交换式以太网在航空电子系统中的应用

基于交换式以太网的航空电子系统,端系统与交换机间不仅有一条直接、双向的连接,同时还与另一个交换机之间保持第二条双向连接.系统协议采用虚拟链接结构,在MAC层中为每个终端分配唯一的48位地址标识符.端系统通过几个独立、冗余网络通信,每帧同时通过两个网络发送,先到达接收端的具有正确序号的帧被接收,第二个具有相同序号的帧到达时被丢弃.如果第一个帧未到达接收端,则第二个到达的正确帧被接收.

Application of Switched Ethernet in Avionics

For avionics network based on switched Ethernet, its each end system has a direct and bi-directional connection with a switch. There is a second bi-directional connection between another switches. Visual link architecture was adopted for system protocol and each end system was assigned a unique 48-bits address as identifier in MAC layer. End systems were communicated with one another through several independent redundant networks. Each frame was sent through two networks at the same time. The first arrived frame with right serial number was received and the other frame with same serial number was discarded. If the first frame did not reach destination, the second correct frame was received.