基站测试规范要求及测试原理概览c2kevdo.ppt

1of49 MT8820A E H 1 2 00 CDMA基站测试 1CDMA物理层介绍2CDMA基站测试项目31xEVDO介绍4EVDO基站测试项目 cdma2000Evolution IS 95 IS 95 A TIA EIA 95 B J STD 008TSB 74 cdma20001xRelease0 cdma20001xReleaseA cdma20001xReleaseB cdma20001xReleaseC cdma20001xReleaseD cdma20003x cdma20001xEVDO Rev0 cdma20001xEVDO RevA cdma20001xEVDO RevB 1CDMA物理层 CDMA CodeDivisionMultipleAccess 标准 IS 95AIS 95A B 2G移动通信标准也称为cdmaOne IS 2000IMT 2000的一种3G通信标准也被称为cdma20001xEV DORelease01xEV DO被规划用于优化数据传输 最高可支持2 4Mbps的传输速率 支持多媒体业务如MP3 video等传输1xEV DOReleaseA1xEV DORelease0的升级 CDMA20001xEV DORevA可提供更高数率的上下行连接 前向最高可达到3 1Mbps 反向最高1 8Mbps RevA在载波带宽不变的情况下 1 25MHz 也提供了更高的小区容量 多种RF信道带宽快速前向链路功率控制前向链路发送分集Turbo码技术反向链路相干解调灵活的帧长cdma系统时间多选择的长交织器 1CDMA物理层 关键技术 扩频速率 SpreadingRate SR SR1 前向和反向cdma信道在单载波上都是采用码片速率为1 2288Mcps的直接序列扩谱 SR3 前向信道有3个载波 每个载波的码片速率为1 2288Mcps 反向信道在单载波上采用码片速率为3 6864Mcps的直接序列扩频无线配置 RadioConfiguration RC RC是指一系列前向或反向业务信道的工作模式 每种RC支持一套数据速率 其差别在于物理信道的各种参数 包括各种调制特性和扩频速率等无线传输技术 RadioTransmissionTechnology RTT 1CDMA物理层 SpreadingRate1andSpreadingRate3 1CDMA物理层 CDMAChannelGeneration 1CDMA物理层 CDMACarrier CellularBand 1CDMA物理层 CDMACarrier CellularBand CDMACarrier 30KHz 283 42Channels 304 261 1CDMA物理层 CDMACarrier PCSBand 1 25MHz 1 25MHz ReverseCDMAChannel ForwardCDMAChannel 80MHz Frequency ChannelFrequency 251851 25MHz 251931 25MHz 1CDMA物理层 CDMACarrier PCSBand CDMACarrier 50KHz 25 25Channels 1CDMA物理层 RadioConfigurations RadioConfiguration AsetofForwardTrafficChannelandReverseTrafficChanneltransmissionformatsthatarecharacterizedbyPhysicalLayerparameterssuchastransmissionrates modulationcharacteristics andspreadingratecdma2000RadioConfigurations RC1throughRC9ontheForwardlinkRC1throughRC6ontheReverselink 1CDMA物理层 ForwardLinkRadioConfigurations 1CDMA物理层 ReverseLinkRadioConfigurations 1CDMA物理层 快速前向链路功率控制 移动台在检测了前向链路的Eb N0后送出功率控制比特功率控制比特与反向导频信道复用功率控制比特不进行编码 避免编码 成帧和解码等造成的时延功率控制速率是固定的800次 秒 1CDMA物理层 前向链路的发送分集 多载波发送分集 MCTD 对于MC方式 不同的天线采用不同的载波正交发送分集 OTD 对于DS方式 可以通过分离数据流 采用正交序列扩展两个数据流来完成 1CDMA物理层 ForwardLinkChannelFunction PilotChannelThemoststrongestandmostobvioussignal about15 oftotalpower Providesaphasereferenceforcoherentdemodulation ProvidesmultipathdetectionforRakereceiver Provideameansforsignalstrengthcomparisonsbetweenbasestationsfordeterminingwhentohandoff DiversityPilotChannelThepilotchannelandthe发射分集导频信道 transmitdiversitypilotchannel providephasereferencesforcoherentdemodulationofforwardlinkCDMAchannelswhichemploytransmitdiversity AuxiliaryPilotChannelAnauxiliarypilotchannelisrequiredforforwardlinkspotbeamandantennabeamformingapplications andprovidesaphasereferenceforcoherentdemodulationofthoseforwardlinkCDMAchannelsassociatedwiththeauxiliarypilot TransmitDiversityPilotChannelAtransmitdiversitypilotchannelassociatedwithanauxiliarypilotchannel 1CDMA物理层 ForwardLinkChannelFunction DedicatedControlChannelCo existwithothertrafficchannelsTransmitUpperLayerSignaling MACmessages andRLPframesProvidesConduitformessaginginsteadofFundamentalChanneldim blankandburstBroadcastControlChannelBroadcastonlyoverheadmessagesandSMSmessages removestheoverheadmessagesfrompagingchanneltoaseparatechannelQuickPagingChannelSignalsentbyabasestationtoinformmobilestationsoperatingintheslottedmodeduringtheidlestatewhethertoreceivethePagingChannelstartinginthenextForwardPagingChannelframe 1CDMA物理层 ForwardLinkChannelFunction SyncChannelTransportsthesynchronizationmessagetothemobilestation PagingChannelTransmissionofcontrolinformationandpagesfromabasestationtomobilestations Broadcastsystemmessages channel andneighborpilotsinformationtoMS9600or4800bps 20msframedurationForwardCommonControlChannelandBroadcastControlChannelTransmissionofdigitalcontrolinformationfromabasestationtooneormoremobilestations CommonAssignmentChannelUsedbythebasestationtoacknowledgeamobilestationaccessingtheEnhancedAccessChannelorReservationAccessMode CommonPowerControlChannelTheCommonPowerControlChannelisusedbymobilestationsoperatinginthePowerControlledAccessModeorReservationAccessMode 1CDMA物理层 ReverseLinkChannelFunction AccessChannelCommonchannelsusedforcommunicationoflayer3andMACmessagesfrommobiletobasestation TheAccessChannelisusedforshortsignalingmessageexchanges suchascalloriginations responsestopages andregistrations ReversePilotChannelAssiststheBStodetectaMStransmissionProvidescontinuouschannelestimationandreverselinkpowercontrolforforwardlink RC3toRC6 PreambleofR EACH R CCCH andR TCHReverseDedicatedChannelCo existwithothertrafficchannelsTransmitUpperLayerSignaling MACmessages andRLPframes 1CDMA物理层 ReverseLinkChannelFunction ReverseEnhancedAccessChannelWorkinginmodes BasicAccessMode mode andReservationMode closedlooppowercontrolFramedurationshallbe20 10 or5msindurationUsedjointlywithR CCCHwhenworksinReservationModeReverseCommonControlChannelUsedforthetransmissionofuserandsignalinginformationtoBSwhenReverseTrafficChannelsarenotinuse Twomodes ReservationmodeandDesignatedmodeVariabledataratesof9 6 19 2 and384 Kbps20 10 or5msinframedurationEachR CCCHisassociatedwithasingleF CCCH 1CDMA物理层 2Cdma基站测量标准 C S0010 C Cdma基站测试项目 频率覆盖频率稳定度相位精度波形质量子信道前向功率控制平均功率测量导频功率测量码域功率测量带外杂散发射互调占用带宽 Cdma测试注意事项 确保输入正确的频点 Input RF 注意仪表的最大输入电平 安全操作Forward RC1 2 IS95基站 Forward RC3 5 2000基站确保输入正确的频点 2Cdma基站测量 FrequencyToleranceDefinitionFrequencytoleranceisdefinedasthemaximumalloweddifferencebetweentheactualCDMAtransmitcarrierfrequencyandthespecifiedCDMAtransmitfrequencyassignment Thistestshallapplytoeverybandclassthatthebasestationsupports MinimumStandardForalloperatingtemperaturesspecifiedbythemanufacturer theaveragefrequencydifferencebetweentheactualCDMAtransmitcarrierfrequencyandspecifiedCDMAtransmitfrequencyassignmentshallbelessthan 5 10 8ofthefrequencyassignment 0 05ppm 2Cdma基站测量 PhaseToleranceDefinitionPilotChanneltocodechannelphasetoleranceisthepermissibleerrorinRFphasebetweentheradiatedPilotChannelandtheotherchannelswithinoneForwardCDMAChannel MinimumStandardThephasedifferencesbetweenthePilotChannelandallothercodechannelssharingthesameForwardCDMAChannelshouldnotexceed0 05radiansandshallnotexceed0 15radians 2Cdma基站测量 Waveformquality DefinitionWaveformqualityismeasuredbydeterminingthenormalizedcorrelatedpowerbetweentheactualwaveformandtheidealwaveform MinimumStandardForallbasestations thenormalizedcrosscorrelationcoefficient shallbegreaterthan0 912 excesspower0 97 2Cdma基站测量 TotalPowerDefinitionBasestationtotalpoweristhemeanpowerdeliveredtoaloadwithresistanceequaltothenominalloadimpedanceofthetransmitter MinimumStandardThetotalpowershallremainwithin 2dBand 4dBofthemanufacturer sratedpower 2Cdma基站测量 PilotPowerDefinitionThePilotChannelpowertototalpowerratioisthepowerattributedtothePilotChanneldividedbythetotalpower andisexpressedindB MinimumStandardThePilotChannelpowertototalpowerratioshallbewithin 0 5dBoftheconfiguredvalue 2Cdma基站测量 CodeDomainPowerDefinitionCodedomainpoweristhepowerineachcodechannelofaCDMAChannel MinimumStandardIfthebasestationsupportsRC10 themeancodedomainpowershallbe31 5dBormorebelowthetotalmeanoutputpower 2Cdma基站测量 SpuriousEmissionsDefinitionConductedspuriousemissionsareemissionsatfrequenciesthatareoutsidetheassignedCDMAChannel measuredatthebasestationRFoutputport MinimumStandardRefertoSpec 2Cdma基站测量 Inter BaseStationTransmitterIntermodulationDefinitionInter basestationtransmitterintermodulationoccurswhenanexternalsignalsourceisintroducedtotheantennaconnectorofthebasestation Thistestverifiesthatbasestationconductedspuriousemissionsarestillmetwiththepresenceoftheinterferingsource MinimumStandardThebasestationshallmeettheconductedspuriousemissionrequirements 2Cdma基站测量 OccupiedBandwidthDefinitionTheoccupiedbandwidthisdefinedasthefrequencyrange wherebythepowerofemissionsaveragedoverthefrequencyaboveandundertheedgefrequencyare0 5 eachofthetotalradiationpowerofamodulatedcarrier MinimumStandardTheoccupiedbandwidthshallnotexceed1 48MHzforSpreadingRate1and4 6MHzforSpreadingRate3 3EVDO介绍 EVDO介绍 1xEV DO主要优化了数据传输 其峰值速率2 4Mbps并支持多媒体如MP3 videoconferencing的传输 1xEV DOintroducessometerminologythatdiffersfromcdma2000 AccessTerminal AT Amobiledeviceequippedwitharadiomodemandadatainterface allowingtheusertoaccessapacketdatanetworkthroughthe1xEV DOaccessnetwork AccessNetwork AN Thisnetworkequipmentperformsthesameroleasabasestation providingdataconnectivitybetweenapacket switcheddatanetworksuchastheinternetandtheATs ForwardLinkPhysicalChannel ARQ TDMofForwardLinkChannel Data 400chips RPC RAB DRCLock RPC RAB DRCLock ActiveSlot 64 RPC RAB DRCLock Pilot 96 64 RPC RAB DRCLock Data 400chips Data 400chips 64 Pilot 96 chips 64 Data 400chips chips 1024chips halfslot 1024chips halfslot Systemtime 1Slot 8Slots 1slot 1 667ms 1 2frame 13 33ms Frame 26 67ms 16Slots 4Slots 2Slots 4slot 6 66ms 2slot 3 33ms IdleSlot ReverseLinkPhysicalChannel Reverse Channels Pilot Medium Access Control Data ReverseRate Indicator RRI DataRate Control DRC Pilot Data Traffic Access Ack AuxiliaryPilot DataSource Control DSC ReverseLinkFrameStructure ReverseLinkFrameStructure cdma20001xEVDORev0 Optimizedsupportfordownlinkintensive asymmetric delay tolerantapplicationsWebbrowsing FileTransfer WAPetcGoalsCapacityandCoverageEnhancementSupportforQoSCapacityEnhancementForwardLink2 4MbpspeakdataratePhysicalLayerH ARQMulti userdiversityschedulerDiversityreceptionReverseLink153 6KbpspeakdatarateReverserateiscontrolledbyseveralfactors cdma20001xEVDORevA PhysicalLayerImprovedsupportforQoS sensitiveservicesRapidconnectionsetupwithimprovedterminalbatterylifeHigherrateaccesschannel upto38 4kbps withshorterpreamble 4 slots Shortinter transmitintervaloncontrolchannelShortpacketcontrolchannel 4 slots inIdlestateEfficientresourceallocationforbothlowlatencyanddelaytolerantdatasourcesANcontrolledtradeoff perflow betweencapacityandlatencyFinerratequantizationAdditionaldataratesonForwardLinkandReverseLinkLatencytargetdetermineseffectivedatarateImprovedpackingefficiencyMulti userpacketsonForwardLink AsinglephysicallayerpacketcancarrydataformultipleATsHigherpeakdatarates3 1MbpsonForwardLink 2 45Mbpsin1xEVDORev0 1 8MbpsonReverseLink 153 6Kbpsin1xEVDORev0 EVDO基站测试标准 C S0032 A EVDO基站测试 测试项目FrequencyCoverageFrequencyTolerancePilotChannelTimeToleranceWaveformQualityRPCChanneltimeResposeForwardTrafficChannelResponsetoACKChannelTotalOutputPowerPilot MACChannelPowerCodeDomainPowerConductedSpuriousEmissionsInter SectorTransmitterIntermodulationOccupiedBandwidth EVDO基站测试 FrequencyCoverageFrequencyToleranceDefinitionThefrequencytoleranceisdefinedasthemaximumalloweddifferencebetweentheactualCDMAtransmitcarrierfrequencyandthespecifiedCDMAtransmitfrequencyassignment Thistestshallapplytoeverybandclassthatthesectorsupports MinimumStandardForalloperatingtemperaturesspecifiedbythemanufacturer theaveragefrequencydifferencebetweentheactualCDMAtransmitcarrierfrequencyandspecifiedCDMAtransmitfrequencyassignmentshallbelessthan 5 10 8ofthefrequencyassignment 0 05ppm EVDO基站测试 WaveformQualityDefinitionThewaveformqualityismeasuredbydeterminingthenormalizedcorrelatedpowerbetweentheactualwaveformandtheidealwaveform Thistestisperformedwithasinglecarrierandsinglesectoronly MinimumStandardThenormalizedcrosscorrelationcoefficient pilotshallbegreaterthan0 97 excesspower13 0 13dB Thenormalizedcrosscorrelationcoefficient MACshallbegreaterthan0 912 excesspower 0 4dB Thenormalizedcrosscorrelationcoefficient datashallbegreaterthan0 97 excesspower 0 13dB foralldatarates EVDO基站测试 TotalPowerDefinitionWithineachslot thePilot MAC andTrafficorControlChannelsshallbetime divisionmultiplexed Alltime divisionmultiplexedchannelsshallbetransmittedatequalpower Thistestmeasuresthetimeresponseofthemeanoutputpowerfornon idleslotsandthemeanpowerattheRFoutputport MinimumStandard EVDO基