Transmission power allocation method, communication device and program

A communication device comprising:

• a communication unit that is able to communicate with a secondary usage node that transmits a radio signal of a second communication service making secondary usage of a spectrum assigned to a first communication service;
• and
• a control unit that allocates a transmission power to each second communication service, wherein the control unit
• determines an interference power acceptable for two or more second communication services when the two or more second communication services are operated,
• distributes the transmission power depending on the interference power among the two or more second communication services according to a first rule,
• distributes the transmission power depending on the interference power among the two or more second communication services according to a second rule,
• selects one of the first rule and the second rule based on the transmission power distributed according to the first rule and the transmission power distributed according to the second rule, and
• allocates the transmission power distributed according to the selected rule respectively to the two or more second communication services.

A program causing a computer to act as a control unit, the computer controlling a communication device including a communication unit that is able to communicate with a secondary usage node that transmits a radio signal of a second communication service making secondary usage of a spectrum assigned to a first communication service, wherein the control unit allocates a transmission power to each of two or more second communication services and the control unit executes a process including:

• determining an interference power acceptable for two or more second communication services when the two or more second communication services are operated;
• distributing the transmission power depending on the interference power among the two or more second communication services according to a first rule;
• distributing the transmission power depending on the interference power among the two or more second communication services according to a second rule;
• selecting one of the first rule and the second rule based on the transmission power distributed according to the first rule and the transmission power distributed according to the second rule;
• and
• allocating the transmission powers distributed according to the selected rule respectively to the two or more second communication services.