name: NFs
full_form: Network Functions
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: A Network Function Group refers to a collective set of interconnected network functions that work together to deliver specific telecommunications capabilities. In the context of user plane information exposure via a service-based interface, certain NFs (Network Functions) such as NWDAF/DCCF/MFAF, NEF/AF, and TSNAF/TSCTSF are considered as receivers of UPF event notifications. These network functions play critical roles in managing various aspects of mobile communication networks.
explanation: NFs is classified under the category NetworkFunction_Group because it represents a group of interconnected network functions working together to deliver specific telecommunications capabilities, aligning with the context provided from 3GPP TS 23.501.
section_title: 4.2.16 Architecture to support User Plane Information Exposure via a service-based interface
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