A.44 Monitoring of application triggering
28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS
When the AF needs to trigger the UE for some actions, the AF requests the NEF to send an application trigger to the UE.
The application in the UE may perform actions as indicated by the Trigger payload when the Triggered payload is received at the UE. For example initiation of immediate or later communication with the application server based on the information contained in the Trigger payload, which includes the PDU Session Establishment procedure if the related PDU Session is not already established.
Therefore, to ensure the application run normally, the network needs to successfully deliver the application trigger to the UE.