A Window-Based Flow Control Mechanism based on TCP Vegas with Explicit Congestion Notification

A window-based flow control mechanism is a sort of feedback-based congestion control mechanisms, and has been widely used in TCP/IP networks. Recently proposed TCP Vegas is another version of the TCP mechanism and has potential to achieve much better performance than current TCP Tahoe and Reno. In this paper, we focus on a window-based flow control mechanism based on a congestion avoidance mechanism of TCP Vegas. We first present a control theoretic analysis for its stability. We then discuss several drawbacks of the window-based flow control mechanism, being inherited from TCP Vegas, through simulation experiments. We finally investigate how these drawbacks are solved by incorporating the ECN (Explicit Congestion Notification) mechanism into the window-based flow control mechanism. 英文 key words TCP/IP Network, Window-based Flow Control, TCP Vegas, Control Theory, ECN (Explicit Congestion Notification)