高速移动自组网(MANET)中TCP-Vegas协议优化  

Optimization of TCP-Vegas Protocol in High Speed MANET

作　　者：柏长帅[1] 孙荣平[1] 周洪霞[1] 程瑞[1] 

机构地区：[1]海军航空工程学院青岛校区,青岛266041

出　　处：《科学技术与工程》2014年第1期224-226,共3页Science Technology and Engineering

摘　　要：TCP-Vegas协议比传统的TCP协议性能更优越,但是在高速MANET中,由于节点运动速度快、拓扑变换频繁,仍然存在性能恶化的问题,因此,在TCP-Vegas协议的基础上,提出了一种新的适用于高速MANET的优化算法来避免其性能的恶化。在拥塞避免阶段,优化算法在调整拥塞窗口大小时,不再仅观察希望吞吐量与实际吞吐量差值,还需要观察路由跳数的变化。仿真实验结果表明,新的优化算法在高速MANET中比TCP-Vegas协议表现出更好的性能。Although the performance of TCP-Vegas protocol is superior to the traditional TCP protocol, its performance will get worse in high-speed MANET due to the high-speeded node and frequently changed topology. So a new kind of optimized algorithm is promoted to apply to the high-speed MANET avoiding its potential worseness on the basis of TCP-Vegas protocol. On the phrase of congestion avoidance, opti- mized algorithm will adjust the size of congestion window, at the same time, it will observe both the differ- ence of the expected throughput and the actual throughput, and the changes of tote hop. According to the results of simulation, new optimized algorithm in high-speed MANET performs better than that of tht TCP-Vegas protocol.

关 键 词：MANET TCP—Vegas 拥塞窗口 路由跳数 

分 类 号：TN914[电子电信—通信与信息系统]