局网仿真数学模型及其面向对象实现方法

从局网的基本关系式出发,为局网仿真系统建立了一种数学模型.与传统的性能模型不同,该数学模型把各种局网的差异隐蔽在5个映射之中,没有排斥实际系统中的任何细节.这些映射的功能可以由模拟局网的协议、传输介质和站点的对应对象来分别完成,形成面向对象仿真系统的基本结构.对象内部不同的结构和细化可以实现不同局网的差异和细节,而仿真系统的基本结构保持不变.令牌总线和混合CSMA令牌协议被作为范例演示了该数学模型的普遍适用性.

Mathematical Model and its Object-oriented Implementation for Simulation of Local Area Networks

A common relationship existing in Local Area Networks (LANs) is presented, from which a mathematical model for simulation of LANs is developed. Unlike conventional performance models, the mathematical model encapsulates the differences between LANs into five mappings without ignoring any details of real systems. The mappings can be implemented by corresponding objects, which imitate the protocol, the medium and stations in a LAN respectively, forming the basic structure of an object - oriented simulation system. While the basic system structure remains the same, the internal structures and details of the objects may vary with different LANs. Token Bus and hybrid CSMA/Token protocols are exemplified to illustrate the universal applicability of the proposed model.