Question: In a 5GS network, when the RRC state is RRC_INACTIVE and an RNA Update triggers the resumption of the RRC connection for a non-emergency service, what Access Category will the RRC layer select for the Unified Access Control procedure?
Option 1: Access Category 0 (Normal Priority)
Option 2: Access Category 5 (Medium Priority Services)
Option 3: Access Category determined by NAS based on the access event
Option 4: Access Category 8 (High Priority Services, e.g., MCS)
Explanation: According to the Unified Access Control procedure's applicability in a 5GS network, when the RRC connection resumes from an RRC_INACTIVE state due to an RNA Update for a non-emergency service, the RRC layer specifically selects Access Category 8. This is reserved for high-priority services, such as Mission-Critical Services (MCS), ensuring these critical communications are prioritized appropriately in the access control checks.