摘要
应用控制理论对网络数据传输过程进行了分析和建模,提出了一种基于回环时间RTT的P-Smith预估拥塞控制策略。该方法建立在RTT长相关性的基础上,可以在线实时调节控制器中的比例系数和时延参数以保证控制回路的稳定性以及发送速率的平滑性。仿真结果表明,使用该控制方案能使缓冲器队列长度快速收敛到目标值,发送速率具有良好的平滑性能,与传统的PID控制器相比具有更好的稳定性和鲁棒性。
The data transfer of network is analyzed and modeled using control theoretic. A simple proportional controller(P) plus a Smith predictor based on RTT long-range dependence is proposed. The proportional coefficient and latency parameters can be adjusted online,which ensures the stability of the controlled loop and the smoothness of sending rate. Simulation results demonstrate that the control scheme can lead to quick convergence of the queue length to the desired value and make the speed of data sending change smoothly, This scheme has better robustness and stability than the traditional PID controller.
出处
《计算机应用与软件》
CSCD
北大核心
2008年第2期40-42,共3页
Computer Applications and Software
基金
国家自然科学基金资助项目(60573056)
浙江湖州市自然科学基金资助项目(2006YZ03)。