Patent ID: 8005093

Claim:
An apparatus, comprising: a processor configured to determine, based on a mapping table, a destination address of a mobile node for a data packet received from a receiver according to a first protocol or a second protocol, wherein the mobile node is configured to communicate according to the first and the second protocols, initiate routing of the received data packet in accordance with the determined destination address via a transmitter, receive, from the receiver, communications from the mobile node to register addresses of the mobile node according to one or more of the first protocol and the second protocol, and modify the mapping table in accordance with the received communications, wherein the processor is configured to enable the mobile node to communicate with a correspondent node in a network using the first protocol when the mobile node is in a roamed network using the second protocol, wherein the apparatus comprises a network entity located in a home network, the apparatus using the first protocol and supporting the first and second protocols, receive, from the receiver, a data packet according to the first protocol from a node located in the first network, wherein the received data packet includes a data packet of the second protocol indicating a destination address in a second network, and initiate routing of the data packet of the second protocol to the indicated destination address in accordance with the second protocol via the transmitter.