Disclosed herein is a system that provides location and information communication including a beacon, wherein the beacon transmits both information and data related to the beacon's relevant range and a receiving device, wherein the receiving device determines whether the transmitted information is relevant based on the received signal strength and the transmitted data related to relevant range.

Beacon systems include a beacon including a transmitter, a processor, and a sensor for collecting sensor data, wherein the beacon broadcasts a beacon message comprising informational data based on a value of the sensor data and data regarding a minimum received signal strength for the relevance of the beacon message. The beacon system may include a receiving device, wherein the receiving device comprises a processor and an alarm adapted to be triggered by the beacon message, wherein the processor determines a relevance of the beacon message by comparing the minimum received signal strength for the relevance of the beacon message to an actual received signal strength of the beacon message, wherein, if the actual received signal strength is greater than or equal to the minimum received signal strength, the receiving device is within a range of relevance and the alarm is triggered.

An underwater communications network may include spaced apart nodes on a bottom of a body of water. The underwater communications network may also include fiber optic cabling connecting the spaced apart nodes. Each node may include a frame, a node short-range navigation device carried by the frame, and an unmanned underwater vehicle (UUV) carried by the frame after delivering a fiber optic cable along a navigation path from an adjacent node. The UUV may be configured to cooperate with the node short-range navigation device during an end portion of the navigation path adjacent the frame.

Methods of determining beacon relevance include receiving a beacon broadcast resulting in a received beacon broadcast, wherein the beacon broadcast comprises a range of relevance and informational data, determining a strength of the received beacon broadcast, comparing the range of relevance with the strength of the received beacon broadcast, and identifying the beacon broadcast as relevant if the strength of the received beacon broadcast exceeds the range of relevance.

A system for impact prevention using mobile beacons includes a receiving device associated with a user, the receiving device comprising a receiver adapted to receive a beacon broadcast from one or more of a plurality of beacons, the beacon broadcast comprising informational data and a range of relevance, a processor, and an alarm, wherein when the processor determines that the receiving device is within the range of relevance, the alarm is activated.

A system includes radio frequency (RF) communication devices, for example, in luminaires, located in a service area offering a location determination service, and a portable device used in commissioning the communication devices. The communication devices transmit a primary location determination system's RF signals for receipt by the portable device. The portable device determines its location using a secondary system. The RF communication devices' transmitted RF signals include an identifier. A received signal strength indication (RSSI) of each signal received by the portable device is measured, and stored with an estimate of the portable device's corresponding location. The portable device is moved to another location to measure RSSI of RF signals. When the number of measurements or number of locations is sufficient, the locations of each of the respective luminaires or communication devices may be determined using the RSSI values and the portable device's estimated indiscriminate location.

A portable-device real-time locating system (RTLS) having portable devices and in-room radio-transmitting beacons. To determine which room a portable device is in, beacons broadcast radio transmissions containing motion-status information about recent history of perceived motion in a room as determined from a motion sensor in the beacon. Portable devices calculate received signal strength indications (RSSI) from nearby beacons, motion-in-room status sensed and reported by those beacons, plus their own motion status based on a portable-device-based accelerometer. A series of portable-device steps estimates the room-location of the portable based on a combination of RSSI analysis, and a comparison of portable-device-motion history to the perceived and recorded motion-status in a room. The analysis of portable-device-motion history and motion-in-room status produces a better estimate of room-level location of the portable device than an RSSI estimate can produce alone.

The prevent invention provides a navigation method, used in a navigation system. The navigation system includes a server device, a mobile electronic device, and a plurality of light emitting modules detachably secured in a plurality of lamp-holders. The navigation method includes the following steps: the plurality of light emitting modules continuously transmitting a wireless signal with identification information; the mobile electronic device receiving the identification information and respectively determining a distances between the mobile electronic device and the light emitting modules transmitting the identification information, and storing the distances as distance information; the electronic device determining a position of the mobile electronic device based on the identification information, the distance information, the map information and flag information stored in the server device.

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.

A Bluetooth beacon for a luminaire assembly includes a module and an antenna associated with the module. The Bluetooth beacon is monted such that the antenna is communicatively visible from a light emitting side of the luminaire assembly. The Bluetooth beacon is configured to provide a signal extending a predetermined distance from the luminaire assembly such that a Bluetooth receiver on a user device can receive a signal from the Bluetooth beacon.