• Patent Title: Secure vehicle access system, key, vehicle and method therefor
  • Application No.: US15841025
    Application Date: 2017-12-13
  • Publication No.: US10239494B2
    Publication Date: 2019-03-26
  • Inventor: Bernhard Spiess
  • Applicant: NXP B.V.
  • Applicant Address: NL Eindhoven
  • Assignee: NXP B.V.
  • Current Assignee: NXP B.V.
  • Current Assignee Address: NL Eindhoven
  • Agent Rajeev Madnawat
  • Priority: EP16204043 20161214
  • Main IPC: H04M1/60
  • IPC: H04M1/60 B60R25/24 G07C9/00 H04B1/69
Secure vehicle access system, key, vehicle and method therefor
Abstract:
A secure vehicle access system comprises a vehicle and a key associated with the vehicle. The key comprises: a radio frequency, RF, key transceiver configured to: broadcast at least one signal; and listen for an acknowledgement message from the vehicle. The vehicle comprises: a radio frequency, RF, vehicle transceiver configured to: listen for the at least one broadcast signal from the key; and in response thereto, transmit an acknowledgement message back to the key to establish a communication link between the vehicle and the key. The key further comprises a ranging circuit configured to perform a distance determination between the vehicle and the key, following the establishment of the communication link, to determine whether to allow access to the vehicle.
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