Patent ID: 7483712

Claim:
A method for controlling downlink transmission power of a base station in a mobile communication system wherein downlink radio signals are transmitted from the base station to a mobile station via a downlink, comprising: receiving the downlink radio signals and uplink radio signals via, respectively, the downlink or an uplink; estimating a present state of a downlink transmission path from the received downlink radio signals; recognizing a present position of the mobile station from one of the received downlink or uplink radio signals; recognizing a present rate of movement of the mobile station from one of the received downlink or uplink radio signals; predicting a future position of the mobile station based on the recognized present position and present rate of movement of the mobile station; obtaining a future state of a downlink transmission path based on the predicted future position; and controlling the downlink transmission power of the base station based at least on the predicted future downlink transmission path state and the estimated present state of the downlink transmission path.