1 Scope

29.5913GPP5G SystemNetwork Exposure Function Southbound ServicesRelease 17Stage 3TS

The present document specifies the stage 3 protocol and data model for the Nnef southbound Service Based Interface. It provides stage 3 protocol definitions and message flows, and specifies the API for each service offered by the Network Exposure Function (NEF).

The 5G System stage 2 architecture and procedures are specified in 3GPP TS 23.501 [2], 3GPP TS 23.502 [3] and 3GPP TS 23.288 [14].

The Technical Realization of the Service Based Architecture and the Principles and Guidelines for Services Definition are specified in 3GPP TS 29.500 [4] and 3GPP TS 29.501 [5].