Enhancement for event monitoring exposure

A method performed by a second network function implementing network exposure function, comprising:

• receiving, from a first network function implementing application function, a first subscription message comprising at least one of Data Network Name (DNN) of a data network and Single Network Slice Selection Assistance Information (S-NSSAI), for monitoring an event status for a User Equipment (UE) or a group of UEs;
• determining a third network function implementing session management function or a fourth network function implementing unified data management function;
• and
• transmitting, to the determined network function, a second subscription message comprising at least one of the DNN and S-NSSAI.

A first network function implementing application function, comprising:

• at least one processor;
• and
• a non-transitory computer readable medium coupled to the at least one processor, the non-transitory computer readable medium contains instructions executable by the at least one processor, whereby the at least one processor is configured to perform the following steps:
• transmitting, to a second network function implementing network exposure function, a first subscription message comprising at least one of Data Network Name (DNN) of a data network and Single Network Slice Selection Assistance Information (S-NSSAI), for monitoring an event status for a User Equipment (UE) or a group of UEs;
• and
• receiving, from the second network function, a first notification message comprising information indicating the event status.