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Energy-Aware Spectrum Sensing in Cognitive Wireless Sensor Networks: a Cross Layer Approach
KTH, Skolan för informations- och kommunikationsteknik (ICT), Kommunikation: Infrastruktur och tjänster (Stängd 20120101), Kommunikationssystem, CoS (stängd 2012-01-01).
KTH, Skolan för informations- och kommunikationsteknik (ICT), Kommunikation: Infrastruktur och tjänster (Stängd 20120101), Kommunikationssystem, CoS (stängd 2012-01-01).ORCID-id: 0000-0003-4986-6123
2010 (engelsk)Inngår i: IEEE Wireless Communications and Networking Conference, WCNC, NEW YORK: IEEE , 2010Konferansepaper, Publicerat paper (Fagfellevurdert)
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.

sted, utgiver, år, opplag, sider
NEW YORK: IEEE , 2010.
Serie
2010 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC 2010)
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-101633DOI: 10.1109/WCNC.2010.5506383ISI: 000299203101072Scopus ID: 2-s2.0-77955048416OAI: oai:DiVA.org:kth-101633DiVA, id: diva2:549601
Konferanse
IEEE Wireless Communications and Networking Conference (WCNC)
Merknad

QC 20120905

Tilgjengelig fra: 2012-09-05 Laget: 2012-08-30 Sist oppdatert: 2016-12-22bibliografisk kontrollert

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