This TS specifies the discovery and network selection procedures for access to 3GPP Evolved Packet
Core (EPC) via non-3GPP access networks and includes Authentication and Access Authorization using
Authentication, Authorization and Accounting (AAA) procedures used for the interworking of the 3GPP EPC and the
non-3GPP access networks.
This TS also specifies the Tunnel management procedures used for establishing an end-to-end tunnel
from the UE to the ePDG to the point of obtaining IP connectivity and includes the selection of the IP mobility mode.
The non-3GPP access networks considered in this present document are cdma2000 HRPD and Worldwide
Interoperability for Microwave Access (WiMAX), and any access technologies covered in TS 23.402
non-3GPP access networks can be trusted or untrusted access networks.
This TS is applicable to the UE and the network. In this technical specification the network is the 3GPP EPC.