Changes

==Introduction==

==Introduction==

Precise GNSS tracking might be physically not possible in certain environments, where the GNSS signal is unable to reach the tracking device. One example of such environment might be the inside of a large industrial warehouse, where the GNSS signal is attenuated by it's walls. If the precise position of a vehicle, such as a forklift is needed to be tracked inside of it, other additional measures need to be taken. Teltonika indoor tracking solution ensures indoor positioning in such environments by utilising eye beacons. Eye Beacons are interchangeable with Eye Sensors; it works in the same way as an Eye Beacon while also providing additional features, such as magnetic field detection, temperature and humidity reading. All of which help ensure proper warehouse conditions to prevent damage of goods. However, for regular indoor positioning, it is recommended to use Eye Beacons, as they ensure a longer battery life.

Precise GNSS tracking might be physically not possible in certain environments, where the GNSS signal is unable to reach the tracking device. One example of such environment might be the inside of a large industrial warehouse, where the GNSS signal is attenuated by it's walls. If the precise position of a vehicle, such as a forklift is needed to be tracked inside of it, other additional measures need to be taken. Teltonika indoor tracking solution ensures indoor positioning in such environments by utilising eye beacons. Eye Beacons are interchangeable with Eye Sensors; it works in the same way as an Eye Beacon while also providing additional features, such as magnetic field detection, temperature and humidity reading. All of which help ensure proper warehouse conditions to prevent damage of goods. However, for regular indoor positioning, it is recommended to use Eye Beacons, as they ensure a longer battery life.

==Solution description==

==Solution description==

First, BLE beacons are set up in an inside space, their position will remain fixed and they will serve as a known location reference. These beacons periodically broadcast a signal which is unique for each beacon containing the beacon’s ID. All FM devices can detect this broadcasted signal, therefore, many  FM devices can utilise the set up beacons for positioning simultaneously. Once a FM device configured for the solution receives a signal from a beacon, the relationship between the strength of this received signal (RSSI-Received signal strength Indicator) and transmitted signal strength (which is a constant for each beacon), will be proportional to the distance between them, as radio waves propagate according to the inverse square law. With several beacons detected by the FM device and having calculated the distance to each of them, the position of the configured FM device can be approximated by a positioning algorithm, such as trilateration. These calculations are performed on the server side.

First, BLE beacons are set up in an inside space, their position will remain fixed and they will serve as a known location reference. These beacons periodically broadcast a signal which is unique for each beacon containing the beacon’s ID. All FM devices can detect this broadcasted signal, therefore, many  FM devices can utilise the set up beacons for positioning simultaneously. Once a FM device configured for the solution receives a signal from a beacon, the relationship between the strength of this received signal (RSSI-Received signal strength Indicator) and transmitted signal strength (which is a constant for each beacon), will be proportional to the distance between them, as radio waves propagate according to the inverse square law. With several beacons detected by the FM device and having calculated the distance to each of them, the position of the configured FM device can be approximated by a positioning algorithm, such as trilateration. These calculations are performed on the server side.