Communication control device, communication control method, and communication control system

A master node of a second wireless communication system which is secondarily operated based on a first frequency channel used by a first wireless communication system, the master node comprising:

• an information acquisition unit configured to acquire first information and second information,
• wherein the first information is associated with a guard area for the first wireless communication system, and the second information is associated with a position of the master node of the second wireless communication system;
• a determination unit configured to determine, based on the first information and the second information acquired by the information acquisition unit, that an interval between a reference point of the first wireless communication system and the master node satisfies a condition, wherein the condition is based on the guard area and a communication distance associated with the second wireless communication system;
• and
• a power control unit configured to operate the second wireless communication system with a given transmission power based on the determination that the interval satisfies the condition.