Patent ID: 8910271
Filing Date: 2014-12-09
Classification: H04L,H04W

Abstract:
1. A method for supporting handover of a User Equipment (UE) from a mobile communication network to a wireless Local Area Network (LAN) in an interworking network including the mobile communication network and the wireless LAN, the method comprising the steps of: transmitting, by the UE, a handover request message to an authentication server through the mobile communication network when the UE connected to the mobile communication network is determined to perform handover to the wireless LAN; receiving, by the UE, a handover command message including an Internet Protocol (IP) address newly assigned to the UE by the authentication server and an IP address of a gateway of the wireless LAN; performing, by the UE, authentication with the authentication server through the wireless LAN using the IP address of the gateway and establishing an IP security tunnel with the wireless LAN by using an active key of the mobile communication network or by performing Mobile Internet Protocol (MIP) registration; receiving, by the UE, packets buffered in the mobile communication network from the wireless LAN through a tunnel established between the mobile communication network and the wireless LAN; transmitting, by the UE, a handover complete message to the mobile communication network through the wireless LAN; and receiving, by the UE, packets from the wireless LAN.