School of Specs 23.501v20.2.0

3GPP 23.501 v20.2.0 — the document's own text

4.2.16 Architecture to support User Plane Information Exposure via a service-based interface

Taught in 3. The shape of the 5G core (The 5G system architecture, in depth).

As depicted in Figure 4.2.16-1, the 5G System architecture allows user plane information exposure to some NFs via service-based interface in UPF.

Figure 4.2.16-1: Architecture to support User Plane Information Exposure via a service-based interface
Figure 4.2.16-1: Architecture to support User Plane Information Exposure via a service-based interface

NOTE 1: In this Release of the specification, only NWDAF/DCCF/MFAF, NEF/AF, SMF and TSNAF/TSCTSF are considered as the receiver of the UPF event notifications.

NOTE 2: UPF information exposure is not restricted to SBI interface, i.e. reporting via PFCP over N4 to SMF is still applicable.

Not all events can be subscribed to UPF directly. The details and constraints for the subscription to UPF event exposure service (i.e. direct vs. indirect) and the information exposed to certain NFs by UPF, as well as the information contained in the event notifications, are defined in clause 5.2.26.2 of TS 23.502 [3] and clause 5.8.2.17.