Project: Designing a High Capacity Wireless Mesh Network

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ECE 191 Spring 06

• Project Designing a High Capacity Wireless Mesh
  Network
• Sponsor CalIT2
• Professors Dr. Pankaj Das Dr. Clark Guest
• Mentor Dr. B. S. Manoj Prof. Ramesh Rao
• Team members
• Sanjay Gidvani sgidvani_at_ucsd.edu
• Vasilios Ikosipentarhos vikosipe_at_ucsd.edu
• Wo Chio Lao c0lao_at_ucsd.edu
• Vishal Sidhpura vsidhpur_at_ucsd.edu
• Michael Tsui mitsui_at_ucsd.edu

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Agenda

• Gantt Chart
• Tasks performed by members
• Modification of Contention Window
• Summary
• Objectives for Next Week

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(No Transcript)
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Tasks

• Created poster for US-India Summit
• Modified Contention Window / GloMoSim
  Simulations
• Michael Tsui
• Wo Chio Lao
• Vishal Sidhpura
• Sanjay Gidvani
• Automation Code
• Vasilios Ikosipentarhos

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Outline

• Background
• Problem Statement
• Formulate new approach to improve throughput over
  an increased hoplength
• GloMoSim Simulations
• Analysis of Solutions
• Conclusion

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GloMoSim Simulations

• Our goal is to see if there is a direct
  relationship between the Contention Window
  Function and throughput.
• Compare two functions
• Increasing CW function
• CW Hoplength
• Decreasing CW function
• CW - Hoplength

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Average CW Size Throughput
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GloMoSim Results
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Relationship between Contention Window Function
and Throughput

• Increasing contention window function will
  decrease throughput and decreasing contention
  window will increase throughput.
• Reviewing our Contention Window Function
• Combination
• if (nodelt4)
• (CW-node)3
• Else
• (CW-4-node)3

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Outline Code for Automating Simulations

• Initialize and open file
• double periodTotal, periodAVerage
• for loop(increasing transmission range as many
  times as we need to)
• periodTotal0
• periodAverage0
• for loop (increasing seed as many times as
  we need to)
• run Glomosim
• periodTotal periodTotal result period from
  glomosim
• if (counter final loop ) periodAvera
  geperiodTotal/final loop
• end for loop
• write periodAverage/transmission range to
  file
• end for loop
• close file

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Summary

• Verified
• As you decrease the contention window as a
  function of hoplength, throughput is improved.

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Objectives for Next Week

• Continue Phase II-Experiment
• Implement a CW function that is decreasing but
  has different Average CW sizes and find a
  relationship.
• Implement C code to automate simulations.