5.49.6.2 Control of UE access to an MWAB serving PNI-NPN

According to operator's policy, access control may be applied to UE access to MWAB-gNB cell supporting a PNI-NPN.

If the MWAB-gNB is serving a PNI-NPN, the CAG mechanism defined in clause 5.30.3 can be used for managing UE's access to the MWAB-gNB cell, with the following additional considerations:

• The MWAB-gNB is configured either during the communication with the OAM of MWAB-gNB or (pre-)configuration mechanism, with one or more CAG identifiers which are unique within the scope of this PLMN.
• If the MWAB-gNB is (pre-)configured with the PLMN list supporting PNI-NPN, the corresponding CAG Identifiers per PLMN is also configured in the MWAB.
• The MWAB-gNB performs UE access control based on the CAG identifier associated with the MWAB-gNB cell, as defined in clause 5.30.3.4. The MWAB-gNB takes the role of the NG-RAN.

NOTE: In the case of UE not supporting CAG functionality, the MWAB-gNB and 5GC of MWAB Broadcasted PLMN can use other existing mechanisms e.g. forbidden Tracking Area, to manage UE's access to a MWAB-gNB cell.

• Time validity information may be provided to the UE together with the CAG Identifier(s) of the MWAB-gNB(s) that the UE can access. If the evaluation of the time validity information of an entry in the Allowed CAG list changes, the updated Allowed CAG list will be provided to UE and MWAB-gNB by the AMF for enforcement, to make sure that UE not accessing the corresponding MWAB-gNB cell outside of the time duration.

Dedicated CAG ID(s) can be used for the control of UE access to a PNI-NPN via MWAB cells.