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Future Internet 2018, 10(7), 65; https://doi.org/10.3390/fi10070065

Performance Analysis of Hybrid Optical–Acoustic AUV Swarms for Marine Monitoring

Department of Electronic Engineering, University of Rome Tor Vergata, 00133 Rome, Italy
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Received: 30 May 2018 / Revised: 6 July 2018 / Accepted: 7 July 2018 / Published: 10 July 2018
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Abstract

Autonomous Underwater Vehicles (AUVs) are assuming an important role in the monitoring and mapping of marine ecosystems, especially for their ability to explore harsh environments. AUV swarm can collect data operating autonomously for long periods enabling new applications in this field. However, the mission duration is usually limited also by the high power consumption required for acoustic transmissions. A new generation of devices complements the acoustic modem with an optical modem that can provide a communication channel with higher capacity and lower power consumption with respect to the acoustic channel. However, the optical link that uses the visible light is very sensitive to the water turbidity that can strongly limit the link coverage. In this paper, we evaluate the networking performances of the Venus vessel, a real AUV prototype equipped with an acoustical modem and an optical modem. The presented analysis aims to evaluate key system parameters allowing to select the best way to set up network communications according to the surrounding conditions (e.g., quality of water) and to the application requirements. Simulation results account for the case of ports or basins, where the water quality is poor and the use of the optical modem is strongly limited by distance. We evaluate system performance in terms of transmission delay in the network and we also provide a power–capacity trade-off. View Full-Text
Keywords: underwater; hybrid optical–acoustic communication; AUV underwater; hybrid optical–acoustic communication; AUV
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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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Lodovisi, C.; Loreti, P.; Bracciale, L.; Betti, S. Performance Analysis of Hybrid Optical–Acoustic AUV Swarms for Marine Monitoring. Future Internet 2018, 10, 65.

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