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1、看1oG学5G(53)-5G到4G之切换命令#5G#4G#handover一、终端5G到4G切换5G终端由于业务(EPSFB)或覆盖原因将从5G网络切换到4G网络,切换的全部过程是在网络控制下完成的。图1.终端从5G到4G切换相关网元二、5G到4G切换命令收到终端(UE)上报的(4G邻区)测量报告(看1OG学5G(52)-5G到4G切换之测量配置和报告Origina1)后,5G服务小区向终端发出“Mobi1ityFromNRCommand”的切换命令,之后4G(待切入小区)在RRcconnectionReconfiguration”消息中为UE配置接入的无线资源。TImt(57:59.1510
2、957:594510M7:琅W0M8O0910980Q92gAAAMSOUrC.MSIMSIM$1MSIMSI1KIOimwwIU1-O-.PCCHKCHD1O-U1-O-DirectionMS9NodeB9N0de-MSg1Mode8MSgNode8-MSMS9N0de81tC%NXAMS1McWRRCfUconguraofomp*eteTimSourceCwnt09:57:50.675MS1NRIUgiftrAtionSuc85755.030M$1NREeHtA309:5755,045MSINRIntraFreqHOAttempt09:5755.045MS1NRHandoverAnemfM
3、09:57:58.072MSINREwotA1g57580WMSINRHandoverAttemp109:5758,092MSINR1ntreFreqMQAttemptO95ft.635MSINREventBIInformation09879MS1D1O-eNodeBMSg58:OM40MS1SDMSNod8g58860958O820958K182658:0088,0W8g8920958O8990M8901MS1M$1MSIMSIM$1MSIMSIc-o.NoMMSeNode8eNode-MSMSNoMSgNodeMSRRCCocr*ectioReon#9urwtonRdioBererCon1
4、ity1nfonntonRRCCcnnect0nRec0n9urti0nRRCConnctionRcorAgrMonConMMerInformMionBiockUC4pbiyinquiryFreqBand1istNRMS109:58,858MSIITEji(XnACCE095a,964MSIUETAUPdateAttefnp8zSaQ1.065MS1UETAUPdMKUC53S5TM09:5M16M09:5&01.644yveMSIMSIMSI1TEEwtA1ITEEEtA1ITEEywU12A11MSM51EEM:i:XcrgetPImMId:1:$C.aPa:346:jC111t$R497
5、:NEIScurcePChM65rcNRARKNrXM990jTrgetPSCUrSpO:“$oUrCNNFCM504996TrgwPmead,er0300000011T.StruD1-DCCH-Messaged1dcchmessage140O*C1-IOOO-*InobiIityFromNRCommand(NR移动-切换命令)OO-rrc-TransactionIdentifierzOxO(O)CriticaiExtensionsO*ITiobi1ityFromNRCommand280IOO*-OOO-IargeIRATTypc:CU1ra(O)(切换目标网络类型:EUTRA)2.4GRRC
6、ConnectionReconfiguration消息4G切换(入)小区在RRCConnectionReconfiguration(mobi1ityContro1Info)”消息中定义了切换的相关内容。RRC-MSG.msg0O100000001.StruD1-DCCH-Messaged1CcchMessage1220*c1-0100*rrcConnectionReconfigurationO1-rrc-TransacionIdcntifierOx1(1)CriticaIExtensions-0*2OA000rrcConnectionReconfiguration-r8-010103BDI-*
7、ITiobi1ityContro1Info(移动-切换控制信息)4230010001-IargetPhySCeI11d:0x91(145)(目标小区PCI=I45)CarrierFreq(载波频率)1;61400010100d1-CairicrFrcq:0x514(1300)(下行频率I1300)86401100100u1-CarrierFreq:0x4b64(19300)(上行频率:19300)CarrierBandwidth(载波带宽)9AAI-*-O1O1-d1-Bandwidth:n100(5)(下行带宽20M,100RB)01010831UI-BandWid1h:n1OO(5)(上行
8、带宽20M,100RB- 00000additiona1SpectrumEmission:Ox1(1)1111000t304:ms2000(6)(T304:2000ms)-0000000137F0newUE-Identity:0000000000000000(00OO)(UE*rid:0000)radioResourceConfigCommon(公共无线资源配置-111111114CE110*Fach-ConfigCommon:接入公共配置)- 0*preamb1einfo(PreambIe信息)111015180numbcrOfRA-Prcamb1es:n52(12)(接入Prea1nb1e
9、数量:52个)rcamb1csGroupAConfig(GroupAPreamb1e配置)-0- 0110-sizeOfRA-Preamb1esGroupA:n28(6)(GroupApreamb1e28)00messageSizeGroupArb56(0)(GroupA信息尺寸:56bit)68C100messagePowerOffsetGroupB:dB10(4)(GrOUPB功率偏滞IodB)PoWerRamPingParameterS(终端功率攀升参数)01-PoWCrRamPingS1ep:dB2(1)(功率攀升步长:2dB)10017370-Preamb1e1nitia1Recei
10、vedTargetPowerrdBiTi-104(8)(PreambIe初始目标功率-104dBm)raSupervision!nfo(接收窗信息)-O11O-Preamb1eTransMaxin1O(6)(PreambIe最大发送次数:10)I11ra-ResponseWindowSize:sf1O(7)(RA接收窗尺寸:10Sf)18F3111mac-ContentionResoIutionTimer:sf64(7)(MAC层竞争定时器:64Sf)100-maxHARQ-Msg3Tx:Ox5(5)(MSG3HARQ最大发送5次)prach-Config(PRACHKS)1-*120060r
11、ootSequenceIndex:0x268(616)根据序列指示:616)prach-ConfigInfo(PRACH配置信息)-000011-PraCh-ConfigIndeX:0x3(3)(PRACH配置ID:3)0highSpeedF1ag:FA1SE(高速指示:FA1SE)21BO1011zeroCorre1ationZoneConfigOxb(11)(zcEJE:11)-000022D3110PraCh-FreqOffSet:0x6(6)(PRACH频率偏滞:6)Pdsch-ConfigCominon(PDSCH公共配Jt)1001123IC00refcrcnceSigna1Pow
12、er:OXIo(16)I参考信号功率:16)- O1-p-b:0x1(1)(PB:1)PUSCh-ConfigCommon(PUSCH公共配置)Pusch-ConfigBasic(PUSCH基础配置)- -11-n-SB:0x4(4)- 0-hoppingModeinterSubFrane(0)(跳频模式:子帧间)02402000000Pusch-HoppingOffsetiOxO(0)(PUSCH跳频偏滞:0)- 1-enab1e64QAM:TRUE(64QAM支持:是)u1-RcferenceSigna1sPUSCH(上行PUSCH弁考信号)- 0groupHoppingEnab1cd:F
13、A1SE组跳频支持:否)250000000groupAssignmentPUSCH:OxO(0)(PUSCH坦指定:0)- 0SeqUenCeHoPPingEnab1ed:FA1SE(跳频序列支持:否)0026200CyCIiCShift:0x0(0)(循环移位:0)phich-Config(PHICH配置)- 0Phich-Durationinorma1(0)(PHICH周期:0)- 10Phich-Resourceione(2)(PHICH资源:1)pucch-ConfigCommon(PUCCH公共配置)- -00-dc1taPUCCH-Shifcds1(0)002708OOOO1-nRB-CQI:Ox1(1)000nCS-AN:0x0(0)2942OIOn1PUCCH-AN:0x12(18)SoundingRS-U1-ConfigCommon-0*re1ease:NU11UP1inkPOWerCOntro1COrnmOn(上行公共功率控制)307A01I1-p0-Nomina