Reliable Networks with Unreliable Sensors

  • Srikanth Sastry
  • Tsvetomira Radeva
  • Jianer Chen
  • Jennifer L. Welch
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6522)

Abstract

Wireless sensor networks (WSNs) deployed in hostile environments suffer from a high rate of node failure. We investigate the effect of such failure rate on network connectivity. We provide a formal analysis that establishes the relationship between node density, network size, failure probability, and network connectivity. We show that as network size and density increase, the probability of network partitioning becomes arbitrarily small. We show that large networks can maintain connectivity despite a significantly high probability of node failure. We derive mathematical functions that provide lower bounds on network connectivity in WSNs. We compute these functions for some realistic values of node reliability, area covered by the network, and node density, to show that, for instance, networks with over a million nodes can maintain connectivity with a probability exceeding 99% despite node failure probability exceeding 57%.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Srikanth Sastry
    • 1
  • Tsvetomira Radeva
    • 2
  • Jianer Chen
    • 1
  • Jennifer L. Welch
    • 1
  1. 1.Department of Computer Science and EngineeringTexas A&M UniversityCollege StationUSA
  2. 2.Computer Science and Artificial Intelligence LaboratoryMassachusetts Institute of TechnologyCambridgeUSA

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