Abstract: Devices in a wireless network, such as wirelessly networked lighting devices, utilize two different types of radios, e.g. implementing two or more protocols such as Bluetooth and WiFi. Such radios operate in overlapping frequency bands of the RF spectrum. Time Division Multiplexing (TDM) of the two types of radio operations mitigates interference between the protocols competing in the spectrum overlap. In the examples with lighting devices, a driver of the light source provides a data bus that may be used as an auxiliary communications channel to implement TDM access by the radios to the overlapping frequency bands.

Abstract: The disclosure provides an example of a system and a method for command execution synchronization in a nodal network. In one example, the method includes starting at a first time, propagating a message including an instruction and timestamp, in a nodal network including a plurality of wireless communication nodes (nodes). The timestamp identifies a second time later than the first time by an amount of time equal to or greater than a period of delay expected for propagation of the message through the nodal network to all of the nodes. The method also includes running a software (soft) clock in each of the nodes, the soft clocks being synchronized to within a timing error tolerance value of the soft clocks in other of the nodes and executing, by each respective one of the nodes, the instruction when the soft clock of the respective nodes reaches the second time identified by the timestamp.

Abstract: Described examples include light fixtures and/or radio frequency (RF) nodes located in a service volume provided with a mobile asset detection system. The RF nodes receive beacon signals transmitted by mobile assets within the service volume. The mobile asset detection system includes a processor, a transceiver and multi-element antenna array. The multi-element antenna array includes multiple discrete antenna elements that, in some examples, are arranged so that at least one of the discrete antenna elements is non-coplanar with the other discrete antenna elements of the antenna array. Using signal attribute values determined from a signal received via each of the respective discrete antenna elements, a three dimensional estimate of the location of the mobile assets in a service volume may be determined.

Abstract: Radio frequency-enabled nodes, in an example asset tracking system, receive a basic message including an asset tracking tag identifier from an asset tag. The nodes measure a signal attribute of the received message; and each receiving node transmits a node asset message including the asset tag identifier, a respective node identifier, and the measured signal attribute. Edge gateways each receive one or more node asset messages transmitted by some number of the radio frequency-enabled nodes and rank respective node identifiers based on the measured signal attribute. Each edge gateway forwards an aggregated message to a fog gateway, which parses data from the aggregated messages to form a node identifier tuple identifying at least three nodes near the asset tag. Ordered identifiers from the tuple and known locations of the identified nearby nodes can then be processed to estimate of the location of the asset tag.

Abstract: The disclosure provides an example of a system and a method for command execution synchronization in a flood network. In one example, the method includes propagating a message including an instruction, from a gateway to a plurality of ancillary nodal devices (devices) in a flood network. Each of the plurality of devices is within an equal number of transmissive steps of the gateway through the flood network such that the message is propagated with approximately equivalent delay to each of the plurality of devices and substantially simultaneously received by all of the devices. The method also includes substantially simultaneously transmitting the message from each respective one of the devices to end nodal devices (end nodes) of a group of end nodes in the flood network in communication with the respective one of the devices.

Abstract: Devices in a wireless network, such as wirelessly networked lighting devices, utilize two different types of radios, e.g. implementing two or more protocols such as Bluetooth and WiFi. Such radios operate in overlapping frequency bands of the RF spectrum. Time Division Multiplexing (TDM) of the two types of radio operations mitigates interference between the protocols competing in the spectrum overlap. In the examples with lighting devices, a driver of the light source provides a data bus that may be used as an auxiliary communications channel to implement TDM access by the radios to the overlapping frequency bands.

Abstract: A system includes a plurality of lighting devices connected in a network to communicate in a service area, and a smart tag configured to communicate with one or more of the lighting devices. Each respective lighting device is configured to transmit a radio frequency signal including a device identifier of the respective lighting device. In response to expiration of a time period or an occurrence of an event, the smart tag is configured to transition from a low power consumption sleep mode to an awake mode. During the awake mode, the smart tag is configured to provide information that enables a processor or other computing device to determine a position of the smart tag or any asset associated with the smart tag in the service area. Upon transmission of the information, the smart tag is transitioned from the awake mode back to the low power consumption sleep mode.

Abstract: Radio frequency-enabled nodes, in an example asset tracking system, receive a basic message including an asset tracking tag identifier from an asset tag. The nodes measure a signal attribute of the received message; and each receiving node transmits a node asset message including the asset tag identifier, a respective node identifier, and the measured signal attribute. Edge gateways each receive one or more node asset messages transmitted by some number of the radio frequency-enabled nodes and rank respective node identifiers based on the measured signal attribute. Each edge gateway forwards an aggregated message to a fog gateway, which parses data from the aggregated messages to form a node identifier tuple identifying at least three nodes near the asset tag. Ordered identifiers from the tuple and known locations of the identified nearby nodes can then be processed to estimate of the location of the asset tag.

Abstract: Examples of a system and a method for asset tracking are provided. The system includes wireless communication nodes in a space that receive a basic message including an asset tracking tag identifier and a basic message sequence number transmitted by an asset tracking tag. The wireless communication nodes measure a received basic message signal attribute, and transmit a node asset message including the asset tracking tag identifier, the basic message sequence number, a node identifier, and the measured signal attribute of the received basic message to an edge gateway. The edge gateway may receive the transmitted node asset message transmitted by each of some number of the wireless communication nodes and rank respective node identifiers extracted from the received node asset messages based the measured signal attribute. The edge gateway forwards an aggregated message to a fog gateway for obtaining an estimate of the location of the asset tracking tag.

Abstract: Techniques are disclosed for detecting changes in occupancy as well as the number of occupants within an area. Detection of one or more occupants entering or leaving the area may be accomplished using a sensor having a quantity of pixels. The pixels may be configured to receive thermal energy emitted from one or more objects present in the area, including from one or more occupants. In response to receiving the emitted thermal energy, the sensor may be configured to create thermal images of the area. These thermal images may include a plurality of thermal intensity values associated with one or more pixels of the sensor. Two or more thermal images can be compared to identify a change in thermal intensity values. A change in the occupancy of the area may be determined by based on the identified change in thermal intensity values.

Abstract: A tag is configured to provide information that enables a processor or other computing device to locate the tag and any asset associated with the tag in an area. The tag incorporates a motion sensor responsive to movements of the tag above a predetermined rate and a predetermined magnitude. In response to the movements above the predetermined rate and magnitude, the motion sensor generates a voltage exceeding a predetermined threshold. An energy-saving process exploits the tag's microcontroller's transitions between a “sleep” state and an “awake” state. While asleep, the microcontroller maintains a clock and data in memory, and monitors an input from the motion sensor. In response to voltages at the input over the predetermine threshold, the microcontroller receives signals from one or more nearby beacon nodes in a network operating in the area, process the signals and transmit information based on the processed signals, for a position determination.

Abstract: A lighting system includes lighting devices and an update manager. The lighting devices include various hardware versions and/or functionalities. The lighting devices are queried to determine existing hardware versions and/or functionalities. The query is sent via a wireless mesh network of the lighting system. An Over-The-Air (OTA) update includes multiple different lighting device programming images, where each image corresponds to one of the existing hardware versions and/or functionalities. The OTA update is delivered via point-to-point connections between the update manager and some number of lighting devices and/or between the lighting devices. Upon receipt, individual lighting devices determine whether a lighting device programming image is needed and/or which of the lighting device programming images is appropriate.

Abstract: The disclosure provides examples of systems and methods for determining locations of a number of radio frequency-enabled devices such as mobile devices and radio frequency-equipped beacons/luminaires within an indoor location. The radio frequency-enabled devices may be part of an indoor positioning system and/or content delivery system. The examples describe obtaining an angle of arrival (AoA) of the signals received by the respective radio frequency-enabled devices. The AOA data is used to identify the relative positions of the radio frequency-enabled devices as the mobile device moves about the indoor location. Upon comparing AOA measurements of the collected data related to a map of the location, the system may generate a data structure that may be presented graphically as a map of positions of the devices at the location. The described examples may enable a rapid commissioning process with respect to the radio frequency-enabled devices in a network.

Abstract: The disclosure provides examples of systems and methods for determining locations of a number of radio frequency-enabled devices such as mobile devices and radio frequency-equipped beacons/luminaires within an indoor location. The radio frequency-enabled devices may be part of an indoor positioning system and/or content delivery system. The examples describe obtaining an angle of arrival (AoA) of the signals received by the respective radio frequency-enabled devices. The AOA data is used to identify the relative positions of the radio frequency-enabled devices as the mobile device moves about the indoor location. Upon comparing AOA measurements of the collected data related to a map of the location, the system may generate a data structure that may be presented graphically as a map of positions of the devices at the location. The described examples may enable a rapid commissioning process with respect to the radio frequency-enabled devices in a network.

Abstract: Devices in a wireless network, such as wirelessly networked lighting devices, utilize two different types of radios, e.g. implementing two or more protocols such as Bluetooth and WiFi. Such radios operate in overlapping frequency bands of the RF spectrum. Time Division Multiplexing (TDM) of the two types of radio operations mitigates interference between the protocols competing in the spectrum overlap. In the examples with lighting devices, a driver of the light source provides a data bus that may be used as an auxiliary communications channel to implement TDM access by the radios to the overlapping frequency bands.

Abstract: The disclosure provides examples of systems and methods for determining locations of a number of radio frequency-enabled devices such as mobile devices and radio frequency-equipped beacons/luminaires within an indoor location. The radio frequency-enabled devices may be part of an indoor positioning system and/or content delivery system. The examples describe obtaining an angle of arrival (AoA) of the signals received by the respective radio frequency-enabled devices. The AOA data is used to identify the relative positions of the radio frequency-enabled devices as the mobile device moves about the indoor location. Upon comparing AOA measurements of the collected data related to a map of the location, the system may generate a data structure that may be presented graphically as a map of positions of the devices at the location. The described examples may enable a rapid commissioning process with respect to the radio frequency-enabled devices in a network.

Abstract: Techniques are disclosed for locating an occupant within an area. The system includes a first sensor including a first plurality of pixels for receiving a thermal energy input from the occupant within a first field of view (FOV) and a second sensor including a second plurality of pixels for receiving the input within a second FOV. A first distance from the occupant to the first sensor is determined based on the input received by at least one pixel of the first plurality of pixels and a first sensor location from an origin. A second distance from the occupant to the second sensor is also determined based on the input received by at least one pixel of the second plurality of pixels and a second sensor location relative to the origin. A coordinate position for the occupant relative to the origin is determined based on the determined first and second distances.

Abstract: Examples of a system and a method for asset tracking are provided. The system includes wireless communication nodes in a space that receive a basic message including an asset tracking tag identifier and a basic message sequence number transmitted by an asset tracking tag. The wireless communication nodes measure a received basic message signal attribute, and transmit a node asset message including the asset tracking tag identifier, the basic message sequence number, a node identifier, and the measured signal attribute of the received basic message to an edge gateway. The edge gateway may receive the transmitted node asset message transmitted by each of some number of the wireless communication nodes and rank respective node identifiers extracted from the received node asset messages based the measured signal attribute. The edge gateway forwards an aggregated message to a fog gateway for obtaining an estimate of the location of the asset tracking tag.

Abstract: Techniques are disclosed for detecting changes in occupancy as well as the number of occupants within an area. Detection of one or more occupants entering or leaving the area may be accomplished using a sensor having a quantity of pixels. The pixels may be configured to receive thermal energy emitted from one or more objects present in the area, including from one or more occupants. In response to receiving the emitted thermal energy, the sensor may be configured to create thermal images of the area. These thermal images may include a plurality of thermal intensity values associated with one or more pixels of the sensor. Two or more thermal images can be compared to identify a change in thermal intensity values. A change in the occupancy of the area may be determined by based on the identified change in thermal intensity values.

Abstract: Techniques are disclosed for locating an occupant within an area. The system includes a first sensor including a first plurality of pixels for receiving a thermal energy input from the occupant within a first field of view (FOV) and a second sensor including a second plurality of pixels for receiving the input within a second FOV. A first distance from the occupant to the first sensor is determined based on the input received by at least one pixel of the first plurality of pixels and a first sensor location from an origin. A second distance from the occupant to the second sensor is also determined based on the input received by at least one pixel of the second plurality of pixels and a second sensor location relative to the origin. A coordinate position for the occupant relative to the origin is determined based on the determined first and second distances.