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  • Research Article
  • Open Access

Curvature of Indoor Sensor Network: Clustering Coefficient

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EURASIP Journal on Wireless Communications and Networking20092008:213185

  • Received: 14 June 2008
  • Accepted: 18 November 2008
  • Published:


We investigate the geometric properties of the communication graph in realistic low-power wireless networks. In particular, we explore the concept of the curvature of a wireless network via the clustering coefficient. Clustering coefficient analysis is a computationally simplified, semilocal approach, which nevertheless captures such a large-scale feature as congestion in the underlying network. The clustering coefficient concept is applied to three cases of indoor sensor networks, under varying thresholds on the link packet reception rate (PRR). A transition from positive curvature ("meshed" network) to negative curvature ("core concentric" network) is observed by increasing the threshold. Even though this paper deals with network curvature per se, we nevertheless expand on the underlying congestion motivation, propose several new concepts (network inertia and centroid), and finally we argue that greedy routing on a virtual positively curved network achieves load balancing on the physical network.


  • Wireless Network
  • Geometric Property
  • System Application
  • Cluster Coefficient
  • Full Article

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Authors’ Affiliations

Department of Electrical Engineering-Systems, University of Southern California, Los Angeles, CA 90089-2563, USA


© F. Ariaei et al. 2008

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.