基于模糊逻辑的视频服务器接纳控制

Fuzzy Logic Based Admission Control on Video Servers

提出一种新的基于模糊逻辑的VBR视频流接纳控制算法。该算法通过对调度周期的在线调整,使得系统所剩的磁盘I/O带宽和缓存空间达到一种等量的动态平衡,从而大大提高了系统资源的综合利用率。仿真结果表明,该算法下的接纳率比最优固定周期算法下的接纳率提高了约25％;同时,也比前人提出的动态调度周期算法的接纳率提高8％,并且算法的可行性也得到明显增强。

A novel fuzzy logic based admission control algorithm on VBR videos is proposed. By the on-line adjust- ment of scheduling period, residual system resources such as disk I/O bandwidth and buffer space are in a dynamic balance state, which enhances greatly the integrated utilization of system resources. The result of simulation shows the algorithm can increase admission rate by about 30% than that of optimal fixed period algorithm. The algorithm al- so can increase admission rate by 8% than that of former algorithm with dynamic scheduling period, and its availabili- ty is strengthened obviously.