附着的业务流程.docx

附着的业务流程一个终端用户需要首先注册到有效的网络上面才能够使用网络业务。这个过程被称为网络附着。对于永久在线的EPS系统中的用户来说，就需要在附着过程中建立一个默认承载。在这个附着过程中UE也可能触发一个或多个的专用承载。附着流程是用户开机后的第一个过程， 是后续所有的流程的基础。NOTE 2: For a PMIP-based S5/S8, procedure steps (A), (B), and (C) are defined in TS 23.402 [2]. Steps 7, 10, 13,14, 15 and 23a/b concern GTP based S5/S8.NOTE 3: The Serving GWs and PDN GWs involved in steps 7 and/or 10 may be different to those in steps 13-15.NOTE 4: The steps in (D) are executed only upon handover from non-3GPP access.NOTE 5: More detail on procedure steps (E) is defined in the procedure steps (B) in clause 5.3.8.3.NOTE 6: More detail on procedure steps (F) is defined in the procedure steps (B) in clause 5.3.8.4.1. The UE initiates the Attach procedure by the transmission, to the eNodeB, of an Attach Request (IMSI or old GUTI, Old GUTI type, last visited TAI (if available), UE Core Network Capability, UE Specific DRXparameters, Attach Type, ESM message container (Request Type, PDN Type, Protocol Configuration Options,Ciphered Options Transfer Flag), KSIASME, NAS sequence number, NAS-MAC, additional GUTI, P-TMSIsignature, Voice domain preference and UEs usage setting, MS Network Capability) message together withRRC parameters indicating the Selected Network and the old GUMMEI. If the UE identifies itself with the oldGUTI, the UE shall set the Old GUTI Type to indicate whether the Old GUTI is a native GUTI or is mappedfrom a P-TMSI and RAI. The old GUTI may be derived from a P-TMSI and RAI. IMSI shall be included if theUE does not have a valid GUTI or a valid P-TMSI available, or if the UE is configured to perform Attach withIMSI at PLMN change and is accessing a new PLMN. The UE stores the TIN in detached state. If the UEs TINindicates GUTI or RAT-related TMSI and the UE holds a valid GUTI then the old GUTI indicates this validGUTI. If the UEs TIN indicates P-TMSI and the UE holds a valid P-TMSI and related RAI then these twoelements are indicated as the old GUTI. Mapping a P-TMSI and RAI to a GUTI is specifie