看log学5G(35)--无线信令承载SRB2.docx

《看log学5G(35)--无线信令承载SRB2.docx》由会员分享，可在线阅读，更多相关《看log学5G(35)--无线信令承载SRB2.docx（6页珍藏版）》请在第一文库网上搜索。

1、看1og学5G(35)-无线信令承载SRB2#5G#SRB2#无线网络SRB(Signa1ingRadioBearer)做为无线控制信令(RRC)的承载体，传递终端(UE)与无线网络(RAN)之间的控制和消息。一、SRB2在5G(NR)网络中SRB2消息是在终端完成鉴权认证和空口加密之后,终端(UE)与无线网(RAN)之间传递的加密消息。JED1SyncgNBXUaMfIrftynwanBiocrrMB;U1SyncSRBOSRBIRegisvatonRequestSywnWbrmeO1One11OerTyPef.:际PCFHe:NGAPXUEmmm0fstrtt1nRwsi.f-.NGAPN

2、SKMnMyRsponsNAS5cufVyMMCotvngna;NASProcedureIdentity*Auth*SMCWGAPNASA4hctfASSctxffyMbaCHyiRRCeOwcxRWonjatonS8ZDMAtgamtorAcceptSRBZDRBCConnconftcogwfonCowPNGAneeCanexrSfMpAspn3图1.5G无线网络SRB2配置流程图二、SRB2内容和优先级5G无线网络中SRB2的优先级低于SRB1,它在安全激活后始终由无线网络侧进行配置；SRB2用于无线链路控制和NAS消息，全部通过DCCH逻御亘道涉行信息的传递。其结构和内容见下表：RRCi

3、nformatione1ementsSRB11SSRB22SSRB3PDCP-Configt-Reordering(MAX)InfinityInfinityInfinityR1C-ConfigCHOICEAMAMAMu1-R1C-ConfigSn-FieId1engthsize12size12size12t-PoIIRetransmitms45ms45ms45po11PDUInfinityInfinityInfinitypo11ByteInfinityInfinityInfinitymaxRetxThresho1dt8t8t8d1-R1C-ConfigSn-FieId1engthsize12s

4、ize12size12t-Reassemb1yms35ms35ms35t-StatusProhibitmsmsmsIogica1Channe1Identity1231ogica1Channe1Configpriority131PrioritisedBitRateInfinityInfin；、.fIogicaIChanneIGroup0QY-图2.5G无线网络SRB结构及内容三、SRB2消息实例注释uc1t=rrcReconfigurationITjTranSaCIiOnIdentifier=1IOptF1agsFadioBearerConfigPresent=1Secondaryce1IGro

5、upPresent=0measConfigPresent=0IateNoncriticaIExtensionPresent=0nonCritica1ExtcnsionPresent=1radioBearerConfig(OptF1agsSrbeToAddMod1istPresent=1(SRB新增修改列表二是)srb3_ToRe1easePresent=Odrb_ToAddMod1istPresent=1drb-ToRe1ease1istPresent=0SecurityConfigPresent=OSrbJToAddMod1ist（SRB新增修改列表）n=1（数量=1）e1em0tOptF1

6、agsreestab1ishPDCPPrcscnt=OdiscardOnPDCPPrcsent=Opdcp_ConfigPresent=1（PDCP配置二是）SrbIdentity=2（SRBID=2）pdcp_Config（PDCP配置）tOptF1agsdrbPresent=OmorcThanOncR1CPresent=OCReorderingPresent=1（重组允许二是）verExt2Present=O1.Reordering=31:PDCP_Config_t_Reordering_Root_ms2000（PDCP重组周期=31:200OmS）（Jrb-ToAddMod1istn=1

7、nonCritica1ExtensiontOptF1agsmasterCe11GroupPresent=1fu11ConfigPresent=OdedicatedNAS_Message1istPresent=1（专用模式NAS消息列表1）masterKeyUpdatePresent=OdedicatedSIBI-De1iveryPresent=OC1edicatedsystem1nformationDe1iveryPresent=OOthcrConfigPresent=OnonCritica1ExensionPresent=OITiasterCe11Group（MCG小区组）tOptF1ags

8、F1ceBearerToAddMod1istPresent=1r1c-BearerToRe1ease1istPresent=0mac_Ce11GroupConfigPresent=0Physicaice11GroupConfigPresent=1spCe11ConfigPresent=1（SP小区配置二是）Sce11ToAddMod1istPresent=0sCe11ToRc1ease1istPrcscnt=0verExt2Present=0Ce11GroupId=0（MCGID=O）r1c_BearerToAddMod1ist（R1C承裁新增修改列表）n=2e1em0tOptF1agsSer

9、vedRadioBearerPresent=1（服务信令承载;是）reestab1ishR1CPresent=0r1c_ConfigPresent=I（R1C配置二是）mac_1ogica1Channe1ConfigPresent=1（MAC逻辑信道配置二是）Iogica1Channe1Identity=2（逻辑信道ID=2）SerVedRadiOBearer（服务承载）t=srb_Identity（SRBID）uSrbJden1i1y=2（SRBID=2）UjConfig（R1C层配置）t=am（传输模式=AM）uamI11AM_R1C（上行R1CAM传输）tOptF1agsSn-Fie1d

10、1engthPrcscnt=1（SN长度显示二是）sn_Fie1d1cngth=O:SN_Fic1d1engthAM_Root_size12（SN长度=0,AM模式SN长度12）CPo11Rctransmit=8:T_Po11Rctransmit_Root_ms45（令牌桶数据重传=8=45ms）po11PDU=4:Po11PDU_Roo1_p64（令牌桶PDU=4,p64）Po1IByte=8:Po11Byte_Root_kB75（令牌桶Byte=8r75kB）maxRetxThresho1d=6:U1_AM_R1C_maxRetxThresho1d_Roo1_t16（最大重传门限”6次）d

11、1_AM_R1C（下行R1CAM传输）（OptF1agssn_Fie1d1engthPresent=ISN长度显示二是）sn-Fie1d1ength=O:SN_Fie1d1engthAM_Root_size12（SN长度=0,AM模式SN长度12）JReassemb1y=8:T_Reassemb1y_Root_ms40（重组周期=8:4OrnS）t_StatusProhibit=2:T_StatusProhibit_Root_ms1O（状态禁止周期=2,IOms）mac_1ogica1Channe1Config（逻辑信道配置）IOptF1agsu1_SpecificParametersPres

12、ent=1（上行特定参数=是）U1SpecificParametersIOptF1agsa11owedServingCe11sPresent=0a11owedSCS_1istPresent=0maxPUSCH_DurationPresent=0ConfiguredGrantType1A11owedPresent=0Iogicaichanne1GroupPresent=1（逻辑信道组=是）SchcduiingRcquest1DPrcscnt=1（调度请求ID=是）bitRateQueryProhibitTimerPresent=0priority=3（优先级=3）PrioritisedBitRa

13、te=15:1ogica1Channe1Config_u1_SpecificParameters_prioritisedBitRate_Root_inHnity（优先级比特二15,上行逻辑信道特定参数优先级比特infinity）bucketSizeDuration=4:1ogica1Channe1Config_u1_SpccificParamcters_bucketSizeDuration_Root_ms1OO（令牌桶周期=4,上行逻辑信道特定参数令牌桶大小周期:ms100）Iogica1Channc1Group=0Schedu1ingRcqucstID=0IogicaIChanne1SR-Mask=FA1SEIogica1ChanneiSR-De1ayTimerApp1ied=FA1SE