【摘要】 本文介绍了电路交换和分组交换相结合的新型光纤工业控制环网的设计与研究，着重考虑了环网的拓扑结构、体系结构、ＭＡＣ协议、帧结构和混合环路控制．更多还原

【Abstract】 The design scheme of fiber optic industrial control network based on two types of switching (circuit switching and packet switching) is put forward.Its topology structure,system structure,MAC protocol,frame structure and Hybrid Ring Control (HRC) are presented.更多还原