US 11,904,810 B2
System for hands-free access to a vehicle
Jean-Michel Tessier, Créteil (FR); Nicolas Barbier, Créteil (FR); Nicolas Ronez, Créteil (FR); Sebastien Creiche, Créteil (FR); and Evangelino Ribeiro, Créteil (FR)
Assigned to VALEO COMFORT AND DRIVING ASSISTANCE, Créteil (FR)
Appl. No. 17/625,891
Filed by VALEO COMFORT AND DRIVING ASSISTANCE, Créteil (FR)
PCT Filed Jun. 17, 2020, PCT No. PCT/EP2020/066830
§ 371(c)(1), (2) Date Jan. 10, 2022,
PCT Pub. No. WO2021/008803, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 1907846 (FR), filed on Jul. 12, 2019.
Prior Publication US 2022/0258694 A1, Aug. 18, 2022
Int. Cl. B60R 25/24 (2013.01); H04B 17/318 (2015.01); H04W 4/029 (2018.01)
CPC B60R 25/245 (2013.01) [H04B 17/318 (2015.01); H04W 4/029 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A system for hands-free access to a vehicle, said hands-free access system comprising:
a hands-free access device of said vehicle configured to:
transmit a location frame, said location frame comprising a modulated signal and a pure carrier signal transmitted during time windows at different time intervals,
receive at least one measurement of a received signal strength of a primary received signal performed on said pure carrier signal by a hands-free identifier, and
receive information on an absence or presence of noise in said location frame, said information being sent by said hands-free identifier,
wherein, depending on said at least one measurement of the received signal strength of a primary received signal and on said information on the absence or presence of noise, authorize or prevent access to said vehicle,
a hands-free identifier configured to:
receive said location frame transmitted by said hands-free access device of said vehicle,
perform at least one measurement of the received signal strength of a primary received signal on said pure carrier signal of said location frame,
send said hands-free access device said at least one measurement of the received signal strength of a primary received signal,
check the presence of noise in said location frame, and
send the hands-free access device information on the absence or presence of noise in said location frame.