Patent ID: 7539164

Claim:
A method, comprising: registering binding updates when a mobile node changes location in a mobile internet protocol access network; and performing an internet protocol local mobility management operation where a proxy function is not visible to the mobile node by having a proxy function in a cellular access point encapsulate a binding update message from the mobile node, and being responsible for protocol signalling, and by using a care of address generated based on a prefix of a mobile agent prefix and a locally unique identifier of the mobile node in a binding update message, said encapsulation of said binding update message comprising changing at least one of the source address of the message to an access router address and the destination address of the message to a mobile agent's address, and wherein the mobile node mobility inside a local mobility domain is hidden from a home agent and a correspondent node both of said home agent and said correspondent node being separate from the cellular access point and being connected to the internet.