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Optimal Routing for Time-Driven EH-WSN under Regular Energy Sources.

Sebastià Galmés1

  • 1Department of Mathematics and Computer Science, University of Balearic Islands, 07122 Palma de Mallorca, Spain. sebastia.galmes@uib.es.

Sensors (Basel, Switzerland)
|November 25, 2018
PubMed
Summary

For energy-harvesting wireless sensor networks (WSN), optimizing performance replaces maximizing lifetime. Minimum hop count routing maximizes node duty cycles, enhancing overall network performance in time-driven scenarios.

Keywords:
duty cycleenergy consumption modelenergy-harvesting wireless sensor networkmedium access control layerminimum hop countroutingshortest-path routingsolar radiationthroughput

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Network Engineering

Background:

  • Energy harvesting in wireless sensor networks (WSN) shifts design focus from network lifetime to performance optimization (delay, throughput).
  • Time-driven energy-harvesting WSN (EH-WSN) with regular energy sources present unique routing challenges.

Purpose of the Study:

  • To investigate routing strategies for time-driven EH-WSN under regular energy sources.
  • To determine the routing criterion that maximizes network performance by optimizing node duty cycles.

Main Methods:

  • Derivation of a general expression linking node duty cycle and traffic load in time-driven EH-WSNs.
  • Mathematical analysis to demonstrate that Minimum Hop Count (MHC) minimizes average network traffic load.
  • Numerical validation through simulations comparing MHC with other routing strategies.

Main Results:

  • Node duty cycle is inversely proportional to its traffic load.
  • The Minimum Hop Count (MHC) routing criterion minimizes average network traffic load.
  • MHC routing maximizes the average sustained duty cycle across nodes in EH-WSNs.

Conclusions:

  • Minimum Hop Count (MHC) is the optimal routing criterion for time-driven EH-WSNs with regular energy sources.
  • Prioritizing MHC in routing protocol development enhances EH-WSN performance.
  • This finding redefines routing objectives for energy-harvesting wireless networks.