N4 Association Update Procedure Call Flow
The N4 Association Update procedure modifies an existing N4 association between the SMF and the UPF. It can be initiated either by the UPF or by the SMF to update the supported features or available UPF resources.
The following call flow depicts the SMF-initiated N4 Association Update procedure:
The following call flow depicts the UPF-initiated N4 Association Update procedure: