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Sensors 2016, 16(10), 1626; doi:10.3390/s16101626

Data-Gathering Scheme Using AUVs in Large-Scale Underwater Sensor Networks: A Multihop Approach

School of Electronics Engineering, Kyungpook National University, Daegu 702-701, Korea
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Academic Editor: Leonhard Reindl
Received: 31 May 2016 / Revised: 17 September 2016 / Accepted: 21 September 2016 / Published: 30 September 2016
(This article belongs to the Section Sensor Networks)
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Abstract

In this paper, we propose a data-gathering scheme for hierarchical underwater sensor networks, where multiple Autonomous Underwater Vehicles (AUVs) are deployed over large-scale coverage areas. The deployed AUVs constitute an intermittently connected multihop network through inter-AUV synchronization (in this paper, synchronization means an interconnection between nodes for communication) for forwarding data to the designated sink. In such a scenario, the performance of the multihop communication depends upon the synchronization among the vehicles. The mobility parameters of the vehicles vary continuously because of the constantly changing underwater currents. The variations in the AUV mobility parameters reduce the inter-AUV synchronization frequency contributing to delays in the multihop communication. The proposed scheme improves the AUV synchronization frequency by permitting neighboring AUVs to share their status information via a pre-selected node called an agent-node at the static layer of the network. We evaluate the proposed scheme in terms of the AUV synchronization frequency, vertical delay (node→AUV), horizontal delay (AUV→AUV), end-to-end delay, and the packet loss ratio. Simulation results show that the proposed scheme significantly reduces the aforementioned delays without the synchronization time-out process employed in conventional works. View Full-Text
Keywords: Underwater Sensor Networks; Autonomous Underwater Vehicle; Voronoi region; tour-point; data-gathering Underwater Sensor Networks; Autonomous Underwater Vehicle; Voronoi region; tour-point; data-gathering
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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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MDPI and ACS Style

Khan, J.U.; Cho, H.-S. Data-Gathering Scheme Using AUVs in Large-Scale Underwater Sensor Networks: A Multihop Approach. Sensors 2016, 16, 1626.

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