3GPP 23.501 v20.2.0 — the document's own text
5.21.1.1 TNL associations
Taught in 27. Overload, energy, deployment and the rest (The 5G system architecture, in depth).
5G-AN node shall have the capability to support multiple TNL associations per AMF, i.e. AMF name.
An AMF shall provide the 5G-AN node with the weight factors for each TNL association of the AMF.
The AMF shall be able to request the 5G-AN node to add or remove TNL associations to the AMF.
The AMF shall be able to indicate to the 5G-AN node the set of TNL associations used for UE-associated signalling and the set of TNL associations used for non-UE associated signalling.
NOTE: The TNL association(s) indicated for UE-associated and non-UE associated signalling can either be overlap or be different.