异构网络环境中的拥塞丢包率仿真分析

Simulation Analysis of Loss Tolerance of Congestion in a Heterogeneous Network Environment

针对TCP Vegas算法在异构网络环境中流量公平性导致的拥塞丢包问题,将TCP Vegas拥塞控制算法与主动队列控制策略来行结合分析,提出了将网络模型中不同层次的拥塞控制机制进行结合的算法。网络仿真表明,结合算法能有效避免拥塞丢包。该算法对随机早期检测算法进行了改进,使其能够区分突发流量,从而降低拥塞丢包率,这也将为高可靠性网络的发展提供一个优良的参考价值。

In a heterogeneous network environment, in order to solve the loss tolerance problem of congestion caused by the flow fairness of TCP Vegas algorithm, the TCP Vegas congestion control algorithm and active queue control strategy are combined to carry on the analysis. Then , a kind of algorithm that combines congestion mechanism of different levels in the network model is proposed. Network simulation shows, the algorithm can avoid congestion lost packet effectively. In the network environment, the random early detection algorithm is improved, so that the new algorithm can distinguish the bursty traffic, thereby the congestion loss rate is reduced, which will also provide a good reference value of the development of high reliability network.