<p>The disclosed control device (100) is equipped with: a retaining unit (500) that is configured in a manner so as to retain a communication disconnection cell; a selection unit (700) that is configured in a manner so that, when it is determined that predetermined conditions are being met, the priority level of the communication disconnection cell is lowered below the priority level of another frequency cell, and a communication frequency cell wherein a target mobile station (900) should perform communication is selected; and a notification unit (300) that is configured in a manner so as to notify the target mobile station (900) of the communication frequency cell selected by means of the selection unit (700). The retaining unit (500) is configured in a manner so as to retain the communication frequency cell as a communication disconnection cell when a control signal from the target mobile station (900) is not received via the communication frequency cell notified by the notification unit (300) within a predetermined timeframe.</p>
