Distributed sensing of spectrum occupancy and interference in outdoor 2.4 GHz Wi-Fi networks

摘要

≤ − 82dBm, a large number of Wi-Fi users more than can be attributed to the immediate surroundings of sensors, but a small set of them was dominant producing the bulk of spectrum occupancy and interference. In addition, at least 25% of these users were detected only once over the 5.5 hours measurement time span. The measurements showed spatial variations of the Wi-Fi environment over a small sensing area (21m-by-45m). We noted considerable non-homogeneity in the distribution of Wi-Fi interference at T