关键词: 拥塞控制, 主动队列管理, 自适应虚拟队列, 极点配置, 自调整

Abstract: A novel Enhanced Adaptive Virtual Queue（EPAVQ） algorithm based on pole assignment is proposed to cope with the control parameters of Active Queue Management（AQM） hard to tuning problem in dynamic network. Based on the stability analysis of Adaptive Virtual Queue（AVQ） algorithm using classical control theory combined with fluid flow model of TCP, the tuning rule of AVQ’s control parameter is described exploiting pole placement technique. The control parameters of EPAVQ algorithm are automatically tuned in response to on-line estimation of link capacity and traffic load so that EPAVQ algorithm can perform well for a wide-range of network conditions. Compared with AVQ, the ns2 simulation results show the EPAVQ algorithm exhibits good transient response and better performance when network load changes.

Key words: congestion control, active queue management, adaptive virtual queue, pole assignment, self-tuning