Type of Document	Master's Thesis
Author	Kostic, Igor Aleksandar
URN	etd-090299-161911
Title	Fiber-Based ATM Computer Network Performance and Survivability Issues under Soft Failure Conditions
Degree	Master of Science
Department	Electrical and Computer Engineering
Advisory Committee	Advisor Name Title Jacobs, Ira Committee Chair Claus, Richard O. Committee Member Midkiff, Scott F. Committee Member
Keywords	Optical Fiber ATM Soft Failures Computer Networks
Date of Defense	1999-08-12
Availability	unrestricted
Abstract In this research a suspected "gray" area in computer network performance that might exist between the network's optimum performance and complete network failure was investigated. Changes in performance were studied as seen by the application layer of the network as attenuation was introduced at the physical layer of the network. The network performance was measured for four groups of tests running over TCP and UDP. Various scripts emulating different network applications were used. Ultimately the performance was evaluated at different optical power levels, based on throughput, transaction rate, response time, and lost data. Additionally, the bit error rate characterization of the attenuated optical fiber link was analyzed. Ultimately, performance of the fiber optic ATM-based computer network as seen by the user was correlated with optical power degradation introduced in the physical layer. A decrease in performance was found as attenuation was increased, even in the range of "normal" operating conditions. As expected, TCP, although not immune to soft failures, performed better than UDP. A description of the investigation, tests, scripts, methods and results are included.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access    1.pdf 17.96 Kb 00:00:04 00:00:02 00:00:02 00:00:01 < 00:00:01   2.pdf 29.11 Kb 00:00:08 00:00:04 00:00:03 00:00:01 < 00:00:01   3.pdf 227.04 Kb 00:01:03 00:00:32 00:00:28 00:00:14 00:00:01   4.pdf 35.63 Kb 00:00:09 00:00:05 00:00:04 00:00:02 < 00:00:01   5.pdf 134.94 Kb 00:00:37 00:00:19 00:00:16 00:00:08 < 00:00:01   6.pdf 249.18 Kb 00:01:09 00:00:35 00:00:31 00:00:15 00:00:01   7.pdf 246.32 Kb 00:01:08 00:00:35 00:00:30 00:00:15 00:00:01   8.pdf 17.57 Kb 00:00:04 00:00:02 00:00:02 00:00:01 < 00:00:01   Abstract.PDF 5.55 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   Acknowledgements.PDF 5.83 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   Contents.pdf 595.09 Kb 00:02:45 00:01:25 00:01:14 00:00:37 00:00:03   Figures.PDF 175.03 Kb 00:00:48 00:00:25 00:00:21 00:00:10 < 00:00:01   Glossary.pdf 8.98 Kb 00:00:02 00:00:01 00:00:01 < 00:00:01 < 00:00:01   IKADDENDUM.PDF 3.55 Mb 00:16:27 00:08:27 00:07:24 00:03:42 00:00:18   References.pdf 11.45 Kb 00:00:03 00:00:01 00:00:01 < 00:00:01 < 00:00:01   Tables.PDF 119.80 Kb 00:00:33 00:00:17 00:00:14 00:00:07 < 00:00:01   TITLE.PDF 5.61 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   Vita.PDF 68.99 Kb 00:00:19 00:00:09 00:00:08 00:00:04 < 00:00:01

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