高速MANET中TCP-Vegas协议优化

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。在算法在拥塞避免阶段，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

Optimization of TCP-Vegas Protocol in High Speed MANET

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, optimized algorithm will adjust the size of congestion window, at the same time, it will observe both the difference 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.