CDMA网优高级培训

第一部分,CDMASystemOptimization,Optimization,NeighborListPilotpollutionCoverageholesSearchwindowsizeAccessfailuresPilotsurprise,CDMASystemParameters,手机和系统之间的主要信令：PSMM:PilotStrengthMeasurementMessage(反向)EHDM:ExtendedHandoffDestinationMessage(前向)HCM:HandoffCompleteMessage(反向)NLUM:NeighborListUpdateMessage(前向)PMRM:PowerMeasurementReportMessage(反向)ITSPM:In-trafficSystemParameterMessage(前向),SettingParameters,Therearetwolevelsatwhichparametersareset:1、Atthecarrier-sectorlevel(local参数)2、AttheCBSClevel(global参数),HandoffParameters,HandoffMode:CBSC：Taddmode、TCompmodeSector:NeighborLists、DAHOIndicator、Tadd、Tdrop、TTdrop、TcompMobileSearchWindows:CBSC:AddIntercept、DropInterceptSector:SrchWinA、SrchWinN、SrchWinR,SrchWinA,ActiveandCandidatesetsearchwindowsizeThissizeismadelargeenoughtoincorporate95%ofexpecteddelayspreadenergySmallwindowsizemayleadtonotdetectingusefulmultipathenergyCommonstartingvalue:28chips1km=4.1PNchips1Km光纤=1.7km(空间)=7PNchips,例：手机在离A站(PN=10)1km和离B站(PN=20)3km的地方同时和两个基站通话,0,10,640,644.1（实际）,32767chips,511PN,1284.1,1280,20,0,511PN,32767chips,1292.3(实际),SrchWinA=28,1270.1,1298.1,手机以最强PN为参考，本例中手机认为644.1就是640,并以此作参考点，认为1284.1就是1280，也以此作为搜索窗的中心点。SrchWinA则取A、B两站中最大的,A站,B站,CellSizeParameters,CBSC:PilotIncSector:1、SifPilotPwr(机顶发射pilot的功率)2、Cellradius(决定PamSz和AchPamWinSz,并决定基站的半径)3、TchAcqWinSz(Thisparameterisusedbythetargetsectortrafficchannelwhenacquiringthemobileonahandoffadd.Itmustbeaslargeas“AchWinSz”),ForwardPowerControl,见图-1,StateDiagramofForwardPowerContral,见图-2,SMAP,SystemMonitoringApplicationProcessor该工具直接从FEP中取得反向信道的消息（FERDistribution;Pareto),CDL部分参数分析,ACCESS_PN_OFFSET(手机和基站的码片偏差)ENTRY_TYPE（呼叫类型：0-主叫；1-被叫）SERVICE_OPTION（服务类别：话音、数据等）NEGOTIATED_SO（最终确定的服务类别）LAST_MM_SETUP_SO（18-23都是属于正常范围，如果有问题，也与基站无关）,第二部分,CallProcessingCallProcessing(Callsetup、SoftHandoff、Powercontrol)SomeParameters,J-STD-8VS.IS95A,J-STD-8:Rateset2(13KCelp编码)有4种速率：14.4k7.2k3.6k1.8kIS95A:Rateset1(8KCelp编码)有4种速率：9.6k4.8k2.4k1.2kJ-STD-8比IS95质量好，但是功率大、容量小8KEVRC(EnhancedVariableRateCodec),MobileStationCallProcessingStates,PowerUpInitializationStateIdleStateSystemAccessstateControlontheTrafficChannel,MobileStationInitializationState,SystemDeterminationSubstatePilotChannelAcquisitionSubstateSyncChannelAcquisitionSubstate（最强导频的同步信息）ThinkingChangeSubstate（长码同步）,MobileStationIdleState,IdleProceduresResponsetoOverheadInformationOperationMSPageMatchOperationMSOrderandMessageProcessingOperationMSOriginationOperationMSMessageTransmissionOperationMSPower-DownOperation,AcknowledgementProceduresforPagingChannelMessage,BSMS（PagingChannel）Ack_REQ:（是否需要确认）MSG_SEG:（消息序号）ADDR_TYPE:（号码类型）MSBS(AccessChannel)VALID_ACK:(是否确认)ACK_SEQ:（对几号消息的确认）ACK_TYPE:（确认类型）,AcknowledgementProceduresforAccessChannelMessages,MSBS(AccessChannel)ACK_REQ:AllAccesschannelmessagerequireacknowledgmentMSG_SEQBSMSVALID_ACKACK_SEQ,PagingChannelMessages,SystemParametersMessageAccessParametersMessageNeighborListMessageCDMAChannelListMessageOrderMessage(系统to手机)ChannelAssignmentMessage(分配WalshCode),PagingChannelMessages(continue),DataBurstMessageAuthenticationChallengeMessageSSDUpdateMessageExtendedSystemParametersMessageGlobalServiceRedirectionMessageNullMessage,SystemParametersMessage,8种登记方式：区域登记(SID、NID、REG_ZONE)开机登记关机登记周期性登记距离登记参数变化登记指令登记隐含登记,SystemParametersMessage(continue),1、REG_ZONE(登记区)1、TOTAL_ZONE（登记表大小）1、ZONE_TIMER（超时删除登记区）1、HOME_REG（归属登记区）2、POWER_UP_REG3、POWER_DOWN_REG4、REG_PRD,SystemParametersMessage(continue),5、BASE_LAT5、BASE_LONG5、REG_DIST6、PARAMETER_REG其它：SRCH_WIN_A、SRCH_WIN_N、SRCH_WIN_RNGHBR_MAX_AGE(PN在Nei中的时间),SystemAccessState,AccessAttemptsNOW_PWR、INIT_PWRPAM_SZ、AchPamWinSz(这两个参数不用设置，而是由小区半径CellRadius决定),AccessAttempts,Power:1、IP=-73-MeanInputPower(dBm)+NOM_PWR+INIT_PWR2、NOM_PWR:Nominaltransmitpowerupoffset(前、反向信道衰耗差的校准值)3、INIT_PWR:Initialpoweroffsetforaccess(开始接入电平补偿)4、PWR_STEP:Powerincrement(PI),AccessAttempts(continue),TimingTA=(2+ACC_TMO)*80ms(基站确认时长)RT:Randomnumberofslotsbetween0and(PROBE_BKOFF+1)(PROBE_BKOFFassumesvaluesof0to15),AccessAttempt,AccessAttempt(continue),MSControlontheTrafficChannelState,业务信道中传控制信令用于功控和切换Blank&Burst(用1帧传信令，8.6K、172bit)话音帧结构：MM：有无被信令抢占（1-有；0-无）TT：主/次要业务（1-短信息；0-信令抢占）TM：11(全部信令),MSControlontheTrafficChannelState(continue),2、Dim:88位信令，80话音)01(1/4:40话音，128信令)10(1/8:16话音，152信令),ForwardTrafficChannelMessages,AuthenticationChallengeMessage(强制鉴权请求)ExtendedHandoffDirectionMessage(切换指示)DataBurstMessage切换完成后，系统给手机发的3条信息：In-TrafficSystemParametersMessageNeighborListUpdateMessagePowerControlParametersMessage,ReverseTrafficChannelMessage,PSMM:PilotStrengthMeasurementMessage(用于切换：满足切换时发送)PMRM:PowerMeasurementReportMessage(用于前向功控：前向信道误帧情况的测量报告)HandoffCompletionMessage,ForwardPowerControl(FPC)Overview,目标：在保证通话质量的前提下，尽量减少干扰FPC由基站根据手机报告的错帧信息（PMRM）来完成前向功控速度较慢，只能克服阴影衰落（慢衰落）,而不能克服多径衰落（快衰落）,ForwardTrafficChannelPowerControlfortheMS,Bothperiodicandthresholdreportingareavailable1、Whenperiodicreportingisenabled(PWR_PERIOD_ENABLE=1)andTOT_FRAMES=(2PWR_REP_FRAMES/2*5)thentheMSShallsendaPMRMtotheBS.Forthecurrentrecommendedvalueof9,theequationyields113framesor2.26seconds.2、Whenthresholdreportingisenabled(PWR_THRESH_ENABLE=1)andBAD_FRAMES=PWR_REP_THRESH(recommended=2),thentheMSshallsendaPMRMtotheBS,ForwardTrafficChannelPowerControlfortheMS(continue),AftersendingaPMRM,theMSshallresetTOT_FRAMESandBAD_FRAMEStozeroandwillnotincrementeithercounterforaperiodofPWR_REP_DELAY(recommended=1)*4frames.WheneverTOT_FRAMES=(2PWR_REP_FRAMES/2*5),theMSwillresetTOT_FRAMESandBAD_FRAMEStozero.,FPCOverview-DigitalGain,在MCC中改变信号增益（基带数字信号）来完成功控。SettingpilotpowerfixesrelationshipofGaintopowerPtch=Ppilot*Gtch2/Gpilot2因为pilot的P和G是不变的，所以靠改变Gtch来改变PtchSync和Paging信道类似,UnderstandingGains&Powers,FeatureReducesInterferenceontheForwardLink,StepDownRate*2,NormalStepDownRate,OrigGain,Nominal,Minimum,OrigDelay,Time,ReversePowerControl(RPC)CloseLoop-Inner&OuterLoops,OtherInfo,FrameQualityInfo,TargetEnergy(EbNo)SetPoint,ActualEnergy(EbNo),ReverseTrafficchannel,ForwardTrafficchannel,PCB800Hz,OUTERLOOP(XC),INNERLOOP(MCC),RPCCloseLoop(continue),内环：IfEbNo(EbNo)TPCB=1降功率外环:If