(BT英国电信)NGN的发展-技术和管理

EvolutionofNextGenerationNetworks(NGN)-TechnologyandRegulatoryIssuesSatyenGuptaChiefRegulatoryAdvisor,SAARCRegion,BTGlobalServicesAgenda•NGN-Introduction•AdvantagesofNGN•NextGenerationNetworkArchitecture•RegulatorychallengesforNGN•PSTNevolutiontoNGN•NGNMigration–BTUKExample•NGN–KeyMessagesNGN-IntroductionNextGenerationNetworksasthenamesuggestsarethenetworksoffuturebasedonemergingtechnologyofIPwhichisleadingtoconvergenceofnetworks,servicesandmarketsandprovidingefficiencyandflexibilityinOperation.NGNarebasedonthelayeredapproachwhereinservicesprovisionisseparatedfromthenetworkinfrastructure.TheseareenablingtheoperatorstoincreasetheirdepletingARPUbyprovidingmultipleandadvancedvalueaddedservicesinadditiontoplain(vanila)voice.TheincumbentoperatorsaregoingforNGNbyreplacingtheirexistingnetworkstocompeteonthetechnologyfrontandbeingabletoprovidenewvalueaddedservices,cutdownonOpexaswellastomaketheirnetworkfuture-proof.NextGenerationNetwork(NGN)isapacket-basednetworkabletoprovideservicesincludingTelecommunicationServicesandAbletomakeuseofmultipleBroadband,QoS-enabledtransporttechnologiesinwhichservice-relatedfunctionsareindependentfromunderlyingtransport-relatedtechnologies;Itoffersunrestrictedaccessbyuserstodifferentserviceproviders.Itsupportsgeneralizedmobilitywhichwillallowconsistentandubiquitousprovisionofservicestousers.DefinitionofNextGenerationNetwork(ITU)Broadly,NGNshouldmeetthefollowingtechnicalrequirements:(i)Separationofinfrastructureandservicelayers.(ii)Accesstechnologyagnostic.(iii)Supportquad-play(voice,data,video,mobile)services.(iv)OpenStandardArchitecture.(v)IntegratedUsersInterface.(vi)Co-existencewithPSTN.(vii)MeetingQOSstandards.(viii)Compliancetoregulatoryandsecurityconditions.NGN–TechnicalRequirementsAdvantagesofNGNNGNmakesuseofbestofboththeworlds(Flexibility,Efficiency&InnovativenessofIPandQOS,Security,Reliability,Customer-friendlyfeaturesofprovenPSTN.•AdvantagesforserviceprovidersReducedCAPEXduetointegratedandefficientIP-basedtechnology(PacketizeorPerish)ReducedOPEXduetotransmissioncostsaving,lesspowerconsumption,lessspacerequirement,lessO&McostsAbilitytoofferincreasedrangeofservicesMoreflexibilityincreasingmarketpenetrationbyofferingpersonalservicecustomizationandmanagementSinglenetworklayerformanagementNoneedforseparatenetworksforvoice,dataandvideo•AdvantagesforsubscribersReducedcallchargesNewinnovativeservicesatafastspeedSingleconnectionandbillforvoice,data,video,mobile(Quadplay)EmergingNGNServices–EOIPVoiceoverIPUnifiedMessagingBB-HighSpeedInternetPrimarylineContentDeliverySecondlineGamingIPCentrexusageDownloads(MP3)IPVPN(data)VoiceVPNBWon-demandIPCentrexVideoondemandQOSondemandPCtoPhonePhonetoPCIPTVQuadplay(voice,data,video,mobility)InstantmessagingPresencemanagementMultimediaConferencingLongdistancebypass(DeathofDistance)MMSonfixednetworkLocationBasedServices(LBS)FMC(FixedMobileConvergence)Distancelearning3G&beyondapplicationsFixedMobileConvergence(FMC)FMCisconvergenceofaccessfortelephonywhereinaspertheconvenienceoftheusersanmobilecallcanbedeliveredonfixedphoneorcanbeterminatedthroughfixedBroadbandnetworkonmobilephone.Mainmotivationforthisis:-1.SpectrumshortageleadingtocongestionandreducedQoS.(Itisbelievedthat70%ofthetimeamobilecallrecipientisonafixedlocation/HotSpot)2.Mobilesubscriberssaturation,Fixedlinesdecline(Battleforin-buildingminutes)3.Broadbandbecomingubiquitousandcosteffective4.The“MobileHandset”isbecomingamulti-purpose,multi-band,palm-heldcomputer5.NGNTechnologiesenablingFMC(IMS,UMA)GatewaysInternetWirelessPOTSIntegratedServicesOverIPEvolvingtowardsFlatAllIPCommunicationsNextGenerationNetworks(NGN)PresentDayNetworksNextGenerationNetworks–TechnologicalEvolutionInterfacesSwitchingCallControlApplication&ServiceControlServerIPRoutingGatewaysPSTNSwitchNGNComponentsNGNv/sPSTN-90degreeshiftSDHTransportwithOverlaypacketsfordataCommonIPMPLS/EthernetTransportNGN–alayeredarchitecturedistributingintelligenceateverylayerApplicationLayerControlBearerServiceControlLayerSoftswitchControlIPServiceSwitchingApplicationServicesTransportLayer(coreandaccess)PSTNInternetMultiservicePacketSwitchingXXXXXCORENETWORKSXNationalOpticalBroadbandAccessGbEDSLAMACCESSNETWORKRASFrame/ATMWirelessCPEMediaGatewaysMetroOpticalXXXXCoreIP/MPLSNetworksUserSchematicviewofNGNDSLASPNetworkWEBASPNetworkVoDDOCSISIMSMMSGSMWi-FiAccessTransportServicesSIPPSTNPSAP(公共安全回答地点)NetworkE911(紧急求援)Source:ASTAP05/WS-IP&NGN/13NGN-FunctionalPlanesManagementPlaneApplicationPlaneControlPlaneTransportPlaneSCNNextGenerationNetworksfunctionaldecompositionintofiveplanes.1.Thecontrolplanecontainsthefunctionalityrelatingtothecontrolofthetransportplaneandinter-workingwiththeSCN(CircuitSwitchNetwork).ThecontrolplanearchitectureisintendedtobeIP-accessnetworkindependent.2.ThemanagementplanecontainsthemanagementfunctionalityrelatingtoQoS,Securityandnetworkmanagement.3.Thetransportplanecontainsthefunctionalityrelatingtotheunderlyingpackettransportandservices.4.TheSCNplanecontainsthefunctionalityrelatingtothecircuit-switchednetworks.5.Theapplic