Downlink Packet Buffering and Data Notification Triggering

A Buffering Action Rule (BAR) provides instructions to control the buffering behavior of the UPF. The BAR controls the buffering behavior for all Forwarding Action Rules (FARs) of the Packet Forwarding Control Protocol (PFCP) session. This control is applicable when the PFCP session is set with an Apply Action parameter, which requests packets to be buffered and associated with the respective BAR.

The Idle Mode Buffering and Paging feature is related to this use case.