Event-driven simulation and analysis of an underwater acoustic local area network

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Authors
Goh, Meng Chong.
Subjects
Advisors
Rice, Joseph A.
Date of Issue
2010-06
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
"Seastar" is an underwater Local Area Network (LAN) concept involving high-frequency acoustic modems sending large volumes of data from a distributed set of peripheral sensor nodes to a centralized node for data fusion. The notional operating range of the acoustic modems used is 500m. This research considers four candidate Seastar network protocols: Time division multiple access (TDMA) polling with and without Selective automatic repeat request (SRQ), and TDMA token ring with and without SRQ. The number of peripheral nodes, the layout of the nodes, and the noise level of the environment are modeled and evaluated, according to performance metrics, including data throughput, communications latency, and packet error rate. It was determined that in a low-noise environment, the token ring with SRQ protocol delivers the most throughput of data with the minimum number of dropped packets, while in high-noise conditions, polling with SRQ is preferred. In addition, if data throughput is not a priority, polling with SRQ is advantageous. Therefore, it is recommended that a switch be implemented for adaptively selecting the network protocol depending on the prevailing noise conditions and the critical performance metrics.
Type
Thesis
Description
Series/Report No
Department
Engineering Acoustics
Organization
Naval Postgraduate School (U.S.)
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NPS Report Number
Sponsors
Funder
Format
xvi, 91 p. : ill. ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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