A method of detecting a hole area to be generated in a cover area of a communication system which includes a plurality of base station apparatuses and mobile station apparatuses, includes: measuring received powers from the plurality of base station apparatuses at the mobile station apparatuses, and, based on the received power from the other base station apparatus among a plurality of base station apparatuses other than the base station apparatus which covers a cell in which the mobile station apparatuses are positioned, detecting a hole area to be generated when a signal output from the base station apparatus is stopped.