Analysis of a Window-based Flow Control Mechanism for TCP Connections with Different Propagation Delays

A feedback-based congestion control mechanism is essential to realize an efficient best-effort service in highspeed networks. A window-based flow control mechanism called TCP (Transmission Control Protocol), a sort of feedbackbased congestion control mechanism, has been widely used in the current Internet. Recently-proposed TCP Vegas is another version of TCP mechanism, and achieves much better performance than the current TCP Reno. In our previous works, we have analyzed the stability of the window-based flow control mechanism based on the TCP Vegas. In this paper, using our analytic results, we invesitigate how dynamics of the window-based flow control mechanism is affected by the difference in propagation delays of TCP connections. We also investigate the effect of various system parameters on transient performance of the window-based flow control mechanism as well as the effect on its stability. 英文 key words Internet, Window-Based Flow Control Mechanism, TCP Vegas, Control Theory, Characteristic Analysis