scope:

The present document specifies non-3GPP access network discovery and selection procedures, the access authorization procedure used for accessing non-3GPP access networks. These non-3GPP access networks can be trusted non-3GPP access networks, untrusted non-3GPP access networks or wireline access networks.

The present document also specifies the security association management procedures used for establishing IKEv2 and IPsec security associations:

- between the UE and the N3IWF and the procedures for transporting messages between the UE and the N3IWF over the non-3GPP access networks; and

- between the UE and the TNGF and the procedures for transporting messages between the UE and the TNGF over the non-3GPP access networks.

The present document also specifies the EAP-5G procedures used for exchange of NAS messages via trusted non-3GPP access before the UE is authenticated and authorized to use the trusted non-3GPP access.

The present document is applicable to the UE, the 5G-RG, the W-AGF acting on behalf of the FN-RG or the W-AGF acting on behalf of the N5GC device and the network. In this technical specification the network refers to the 3GPP 5GCN and the trusted non-3GPP access, untrusted non-3GPP access, or wireline access network.

NOTE: The present document is not applicable to the FN-RG.