Deactivation of the User Plane Connection of a PDU Session

This procedure is used to release the logical NG-AP signaling connection and the associated N3 user plane connections, and (R)AN RRC signaling and resources.

The following reasons may trigger the initiation of AN release:

  • (R)AN-initiated with cause. For example, O&M Intervention, unspecified failure. (R)AN (For example, Radio) link failure, user inactivity, inter-system redirection, request for establishment of QoS flow for IMS voice, release due to UE generated signaling connection release, mobility restriction and so on.

  • AMF-initiated with cause. For example, unspecified failure.