Patent ID: 7778260

Claim:
A mobility communications system including: a first IP-based point-of-presence network; a second IP-based point of presence network; and a roaming mobile proxy device that substantially seamlessly roams between at least said first IP-based point-of-presence network and said second IP-based point-of-presence network, the roaming mobile proxy device comprising: a first networking mechanism that enables said mobile proxy device to provide and support a local mobile network so that said mobile proxy device provides network connectivity for at least one node that communicates with an ultimate peer not attached to the local mobile network by communicating with said ultimate peer through said local mobile network and said mobile proxy device; and a second networking mechanism that enables said mobile proxy device to exchange application data between said at least one node attached to said local mobile network and said ultimate peer(s) that is remote to said mobile proxy device and is not attached to the local mobile network while said mobile proxy device substantially seamlessly roams between said first and second IP-based point-of-presence networks, wherein said roamable mobile proxy device allows said at least one node to persistently maintains application sessions through changes in network point of presence.