Patent ID: 7218945

Claim:
A transmission power controlling method for limiting a total downlink transmission power for transmission from a base station to subject user terminals to less than or equal to a specified maximum value of a total downlink transmission power in a mobile communication wireless network in which a plurality of wireless base stations execute an adaptive transmission-power control by setting transmit power control bits in a wireless line having multiple-access to user terminals, said method comprising: when a value of the total downlink transmission power approximates to the maximum value, progressively restraining a base station apparatus from increasing a transmission power of a dedicated line to a user terminal relative to a transmission power that would have been required to be increased at a next time slot and in accordance with a restraint that becomes progressively larger as said specified maximum value is approached, wherein an increase in transmission power of a dedicated line to a user terminal, which is required to be increased at a next time slot, is restrained according to a given decreasing function in which a value of total downlink transmission power that is normalized on the basis of the maximum value of total dowulink transmission power falls in a domain thereof and a value of an increase in the transmission power of the dedicated line falls in a range thereof.