US 12,145,536 B2
Method for activating a motor vehicle function and associated activation device
Sylvain Godet, Toulouse (FR); Rachid Benbouhout, Toulouse (FR); and Alexis Morin, Toulouse (FR)
Assigned to Continental Automotive Technologies GmbH, Hannover (DE)
Appl. No. 18/272,657
Filed by Continental Automotive Technologies GmbH, Hannover (DE)
PCT Filed Jan. 27, 2022, PCT No. PCT/EP2022/051916
§ 371(c)(1), (2) Date Jul. 17, 2023,
PCT Pub. No. WO2022/162071, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 2100852 (FR), filed on Jan. 29, 2021.
Prior Publication US 2024/0034274 A1, Feb. 1, 2024
Int. Cl. B60R 25/31 (2013.01); B60R 25/24 (2013.01); G01S 7/00 (2006.01); G01S 7/41 (2006.01); G01S 13/02 (2006.01); G01S 13/76 (2006.01); G01S 13/87 (2006.01); G01S 13/931 (2020.01)
CPC B60R 25/31 (2013.01) [B60R 25/24 (2013.01); G01S 7/006 (2013.01); G01S 7/412 (2013.01); G01S 13/0209 (2013.01); G01S 13/765 (2013.01); G01S 13/872 (2013.01); G01S 2013/9316 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A method for activating a function of a motor vehicle using an activation device, based on a mobile device carried by a user, the activation of the function being initiated by detection of the presence of the user in a predetermined area around the vehicle, and on the basis of the result of authentication of the mobile device by the vehicle, the method comprising:
a) transmitting, by the activation device comprising an antenna connected to an ultra-wide band radiation transmitter and receiver, ultra-wideband radiation in a reflective ultra-wideband mode reflected by a body of the user carrying the mobile device, said ultra-wideband radiation comprising only an identifier specific to a transceiver of the activation device,
b) detecting the presence of the user in the predetermined area by analyzing a predetermined profile, the predetermined profile comprising at least one peak of the ultra-wideband radiation transmitted by the activation device and reflected by the body of the user carrying the mobile device,
c) determining a distance between said activation device and the body of the user carrying the mobile device based on an instant corresponding to a maximum amplitude of the at least one peak of the ultra-wideband radiation, and
d) authenticating the mobile device by two-way ultra-wideband communication between the activation device and the mobile device based on locating of the body of the user carrying the mobile device in the predetermined area, wherein the two-way ultra-wideband communication enables messages to be exchanged between said activation device and the mobile device.