Analysis of a Window-Based Flow Control Mechanism Based on TCP Vegas in Heterogeneous Network Environment

Another version of TCP called TCP Vegas has been proposed and studied in the literature. It can achieve better performance than the current TCP Reno. In the previous studies, steady-state behavior of a window-based flow control mechanism based on TCP Vegas has been analyzed for a simple network topology. This paper extends the analysis to a generic network topology where multiple bottleneck links exist. The paper first derives equilibrium values of a window size of a TCP connection and the number of packets waiting in a router's buffer in steady state. It also derives throughput of each TCP connection in steady state, and investigate the effect of control parameters of TCP Vegas on fairness among TCP connections.