【摘要】 OPNET 是一用来模拟通信系统和预测网络性能的强大仿真工具。传统无线局域网由于时延不确定性问题在工业控制领域不能得到直接应用。考虑了工业应用场合的特点,介绍了一种无线局域网实时介质访问控制协议。给出了节点的仿真构造、模块内部的状态转移图,实时和非实时节点的时延曲线。仿真结果表明该介质访问控制协议能满足实时节点的通信要求,同时非实时节点通过冲突避免减少了冲突增大了网络的吞吐量。更多还原

【Abstract】 OPNET is a powerful network simulator, which can be used to simulate communication systems and predict network performance. The traditional wireless LAN can not be used directly in the industrial areas because of its characteristic of the message’s delay indetermination. Considering the demands of industrial applications, it is introduced a real-time wireless LAN MAC Protocol. The modeling and structure of nodes and modules, and the results of delays for the different types of nodes are presented. The simulation results show that the protocol can satisfy the demand of real-time, and meanwhile the throughput of general nodes are increased due to collision avoidance.更多还原