Optical-acoustic hybrid network toward real-time video streaming for mobile underwater sensors

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Underwater sensor networking is generally regarded as an emerging technology in conducting oceanic exploration and research in an automated and effective manner. As underwater operations become more sophisticated and Autonomous Underwater Vehicles (AUVs) become more advanced, there is an increasing demand for real-time video streaming from AUVs to remotely steer them and to probe the environment. However, real-time video streaming requires high bandwidth. To help overcome this obstacle, we propose a hybrid solution that combines acoustic and optical communications. In our hybrid solution, optics provide good quality real-time video streaming. Acoustic maintains a "thin" channel for the network topology and transmission control. The acoustic channel is also used for still frame video delivery when the optical channel fails. In particular, we enable optical communications by acoustic-assisted alignment and use acoustic communications as a backup when the optical signal is interrupted. The main contribution of this research is to enable reliable, real-time video streaming without underwater optical cables. Another important contribution is the smooth transition between the acoustic and optical video delivery mode, by leveraging image processing algorithms to compress the key frames before transmitting them on the acoustic channel. (C) 2018 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2019-02
Language
English
Article Type
Article
Citation

AD HOC NETWORKS, v.83, pp.1 - 7

ISSN
1570-8705
DOI
10.1016/j.adhoc.2018.08.020
URI
http://hdl.handle.net/10203/248977
Appears in Collection
IE-Journal Papers(저널논문)
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