Patent ID: 7639124

Claim:
A receiver included in a wheel identifying apparatus that comprises: a plurality of transceivers that are respectively located on a plurality of wheels of a vehicle, each of the transceivers including a first receiving unit that receives a trigger signal, a first controlling unit that determines strength of the trigger signal received by the first receiving unit and stores, in a frame, signal strength information indicating the determined strength of the trigger signal, and a transmitting unit that transmits the frame in response to receipt of the trigger signal by the first receiving unit; a triggering device that is located on a body of the vehicle at different distances from the transceivers to transmit the trigger signal; and the receiver that is located on the body of the vehicle to receive the frames transmitted by the transceivers and identify, for each of the received frames, the wheel on which the transceiver having transmitted the frame is located, wherein the receiver comprises: a second receiving unit that receives the frames transmitted by the transceivers; and a second controlling unit that identifies, for each of the frames received by the second receiving unit, the wheel on which the transceiver having transmitted the frame is located based on the fact that the strengths indicated by the signal strength information stored in the frames are inversely proportional to the distances from the triggering device to the transceivers having transmitted the frames.