NDLI: Impact of real modem characteristics on practical underwater MAC design

Content Provider	IEEE Xplore Digital Library
Author	Lina Pu Yu Luo Yibo Zhu Zheng Peng Jun-Hong Cui Khare, S. Lei Wang Benyuan Liu
Copyright Year	2012
Description	Author affiliation: Electrical & Computer Engineering, University of Connecticut, Storrs, CT 06029 (Khare, S.; Lei Wang) \|\| Computer Science & Engineering Department, University of Connecticut, Storrs, CT 06029 (Lina Pu; Yu Luo; Yibo Zhu; Zheng Peng; Jun-Hong Cui) \|\| Department of Computer Science, University of Massachusetts, Lowell, MA 01854 (Benyuan Liu)
Abstract	The grand challenges posed by the adverse acoustic channels have been extensively studied in medium access control (MAC) design for underwater acoustic networks (UWANs). In recent years a bunch of MAC protocols have been proposed and analyzed to address the long propagation delay and constraint power supply problems. However, the challenges from the real acoustic modem characteristics are still neglected in the current research. Based on our experiments and sea trial tests with different modems — Teledyne Benthos modem, WHOI MicroModem and high speed UConn OFDM modem, we discover two important real system issues and discuss their significant effect on MAC design in UWANs. Experiment and simulation results reveal that the long preamble sequence feature of acoustic modems harm most existing MAC protocols with short packets, such as acknowledgment, notification, reservation used control packets. Other than reservation based methods are vulnerable to the long transmission time and busy terminal problem, the random access based protocols can benefit from them. As a result, Aloha based protocols yield encouraging throughput performance in UWANs and are reconsidered as viable solution for underwater MAC. Based on the analysis, simulation and experiment results, we also provide discussion on the direction of future MAC designs.
Starting Page	1
Ending Page	6
File Size	1037098
Page Count	6
File Format	PDF
ISBN	9781457720895
e-ISBN	9781457720918
DOI	10.1109/OCEANS-Yeosu.2012.6263624
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-05-21
Publisher Place	Korea (South)
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Modems Media Access Protocol Acoustics Throughput Propagation delay OFDM
Content Type	Text
Resource Type	Article

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