注册流程(Registration)UE做业务之前,第一步就是在网络上进行注册,所以,注册流程是所有流程中最重要也最全面的一个步骤,这个流程理解并掌握了,对后面的TAUk切换等流程均有帮助,根据规范可知,注册流程涉及UE和网络的定时器如下:AMFUEREGISTRATIONREQUESTIfTempIDallocatedStartT3550StartT3510REGISTRATIONACCEPTStopT3510StopT3550REGISTRATIONCOMPLETEIfTempIDallocatedORREGISTRATIONREQUESTStartT3510REGISTRATIONREJECTStopT3510注册类型用3bit来进行指定,目前分为4中类型,如下:initialregistrationmobilityregistrationupdatingperiodicregistrationupdatingemergencyregistration注册结果也是由3bit来进行表示,分为3类,如下:3GPPaccessNon-3GPPaccess3GPPaccessandnon-3GPPaccess服务类型由4bit位进行表示,如下:signallingdatamobileterminatedservicesemergencyservicesemergencyservicesfallbackhighpriorityaccesselevatedsignallingunused;shallbeinterpretedas"signalling",ifreceivedbythenetworkunused;shallbeinterpretedas"signalling",ifreceivedbythenetworkunused;shallbeinterpretedas"data",ifreceivedbythenetworkunused;shallbeinterpretedas"data",ifreceivedbythenetworkunused;shallbeinterpretedas"data",ifreceivedbythenetwork关于注册识别原因值,我在另外一篇文章中有详细介绍,感兴趣的可以去找一找。几个相关的缩写术语:SUCI(SubscriptionConcealedIdentifier)订阅隐藏标识符:是一个隐私保护标识符,包含隐藏的SUPI,组成如下:SUCIRoutingIndicator1-4digitsProtectionSchemeIdvalueinrange015HomeNetworkSchemeOutputPublicKeyIdvalueinrangeformatdependenton0—255protectionschemeSUPITypeHomeNetworkIdentifier<><>valueinrangeformatdependent07onSUPItypeSUPI(SubscriptionPermanentIdentifier)订阅永久标识符:SUPI是分配给5G系统中每个用户的全球唯一5G订阅永久标识符。SUPI类型indicateanIMSI,anetworkspecificidentifier,aGlobalLineIdentifier(GLI)oraGlobalCableIdentifier(GCI)5G-GUTI(5GGloballyUniqueTemporaryIdentifier):有两个主要的组成,一个是识别AMF的5G-GUTI,另一个是在AMF中唯一识别UE的5G-GUTI。<5G-GUTI>=
<5G-TMSI>,where==<5G-S-TMSI>=<5G-TMSI>UE端网络端状态如上饶-e迂,[CtJFKgD-1exxTEiciipion3adllie-Jwnalf¥1tMkmsncmifii■LEglLzrttdequo二ml-N-ai-mjhia.rej-t^'fcdl>a*—&,•7、-5Rlt«sd[HE.■立«.■"),IWkud-wa国画。工-CuuutmjilkeLu电信1虱-Limak-yaJHW>BiU«dUEm£i^iaDt疆jmueJid-D.f丘山口口1K23.502定义了注册流程的步骤如下:UE(R)ANNewAMF1.RegistrationRequestOldAMFPCFSMFAUSFUDM2.AMFseSection3.RegistrationRequest4NamfComrnunicationUEContextTransfer5Namf_Communication_UEContextTransferresponse.IdentityRequest7.IdentityResponse—18.AUSFselectiona-a—Ml9.Authentication/Security10.NamfCommunicationRegistrationCompleteNotJ1.IdeQti[y_Regues]/ResponseEIRfy12.N5g-eir_EcuipmentIdentit:yCheck_Get;13.UDM1selection114a.Nudm_UECM_Registra,ion14b.NudmSDMGet14c.NudmSDMSubscribe・-aw■;15.PCFsLselection18.14d.NudmUECMDeregistrationNotify14e.NudmSDMUnsubscribe16.AMPolicyAssociationEstablishment/Modification19..21.RegistrationAccept17.Nsmf_PDLNsmfPDUSession_UpdateSMContext/SessionReleaseSMContN2AMFMobili.N2AMFMobil-■=!19b21b.UEPolicnComplete22.Registratio23.24.详细解释可以去看23.5024.2.2.2extN3IWFityRequetyRespo19a.NudmUECM_Registration-——--kNudm_UECM_DeregistrationNotify19c.NudryAssociationnSDMUnsubscribeEstablishmentNudmSDMInfoNudmUECMUpdate