Patent ID: 7702334

Claim:
A method of controlling hand-over to change connections between a radio communication terminal and a plurality of radio communication base stations for radio communication, the method comprising the steps of: (a) when the radio communication terminal executes a first hand-over operation, on the basis of the qualities of signals received from the radio communication base stations, to finish connections between the radio communication terminal and at least part of the radio communication base stations for radio communication, storing identifiers of radio communication base station(s), with which the radio communication terminal finished radio communication, and information about the qualities of signals received from said radio communication base station(s) when the radio communication terminal finished radio communication with said radio communication base station(s); (b) when the radio communication terminal executes a second hand-over operation, on the basis of the qualities of signals received from the radio communication base stations, to start communication between the radio communication terminal and at least part of the radio communication base stations for radio communication, determining whether or not a particular radio communication base station with which the radio communication terminal is about to start communicating, was previously put in radio communication with the radio communication terminal, based on the presence or absence of the identifier of the particular radio communication base station; (c) if the radio communication terminal has determined at step (b) that the particular radio communication base station was previously put in radio communication with the radio communication terminal, comparing the quality of a first signal currently received from the particular radio communication base station with the quality of a second signal received from the particular radio communication base station stored at step (a) when the radio communication terminal finished the radio communication with the particular radio communication base station; and (d) if the quality of the first signal is higher than the quality of the second signal by a predetermined level or more, notifying the particular radio communication base station that the particular communication base station satisfies handover conditions and if the quality of the first signal is not higher than the quality of the second signal by a predetermined level stopping the handover process for the particular radio communication base station.