Experimental Comparison of Frequency Hopping Techniques for 802.15.4-Based Sensor Networks
Frequency hopping communication schemes represent an attractive alternative for interconnecting low power wireless sensor nodes operating in unlicensed bands. The use of multiple communication channels can in fact mitigate the negative effects of interference induced by collocated wireless networks and potentially results in improved reliability. With this respect, quite a few adaptive variations, aiming at improving the resilience of frequency hopping toward interference have been recently proposed. In this paper, the authors present the experimental evaluation of three different hopping schemes: they implement a traditional hopping algorithm and two adaptive variations on TMote Sky sensor motes and quantify their energy performance under different channel conditions.