Section: 5.5.2.2.7 Abnormal cases in the network side
Content: The following abnormal cases can be identified: a) De-registration request received in a cell belonging to an SNPN with a non-globally-unique SNPN identity for which the UE has no valid subscription If the UE initiates a de-registration procedure in a cell belonging to an SNPN with a non-globally-unique SNPN identity for which the UE has no valid subscription, and the de-registration procedure is not due to "switch off", the network shall initiate the de-registration procedure. The AMF shall send a DEREGISTRATION REQUEST message including the 5GMM cause #74 "Temporarily not authorized for this SNPN". b) De-registration request received in a cell belonging to an SNPN with a globally-unique SNPN identity for which the UE has no valid subscription If the UE initiates a de-registration procedure in a cell belonging to an SNPN with a globally-unique SNPN identity for which the UE has no valid subscription, and the de-registration procedure is not due to "switch off", the network shall initiate the de-registration procedure. The AMF shall send a DEREGISTRATION REQUEST message including the 5GMM cause #75 "Permanently not authorized for this SNPN". c) De-registration request received in a CAG cell and none of the CAG ID broadcasted by the CAG cell is authorized based on the UE's "allowed CAG list" for the current PLMN If the UE initiates a de-registration procedure in a CAG cell and none of the CAG ID broadcasted by the CAG cell is authorized based on the UE's "allowed CAG list" for the current PLMN and the de-registration procedure is not due to "switch off", the AMF shall initiate the de-registration procedure. The AMF shall send a DEREGISTRATION REQUEST message including the 5GMM cause #76 "Not authorized for this CAG or authorized for CAG cells only" if the UE supports CAG. Otherwise, the network shall operate as described in bullet g) of subclause 5.5.2.3.5. d) De-registration request received in a non-CAG cell from a UE whose "CAG information list" includes an entry associated with the current PLMN, where the entry contains an "indication that the UE is only allowed to access 5GS via CAG cells" If the UE initiates a de-registration procedure in a non-CAG cell from a UE whose "CAG information list" includes an entry associated with the current PLMN, where the entry contains an "indication that the UE is only allowed to access 5GS via CAG cells" and the de-registration procedure is not due to "switch off", the AMF shall initiate the de-registration procedure. The AMF shall send a DEREGISTRATION REQUEST message including the 5GMM cause #76 "Not authorized for this CAG or authorized for CAG cells only" if the UE supports CAG. Otherwise, the network shall operate as described in bullet g) of subclause 5.5.2.3.5. e) De-registration and registration procedure for initial registration collision If the network receives a REGISTRATION REQUEST message indicating either "initial registration" or "emergency registration" in the 5GS registration type IE from the UE before the UE-initiated de-registration procedure, which is not due to switch off, has been completed, the network shall abort the de-registration procedure and the registration procedure shall be progressed.