Energy efficient passive entry system

Details Energy efficient passive entry system Energy efficient passive entry system

2007-11-06

2007-11-06

Lee, Benjamin O. (Department: 2612)

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

C340S426160, C340S539210, C340S005610, C340S005720, C455S127500, C343S711000, C307S010100

Reexamination Certificate

active

11129159

ABSTRACT:
A passive entry system for a vehicle is provided that includes a vehicle-based communication module mounted in the vehicle and a portable communication device. The vehicle-based communication module includes a transmitter for transmitting a challenge signal to the portable communication device when in a polling state to determine a presence of the portable communication device for allowing access to the vehicle. The portable communication device includes a receiver for receiving the challenge signal and is responsive to the challenge signal when in a response state and non-responsive to the challenge signal when in a non-response state.

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