US 2017/0374641 A1Published application

Systems and methods for tracking items

AssigneeSekureTrak, Inc.

InventorsParminder K. Batra, Fadi Kahhaleh, Rien Heald

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Abstract

An example system includes a first beacon configured to communicate a first wireless signal. A first hub is in communication with the first beacon. The first hub is configured to detect a first signal strength of the first wireless signal. The example system further includes a second hub in communication with the first beacon. The second hub is configured to detect a second signal strength of the first wireless signal. The example system further includes a computing system in communication with the first hub and the second hub. The computing system includes a noise filter and a beacon assignor. The noise filter includes a quadratic estimator configured to output a first estimated distance between the first beacon and the first hub, output a second estimated distance between the first beacon and the second hub, and disregard a third estimated distance between the first beacon and the first hub if the third estimated distance is derived from a ghost signal. The beacon assignor is configured to assign the first beacon to the first hub if the first estimated distance is less than the second estimated distance.

Claims20

Dependent claims

A system for tracking items comprising:

a first beacon configured to communicate a first wireless signal, the first wireless signal including a first predetermined signal strength indicator;
a first hub located in a first area, the first hub configured to receive the first wireless signal and a first wireless ghost signal generated by the first beacon, wherein the first hub is configured to determine a first signal strength of the first wireless signal and a second signal strength of the first wireless ghost signal;
a second hub located in a second area, the second hub configured to receive the first wireless signal, wherein the second hub is configured to determine a third signal strength of the first wireless signal;
a memory configured to store the first signal strength, the second signal strength, the third signal strength, and the first predetermined signal strength indicator;
a processor configured to retrieve the first signal strength, the second signal strength, the third signal strength, and the first predetermined signal strength indicator from the memory, the processor configured to:
determine a first estimated distance between the first beacon and the first hub based on the first predetermined signal strength indicator and the first signal strength;
determine a second estimated distance between the first beacon and the first hub based on the first predetermined signal strength indicator and the second signal strength;
determine a third estimated distance between the first beacon and the second hub based on the first predetermined signal strength indicator and the third signal strength;
input the first estimated distance, the second estimated distance, and the third estimated distance into a Kalman filter matrix;
filter out the second estimated distance via the Kalman filter matrix;
output the first estimated distance and the second estimated distance via the Kalman filter matrix;
determine that the first estimated distance is less than the second estimated distance;
assign the first beacon to the first hub based on the first distance being less than the second distance;
and
determine that the first beacon is located in the first area based on the first beacon being assigned to the first hub.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/636,449Filed 28 Jun 2017
Priority: 28 Jun 2016
Published: 28 Dec 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H04W 64/006
Locating users or terminals or network equipment for network management purposes, e.g. mobility management: with additional information…
G01S 5/0215
Details: interference
G01S 5/0244
Details: accuracy or reliability of position solution or of measurements contributing thereto
G01S 5/0295
Using radio waves: proximity-based methods, e.g. position inferred from reception of particular signals