Journal of Hebei University(Natural Science Edition) ›› 2023, Vol. 43 ›› Issue (5): 553-560.DOI: 10.3969/j.issn.1000-1565.2023.05.015

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Coverage optimization for WSNs based on uncovered vertices

YIN Boran1,MA Jun1, 2,CHEN Bohang1,WANG Hongchen1   

  1. 1. School of Physics and Electronic Information Engineering, Qinghai Normal University, Xining 810008, China; 2. Key Laboratory of Internet of Things, Institute of Plateau Science and Sustainable Development, Qinghai Normal University, Xining 810008, China
  • Received:2022-11-20 Online:2023-09-25 Published:2023-10-25

Abstract: In order to further improve the coverage of wireless sensor networks(WSNs)and reduce the number of mobile deployment iterations, this work improves the virtual force between sensors and the virtual force algorithm of Tyson polygon vertices. In view of the discontinuity of the mathematical model of the existing virtual force algorithm, Hookes Law is used heve as the model, so that the virtual force on the sensor is linearly related to the distance. When the distance between sensors is greater than 2RS, virtual force is applied to the nearest sensor node by using the uncovered vertices of Tyson polygons. At the same time, this algorithm lets the step size of the virtual force determine the movement step size of the sensor. The simulation results show that this algorithm can increase the coverage from 93.5% to 99.7%, and reduce the number of iterations to less than 25%. The algorithm in this paper plays an active role in the coverage research of homogeneous wireless sensor networks.

Key words: thiessen polygons, mobile wireless sensor, virtual force algorithm, deployment optimization strategy

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