Deconstructing Interference Relations in WiFi Networks
Wireless interference is the major cause of degradation of capacity in 802.11 wireless networks. This paper presents an approach to estimate the interference between nodes and links in a live wireless network by passive monitoring of wireless traffic. This does not require any controlled experiments, injection of probe traffic in the network, or even access to the network nodes. The approach requires deploying multiple sniffers across the network to capture wireless traffic traces. These traces are then analyzed to infer the interference relations between nodes and links.