优先级管理的全双工交换式以太网实时通信

航空电子全双工交换式以太网(AFDX)以其独有的优势在航空航天等领域的应用不断扩展,但是由于通信模式,无法满足实时任务的可预测性和低延迟等要求,因此,研究AFDX的实时性成为一个重要的课题,为了提高网络的实时性最可行的措施就是采取优先级管理模式,对具有优先级的分组传输问题进行了分析,给出了两种优先级排队模型下,不同优先级分组的平均排队等待时间和平均逗留时间,并进行了计算机仿真.得出:采用具有优先级的分组传输模式能很好的提高网络的实时性.

A Research on Real-time Communication of the Full-Duplex Switch Ethernet based on the Priority Management

AFDX is applied in aviation and spaceflight field more abroad with its unique advantage, but because of its communication model, It can't satisfy the requirement of divinable and low latency of the real-time mission, The research of real-time of AFDX has became a important task, To improve the real-time of the network, the most doable method is to adopt the priority management model This paper analyzes the issue of packet transmission with different priority; gives the average queue time and stay time of packets with different priority under two queue models and gives the computer simulation We achieve: adopting a queue model with priority is a good measure for improving the real-time of the network.