US 12,345,805 B2
Proximity detection system
Christopher Barratt, Sophia-Antipolis (FR); Michel Beghin, Sophia-Antipolis (FR); and Philippe Genin, Sophia-Antipolis (FR)
Assigned to INSIGHT SIP, Grasse (FR)
Appl. No. 17/925,500
Filed by INSIGHT SIP, Grasse (FR)
PCT Filed May 26, 2021, PCT No. PCT/EP2021/064109
§ 371(c)(1), (2) Date Nov. 16, 2022,
PCT Pub. No. WO2021/244924, PCT Pub. Date Dec. 9, 2021.
Claims priority of application No. 20315291 (EP), filed on Jun. 1, 2020.
Prior Publication US 2023/0341541 A1, Oct. 26, 2023
Int. Cl. H04L 1/00 (2006.01); G01S 11/06 (2006.01); G01S 13/76 (2006.01); G01S 13/86 (2006.01); H04B 1/00 (2006.01)
CPC G01S 13/86 (2013.01) [G01S 11/06 (2013.01); G01S 13/76 (2013.01); H04B 1/005 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A proximity detection system between at least a first transceiver and at least a second transceiver, the first transceiver and the second transceiver each comprising at least one primary radio module and one secondary radio module, the system wherein:
the primary radio module of the first transceiver is able to communicate with the primary radio module of the second transceiver, according to a first frequency band and according to a first amplitude;
the secondary radio module of the first transceiver is able to communicate with the secondary radio module of the second transceiver, according to a second frequency band, different from the first frequency band, and according to a second amplitude, different from the first amplitude;
the first transceiver and the second transceiver being configured:
when the primary radio module of the first transceiver and the primary radio module of the second transceiver come closer to each other, falling below a primary communication distance, to estimate a primary distance value between the primary radio module of the first transceiver and the primary radio module of the second transceiver from a measurement of the strength of at least one signal received by the primary radio module of the first transceiver from the primary radio module of the second transceiver; and
if the estimated primary distance value falls below a secondary communication distance between the secondary radio module of the first transceiver and the secondary radio module of the second transceiver, to:
estimate a secondary distance value between the primary radio module of the first transceiver and the primary radio module of the second transceiver from at least a measurement of the transmission time of a signal transmitted from the secondary radio module of the first transceiver to the secondary radio module of the second transceiver; and,
If the estimated secondary distance value is less than a predetermined notification distance, to estimate a degree of nearness, and notify a detection of proximity if the degree of nearness exceeds a predetermined threshold, and wherein the degree of nearness comprises at least one of the following parameters: a time interval since the crossing of a threshold distance, the crossing of a threshold distance.