5.15 Signalling based Trace (De)Activation

29.2443GPPInterface between the Control Plane and the User Plane nodesRelease 17TS

The UP function shall set the TRACE feature flag in the UP Function Features IE if it supports Trace (see 3GPP TS 32.422 [35]).

If the UP function indicated support of Trace, the CP function may activate a trace session during a PFCP session establishment or a PFCP session modification procedure, by including the Trace Information IE in the PFCP Session Establishment Request or PFCP Session Modification Request.

The CP function may deactivate an on-going trace session by including the Trace Information IE with a null length in a PFCP Session Modification Request.

There shall be at most one trace session activated per PFCP session at a time.