网络控制系统中周期性通信的实时性充分条件

网络控制系统是一种分布式时间系统，具有严格的实时性要求，系统中包括周期性通信、随机性通信和突发性通信，其中周期性通信的实时性 对于系统的性能来说是最重要的。本基于数据链路层数据传输策略，从逻辑令牌传递和信道竞争两个角度分析了周期性通信的实时性，给出了实时性满足的充分条件，为网络控制系统的设计提供了理论依据。

Real-time Sufficient Condition of Cyclic Communication in Networked Control System

Networked Control System is a kind of distributed timed system which demands strict real-time deadline.The communications in the system are classified into three types:cyclic,stochastic and burst-out and the real-time of cyclic communication is the most important one to the performance of the system.Based on the data transfer policy of Data Link Layer the real-time property of cyclic communication is analyzed from the two point of view of logical token passing and channel competition. The sufficient conditions of real-time fulfillment are presented as the theory basis for the design of Networked Control System.