基于内模补偿的网络拥塞控制新算法:IC-AQM

IC-AQM: New Congestion Network Control Scheme Based on Internal Model Compensation

已有的AQM算法都没有充分考虑到长时滞对算法性能的影响,该文利用频率域模型降价拟合方式建立了TCP流量控制中主动队列管理AQM系统的等效模型,应用控制理论中的内模补偿原理设计鲁棒的时滞补偿AQM算法(IC-AQM),克服了长时滞给对队列稳定造成的不利影响,仿真结果表明,这种新算法在长时滞小期望队列综合性能明显优于已有的RED、REM、PI等算法,链路利用率大大提高。

The present active queue management （AQM） schemes neglect the impact on the performance caused by large delay. Based on the model reduction theory in frequency-domain, TCP AQM system model are proposed, and a robust delay compensation AQM scheme （IC -AQM） applying the principle of internal mode compensation in control theory is designed. The new scheme restricts the negative impact on the queue stability caused by the large delay. The simulation results show that this new scheme is superior to that of the present RED, REM and PI schemes when the network is in large delay and small queue length, and the link utilization is increased.