Patent ID: 8229447

Claim:
An uplink transmit power control method for use in a mobile communication system in which a modulation and coding scheme is selected in accordance with reception quality information that a communication terminal unit as a mobile station unit periodically reports to a base station unit, the method comprising: a first base station unit detecting an interference level and terminal identification information identifying a communication terminal unit that is causing interference greater than a predetermined reference value to said first base station unit; said first base station unit transmitting, to said communication terminal unit, control information indicating said interference level and also indicating that said communication terminal unit is causing interference; said communication terminal unit receiving said control information; said communication terminal unit reducing transmit power in accordance with said interference level indicated by said control information, and adjusting reception quality information in such a direction as to reduce quality; and said first base station unit transmitting to all neighboring base stations notification information notifying that said control information has been transmitted to said communication terminal unit.