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Sensors 2018, 18(2), 501; doi:10.3390/s18020501

A Glider-Assisted Link Disruption Restoration Mechanism in Underwater Acoustic Sensor Networks

1
School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
2
College of Information Science and Technology, Hainan University, Haikou 570228, China
*
Authors to whom correspondence should be addressed.
Received: 19 December 2017 / Revised: 15 January 2018 / Accepted: 2 February 2018 / Published: 7 February 2018
(This article belongs to the Special Issue Advances and Challenges in Underwater Sensor Networks)
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Abstract

Underwater acoustic sensor networks (UASNs) have become a hot research topic. In UASNs, nodes can be affected by ocean currents and external forces, which could result in sudden link disruption. Therefore, designing a flexible and efficient link disruption restoration mechanism to ensure the network connectivity is a challenge. In the paper, we propose a glider-assisted restoration mechanism which includes link disruption recognition and related link restoring mechanism. In the link disruption recognition mechanism, the cluster heads collect the link disruption information and then schedule gliders acting as relay nodes to restore the disrupted link. Considering the glider’s sawtooth motion, we design a relay location optimization algorithm with a consideration of both the glider’s trajectory and acoustic channel attenuation model. The utility function is established by minimizing the channel attenuation and the optimal location of glider is solved by a multiplier method. The glider-assisted restoration mechanism can greatly improve the packet delivery rate and reduce the communication energy consumption and it is more general for the restoration of different link disruption scenarios. The simulation results show that glider-assisted restoration mechanism can improve the delivery rate of data packets by 15–33% compared with cooperative opportunistic routing (OVAR), the hop-by-hop vector-based forwarding (HH-VBF) and the vector based forward (VBF) methods, and reduce communication energy consumption by 20–58% for a typical network’s setting. View Full-Text
Keywords: underwater acoustics sensor networks; glider; sawtooth motion; link-disruption; restoration; network connectivity underwater acoustics sensor networks; glider; sawtooth motion; link-disruption; restoration; network connectivity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Jin, Z.; Wang, N.; Su, Y.; Yang, Q. A Glider-Assisted Link Disruption Restoration Mechanism in Underwater Acoustic Sensor Networks. Sensors 2018, 18, 501.

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