GSM测量讲解.ppt

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1、MEASUREMENTSANDMEASUREMENTPROCESSINGBSSPARS9MEASUREMENTSContents1.CodingLevelandQuality2.MSMeasurementsinIdleMode3.MSMeasurementsinDedicatedModeMEASUREMENTSCodingofLevelandQualityLEVELQUALITYP(dBm)FS(dBuV/m)LEV-110270-109281-108292.........-498861-488962-479063BER(%)BER(%)QUALRANGEMEAN<0.20.14

2、00.2-0.40.2810.4-0.80.5720.8-1.61.1331.6-3.22.2643.2-6.44.5356.4-12.89.056>12.818.17900MHzP=PowerFS=FieldStrengthLEV=LevelBSCBSCMEASUREMENTSMSMeasurementsinIDLEMode(GSMSpecs)MShastodecodeBCCHofserving(camped)cellevery30sMShastodecodeBCCHofadjacentcellsatleastevery5minPre-synchronizationandBSIC-

3、decodingofneighboursOncein30sListof6bestneighboursisupdatedevery60sNewneighbourBCCHdecodingin30sMEASUREMENTSMSMeasurementsinDEDICATEDMode(1)MeasurestheLevandQualoftheServerDetectswhetherDTXisused26-FRAMEMULTIFRAME120msTDMAFRAMES:TCHSACCHIDLEMeasurestheBAfrequencies(SystemInfo5)BSICdecodingofatl

4、eastoneneighbourPre-SynchronizationonSCHTDMAFRAME4.615msSACCHPERIOD=480msRXTXRXTXRXTXMEASMEASMEASMEASUREMENTSMSMeasurementsinDEDICATEDMode(2)(GSMspecs)Pre-synchronizationandBSIC-decodingofadjacentcellsOncein10sNewneighbour5sdecodingBSIC+Pre-synchronizationIfnotsuccesfull->Oldneighbourlist+Newtr

5、yMeasurementresultsof6bestneighbourswillbesenttoBSCEverySACCHperiod480msec.MEASUREMENTPROCESSINGContents1.Pre-ProcessinginBTS2.AveragingandSampling3.DTXandWeighting4.ProcessinginBSC5.Bookkeeping6.ParametersrelatedtoMeasurementsandMeasurementProcessingMEASUREMENTPROCESSINGGeneralMeasurementsBts

6、MeasAverageAveragingWindowSizeAdjCellAllAdjacentCellsAveragedNumberOfZeroResultsAveragingAveragingBookkeepingho/pc_Averaging_Lev/Qual_UL/DLWindowSizeWeightmsDistanceAveragingParameterWIndowSizeDTXModeMeasurementsHandover?EnaFastAveCallSetupEnaFastAvePCEnaFastAveHOMS+BTSMSBSCbtsMeasAver1...4(SACC

7、HPeriod)ParameterValueMEASUREMENTPROCESSINGPre-processinginBTSForMSandBTSmeasurementsAveragemeasurementsover1,2,3or4SACCH-periodCauseadelay(btsMeasAver-1)x480msReduceatransmissionloadandaprocessingloadinBSCNeededinAbisinter