下行无线链路失败-LTE

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TS36.2134.2.1RadiolinkmonitoringThedownlinkradiolinkqualityoftheservingcellshallbemonitoredbytheUEforthepurposeofindicatingout-of-sync/in-syncstatustohigherlayers.Innon-DRXmodeoperation,thephysicallayerintheUEshalleveryradioframeassesstheradiolinkquality,evaluatedovertheprevioustimeperioddefinedin[10],againstthresholds(QoutandQin)definedbyrelevanttestsin[10].InDRXmodeoperation,thephysicallayerintheUEshallatleastonceeveryDRXperiodassesstheradiolinkquality,evaluatedovertheprevioustimeperioddefinedin[10],againstthresholds(QoutandQin)definedbyrelevanttestsin[10].ThephysicallayerintheUEshallinradioframeswheretheradiolinkqualityisassessedindicateout-of-synctohigherlayerswhentheradiolinkqualityisworsethanthethresholdQout.WhentheradiolinkqualityisbetterthanthethresholdQin,thephysicallayerintheUEshallinradioframeswheretheradiolinkqualityisassessedindicatein-synctohigherlayers.TS36.1337.6RadioLinkMonitoring7.6.1IntroductionTheUEshallmonitorthedownlinklinkqualitybasedonthecell-specificreferencesignalinordertodetectthedownlinkradiolinkqualityoftheservingcellasspecifiedin[3].TheUEshallestimatethedownlinkradiolinkqualityandcompareittothethresholdsQoutandQinforthepurposeofmonitoringdownlinkradiolinkqualityoftheservingcell.ThethresholdQoutisdefinedasthelevelatwhichthedownlinkradiolinkcannotbereliablyreceivedandshallcorrespondto[10%]blockerrorrateofahypotheticalPDCCHtransmissiontakingintoaccountthePCFICHerrorswithtransmissionparametersspecifiedinTable7.6.1-1.ThethresholdQinisdefinedasthelevelatwhichthedownlinkradiolinkqualitycanbesignificantlymorereliablyreceivedthanatQoutandshallcorrespondto[2%]blockerrorrateofahypotheticalPDCCHtransmissiontakingintoaccountthePCFICHerrorswithtransmissionparametersspecifiedinTable7.6.1-2.Table7.6.1-1PDCCH/PCFICHtransmissionparametersforout-of-syncAttributeValueDCIformat1A NumberofcontrolOFDMsymbols[2];Bandwidth³[10]MHz[3];[3]MHz£Bandwidth£[5]MHz[4];Bandwidth=[1.4]MHzAggregationlevel(CCE)4;Bandwidth=[1.4]MHz8;Bandwidth³[3]MHzRatioofPDCCHREenergytoaverageRSREenergy[4]dB;whensingleantennaportisusedforcell-specificreferencesignaltransmissionbytheservingcell[1]dB:whentwoorfourantennaportsareusedforcell-specificreferencesignaltransmissionbytheservingcellRatioofPCFICHREenergytoaverageRSREenergy[4]dB;whensingleantennaportisusedforcell-specificreferencesignaltransmissionbytheservingcell[1]dB:whentwoorfourantennaportsareusedforcell-specificreferencesignaltransmissionbytheservingcellNote1:DCIformat1Aisdefinedinsection5.3.3.1.3in3GPPTS36.212[21].Note2:AhypotheticalPCFICHtransmissioncorrespondingtothenumberofcontrolsymbolsshallbeassumed.Table7.6.1-2PDCCH/PCFICHtransmissionparametersforin-syncAttributeValueDCIformat1CNumberofcontrolOFDMsymbols[2];Bandwidth³[10]MHz[3];[3]MHz£Bandwidth£[5]MHz[4];Bandwidth=[1.4]MHzAggregationlevel(CCE)4RatioofPDCCHREenergytoaverageRSREenergy[0]dB;whensingleantennaportisusedforcell-specificreferencesignaltransmissionbytheservingcell[-3]dB;whentwoorfourantennaportsareusedforcell-specificreferencesignaltransmissionbytheservingcellRatioofPCFICHREenergyto[4]dB;whensingleantennaportisusedfor averageRSREenergycell-specificreferencesignaltransmissionbytheservingcell[1]dB:whentwoorfourantennaportsareusedforcell-specificreferencesignaltransmissionbytheservingcellNote1:DCIformat1Cisdefinedinsection5.3.3.1.4in3GPPTS36.212[21].Note2:AhypotheticalPCFICHtransmissioncorrespondingtothenumberofcontrolsymbolsshallbeassumed.7.6.2Requirements7.6.2.1MinimumrequirementwhennoDRXisusedWhenthedownlinkradiolinkqualityestimatedoverthelast[200]msperiodbecomesworsethanthethresholdQout,Layer1oftheUEshallsendanout-of-syncindicationtothehigherlayerswithin[200]msQoutevaluationperiod.ALayer3filtershallbeappliedtotheout-of-syncindicationsasspecifiedin[2].Whenthedownlinkradiolinkqualityestimatedoverthelast[100]msperiodbecomesbetterthanthethresholdQin,Layer1oftheUEshallsendanin-syncindicationtothehigherlayerswithin[100]msQinevaluationperiod.AL3filtershallbeappliedtothein-syncindicationsasspecifiedin[2].Theout-of-syncandin-syncevaluationsshallbeperformedasspecifiedinsection4.2.1in[3].TwosuccessiveindicationsfromLayer1shallbeseparatedbyatleast[10]ms.Thetransmitterpowershallbeturnedoffwithin[40]msafterexpiryofT310timerasspecifiedinsection5.3.11in[2].7.6.2.2MinimumrequirementwhenDRXisusedWhenDRXisusedtheQoutevaluationperiod(TEvaluate_Qout_DRX)andtheQinevaluationperiod(TEvaluate_Qin_DRX)isspecifiedinTable7.6.2.2-1willbeused.WhenthedownlinkradiolinkqualityestimatedoverthelastTEvaluate_Qout_DRX[s]periodbecomesworsethanthethresholdQout,Layer1oftheUEshallsendout-of-syncindicationtothehigherlayerswithinTEvaluate_Qout_DRX[s]evaluationperiod.ALayer3filtershallbeappliedtotheout-of-syncindicationsasspecifiedin[2].WhenthedownlinkradiolinkqualityestimatedoverthelastTEvaluate_Qin_DRX[s]periodbecomesbetterthanthethresholdQin,Layer1oftheUEshallsendin-syncindicationstothehigherlayerswithinTEvaluate_Qin_DRX[s]evaluationperiod.AL3filtershallbeappliedtothein-syncindicationsasspecifiedin[2].Theout-of-syncandin-syncevaluationsshallbeperformedasspecifiedinsection4.2.1in[3].TwosuccessiveindicationsfromLayer1shallbeseparatedbyatleastmax([10]ms,DRX_cycle_length). UponstartofT310timerasspecifiedinsection5.3.11in[2],theUEshallmonitorthelinkforrecoveryusingtheevaluationperiodandLayer1indicationintervalcorrespondingtothenon-DRXmodeuntiltheexpiryofT310timer.Thetransmitterpowershallbeturnedoffwithin[40]msafterexpiryofT310counterasspecifiedinsection5.3.11in[2].7.6.2.3Minimumrequirement at transitions Theout-of-syncandin-syncevaluationsshallbeperformedasspecifiedinsection4.2.1in[3].TwosuccessiveindicationsfromLayer1shallbeseparatedbyatleastmax([10]ms,DRX_cycle_length).WhentheUEtransitionsbetweenDRXandnon-DRXorwhenDRXcycleperiodicitychanges,foradurationoftimeequaltotheevaluationperiodcorrespondingto thesecondmodeafterthetransitionoccurs,theUEshalluseanevaluationperiodthatisnolessthantheminimumofevaluationperiodscorrespondingtothefirstmodeandthesecondmode.Subsequenttothisduration,theUEshalluseanevaluationperiodcorrespondingtothesecondmode.Thisrequirementshallbeappliedtobothout-of-syncevaluationandin-syncevaluation.Table7.6.2.2-1:QoutandQinEvaluationPeriodinDRXDRXcyclelength(s)TEvaluate_Qout_DRXandTEvaluate_Qin_DRX(s)(DRXcycles)≤0.04[Note(20)]0.08[0.8(10)]0.16[1.6(10)]0.32[3.2(10)]0.64[6.4(10)]1.28[6.4(5)]2.56[12.8(5)]Note:EvaluationperiodlengthintimedependsonthelengthoftheDRXcycleinuseTS36.3315.3.11Radiolinkfailurerelatedactions5.3.11.1DetectionofphysicallayerproblemsinRRC_CONNECTEDTheUEshall: 1>uponreceivingN310consecutive"out-of-sync"indicationsfromlowerlayerswhileneitherT300,T301,T304norT311isrunning:2>starttimerT310;5.3.11.2RecoveryofphysicallayerproblemsUponreceivingN311consecutive"in-sync"indicationsfromlowerlayerswhileT310isrunning,theUEshall:1>stoptimerT310;NOTE1:Inthiscase,theUEmaintainstheRRCconnectionwithoutexplicitsignalling,i.e.theUEmaintainstheentireradioresourceconfiguration.NOTE2:Periodsintimewhereneither"in-sync"nor"out-of-sync"isreportedbylayer1donotaffecttheevaluationofthenumberofconsecutive"in-sync"or"out-of-sync"indications.5.3.11.3DetectionofradiolinkfailureTheUEshall:1>uponT310expiry;or1>uponrandomaccessproblemindicationfromMACwhileneitherT300,T301,T304norT311isrunning;or1>uponindicationfromRLCthatthemaximumnumberofretransmissionshasbeenreached:2>considerradiolinkfailuretobedetected;2>ifASsecurityhasnotbeenactivated:3>performtheactionsuponleavingRRC_CONNECTEDasspecifiedin5.3.12,withreleasecause'other';2>else:3>initiatetheconnectionre-establishmentprocedureasspecifiedin5.3.7;