name: NWDAF
full_form: Network Data Analytics Function
context: 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 NOTE 1: In this Release of the specification, only NWDAF/DCCF/MFAF, NEF/AF 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[ Procedures for the 5G System (5GS) ]  [3] and clause 5.8.2.17.
description: The Network Data Analytics Function (NWDAF) is a network function in the 5G system architecture that supports user plane information exposure via service-based interfaces. It receives event notifications from the User Plane Function (UPF) and can subscribe to UPF events directly or indirectly, depending on the constraints defined in TS 23.502.
explanation: NWDAF is classified as a Network Function because it plays a crucial role in collecting and analyzing user plane data within the 5G system architecture, enabling other network functions to make informed decisions based on this data.
section_title: 4.2.16 Architecture to support User Plane Information Exposure via a service-based interface
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