Date Added: Apr 2011
Wireless sensor networks share the spectrum with other wire-less technologies. Hence, in order to minimize the effects of external interference they must carefully choose the channels for packet transmissions and reception. The identification of the best channels is, however, non-trivial. In this paper the authors present and evaluate a new channel quality metric that is based on the availability of channels over time rather than on the average energy in channels. Wireless technologies have grown exponentially during the last decade and are increasingly more appealing for many applications. Many standardized technologies operate in crowded and lightly regulated ISM frequency bands.