Patent ID: 7551632

Claim:
An IPv6 mobile router comprising: a first resource configured for 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 a public IPv4 gateway address for the IPv6 gateway; a second resource configured for generating an IPv6 header for an IPv6 packet, the IPv6 header having a source address field that specifies the IPv6 tag address, and a reverse routing header that specifies a home address; a third resource configured for encapsulating the IPv6 packet in an IPv4 packet having an IPv4 header including a destination address field that specifies the public gateway IPv4 address, and a source address field specifying a mobile router IPv4 address, the mobile router IPv4 address used by the IPv6 mobile router for accessing the IPv6 gateway via the IPv4 network; and a fourth resource configured for outputting the IPv4 packet to the IPv6 gateway via the IPv4 network, for transfer of the IPv6 packet onto the IPv6 network.