Network-Requested PDU Session Modification Call Flow
This section describes the call flow of the network-requested PDU session modification.

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 the "Always-on PDU Session Indication" IE in the PDU Session Modification Command message. |