Experimental comparison of frequency hopping techniques for 802.15.4-based sensor networks
2010 (English)In: UBICOMM 2010 - 4th International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies, 2010, 110-116 p.Conference paper (Refereed)
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 we present the experimental evaluation of three different hopping schemes: we implement a traditional hopping algorithm and two adaptive variations on TMote Sky sensor motes and quantify their energy performance under different channel conditions. We also compare the effectiveness of these three hopping techniques against the one of a communication scheme making use of a single channel. Our results, obtained considering a two-node topology, indicate that our previously proposed utility based adaptive frequency hopping approach is the most effective in avoiding interference and can significantly reduce the overall energy consumption despite its higher complexity. The performed experiments also show that even though reliable single-channel communication might be possible, by using frequency hopping sensors can limit the performance degradation induced by interference while avoiding the energy overhead introduced by the spectrum sensing algorithms that nodes have to use for identifying clear channels.
Place, publisher, year, edition, pages
2010. 110-116 p.
Adaptive frequency hopping, Coexistence in unlicensed bands, Frequency hopping, Interference mitigation, Wireless sensor networks
IdentifiersURN: urn:nbn:se:kth:diva-148917ScopusID: 2-s2.0-84881560219ISBN: 978-161208100-7OAI: oai:DiVA.org:kth-148917DiVA: diva2:737951
4th International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies, UBICOMM 2010, 25 October 2010 through 30 October 2010, Florence, Italy
QC 201408142014-08-142014-08-142014-08-14Bibliographically approved