Active Queue Management Supporting TCP Flows Using Dynamically Controlled Target Queue Length

摘要

Active queue management (AQM) is a congestion control scheme for transmission control protocol (TCP) flows. However, the appropriate adjustment of a target queue length has not been studied and discussed for proportional-integral-derivative (PID)-based AQM controllers. This paper proposes an AQM technique using a PID-based controller and an algorithm that dynamically controls the target queue length in order to more efficiently utilize the buffer capacity of the bottleneck router. Simulation results show that the proposed AQM using a dynamically controlled target queue length outperforms the conventional AQM using a constant target queue length in terms of buffer utilization efficiency.