计算机工程与应用 ›› 2012, Vol. 48 ›› Issue (18): 71-75.

• 网络、通信、安全 • 上一篇    下一篇

基于超爱尔兰分布的自相似网络排队模型研究

徐  兴,岳学军,林  涛   

  1. 华南农业大学 工程学院 电子工程系,广州 510642
  • 出版日期:2012-06-21 发布日期:2012-06-20

Research on queuing model of self-similar network based on hyper-erlang distribution

XU Xing, YUE Xuejun, LIN Tao   

  1. Department of Electronic Engineering, College of Engineering, South China Agriculture University, Guangzhou 510642, China
  • Online:2012-06-21 Published:2012-06-20

摘要: 现有网络的业务流研究表明,多种通信业务中普遍存在自相似特性,但是如何对自相似业务流进行建模和分析一直是个难解问题。基于超爱尔兰拟合算法,建立了到达为泊松分布,服务时间为超爱尔兰分布的M/HErD/1/K自相似排队模型,推导得到呼叫损失概率、平均排队队长等排队性能的解析解。在实际业务环境下和传统的M/M/1/K排队模型进行了仿真对比,结果表明M/HErD/1/K模型不仅可有效表征业务流的快挂业务特性,而且能仿真出该网络在业务负荷较重时潜在的运营风险,对实际网络运营管理具有重要的指导作用。

关键词: 超爱尔兰分布, 排队模型, 自相似

Abstract: Research on network measurement has shown the presence of self-similar properties in great number of network traces, but how to build self-similar queuing model and analyze it has been a problem. On the basis of hyper-erlang fitting method, M/HErd/1/K queuing model with passion arrive rate and hyper-erlang service time is proposed, and the queuing performance of the self-similar network service is derived. Compared with traditional M/M/1/K queuing model under real trace, new model effectively describes not only the quick-hang traffic attribute, but also the potential risk under heavy traffic load. So the proposed model is better, and it is instructive to the network operation and maintenance.

Key words: hyper-erlang distribution, queuing model, self-similar