Patent ID: 8843138

Claim:
A method for controlling transmission power in a serving femto base station, wherein the method is performed by the serving femto station, the method comprising: predicting femto base station interference to be given from an adjacent femto base station to a terminal; predicting macro base station interference to be given from a macro base station to the terminal; determining transmission power for the terminal; and transmitting a downlink signal to the terminal on the basis of the transmission power, wherein the femto base station interference is predicted on the basis of a distance between the serving femto base station and the adjacent femto base station and the transmission power of the adjacent femto base station, and the macro base station interference is predicted on the basis of a distance between the serving femto base station and the macro base station and the transmission power of the macro base station, wherein, if a plurality of terminals are serviced by the serving femto base station, the transmission power is determined to be increased as the femto base station interference and the macro base station interference increase, and the transmission power is determined to be decreased as a minimum value of receiving power fed back from the plurality of terminals increases.