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A Mobile Anchor Node Assisted RSSI Localization Scheme in Underwater Wireless Sensor Networks.

Yanlong Sun1, Yazhou Yuan2, Qimin Xu3

  • 1Institute of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China. yanlongsun@stumail.ysu.edu.cn.

Sensors (Basel, Switzerland)
|October 30, 2019
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Summary

This study introduces a novel localization scheme for underwater wireless sensor networks (UWSNs) using a mobile anchor node. The method enhances location accuracy and reduces time by employing support vector regression and curve matching techniques.

Keywords:
RSSIlocalizationmobile anchor nodeunderwater wireless sensor networks (UWSNs)

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Area of Science:

  • Marine Engineering
  • Sensor Networks
  • Signal Processing

Background:

  • Underwater wireless sensor networks (UWSNs) face challenges in accurate and timely node localization.
  • Existing localization schemes often require multiple anchor node trajectories, increasing time and complexity.

Purpose of the Study:

  • To propose a mobile anchor node assisted RSSI localization scheme for UWSNs.
  • To improve location accuracy and reduce localization time in UWSNs.
  • To address limitations of existing localization methods in UWSNs.

Main Methods:

  • Utilizing support vector regression (SVR) for accurate projection estimation of sensor nodes onto the mobile anchor's trajectory.
  • Employing a curve matching method to determine the perpendicular distance from sensor nodes to the anchor's path.
  • Developing a single-trajectory approach for sensor node localization.

Main Results:

  • The SVR-based interpolation method enhances nonlinear regression accuracy with noisy data.
  • The curve matching method effectively calculates perpendicular distances, reducing estimation errors.
  • The proposed scheme achieves higher location accuracy in less time compared to existing methods.

Conclusions:

  • The developed UWSN localization scheme offers improved accuracy and efficiency.
  • The single-trajectory approach significantly reduces localization time.
  • This method provides a viable solution for precise underwater sensor node positioning.