8.1A N4mb Failure and Restart Detection

23.5273GPP5G SystemRelease 18Restoration proceduresTS

Across PFCP based interfaces, an MB-SMF and MB-UPF shall utilize the PFCP Heartbeat Request and Heartbeat Response messages to detect a peer PFCP entity failure or restart as described in clause 19A of 3GPP TS 23.007 [2].

A PFCP function shall ignore the Recovery Timestamp received in PFCP Association Setup Request and PFCP Association Setup Response messages (see clause 6.2.6 of 3GPP TS 29.244 [4]).