An adaptive active queue management algorithm

Abstract

When we face the request of the massive users and the dynamic change of network, the existing active queue management mechanism can not satisfy the effectiveness, stability and robustness at the same time, thus we can't better control the congestion state of the network. This paper based on PI (Proportional Integral) algorithm, it proposed an adaptive PI active queue management algorithm API(Adaptive Proportional Integral). API gets the current queue length by real-time monitoring router buffer queue. Based on the current queue length with the target queue length deviation, it dynamically adjusts the relevant parameters in PI algorithm and the packet loss probability. Through the ns-2 simulations, it shows that, API has a faster response speed and a smaller queue jitter than PI algorithm, in the dynamic change of network, it shows a better stability and robustness, and more effective to alleviate the network congestion.