Abstract: Due to the slow-start phase of TCP Vegas stop prematurely and the adjustment cycle of congestion avoidance phase is too long, TCP vegas can not share the available bandwidth when it coexists with TCP Reno. Because Vegas is too conservative in a competitive environment, this paper proposes a TCP Revised Vegas algorithm of high-performance, this congestion window control algorithm uses a smoothing dispose and incremental factor, increases Vegas aggressive. Through numerical analysis and simulation experiments show that performance and fairness of the new algorithm are improved whether in the single environment or the mixed environment.

Key words: TCP Vegas, slow-start, congestion avoidance, fairness, smoothing dispose, incremental factor