TCP Vegas拥塞避免机制的改进算法

摘要

TCP Vegas协议在许多方面的性能比传统的TCP协议优越,但是TCP Vegas在拥塞避免机制上存在一些问题,包括与TCP Reno竞争时性能较差、对先前的连接不公平等问题.针对上述问题提出了一种改进的拥塞避免算法TCP Vegas-N,该算法不依赖于其他因素,可在端节点上运行.仿真实验结果表明,改进的算法在有线网络中能获得更好的性能,对解决上述Vegas存在的问题达到了良好的效果.%TCP Vegas'performance is better than the traditional TCP protocol in many ways.However,studies have shown that TCP Vegas has some defects in its congestion avoidance mechanism.They include that TCP Vegas has a poor performance when it competes with TCP Reno and it is not fair to the previous connections.To solve these problems,the authors proposed an improved congestion avoidance algorithm called TCP Vegas-N.The algorithm did not depend on the other factors and hence could be implemented solely at the end host.The experimental results show that the improved algorithm can get better performance in the wired network and it is a good solution to the problems of the Vegas.