信息通信：From Cellu也lar Network to Access Network(PPT)

FromCellularNetworktoAccessNetworkWhatWehaveRead…Reference:–WirelessCommunicationsPrinciplesandPratice(2Ed)–WCDMA移动通信技术–––(VisitorMSC)PSTNMSC-1(HomeMSC)HLRAuCVLRHLRAuCVLRUserbecomesaroamerBSBSHomeMSCDatabaseVisitorMSCDatabaseHLR：HomeLocationRegisterVLR：VisitorLocationRegisterAuC:AuthenticationCenterTheAirInterfaceisAnalog,but…CompanderPre-emphasisFilterDeviationLimiterPostdeviationLimiterFilterFrequencyModulatorInputVoiceSignalRFCarrierOutputRFSignalIntheAirInterfaceMobileUserBaseStationMSCReverseVoiceChannelForwardVoiceChannelReverseSetupChannelForwardSetupChannelVoiceCircuits9600bpsDatalinkTheMSC-SS7/PSTN-MSCisDigitalIS-41SS7CustomerProfileHLRSS7IS-41AssignedTDNVLRPacketDataSS7signalnetworkPSTNVisitorMSCSo,HowToTransmitdigitizedata?...WehaveT1/E1standardsForVoicedata----ThroughPSTNincircuitswitching,and…PrivateBranchExchangeCentralOffice(CO)TandemSwitchLocalLoopIXC1IXC2IXC3OtherCOsForSignal/Controldata-----SignalingSystemNo.7(SS7),inpacketswitchingMSCSMSSTPsSTPsSTPsSTPsSEPsSEPsNetWorkANetWorkBSS7SS7SS7SS7SS7SS7TootherSEPsSEP:SwitchingEndPointsSTPs:SignallingTransferPointsSMS:ServiceManagementSystemSS7:SignalSystemN0.7OtherthanPSTN,WecanuseX.25,ISDN,B-ISDN,ATMISDNSubsciberISDNInterfacePacketSwitchingCircuitSwitchingCommonChannelSignallingISDNInterfaceISDNSubsciberHeaderData5bytes48bytesTheSecondGenerationCellularSystem----GSM,architectureBTSBTSBTSBSCBTSBTSBTSBSCHLRVLRAUCMSCOMCPSTNISDNDateNetwork(Internet,ATM)BaseStationSubsystemNetworkSwitchingSystePublicNetworkGSMRadioAirInterface(Standardize)AbisInterface(Standardized)SS7AInterface(Standardized)TheThirdGenerationCellularSystem:WCDMA,architectureNodeBNodeBNodeBNodeBRNCRNCMSC/VLRGMSCHLRSGSNGGSNPLMNPSTNISDNDataNetwork(e.g.Internet)USIMMEGuUuIubIurIuAGbRANUTRAFDDAirInterfaceProtocolArchitectureMACPHYRRCPDCPPDCPBMCRLCRLCRLCRLCRLCRLCRLCRLC复用处理L1L2MACL2BMCL2PDCPL3OtherAccessNetworkTechniquesCompetingwiththe3G----Wi-Fix