公开(公告)号：US11904810B2

公开(公告)日：2024-02-20

申请号：US17625891

申请日：2020-06-17

Applicant: VALEO COMFORT AND DRIVING ASSISTANCE

Inventor： Jean-Michel Tessier ,  Nicolas Barbier ,  Nicolas Ronez ,  Sebastien Creiche ,  Evangelino Ribeiro

IPC: B60R25/24 ,  H04B17/318 ,  H04W4/029

CPC classification number: B60R25/245 ,  H04B17/318 ,  H04W4/029

Abstract: A system for hands-free access to a vehicle includes a hands-free access device that transmits a location frame of a modulated signal and a pure carrier signal, receives a measurement of a received signal strength of a primary received signal performed on the pure carrier signal by a hands-free identifier, and receives information on an absence or presence of noise in the location frame. Additionally, the hands-free access device authorizes or prevents access to the vehicle. The system further includes a hands-free identifier that receives the location frame, performs a measurement of the received signal strength of the primary received signal on the pure carrier signal, sends the hands-free access device the measurement of the received signal strength of the primary received signal, checks the presence of noise in the location frame, and sends the hands-free access device information on the absence or presence of noise in the location frame.

公开(公告)号：US20220258694A1

公开(公告)日：2022-08-18

申请号：US17625891

申请日：2020-06-17

Applicant: VALEO COMFORT AND DRIVING ASSISTANCE

Inventor： Jean-Michel Tessier ,  Nicolas Barbier ,  Nicolas Ronez ,  Sebastien Creiche ,  Evangelino Ribeiro

IPC: B60R25/24 ,  H04B17/318 ,  H04W4/029

Abstract: The invention relates to a system for hands-free access (1) to a vehicle (2), comprising: —a hands-free access device (20) configured to: —transmit a location frame (2a) comprising a modulated signal (20a) and a pure carrier signal (21a); —receive a measurement of the received signal strength of a primary received signal (RSSI1) performed on said pure carrier signal (21a) by a hands-free identifier (10); —receive information (1a) on the absence or presence of noise (22a) in said location frame (2a); —depending on said measurement of the received signal strength of a primary received signal (RSSI1) and on said information (1a) on the absence or presence of noise (22a), authorize or prevent access to said vehicle (2); —a hands-free identifier (10) configured to: —receive said location frame (2a); —perform a measurement of the received signal strength of a primary received signal (RSSI1) on said pure carrier signal (21a); —send said hands-free access device (20) said measurement of the received signal strength of a primary received signal (RSSI1); —check the presence of noise (22a) in said location frame (2a); —send the hands-free access device (20) information (1a) on the absence or presence of noise (22a) in said location frame (2a).