測量和測量處理

MEASUREMENTSANDMEASUREMENTPROCESSINGBSSPARS9MEASUREMENTS

Contents1.CodingLevelandQuality2.MSMeasurementsinIdleMode3.MSMeasurementsinDedicatedModeMEASUREMENTS

CodingofLevelandQualityLEVELQUALITYP(dBm)FS(dBuV/m)LEV-110270-109281-108292.........-498861-488962-479063

BER(%)BER(%)QUALRANGEMEAN<0.20.1400.2-0.40.2810.4-0.80.5720.8-1.61.1331.6-3.22.2643.2-6.44.5356.4-12.89.056>12.818.17

900MHzP=PowerFS=FieldStrengthLEV=LevelBSCBSCMEASUREMENTS

MSMeasurementsinIDLEMode

(GSMSpecs)MShastodecodeBCCHofserving(camped)cellevery30sMShastodecodeBCCHofadjacentcellsatleastevery5minPre-synchronizationandBSIC-decodingofneighboursOncein30sListof6bestneighboursisupdatedevery60sNewneighbourBCCHdecodingin30sMEASUREMENTS

MSMeasurementsinDEDICATEDMode(1)MeasurestheLevandQualoftheServerDetectswhetherDTXisused26-FRAMEMULTIFRAME120msTDMAFRAMES:TCHSACCHIDLE

MeasurestheBAfrequencies(SystemInfo5)BSICdecodingofatleastoneneighbourPre-SynchronizationonSCHTDMAFRAME4.615msSACCHPERIOD=480msRXTXRXTXRXTXMEASMEASMEASMEASUREMENTS

MSMeasurementsinDEDICATEDMode(2)

(GSMspecs)Pre-synchronizationandBSIC-decodingofadjacentcellsOncein10sNewneighbour5sdecodingBSIC+Pre-synchronizationIfnotsuccesfull->Oldneighbourlist+NewtryMeasurementresultsof6bestneighbourswillbesenttoBSCEverySACCHperiod480msec.MEASUREMENTPROCESSING

Contents1.Pre-ProcessinginBTS2.AveragingandSampling3.DTXandWeighting4.ProcessinginBSC5.Bookkeeping6.ParametersrelatedtoMeasurementsandMeasurementProcessingMEASUREMENTPROCESSING

GeneralMeasurementsBtsMeasAverageAveragingWindowSizeAdjCellAllAdjacentCellsAveragedNumberOfZeroResultsAveragingAveragingBookkeepingho/pc_Averaging_Lev/Qual_UL/DLWindowSizeWeightmsDistanceAveragingParameterWIndowSizeDTXModeMeasurementsHandover?EnaFastAveCallSetupEnaFastAvePCEnaFastAveHOMS+BTSMSBSCbtsMeasAver1...4(SACCHPeriod)Parameter

ValueMEASUREMENTPROCESSING

Pre-processinginBTSForMSandBTSmeasurementsAveragemeasurementsover1,2,3or4SACCH-periodCauseadelay(btsMeasAver-1)x480msReduceatransmissionloadandaprocessingloadinBSCNeededinAbisinterfacewhen16kbitsignalingisusedwithhalfrate.MEASUREMENTPROCESSING

AveragingandSamplingHoThresholdLevDL=33(=-77dBm)WindowSize=5,Weighting=1Px=3,Nx=4btsMeasAver=1(nopre-processinginBTS)302550354540152010480msAVERAGE=40,P=0AVERAGE=35,P=0AVERAGE=30,P=1AVERAGE=25,P=2AVERAGE=20,P=3Handoverattemptho/pc_Averaging_Lev/Qual_UL/DL WindowSize………………… 1…32 Weight………….. 1…3msDistanceAveragingParameter WIndowSize….…………… 1…32Parameter

ValueMEASUREMENTPROCESSING

FastAveragingNOKIATELECOMMUNICATIONSDLpowercontrol(RR)01110...01110...Px4Nx601DLhandover(RR)DLpowercontrol(RR)01110...00000...Px4Nx601DLhandover(RR)11100a.Newmethod(S6)b.Oldmethod0=HO/PCthresholdnottriggered1=HO/PCthresholdtriggeredOldtriggeredthresholdsTriggeredthresholdsafterPCMEASUREMENTPROCESSING

FastAveraging(2)Averagingwindowsizefull(size=4)23272624272427/1(27+23)/2(27+23+26+24)/4(27+23+26)/3whentheaveragingwindowisfull,anormalslidingwindowtechniqueisusedasintheexample:(23+26+24+27)/4(26+24+27+24)/4NOKIATELECOMMUNICATIONSAveragingstartedwithavailablesamplesLevelmeasurementsscaledafteraPCcommandSeparatelyonULandDLEnaFastAveCallSetup Y/NEnaFastAvePC Y/NEnaFastAveHO

Y/NParameter

ValueMEASUREMENTPROCESSING

VariousWindowSize(usedwithMSspeeddetection)slowMSsSlowmobileFastmobileTimeCellBTSfastMSsBSCBTSmeas_resmeas_resLengthofaveragingwindowsizeischangedaccordingtoMSspeedinformation.Fastmobilehasshortavaragingwindowsize->mobilesmayhandovertotargetcellfasterSlowmobilehaslongavaragingwindowsizemsSpeedDetectionState0: hobetweenmacro- microlayer1..100: thescalingfactorfor averagingwindowsize(%).42Scalingis50%MSSpeedDetectionState

ParameterTheBSCmayusetheinformationonthespeedofthemobilestationtodothefollowingbymeansoftheparameterMsSpeedDetectionState:0 MSspeedinformationisusedtocontroltrafficbetweenseparate layersofthemulti-layeredcellularnetworkbymeansofthe handoverprocedure.1-100 MSspeedinformationisusedtoscalethevaluesoftheaveraging parameters.Therangeisfrom1%to100%.Thatis,ifthevalueis, forexample,80%itmeansthattheaveragingwindowis80%of thenormalwindowsize.AV_RXLEV_UL_PC=2x35+1x42+...+2x352+1+2+2+1+1+1+2=36MEASUREMENTPROCESSING

DTXandWeightingDTXisallowedjustonTCHDTXisusedonlyforspeechcalls.“SUB”-measurementresultsareusedwhenDTXisusedSample: 1 2 3 4 5 6 7 8 DTXused: 0 1 0 0 1 1 1 0uplinklevel: 35 42 33 36 39 40 39 35ExamplepcAveragingLevULwindowSize =8weighting =2DTXMode 0 MSmayuseDTX 1 MSshalluseDTX

2 MSshallnotuseDTXParameter

ValueExampleallAdjacentCellsAveraged=NonumberOfZeroResults=2WindowSize=8Sample:MEASUREMENTPROCESSING

Book-keepingBSCisabletomaintainupto32lastmeasurementresultsof32adjacentcellsMobilereportstoBSC6bestresultsandtherestare0(=-110dBm)ZeroResultscanbeeliminatedfromaveraging(upto7)Alladjacentcellscanbeaveragedorjust6best(reportedbythemobileinthelastmeasurements)averagingWindowSizeAdjacentCells 1…32numberOfZeroResutlts 0…7allAdjacentCellsAveraged

Y/NParameter

Value