3G通讯的发展与应用趋势（英文版）(ppt 46)

3G通訊的發展與應用趨勢技術篇ContentsBasicConceptofMobileSystemDevelopmentofMobileCommunicationGSMNetworkArchitectureCDMANetworkArchitectureObjectivesUnderstandthedevelopmentof3GNametheconceptofthethreedifferentmultipleaccesstechnologiesandunderstandwhereeachbeusedUnderstandtheIMT-2000systemOncompletionofthissectionwillbeableto:Year2000andLaterBetterVoiceServiceHighRateDataAccessMoreValue-addedServiceLargeCapacityHigherSpectrumEfficiencyMoreSafeServiceLowOperationCostHighQualityVoiceHighSpeedMobileAccessMultiMedia,E-CommercePersonalizedServiceNewRequirement90sBetterVoiceServiceSomeValue-addedServiceLargeCapacityLowOperationCostEnhanceSpectrumEfficiencyHighQualityVoiceLowerDataServiceShortMessageCurrentRequirementEarlierRequirement80sVoiceServiceCapacityBasicVoiceService,VoiceQualityOperatorCustomerDifferentPeriod,DifferentRequirementDifferentRequirement,DifferentTechnology3GprovidescustomersandoperatorswithcompleteintegratedservicesolutionsAMPSTACSNMT其它Generation1inthe1980sAnalogAnalogtechnology(l)GSMCDMAIS95TDMAIS-136PDCGeneration2inthe1990sDigitalDigitaltechnologyVoiceserviceGeneration3IMT-2000UMTSWCDMAcdma2000TD-SCDMABroadbandserviceMultipleAccessTechnologiesUser1User2User3TimeFrequencyFDMATimeFrequencyCodeCDMAUser3User2User1Basedoncodes,allusersobtaintrafficchannelsatthesametimeandonthesamefrequencyband,forexample,WCDMAandCDMA2000Trafficchannelsondifferentfrequencybandsareallocatedtodifferentusers,forexample,AMPSandTACSTrafficchannelsatdifferenttimeslotsareallocatedtodifferentusers,forexample,DAMPSandGSMUser1User2…TimeFrequencyTDMAUser9User10…Objectivesof3GGloballyuniversalfrequencybandandstandard,globalseamlesscoverageHighlyeffectivespectrumefficiencyHigherqualityofservice,securityandreliabilityEasytosmoothlydevelopandtransitfrom2G,compatiblewith2GinareversedirectionProvidingmultimediaservices,withtherateofupto2Mbps–Vehicleenvironment:144kbps–Environmentforwalk:384kbps–Indoorenvironment:2MbpsIMT-2000TechnicalSpecificationSystem3GSystemWCDMACoreNetwork：BasedonMAP&GPRSRTT：WCDMA－FDD/TDDTD-SCDMARTTSpecification：TD-SCDMAOthersystems:EDGEDECTCDMA2000Network：BasedonANSI41&MAPRTT：CDMA2000ComparisonoftheThreeModesWCDMAcdma2000TD-SCDMAStructureofthereceiverRAKERAKERAKEClosedloopPowercontrolSupportedSupportedSupportedHandoffSoft/hardhandoffDemodulationmodeCoherentdemodulationChiprate(Mcps)3.84N*1.22881.28ModeoftransmitdiversityTSTDSTTDFBTDOTDSTSNoModeofsynchronizationAsynchronousSynchronousAsynchronousCorenetworkGSMMAPANSI-41GSMMAPCoherentdemodulationCoherentdemodulationSoft/hardhandoffSoft/hardhandoffContentsBasicConceptsofMobileSystemDevelopmentofMobileCommunicationGSMNetworkArchitectureCDMANetworkArchitectureObjectivesOncompletionofthissectionthestudentwillbeableto:NamethedataservicesUnderstandthe3locationservicesDataServices032649.61281443842,000VideoStreamingVoiceTextMessagingStillImagingAudioStreamingElectronicnewspaperHigh-qualityvideoconferenceTelephone(Voice)VoiceMailE-MailFaxElectronicbookSports,newsandweatherreportondemandSingingroomLow-qualityvideoconferenceJPEGStillPhotosMobileRadioVideoSurveillance,VideoMail,TravelImageDataWeather,transportation,news,sportsandsecuritiesMobileTVE-commerceRemoteMedicalServiceDevelopmentorientationofanetworkThereare3locationtechnologystandards:LocationServicesGPS-aidedmeasurementAccuracy:Suburbs---10mCity---30~70mIndoor—unabletolocateResponsetime:3~10sMeasurementofbasestationpilotphaseAccuracy:50~200mResponsetime:3~6sLocatingofacellIDAccuracy:dependsonthesizeofacellResponsetime:within3s110!Bandit!•Thesystemtransferstothenearestalarmprocessingcenterbasedonthelocationinformationoftheuserreportinganalarm.•Analarmbuttoncanbesetonauser’smobilephonetoachievethegoalofreportinganalarmwithoutanyconversation.LocationServicesContentsBasicConceptsofMobileSystemDevelopmentofMobileCommunicationGSMNetworkArchitectureCDMANetworkArchitectureObjectivesNamethefrequencyspectrumusedinGSMNametheserviceareaNamethetwodifferentcelltypesandunderstandwhyandwheneachwouldbeused.Nametheconceptoffrequencyreuse.UnderstandtheCharacteristicofradiocommunicationOncompletionofthissectionwillbeableto:TheDivisionOfRadioFrequencyDifferentfrequencyhasdifferentpropagationcharacteristicsTheDivisionOfRadioFrequency300-3000GHzEHFExtremelyHighFrequency30-300GHzSHFSuperHighFrequency3-30GHzUHFUltraHighFrequency300-3000MHzVHFVeryHighFrequency30-300MHzHFHighFrequency3-30MHzMFMediumFrequency300-3000KHzLFLowFrequency30-300KHzVLFVery-lowFrequency3-30KHzVFVoiceFrequency300-3000HzELFExtremelyLowFrequency30-300Hz3-30HzDesignationClassificationFrequencyIMT-2000FrequencyAssignment185019001950200020502100215022002250ITUEuropeUSAMSSPCSADBBCDCEFAFEMSSReserveBroadcastauxiliary2165MHz1990MHz1850190019502000205021002150220022501880MHz1980MHzUMTSGSM1800DECTMSS1885MHz2025MHz2010MHzIMT2000MSSUMTSJapanMSSIMT2000MSSIMT2000PHS18951918BC1885AA’2170MHzIMT20002110MHz2170MHzMSSMSSCDMATDDWLLFDDWLL19802025MHzGSM1800CDMAFDDWLL196019201945Chinacellular(1)cellular(2)cellular(2)1805MHz186518651870188518901895191019301945196519701975TheFrequencyS