LIGHT FIXTURE COMMISSIONING USING ENCODED LIGHT SIGNALS

• US 20160037293A1
• Filed: 07/30/2015
• Published: 02/04/2016
• Est. Priority Date: 07/31/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Jovicic, Aleksandar, Achar, Supreeth
• Granted Patent: US 9,749,782 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01C 21/206 specially adapted for indoor navigation
• CPC Class Codes: H04B 10/116 Visible light communication
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H05B 47/195 the transmission using visible or infrared light
• CPC Class Codes: H05B 47/199 Commissioning of light sources

Abstract

Methods, systems, and devices are described for commissioning light fixtures. One method may include receiving, at a mobile device, an encoded light signal from a light fixture in a plurality of light fixtures. The encoded light signal may be decoded to obtain an identifier associated with the light fixture, and a correspondence between the identifier and a plurality of locations of the plurality of light fixtures may be determined.

Claims

1. A method for mapping light fixtures, comprising:

receiving, at a mobile device, an encoded light signal from a light fixture in a plurality of light fixtures;

decoding the encoded light signal to obtain an identifier associated with the light fixture; and

determining a correspondence between the identifier and a plurality of locations of the mobile device with respect to a location of each light fixture of the plurality of light fixtures.

2. The method of claim 1, further comprising:

time-stamping the identifier; and

determining a sequence of time-stamped locations of the mobile device with respect to the locations of each light fixture of the plurality of light fixtures.

3. The method of claim 2, wherein determining the correspondence between the identifier and the plurality of locations comprises:

correlating the time-stamped identifier with the time-stamped locations of the mobile device.

4. The method of claim 2, further comprising:

acquiring time-stamped sensor measurements at the mobile device; and

processing at least some of the time-stamped sensor measurements using a probability function to determine the sequence of time-stamped locations of the mobile device.

5. The method of claim 4, wherein acquiring the time-stamped sensor measurements comprises:

acquiring camera measurements, the camera measurements comprising a direction-of-arrival of at least the encoded light signal received from the light fixture.

6. The method of claim 5, further comprising:

determining a location of the light fixture based at least in part on the direction-of-arrival of the encoded light signal received from the light fixture and based at least in part on the sequence of time-stamped locations of the mobile device.

7. The method of claim 5, further comprising:

determining locations of at least two light fixtures of the plurality of light fixtures based at least in part on directions-of-arrival of encoded light signals received from the at least two light fixtures and based at least in part on the sequence of time-stamped locations of the mobile device.

8. The method of claim 5, further comprising:

receiving, at the mobile device, at least one additional encoded light signal from at least one additional light fixture in the plurality of light fixtures;

decoding the at least one additional encoded light signal to obtain at least one additional identifier associated with the at least one additional light fixture;

time-stamping each of the at least one additional identifier; and

determining a correspondence between at least two identifiers having a common time-stamp and the plurality of locations of the mobile device with respect to the location of each light fixture of the plurality of light fixtures based at least in part on directions-of-arrival of the encoded light signal from which the at least two identifiers having the common time-stamp are decoded.

9. The method of claim 4, wherein processing the time-stamped sensor measurements using the probability function comprises:

processing the time-stamped sensor measurements using a Bayesian interference model.

10. The method of claim 4, wherein acquiring the time-stamped sensor measurements comprises:

acquiring at least one of camera measurements, inertial measurements, magnetic measurements, radio measurements, or a combination thereof.

11. The method of claim 2, wherein determining the sequence of time-stamped locations of the mobile device comprises:

estimating at least one movement of the mobile device; and

determining at least a second of the time-stamped locations in relation to at least a first of the time-stamped locations and the at least one estimated movement of the mobile device.

12. The method of claim 11, further comprising;

determining at least a first of the time-stamped locations based at least in part on a location of an external reference.

13. The method of claim 1, further comprising:

receiving input identifying a location of the light fixture associated with the identifier.

14. The method of claim 13, further comprising:

displaying information corresponding to a number of light fixtures comprising the plurality of light fixtures; and

receiving a selection from the information corresponding to the number of light fixtures.

15. The method of claim 14, wherein displaying the information comprises:

displaying a map of the number of light fixtures.

16. The method of claim 1, wherein receiving the encoded light signal at the mobile device comprises:

receiving the encoded light signal using a rolling shutter image sensor of the mobile device.

17. The method of claim 1, wherein at least one light fixture in the plurality of light fixtures is arranged within an indoor environment.

18. A mobile device for mapping light fixtures, comprising:

means for receiving an encoded light signal from a light fixture in a plurality of light fixtures;

means for decoding the encoded light signal to obtain an identifier associated with the light fixture; and

means for determining a correspondence between the identifier and a plurality of locations of the mobile device with respect to a location of each light fixture of the plurality of light fixtures.

19. The mobile device of claim 18, further comprising:

means for time-stamping the identifier; and

means for determining a sequence of time-stamped locations of the mobile device with respect to the locations of each light fixture of the plurality of light fixtures.

20. The mobile device of claim 19, further comprising:

means for acquiring time-stamped sensor measurements at the mobile device; and

means for processing at least some of the time-stamped sensor measurements using a probability function to determine the sequence of time-stamped locations of the mobile device.

21. A mobile device for mapping light fixtures, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory, the instructions being executable by the processor to;

receive an encoded light signal from a light fixture in a plurality of light fixtures;

decode the encoded light signal to obtain an identifier associated with the light fixture; and

determine a correspondence between the identifier and a plurality of locations of the mobile device with respect to a location of each light fixture of the plurality of light fixtures.

22. The mobile device of claim 21, wherein the instructions are executable by the processor to:

time-stamp the identifier; and

determine a sequence of time-stamped locations of the mobile device with respect to the locations of each light fixture of the plurality of light fixtures.

23. The mobile device of claim 22, wherein the instructions executable by the processor to determine the correspondence between the identifier and the plurality of locations comprise instructions executable by the processor to:

correlate the time-stamped identifier with the time-stamped locations of the mobile device.

24. The mobile device of claim 22, wherein the instructions are executable by the processor to:

acquire time-stamped sensor measurements at the mobile device; and

process at least some of the time-stamped sensor measurements using a probability function to determine the sequence of time-stamped locations of the mobile device.

25. The mobile device of claim 24, wherein the instructions executable by the processor to acquire the time-stamped sensor measurements comprise instructions executable by the processor to:

acquire camera measurements, the camera measurements comprising a direction-of-arrival of at least the encoded light signal received from the light fixture.

26. The mobile device of claim 25, wherein the instructions are executable by the processor to:

determine a location of the light fixture based at least in part on the direction-of-arrival of the encoded light signal received from the light fixture and based at least in part on the sequence of time-stamped locations of the mobile device.

27. The mobile device of claim 25, wherein the instructions are executable by the processor to:

determine locations of at least two light fixtures of the plurality of light fixtures based at least in part on directions-of-arrival of encoded light signals received from the at least two light fixtures and based at least in part on the sequence of time-stamped locations of the mobile device.

28. The mobile device of claim 25, wherein the instructions are executable by the processor to:

receive at least one additional encoded light signal from at least one additional light fixture in the plurality of light fixtures;

decode the at least one additional encoded light signal to obtain at least one additional identifier associated with the at least one additional light fixture;

time-stamp each of the at least one additional identifier; and

determine a correspondence between at least two identifiers having a common time-stamp and the plurality of locations of the mobile device with respect to the location of each light fixture of the plurality of light fixtures based at least in part on directions-of-arrival of the encoded light signals from which the at least two identifiers having the common time-stamp are decoded.

29. The mobile device of claim 24, wherein the instructions executable by the processor to acquire the time-stamped sensor measurements comprise instructions executable by the processor to:

acquire at least one of camera measurements, inertial measurements, magnetic measurements, radio measurements, or a combination thereof.

30. A non-transitory computer-readable medium storing computer-executable code for mapping light fixtures, the code executable by a processor to receive an encoded light signal from a light fixture in a plurality of light fixtures;

decode the encoded light signal to obtain an identifier associated with the light fixture; and

determine a correspondence between the identifier and a plurality of locations of the plurality of light fixtures.