具有k种不同优先级话务流链路的性能分析  

Analyzing Performances of a Circuit-Switched Link with k Priorities

作　　者：石铁山[1] 刘有恒[1] 

机构地区：[1]北京大学

出　　处：《通信学报》1996年第2期7-11,共5页Journal on Communications

摘　　要：为改善网络性能，优先级服务方式已广泛应用于电信技术的各个领域，抢占优先级服务方式在军用通信网中的应用更具有重要的地位。Ｗａｎｇ和Ｓａａｄａｗｉ讨论了具有两种抢占优先级话务流链路性能的分析方法，本文将之拓展到具有任意ｋ种抢占优先级话务流链路性能的分析，导出对应的ｋ维稳态平衡方程的一般形式，并利用抢占优先级的特性提出求解状态方程组的有效方法。使用高斯消无法时，该方法可大大降低行列式的阶；使用ＳＯＲ法时，该方法可加快收敛速度。文中通过一个ｋ＝３的例子来说明一般方程的应用方法和解方程的技巧，使用两项指标评估所研究链路的性能。Priorities have widespread applications in telecommunications.Especially,preemptive priority has significant importance in military communication networks.In this paper we extend Wang and Saadawi's results for a link carrying calls of 2 preemptive priorities to a link carrying calls of k preemptive priorities.We deduce general k-dimensional steady-state balance equations and solve them efficiently using special characteristics of preemptive priority.The techniques we employ here greatly reduce solution space of Gaussian method or accelerate convergence of SOR.The way to apply the deduced general equations and the techniques of solution is displayed throughan example of k=3.Two metrics are defined to assess the performances of the link.

关 键 词：性能分析 链路 话务流 优先级服务 电信网 

分 类 号：TN913.2[电子电信—通信与信息系统]