TCP Vegas拥塞避免机制的改进算法  

TCP Vegas-W: Enhanced TCP Vegas congestion avoidance mechanism

作　　者：王斌[1] 陈元琰[1] 胡愚 冯伟[1] 

机构地区：[1]广西师范大学计算机科学与信息工程学院,广西桂林541004

出　　处：《计算机应用》2010年第9期2485-2487,2500,共4页journal of Computer Applications

基　　金：广西自然科学基金资助项目(0728099)

摘　　要：TCP Vegas协议在许多方面的性能都比传统TCP协议优越,但是研究表明TCP Vegas在拥塞避免机制上存在一些问题,包括与New 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-W。该算法不依赖于路由器端的缓冲队列管理,可以在端节点单独运行。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。The 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 New 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-W. The algorithm did not depend on the buffer management scheme implemented at the routers 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 Vegas.

关 键 词：拥塞避免 TCP VEGAS 公平性 NS2 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]