NG‐RAN Network – Functional Architecture

Abstract

The 5G‐standalone access architecture requires the deployment of a 5G core network connected to the next‐generation radio access network (NG‐RAN). The NG‐RAN provides both NR and LTE radio access. The NG‐RAN provides both an LTE radio interface and a 5G‐NR radio interface. The NG‐RAN node is responsible for managing radio resources, controlling the radio bearer establishment of the user plane and managing mobility during the session. The NG‐RAN node performs compression and encryption of traffic data on the radio interface. The mobile and the AMF exchange data using the non‐access stratum protocol. The AMF manages the addition and removal of the transport network layer association with the entities of the NG‐RAN node. The AMF is in charge of managing the 5G core network and services. The security architecture implemented on the 5G mobile is based on mutual authentication between the 5G core network core network and mobile.