Section: 6.8.2.2 Key handling during mobility in RRC_INACTIVE state 6.8.2.2.1 General
Content: The purpose of this procedure is to allow the UE to notify the network if it moves out of the configured RNA (RAN-based Notification Area) or if UE initiates a periodic RAN-based notification area update procedure. The UE and gNB store the AS security context in RRC_INACTIVE state and reactivate the AS security context when the UE initiates the RAN-based Notification Area Update (RNAU) procedure. The ng-eNB connected to 5GC shall also support the same key handling during mobility in RRC_INACTIVE.