Network-Requested PDU Session Modification Call Flow

This section describes the call flow of the network-requested PDU session modification.

Network-Requested PDU Session Modification Call Flow


Network-Requested PDU Session Modification Call Flow Description
Step Description
1

The SMF decides to trigger a PDU Session Modification due to PCF, UDM, or RAN initiated procedures.

2

The SMF checks the DNN profile to determine whether the “always-on” support is enabled.

3

The SMF determines whether the current DNN configuration for “always-on” is different from the last indication sent to UE. If it differs, the SMF includes an ‘Always-on PDU Session Indication’ IE in the PDU Session Modification Command message.