Abstract:

A proportionalintegralrate (PIR) controller for active queue management (AQM) scheme based on the linearized AQM model was proposed. PIR controller is well suited to dynamic network environments where traffics change frequently. In order to address the slow response of PI controller, a normalized input rate control PIR controller was used to speed up the responsive time under varying network conditions. Analysis and simulation results show that under varying network conditions PIR controller will have a fast response and improve the buffer utilization, and have a good perform in stability and link utilization.

Key words: active queue management, proportionalintegral controller, proportionalintegralrate controller