a method for reducing interferences between base stations in a communication system having a plurality of base stations . this method comprises the steps of : causing a user station to receive both a signal transmitted by a local - cell base station and a signal transmitted by an adjacent - cell base station , thereby measuring the snr of the interfered link and the snr of the leak link of the adjacent - cell base station ; calculating a weighting factor of a leak power based on the measured snr of the interfered link and the measured snr of the leak link of the adjacent - cell base station ; and determining , based on the calculated weighting factor , whether or not the leak power has to be suppressed and to what degree such suppression has to be performed .