IEEE 802.4 令牌总线网实时应用性能分析算法

A Performance Analysis Algorithm for Real Time Use in IEEE 802.4 Token Bus Network

对符合ＩＥＥＥ８０２．４标准的令牌总线网的性能指标评估给出了１种新的计算方法．重点分析了ＩＥＥＥ８０２．４标准的优先权机制，并考虑了令牌总线网络中的２种计时器ＴＨＴ、ＴＲＴ控制和信包缓冲区容量有限的性能指标评估问题，克服了以往不能分析优先权机制令牌网性能的局限．文中给出的方法简单易行、计算迅速、精度颇高．最后，通过示例说明了此方法的应用．

A performance analysis algorithm for real time use in IEEE 802.4 token bus network is proposed in this paper. Mainly for real time application network with the optional priority mechanism including 4 classes (class 6,4,2, and 0) is considered. Also two types of timers called T HT and T RT and other network parameters such as the finite buffer are presented. This algorithm overcomes the restriction of which the previous algorithm can not analyze the network with priority mechanism. It can be easily used by personl computers with high calculating velocity and high accuracy. An example is given to show the application of the proposed algorithm.