Patent ID: 7813769

Claim:
An onboard wireless communication system for a vehicle, comprising: wireless communication means for transmitting a signal out of the vehicle; power supply means for supplying power from a battery of the vehicle to the wireless communication means; and control means for controlling the wireless communication means and the power supply means, wherein: the control means lets the wireless communication means to transmit the signal out of the vehicle when the control means receives an external signal, which is originated outside of the onboard wireless communication system and is triggered by an unauthorized break-in of the vehicle, in a state where the power supply means maintains the supplying of the power, from the battery to the wireless communication means; the control means calculates a cumulative amount of current fed from the battery to the wireless communication means since turning off an ignition key of the vehicle; when the calculated cumulative amount becomes equal to or larger than a reference value, the control means lets the power supply means to stop the supplying of the power from the battery to the wireless communication means except time of receiving the external signal; and when the control means receives the external signal, the control means lets the power supply means to maintain the supplying of the power from the battery to the wireless communication means at least until completion of the transmission of the signal from the wireless communication means.