Abstract: The current disclosure relates to unlocking at least one vehicle door or a trunk and operating other welcome features on the vehicle, including but not limited to, opening a tailgate, turning on ambient lights or head lights, and starting a vehicle engine. The current disclosure is directed to a system and method for automatically unlocking at least one door or a trunk on the vehicle using a smartphone and a vehicle key fob. Due to the method provided herein, frequent recharging of the vehicle key fob is not required, nor does the size of the key fob have to be large enough to hold large batteries.

Abstract: The current disclosure relates to unlocking at least one vehicle door or a trunk and operating other welcome features on the vehicle, including but not limited to, opening a tailgate, turning on ambient lights or head lights, and starting a vehicle engine. The current disclosure is directed to a system and method for automatically unlocking at least one door or a trunk on the vehicle using a smartphone and a vehicle key fob. Due to the method provided herein, frequent recharging of the vehicle key fob is not required, nor does the size of the key fob have to be large enough to hold large batteries.

Abstract: The current disclosure relates to unlocking at least one vehicle door or a trunk and operating other welcome features on the vehicle, including but not limited to, opening a tailgate, turning on ambient lights or head lights, and starting a vehicle engine. The current disclosure is directed to a system and method for automatically unlocking at least one door or a trunk on the vehicle using a smartphone and a vehicle key fob. Due to the method provided herein, frequent recharging of the vehicle key fob is not required, nor does the size of the key fob have to be large enough to hold large batteries.

Abstract: The current disclosure relates to unlocking at least one vehicle door or a trunk and operating other welcome features on the vehicle, including but not limited to, opening a tailgate, turning on ambient lights or head lights, and starting a vehicle engine. The current disclosure is directed to a system and method for automatically unlocking at least one door or a trunk on the vehicle using a smartphone and a vehicle key fob. Due to the method provided herein, frequent recharging of the vehicle key fob is not required, nor does the size of the key fob have to be large enough to hold large batteries.

Abstract: A system and method for preventing relay attack on a passive entry system (PES) or other passive system (PS) included within a vehicle or other entity. The relay attack prevention may be based in part on an assessment of whether the fob is able to distinguish signal strength relative to messages communicated form different antennas within the vehicle and/or amongst different signal amplitude communicated from the same antenna.

Abstract: A system and method for preventing relay attack on a passive entry system (PES) or other passive system (PS) included within a vehicle or other entity. The relay attack prevention may be based in part on an assessment of whether the fob is able to distinguish signal strength relative to messages communicated form different antennas within the vehicle and/or amongst different signal amplitude communicated from the same antenna.

Abstract: A method and system is disclosed for determining presence of a portable transmitter relative to a boundary. The presence may be determined according to whether the portable transmitter is interior or exterior to the boundary. The boundary may be defined as a wireless boundary that corresponds with an intersection or overlapping portion set by multiple antenna fields.

Abstract: A system and method for authorizing a remote device amongst multiple remote devices for passive functions, such as passive entry and passive start, includes a vehicle having a plurality of strategically located antennas, combinations of which transmit a query signal and receive query responses, a challenge antenna amongst the plurality of antennas for transmitting a challenge signal to at least one of the multiple remote devices in accordance with a challenge order, and a control unit having a controller in communication with the antennas for determining the challenge order based upon the query responses. Upon a failure, the system determines which of the remote devices to challenge next based upon the failure type and the number of retries remaining.

Abstract: A system and method for authorizing a remote device amongst multiple remote devices for passive functions, such as passive entry and passive start, includes a vehicle having a plurality of strategically located antennas, combinations of which transmit a query signal and receive query responses, a challenge antenna amongst the plurality of antennas for transmitting a challenge signal to at least one of the multiple remote devices in accordance with a challenge order, and a control unit having a controller in communication with the antennas for determining the challenge order based upon the query responses. The controller can determine whether a remote device is located in an authorization zone, out of an authorization zone, or whether the remote device's location is indeterminate.

Abstract: A passive entry system and method for determining the location of a remote transmitter positioned near a vehicle. The system and method may include an irregularly shaped authorization zone. The authorization zone may be formed using as least three LF antennas. Alternatively, at least two antennas may be used to form at least one elliptically shaped authorization zone. A controller may determine the location of the fob when the fob is physically positioned within the authorization zone.

Abstract: A method and system is disclosed for determining presence of a portable transmitter relative to a boundary. The presence may be determined according to whether the portable transmitter is interior or exterior to the boundary. The boundary may be defined as a wireless boundary that corresponds with an intersection or overlapping portion set by multiple antenna fields.

Abstract: A passive entry system and method for determining the location of a remote transmitter positioned near a vehicle. The system and method may include an irregularly shaped authorization zone. The authorization zone may be formed using as least three LF antennas. Alternatively, at least two antennas may be used to form at least one elliptically shaped authorization zone. A controller may determine the location of the fob when the fob is physically positioned within the authorization zone.

Abstract: A system and method for authorizing a remote device amongst multiple remote devices for passive functions, such as passive entry and passive start, includes a vehicle having a plurality of strategically located antennas, combinations of which transmit a query signal and receive query responses, a challenge antenna amongst the plurality of antennas for transmitting a challenge signal to at least one of the multiple remote devices in accordance with a challenge order, and a control unit having a controller in communication with the antennas for determining the challenge order based upon the query responses. Upon a failure, the system determines which of the remote devices to challenge next based upon the failure type and the number of retries remaining.

Abstract: A system and method for authorizing a remote device amongst multiple remote devices for passive functions, such as passive entry and passive start, includes a vehicle having a plurality of strategically located antennas, combinations of which transmit a query signal and receive query responses, a challenge antenna amongst the plurality of antennas for transmitting a challenge signal to at least one of the multiple remote devices in accordance with a challenge order, and a control unit having a controller in communication with the antennas for determining the challenge order based upon the query responses. The controller can determine whether a remote device is located in an authorization zone, out of an authorization zone, or whether the remote device's location is indeterminate.

Abstract: A system and method for preventing relay attack on a passive entry system (PES) or other passive system (PS) included within a vehicle or other entity. The relay attack prevention may be based in part on an assessment of whether the fob is able to distinguish signal strength relative to messages communicated form different antennas within the vehicle and/or amongst different signal amplitude communicated from the same antenna.