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Energy-Aware Spectrum Sensing in Cognitive Wireless Sensor Networks: a Cross Layer Approach
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), Communication: Services and Infrastucture (Closed 20120101), Communication Systems, CoS (closed 2012-01-01).ORCID iD: 0000-0003-4986-6123
2010 (English)In: IEEE Wireless Communications and Networking Conference, WCNC, NEW YORK: IEEE , 2010Conference paper, Published paper (Refereed)
Abstract [en]

Low-power transmissions of sensor nodes are easily corrupted by interference generated by co-located wireless terminals that leading to packet losses might increase energy consumption and result in unreliable communications. Dynamic spectrum access mechanisms can mitigate these problems allowing cognitive sensor devices to sense the spectrum and access the wireless medium in an opportunistic way. With this respect, energy efficient algorithms for spectrum sensing have to be designed in order to meet the power constraints of wireless sensor networks. In this paper we consider an energy constrained system comprising two sensor nodes that avoid interference by exploiting spectrum holes in the time domain. We design the algorithm used for spectrum sensing so as to minimize the average energy required for the successful delivery of a packet. While carrying our this task we adopt a cross layer approach that accounts for the average channel occupancy and the power of interfering transmissions at the physical layer as well as for the size of packets used by sensors at the transport layer. Our results show that accounting for the short length of packets commonly used in sensor networks can significantly improve energy efficiency leading to gains of up to 50% if compared to other spectrum sensing algorithms envisaged in the literature.

Place, publisher, year, edition, pages
NEW YORK: IEEE , 2010.
Series
2010 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC 2010)
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-101633DOI: 10.1109/WCNC.2010.5506383ISI: 000299203101072Scopus ID: 2-s2.0-77955048416OAI: oai:DiVA.org:kth-101633DiVA: diva2:549601
Conference
IEEE Wireless Communications and Networking Conference (WCNC)
Note

QC 20120905

Available from: 2012-09-05 Created: 2012-08-30 Last updated: 2016-12-22Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
  • html
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  • asciidoc
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