METHOD FOR DETERMINING THE POSITION OF A PORTABLE USER DEVICE AROUND A VEHICLE AND ASSOCIATED LOCATION DEVICE
First Claim
Patent Images
1. Method of determining the position of a portable user device (SD′
- ) around a vehicle (V) by means of a location device (10′
) on board said vehicle (V) and communicating with the portable device (SD′
) by radio waves, said portable device (SD′
) being equipped with first means (M10) for measuring the received signal strength, and with second means (M20) for acceleration measurement, wherein whenever the portable device (SD′
) receives a signal from the location device (10′
), it comprises the following steps;
step E3;
Measuring and storing a value of strength of the signal (RSSI(t)) thus received,step E4;
Measuring and storing a value of acceleration (AC(t)) of the portable device (SD′
),step E5;
Calculating a ratio (R) between a variation of the strength value thus measured, relative to a strength value stored at a preceding instant (RSSI(t−
1)-RSSI(t)), and a variation of the acceleration value thus measured, relative to an acceleration value stored at said preceding instant (AC(t−
1)-AC(t)),step E6;
Comparing the ratio (R) thus calculated with at least one predetermined threshold (S1, S2), in order to determine a distance (D) between the portable device and the vehicle.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a method of determining the position of a portable user device around a vehicle by a location device placed on board the vehicle and communicating with the portable device by radio waves, including the execution of the following steps whenever the portable device receives a signal from the location device: step E3: Measuring and storing a value of strength of the signal) thus received; step E4: Measuring and storing a value of acceleration) of the portable device; step E5: Calculating a ratio between a variation of the strength value thus measured, relative to a strength value stored at a preceding instant-RSSI, and a variation of the acceleration value thus measured, relative to an acceleration value stored at the preceding instant-AC; step E6: Comparing the ratio thus calculated with at least one predetermined threshold, in order to determine a distance between the portable device and the vehicle.
8 Citations
15 Claims
-
1. Method of determining the position of a portable user device (SD′
- ) around a vehicle (V) by means of a location device (10′
) on board said vehicle (V) and communicating with the portable device (SD′
) by radio waves, said portable device (SD′
) being equipped with first means (M10) for measuring the received signal strength, and with second means (M20) for acceleration measurement, wherein whenever the portable device (SD′
) receives a signal from the location device (10′
), it comprises the following steps;step E3;
Measuring and storing a value of strength of the signal (RSSI(t)) thus received,step E4;
Measuring and storing a value of acceleration (AC(t)) of the portable device (SD′
),step E5;
Calculating a ratio (R) between a variation of the strength value thus measured, relative to a strength value stored at a preceding instant (RSSI(t−
1)-RSSI(t)), and a variation of the acceleration value thus measured, relative to an acceleration value stored at said preceding instant (AC(t−
1)-AC(t)),step E6;
Comparing the ratio (R) thus calculated with at least one predetermined threshold (S1, S2), in order to determine a distance (D) between the portable device and the vehicle. - View Dependent Claims (2, 3, 4, 5, 11, 12, 13)
- ) around a vehicle (V) by means of a location device (10′
-
6. Location device (10′
- ) for locating a portable user device (SD′
) around a vehicle (V), said device (10′
) being on board the vehicle (V), and communicating with the portable device (SD′
) by radio waves, said device (10′
) comprising means (M1) for receiving a signal strength value sent by the portable device (SD′
), said device (10′
) being further comprising;receiving means (M2) for receiving an acceleration value (AC(t)) sent by the portable device (SD′
),storage means (M3) for storing the strength values (RSSI(t)) and acceleration values (AC(t)) thus received, a clock (H1), calculation means (M4) for calculating a ratio (R) between a variation of the strength value thus measured, relative to a strength value stored at a preceding instant (RSSI(t−
1)-RSSI(t)), and a variation of the acceleration value thus measured, relative to an acceleration value stored at said preceding instant (AC(t−
1)-AC(t)),and means (M5) for comparing the ratio (R) thus calculated with at least one predetermined threshold (S1, S2), in order to determine a distance (D) between the portable device (SD′
) and the vehicle (V). - View Dependent Claims (7, 9, 10, 14, 15)
- ) for locating a portable user device (SD′
-
8. Portable user device (SD′
- ), communicating by radio waves with a location device (10′
) on board a motor vehicle (V), the portable device being designed to be located around the vehicle (V) by said location device (10′
), said portable device (SD′
) comprising first means (M1) for measuring a received radio signal strength value (RSSI(t)) and second means (M2) for measuring a value of acceleration (AC(t)) of said portable device (SD′
), first means (M30) for transmitting said strength value to the location device (10′
), and a clock (H2), said portable user device (SD′
) being further comprising;second means (M40) for transmitting the acceleration value (AC(t)) thus measured to the location device (10′
).
- ), communicating by radio waves with a location device (10′
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeContinental Automotive France (Continental AG), Continental Automotive GmbH (Continental AG)
-
Original AssigneeContinental Automotive France (Continental AG), Continental Automotive GmbH (Continental AG)
-
InventorsGODET, Sylvain, MERLET, Frederic
-
Granted Patent
-
Time in Patent OfficeDays
-
Field of Search
-
US Class Current
-
CPC Class CodesE05B 77/48 by electrical meansG01S 11/06 using intensity measurementsG01S 13/825 with exchange of informatio...G01S 5/0252 Radio frequency fingerprintingG01S 5/0264 at least one of the systems...G07C 2209/63 Comprising locating means f...G07C 9/00174 Electronically operated loc...G07C 9/00309 operated with bidirectional...H04B 17/318 Received signal strengthH04W 4/023 using mutual or relative lo...H04W 4/027 using movement velocity, ac...
