Patent ID: 7440429

Claim:
A method for re-establishing context of data packet flow between terminals through at least a network comprising a number of routers for routing data packet flows between the routers along data packet flow paths connecting said terminals, of which terminals at least one is mobile and may change access between different access points of said at least a network, wherein an access point comprises an access router and a middlebox, which is controlled and supported by an associated Midcom Agent, characterized by the steps of: receiving from a mobile terminal, one message indicating a change from one current access point, to which the mobile terminal is connected, to a selected access point, to which said terminal will perform an handover; sending a request comprising a copy of stored context in the Midcom Agent for said data packet flow to the middlebox of said current access point; analysing in the middlebox of said current access point whether the sent context is equal to the context stored in said middlebox, or not; updating the stored context in the Midcom Agent to a valid context in accordance to received context in a response (Context Transfer Data response) message from said middlebox of said current access point; distributing said valid context to at least the middlebox of said selected access point.