Influence of the the Distance between Bluetooth 2.0 Nodes and Their Link Mode with the Communication Delay

In this paper, the relationship of the distance between Bluetooth 2.0 nodes and their link mode with the delay in a monitoring wireless network is analyzed. The carried out measurements have demonstrated that within medium distances, from 6 to 24 meters, the overall time delay keeps nearly constant, but RSSI reading changes significantly. There has also been estimated the time delay each communication hop adds to the overall delay for some link modes a Bluetooth node can be in, i.e., active, sniff and park. These measured low values for time delay in this Bluetooth 2.0 wireless network allow some real time applications as, for example, those in the areas of avionics, domotics, health or industrial monitoring.