delayed migrating to IP)Williams, Qwest New entrants focusing on pure IP backbones (managed IP networ
10、ks)Level 3, Frontier, UUNet132宽带平台和接入的技术焦点IP over ATM/SDH/FIBER观点之一：G交换路由器优化光纤网络新一代网络集话音、视频和数据为一体；带宽“第一目标”，其它次要地位，提高竞争力；统一IP，不必顾及多业务，可解决QOS；避免ATM的复杂和开销，降低复杂性；CIPOA、LANE在实时业务时不能保证QOS；成本降低几十倍；利用HFC，STB和Cable Modem是IP产品适合城域网；电话业务的价格提供多媒体信息服务。3/1/202113电信网络技术的发展 RITT 赵慧玲宽带平台和接入的技术焦点IP over ATM/SDH/FIBER
11、观点之二：ATMSDH完善的QOS；业务的灵活性：IP、实时和其它业务；综合效益高；符合公网发展方向，在全球大量采用；G交换路由器仅适合纯IP骨干；新技术和新协议发展快、风险大，可局部试验；面临管理、工程、学术等不同问题。3/1/202114电信网络技术的发展 RITT 赵慧玲3、面临的可能挑战（1）IP带来的技术挑战QOS，COS的提供策略（IP-Qos、ATM-Qos）；标准的把握：CIPOA，MPLS，RSVP，Signaling等等；Integrated Services，Differentiated Services；Multicast；xDSL引入策略（PVC、SVC、PPP、Ce
12、ll/IP at desk等等）；技术试验的内容、范围、方式和步骤；宽带业务的引入策略。3/1/202115电信网络技术的发展 RITT 赵慧玲3、面临的可能挑战（2）业务挑战宽带业务（近期的选择）：接入：xDSL/Cable Modem/Ethernet/ATM25;终端：TV、PC;应用：IP/Cell/WebTV（Web、Video、Multicast）；服务：管理性、可靠性。3/1/202116电信网络技术的发展 RITT 赵慧玲 新形势对电信网的要求新形势对电信网的要求(1)(1)1).目前的电信网是为电话设计的，正在改造以便 传数据和图象。未来的趋势将主要按数据业务来 设计网络，但
13、可用来传电话，数据和图象业务。 对现有电路交换网的改造是不可避免的！ (例子：Cisco总工的预言)- 象WorldCom这样的少数新兴电信公司的网络数据 业务量已超过电话，而象AT&T,US Sprint等传统电话公司的网络数据业务量也将在2005年左右超过电话业务量3/1/202117电信网络技术的发展 RITT 赵慧玲- 大型电信公司都在调整部署，削减传统公用电信网部门，加强数据通信特别是IP产品部门（例子：爱立信）2).TCP-IP将成为电信网的主导的上层通信语言3).必须保证网络端到端的服务质量（QoS），为此核心网部分必须引入SDH+ATM并保证其可用性与电话网相当。4).电信网的
14、大趋势是逐步实现分组化，无连接化和全球寻址，最终形成一无缝的IP网络结构！新形势对电信网的要求(2)3/1/202118电信网络技术的发展 RITT 赵慧玲5) 必须暂时放弃端到端ATM连接的理想，用户处将 以以太网/快速以太网和IP接入为主6) 铜缆接入网必须改造，出路光纤+无线7) 为应付IP及其他业务引起的巨大压力,以WDM技 术为代表的下一代大容量光网络建设势在必行， 长途主干线上应开始应用新一代光纤，各种IP 业务的旁路技术也大有市场8) 对电信公司，实现电话和数据的融合是首要任 务，下一步才是多媒体，三网融合是长远目标新形势对电信网的要求(3)3/1/202119电信网络技术的发展
15、 RITT 赵慧玲 下一代网络New public network (NPN)新的公用网Unified network 一体化网Continuously upgrable network 可持续发展的网络R/S3/1/202120电信网络技术的发展 RITT 赵慧玲Core Network Migration for IPPremium Service= Money-Making= Controlled QoSRegular Best Effort = Not Money-Making= Suppress InvestmentAccessNetworkAccessNetworkIP/ATM “
16、Premium” Servicesw/ Controlled QoSIP/SONET or WDM Regular Best-Effort ServicesIP Core Network3/1/202121电信网络技术的发展 RITT 赵慧玲可持续发展网络的基本要求可支持现有和将有的所有业务具有巨大的可持续扩容的链路容量和节点容量, 因而物理层一定是以WDM为基础，以OADM与OXC为节点的光传送网TCP-IP将成为主导的上层通信语言， 但不完全排除其他通信协议，因而可同时支持现有电路交换网，ATM网，以太网和宽带IP网具有很高的网络和业务生存性最终将是以IP为基础的无缝融合的网3/1/202
17、122电信网络技术的发展 RITT 赵慧玲电话网网关数据核心网 IP/ATM/SDH/Optical接入服务器以数据为主的未来网络结构以数据为主的未来网络结构Internet大企事业居民接入服务器RR ATM SW3/1/202123电信网络技术的发展 RITT 赵慧玲IP over OpticalIP over OpticalIP over SDHIP over SDHIP over ATMIP over ATM未来的未来的IPIP分层传送网分层传送网3/1/202124电信网络技术的发展 RITT 赵慧玲Multi-Services Data-Centric Network VisionP
18、OTSISDNPSTNSignalingGatewayPOTSIPAccessServerxDSLResidentialGatewayOther BusinessMUXEdgeSwitch RADIUS Servers Billing Servers Name Servers Data VPNSessionManagersNetworkManagementService andBusinessManagementNetworkDatabasesPSTNFeaturesServersResourceServersNetwork and Service ManagementRASPOTSISDNP
19、OTSISDNOC3xDSLRemoteAccessServerVoiceATMLANsNIUNIUFixed WirelessBusiness WirelessPacketCircuitGatewayFirewall.InternetPSTNSDH/OpticalCore Network IP/ATM/SDH/Optical3/1/202125电信网络技术的发展 RITT 赵慧玲7R/E ArchitectureAny VendorsTandem orLong DistanceOfficeVoice/Data/Video Multi-Service Packet NetworkSS7 Net
20、workSTPATM/IP Core NetworkATIXCEOFeatureServersMulti-MediaResourceServerOneLinkOAM&PManagerSCPPacketGatewaysAny VendorsEnd OfficePacketGatewaysFull Range ofNarrow & BroadBand Circuit & Packet AccessFull Range ofNarrow & BroadBand Circuit & Packet Access3/1/202126电信网络技术的发展 RITT 赵慧玲 How packet network
21、s can provide voice services that are competitive with circuit switched networks7R/E is.7R/E Multi-Service SolutionATIXCEOPacketGatewaysAny VendorsEnd OfficePacketGatewaysFull Range ofNarrow & Broadband Circuit & Packet AccessPacket NetworkFeatureServerOneLinkOAM&PManagerMulti-MediaResourceServerFul
22、l Range ofNarrow & Broadband Circuit & Packet Access3/1/202127电信网络技术的发展 RITT 赵慧玲7R/E is.7R/E Packet Local Solution How other vendors end-office switches can use lower cost packet transport and provide new IP/ATM based features & servicesPacket NetworkCircuit NetworkTrunkAccessGatewayLineAccessGatewa
23、yFeatureServerOneLinkOAM&PManagerMulti-MediaResourceServer3/1/202128电信网络技术的发展 RITT 赵慧玲Circuit Network7R/E is. How tomorrows tandems are built to virtually eliminate tandem congestion and exhaust7R/E Packet Tandem SolutionPacketGatewaysPacketGatewaysFeatureServer(s)OneLinkOAM&PManager)3/1/202129电信网络技
24、术的发展 RITT 赵慧玲7R/E is. How the 5ESS is transformed into a 7R/E to achieve rapid feature creation and almost unlimited scaleability 7R/E Packet Driver(5ESS to 7R/E transformation)AMLineUnitsSM2000SMPTrunkUnitsPacketGatewaysOneLinkOAM&PManagerHub/BridgeorSwitch/RouterPacketGatewaysPacketGatewaysLineUni
25、tsSM2000SMPTrunkUnitsLineUnitsSM2000SMPTrunkUnitsCM2FeatureServer(sMulti-MediaResourceServer3/1/202130电信网络技术的发展 RITT 赵慧玲7R/E is. How circuit and packet networks will off-load dial-up data traffic and offer remote access services7R/E Dial-up Data Solution(MultiServicesModule)Packet Networks(IP/FR/ATM
26、) PublicInternet ISPInter-OfficeCircuit Networks MSMMSMMSMMSM3/1/202131电信网络技术的发展 RITT 赵慧玲Core Data Network TodayIP and non-IP traffic is carried over ATM/SDH coreConnections between routers are at sub-OC-3 ratesATM switches aggregate trafficOptical Line Systems are deployedllIP/ATMATMSwitchATMSwitch
27、ATMSwitchATMSwitchRouterRouterRouterNon-IPData SourceNon-IPData SourceIPData SourceIPData SourceSDHDCS/ADMSDHDCS/ADMSDHDCS/ADMOptical Line SystemNon-IPData Source3/1/202132电信网络技术的发展 RITT 赵慧玲Core Data Network TomorrowWhile network grows, routers and switches are addedRouters that are interconnected v
28、ia OC-3 pipes or higher can use IP/SDH interfaces.ATM traffic aggregation at the edges of the network will continueATM switching and SDH XC integrated in one NEIP/SDHlATMSwitchlATMSwitchATMSwitchSDHDCS/ADMSDHDCS/ADMSDHDCS/ADMSDHDCS/ADMRouterRouterRouterRouterRouterRouterSDHDCS/ADMIPData SourceIPData
29、 SourceIPData SourceATMSwitchSDHDCS/ADMRouterRouterNon-IPData SourceNon-IPData SourceATMSwitchRouterNon-IPData SourceSDHDCS/ADMOptical Line System3/1/202133电信网络技术的发展 RITT 赵慧玲Routers that are interconnected via OC-48 pipes or higher can use IP/WDM interfacesRouters perform the interworking function b
30、etween IP/ATM, IP/SDH and IP/WDMCore Network - BeyondllIP/WDMlRouterRouterRouterRouterRouterRouterIP/SDHSDHDCS/ADMSDHDCS/ADMRouterRouterRouterRouterATMSwitchATMSwitchRouterRouterATMSwitchATMSwitchSDHDCS/ADMSDHDCS/ADMSDHDCS/ADMSDHDCS/ADMSDHDCS/ADMSDHDCS/ADMRouterRouterRouterATMSwitchNon-IPData Source
31、IPData SourceIPData SourceIPData SourceNon-IPData SourceOptical XC/ADMOptical XC/ADMOptical Line SystemOptical Line System3/1/202134电信网络技术的发展 RITT 赵慧玲PSTNATMPSTNATMPSTN ExchangeATM ExchangeEWSD BroadbandNodeEWSD BroadbandNode -Changing Broadband Network Scenario3/1/202135电信网络技术的发展 RITT 赵慧玲Local Netw
32、ork with EWSD BroadbandNodeEWSD OAMincl.ATM and DSLATMPSTNSS7RemoteSiteRemoteSiteEWSDBroadbandNode 3/1/202136电信网络技术的发展 RITT 赵慧玲EWSD BroadbandNode -Embedding in Existing NetworksLegacyNodeorConcentratorLocal Exch.EWSDInnovation NodeEWSDInnovation NodeTrunk Exch.SDHPHDLUSDH/PDHRSU Remote Switching Uni
33、tDLU Digital Line UnitPHPacket HubFRFrame RelayBroadbandPSTN/ISDNRSUother ATM/FR networkMSP stand aloneATM switche.g. 36170/36190BroadbandPSTN/ISDNDLUPHPH3/1/202137电信网络技术的发展 RITT 赵慧玲E-Cube NGS Adaptation to Hybrid SolutionAnalog/ N-ISDNATM UNIProcessorProcessorIP/ATMIP/ATMMPLSLabelmappingSTMModuleIW
34、UFETEX-150 E-CubeLAN3/1/202138电信网络技术的发展 RITT 赵慧玲E-Cube ATM Switch with MPLSMPLS ModuleLDP: Label Distribution ProtocolOSPF : Open Shortest Path FirstBGP-4: Border Gateway Protocol Ver.4BSGC: Broadband Signaling ControlPVC: Permanent Virtual ConnectionBCPR : Broadband Call ProcessorAPI: Application P
35、rogram InterfaceFETEX-FETEX-150150 ATM UNILineLineLineAPI BCPRBSGCAPIRoutingProtocols IP data connection LDP,BGP-4,OSPF signaling connection Routing signaling (OSPF,BGP-4) termination ( Management IP routing table) LDP termination (Label assignment: Management of IP address and Label (VPI,VCI) infor
36、mation) Order of connection set up via API ATM termination AAL termination Relay of API information API information Communication with MPLS module through API (Software) Connection setup Management of connection information Connection setupOSPF/BGP4/LDPVCI map SetupSetupOC-3SwitchOSPF,BGP-4,LDP3/1/2
37、02139电信网络技术的发展 RITT 赵慧玲E-Cube NGS Adaptation to ATM-centric SolutionFETEX-150 E-CubeAnalog/ N-ISDNATM UNISTMModuleATMModuleProcessorIP/ATMIP/ATMIWUIPMLAN3/1/202140电信网络技术的发展 RITT 赵慧玲E-Cube Local SwitchL2TP (Access Concentrator) Allows subscribers to select ISPs Aggregates IP packet for the same desti
38、nationSTMATMResidentialPower UserSOHOG.LiteADSLHDSL/SDSLDSLAMISPISPInternetBackbonePOTSIP/ATMIP/ATMPOTSPOTSIP/ATME-Cube NGS Local SwitchL2TPDSLAM3/1/202141电信网络技术的发展 RITT 赵慧玲Telecom Network Migration 1Circuit SwitchesLegacy Voice STMLegacy Voice STM3/1/202142电信网络技术的发展 RITT 赵慧玲Telecom Network Migratio
39、n 2ATM PlaneATM PlaneLegacy Voice STMLegacy Voice STMMobileMobileMSCBSC3/1/202143电信网络技术的发展 RITT 赵慧玲Telecom Network Migration 3IP/ATM w/MPLSIP/ATM w/MPLSLegacy VoiceLegacy VoiceMobileMobileMSCBSCISPATM VoiceATM VoiceTandemTandemIP Router NetIP Router Net3/1/202144电信网络技术的发展 RITT 赵慧玲Telecom Network Mig
40、ration 4VoiceVoiceTandemTandemIP Core Layer #1IP Core Layer #1MPLSMPLSISPBSCMSC“Best Effort”“Quality” IPIP EdgeIP EdgeLayerLayer3/1/202145电信网络技术的发展 RITT 赵慧玲Telecom Network Migration 5VoiceVoiceTandemTandemIP CoreIP CoreLayer #1Layer #1MPLSMPLSISPBSCMSCIP EdgeIP EdgeLayerLayerAPIIntegratedAccess SWNe
41、tworkServer/Agent Clusters3/1/202146电信网络技术的发展 RITT 赵慧玲Alcatel 1000 S12Alcatels transition strategy S12 Narrowband S12 NarrowbandHandles NB services (POTS and ISDN)RSUARCUDSNNB controlvoice (E1: 2 Mb/s)voice (POTS/ISDN)1Alcatel 1000 S12Alcatels transition strategy S12 with MPSR and SDH S12 with MPSR
42、and SDH linksNB services over BB transportAvailability: 1998RSUARCUNB controlvoice (E1: 2 Mb/s)VoSDHDSNvoice (STM-1 VC-12: 155 Mb/s)voice (POTS/ISDN)MPSR2Alcatels transition strategy Only narrowband services, few ATM links S12 with ATM links and NB/BB transport interworkingOffer integrated VoATM and
43、 VoIP depending on the position in the networkAlcatel 1000 S12RSUARCUVoIP and IP(AAL-5: 155 Mb/s)VoIPRANNB controlvoice (E1: 2 Mb/s)voice (POTS/ISDN)VoATM (AAL-1: 155 Mb/s)InternetVoATMDSNmobile voice(AAL-2: 155 Mb/s)3Alcatels transition strategy Broadband services and lot of ATM links S12 with SDH
44、links, ATM links and NB/BB interworkingOffer BB services, plus integrated VoATM and VoIP, depending on the position in the networkAvailability: 2000Alcatel 1000 S12RSUARCUIP (ATM: 155 Mb/s)DSNVoIPRANVoSDHNB controlvoice (E1: 2 Mb/s)voice (STM-1: 155 Mb/s)voice (POTS/ISDN)voice, data (ATM: 155 Mb/s)M
45、SANADSLInternetBB controlVoATMMPSRATM4Alcatel 1000 S12Alcatels transition strategy S12 in a Multi-Service network S12 in a Multi-Service networkBSCA2G Access3G AccessSTM1/4NetworkServicesFeatures / Directory CAccessControlPSTNBISDNAnalogBRAATM 25 Mb/sor 10 Mb/s Ethernet NTMxDSL NTxDSLOther Servers(b
46、illing,etc.)Call ServerG3BSCIuMSANInternetIP routerATM services: - AAL1, AAL2, AAL5 - SVC, PVCDSNVoIPRANNB control BB controlVoATMVoSDHMPSR5SPRINT UNVEILSREVOLUTIONARY NETWORKHigh-Speed, High-Bandwidth,Multi-Function Capabilities Over Single Phone LineNEW YORK, June 2, 1998 - Sprint announced today
47、a revolutionary new telecommunications capability that can provide homes and businesses with virtually unlimited bandwidth over a single existing telephone line for simultaneous voice, video calls and data services.Building the New World New architecture for deploying voice, video, and data services
48、 Makes us of ATM, IP, and DSL technologies Switched voice services Internet, intranet, and extranet services Broadband to the home and small business Fault tolerant High quality Flexible3/1/202153电信网络技术的发展 RITT 赵慧玲Sprint ION ArchitectureSprintPOPSprintPOPIP+ATMLocalAccessTelecommuterSOHOResidentialR
49、emote Office, Branch OfficeEnterpriseSprintPOPInternet AccessPSTN Multi-Service Mux in CPECiscoMGX8800CiscoMGX8800DS1 andNxDS1Cisco6xxDS3/OC-3Cisco3810Cisco26/3600CPEDS1Intra-City ATMLECPOPInternetPOPPOPxDSLDS1xDSLIP+ATMEdgeCiscoRouterIP+ATMCorePSTNGWIP+ATMBackbonePSTN NetworkMulti-ServicesRouter3/1
50、/202155电信网络技术的发展 RITT 赵慧玲TGW, AGWDGWSGW, MGC, SENMSWCSWRCSprint ION ModelSuccession Network - All Distance Network TDMTDMSwitchSwitchTDMTDMSwitchSwitchTDMTDMSwitchSwitchTDMTDMCoreCoreSPMSPMSPMSPMSTM1STM1XA-CoreXA-CoreDMSDMSSTM1STM1DS1DS1SPMSPMTandemTandemSDMSDM Delivers key set of local and long dis
