Patent ID: 6865184
Filing Date: 2005-03-08
Classification: H04L,H04W

Abstract:
1. A method in an IPv6 mobile node, the method including: first generating an IPv6 tag address that includes a prescribed protocol identifier for an IPv6 gateway configured for transferring packets between an IPv4 network and an IPv6 network, and an IPv4 gateway address for the IPv6 gateway; second generating an IPv6 packet having a source address field that specifies the IPv6 tag address, and a header that specifies a home address assigned to the IPv6 mobile node; encapsulating the IPv6 packet in an IPv4 packet having an IPv4 header including a destination address field that specifies the IPv4 gateway address, a source address field specifying a mobile node IPv4 address for the IPv6 mobile node, and a transport header having a source port field specifying a prescribed UDP port for the IPv6 mobile node, and a destination port field specifying a prescribed UDP port for the IPv6 gateway used for identifying transfer of the IPv6 packet between the IPv4 network and the IPv6 network; and outputting the IPv4 packet to the IPv6 gateway via the IPv4 network, for transfer of the IPv6 packet onto the IPv6 network.