Patent ID: 8559995

Claim:
A power control apparatus for controlling a power of a mobile station for use in a wireless mobile telecommunication system, the power control apparatus comprising: a telecommunication device configured to perform data telecommunication with the mobile station and receive data arrival acknowledgement information transmitted from the mobile station in a data retransmission layer; a judgment device configured to repeat judging a reception quality of the mobile station by using the received data arrival acknowledgement information and changing a first target power quality which is compared with a power quality measured in the mobile station and a second target power quality which is compared with a power quality measured in a base station based on a judgment result, and to stop changing the first target power quality and the second target power quality when the reception quality is not improved by previous instructions to change the first target power quality and the second target power quality; and a notification device configured to transmit the changed first target power quality to the mobile station, to request the mobile station to change the first target power quality, to transmit the changed second target power quality to the base station, and to request the base station to change the second target power quality, wherein said judgment device calculates a first indicator of said reception quality by using first data arrival acknowledgement information previously received from the mobile station, calculates a second indicator of the reception quality by using second data arrival acknowledgement information presently received from the mobile station and compares a difference between the first and second indicators with a judgment value, thereby judging the reception quality.