MOBILE COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a mobile data communication system capable of reducing packet loss by shortening the interruption time of communication even in the cases that a terminal moves fast or and that a base station is handed off in a mobile network, and to provide a HA device, advertising routers, base stations, routers and mobile terminal devices included in the system. SOLUTION: Each base station advertises an address having '1' set in a different bit of an interface ID of a routing address. When a mobile terminal has received radio waves from a plurality of the base stations in the vicinity of a boundary between cells, the mobile terminal combines a plurality of received routing addresses by logical summation and registers a resultant routing address with the HA device. As for a packet delivered from the HA device to the routing address and having '1' in a plurality of bits of the Interface ID, a router resolves the address of the host section into destination addresses each having '1' in one bit, generates packets each having one of resultant addresses, and transmits the generated packets.