Patent ID: 6973326

Claim:
A closed-loop power control method comprising: setting an initial value of a power control variable; detecting a strength of a terminal signal and comparing the detected strength with a reference signal strength; transmitting a power control signal to a terminal according to the comparison result and the set power control variable value; and analyzing the power control signal transmitted to the terminal for a predetermined reference time period and re-setting the power control variable, wherein re-setting the power control variable comprises: increasing a power control step-size and decreasing a transmission period of the power control signal, if a number of times of continuous transmission of the same power control signal is above a maximum number of times of continuous transmission; decreasing a power control step-size and increasing a transmission period of the power control signal, if the number of times of continuous transmission of the same power control signal is below a minimum number of times of continuous transmission; and not re-setting the power control step-size and the power control signal transmission period, if the number of times of continuous transmission of the same power control signal is between the maximum number of time.