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Development Scenario of SoftSwitchStandards in China and China Telecom’sConsiderations on Network EvolutionMs. Zhao HuilingChairperson of the Network and SwitchingTechnical Committee of CCSAVice President, Beijing Research Institute of ChinaTelecomxiecfxiecf
OutlineSoftSwitch Standards Development in CCSAChina Telecom’s Considerations on Network EvolutionChina Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf2
Development of SoftSwitch Industrial StandardsCCSA started to develop specifications and standards related tosoftswitch network in 2001, which include:Network equipment specifications and relevant testing specificationsNetwork protocol specifications and relevant testing specificationsSoftswitch-based interface specifications and relevant testing specificationsAccess equipment and terminals specifications and relevant testingspecificationsSoftswitch-based access management specifications and relevant testingspecificationsService architecture/API/service classification and general requirementsCCSA has published 59 series of softswitch specifications up to now.China Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf3
SoftSwitch Functional ArchitectureService creation APIsAAA ServerSNMPH.323Service ProvisionNetwork Management, BillingSSFInterworking FunctionAddress Resolution/RoutingSoftSwitch deviceSignalingGatewayNMS ServerTo be decidedRadiusSS7/IPApp. ServerSIPSIP SystemSIP/BICCINAP/IPCall Current INNO.7H.248MediaGatewaySIPTerminalChina Telecom Beijing Research .com.cnxcf4
Delivery of NGN ServicesPSTN ofpointviewviewPSTN /ISDNSimulationServiceIPMultimediaServiceRf/RoAPL GWI12UtShDhOther IP GCFIeSGFGq'RACFI1I3I4I6MRPFI2 ABGFLegacyteminalAMGFPacket TransportFunctionsI7PGFSGFTMGFMnResource an d Admission Con trol SubsystemI13MRFPPSTN/ISDNUECS basedChina Telecom Beijing Research InstituteMpGmT-MGFIP Transport (Access and Core)I-BGFIMS FIBCFMkMiMrMRCFIWF5Other IP Networkse2RFAGCFIwRf/RoMw« Core IMS »Other rk BorderASF(may include own Authentication, Authorization and Accounting)
CCSA’s Contribution to International StandardsChina submitted a total of 270 NGN-related contributions to ITU-TSG11/13/19/FG from 2005 to February 2006.The contributions cover a wide range of areas including servicerequirement, architecture, security, QoS, future bearer network,network evolution, signalling, FMC,and user database.The quality of contributions is improving. 19 draftrecommendations on international standards were developedbased upon China’s proposals. Breakthroughs were made in thefollowing areas:– Call server-based PSTN/ISDN Emulation: architecture andnetwork delivery.– Resources control, including signalling requirement andrelevant requirements– FMC: requirement and deliveryChina Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf6
AgendaSoftSwitch Standards Development in CCSAChina Telecom’s Considerations on Network EvolutionChina Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf7
China Telecom Status (by 2006.2)PSTN subscribers 154.5MPHS subscribers58.52MTotal: 213 MBroadband subscribers 22.43MChina Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf8
NGN Focuses at Different StagesNear-term: tappotentials and enhanceefficiencyMid-term: broadbandmgmt. and contr.Long-term: add valueMaturity of broadband managemenAnd control technologies andcompletion of IMS equipment testinDeployment of large-scale softswitchnetworkDeployment of small-scalesoftswitch networkCompletion of softswitchnational/corporate standards1.2.1.2.3.4.5.6.7.8.Softswitch equip.spec.MGW equip. spec.SIP spec.H.323 spec.H.248 spec.MGCP spec.Sigtran spec. 1.smart HLR trial200120032.soft switch networkstrial3.Interconnectiontesting andnetwork accesstesting3.Large-scale deploymentof smart HLR andsoftswitch networksRelations between IMSand softswitchIP backbone and IPMAN1.2.3.4.5.6.Control of broadbandvalue chainCompletion ofnational/corporate IMSstandardsIMS equipment testing,interconnection andnetwork access testingIMS trial deployment3G larges-scaleDevelopmentFMC and Multi ilitate the twork.China Telecom Beijing Research Institutehttp://www.ctbri.com.cn xcf9
Smart HLR Introduced to Fixed NetworkAPPAPP ServerServerSCPSCPSmart HLR systemINAP/SIP eg.MAP/Diameter－Core: SHLR－Switch,SoftswitchSHLRSHLRSHLR－Application platform－BSS/OSSExtend ISUP/ Extend MAPSwitchChina Telecom Beijing Research InstituteOSS/BSScomponents：Application PlatformSoftswitchhttp://www.ctbri.com.cnxcf10
Case of SHLRTrial and Operation in Fujian SubsidiaryOct. 2003 Initial trial in Quanzhou BranchOct. 2004 Commercial operation in Quanzhou BranchInvestmentJan. 2005 Full upgrade in Fujian SubsidiaryRMB/User*11.2New Services Provided4.5SHLR Platform Construction5.6Switch Software&Hardware Upgrade1.1Supporting System Re-constructionNote: * Users based on total local subs as of 2004China Telecom Beijing Research InstituteNumber PortabilitySimultaneous ringFixed-phone personal ring toneOne number Outcome as of Sept. 2005Over 470 thousand users, accounting foraround 4% of total local subscribersMore than RMB 32 million revenuehttp://www.ctbri.com.cnxcf11
China Telecom’s SoftSwitch StrategyDrives for evolution to softswitchSS7Long Distance NetworkRequirements ofPSTN capacity expansionRequirements ofAS ServicesIntegratedSGToll OfficeSoftswitchLocal NetworkTandem OfficeRequirements ofEnd TDMoffice Switch substitutionPOTS POTS POTSPOTS POTS POTSPSTNChina Telecom Beijing Research InstituteTGAG RequirementsIADofNew Subscriber expansionPOTS POTS POTS POTS POTSSoftswitch Networkhttp://www.ctbri.com.cnxcf12
SoftSwitch Network Structure of China TelecomDomain softswitchDomain softswitchBackboneIPCentral serviceplatformService platformService tswitch set centralized inseveral domainSoftswitch set centralizedDC2TmLsChina Telecom Beijing Research artHLRxcfSIP Phone13
Trial Commercial Services of China TelecomService nameVideoCommunicationIP CentrexUPTPersonal ToneWeb800UC(UnifiedCommunications)Main function tionforbroadbandShort-number service within broadband group subscribersFixed-line, PHS and mobile numbers are bound through UPT.UPT and Personal Tone can be bound or provided separately.‘PC-to-Phone’ 800 serviceCombines enterprise office system with telecom capabilities.Provides service features such as address book, point-topoint video, instant message, click-to-conference, etc.China Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf14
China Telecom’s NGN PracticeJuly 2001: Launched NGN softswitch trial projectJuly 2002 Jan. 2003: Conducted Phase 1 field trial and evaluatedmore than 2, 600 test items in 4 cities with products from 5 vendorsApr.2003 Dec.2003: Conducted Phase 2 field service tests,including API test, interoperability test, service experiment, trialrunning, etc.2004: Put NGN softswitch in trial commercial deployment inGuangdong, IPTV testing and commercial trial in 5 Province,2005: Put NGN softswitch into commercial operation on long distancenetworks and north China, deploy smart HLR in fixed network, IPnetwork “CN2” deployment2006 : focus on IMS solution for fixed operator and FMCChina Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf15
China Telecom’s Considerations on Network EvolutionPhase II: Transformation GoalsBasically FulfilledIntroductionofofIMSIMSandand IntroductionDevelopmentofofFMCFMCDevelopmentPhase I: StartupReconstructionofofIPIPbearerbearer Upgradeofofservicesservicessystemssystems snetworks2006Integrated andconverged rvice ccesses.accesses.2008China Telecom Beijing Research Institute2010http://www.ctbri.com.cnxcf16
Future Core Control Network: Substantive Progress Made forIMS StandardsNear-term: tap potentialsand enhance efficiencyMid-term: broadband mgmt.and contr.Long-term: add valueHSSENIPSIP ASS-CSCFI-CSCFGartner 2005 ReportAGCFMSANP-CSCFMGCFTMG323 PHONEENIPSIP ASSHLRC5 SSC4 SSMSANTMGSIP PHONESIP/323 PHONEAccording to Gartner, IMS will become mature in 2 to 5 years.According to Gartner, IMS will become mature in 2 to 5 years.IMS is a better core network architecture for multimedia broadband users and softswitch is a mature control core of voice networks.IMS is a better core network architecture for multimedia broadband users and softswitch is a mature control core of voice networks.China Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf17
NGN Is a Controllable ArchitectureTelecom operators is seeking for solutions that cancontrol IP networks.Providing operations with capabilities to control andmanage IP-based networks and servicesNetwork convergence capabilities - IMSFlexible extension and combination in the serviceplaneAccess control, ID and management in the useraccess plane – NASS and RACEChina Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf18
IMS Is the Future Platform of ConvergenceAdoption of SIP signaling as call control, enhanced servicecontrol capability.Better openness and higher degree of standardizationIMS is the future network architecture, which can improvethe controllability and manageability of IP stream. IMSarchitecture is design for service control and convergence.Wireless and wire line access have a single core network, acentralized user database in the network layer, anintegrated billing system and service development platform,a unified services authentication architecture and automaticroaming abilities through nationwide network.China Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf19
Considerations on IP MANIdentify levels, enhance functions, standardize equipment and focus uponperformanceClear Network levels. The separation of layer 2 and layer 3, construction of a clear 3layered routing network (backbone metropolitan area network) and a 2-layeredaccess network (broadband access network).Flat network structure. Reducing the physical and logic cascade progression of IPMAN through backbone MAN having large capacity and a small number of nodes andbroadband access network having wide coverage.Differentiation of network quality. Differentiate service mechanisms through IP MANand provide differentiated services of varied QoS for different services and users.Concentration of management and control. Construct a clear service access controllayer to have a centralized management and control of services BRASs and SRs.Standardization of equipment requirements. The functions and performance of newequipment must be able to meet the management requirements of the MAN.China Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf20
Unified User DatabaseUnified user database is a logic entity, It realizes centralized storage and usage ofuser data based upon user databases of service networks.Logic centralization. Data can be stored and used in a centralized way through theintroduction of a logic data layer and distributed database technology. All networkshave to go through the access gateways to access the integrated user database.Unified user databaseLDAPOther userdatabaseSHLR .Other userdatabaseHSSHLRDiameterINAPSIP/API SIPPSTN/PHSsoftswitchSIPSS7AGIMSPLMN3G RadioNetworksIADNeed further studyChina Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf21
THANK YOUChina Telecom Beijing Research Institutehttp://www.ctbri.com.cnxcf22
Future Core Control Network: Substantive Progress Made for IMS Standards According to Gartner, IMS will become mature in 2 to 5 years. IMS is a better core network architecture for multimedia broadband users and softswitch is a mature control core of voice networks. According to Gartner, IMS will become mature in 2 to 5 years.
