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Static Worst-Case Energy and Lifetime Estimation of Wireless Sensor Networks

  • Liu, Yu (Department of Electrical and Computer Engineering, Southern Illinois University Carbondale) ;
  • Zhang, Wei (Department of Electrical and Computer Engineering, Southern Illinois University Carbondale) ;
  • Akkaya, Kemal (Department of Computer Science, Southern Illinois University Carbondale)
  • Received : 2010.02.25
  • Accepted : 2010.06.08
  • Published : 2010.06.30

Abstract

With the advance of computer and communication technologies, wireless sensor networks (WSNs) are increasingly used in many aspects of our daily life. However, since the battery lifetime of WSN nodes is restricted, the WSN lifetime is also limited. Therefore, it is crucial to determine this limited lifetime in advance for preventing service interruptions in critical applications. This paper proposes a feasible static analysis approach to estimating the worstcase lifetime of a WSN. Assuming known routes with a given sensor network topology and SMAC as the underlying MAC protocol, we statically estimate the lifetime of each sensor node with a fixed initial energy budget. These estimations are then compared with the results obtained through simulation which run with the same energy budget on each node. Experimental results of our research on TinyOS applications indicate that our approach can safely and accurately estimate worst-case lifetime of the WSN. To the best of our knowledge, our work is the first one to estimate the worst-case lifetime of WSNs through a static analysis method.

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