论业务量相关性对排队性能的影响
Research on the impact of traffic dependence on queueing performance
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摘要: 探讨业务量的相关性对排队系统性能究竟会带来什么样的影响,对于高速网络中流量控制机制和资源分配算法具有非常重要的意义。该文采用了一种独特的方法,来分析业务量的相关性在一定的网络环境下对于排队系统性能的影响。仿真的结果显示:一定时间尺度范围内的长期相关性导致排队性能的恶化,而且这种影响对于增加缓冲区的大小并不十分敏感。而且,业务量序列的边际分布和Hurst参数仍不足以充分决定排队性能的好坏。Abstract: The impact of traffic dependence on queueing performance is of great significance to traffic control mechanism and resource allocation algorithm in high-speed networks. This article adopts a unique method to analyze the influence that the traffic dependence brings to the queueing performance under given network conditions. The results of simulation show that long-range dependence during a certain time scale will deteriorate the queueing performance, and that such an effect is insensitive to increasing the buffer size. Also the marginal distribution and Hurst exponent of traffic series are inadequate to determine the queueing performance.
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