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Mobile Charging Strategy for Wireless Rechargeable Sensor Networks.

Tzung-Shi Chen1, Jen-Jee Chen2, Xiang-You Gao1

  • 1Department of Computer Science and Information Engineering, National University of Tainan, Tainan 700301, Taiwan.

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|January 11, 2022
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Summary
This summary is machine-generated.

Dual-side charging strategies for mobile robots in wireless rechargeable sensor networks (WRSNs) significantly reduce traversal distance, energy use, and completion time. These methods enhance network lifetime and efficiency.

Keywords:
Voronoi diagramenergy efficiencymobile charging robottraveling salesman problemwireless rechargeable sensor networks

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Area of Science:

  • Wireless Sensor Networks
  • Robotics
  • Energy Management

Background:

  • Sensor energy depletion limits wireless sensor network (WSN) task completion.
  • Wireless rechargeable sensor networks (WRSNs) extend network lifetime using mobile charging robots (MR).
  • MRs in WRSNs charge sensors and collect data simultaneously, requiring efficient path planning.

Purpose of the Study:

  • To propose dual-side charging strategies for MR traversal planning in WRSNs.
  • To minimize MR traversal path length, energy consumption, and completion time.
  • To enhance overall WRSN efficiency and operational longevity.

Main Methods:

  • Development of dual-side charging strategies enabling simultaneous charging and data collection from sensors on both sides of the MR path.
  • Construction of MR traversal paths based on a power diagram considering sensor remaining power and inter-sensor distances.
  • Integration of a clustering-based approach to further optimize MR movement, charging energy, and round completion time.

Main Results:

  • Proposed dual-side charging strategies significantly outperform baseline strategies in reducing MR traversal distance.
  • Substantial energy savings were achieved through optimized charging and data collection.
  • Completion time for MR tasks in WRSNs was demonstrably reduced, with or without clustering.

Conclusions:

  • Dual-side charging strategies offer a superior approach to MR traversal planning in WRSNs.
  • The integration of clustering further enhances efficiency in terms of distance, energy, and time.
  • The proposed methods effectively address energy depletion challenges, prolonging WRSN operational lifetime.