Power control for secondary communication system based on guard width and distance from primary communication system

A communication control method, comprising:

• in a communication device configured to control a second wireless communication system which is secondarily operated using a frequency channel used by a first wireless communication system:
• acquiring first information and second information, the first information of a position of a guard area for the first wireless communication system, the second of a position of a master node of the second wireless communication system;
• determining, using the acquired first information and the second information, whether an interval between a reference point of the first wireless communication system and the master node meets a condition which depends on a width of the guard area and a communication distance assumed for the second wireless communication system;
• operating the second wireless communication system with a given transmission power in an event the interval is determined to meet the condition;
• and
• providing information about another frequency channel to the master node in an event the condition is unmet.

A communication control system comprising:

• a master node, of a second wireless communication system, comprising one or more hardware processors configured to be secondarily operated by use of a frequency channel used by a first wireless communication system;
• and
• a communication control device comprising one or more hardware processors configured to:
• control operation of the second wireless communication system performed by the master node;
• acquire first information and second information, the first information of a position of a guard area for the first wireless communication system, the second information of a position of the master node;
• determine, by use of the first information and the second information, whether an interval between a reference point of the first wireless communication system and the master node meets a condition which depends on a width of the guard area and a communication distance assumed for the second wireless communication system;
• and
• operate the second wireless communication system with a given transmission power in an event the interval meets the condition;
• and
• provide information about another frequency channel to the master node in an event the condition is unmet.