3GPP 23.501 v20.2.0 — the document's own text

5.26.1 Architecture Principles for Configuration Transfer

Taught in 27. Overload, energy, deployment and the rest (The 5G system architecture, in depth).

Configuration Transfer between two RAN node provides a generic mechanism for the exchange of information between applications belonging to the RAN nodes.

In order to make the information transparent for the Core Network, the information is included in a transparent container that includes source and target RAN node addresses, which allows the Core Network nodes to route the messages. The mechanism is depicted in figure 5.26 1.

Figure 5.26-1: inter NG-RAN Configuration Transfer basic network architecture

The NG-RAN transparent containers are transferred from the source NG-RAN node to the destination NG-RAN node by use of Configuration Transfer messages.

A Configuration Transfer message is used from the NG-RAN node to the AMF over N2 interface, a AMF Configuration Transfer message is used from the AMF to the NG-RAN over N2 interface and a Configuration Transfer Tunnel message is used to tunnel the transparent container from a source AMF to a target AMF over the N14 interface.

Each Configuration Transfer message carrying the transparent container is routed and relayed independently by the core network node(s).