A control method for controlling base station apparatuses used in a communication system comprising a first base station apparatus, a second base station apparatus, and one or more mobile station apparatuses (30, 31), comprising: determining at said first base station apparatus whether or not a first condition relating to the number of said mobile station apparatuses (30, 31) positioned in the overlapping area of the cover area of said first base station apparatus and the cover area of said second base station apparatus and to respective output power of said mobile station apparatuses (30, 31) is satisfied; transmitting an instruction signal to said second base station apparatus when said first condition is satisfied; outputting radio signal from said second base station apparatus if said second base station apparatus receives said instruction signal; determining at said second base station apparatus whether or not a second condition relating to the number of said mobile station apparatuses (30, 31) positioned in the overlapping area of the cover area of said first base station apparatus and the cover area of said second base station apparatus and to respective output power of said mobile station apparatuses (30, 31) is satisfied; the control method being characterized in that it further comprises: stopping output of radio signal from said second base station apparatus if said second condition is satisfied and said instruction signal is not received, and in that said first condition is satisfied if the number of said mobile station apparatuses (30, 31) that output signal at an output intensity exceeds a threshold, or said first condition is satisfied if, for plural output powers not less than a first threshold, total sum of the number of said mobile station apparatuses (30, 31) outputting signal at each output power value multiplied by respective output power value exceeds a second threshold. determining at said first base station apparatus whether or not a first condition relating to the number of said mobile station apparatuses (30, 31) positioned in the overlapping area of the cover area of said first base station apparatus and the cover area of said second base station apparatus and to respective output power of said mobile station apparatuses (30, 31) is satisfied; transmitting an instruction signal to said second base station apparatus when said first condition is satisfied; outputting radio signal from said second base station apparatus if said second base station apparatus receives said instruction signal; determining at said second base station apparatus whether or not a second condition relating to the number of said mobile station apparatuses (30, 31) positioned in the overlapping area of the cover area of said first base station apparatus and the cover area of said second base station apparatus and to respective output power of said mobile station apparatuses (30, 31) is satisfied; the control method being characterized in that it further comprises: stopping output of radio signal from said second base station apparatus if said second condition is satisfied and said instruction signal is not received, and in that said first condition is satisfied if the number of said mobile station apparatuses (30, 31) that output signal at an output intensity exceeds a threshold, or said first condition is satisfied if, for plural output powers not less than a first threshold, total sum of the number of said mobile station apparatuses (30, 31) outputting signal at each output power value multiplied by respective output power value exceeds a second threshold. stopping output of radio signal from said second base station apparatus if said second condition is satisfied and said instruction signal is not received, and in that said first condition is satisfied if the number of said mobile station apparatuses (30, 31) that output signal at an output intensity exceeds a threshold, or said first condition is satisfied if, for plural output powers not less than a first threshold, total sum of the number of said mobile station apparatuses (30, 31) outputting signal at each output power value multiplied by respective output power value exceeds a second threshold.