| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2007: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Research Abstract |
I construct a robust, selfadaptive, scalable, and robust congestion control mechanism for TCP named as TCP Symbiosis. The largest difference of our proposed mechanism from existing TCP variants is that I borrowed algorithms from biophysics to update the window size : the logistic growth model and the Lotka-Volterra competition model. I treat the competitive relationship among species in biophysics models as the bandwidth sharing among competing TCP connections in the Internet. I then enhance the congestion control mechanism to to deal with the environmental changes, by adding the noise term to Lotka-Volterra competition model equation and adaptively setting control parameters. I investigate the effectiveness of the proposed mechanisms by both simulation and implementation experiments and confirm that TCP Symbiosis can privide high performance regardless of the network bandwidth delay product, and survive against measurement errors and sudden environmental changes.
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