Apparatus and method for detecting location of wireless device to prevent relay attack
First Claim
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1. A method for preventing relay attack on a passive entry passive start (PEPS) system of a vehicle, the PEPS system having a base station at the vehicle, the method comprising:
- transmitting, by a fob, a polling signal to the base station;
in response to the base station receiving the polling signal from the fob, transmitting, by the base station, a first ultra-wideband (UWB) signal to the fob;
transmitting, by the fob, a second ultra-wideband (UWB) signal to the base station in response to the first UWB signal, wherein an operating frequency of each UWB signal is between 3 GHz and 10 GHz and each UWB signal has a bandwidth of at least 500 MHz;
determining, by the base station, a distance of the fob to the vehicle based on a round trip time of flight of the UWB signals between the fob and the base station; and
detecting, by the base station, a relay attack of the PEPS system depending on the determined distance of the fob to the vehicle.
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Abstract
A passive entry passive start (PEPS) method for preventing relay attack includes detecting a distance of a wireless device to a vehicle based on a time of flight of an ultra-wideband (UWB) signal between the wireless device and a base station at the vehicle. The method further includes enabling by the base station a function of the vehicle only when the distance of the wireless device to the vehicle is within a zone of the vehicle.
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Citations
4 Claims
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1. A method for preventing relay attack on a passive entry passive start (PEPS) system of a vehicle, the PEPS system having a base station at the vehicle, the method comprising:
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transmitting, by a fob, a polling signal to the base station; in response to the base station receiving the polling signal from the fob, transmitting, by the base station, a first ultra-wideband (UWB) signal to the fob; transmitting, by the fob, a second ultra-wideband (UWB) signal to the base station in response to the first UWB signal, wherein an operating frequency of each UWB signal is between 3 GHz and 10 GHz and each UWB signal has a bandwidth of at least 500 MHz; determining, by the base station, a distance of the fob to the vehicle based on a round trip time of flight of the UWB signals between the fob and the base station; and detecting, by the base station, a relay attack of the PEPS system depending on the determined distance of the fob to the vehicle. - View Dependent Claims (2)
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3. A passive entry passive start (PEPS) vehicle system configured to prevent relay attack, the system comprising:
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a fob; and a base station at a vehicle; wherein the fob is further configured to transmit a polling signal to the base station; wherein the base station is configured to transmit a first ultra-wideband (UWB) signal to the fob in response receiving the polling signal; wherein the fob is further configured to transmit a second UWB signal to the base station in response to receiving the first UWB signal; wherein an operating frequency of each UWB signal is between 3 GHz and 10 GHz and each UWB signal has a bandwidth of at least 500 MHz; wherein the base station is further configured to determine a distance of the fob to the vehicle based on a round trip time of flight of the UWB signals between the fob and the base station and detect a relay attack of the PEPS system depending on the determined distance of the fob to the vehicle. - View Dependent Claims (4)
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Specification