VEHICLE PEPS SYSTEMS USING BLUETOOTH LOW-ENERGY AND WI-FI
First Claim
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1. A method of locating a key fob with respect to a vehicle, comprising the steps of:
- (a) detecting a short-range wireless signal communicated between the key fob and a plurality of nodes at the vehicle using an IEEE 802.11 protocol;
(b) calculating the distance of the key fob relative to each of the nodes attached to the vehicle based on the detected short-range wireless signal; and
(c) determining the location of the key fob based on the distance of the key fob relative to each of the nodes.
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Abstract
A system and method of locating a key fob with respect to a vehicle includes: detecting short-range wireless signals communicated between the key fob and a plurality of nodes at the vehicle using an IEEE 802.11 protocol; calculating the distance of the key fob relative to each of the nodes attached to the vehicle based on the detected short-range wireless signal; and determining the location of the key fob based on the distance of the key fob relative to each of the nodes.
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Citations
18 Claims
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1. A method of locating a key fob with respect to a vehicle, comprising the steps of:
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(a) detecting a short-range wireless signal communicated between the key fob and a plurality of nodes at the vehicle using an IEEE 802.11 protocol; (b) calculating the distance of the key fob relative to each of the nodes attached to the vehicle based on the detected short-range wireless signal; and (c) determining the location of the key fob based on the distance of the key fob relative to each of the nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of locating a key fob with respect to a vehicle, comprising the steps of:
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(a) detecting a short-range wireless signal communicated between the key fob and the vehicle using a Bluetooth Low Energy (LE) protocol; (b) determining the distance between the key fob and the vehicle using the detected short-range wireless signal; (c) detecting another short-range wireless signal transmitted between the key fob and the vehicle using an IEEE 802.11 protocol; (d) calculating the location of the key fob, relative to each of a plurality of nodes attached to the vehicle, using the IEEE 802.11 protocol wireless signal; and (e) determining whether the key fob is located within the vehicle based on the calculations in step (d). - View Dependent Claims (10, 11, 12, 13, 14, 16, 17, 18)
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15. A method of locating a key fob with respect to a vehicle, comprising the steps of:
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(a) detecting at a vehicle a short-range wireless signal transmitted by the key fob using an Bluetooth Low Energy (LE) protocol; (b) comparing the detected short-range wireless signal to one or more known signal strength thresholds for the Bluetooth LE protocol; (c) determining whether the key fob is within a predetermined range of the vehicle based on the comparison in step (b); (d) initiating an 802.11 receiver using a plurality of nodes at the vehicle when the key fob is within the predetermined range of the vehicle; (e) calculating the location of the key fob relative to each of the plurality of nodes using an IEEE 802.11 wireless signal received at each node; and (f) determining whether the key fob is located within the vehicle based on the calculations in step (e).
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Specification