Patent ID: 9292984
Filing Date: 2016-03-22
CPC Classification: B60R,G07C,H04W

Claim Text:
1. A wireless communication system comprising: a plurality of transmitting antennas being disposed at different positions of a vehicle, each of the transmitting antennas transmitting a primary signal to a communication area according to a driving voltage thereof; a portable device receiving the primary signal when the portable device is inside of any of the communication areas; a transmission control section being integrated to the vehicle and controlling the driving voltage of each of the transmitting antennas; and an approach determination section being integrated to the vehicle and determining whether the portable device is inside of a nearby area of one of the transmitting antennas transmitting the primary signal, wherein when the approach determination section determines that the portable device is inside of the nearby area, the transmission control section changes the driving voltage of another one of the transmitting antennas disposed outside of the nearby area of the one of the transmitting antennas such that the communication area of the another one of the transmitting antennas is increased to encompass the nearby area of the one of the transmitting antennas and the primary signal is retransmitted from the another one of the transmitting antennas.