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Residual Energy Estimation-Based MAC Protocol for Wireless Powered Sensor Networks.

Sol-Bee Lee1, Jung-Hyok Kwon1, Eui-Jik Kim1

  • 1School of Software, Hallym University, 1 Hallymdaehak-gil, Chuncheon 24252, Gangwon-do, Korea.

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Summary

This new protocol, REE-MAC, improves wireless powered sensor networks by efficiently scheduling energy harvesting and ensuring fair data access. It reduces control message overhead for better performance in sensor device networks.

Keywords:
Internet of Thingsenergy harvestingout-of-band approachresidual energy estimationwireless power transferwireless powered sensor network

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Wireless Communication

Background:

  • Wireless Powered Sensor Networks (WPSNs) face challenges in managing energy harvesting and ensuring fair data transmission opportunities.
  • Existing Medium Access Control (MAC) protocols often incur significant overhead from control messages for energy management.

Purpose of the Study:

  • To introduce a novel Residual Energy Estimation-based Medium Access Control (REE-MAC) protocol for WPSNs.
  • To reduce control message overhead and enhance fairness in sensor device data transmission opportunities.
  • To optimize the scheduling of energy harvesting operations in WPSNs.

Main Methods:

  • The REE-MAC protocol utilizes two simultaneous superframes: a wireless energy transfer (WET) superframe and a wireless information transfer (WIT) superframe.
  • A central coordinator estimates residual energy changes (consumption and harvesting) for each sensor device at the start of each superframe.
  • Dedicated Power Slots (DPSs) are allocated within the WET superframe based on determined charging priorities.

Main Results:

  • Simulation results show REE-MAC outperforms existing WPSN MAC protocols in terms of harvested energy.
  • REE-MAC significantly reduces the average freezing time for sensor devices.
  • The protocol demonstrates superior fairness in providing data transmission opportunities to sensor devices.

Conclusions:

  • REE-MAC effectively manages residual energy for improved performance in WPSNs.
  • The proposed protocol offers a more efficient and fairer approach to energy harvesting and data transmission scheduling.
  • REE-MAC presents a promising solution for enhancing the operational efficiency of wireless powered sensor networks.