Patent ID: 8797996
Filing Date: 2014-08-05
Classification: H04W

Abstract:
1. An inter-network packet transmission method comprising: performing a handover from a second network to a first network; tunneling between a user equipment and a first gateway of the first network based on an address of the first gateway; tunneling between the first gateway of the first network and a second gateway of the second network through an interface; transmitting a routing table update request message from the first gateway to the second gateway through the tunnel between the gateways, the routing table update request message being for requesting the second gateway to update its routing table with the address of the first gateway; updating a routing table of the second gateway using the address of the first gateway in response to the routing table update request message; forwarding packets for the user equipment from the second gateway to the first gateway through the tunnel between the gateways based on the updated routing table of the second gateway; forwarding the packets received from the second gateway to the user equipment; and releasing, at the user equipment, a data communication session with the second gateway, when packet forwarding is successful, wherein the first gateway is a Packet Data Gateway of a wireless local area network, and wherein the second gateway is a Gateway GPRS Support Node of a cellular network.