看Log学5G(89)--共享网络及寻呼消息传递.docx

看1og学5G(89)-共享网络及寻呼消息传递#无线网络#5G#Paging#NG#F1为了节省无线网络建设成本，弥补自身网络覆盖不足；共建共享已成为运营商之间网络合作方式之一；在仅共享无线网络(RAN),核心网各自独立的场景中无线网络中的寻呼消息呈现以下两个特点：共享(公无线网)站点中NG接口只传递运营商(各自核心网-P1MN)的寻呼消息；F1接口和空口(Uu)传递和发送主运营商和共享运营商网络的寻呼消息；根据规范，5G网络中对处于RRCId1e或InaCtiVe状态的终端，当有下行数据到达时启动寻呼，其具体流程如下。一、下行数据到达5G网络有下行数据到达时首先由DN下发给UPF；当探测到UE处于RRCInaCtiVe或IdIe状态时，UPF将数据进行缓存后通知AMF”有数据到达”；得到消息后核心网AMF单元发起寻呼流程(见图1);Donn1mkd*abuffered3000O图1.下行数据到达触发寻呼二、无线网单元与接口寻呼消息传递5G基站进行拆分为CU和DU后，无线网(RAN)通过NG接口接收寻呼消息；gNB收到寻呼消息后，由基站内部的CU通过FI接口传递到DU,再传送至天线通过空口发送。5GCore图2.5G主要网元与接口三、5G寻呼消息传送在无线网元拆分场景中先通过NG接口传递到图3.寻呼消息在无线网中传递四、NG接口寻呼消息(注释)NgapMsgt=InitiatingMessageUproccdureCode=pPagingunion_va1uepPagingprotoco1IEstOptF1agsPagingDRXPresent=0(寻呼DRX:否)PagingPriorityPresent=0(寻呼优先级:否UERadiocapabi1ityForPagingPresent=0（寻呼中UE无线能力=否）PagingOriginPresent=0（原始寻呼=否）assistanccDataForPagingPrcsent=0（寻呼携带数据=否）UEPagingIdentity（终端寻呼ID）t=fiveG_S_TMSI（5G-S-TMSI）ufiveG_S_TMSItOptF1agsiE_ExtensionsPresent=0（扩展信息=否）aMFSetID（AMF集ID）numbits=10data=01000000IO（BIT）aMFPointernumbits=6data=000（）0（）（BIT）fiveG_TMSInocts=4data=287994aa（HEX）tAI1istForPaging（寻呼的TA1列表）n=1e1em0tOptF1agsiE_ExtensionsPresent=0tAItOptF1agsiE_ExtensionsPresent=0p1MNIdentitynocts=3data=64fIO（HEX）tACnocts=3data=4cb2OO（HEX）五、F1接口寻呼消息解析F1apMsgt=InitiatingMessageuinitiatingMessageprocedureCode=pPagingunion_va1uepPagingprotoco1IEstOptF1agsPagingDRXPresent=0PagingPriorityPresent=0UE1dCntityIndeXVaI1Ie（终端ID指示）t=index1ength1O（指示长度）Uindcx1ength1Onumbits=10data=01110011I1（BIT）pagingidentity（寻呼ID）t=CNUEPagingIdentityuCNUEPaging1dentity（核心网UE寻呼ID）t=fiveG_S_TMSIufiveG_S_TMSInumbits=48data=11O1890()f1cf(HEX)Pagii1gCe1u1iSt(寻呼小区列表)n=4e1em0tOptF1agsiE_ExtensionsPresent=0nRCGIIOptF1agsiE_ExtensionsPresent=0p1MN_Identitynocts=3data=64fI1(HEX)nRCe1IIdentity(<sEID)numbits=36data=01001101011000000001011100000000OOO1(BIT)e1em1tOptF1ags正-Ex1ensionsPresent=0nRCGItOptF1agsiE_ExtensionsPresent=0p1MN_Identitynocts=3data=64f()I1(HEX)nRCe111dentitynumbits=36data=01001101011000000001011100000000OO1O(BIT)e1em2tOptF1agsiE_ExtensionsPresent=0nRCGItOptF1agsiE_ExtensionsPresent=0p1MN_1dcntitynocts=3data=64f()I1(HEX)nRCe111dentitynumbits=36data=01001101011000000001011100000000OIOO(BIT)e1em31tOptF1agsiE_ExtensionsPresent=0nRCGItOptF1agsiEeExtensionsPresent=0p1MN_Identitynocts=3data=64fI1(HEX)nRCe111dentitynumbits=36data=010011010110000000010111()0000000O1O1(BIT)