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A Fuzzy Logic-Based Directional Charging Scheme for Wireless Rechargeable Sensor Networks.

Yuhan Ma1, Chao Sha1, Yue Wang1

  • 1School of Computer Science, Software and Cyberspace Security, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.

Sensors (Basel, Switzerland)
|August 10, 2024
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Summary
This summary is machine-generated.

This study introduces a Fuzzy Logic-based Directional Charging (FLDC) scheme to enhance energy replenishment in Wireless Rechargeable Sensor Networks (WRSNs). FLDC optimizes mobile charger routes and charging directions for improved energy efficiency and network lifetime.

Keywords:
charging efficiencydirectional chargingfuzzy logic systemstaying point optimizationwireless rechargeable sensor networks

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Network Engineering

Background:

  • Wireless Power Transfer (WPT) is crucial for extending the lifespan of Wireless Rechargeable Sensor Networks (WRSNs).
  • Traditional omnidirectional recharging is inefficient due to energy waste, while directional recharging offers higher efficiency but limited node service per cycle.
  • Optimizing mobile charger (MC) path, service order, and charging orientation is critical for effective energy replenishment in directional WPT.

Purpose of the Study:

  • To propose a Fuzzy Logic-based Directional Charging (FLDC) scheme for optimizing energy replenishment in WRSNs.
  • To enhance both the energy replenishment benefit for sensor nodes and the energy efficiency of the mobile charger.

Main Methods:

  • Dividing the WRSN into hexagonal grids for defined charging regions.
  • Employing a double-layer fuzzy logic system to dynamically determine MC service sequence and node/grid priorities.
  • Optimizing MC staying point locations to minimize travel distance within grids.
  • Adjusting discretized charging directions at each staying point to maximize charging efficiency.

Main Results:

  • The FLDC scheme effectively determines the MC's trajectory and charging sequence.
  • Optimization of staying points significantly reduces the total charging distance.
  • Adjusted charging directions lead to improved overall energy transfer efficiency.
  • Simulation results demonstrate superior performance of FLDC in node charging benefit and MC energy efficiency.

Conclusions:

  • The proposed FLDC scheme offers an effective solution for directional charging in WRSNs.
  • FLDC balances the need for efficient energy transfer with the constraints of mobile charger operation.
  • This approach contributes to extending network lifetime and operational efficiency in WRSNs.