The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2022
Filed:
Jun. 26, 2020
Denso International America, Inc., Southfield, MI (US);
Denso Corporation, Kariya, JP;
Osman Ahmed, Bloomfield Hills, MI (US);
Yuki Tokunaga, Kariya, JP;
DENSO International America, Inc., Southfield, MI (US);
DENSO CORPORATION, Kariya, JP;
Abstract
A mobile access device includes a transceiver and a control module. The transceiver transmits and receives ultra-wideband signals including a first challenge signal. The control module: transmits via the transceiver the first challenge signal to a vehicle, where the first challenge signal is associated with a passive entry or a passive start operation of the vehicle, based on the first challenge signal, receive a response signal from the vehicle, determine a distance between the mobile access device and the vehicle based on the response signal, determine a wait period based on the distance, wait a minimum period, where the minimum period is a minimum of (i) the wait period and (ii) an advertisement period or a predetermined ranging period, and subsequent to waiting the minimum period, transmit a second challenge signal to the vehicle to update the distance between the mobile access device and the vehicle.