Section: 4.15.2 External Exposure of Network Capabilities
Content: The Network Exposure Function (NEF) supports external exposure of capabilities of network functions. External exposure can be categorized as Monitoring capability, Provisioning capability, Policy/Charging capability, network status reporting capability, Analytics reporting capability and Member UE selection assistance capability. The Monitoring capability is for monitoring of specific event for UE in 5GS and making such monitoring events information available for external exposure via the NEF. The Provisioning capability is for allowing external party to provision of information which can be used for the UE in 5GS. The Policy/Charging capability is for handling QoS and charging policy for the UE based on the request from external party. The Analytics capability is for allowing external party to acquire analytics information generated by 5G System. The Member UE selection assistance capability enables the NEF to consolidate information collected from other 5GC NFs, which fulfil the Member UE filtering criteria requested by the AF, to derive one or more lists of UE(s) and possibly additional information that assists AF for the selection of candidate members to participate in the application layer operation e.g. federated learning operation in the application layer. The details for the External Exposure of Analytics capabilities as well as interactions between NEF, external party and NWDAF are described in TS 23.288[ Architecture enhancements for 5G System (5GS) to support network data analytics services ]  [50].