name: TSNAF
full_form: Traffic Steering Network 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 Traffic Steering Network Analytics Function (TSNAF) is a network function within the 5G system architecture that receives user plane information exposure via service-based interfaces in the User Plane Function (UPF). It is one of the designated receivers of UPF event notifications, alongside NWDAF/DCCF/MFAF and NEF/AF. The TSNAF plays a role in analyzing network traffic and steering it accordingly, contributing to efficient network operations and management.
explanation: TSNAF is classified as a Network Function because it is explicitly mentioned as one of the NFs that receive user plane information exposure from UPF via service-based interfaces, indicating its involvement in network analytics and traffic steering within the 5G system architecture.
section_title: 4.2.16 Architecture to support User Plane Information Exposure via a service-based interface
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