A Selective Automatic Repeat Request Protocol for Undersea Acoustic Links

Abstract

A recent improvement to the Seaweb underwater wireless network was the implementation of a Selective Automatic Repeat Request (SRQ) mechanism. SRQ is a protocol implemented in the Seaweb link layer as a measure for mitigating unreliability inherent in the telesonar physical layer. In January 2004, an experiment was performed in St. Andrew's Bay, Panama City, Florida. The goal was to transmit large data files through the network, in accordance with a Naval Special Warfare need for imagery file telemetry. For three point-to-point test geometries, SRQ was tested with a noisy and variable physical layer. Through the incorporation of SRQ, the unreliability was overcome. A link-budget model calibrated with the sound channel data collected from the experiment establishes the benefit of a "SRQ gain."

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2004
Accession Number
ADA424937

Entities

People

  • John M. Kalscheuer

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustics
  • Ambient Noise
  • Autonomous Underwater Vehicles
  • Communications Protocols
  • Computer Communications
  • Data Transmission
  • Digital Communications
  • Frequency
  • Geometry
  • Human Factors Engineering
  • Measurement
  • Power Levels
  • Telemetry
  • Transmission Loss
  • United States Naval Academy
  • Wireless Networks

Readers

  • Acoustical Oceanography.
  • Psychometric Testing or Psychological Assessment.
  • Radio communications and signal processing.