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1、看1OG学5G(61)-NSA中终端5G小区信息获取小区搜索(CeI1SearCh)是终端接入5G无线网络的第一步,其过程包括:终端(UE)获取与5G小区的时间和频率同步,解码小区ID等。与1TE类似,在5G(NR)中小区搜索首先是通过解码主同步信号(PSS)和辅助同步信号(SSS)得到物理小区ID(PCI)o一、5G终端接入方法支持5G的终端(UE)可通过两种方法接入5G(NR)小区:非独立模式(NSA)网络中:EUTRA-NR双连接,终端通过锚点接入(ENDC);独立(SA)部署:终端直接接入NR小区二、NSA网络5G小区信息获取在NSA网络中终端接入EN-DC双连接的5G小区前,首先要获
2、取5G频率(NR-ARFCN)、小区ID、RACH参数等小区搜索信息;这些信息通过1TE的eNB通过RRC重配置消息提供,之后终端(UE)可尝试在NR小区的接A(RACH)0三、NSA网络终端5G小区接入实例支持5G的终端在接入1TE锚点小区后,根据异系统测量配置对5G无线小区进行测量;当上报的B1测量报告满足设定目标后,1TE锚点小区通过RRCConnectionReconfiguration消息向UE下发接入(RaCh)的命令;终图1.含有5G小区信息的RRC重配置消息4G锚点下发的RRC重配置(5G(NR)小区资源)RRC-MSG0.StruD1-DCCH-Messagc(I1CcchM
3、cssage1-O1OO-*rrcConnectionReconfigurationO1-rrc-TransactionIdentifierzOx1(1)202rrcConnectionReconfiguration-r8(4G锚点下发RRC重配置-R8版本)18F4nr-Config-r15(NR配置-R15版本)-1*setup-v15xO-IEs-11-*endc-Re1easeAndAdd-r15:FA1SE(ENDC释放增加R15版本)nr-SecondaryCe11GroupConfig-r15(NR-SCG小区组配置-R15版本)201800011一*RRCReconfigura
4、tion-NR(00-Frc-TransactionIdentifieriOxO(0)FrcReconfiguration(RRC重酉己智)2164O1100-*SecondaryCe11Group(辅小区组)23AA10101*Ce11GroupConfig-NR(NR小区组配置24E211100CeIIGrOUP1d:0x1(1)(NR小区组ID:1)r1c-BearerToAddMod1ist(R1C承戟墙加修改列表)25050000-*R1C-BearcrConfigt(R1C承载配置)26821*Iogica1Channe1Identity:0x1(1)逻辑信道ID:1)Served
5、RadioBearer(服务承教)27O10000-drb-Identity:Ox1(1)(DRBID:1)r1c-Config(R1C:配置)-000-*am(AM模式Ju1-AM-R1C(R1C上行AM)288ESn-FieId1ength:SiZeI8(1)(Sn长度:18)-000111-t-PoI1Retransmit:ms40(7)(PO11重传周期:4OnIS)2931OOI1-po1!PDU:p32(3)(PO11PDU:32)30BE10po11Byte:kB25(6)(t(P011比特:25kB)-111- maxRetxThrcsho1d:t32(7)(最大重传门限:32
6、)d1-AM-R1C(R1C下行AM模式)1Sn-Fie1d1engthzsize18(1)(sn长度:18)321000-t-StatusProhibit:ms40(8)priority:Oxf(15)(优先级:15)342D001.PriOritiSedBiIRate:kBps8(1)(优先级比特速率:8kBps).bucketSizeDuration:ms300(6)(令牌桶周期:30On1S)35CO11IOgiCa1Channe1GroUP:0x7(逻辑信道组:7).Schcdu1ingRcquestIDrOxO(0)(SRID:0)- -0-.IOgiCa1Chan11e1SR-M
7、ask:FA1SE(SR逻辑信道掩码:FA1SE)- .IogiCaIChannCISR-DCIayTimCrAPP1icd:FA1SESR逻辑信道延时应用:FA1SE)mac-Ce11GroupConfig(小区组MAC配置)36FDI1111-*.drx-Config1-*(DRX配置)setup0-*drx-onDurationTimer(DRX应用计时器)374301000-mi11iSeconds:ms20(8)(毫秒:ms20)38B810drx-Inac1ivityTimer:ms80(14)(DRX不活动计时器:ms80)- drx-HARQ-RTT-TimerD1:0x38(
8、56)(下行HARQRTT计时器:56)39EO111000-.drx-HARQ-RTT-TimcrU1:0x38(56)(上行HARQRTT计时器:56)40A5101drx-RetransmissionTimerD1:s18(5)(下行DRX重传计时器- 00101drx-RetransnissionTimerU1zs18(上行DRX重传计时器:5)drx-1ongCyc1eStartOffset(DRX长循环启始偏滞)424401000ms160:0x8(8)(160ms)432100drxSIo1Offse1:OXIO(16)(DRXS1OT偏滞)Schedu1ingRequestCo
9、nfig(SR配置)Schedu1ingRequestToAddMod1istSchedu1ingRequestToAddMod4411000Schcdu1ingRcquestIdrOxO(0)100Sr-ProhibitTimenms16(4)bsr-Config-00*(BSR配置)-0001-periodicBSR-Timcr:sf5(1)4608000FetxBSR-Timerisf1O(0)tag-Configtag-ToAddMod1istTAG-Info473C00tag-Id:OxO(0) -1H-IimcAIignmcntTimcrzinfinity(7)phrCOnfig(
10、PHR配置)setup48E111Phr-PeriodicTimerisfiOO(3) 100Phr-ProhibitTimerisf1OO(4) 00-Phr-Tx-PowerFactorChangeidB1(0)1mu11ip1cPHR:TRUE(多PHR配:TRUE)49210dummy:FA1SE 0phr-Type20thcrCc1kFA1SE .1Phr-ModeOIhCrCG:Vir1UaI .0skipUp1inkTxDynamic:FA1SEphysica1Ce11GroupConfig5157OIOp-NR-FR1:0x14(20) 1-一Pdsch-HARQ-ACK-Co
11、debookidynamic(I)SpCcIIConfig(SP小区配置)5260O1*servCc11Indcx:Ox1O(16),服务小区ID)reconfigurationWithSync(同步小区配置)53DD11*spCe11ConfigCommon(SP小区公共配56340PhySCenk1:0x148(328)(5G小区PCI=328)down1inkConfigCommon(下行公共配置).O11*frcqucncyInfoD1(5G小区下行中心频点)59EO1110abso1uteFrequencySSB:0x7b49e(504990)(5G小区下行中心频点=504990)f
12、requencyBand1ist(频段列表61OFOFreqBand1ndiCatorNR:Ox29(41)(5G小区频段=BAND41)6308OOOOIOO-abso1uteFrequencyPointA:0x7ad84(503172)(PointA频点=503172)Scs-SpecificCarrier1ist(我波子皱波间隔)640000SCS-SpecificCarrier65000000000-OffsetToCarrieriOxO(062O1subcarricrSpacing:kHz30(1)(载波子载波间隔=3OkHZ)67OC000CarrierBandwidthiOx1I
13、I(273)(小区带宽=273RB=IOOMhZ)Eitia1Dowii1inkBWP(初始下行BWP)gcnericParamctcrs69000000000-IOCa1ionAndBandWidth:0x3280(12928)(位置与带宽=12928)706BO1SubcarrierSpacing:kHz30(1)(子载波间隔=3OkHZ)Pdcch-ConfigCommon(PDCCH公共配*)1*setup71FA1111-Contro1ResourceSetZerozOxa(10)控制资源集O=Io)72470100SearChSPaCeZero:0x4(4)(搜索空间0=4)Ino
14、nSearchSpace1ist公共搜索空间列表)*SearchSpace1搜索空间)7440O1SearchSpaceId:Ox1(1)(搜索空间 0000Contro1ResourceSetIdiOxO(0),控制资源集ID=O)moni1oringS1otPcriodici1yAndOffscM时隙监控同期和偏滞设置)760000000000nonitoringSymbo1sWithinS1ot:10000000000000(2000)(S1ot内监控符号)nrofCandidates(NR候选7702000aggregation1eve1knO(0)(聚合等级1:n0)000-aggregation1eve12:nO(0)(聚合等级2:n0)78220aggrega1ion1eve14:n4(4)(聚合等级4:n4) 010-aggregation1eve18:n2(2)(聚合等级8:n2) -001-aggregation1eve116:n1(聚合等级1:n1)SearChSPaCeTyPe,搜索空间类型)mon(公共)7983