Overview

Ocean-TUNE is a multi-university research project to develop a community ocean testbed for underwater wireless networks.  More information on the overview, motivation, features, and broader impact of Ocean-TUNE can be found on the main project website, http://www.oceantune.org/.

Investigators

1. Sumit Roy, Principal Investigator, sroy@uw.edu
2. Payman Arabashahi, Co-Investigator, payman@uw.edu
3. Noshad Bagha, Affiliated Graduate Student, nbagha@uw.edu   
4. Yanling Yin, Affiliated Visiting Researcher, yinyanlinghrbeu@hotmail.com

Research Directions

Ocean-TUNE at UW will focus on the following two research areas:

• Design of Cross-Layer Underwater Networking Protocol Stack
  • Simulation tools for performance analysis
• Implementation on UW AquaSent Testbed
• Acoustic Communications
• Simulation Tools for Underwater Acoustic Network Analyis

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Project Work Efforts

1. Testbed Deployment

Lake Union Deployments
Lake Union is an ideal underwater experimentation site located in vicinity of University of Washington campus. In addition to accessibility, we have access to Applied Physics Lab's (APL's) boats and dock facility for experiments involving a moving nodes. In addition to APL dock, we have identified two other docks, Pocock Rowing Center(Pocock)and Seattle Boat Company(SBC.) Please refer to deployment reports for the particular topology of each expriment.

    

• Lake Union bathymetry: http://www.gue-seattle.org/mapping-project/
• Lake Union temperature: http://green2.kingcounty.gov/lakes/ConventionalsGraphs.aspx

Summer 2015

We have had three successful deployments in Summer 2015.

1. July 30th deployment - testing new UW-Aloha with slight modification in exponential back-off. Data
2. Sep 21st deployment-  taking base line and repeating test conducted on July 30th, eliminating time synchronization issues to confirm pervious results. Data
3. Sep 29th deployment- channel charactetization, modem performance, and delay spread between SBC dock  and recivieng node located at Pocock.Data

Hood Canal Deployment
Ocean-TUNE is expected to deploy four testbeds at four different sites to provide diverse coverage of coastal geography and weather in the US. UW will be in charge of deploying one of these testbeds in an area called the Hood Canal, one of the four major basins of Puget Sound in the state of Washington.

• Overview of Deployment
• Site Location Diagrams
• Hood Canal Site Investigation
• Environmental Data from Hood Canal:
  1. Bathymetry: HCBathy.mat
  2. CTD Data from Hoodsport Buoy: HC_HP_CTD_data_bin_web_4_10.mat
  3. Matlab Script for Sound Speed Profile Generation: sw_svel.m
  4. References for Sound Speed Profile:
     1. http://resource.npl.co.uk/acoustics/techguides/soundseawater/content.html#PD
     2. http://unesdoc.unesco.org/images/0005/000598/059832eb.pdf

AquaSent Modems
One major component of these testbeds will be the AquaSeNT modems. These modems are high-speed orthogonal frequency division multiplexed (OFDM) acoustic modems. More information on these modems is provided below:

• AquaSeNT Modem User Manual
• AquaSeNT Modem Setup
• Product Website: http://www.aquasent.com/products 
  

2. MAC Layer Design

UW will be focusing on making improvements to the MAC layer for Ocean-TUNE's underwater network. In particular, current efforts are aimed at developing an improved ALOHA implementation.

• Pure Aloha implementation in Matlab: http://www.mathworks.com/matlabcentral/fileexchange/3834-home-networking-basis/content/MFiles/Chap06/RAAloha.m

This design will implemented on Ocean-TUNE's networking software called SeaLinx.

• SeaLinx Protocol Overview
• SeaLinx Software Summary
• SeaLinx User Guide
• SeaLinx Test Scripts:
  • Instructions
  • Shell Scripts
  • C Files

3. Network Simulation

To aid in future site experiments to test newly developed underwater communication and network algorithms, UW will also be focusing on developing a network simulation of the Ocean-TUNE testbed in the Hood Canal using NS-3.

• Underwater Stochastic Propagation Models