Experimental Testing of Received Signal Strength in Indoor Positioning System

Positioning of persons and entities is well known in the outdoor environment through Global Positioning System technology. However, nowadays, the issue of positioning is also a challenge in indoor environments, which are characterised by the presence of a high number of people at the time of operation, and to increase safety or optimise processes, the movement and position of people needs to be monitored. In addition to the movement of people, it is also possible to monitor the location of equipment or materials, which makes it possible to determine their availability and thus increase operational efficiency. However, GPS technology is not suitable for the needs of tracking the movement of people and entities in indoor environments due to the impermeability of signals through building structures. However, there are several technologies that allow the location of people and entities in indoor environments, such as Wi-Fi, Bluetooth, RFID, Ultrawideband or IR. This paper focuses on the investigation of an indoor positioning system based on Bluetooth Low Energy beacons in confined space conditions in terms of signal strength quality.