本文首先介绍计算机会议系统的一般结构及与窗口系统的关系，并提出一种层次结构的计算机会议的网络模型，该模型由逻辑层、影射层和支撑层组成．然后对影射层中不同的影射方式对系统性能的影响进行详细的分析和讨论，最后是用蒙特－卡罗方法对各影射方式进行仿真比较的数值结果 This paper first introduces the general structure of computer conferencing system and the relationship with the window system, and proposes a hierarchical network model of computer conferencing. The model consists of logic layer, mapping layer and support layer. Then, the influence of different reflection modes on the system performance is analyzed and discussed in detail. Finally, the Monte Carlo method is used to compare the numerical results of each projection mode