Impact of Link Unreliability and Asymmetry on the Quality of Connectivity in Large-scale Sensor Networks
Identifieur interne : 000240 ( Ncbi/Checkpoint ); précédent : 000239; suivant : 000241Impact of Link Unreliability and Asymmetry on the Quality of Connectivity in Large-scale Sensor Networks
Auteurs : Yanjun Li ; Ye-Qiong Song ; René Schott ; Zhi Wang ; Youxian SunSource :
- Sensors (Basel, Switzerland) [ 1424-8220 ] ; 2008.
Abstract
Connectivity is a fundamental issue in research on wireless sensor networks. However, unreliable and asymmetric links have a great impact on the global quality of connectivity (QoC). By assuming the deployment of nodes a homogeneous Poisson point process and eliminating the border effect, this paper derives an explicit expression of node non-isolation probability as the upper bound of one-connectivity, based on an analytical link model which incorporates important parameters such as path loss exponent, shadowing variance of channel, modulation, encoding method etc. The derivation has built a bridge over the local link property and the global network connectivity, which makes it clear to see how various parameter impact the QoC. Numerical results obtained further confirm the analysis and can be used as reference for practical design and simulation of wireless ad hoc and sensor networks. Besides, we find giant component size a good relaxed measure of connectivity in some applications that do not require full connectivity.
Url:
DOI: 10.3390/s8106674
PubMed: NONE
PubMed Central: 3707473
Affiliations:
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PMC:3707473Le document en format XML
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<affiliation><nlm:aff id="af2-sensors-08-06674"> LORIA-Nancy University, Villers-lès-Nancy, France / Campus Scientifique, B.P. 239 - 54506 Vandoeuvre-lès-Nancy, France; E-Mails:<email>song@loria.fr</email>
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<front><div type="abstract" xml:lang="en"><p>Connectivity is a fundamental issue in research on wireless sensor networks. However, unreliable and asymmetric links have a great impact on the global quality of connectivity (QoC). By assuming the deployment of nodes a homogeneous Poisson point process and eliminating the border effect, this paper derives an explicit expression of node non-isolation probability as the upper bound of one-connectivity, based on an analytical link model which incorporates important parameters such as path loss exponent, shadowing variance of channel, modulation, encoding method etc. The derivation has built a bridge over the local link property and the global network connectivity, which makes it clear to see how various parameter impact the QoC. Numerical results obtained further confirm the analysis and can be used as reference for practical design and simulation of wireless ad hoc and sensor networks. Besides, we find giant component size a good relaxed measure of connectivity in some applications that do not require full connectivity.</p>
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<name sortKey="Song, Ye Qiong" sort="Song, Ye Qiong" uniqKey="Song Y" first="Ye-Qiong" last="Song">Ye-Qiong Song</name>
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