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Open AccessArticle

UCMAC: A Cooperative MAC Protocol for Underwater Wireless Sensor Networks

1
School of Electronics Engineering, Kyungpook National University, Daegu 41566, Korea
2
Oceanic IT Convergence Technology Research Center, Hoseo University, Asan 31499, Korea
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(6), 1969; https://doi.org/10.3390/s18061969
Received: 21 May 2018 / Revised: 13 June 2018 / Accepted: 19 June 2018 / Published: 19 June 2018
(This article belongs to the Section Sensor Networks)
This paper proposes a cooperative medium access control (MAC) protocol for underwater wireless sensor networks (UWSNs) named UCMAC, which fundamentally benefits from cooperative communication. In UCMAC, a source identifies cooperators and provides its destination with a list of the cooperators while also delineating their proximity to the destination. For erroneous reception of data packets, the destination then requests retransmission to the cooperators in a closest-one-first manner. A designated cooperator transmits the buffered data packet it has successfully overheard from the source or other cooperators. A signaling procedure and the various waiting times of the nodes are carefully designed to address the overheads that stem from cooperation. Through computer simulation, this paper evaluates UCMAC in terms of system throughput, latency, single-hop packet delivery ratio (PDR), and energy efficiency. The results show that UCMAC performs better than existing schemes, including MACA-U and CD-MACA. View Full-Text
Keywords: underwater wireless sensor network; automatic repeat request; medium access control; cooperative communication; spatial diversity; cooperative region; cooperative ARQ; cooperative MAC underwater wireless sensor network; automatic repeat request; medium access control; cooperative communication; spatial diversity; cooperative region; cooperative ARQ; cooperative MAC
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Kim, H.-W.; Im, T.H.; Cho, H.-S. UCMAC: A Cooperative MAC Protocol for Underwater Wireless Sensor Networks. Sensors 2018, 18, 1969.

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