Improvement of real-time protocols based on industrial ethernet
基于工业以太网实时协议的改进

Referring to a very popular fieldbus protocol Profibus DP,a real-time protocol based on Industrial Ethernet was presented.The real-time protocol improved the original Profibus DP Protocol,based on the IEEE802.2 Logical Link Control(LLC) sublayer to implement the Profibus DP functions on Ethernet.The design shows how real-time protocol can be implemented to satisfy the requirement of real communication at the device level in factory automation systems and maintain the compatibility and continuity with already existing Profibus DP applications.Moreover,some performance figures of real-time protocols were analyzed and the results of some simulation tests were given.