Frequency Sharing Method, Receiving Station and Transmitting Station

A receiving station of a system that constitutes a frequency sharing radio system in which a plurality of systems shares a frequency, the receiving station comprising:

• a beacon control unit that generates, upon receipt of a signal from a transmitting station of the system at a transmission frequency, beacon information based on power of the signal received from the transmitting station;
• and
• a beacon generating unit that generates a beacon signal indicating a reception range of the receiving station based on the beacon information, and that transmits the beacon signal at the transmission frequency.

A transmitting station of a system newly established in a frequency sharing radio system including a plurality of systems that share a frequency, the system using a frequency that an existing system uses, the transmitting station comprising:

• a transmission control unit that detects a beacon signal indicating a reception range of a receiving station of the existing system transmitted from the receiving station at a frequency used by the existing system, judges whether signal transmission is possible based on a result of the detection, and generates transmission-control information including a result of the judgment;
• and
• a transmitting unit that transmits a signal based on the transmission-control information.