The ePDG gives admittance to PS domain administrations to WLAN UEs. It is utilized for the combination of multiple core network functions inside a solitary node. Better execution incorporating a backhaul security through IPSec tunnels, tunnel set-up rates, throughput, and deep packet inspection (DPI). The ePDG upholds secure access interworking between the versatile Packet Core and untrusted, non-3GPP networks.