5.4.11.8 Support for mobility Forbidden Area and Service Area Restrictions for NR satellite access

Forbidden Area functionality is supported as described in clause 5.3.4.1.1 with the modifications described below:

• The AMF and the UE receive the broadcast TAI (if a single TAI is broadcast) or all broadcast TAIs (if multiple TAIs are broadcast) from the NG-RAN as described clause 5.4.11.7. The AMF considers the UE to be in a Forbidden Area if the only received TAI is forbidden or if all received TAIs are forbidden based on subscription data. The UE considers it is in a Forbidden Area if the only received TAI is forbidden, or if all received TAIs are forbidden and is not within a Forbidden Area in the case that at least one broadcast TAI is not forbidden.
• If AMF receives multiple TAIs from the NG-RAN and determines that some, but not all of them are forbidden by subscription or by operator policy, the AMF shall send the forbidden TAI(s) to the UE as described in clauses 4.2.2.2 and 4.2.3 in TS 23.502 [3]. The UE stores the TAI(s) in the appropriate Forbidden Area list and removes the TAI(s) from Registration Area if present.

Service Area Restrictions functionality is supported as described in clause 5.3.4.1.2 with the modifications described below:

• The AMF receives the broadcast TAI (if a single TAI is broadcast) or all broadcast TAIs (if multiple TAIs are broadcast) from the NG-RAN as described clause 5.4.11.7. The AMF provides the UE with Service Area Restrictions which consist of either Allowed Areas or Non-Allowed Areas, as described in clause 5.3.4.1.2. The UE and AMF consider the UE to be in a Non-Allowed Area if none of the broadcast TAIs is Allowed. The UE and AMF consider the UE to be in an Allowed Area if at least one broadcast TAI is allowed.