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Energy-aware exploitation of white spaces in the time domain for wireless sensor networks
KTH, School of Information and Communication Technology (ICT), Communication: Services and Infrastucture (Closed 20120101), Communication Systems, CoS (closed 2012-01-01). KTH, School of Information and Communication Technology (ICT), Centres, Center for Wireless Systems, Wireless@kth.
2010 (English)In: Proceedings of the 2010 7th International Symposium on Wireless Communication Systems, ISWCS'10, 2010, 981-985 p.Conference paper (Refereed)
Abstract [en]

Low power communications of sensor nodes operating in unlicensed bands are easily corrupted by transmissions of collocated wireless terminals whose interference can induce packet losses and consequently increase energy consumption of sensor devices. Dynamic spectrum access mechanisms can mitigate these problems however the energy aware design of these access schemes is a challenging task. In this paper we consider an energy constrained system comprising two sensor nodes that avoid interference by exploiting spectrum opportunities in the time domain. Using the distributions of idle period duration obtained during a measurement campaign we show how it is possible to design the access scheme deployed by sensors in an energy efficient manner. We compare different spectrum sensing strategies, showing that per-packet sensing results in significant energy overhead. We further provide a way for dimensioning the size of transmitted packets. Simulation results show that our approach outperforms other access strategies and allows to reduce energy consumption of 20 to 90 percent depending on channel conditions.

Place, publisher, year, edition, pages
2010. 981-985 p.
Keyword [en]
Access schemes, Channel conditions, Dynamic spectrum access, Energy aware, Energy consumption, Energy efficient, Energy-aware design, Energy-constrained, Low-power communication, Measurement campaign, Sensor device, Simulation result, Spectrum sensing, Time domain, White space, Wireless terminals
National Category
Communication Systems
URN: urn:nbn:se:kth:diva-150062DOI: 10.1109/ISWCS.2010.5624387ScopusID: 2-s2.0-78650078283ISBN: 978-142446316-9OAI: diva2:742199
2010 7th International Symposium on Wireless Communication Systems, ISWCS'10, 19 September 2010 through 22 September 2010, York, United Kingdom

QC 20140901

Available from: 2014-09-01 Created: 2014-08-29 Last updated: 2014-09-01Bibliographically approved

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Stabellini, Luca
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Communication Systems, CoS (closed 2012-01-01)Center for Wireless Systems, Wireless@kth
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