一种提高以太网确定性通信的方法

提出一种方法来实现以太网通信的确定性,应用多个媒体访问控制器组成半双工以太网用于模拟实时通信网络;通过分析和探讨最小退让时间对数据传输方面（主要是冲突、抖动和延时）性能的影响,提出在时间槽内传输帧数据并随机指定最小退让时间;应用二进制指数退让算法（BEB）改善带宽利用率,来提高以太网传输时间的确定性（实时性）。在这个仿真实验中,为每个基于CSMA/CD协议的控制器单元分配不同的最小退让时间（指定的范围）,来减少数据包的冲突、抖动和延时。测试表明,随机分配的最小退让时间,整个通信网络的实时性大大（确定性）增强。

An Approach of Improving Deterministic Communication of Ethernet

This paper proposes a method to achieve deterministic communication of Ethernet.The half-duplex Ethernet composed of multiple media access controllers is used for simulating real-time communications network.Through an analysis and discussion of the effect of minimum back-off time on data transmission performance（mainly on conflict,jitter and delay）,it proposes to transfer frame data in time slot and randomly specify minimum back-off time.The application of Binary Exponential Backoff（BEB） will improve bandwidth utilization,thus improve the certainty of Ethernet transmission time（real-timeproperty）.In this simulation experiment,different minimum back-off time for each control unit based on CSMA / CD protocol is assigned（specified range） to reduce the conflict,jitter and delay of data packets.The test results show that randomly assigned minimum back-off time can enhance the real-time property（certainty） of the entire communication network.