Patent ID: 7965692

Claim:
A method for communication between a first mobile node and a second mobile node in a network implementing Mobile Internet Protocol version 4, the method comprising: assigning, by a first foreign agent, a first Care of Address (CoA) to the first mobile node; communicating, by the first mobile node, with the second mobile node via the first foreign agent and a home agent of the first mobile node; detecting at least one Real-Time Protocol (RTP)/User Datagram Protocol (UDP) data flow from the second mobile node to the first mobile node; installing a binding for the at least one RTP/UDP data flow, the binding comprising a destination address for the at least one RTP/UDP data flow, wherein the destination address is the address of the home agent of the first mobile node; replacing the destination address of each binding with the first CoA assigned to the first mobile node; receiving, by the first mobile node during a first time period, the at least one RTP/UDP data flow from the second mobile node independent of the home agent of the first mobile node; replacing the destination address of each binding with the address of the home agent of the first mobile node; receiving, by the first mobile node during a second time period, the at least one RTP/UDP data flow from the second mobile node through the home agent of the first mobile node; assigning, by a second foreign agent, a second CoA to the first mobile node; replacing the destination address of each binding with the second CoA assigned to the first mobile node; receiving, by the first mobile node during a third time period, the at least one RTP/UDP data flow from the second mobile node independent of the home agent of the first mobile node; wherein the second time period is subsequent to the first time period and the third time period is subsequent to the second time period.