Patent ID: 11904810
Assignee: VALEO COMFORT AND DRIVING ASSISTANCE
Field: Control (Instruments)
Classification: CPC B  G  H | IPC B  H

Claim 19:
20. A method for hands-free access to a vehicle, wherein said hands-free access method comprises:
transmitting, by a hands-free access device, a location frame to said vehicle, said location frame comprising a modulated signal and a pure carrier signal transmitted during time windows at regular time intervals;
receiving, by a hands-free identifier said location frame;
performing, by said hands-free identifier at least one measurement of a received signal strength of a primary received signal on said pure carrier signal of said location frame;
sending, by said hands-free identifier said at least one measurement of the received signal strength of a primary received signal;
receiving, by said hands-free access device said at least one measurement of the received signal strength of a primary received signal;
checking, by said hands-free identifier a presence of noise in said location frame;
sending, by said hands-free identifier said hands-free access device information on an absence or presence of noise in said location frame;
receiving, by said hands-free access device, said information on the absence or presence of noise; and
authorizing or preventing access to said vehicle 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 in said location frame.