Collision detection device, communication device, collision detection method, and program

A communication device comprising:

• a transmission part configured to transmit a packet by radio;
• a power detection part configured to, at a given cycle, perform sampling of power of a spatial radio signal in a packet transmission period during which the transmission part transmits the packet;
• and
• a collision detection part configured to calculate, as an index value, at least one of an average value and a degree of variation of power of the spatial radio signal in the packet transmission period on a basis of sampled data obtained in the sampling by the power detection part, determine a reference value on a basis of transmission power of the packet, and then compare the index value with the reference value in order to detect whether or not collision of the packet is present.

A packet collision detection method executed by a communication device transmitting a packet by radio, the packet collision detection method comprising:

• performing sampling of power of a spatial radio signal in a packet transmission period during which the packet is transmitted;
• calculating, as an index value, at least one of an average value and a degree of variation of power of the spatial radio signal in the packet transmission period on a basis of sampled data obtained in the sampling;
• determining a reference value on a basis of transmission power of the packet;
• and
• comparing the index value with the reference value in order to detect whether or not collision of the packet with another packet is present.