5G • Core Network
N33 Interface
N33 Reference Point (NEF to AF)
Reference point between Network Exposure Function and external Application Functions.
Technical Explanation
N33 is the external-facing API gateway of the 5G Core. Realized via RESTful HTTPS APIs, it allows enterprise applications to request QoS reservations, query device location, influence traffic routing to local MEC servers, and subscribe to network event webhooks.
Key Functions
- Exposes standardized 3GPP REST APIs to external enterprise applications
- Enables Application Functions to control traffic routing to edge servers
- Protects 5GC internal topology via security abstraction and token auth
Specifications
3GPP TS 23.501, TS 29.522
Interfaces
N33Nnef
Related 5G Concepts
Want to memorize 5G concepts like this one?
Study it with SuperMemo SM-2 spaced repetition flashcards.