Motion localization in a wireless mesh network based on motion indicator values

Patent metadata

Field	Value
Publication number	US-10109167-B1
Application number	US-201715789761-A
Country	US
Kind code	B1
Filing date	Oct 20, 2017
Priority date	Oct 20, 2017
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

In a general aspect, a location of detected motion in a space is determined. In some aspects, motion of an object in a space is detected based on wireless signals communicated through the space by a wireless communication system that includes multiple wireless communication devices. Each wireless signal is transmitted and received by a respective pair of the wireless communication devices. Motion indicator values are computed for the respective wireless communication devices. The motion indicator value for each individual wireless communication device represents a degree of motion detected by the individual wireless communication device based on a subset of the wireless signals transmitted or received by the individual wireless communication device. A location of the detected motion in the space is determined based on the motion indicator values.

First claim

What is claimed is:

1. A motion detection method comprising:
detecting motion of an object in a space based on wireless signals communicated through the space by a wireless communication system comprising multiple wireless communication devices, each wireless signal being transmitted and received by a respective pair of the wireless communication devices on receipt of a beacon wireless signal transmitted by a hub device;
by operation of one or more processors, computing motion indicator values for the respective wireless communication devices, the motion indicator value for each individual wireless communication device representing a degree of motion detected by the individual wireless communication device based on a subset of the wireless signals transmitted or received by the individual wireless communication device; and
determining a location of the detected motion in the space based on the motion indicator values received in response to the beacon wireless signal.

2. The method of claim 1 , wherein the wireless communication system comprises the hub device and remote sensor devices, wherein the hub device receives motion indicator values from the remote sensor devices and determines the location of the detected motion based on the received motion indicator values.

3. The method of claim 1 , wherein the motion indicator values are aggregate motion indicator values, and the method comprises:
obtaining link motion indicator values for respective communication links in the wireless communication system, each communication link provided by a respective pair of the wireless communication devices; and
computing the aggregate motion indicator value for each wireless communication device based on the link motion indicator values for the subset of the communication links supported by the wireless communication device.

4. The method of claim 3 , wherein computing the aggregate motion indicator value for a wireless communication device comprises weighting the link motion indicator values for the subset of communication links based on signal quality metrics for the respective communication links.

5. The method of claim 1 , wherein:
the wireless communication system comprises a plurality of communication links, each communication link provided by a respective pair of the wireless communication devices, each communication link comprising multiple communication paths, each communication path between a first signal hardware path of a first wireless communication device of the pair and a second signal hardware path of a second wireless communication device of the pair;
the motion indicator values are aggregate motion indicator values; and
the method comprises:
obtaining path motion indicator values for respective communication paths in the wireless communication system; and
computing the aggregate motion indicator value for each wireless communication device based on the path motion indicator values for the subset of the communication paths supported by the wireless communication device.

6. The method of claim 1 , comprising computing, for each wireless communication device, a confidence factor based on scaling the motion indicator value for the wireless communication device by a normative motion indicator value for the wireless communication devices, wherein the location of the detected motion is determined based on the confidence factors.

7. The method of claim 1 , wherein determining the location of the detected motion in the space comprises determining which of the wireless communication devices is nearest the detected motion based on comparing the respective motion indicator values for the wireless communication devices.

8. The method of claim 1 , wherein the location of the detected motion in the space is determined based on signal quality metrics for respective communication links in the wireless communication system, each communication link provided by a respective pair of the wireless communication devices.

9. The method of claim 8 , wherein determining the location of the detected motion in the space comprises combining signal quality metrics for the subset of communication links supported by each wireless communication device.

10. The method of claim 1 , comprising providing the motion indicator values as inputs to a neural network; and determining the location of the detected motion based on an output of the neural network.

11. A non-transitory computer-readable storage medium storing instructions that are operable when executed by a data processing apparatus to perform operations comprising:
detecting motion of an object in a space based on wireless signals communicated through the space by a wireless communication system comprising multiple wireless communication devices, each wireless signal being transmitted and received by a respective pair of the wireless communication devices on receipt of a beacon wireless signal transmitted by a hub device;
computing motion indicator values for the respective wireless communication devices, the motion indicator value for each individual wireless communication device representing a degree of motion detected by the individual wireless communication device based on a subset of the wireless signals transmitted or received by the individual wireless communication device; and
determining a location of the detected motion in the space based on the motion indicator values received in response to the beacon wireless signal.

12. The non-transitory computer-readable storage medium of claim 11 , wherein the wireless communication system comprises the hub device and remote sensor devices, wherein the hub device receives motion indicator values from the remote sensor devices and determines the location of the detected motion based on the received motion indicator values.

13. The non-transitory computer-readable storage medium of claim 11 , wherein the motion indicator values are aggregate motion indicator values, and the operations comprise:
obtaining link motion indicator values for respective communication links in the wireless communication system, each communication link provided by a respective pair of the wireless communication devices; and
computing the aggregate motion indicator value for each wireless communication device based on the link motion indicator values for the subset of the communication links supported by the wireless communication device.

14. The non-transitory computer-readable storage medium of claim 13 , wherein computing the aggregate motion indicator value for a wireless communication device comprises weighting the link motion indicator values for the subset of communication links based on signal quality metrics for the respective communication links.

15. The non-transitory computer-readable storage medium of claim 11 , wherein:
the wireless communication system comprises a plurality of communication links, each communication link provided by a respective pair of the wireless communication devices, each communication link comprising multiple communication paths, each communication path between a first signal hardware path of a first wireless communication device of the pair and a second signal hardware path of a second wireless communication device of the pair;
the motion indicator values are aggregate motion indicator values; and
the operations comprise:
obtaining path motion indicator values for respective communication paths in the wireless communication system; and
computing the aggregate motion indicator value for each wireless communication device based on the path motion indicator values for the subset of the communication paths supported by th

Assignees

• Cognitive Systems Corp

Inventors

• Olekas Christopher Vytautas
• Griesdorf Dustin

Classifications

• G01S13/56

  for presence detection {(presence detection using near field arrangements G01V3/00, e.g. G01V3/08, G01V3/12; burglar, theft or intruder alarms with electrical actuation G08B13/22 - G08B13/26)} · CPC title

• G01S13/003

  Bistatic radar systems; Multistatic radar systems · CPC title

• G01S7/415

  Identification of targets based on measurements of movement associated with the target · CPC title

• G01S7/006

  using shared front-end circuitry, e.g. antennas (G01S13/765, G01S13/825 take precedence) · CPC title

• H04W4/02

  Services making use of location information · CPC title