Transmission power control method, communication device and program

A communication device comprising:

• a communication unit that is able to communicate with one or more secondary usage nodes that subscribe to a second communication service making secondary usage of a spectrum assigned to a first communication service;
• and
• a control unit to control a transmission power used by the one or more secondary usage nodes, wherein the control unit
• acquires an acceptable interference power allocated to the second communication service;
• calculates a total sum of interference power levels on the first communication service based on transmission powers respectively required for the one or more secondary usage nodes;
• and
• excludes any secondary usage node of the one or more secondary usage nodes from allocation of the transmission power when the calculated total sum of interference power levels is larger than the acceptable interference power.

A program causing a computer as a control unit, the computer controlling a communication device including a communication unit that is able to communicate with one or more secondary usage nodes that subscribe to a second communication service making secondary usage of a spectrum assigned to a first communication service, wherein the control unit controls a transmission power used by the one or more secondary usage nodes and the control unit executing a process including:

• acquiring an acceptable interference power allocated to the second communication service;
• calculating a total sum of interference power levels on the first communication service based at least in part on transmission powers respectively required for the one or more secondary usage nodes;
• and
• excluding any secondary usage node of the one or more secondary usage nodes from allocation of the transmission power when the calculated total sum of interference power levels is larger than the acceptable interference power.