Patent ID: 8184592

Claim:
A method for searching for a crossover router in a mobile network having a mobile node, a correspondent node communicating with the mobile node through a specified network, a first access router enabling the mobile node to access the specified network, a second access router accepting the mobile node after being handed over from the first access router, and a crossover router for establishing a new path through the second access router, comprising: an adjacent router positioned in a direction of the correspondent node on the new path, receiving a message including session information, and comparing the session ID of the session information included in the received message with a currently reserved session ID; comparing an interface identifier of an interface through which the message is received with an interface identifier of a pre-stored interface if the session ID and the reserved session ID are identical; and recognizing the adjacent router as the crossover router when it is confirmed from the received message that a handover of the mobile node occurs, if the interface identifier of the pre-stored interface and the interface identifier of the interface are not identical.