You want to track your assets in any place whatsoever.
The asset is always surrounded by Bluetooth signals.
The smartphone fuses all available information sources:
- Periodically scanned for RSSI values
- Pedestrian Dead Reckoning with the smartphone’s gyroscope and accelerometer
- Particle Flow Filtering to strengthen the smartphone’s BLE measurements
- Non-navigable areas retrieved from the Manager.
How many beacons?
You will need a dense architecture of beacons (approximately 1 beacon per 40m²) to cover your tracks, so that the smartphone always detects at least 2 beacons.
Where to attach the beacons?
You can attach them to walls, furniture and the ceiling. Try avoiding metallic surfaces since BLE is a radio wave and easily rebounds on those kind of surfaces (multi-path effect), hence adding noise to the signal.
Wall crossing: since RSSI computation is one of the indoor location’s basics, thin or glass walls will not block the BLE signal enough, hence not preventing your smartphone to detect a beacon in another room.
Multi-path effect: explained above, BLE signal bounces on surfaces, especially metallic onces and creates noise.