中级培训第二模块之二参数课件

中级培训第二模块之二参数中级培训第二模块之二参数课程时间08:15 开始12:45 结束15:00 开始17:30 结束约二天时间。课程时间08:15 开始CHANNELCONFIGURATIONS

Contents

TimeSlotsBurst2SignalingChannels1TDMAframe

TCH/F,TACH

SDCCH/8,SDCCH/4,CBCH(2ndphaseGSM)

BCCH/CCCH3TrafficChannels

4Parameters

LogicalChannelsCHANNELCONFIGURATIONS

ContentCHANNELCONFIGURATIONS

TimeSlotsandFrames0122425012495007Hyperframe=2048SuperframesSuperframe=26x51or51x26Multiframes26Multiframe=120ms51Multiframe=235msTDMAframe=4.615msTCHSIGN.CHANNELCONFIGURATIONS

TimeSlCHANNELCONFIGURATIONS

BurstPeriod07TDMAframe=4.615ms=BURSTPERIOD000fsCHANNELCONFIGURATIONS

BurstPCHANNELCONFIGURATIONS

LogicalChannels,Downlink

BSS->MSBCHCCCHFCCHSCHBCCHPCHAGCHDCCHTCHSDCCHSACCHFACCHTCHTCHCOMMONCHANNELSDEDICATEDCHANNELSCHANNELCONFIGURATIONS

LogicalCHANNELCONFIGURATIONS

LogicalChannels,Uplink

MS->BSSCCCHRACHDCCHTCHSDCCHSACCHFACCHTCHTCHCOMMONCHANNELSDEDICATEDCHANNELSCHANNELCONFIGURATIONS

Logical中级培训第二模块之二参数课件中级培训第二模块之二参数课件中级培训第二模块之二参数课件中级培训第二模块之二参数课件中级培训第二模块之二参数课件FCCH频率校正信道：给ＭＳ提供一个标志，使它们在若干ＴＲＸ之间发现包含广播传输的ＴＲＸ，移动台开机后，搜寻这个信号．SCH同步信道:包含基站识别码BSIC和简化的TDMA帧号.BSIC用于识别不同的小区,TDMA帧号用于话间加密.BCCH广播控制信道:包含了详细的网络和小区信息,如:服务区和邻小区的频率.跳频序列,信道组合方式,COMBINE等;寻呼组,通常一个小区有多个寻呼信道,为了防止移动台为了一个寻呼消息而侦听所有的寻呼信道,寻呼信道以只有某一组移动台侦听某一特定的寻呼信道的方式分开;邻小区信息,MS必须知道目前小区的邻区是什么,以及它们广播频率.PCH寻呼信道:下行,寻呼用户时用,它是由位置区的所有BTS广播的.RACH随机接入信道:CCCH中唯一的上行链路.用于MS启动一事务,主叫,或作为PCH的应答.AGCH准许接入信道;为MS指派一个SDCCH,是下行的.SDCCH独立专用控制信道,用于呼叫建立,鉴权,位置更新,TCH分配,短消息.SACCH慢随路控制信道:SACCH伴随着SDCCH和TCH,用于发送测量报告,功率控制,时间校准,MS通话时发送短信.FACCH快随路控制信道:用于切换时,它与一个TCH对应,代替20MS的话间,工作于偷帧模式.TCH业务信道:传送话音与数据,TCHF是全速13.3Kbit/s,TCHH是半速率5.6,EFR增加型全速率,13.3,但编码方式与全速率不同,在话音质量上有更一步提高.FCCH频率校正信道：给ＭＳ提供一个标志，使它们在若干ＴＲＸCHANNELCONFIGURATIONSConfigurationofSignallingChannels07SeparatedConfigurationCombinedConfiguration07ts0=bcch/pch/agchts1=sdcch/8ts0=bcch/sdcch/4/pch/agchCHANNELCONFIGURATIONS07SeparaCHANNELCONFIGURATIONS

CombinedCCCH/SDCCH/4MultiframefsbbbbcfcfcsccccccccfcfsttttttttffttttttttfsfsssssssssttttrrsfssssssrrrrrrrsfrrrrrrrrrrfrrrrtrtttrftttrtrtttDownlinkUplinkCHANNELSf=FCCHb=BCCHr=RACH i=idles=SCH/SACCHc=CCCHt=SDCCH/451TDMAframes=235mst0501.2.3.4.iCHANNELCONFIGURATIONS

CombinfsbbbbcfcfcsccccccccfcfsccccccccffccccccccfsfccccccccsrrrrrrrfrrrrrrrrrrrrrrfrrrrrrrrrrfrrrrrrrrrrfrrrrrrrrrDownlinkUplinkCHANNELSf=FCCHb=BCCH r=RACH i=idles=SCHc=CCCH=PCH/AGCH51TDMAframes=235msr050CHANNELCONFIGURATIONS

BCCH/CCCHMultiframeifsbbbbcfcfcsccccccccfcfsccccccCHANNELCONFIGURATIONS

SDCCH/8MultiframetttttttfttttttttttttttfttttttttttfsssssssssfsssssssssssssfssssttttttsfttttttttttfttttttttttftttttttttDownlinkUplinkCHANNELSt=SDCCH/8s=SACCH/8 i=idlett51TDMAframes=235mss1.2.3.5.6.7.8.4.050iiiiiiCHANNELCONFIGURATIONS

SDCCH/CHANNELCONFIGURATION

NumberofBlocksforAGCHonlyfsbbbbcfcfcsccccccccfcfsccccccccffccccccccfsfccccccccsBCCH/CCCHCHANNELSf=FCCHb=BCCH t=SDCCH/4 i=idles=SCH/SACCHc=CCCH=PCH/AGCH 51TDMAframes=235msfsbbbbcfcfcsccccccccfcfsttttttttffttttttttfsfsssssssss123456789123BCCH/SDCCH/4iiCHANNELCONFIGURATION

NumberCHANNELCONFIGURATIONS

FullRateTrafficChannel(TCH)MultiframetttttttftttttttttttftttttDownlinkandUplinkCHANNELSt=TCHs=SACCH i=idlets26TDMAframes=120ms025iCHANNELCONFIGURATIONS

FullRCHANNELCONFIGURATIONS

HalfRateTrafficChannel(TCH)MultiframeDownlinkandUplinkCHANNELSt=TCHs=SACCH i=idle26TDMAframes=120ms025DownlinkandUplinkCHANNELSt=TCHs=SACCH i=idle26TDMAframes=120ms025ttttttttttttttttttttttttttttttttttttttttttttttttstitCHANNELCONFIGURATIONS

HalfRCHANNELCONFIGURATIONS

SDCCHCapacity

Locationupdates

ShortMessageServiceimsiattached/detached

CallsetupSDCCHusedinCHANNELCONFIGURATIONS

SDCCHCCHANNELCONFIGURATIONS

SDCCHCapacity(a)Example(CallestablishmentandLocationUpdateincluded)CallEstablishment2TRXs/Cell~8,11Erl/Cell(1%Blockingprobability)1,5min/Subs/BH=25mErl./Subs8,11Erl/Cell/25mErl./Subs=325Subs/CellAuthenticationandCiphering=7sec=1,94mErl/Call(SDCCHreservationtime) =>325Calls/Cell*1,94mErl/Call=0,6305Erl/Cell(SDCCH)LocationUpdateLocationUpdatesoncein60minutes(parametertimerPeriodicUpdateMS)325Subs/CellSDCCHreservationtimeforLocationUpdate=7sec=1,94mErl=>325Calls/Cell*1,94mErl/Call=0,6305Erl/Cell(SDCCH)CallEstablishmentandLocationUpdatetogether0,632Erl+0,632Erl=1,261Erl/CellWith1%BlockingProbability(ErlangBtable)=>5SDCCH/CellCombinedBCCH/SDCCHchannelstructureisnotpossibleinthiscase!SeparateConfiguration(1BCCH/CCCHand1SDCCH/8)isneeded!CHANNELCONFIGURATIONS

SDCCHCCHANNELCONFIGURATIONS

ErlangBTableCHANNELCONFIGURATIONS

ErlangCHANNELCONFIGURATIONS

SDCCHCapacity(b)Example(CallestablishmentandLocationUpdateincluded)CallEstablishment2TRXs/Cell~8,11Erl/Cell(1%Blockingprobability)1,5min/Subs/BH=25mErl./Subs8,11Erl/Cell/25mErl./Subs=325Subs/CellAuthenticationandCiphering=7sec=1,94mErl/Call(SDCCHreservationtime) =>325Calls/Cell*1,94mErl/Call=0,6305Erl/Cell(SDCCH)LocationUpdateLocationUpdatesoncein120minutes(parametertimerPeriodicUpdateMS)325Subs/CellSDCCHreservationtimeforLocationUpdate=7sec=1,94mErl=>325Calls/Cell*1,94mErl/Call*1/2=0,31525Erl/Cell(SDCCH)CallEstablishmentandLocationUpdatetogether0,6305Erl/Cell+0,31525Erl/Cell=0,94575Erl/Cell(SDCCH)With1%BlockingProbability(ErlangBtable)=>~4SDCCH/CellCombinedBCCH/SDCCHchannelstructureispossibleinthiscase!CHANNELCONFIGURATIONS

SDCCHCCHANNELCONFIGURATIONS

SDCCHCapacity(c)Example(CallestablishmentandLocationUpdateincluded)CallEstablishment2TRXs/Cell~8,11Erl/Cell(1%Blockingprobability)1,5min/Subs/BH=25mErl./Subs8,11Erl/Cell/25mErl./Subs=325Subs/CellAuthenticationandCiphering=7sec=1,94mErl/Call(SDCCHreservationtime) =>325Calls/Cell*1,94mErl/Call=0,6305Erl/Cell(SDCCH)LocationUpdateLocationUpdatesoncein120minutes(parametertimerPeriodicUpdateMS)325Subs/CellSDCCHreservationtimeforLocationUpdate=7sec=1,94mErl=>325Calls/Cell*1,94mErl/Call*1/2=0,31525Erl/Cell(SDCCH)SMSSMStrafficestimation1.0mErl/subscriber=>325Calls/Cell*1mErl/Call=0,325Erl/Cell(SDCCH)CallEstablishment,LocationUpdateandSMStogether0,6305Erl/Cell+0,31525Erl/Cell+0,325Erl/Call=1,27075Erl/Cell(SDCCH)With1%BlockingProbability(ErlangBtable)=>~5SDCCH/CellSeparatedchannelstructureispossibleinthiscaseCHANNELCONFIGURATIONS

SDCCHCCHANNELCONFIGURATIONS

PagingCapacityExampleCombinedBCCH/SDCCHConfigurationOneBlockReservedforAGCH=>2BlocksforPCHPagedMobileStationsperPaging_RequestMessage:From2to4,inAverage3InAverage2PagesperMobileStation3Pages/Blocks*2Blocks=6Pagesevery51-framesMultiframe(235ms.)2Pages/PagedMS=>3PagedMSevery235ms.((3600*1000)/235)*3=45，957PagedMSperHour.WorstCaseAllTransactionsareMobileTerminatingAllCellsinLocationAreagetthesamePCHLoadCapacityWithoneTRX2,95Erl.25mErl./subs.=>120subscribersBTS

MSPaging_RequestBTS3MS2Paging_RequestCapacityofPCHcalculatedforaLocationAreaCHANNELCONFIGURATIONS

PagingCHANNELCONFIGURATION

NumberOfBlocksforAccessGrantfsbbbbcfcfcsccccccccfcfsccccccccffccccccccfsfccccccccsBCCH/CCCHCHANNELSf=FCCHb=BCCHt=SDCCH/4s=SCH/SACCHc=CCCH=PCH/AGCH51TDMAframes=235msfsbbbbcfcfcsccccccccfcfsttttttttffttttttttfsfsssssssss123456789123BCCH/SDCCH/4CHANNELCONFIGURATION

NumberOCHANNELCONFIGURATIONS

CCCHImprovements(1)numberOfBlocksForAccessGrant=0,settingPagesusedtohavealwayspriorityinCCCHblocksnomatterwhatnumberOfBlocksForAccessGrantsettingwas.Now,IfnumberOfBlocksForAccessGrant=0thenAGCHmessageswouldhavepriorityoverPCHmessages.IfnumberOfBlocksForAccessGrant<>0thenPCHmessageswouldhavepriorityoverAGCHmessages.

ThuscapacitycanbedynamicallysharedbetweenPCHandAGCH=>betterthroughputforPCHespeciallyforcombined-BCCHCHANNELCONFIGURATIONS

CCCHICHANNELCONFIGURATIONS

NumberofMultiframesBetweenPaging#of51TDMAframemultiframes(2..9)betweentransmissionsofPaging_Requestmessagestomobilesofthesamepaginggroup.#ofpaginggroups=numberOfBlocksForAccessGrant*noOMultiframesBetweenPaging=====>Page/groupevery2...9*235ms=0.47...2.115sMobileStationcalculatesitsPagingGroupbasedonIMSIandontheNumberofPagingGroups.CHANNELCONFIGURATIONS

NumberCHANNELCONFIGURATIONS

NumberofMultiframesBetweenPagingAffectsofthe#ofthePagingGroupsBatteryConsumptionoftheMobileStation手机省电SpeedofCallSetups呼叫速度根据CCCH、AG和MFR的定义，可以计算出每个小区寻呼子信道的个数：当CCCH与SDCCH共用一个物理信道时：（3－AG）×MFR。当CCCH不与SDCCH共用物理信道时：（9－AG）×MFR。当参数MFR越大，小区的寻呼子信道数也越多，相应属于每个寻呼子信道的用户数越少（参见GSM规范05.02寻呼组计算方式），因此寻呼信道的承载能力加强,上述优点的获得是以牺牲寻呼消息在无线信道上的平均时延为代价的，即MFR越大使寻呼消息在空间段的时间延迟增大，系统的平均服务性能降低。CHANNELCONFIGURATIONS

Number设置MFR时建议参考下列原则：MFR的选择以保证寻呼信道不发生过载为原则，在此前提下应使该参数尽可能小。一般建议：对寻呼信道负载很大的地区（通常指话务量很大的区域），MFR设置为8或9（即以8个或9个复帧作为寻呼组的循环）；对寻呼信道负载一般的地区（通常指话务量适中的区域），MFR设置为6或7（即以6个或7个复帧作为寻呼组的循环）；对寻呼信道负载较小的地区（通常指话务量较小的区域），MFR设置为4或5（即以4个或5个复帧作为寻呼组的循环）。在运行的网络中应定期测量寻呼信道的过载情况，并以此为根据适当调整MFR的数值。设置MFR时建议参考下列原则：CHANNELCONFIGURATIONS

RACHControllingRET:Numberofretransmission=

maxNumberRetransmission(1,2,4,7)当ＢＴＳ对信道请求无响应时，允许手机重发请求的最大次数．

SLO:window=numberOfSlotsSpreadTrans(3...12,14,16,20,25,32,50)001RACH(Re)transmissionduringthewindow=>TotaltimeforRACH=maxNumberRetransmission*numberOfSLotsSpreadTrans+...TDMA-framesCHANNELCONFIGURATIONS

RACHCo三个参数，即：发送分布时隙数SLO、最大重发次数RET和与参数SLO及信道组合有关的参数S。三个参数，即：发送分布时隙数SLO、最大重发次数RET和与参参数SLO越大，移动台发送信道请求消息之间的间隔的变化范围越大，RACH冲突的次数相应减少。参数S越大，移动台发送信道请求消息之间的间隔越大，RACH信道上的冲突减少，然而，参数SLO和S的增大却会延长移动台的接入时间，从而导致整个网络的接入性能下降，因此必须选择合适的SLO和S。参数SLO越大，移动台发送信道请求消息之间的间隔的变化范围越中级培训第二模块之二参数课件CHANNELCONFIGURATIONS

ParametersRelatedtoSignalling

noOfMultiframesBetweenPaging2...9

numberOfBlocksForAccessGrant0...7(ifBCCH/CCCHused)0...2(ifcombinedBCCH/SDCCHused)

maxNumberRetransmission1,2,4,7(RACHcontrol)

numberOfSlotsSpreadTrans3...12,14,16,20,25,32,50(RACHcontrol)ParametersValueCHANNELCONFIGURATIONS

ParametIDLEMODE什么是ＩＤＬＥＭＯＤＥ１手机开机２没有专用连接会选择一个最适合的小区接入以收听下行上的系统信息，需要时可发起呼叫，当被叫时可被网络定位．ＩＤＬＥＭＯＤＥ的三个任务：１选网２小区选择和小区重选３位置更新IDLEMODE什么是ＩＤＬＥＭＯＤＥlocationAreaId

ncc(NetworkColourCode) 0…7bcc(BTSColourCode) 0…7bsIdentityCodecell-ID 0…65535ParameterValuetrainingSequenceCode 0…7IDLEMODEOPERATION

ID'sandIDCodes

mcc(MobileCountryCode) 0…999mnc(MobileNetworkCode) 0…99lac(LocationAreaCode) 0…65535CellGlobalIdentity MCC+MNC+LAC+CIlocationAreaIdncc(NetworkCoIDLEMODEOPERATIONBaseStationIdentityCode(BSIC)

BSICisacombinationofNCCandBCC

ReportedinMeasurementResultstoBSC

CanbelistedinHexorDecimalIDLEMODEOPERATIONBSICisaIDLEMODEOPERATION

BaseStationColourCodeMNC=OperatorMCC=Countrye.gFinlandLAC1=HelsinkiLAC2LAC3LAC4f1f2f3f1f1bcc=1bcc=2bcc=3Neighbourlistoff3:f1f2...LocationAreaCodeBSCBTSBTSBTS12nIDLEMODEOPERATION

BaseStati

initialFrequency1...124GSM900 512…885GSM1800 512…810 GSM1900ParameterValuebCCHAllocation-ID1...128inGSM（S11.5：660）bCCHAllocationList1...124(FREQ)inGSM(max.32freq.forallbands)idleStateBCCHAllocation(IDLE)0(BCCHlististakenfromtheadjacentcell)1...128(numberoftheBCCHlistused)measurementBCCHAllocation(ACT) ADJ(BCCHfrequencylisttakenfromadj.cell) IDLE(activeMSusesthesamelistasMSinIDLEmode)IDLEMODEOPERATION

FrequenciesinitialFrequency

plmnpermitted（PLMN）0...7Parameter

ValueIDLEMODEOPERATION

PLMNSelectionTwoModesAutomaticManual该参数的设置不当可能是引起掉话的主要原因之一。plmnpermitted（PLMN）IDLEMODEOPERATION

CellSelectioninIdleModeTwomethods:a)Normalcellselectionb)Storedlistcellselection(opt)Ifnosuitablecellfoundwithwithmethodb)thena)istried.b)搜寻上次关机时,手机中存的那个频点,如果没有进行a)所有频点全听,找一个最好的.IDLEMODEOPERATION

CellSelIDLEMODEOPERATION

Suitablecelltocampon

CellisintheselectedPLMNCellisnotbarredItisnotinaforbiddenlocationareafornationalroaming

位置区是允许的ＬＡＣC1>0IDLEMODEOPERATION

SuitableIDLEMODEOPERATION

CellBarredExistingLayerBarred,NoNewMicrocellLayerBarred,YesCallsetuponmacro,

GPS-satellite

MeasurementSystemcellBarQualifyYcellbarcanbeoverridden不考虑CELLBAR(C2)Ncellbarcannotbeoverridden要听CELLBARExampleIDLEMODEOPERATION

CellBarr中级培训第二模块之二参数课件Averaging3-5s.Decision5s.IDLEMODEOPERATION

CellSelectioninIdleMode-ImplementationRadioCriteria C1=(A-Max(B,0))A=ReceivedLevelAverage-p1B=p2-MaximumRFOutputPoweroftheMobileStationp1=rxLevelAccessMin Min.receivedlevelattheMSrequiredforaccesstothesystemp2=msTxPowerMaxCCH Max.TxpowerlevelanMSmayusewhenaccessingthesystemrxLevelAccessMin（RXP） -110...-47msTxPowerMaxCCH 5…43Parameter

ValueAveraging3-5s.IDLEMODEOPER中级培训第二模块之二参数课件IDLEMODEOPERATION

CellRe-selectioninIdleModeCellre-selectionisneededifPathLosscriterionC1<0forcellcampedon,formorethan5seconds.连续5S,C1<0ThereisDLsignallingfailure下行信令失败Thecellcampedonhasbecomebarred.小区BARREDThereisabettercellintermsofC2criterion发现更好的小区Arandomaccessattemptisstillunsuccessfulafter"maxNumberRetransmission"repetitions.RACH失败次数>最大重传次数MSwillcalculatetheC1andC2fortheservingcell,every5sMSwillcalculatetheC1andC2fortheneighbourcells,every5sIDLEMODEOPERATION

CellRe-cellReselectParamInd(PI)YC2reselectionparametersarebroadcastNC2reselectionparametersarenotbroadcastcellReselectOffset（REO）0...126(dB) 2dBsteppenaltyTime（PET）20...640(s) 20ssteptemporaryOffset（TEO）0...70(dB) 10dBstep(thevalueisnegative)Parameter

Value

C1+cellReselectOffset-temporaryOffset*H(penaltyTime-T)

<=penaltyTime<640

C2= C1-cellReselectOffset……………… penaltyTime=640

1whenT<=penaltyTime H(x)= 0whenT>penaltyTimeIDLEMODEOPERATION

CellRe-selectionwithC2,continuescellReselectParamInd(PI)中级培训第二模块之二参数课件中级培训第二模块之二参数课件中级培训第二模块之二参数课件中级培训第二模块之二参数课件IDLEMODEOPERATION

CellRe-selection

cellReselectHysteresis(0…14dB)(mentionedinRRManagementinIDLEmodeControl).2dBstepA=4dBB=6dBC=8dB

ABC

1212MSMovingABCLA1LA2IDLEMODEOPERATION

CellRe-sIDLEMODEOPERATION

CellRe-selectioncellReselectHysteresis(0…14dB)cellReselectHysteresisThenominalLAborderTherealLAborderL1L2IDLEMODEOPERATION

CellRe-s中级培训第二模块之二参数课件中级培训第二模块之二参数课件中级培训第二模块之二参数课件timerPeriodicUpdateMS 0.0...25.5(hours)allowIMSIAttachDetach Yes/NoParameter

ValueIDLEMODEOPERATION

LocationUpdateMS=>MSC/VLRMobileStationswitchedONNoIMSIAttach/DetachSameLocationArea=>NoLocationUpdateDifferentLocationArea=>LocationUpdateChangeoftheLocationAreaLocationAreaunderthesameMSC/VLRLocationAreaunderanotherMSC/VLR=>HLRwillbeupdatedServiceisrejected(MSunknowninVLR)TimePeriodic(MS->MSC/VLR)timerPeriodicUpdateMS GSM系统中发生位置更新的原因主要有两类，一种是移动台发现其所在的位置区发生变化（LAC不同）；另一种是网络规定移动台周期地进行位置更新。周期位置更新的频度是由网络控制的，周期长度由参数PER确定。PER的取值范围为6分钟～25小时30分，以6分钟为步长。PER设置为0表示小区中不用周期的位置更新。周期位置更新是网络与移动用户保持紧密联系的一种重要手段，因此周期时间越短，网络的总体服务性能越好。但频繁的周期更新有两个负作用：一是网络的信令流量大大增加，对无线资源的利用率降低，在严重时会直接影响系统中各个实体的处理能力（包括MSC、BSC和BTS）；另一方面则使移动台的功耗增大，使系统中移动台的平均待机时间大大缩短。因此PER的设置需权衡网络各方面的资源利用情况而定。GSM系统中发生位置更新的原因主要有两类，一种是移动台发现其IMSI分离过程是指移动台向网络通告它正从工作状态进入非工作状态（通常指关机过程），或SIM卡已从移动台中取出的过程。网络在收到移动台的通告后将指示该IMSI用户处于非工作状态，因此以该用户作为被叫的接续请求将被拒绝。与分离过程相应的是IMSI结合过程，它是指移动台向网络通告它已进入工作状态（通常指开机过程），或SIM卡再次被插入移动台。移动台重新进入工作状态后将检测当前所在位置区（LAI）是否和最后记录在移动台中的LAI相同，若相同则移动台启动IMSI结合过程，否则移动台启动位置更新过程（代替IMSI结合过程）。网络接收到位置更新或IMSI结合过程后，将指示该IMSI用户正处于工作状态。参数ATT用于通知移动台，在本小区内是否允许进行IMSI结合和分离过程。ATT的取值有2种，即是或否（YES/NO）。NO表示不允许移动台启动IMSI结合和分离过程；YES则表示移动台必须启用结合和分离过程。ATT标志通常应设置为YES，以便在移动台关机后网络不再处理以该用户为被叫的接续过程，这样不仅节约了网络各个实体的处理时间，还可以大大节约网络的许多资源（如寻呼信道等）。ATT的设置必须注意：在同一位置区的不同小区其ATT设置必须相同。因为，移动台在ATT为YES的小区中关机时启动IMSI分离过程，网络将记录该用户处于非工作状态并拒绝所有以该用户为被叫的接续请求。若移动台再次开机时处于它关机时的同一位置区（因此不启动位置更新过程）但不同的小区，而该小区ATT设置为NO，因此移动台也不启动IMSI结合过程。在这种情况下，该用户将无法正常成为被叫直到它启动位置更新过程。IMSI分离过程是指移动台向网络通告它正从工作状态进入非工作HANDOVERPROCESS

WhatisthepurposeofHO? Callcontinuity Callquality Others...容量….HANDOVERPROCESS

WhatistheHANDOVERPROCESS

CausesTimingAdvanceAdjacentCellsDownlinkQualityUplinkQualityAV_RXQUAL_UL_HOAV_RXQUAL_DL_HODownlinkLevelUplinkLevelAV_RXLEV_UL_HOAV_RXLEV_DL_HOAV_RANGE_HOAV_RXLEV_NCELL(n)QUALITY&INTERFERENCELEVELDISTANCEPERIODICCHECKS周期性UMBRELLAPOWERBUDGETIMPERATIVEHO强制CHANNELADMINISTRATIONDIRECTEDRETRYTHRESHOLDCOMPARISON比较门限RAPIDFIELDDROPOthers:IntelligentUnderlayOverlayTrafficReason……….MSSPEEDMSSpeedAV_MS_SPEEDHANDOVERPROCESS

CausesTimingHANDOVERPROCESS

HandoverDecision

Handoverprocessmaybetriggeredby

比较门限Quality,fieldstrengthordistancevalues

fallbelow/exceedtheirthreshold

周期性检查

Periodicchecks

PowerbudgetHO

UmbrellaHOHANDOVERPROCESS

HandoverDeciHANDOVERPROCESS

HandoverPriority

Handoverpriority1.UplinkanddownlinkInterference干扰2.Uplinkquality上行质量3.Downlinkquality下行质量4.Uplinklevel上行电平5.Downlinklevel下行电平6.Distance距离7.RapidFieldDrop快衰落8.SlowmovingMS慢速移动9.Bettercelli.e.Periodiccheck(PowerBudgetHOorUmbrellaHO)周期性检查10.PC:Lowerquality/levelthresholds(UL/DL)上下行质量功控11.PC:Upperquality/levelthresholds(UL/DL)上下行电平功控HANDOVERPROCESS

HandoverPrioHANDOVERPROCESS

HandoverAlgorithmsAV_RXLEV_NCELL(n)>hoLevelUmbrella(n)PBGT>hoMarginPBGT(n)wherePBGT=((msTxPwrMax-msTxPwrMax(n))-(AV_RXLEV_DL_HO-AV_RXLEV_NCELL(n))-(btsTxPwrMax-BTS_TXPWR))AV_RXLEV_NCELL(n)>rxLevMinCell(n)+Max(0,A)A=msTxPwrMax(n)-PP=dependingonMSClassmark

PBGT>hoMarginLev/Qual(n)wherePBGT=(AV_RXLEV_NCELL(n)-AV_RXLEV_DL_HO)-(btsTxPwrMax-BTS_TXPWR)

1.2.1’.InallHandovercases(inimperativeHOonlyrequirement)ExceptforUmbrellaHandover2’.TheadditionalconditionIfenableHoMarginLevQual=YHANDOVERPROCESS

HandoverAlgoPBGT=((msTxPwrMax-msTxPwrMax(n))-(AV_RXLEV_DL_HO-AV_RXLEV_NCELL(n))

-(btsTxPwrMax-BTS_TXPWR)PBGT=((33dBm-33dBm)-(-90--80)-(42dBm-42dBm)=10dB

10dB>6dB OK!!!!AV_RXLEV_NCELL(n)>rxLevMinCell(n)+Max(0,msTxPwrMax(n)-msTxPwrMax)-80dBm>-99dBm+(33dBm-33dBm)=-99dBm1.2.AV_RXLEV_DL_HO=-90dBmmsTxPwrMax=33dBm(=2W)btsTxPwrMax=42dBm(=16W)BTS_TX_PWR=42dBm=(16W)hoMarginPBGT(n)=6dBServingCell:BestAdjacentCell:AV_RXLEV_NCELL(n)=-80dBmrxLevMinCell(n)=-99dBmmsTxPwrMax(n)=33dBm(=2W)btsTxPwrMax(n)

=42dBm(=16W)HANDOVERPROCESS

PowerBudgetHandover(1)PBGT=((msTxPwrMax-msTxPwrMaHANDOVERPROCESS

PowerBudgetHandover(2)TriggerPeriodicCheck(hoPeriodPBGT)Typicallyusedbetweencellsofthesame"Layer"hoPeriodPBGT(HPP) 1...63(SACCHPeriod)enablePwrBudgetHandover(EPB) Y/NParameter

ValuerxLevMinCell(n)(SL) -110…-47dBm msTxPwrMax(n)(PMAX1) 5…43dBmhoMarginPBGT(n)(PMRG) -24…24dBHANDOVERPROCESS

PowerBudget参数－PRI、OF、BLTPRI、OF、BLT：定义了切换时候选小区的动态优先级，当一个小区拥塞时，可以调整其对比较空闲的相邻小区的优先级，使其容易切出，也可以调整相邻小区对之切换优先级，使其不容易切入，从而减少了本小区的拥塞。

PRI：切换优先级，其取值范围为0—7，7为最高，为了缓解拥塞，可以适当提高PRI值，不过，要切入的邻区属于业务量比较小的基站，也可以降低它作为邻区的切换优先级.

OF：优先级PRI降低的因子，可以根据需要设置。

BLT：BTS的负荷门限，即当切换的目标小区的资源利用率小于或等于BLT时，其切换优先级不变；当切换的目标小区的资源利用率大于BLT时，其切换优先级PRI降低OF级。BLT的设置要配合小区载频数和拥塞程度来优化，当配置较小或拥塞较大时，可以适当小一点，配置较大或拥塞较小时，可以适当大一点。参数－PRI、OF、BLTPRI、OF、BLT：定HANDOVERPROCESS

TargetCellSelection(2)

Allcellshaveequalpriority

cell a b cRx_Level -75 -80 -831.Load overl. overl. n.overl.hoLoadFactor 1 1 12.Priority 3 3 3NewPriority 2 2 33.Rx_Level -75 -80 =>celllist c,a,b

Onecellhashigherprioritybecauseofsomereason

cell a b cRx_Level -75 -80 -831.Load n./overl. n.overl. n.overl.hoLoadFactor 2 1 12.Priority 4 3 3NewPriority 4/2 3 33.Rx_Level -75 -80/-80 -83=>celllista,b,c(ifcellaisnotoverload)=>celllistb,c,aHANDOVERPROCESS

TargetCellSHANDOVERPROCESS

HandoverduetoLevel(1/2)TriggerThresholdComparison(hoThresholdsLevUL/DL(px-nx))CandidateSelectionEquation1usedEquation2usedifenableHoMarginLevQual=NEquation2'withhoMarginLevusedifenableHoMarginLevQual=YPriorityandLoadConsideredhoThresholdLevUL/DL(LDR/LUR) -110…-47 px(LDP/LUP) 1…32 nx(LDN/LUN) 1…32Parameter

ValuerxLevMinCell(n)(SL) -110…-47dBm msTxPwrMax(n)(PMAX1) 5…43dBmhoMarginLev(n)(LMRG) -24…24dBHANDOVERPROCESS

HandoverdueHANDOVERPROCESS

HandoverduetoLevel(2/2)Equations1and2’areusedifparameterenableHoMarginLevQualisset“Yes”2dBhoMarginLev=4dBTriggerforHandoverduetoLevelAB=>CellBisnotselectedascandidateforHOduetolevelsince2dB<4dBThreshold(Lev)-95dBmHANDOVERPROCESS

HandoverdueHANDOVERPROCESS

HandoverduetoQuality(1/2)TriggerThresholdComparison(hoThresholdsQualUL/DL(px-nx))hoThresholdQualUL/DL(QUR/QDR) 0…7 px(QUP/QDP) 1…32 nx(QUN/QDN) 1…32Parameter

ValuerxLevMinCell(n) -110…-47dBm msTxPwrMax(n) 5…43dBmhoMarginQual(n)(QMRG) -24…24dBHANDOVERPROCESS

HandoverdueHANDOVERPROCESS

HandoverduetoQuality(2/2)ifparameterenableHoMarginLevQualisset“Yes”2dBhoMarginQual=0dBTriggerforHandoverHOduetoQualityAB=>CellBisselectedaspotentialcandidateforHOduetoQualitysince2dB>0dBThreshold(Lev)-95dBmHANDOVERPROCESS

HandoverdueHANDOVERPROCESS

HandoverduetoInterference(1/2)Trigger:ThresholdComparisonThresholdComparisonforQuality(hoThresholdsQualUL/DL(px-nx))ThresholdComparisonforLevel(hoThresholdsInterferenceUL/DL(px-nx))CandidateSelectionPriorityInterCell/IntracellselectedatBSCindependentlyUL/DLPriorityInterQualityHOifAnyTargetOtherwiseIntraCellHOenableIntraHoInterfUL/DL(EIC/EIH) Y/NhoThresholdInterferenceUL/DL(IUR/IDR) -110…-47 px 1…32 nx 1…32Parameter

ValuehoPreferenceOrderInterfUL/DL(HDL/HUL) INTER/INTRA BSCPriorityIntraIntraCellHOHANDOVERPROCESS

HandoverdueHANDOVERPROCESS

HandoverduetoInterference(2/2)Equations1and2’areusedifparameterenableHandoverMarginQualisset“Yes”hoThresholdQual=4hoThresholdInterferenceDL=-85dBmhoPreferenceOrderInterfDL=intraTriggerforHandoverduetoInterferenceAB-Fieldstrengthhigherthanthreshold-Badquality=>interference=>intracellhandover!!Threshold(InterferenceLev)-85dBm50HANDOVERPROCESS

Handoverdue6dBUmbrellaHandoverAB-90dBmHandoverduetoLevelMacrocellMicrocellExampleGSMMSclass4(33dBm)gsmMacrocellThreshold=35dBmgsmMicrocellThreshold=33dBmmsTxPwrMax(n)=33dBmhoLevUmbrella=-85dBmhoThresholdLevDL=-90dBm-85dBmUmbrellaHandoverHandoverduetoLevelHANDOVERPROCESS

UmbrellaHandover(1/2)TriggerPeriodicCheck(hoPeriodUmbrella)Multi-LayeredNetwork6dBUmbrellaAB-90dBmHandoverHANDOVERPROCESS

UmbrellaHandover(2/2)enableUmbrellaHandover(EUM) Y/NhoPeriodUmbrella (HPU) 0…63(SACCH)hoLevelUmbrella (AUCL) -110…-47Parameter

ValueHANDOVERPROCESS

UmbrellaHandHANDOVERPROCESS

CombinedUmbrella&PowerBudgetWhenenablePowerBudgetHo=Yes&

enableUmbrellaHo=YesPowerBudgetHand