CDMA优化-切换和功控与信令.ppt

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1、CDMA系统切换，功控培训讲义1软切换(MAHO)和硬切换对比SofthandoffcanbeperformedinthesamecarrierlayerHighqualityhandoffthrough“makebeforebreak”processDifferentalgorithmmaybeusedtominimizeSHOregiontoreducesystemresourcesconsumption.GSMHardHandoffDistanceCellACellBSoftHandoffSignalStrengthABCD

2、MASoftHandoffBreakbeforeMakeMakebeforeBreak2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。3July,19987

3、-46RF100(c)1998ScottBaxter导频搜索顺序Thesearchercheckspilotsinnestedloops,muchlikemeshedgears.Activesandcandidatesoccupythefastest-spinningwheel.Neighborsarenext,advancingonepilotforeachAct+Cand.revolution.Remainingisslowest,advancingonepiloteachtimetheNeighborsrevolve.CUR

4、RENTPILOTSETCONTENTSAAACNNNNNNNNNNNNRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR3112112PILOTSEARCHERVIEWEDINSEQUENCE:TypicalElapsedTime=4secondsAAACNRAAACAAACAAACAAACAAACAAACNNNNNNAAACNAAACAAACAAACAAA

5、CAAACAAACNNNNNAAACNAAACAAACAAACAAACAAACAAACNNNNNNNAAACAAACAAACNNNRAAACNAAACAAACAAANNCAAACAAACNNNRAAACNAAACAAACAAANNCAAANCAAACNNOnly3of112remainingsetpilotshavebeencheckedthusfar!ANRRRRRRRNNNNNNNNAA4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TIME

6、123456785678910111213命令格式jilin_omc-005417>dispcbsc-7021hoconstrusersHOCONSTR

7、HOCONSTRUSER(cbsc#-hoconstr#)

8、-----------------

9、--------------------7021-1ICTRKGRP-7021-17021-1ICTRKGRP-7021-137021-1CARRIER-271-1-2837021-1CARRIER-271-2-2837021-1CARRIER-917-1-2837021-1CARRI

10、ER-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-005417>dispcbsc-7021detection

11、MAXACTIVE-

12、MAXCEPER-

13、MAXBTS-

14、MAXBTS-

15、MAXBTS-

16、TCOMPENA-

17、

18、XCTCOMP

19、AGG-

20、AGG-

21、AGG-

22、NUM-

23、HOCONSTR

24、SETSIZE

25、CALL

26、LEGS1

27、LEGS2

28、LEGS3

29、THRSH

30、

31、STRENGTH1

32、STRENGTH2

33、STRENGTH3

34、CANDIDATE

35、R(cbsc#-