CDMA优化-切换和功控与信令

1CDMA系统切换，功控培训讲义2软切换(MAHO)和硬切换对比•Softhandoffcanbeperformedinthesamecarrierlayer•Highqualityhandoffthrough“makebeforebreak”process•DifferentalgorithmmaybeusedtominimizeSHOregiontoreducesystemresourcesconsumption.GSMHardHandoffDistanceCellACellBSoftHandoffSignalStrengthABCDMASoftHandoffBreakbeforeMakeMakebeforeBreak3导频集•导频集：导频集是指所有具有相同的频率但PN码相位不同的导频的集合。导频集分为以下四类激活集：当前手机正在保持连接的业务信道所对应的导频的集合。候选集：导频信号强度足够，手机可以成功解调，随时可以接入。相邻集：当前不在激活集或候选集里，但可能会进入候选集的导频的集合。剩余集：所有其余导频的集合。•BSC与MS间导频集的异同：手机的导频集按照协议划分为激活集、候选集、相邻集、剩余集。BSC中的导频集可以只有激活集和相邻集。4July,19987-46RF100(c)1998ScottBaxter导频搜索顺序Thesearchercheckspilotsinnestedloops,muchlikemeshedgears.Activesandcandidatesoccupythefastest-spinningwheel.Neighborsarenext,advancingonepilotforeachAct+Cand.revolution.Remainingisslowest,advancingonepiloteachtimetheNeighborsrevolve.CURRENTPILOTSETCONTENTSAAACNNNNNNNNNNNNRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR3112112PILOTSEARCHERVIEWEDINSEQUENCE:TypicalElapsedTime=4secondsAAACNRAAACAAACAAACAAACAAACAAACNNNNNNAAACNAAACAAACAAACAAACAAACAAACNNNNNAAACNAAACAAACAAACAAACAAACAAACNNNNNNNAAACAAACAAACNNNRAAACNAAACAAACAAANNCAAACAAACNNNRAAACNAAACAAACAAANNCAAANCAAACNNOnly3of112remainingsetpilotshavebeencheckedthusfar!ANRRRRRRRNNNNNNNNAA5导频集之间的相互转换T_ADDT_DROPPilot1导频强度Pilot2T_TDROPT_TDROP相邻集候选集激活集候选集相邻集TIME1234567867891011121314命令格式jilin_omc-005417dispcbsc-7021hoconstrusersHOCONSTR|HOCONSTRUSER(cbsc#-hoconstr#)|-----------------|--------------------7021-1ICTRKGRP-7021-17021-1ICTRKGRP-7021-137021-1CARRIER-271-1-2837021-1CARRIER-271-2-2837021-1CARRIER-917-1-2837021-1CARRIER-227-1-2837021-1CARRIER-227-2-2837021-1CARRIER-227-3-2837021-1CARRIER-918-1-2837021-2none7021-3none7021-4none7021-5none7021-6none7021-7none7021-14none7021-15none7021-16nonejilin_omc-005417dispcbsc-7021detection|MAXACTIVE-|MAXCEPER-|MAXBTS-|MAXBTS-|MAXBTS-|TCOMPENA-|XCTCOMP|AGG-|AGG-|AGG-|NUM-|HOCONSTR|SETSIZE|CALL|LEGS1|LEGS2|LEGS3|THRSH||STRENGTH1|STRENGTH2|STRENGTH3|CANDIDATE|R(cbsc#-hoconstr#)||||||(dB)|(dB)|(dB)|(dB)|(dB)||-----------------|-----------|---------|-------|-------|-------|---------|-------|---------|---------|---------|---------|---------7021-163322-14.54.5-3.0-7.0-9.0107021-263322-14.54.5-3.0-5.0-7.0107021-363322-14.54.5-3.0-5.0-7.0107021-463322-14.54.5-3.0-5.0-7.0107021-563322-14.54.5-3.0-5.0-7.0107021-663322-14.54.5-3.0-5.0-7.0107021-763322-14.54.5-3.0-5.0-7.0107021-863322-14.54.5-3.0-5.0-7.0107021-963322-14.54.5-3.0-5.0-7.0107021-1063322-14.54.5-3.0-5.0-7.0107021-1163322-14.54.5-3.0-5.0-7.0107021-1263322-14.54.5-3.0-5.0-7.0107021-1363322-14.54.5-3.0-5.0-7.0107021-1463322-14.54.5-3.0-5.0-7.0107021-1563322-14.54.5-3.0-5.0-7.0107021-1663322-14.54.5-3.0-5.0-7.01015跨CBSC间的切换16•Inter-CBSCsofthandoffInter-CBSCSoftHandoff(1)CBSC1CBSC2-MSconnectstotwoBTSintwodifferentCBSCs,duringICSHO.-ThesignalingandtrafficinformationfromCBSC2(target)isbackhauledtoCBSC1(source).-CallcontrolishandledbyCBSC1-VoiceTrafficisusingIC-link,betweenCBSC1&2,andSourceMSC1isstillresponsibleforVoicehandling.1CBSCborderMSC1MSC217•Inter-CBSCsofthandoffInter-CBSCSoftHandoff(2)CBSC1CBSC22-AsMSproceedsintotheareaofCBSC2,itisrequiredtoperformanAnchorHandoff(akindofHardhandoff)-ThecontrolofthecallwillbemovedtoCBSC2withoutoccupyingresourcesinCBSC1andIC-link.-VoicehandlingwillbemovedtoMSC2.CBSCborderMSC1MSC218•AnchorHandoffTypes1.Keep_Soft:•NeverallowscontrolofthecalltobetransferredtothetargetCBSC.2.Legs_Remote:•PerformstheanchorhandoffwhentherearenoXCSECTORsoranchorsectorsintheactivesetfromtheperspectiveofthesourceCBSC.•VeryConservative.3.No_Legs:•PerformstheanchorhandoffwhennoanchorsectorsfromthesourceCBSCaretheintheactivelist.•Thequickest.4.No_Legs_Wait(Recommended):•PerformstheanchorhandoffwhentheNo_Legscriteriaandeitheroneofthefollowingconditionsaremet:–Thecallgoesinto1-waySHO.–ThebestactivepilotisTcompabovethesecondbestactivepilot.–Legs_Remotecriteriaismet.Inter-CBSCSoftHandoff(3)19HardHandoffInterCarrier--MAHOCarrier1&2ESESCarrier2切换发生于许多小区位于边界的情况下适用于大面积的边界的情况DAHOCarrier1Carrier1BTS1BTS2BTS1BTS2Carrier1Carrier1Carrier1&2导频指向有效时发生切换适用于局部或某地点的切换增加某一个基站的用户容量MAHOPBPBBTS1BTS2BTS3BTS1BTS2BTS3移动台支持/数据库支持的切换方式的对比21•DatabasesettingofMAHO(-Example)1.Checkcalldistribution,makesureHARDHANDINisROUNDROBINDISPLAYCBSC-14CALLDIST2.SetupIRIS2KandIRIS95tablesforDAHODISPLAYCBSC-22CALLDISTDISPLAYINROUTE-22-11IRIS95DISPLAYINROUTE-22-11IRIS2KEDITINROUTE-22-11IRIS95CARRIER1=283CARRIER2=0EDITINROUTE-22-11IRIS2KCARRIER1=283CARRIER2=0DISPLAYINROUTE-22-11IRIS95DISPLAYINROUTE-22-11IRIS2K3.DeletethecurrentneighboronbeaconsectorDISPLAYTCARRIER-22-242-1-201NEIGHBORDISPLAYTCARRIER-22-242-2-201NEIGHBORDISPLAYTCARRIER-22-242-3-201NEIGHBORDELETETCARRIER-22-242-1-201NEIGHBORDELETEALL=NENTRY1=2DISPLAYTBTS-22-242NEIGHBOR4.SetupCARRSOGSELtableDISPLAYBTS-242CARRSOGSELEDITSECTOR-242-2CARRSOGSELSOGNO=1CURRENTCAR=11TESTMOBILE=11ROUNDROBIN=11DISPLAYBTS-242CARRSOGSELDATABASESETTINGFORMAHO225.TurnofECCLMonCh201andupdateCHANNELLISTtabletomake1XmobilebeidleonCh283onbeaconsectorDISPLAYBT