MOBILE NODE

A mobile node (10) for performing a high quality handover processing that causes no communication interruption time and maintains an excellent communication continuation, has an interface function for connection to networks. A network quality monitor part (12) monitors the network quality on the basis of at least one of a radio band and the intensity of a radio wave received by network devices (11-1 through 11-n). In accordance with the state of the network quality, a handover control part (13) transmits, before an interruption of communication, a cover address to an address-registered destination, and changes communication information paths, thereby performing a handover for switching over to the connection of a new network. Receiving a response indicating that the cover address has been updated by the address-registered destination, a network control part (14) maintains, until the interruption of communication, the function of the reception via the current network.