COMMUNICATION HANDOVER METHOD, COMMUNICATION MESSAGE PROCESSING METHOD, PROGRAM FOR CAUSING COMPUTER TO EXECUTE THESE METHODS, AND COMMUNICATION SYSTEM

摘要

Disclosed is a technique which enables a mobile node to promptly and continuously get an additional service (e.g., QoS guarantee) before and after the handover. According to the technique, a mobile terminal (MN 10) determines execution of a handover between subnets based on a predetermined condition, configures an NCoA, and acquires information on an adjoining mQNE (a node capable of changing a QoS path) 41 on the QoS path of the MN 10. The MN sends an FBU message and adjacent mQNE information to an oAR 21. The oAR forwards the adjacent mQNE information received from the MN, together with an HI message, to an nAR 31, which establishes a (C)QoS path with the mQNE for the MN based on the adjacent mQNE information.