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Enhancing Received Signal Strength-Based Localization through Coverage Hole Detection and Recovery

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  • Shuangjiao Zhai
  • Zhanyong Tang
  • Dajin Wang
  • Qingpei Li
  • Zhanglei Li
  • Xiaojiang Chen
  • Dingyi Fang
  • Feng Chen
  • Zheng Wang
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Article number2075
<mark>Journal publication date</mark>2018
<mark>Journal</mark>Sensors
Issue number7
Volume18
Number of pages23
Publication statusPublished
Original languageEnglish

Abstract

In wireless sensor networks (WSNs), Radio Signal Strength Indicator (RSSI)-based
localization techniques have been widely used in various applications, such as intrusion detection, battlefield surveillance, and animal monitoring. One fundamental performance measure in those applications is the sensing coverage of WSNs. Insufficient coverage will significantly reduce the effectiveness of the applications. However, most existing studies on coverage assume that the
sensing range of a sensor node is a disk, and the disk coverage model is too simplistic for many localization techniques. Moreover, there are some localization techniques of WSNs whose coverage model is non-disk, such as RSSI-based localization techniques. In this paper, we focus on detecting and recovering coverage holes of WSNs to enhance RSSI-based localization techniques whose coverage model is an ellipse. We propose an algorithm inspired by Voronoi tessellation and Delaunay triangulation to detect and recover coverage holes. Simulation results show that our algorithm can recover all holes and can reach any set coverage rate, up to 100% coverage.