(19) United States
`(12) Patent Application Publication (10) Pub. No.: US 2018/0098201 A1
`
` Torello et al. (43) Pub. Date: Apr. 5, 2018
`
`
`US 20180098201A1
`
`(54)
`
`INDOOR LOCATION SERVICES USING A
`DISTRIBUTED LIGHTING NETWORK
`.
`(71) Apphcant: Cree, Inc, Durham, NC (US)
`
`(52) U.S.C1.
`CPC .......... H04W4/04 (2013.01); H053 33/0845
`(2013.01); H053 33/0827 (2013.01); H053
`33/0809 (2013.01); G01C 21/206 (2013.01)
`
`(72)
`
`Inventors: Jefl Torello, Holly Springs, NC (US);
`Collin Guarino, Holly Springs, NC
`(US)
`
`(57)
`
`ABSTRACT
`
`(21) Appl. No.: 15/832,341
`
`(22)
`
`Filed:
`
`Dec. 5, 2017
`
`Related US. Application Data
`
`(63) Continuation-in-part of application No. 15/192,035,
`filed on Jun. 24, 2016.
`
`(60) Provisional application No. 62/292,528, filed on Feb.
`8, 2016.
`
`Publication Classification
`
`(51)
`
`Int. Cl,
`H04 W 4/04
`H05B 33/08
`G01C 21/20
`
`(2009.01)
`(2006.01)
`(2006.01)
`
`.
`.
`.
`.
`A method Includes the steps of obtaimng d1stance measure-
`
`ments between a device and a number of lighting fixtures,
`processing the distance measurements to assign coordinates
`to each one of the lighting fixtures, and facilitating regis-
`tration of the coordinates of a subset of the lighting fixtures
`to obtain registered coordinates for all of the lighting fix-
`tures. The coordinates indicate a relative location of each
`one of the lighting fixtures with respect to one another. The
`registered coordinates indicate a location of each lighting
`fixture in a desired coordinate space. Accordingly, a location
`of a lighting fixture within a desired coordinate space can be
`easily obtained, which may enable significant additional
`functionality of the lighting fixture.
`
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`Page 27 of 97
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`Patent Application Publication
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`Patent Application Publication
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`Apr. 5, 2018 Sheet 28 0f 65
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`Patent Application Publication
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`Page 31 of 97
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`Patent Application Publication
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`Apr. 5, 2018 Sheet 31 0f 65
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`US 2018/0098201 A1
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`QBTAEN DESTANCE
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`Patent Application Publication
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`Apr. 5, 2018 Sheet 35 0f 65
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`QBTAEN DESTANCE
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`Apr. 5, 2018 Sheet 37 0f 65
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`Patent Application Publication
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`Apr. 5, 2018 Sheet 40 0f 65
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`US 2018/0098201 A1
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`Patent Application Publication
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`Apr. 5, 2018 Sheet 41 of 65
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`Apr. 5, 2018 Sheet 44 0f 65
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`Patent Application Publication
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`Apr. 5, 2018 Sheet 48 0f 65
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`Apr. 5, 2018 Sheet 55 0f 65
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`Patent Application Publication
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`Apr. 5, 2018 Sheet 56 0f 65
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`US 2018/0098201 A1
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`Patent Application Publication
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`Apr. 5, 2018 Sheet 57 0f 65
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`US 2018/0098201 A1
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`Apr. 5, 2018 Sheet 58 0f 65
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`US 2018/0098201 A1
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`FIG.55
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`Page 59 of 97
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`Patent Application Publication
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`Apr. 5, 2018 Sheet 59 of
`
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`US 2018/0098201 A1
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`Apr. 5, 2018 Sheet 61 0f 65
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`Patent Application Publication
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`Apr. 5, 2018 Sheet 63 0f 65
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`US 2018/0098201 A1
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`Patent Application Publication
`
`Apr. 5, 2018 Sheet 64 0f 65
`
`US 2018/0098201 A1
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`Vsrasee
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`RECEIVEA WIRELESS BEACON SIGNAL
`FROM A MOBILE DEVICE ATA
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`NUMBER OF LIGHTING FIXTURES
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`MOBILE DEVICE IN THE INDOOR SPACE
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`LOCATION OF THE MOBILE DEVICE
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`Patent Application Publication
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`Apr. 5, 2018 Sheet 65 0f 65
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`US 2018/0098201 A1
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`US 2018/0098201 A1
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`Apr. 5, 2018
`
`INDOOR LOCATION SERVICES USING A
`DISTRIBUTED LIGHTING NETWORK
`
`RELATED APPLICATIONS
`
`[0001] This application claims priority to and is a con-
`tinuation-in-part of US. patent application Ser. No. 15/192,
`035, filed Jun. 24, 2016, which claims the benefit of US.
`provisional patent application Ser. No. 62/292,528, filed
`Feb. 8, 2016, the disclosures of which are hereby incorpo-
`rated herein by reference in their entirety.
`
`FIELD OF THE DISCLOSURE
`
`[0002] The present disclosure relates to the automatic
`mapping of devices in a distributed lighting network and the
`utilization of mapped devices in a distributed lighting net-
`work to provide indoor location services to a user.
`
`BACKGROUND
`
`[0003] Lighting fixtures continue to evolve, incorporating
`features such as sensors, processing circuitry, networking
`circuitry, and the like. Accordingly, lighting fixtures may
`implement lighting programs, respond to the surrounding
`environment, and be controlled, for example, over a local
`area network and/or the Internet.
`
`lighting fixtures have been primarily
`[0004] Thus far,
`concerned with measuring environmental factors directly
`related to the light output thereof (e.g., ambient light and
`occupancy). These environmental factors have generally
`been used to make decisions locally, for example, regarding
`the light output level of the lighting fixture to which the
`sensors are attached.
`
`[0005] Networking circuitry has been incorporated into
`many lighting fixtures to allow them to communicate with
`one another. For example, a common approach is to form a
`mesh network of lighting fixtures in which the lighting
`fixtures can communicate with one another and/or receive
`
`commands from remote devices. Generally, these lighting
`fixture networks are used to provide control commands to
`various lighting fixtures or groups of lighting fixtures to
`adjust the light output thereof in some manner.
`[0006] While the above mentioned features may improve
`the utility of a lighting fixture or group of lighting fixtures,
`there are significant opportunities for improvement.
`
`SUMMARY
`
`[0007] The present disclosure relates to the automatic
`mapping of devices in a distributed lighting network and the
`utilization of mapped devices in a distributed lighting net-
`work to provide indoor location services to a user. In one
`embodiment, a distributed lighting network includes a num-
`ber of lighting fixtures and an indoor location services
`module. Each of the lighting fixtures has a known location
`in an indoor space, and provides a wireless beacon signal,
`where the wireless beacon signal
`identifies the lighting
`fixture from which it is provided and indicates a distance
`between a receiver of the wireless beacon signal and the
`lighting fixture form which the signal was provided. The
`indoor location services module determines a location of a
`
`mobile device in the indoor space based on information
`about each wireless beacon signal received by the mobile
`device and the known location of the lighting fixtures. Using
`the lighting fixtures to provide the wireless beacon signals,
`
`each of which has a fixed, known location, allows for highly
`accurate indoor location services for the mobile device.
`
`In one embodiment, the location of each one of the
`[0008]
`lighting fixtures in the distributed lighting network is auto-
`matically determined by obtaining a first set of distance
`measurements and a second set of distance measurements
`
`and processing the first set of distance measurements and the
`second set of distance measurements to assign coordinates to
`each one of the lighting fixtures. The first set of distance
`measurements are obtained using a first measurement
`method. The second set of distance measurements is
`
`obtained using a second measurement method, which is
`different from the first measurement method. By using both
`the first set of distance measurements and the second set of
`
`distance measurements, each of which is obtained by a
`different measurement method, the location of each one of
`the lighting fixtures can be obtained with a high degree of
`accuracy, thereby allowing the lighting fixtures to be used to
`provide indoor location services to a mobile device.
`[0009] Those skilled in the art will appreciate the scope of
`the present disclosure and realize additional aspects thereof
`after reading the following detailed description of the pre-
`ferred embodiments in association with the accompanying
`drawing figures.
`
`BRIEF DESCRIPTION OF THE DRAWING
`FIGURES
`
`[0010] The accompanying drawing figures incorporated in
`and forming a part of this specification illustrate several
`aspects of the disclosure, and together with the description
`serve to explain the principles of the disclosure.
`[0011]
`FIG. 1 is a block diagram of a distributed lighting
`network according to one embodiment of the present dis-
`closure.
`
`FIG. 2 is a functional schematic of a lighting fixture
`[0012]
`according to one embodiment of the present disclosure.
`[0013]
`FIG. 3 is a functional schematic of a sensor module
`according to one embodiment of the present disclosure.
`[0014]
`FIG. 4 is a functional schematic of a lighting fixture
`connected to a sensor module according to one embodiment
`of the present disclosure.
`[0015]
`FIG. 5 is a functional schematic of a controller
`according to one embodiment of the present disclosure.
`[0016]
`FIG. 6 is a functional schematic of a controller
`connected to a sensor module according to one embodiment
`of the present disclosure.
`[0017]
`FIG. 7 is a functional schematic of a border router
`according to one embodiment of the present disclosure.
`[0018]
`FIG. 8 is a functional schematic of a border router
`connected to a sensor module according to one embodiment
`of the present disclosure.
`[0019]
`FIG. 9 is a diagram illustrating a distributed light-
`ing system according to one embodiment of the present
`disclosure.
`
`FIG. 10 is a call flow diagram illustrating a process
`[0020]
`for automatically grouping a number of devices in a distrib-
`uted lighting network according to one embodiment of the
`present disclosure.
`[0021]
`FIG. 11 is a table indicating a detected link strength
`between lighting fixtures in a distributed lighting network.
`[0022]
`FIG. 12 is a table indicating a neighbor ranking for
`each one of a number of lighting fixtures in a distributed
`lighting network.
`
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`
`FIG. 13 is a flow diagram illustrating a process for
`[0023]
`adding devices to a distributed lighting network according to
`one embodiment of the present disclosure.
`[0024]
`FIG. 14 is a diagram illustrating a distributed
`lighting system according to one embodiment of the present
`disclosure.
`
`FIG. 15 is a flow diagram illustrating a process for
`[0025]
`grouping devices in a distributed lighting network according
`to one embodiment of the present disclosure.
`[0026]
`FIGS. 16A through 16C are diagrams illustrating a
`distributed lighting network according to various embodi-
`ment of the present disclosure.
`[0027]
`FIG. 17 is a call flow diagram illustrating a process
`for adjusting the light output of one or more lighting fixtures
`in a distributed lighting network according to one embodi-
`ment of the present disclosure.
`[0028]
`FIGS. 18A through 18D are diagrams illustrating a
`distributed lighting network according to various embodi-
`ments of the present disclosure.
`[0029]
`FIG. 19 is a flow diagram illustrating a process for
`detecting devices near entrances and/or exits according to
`one embodiment of the present disclosure.
`[0030]
`FIG. 20 is a flow diagram illustrating a process for
`determining and indicating a desired position of a border
`router in a distributed lighting network according to one
`embodiment of the present disclosure.
`[0031]
`FIG. 21 is a flow diagram illustrating a process for
`calibrating one or more ambient light sensors according to
`one embodiment of the present disclosure.
`[0032]
`FIG. 22 is a call flow diagram illustrating a process
`for determining and using an optimal communication chan-
`nel
`in a distributed lighting network according to one
`embodiment of the present disclosure.
`[0033]
`FIG. 23 is a call flow diagram illustrating a process
`for determining and using an optimal communication chan-
`nel
`in a distributed lighting network according to one
`embodiment of the present disclosure.
`[0034]
`FIGS. 24A and 24B are flow diagrams illustrating
`a process for detecting occupancy using an image sensor
`according to one embodiment of the present disclosure.
`[0035]
`FIG. 25 is a flow diagram illustrating a process for
`adjusting a light
`level of a lighting fixture in order to
`properly detect occupancy in a lighting fixture according to
`one embodiment of the present disclosure.
`[0036]
`FIG. 26 is a functional schematic of power con-
`verter circuitry according to one embodiment of the present
`disclosure.
`
`FIG. 27