看LOG学5G(17)-终端初始上下文建立.docx

看1oG学5G(17)-终端初始上下文建立#5G#UE#上下文在5G(NR)网络中终端(UE)初始上下文(IN1TIA1CoNTEXT)设置目的是在NG-RAN节点上建立必要的整体初始UE上下文，其中包括:PDU会话上下文、安全密钥、移动限制列表、UE无线能力和安全能力等。一、终端初始上下文建立流程触发5G终端(UE)中如存在相关的NG逻辑连接，或AMF在INrnA1UEMESSAGE消息中接收到RANUENGAPIDIE,或NG-RAN节点已经启动则AMF启动初始上下文设置流程，或通过另一个NG接口实例发送INITIA1UEMESSAGE消息来建立与UE相关的NG逻辑连接。对于仅信令连接，如在初始UE消息中未接收到UE上下文请求IE,则AMF可配置为根据运营商的配置触发所有NAS过程或基于每个NAS消息传送过程。NG-RANnodeINIA1CONTEXTSETUPREQUESTINITIA1CONTEXTSETUPRESPONSE(卜一>钊巷远孚北图1AMF启动初始上下文建立过程二、终端(UE)初始上下文建立流程在建立PDU会话情况下5GC应在AMF接收到INrnA1CONTEXTSETUPRESPoNSE消息之前准备好接收用户数据。如果不存在与UE相关的逻辑NG连接，则应在接收至IJ1NmA1CONTEXTSETUPREQUEST消息时建立与UE相关的逻辑NG连接。如在AMF可用的情况下INITIA1CONTEXTSETUPREQUEST消息应包含RAT索引/频率选择优先级IEo）TimeqDaUIdMsg1dUc1dCd11dgNBId.P1MN1engthDirectionRNT12023-02-07-09:13:30.026UUwVI9.RRCSetup783021131156309446049send2882023-02-07-09:13:30.026UU.V19-RRCSetupRequest783021131563094.460006rev2882023-02-07-09:13:30.051UU.V19-RRCetupComp1ete7830211311563094.4600049rev2882023-02-07-09:13:30.051NG.V19-INrnA1UE.MESSAGE7830211311563094_4600099send2882023-02-07-09:1330.078NG.V1INmA1-CONTEXT>ETUPREQUEST7830211311563094-4602038rev2882023-02-07-09:13:30.079UU_V19SecurityModeCommand783021131563094_460003send2882023-02-07-09:130,083F1UE-CONTEX1SETUP.REQUEST7830211311563094_46（XX）1977rev2882023-02-07-09:130,083F1UE,NTXT,SETUP,REQUEST7830211311563094_460001977send2882023-02-07-09:130,088F1UE.NTEXT,SETUP.RESPONSE7830211311563094,46（XX）444send2882023-02-07-09:13:30.088F1UE.NTEXTSETUP.RESPONSE7830211311563094.460444rev2882023-02-07-09:13:30.088UU_V19RRCReconfiguration7830211311563094.460408send2882023-02-07-09:13:30.090UUeeV19SecurityModeCompIete7830211311563094-402rev2882023-02-07-09:13:30.116F1UECONTEXT-MODIFICAUONREQUEST7830211311563094w46037rev2882023-02-07-09:13:30.116F1UE.CONTEXT.MOD1F1eATION.RESPON.78302113115634J60534send2882023-02-07-09:13:30.116F1UE-CONTEXT-MODIFICATION-REQUEST7830211311563094-46037send2882023-02-07-09:13:30.116UUV19.RRcReconfigurationCompIete78302113115630944602rev2882023-02-07-09:13:30.116F1UE_CONTEXT_MODIF1aT1ON_RESPoN783021131563094_46000534rev288|2023-02-07-09：130.116NG.V1INITIA1-CONTEXTJETUP.RESPONSE78302113115630944600047send2882023-02-07-09:130,119F1UE_8NTEXT_MOD旧CAT1ON.REQUEST7830211311563094；C"和老原起字购2023-02-07-09:130,119F1UE.NTEXT.MODIFICATION.REQUEST7830211311563094.4600041send288图2.初始上下文建立请求和响应三、终端(UE)初始上下文建立消息注释31Initia1ContextSetupReqest(初始上下文建立请求)NgapMsgt=initiatingMcssagcproccdurcCodc=PInitia1eOntCXtSetUPReqUeSt（初始上下文建立请求）union_va1ueP1nitiaicontextSetupRequestprotoco1IEstOptF1agsO1dAMFPresent=0（原AMF=无）UEAggregateMaximumBitRatePresent=0（UE聚合最大速率二无）CorcNetworkAssistance1nformationFor1nactivePresent=1（核心网支持不活动状态指示二是）PDUSeSSionReSOUrCeSeIUP1iSICX1ReqPreSent=0traceActivaiionPresent=I（TRACE激活=是）nAS_PDUPresen1=1（NAS层PDU二是）emergencyFa1IbackIndicatorPresent=0aMF_UE_NGAP_ID=446628041（UE的AMF+NG中ID）rAN_UE_NGAP_ID=98956（UE的RAN+NG中ID）CoreNetworkAssistance1nformationForInactiveIOptFiags）。O。OuEIdentityIndexVa1ue（UEID值）t=index1ength1Ouindex1ength1Onumbits=IO（UEID=IO比特）data=IO1IO110OO（B1T）（UEID）PeriodicRegistrationUpdateTimer（周期注册更新计时器）numbits=8（8比特）data=05（HEX）（周期注册更新计时器=5）IAI1istForInactive（终端InactiveTA列表）（A1tOptF1agsiE_ExtensionsPresent=OP1MNIdentity（P1MNID）nocts=3data=64f00（HEX）（P1MN=46000）tAC（TACf）nocts=3（3比特）data=1270cO（HEX）（TAC值一十六进值）gUAMI（终端的GUAMI）tOptF1agsiE_ExtensionsPresent=0p1MNIdentitynocts=3data=64f00（HEX）（P1MN=46000）aMFRegionID（AMF域ID）numbits=8（比特数=8）data=08（HEX）（AMF区域IDi08-十六进制）aMFSetID（AMF集ID）nmbits=10（比特数=10）data=0000000000（BIT）（AMF集ID）aMFPointer（AMFPointID）numbits=6（比特数=6）data=001000（BIT）（AMFPointID=Oo1OOO.二进制）a11owedNSSAI（允许切片标识=NSSAI）n=1iE_ExtensionsPresent=0s_NSSAICOp1F1agssST（切片服务类型）nocts=Idata=O1（HEX）（支持切片=1,eMBB）UESeeUrityC叩abi1ities（终端加密）（OptFIagsiE-ExtensionsPresent=0nRcncryptionA1gorithms（NR加密算法）numbits=16data=eOOO（HEX）（加密算法=e）nRintegrityProtectionA1gorithms（NR完整性保护算法）numbits=16data=eOOO（HEX）（完整性保护算法=eO）eUTRAencryptionA1gorithms（Eutran加密算法）numbits=16data=eOOO（HEX）（加密算法=e）eUTRAintegrityProtectionA1gorithmsnumbits=16data=eOOO（HEX）（完整性保护算法=e）SecurityKeynumbits=256（密钥=256位）data=ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff（HEX）（密钥报文）IraceActivationnGRANTrace1D（NR无线TRACEID）nocts=8data=64fOO76086400OO（HEX）interfacesToTrace（TRzCE接口）numbits=8data=f8（HEX）traceDepth=0:Ngap_TraceDepth_Root_minimum（TRACE深度=最小）traceCo11ectionEntityIPAddress（TRACE收集IP地址）numbits=32data=000000OO（HEX）nAS.PDU（nas层PDU）nocts=50data=ffffffffffffffffffffffffffffffffffffff