Sensors 2013, 13(11), 15385-15408; https://doi.org/10.3390/s131115385
Throughput and Energy Efficiency of a Cooperative Hybrid ARQ Protocol for Underwater Acoustic Sensor Networks
1
Department of Electronics and Communication Engineering, NIT Durgapur, Durgapur 713209, India
2
School of Electronics Engineering, Kyungpook National University, Daegu 702-701, Korea
*
Author to whom correspondence should be addressed.
Received: 26 September 2013 / Revised: 4 November 2013 / Accepted: 4 November 2013 / Published: 8 November 2013
(This article belongs to the Section Sensor Networks)
Abstract
Due to its efficiency, reliability and better channel and resource utilization, cooperative transmission technologies have been attractive options in underwater as well as terrestrial sensor networks. Their performance can be further improved if merged with forward error correction (FEC) techniques. In this paper, we propose and analyze a retransmission protocol named Cooperative-Hybrid Automatic Repeat reQuest (C-HARQ) for underwater acoustic sensor networks, which exploits both the reliability of cooperative ARQ (CARQ) and the efficiency of incremental redundancy-hybrid ARQ (IR-HARQ) using rate-compatible punctured convolution (RCPC) codes. Extensive Monte Carlo simulations are performed to investigate the performance of the protocol, in terms of both throughput and energy efficiency. The results clearly reveal the enhancement in performance achieved by the C-HARQ protocol, which outperforms both CARQ and conventional stop and wait ARQ (S&W ARQ). Further, using computer simulations, optimum values of various network parameters are estimated so as to extract the best performance out of the C-HARQ protocol. View Full-TextKeywords:
automatic repeat request; cooperative transmission; underwater acoustic sensor network; RCPC codes
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MDPI and ACS Style
Ghosh, A.; Lee, J.-W.; Cho, H.-S. Throughput and Energy Efficiency of a Cooperative Hybrid ARQ Protocol for Underwater Acoustic Sensor Networks. Sensors 2013, 13, 15385-15408.