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为了在局域网内实现综合业务通信,我们研究了线路交换与包交换相结合的环形网。网内的传输与交换均采用时分制(TDM)。每个TDM帧分为两个域:线路交换域与包交换域,前者按照用户的申请分配信道,提供话音等实时性业务,后者采用令牌传递(Token Passing)协议,提供数据等非实时性业务。本文对该网络进行了性能分析和计算机模拟研究,用M/G/1排队系统模型分析了包交换域的工作,借助于复合母函数法得出了性能计算公式。性能分析结果与模拟结果基本一致。
In order to realize the integrated business communication in the local area network, we have studied the circular network that the line exchanges and the package exchanges. Intranet transmission and exchange are using time division (TDM). Each TDM frame is divided into two domains: the line switching domain and the packet switching domain, the former allocates channels according to the user’s application and provides real-time services such as voice. The latter uses Token Passing protocol to provide data and other non-realtime Sex business. In this paper, the network performance analysis and computer simulation of the study, using M / G / 1 queuing system model analysis of the packet switching domain work, with the help of the composite mother function method to calculate the performance formula. Performance analysis results and simulation results are basically the same.