看LOG学5G(75)--UE的RRC建立过程.docx

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1、看1oG学5G(75)-UE的RRC建立过程#5G#无线网络#RRCSETUP终端RRC建立准备初始开机的5G终端(UE)在完成与无线网络(RAN)下行同步后，正确解码小区MIB和S1B消息，测量BRS,选定下行链路波束对。终端(UE)向无线网(RAN)发送RACH前导码，5G-RAN回复RACH响应；完成终端与网络的上行同步。一、终端(UE)RRC建立过程 根据业务或移动性管理需求终端(UE)向5G-RAN发送RRC连接建立请求。 5G-RAN为终端(UE)分配无线资源，回复RRC连接建立。 终端(UE)与5G-RAN间建立RRC连接，回复RRC连接建立完成。之后，终端(UE)与5G-RAN

2、间之间将根据需要进行RRC连接重新配置。UESGRAN1. SSzS12. RACHpreamb1e3. RandomAccessResponse4. RRCConnectionRequest5. RRCConnectionSetup6. RRCConnectionSetupComp1ete7. RRCConnectionReconfiguration8. RRCConnectionReconfigurationComp1ete图1.5G终端(UE)RRCSETUP流程二、无线网络中RRC建立在无线网络中的RRC建立请求消息”RRCSeIUPReqUest”消息先由终端(UE)通过空口(Uu)

3、发送到gNB;在gNB拆分为DU与CU的架构中DU将接收到的“IiIitia1U1RRCMeSSage”传递给CU;gNB根据终端(UE)的RRC建立请求为其分配无线资源，回复RRCSetup*;收到无线资源(承载)厉1终端(UE)回复RRCSetUPCOmPIete消息。TimeData1dMsg1dUe1dDirectionCe111dgNBId.P1MNRNTI202302-07-09:10:55.771UUV190630RRCSetupRequest98956rev113115630944600028842622-02-07-09:10:55.771F1INmA1U1_RRC_MESS

4、AGJTR_98956send11311563094j028842023-02-07-09:10:55.771F1INITIA1U1RRCMESSAGETR_98956rev113115630944600028842023-02-07-09:10:55.772UU.V190630RRCSetup98956Send1131港,洗司父Oj记字犯2023-02-07-09:10:5511UItV190630RRCSetUPComp1ete98956rev113115630944602884图2.无线网络中RRC建立过程三、终端（UE）RRC建立消息（部分注释）3.1.rrcSetupRequest（

5、终端RRC建立请求-原因）UuMsgmessaget=c1t=rrcSetupRcquestrrcSetupRequestFrcSetupRequestUeJdentity（UEID）t=randomVa1ue（随机接入码）randomVa1ue（随机接入码）numbits=39（随机接入码:39bits）data=00010110100000110101001011100110（M）（）1110（BIT）estab1ishmentCause=3:ES1ab1iShmentCause_Root_mo_Signa11ing（建立原因:3-InO信令）sparenumbits=1data=O（BI

6、T）3.2RRCSetUP（网络RRC建立-无线资源分配）UuMsgmessaget=c11=rrcSetupurrcSetuprrc_TransactionIdentifier=0（RRC传输ID:0）Critica1Extensionst=rrcSetuptOptF1agsIateNoncritica1ExtcnsionPresent=0nonCriticaIExtensionPrcsent=0radioBearerConfigtOptF1agsSrb-ToAddMod1istPresent=I（SRB新增修改=是）srb3_ToRe1easePresent=0drb_ToAddMod1i

7、stPresent=0drb_ToRc1ease1istPrcsent=0SecurityConfigPresent=0srb_ToAddMod1ist（SRB新增修改列表）n=1e1em0tOptF1agsFeestab1ishPDCPPresent=0discardOnPDCPPresent=Opdcp_ConfigPresent=1（PDCP层配置=是）srb_Identity=1（SRBID=I）pdcp_Config（PDCP层配置）IOptF1agsdrbPresent=OmoreThanOneR1CPresent=Ot_ReorderingPresent=1（重组配置=是）ver

8、Ext2Present=Ot_Reordering=31:PDCP_Config_t_Reordering_Root_ms2000（PDCP重组配置:2000ms）InasterCe11GrouptOptF1agsUjBcarerToAddMod1istPresent=1（R1C承载新增修改列表二是）r1c-BearerToRe1ease1istPresent=0mac_Ce1IGroupConfigPresent=I（MAC层小区组配置二是）Physicaice11GroupConfigPresent=0spCe11ConfigPresent=1（SP小区配置二是）Sce11ToAddMod

9、1istPresent=0Sce11ToRe1ease1istPresent=0verExt2Present=0Ce11GroupId=0HjBearerToAddMod1ist（R1C承载新增修改列表）n=1e1em0IOptF1agsServedRadioBcarerPresent=1（无线承载二是）reestab1ishR1CPresent=OHjConfigPresent=1（R1C层配置二是）Fnac-1ogica1Channe1ConfigPresent=1（MAC层逻辑信道配置=是）Iogica1ChanneIIdentity=1（逻辑信道ID=I）ServcdRadioBcar

10、ert=srb_Idcntitysrb_Identity=KSRBID=I）HjConfig（R1C层配置）t=am（传输模式=AM）UamU1AM_R1C（上行R1CAM配置）IOptF1agssn_Fidd1cngth=O:SN_Fic1d1engthAM_Root_size12CPo11Rctransmit=8:T_Po11Rctransmit_Root_ms45po11PDU=4:Po11PDU_Root_p64po11Byte=8:Po11Byte_Root_kB75maxRetxThresho1d=6:U1_AM_R1C_maxRetxThresho1d_Root_t16d1_AM

11、_R1C（下行R1CAM配置）tOptF1agssn_Fie1d1engthPresent=1sn_Fie1d1cngth=O:SN_Fic1d1engthAM_Root_size12t_Rcassemb1y=8:T_Rcassemb1y_Root_ms40CStatusProhibit=2:T_StatusProhibit_Root_ms10mac_1ogica1Channe1Config（MAC层逻辑信道配置）IOptF1agsu1_SpecificParametersPresent=1u1_SpecificParameterstOptF1agsa11owedServingCe11sPre

12、sent=Oa11owedSCS_1istPresent=OmaxPUSCH_DurationPresent=OConfiguredGrantType1A11owedPresent=OIogicaichanne1GroupPresent=1Schedu1ingRequestIDPresent=1bitRateQueryProhibitTimerPresent=Opriority=1PrioritiscdBitRate=15:1ogicaIChanneIConfig_u1_SpecificParameters_prioriiisedBitRate_Root_infinitybucketSizeD

13、uration=7:1ogica1Channe1Config_uI_SpecificParameters_bucketSizeDuration_Root_ms500Iogica1Channe1Group=OSchecIu1ingRequestID=OIogicaIChanne1SR-Mask=FA1SEIogiCaIChanne1SR_Dc1ayTimerApp1ied=FA1SEmac_Ce11GroupConfigIOptF1agsdrx_ConfigPresent=0Schedu1ingRequestConfigPresent=1bsr_ConfigPresent=1tag_Config

14、Present=1phr_ConfigPresent=1verExt2Present=OSchec1u1ingRequestConfig（SR配置）（OptF1agsSchcdu1ingRequestToAddMod1istPresent=1Schedu1ingRequestToRe1ease1istPresent=OSchedu1ingRequestToAddMod1istn=1e1emOtOptF1agsSjProhibitTimcrPrcsent=1Schcdu1ingRcquest1ci=Osr-ProhibitTimer=3:SChedUIingReqUeSIToAddMO1sjPr

15、ohibitTimejRoOjmS8SjTransMax=4:Schedu1ingRequestToAddMod_sr_TransMax_Root_n64bsr_Config（BSR配置）tOptF1agsIogica1Channe1SR-De1ayTimerPresent=OperiodicBSR_Timer=1:BSR_Config_periodicBSR_Timer_Root_sf5retxBSR_Timer=5:BSR_Config_retxBSR_Timer_Root_sf320tag_Config（TA（；配置）tOptF1ags1ag_ToRe1ease1istPresent=Otag_ToAddMod1istPresent=1tag_ToAddMod1istn=1e1em0tag_Id=OtimeA1ignmentTimer=7:TimeAIignmentTimeJROotJnfini1yphr_Config（PHR配置）t=setu