M.S. Thesis Defense: Wei Bai

Friday, April 10, 2015
3:00 p.m.-5:00 p.m.
AVW2328
Maria Hoo
301 405 3681
mch@umd.edu

ANNOUNCEMENT: M.S. Thesis Defense
 
Name: Wei Bai
 
Committee:
Professor Richard La (Chair)
Professor Gang Qu
Dr. Greg Stein
 
Time: Friday April 10, 2015 at 3:00 PM

Location: AVW 2328
 
Title: Performance Evaluation of Nullspace Stopping Condition Incorporating Network Coding in Delay Tolerant Networks
 
Abstract: 
 
For delay tolerant networks (DTNs), since there is no guarantee of end-to-end path from a source to a destination, routing protocols should make use of opportunistic contacts to deliver files. Although protocols employing network coding have been shown to achieve promising results in DTNs, they still suffer from redundant transmissions. An efficient stopping condition utilizing nullspace has been proposed recently. But more comprehensive studies are needed. In this paper, a systematic research on effectiveness and efficiency of nullspace stopping condition is explored. We propose a novel algorithm to calculate nullspace. Using comprehensive simulations, we show that the benefits of nullspace stopping condition to network coding depend on scenarios. Moreover, performances may vary even in the same scenario with respect to the number and size of disseminated files. Finally explanations about these phenomena are given out.

Audience: Graduate  Faculty 

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