基于数字化图书馆综合业务流的网络控制方法

针对数字图书馆网络的服务质量控制问题,提出了RED阈值动态调整的自适应机制,缓解了RED的参数的敏感性,增强了RED自适应性、鲁棒性,实现了一种基于RED的AQM新策略――Adaptive Threshold RED（ATRED）。为了更好的分析ATRED的控制性能,在不同的网络环境下ATRED与RED和GENTLE RED的控制性能进行了比较,使用NS-2进行仿真,仿真结果表明,自适应性增强的ATRED算法对队列的控制更为有效,队列的振荡相对较小,能为用户提供更为稳定可靠的服务质量。

A Network Control Strategy for Information Traffic of Digital Library

To enhance the robustness of library network, a novel AQM scheme is proposed for network congestion avoidance. Dif- ferent to the mechanism of traditional RED, the maximal threshold （ ） and the minimal threshold （ ） are not configured statically, but dynamically adjusted as the buffer occupancy changes. Furthermore, the closed-loop stability of the congestion control system is studied based on the TCP-AQM dynamic fluid model. It is proved that the stability of the network system can be guaranteed. Fi- nally, the simulation experiment is studied to verify the superior per/brmance of ATRED, especially in a varying network environ- merit.