Subscription-Based Event Notification Techniques for Reducing Data Buffering in Mobile Networks

A network exposure function (NEF) entity configured to:

• receive, from an application server, an event subscription request which includes a list of one or more subscribed events associated with a UE, the one or more subscribed events including at least one of a UE attach event and a UE detach event;
• create a context associated with the one or more subscribed events;
• receive an indication of an occurrence of an event comprising one of a UE attach or a UE detach;
• and
• send, to the application server, an event notification indicating the occurrence of the event associated with the UE.

A method comprising:

• receiving, from an application server for IP data delivery to a user equipment (UE), an event subscription request which includes a list of one or more subscribed events associated with the UE, the one or more subscribed events including at least one of a UE attach event and a UE detach event;
• creating a context associated with the one or more subscribed events;
• receiving, from a policy and charging rules function (PCRF) entity, an indication of an occurrence of an event associated with the UE, the event comprising one of a UE attach or a UE detach;
• and
• sending, to the application server, an event notification indicating the occurrence of the event associated with the UE.