不同服务类型的队列管理及性能比较

为提高网络利用率和数据包处理速度，针对不同应用的网络流量，在网络拓扑结构的参数设置相同的情况下，使用NS2模拟器对瓶颈链路分别采用7种主动队列管理机制进行仿真，通过分析跟踪文件并计算各种算法的QoS性能，得出每种流量对应的最优队列管理机制，并将队列管理系统在网络处理器IXP2400上进行实现。实验结果表明，FTP流量、CBR流量、HTTP流量分别在SRED算法、BLUE算法、FRED算法下QoS性能达到最优。

Queue Management Method and Performance Comparison of Different Services

In order to improve network efficiency and packets processing speed, under the same preferences of network topology, seven different active queue management algorithms of different network traffic are simulated on the base of the NS2, which are implemented on the bottleneck link. By analyzing trace file and calculating every QoS parameter, the best queue management algorithm is advanced and the system is realized on network processor¬¬——IXP2400. The performance of QoS has achieved optimization for FTP traffic in SRED algorithm, CBR traffic in BLUE algorithm, HTTP traffic in FRED algorithm.