3GPP 24.501 v20.0.0 — the document's own text

6.2.20 Support of UL PDU set based handling

Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).

If the network supports PDU set based handling (see clause 5.37.5 of 3GPP TS 23.501 [8]), based on operator policy, the SMF may provide the protocol description for UL PDU set based handling in the PDU SESSION ESTABLISHMENT ACCEPT message or the PDU SESSION MODIFICATION COMMAND message to the UE. The UE can store the protocol description and may use it to identify PDUs belong to PDU sets for the uplink direction.

NOTE 1: Whether and how to use the protocol description to identify PDUs belonging to a PDU set in the uplink direction, is up to UE implementation. The use of protocol description does not impact UL user data packet matching in the UE.

NOTE 2: Whether and how to process PDUs belonging to a PDU set in the uplink direction, is up to UE implementation.

NOTE 3: In this release of the specification, UL PDU set based handling is also supported for non-3GPP access as specified in 3GPP TS 23.501 [8] and 3GPP TS 23.316 [6D].