AFDX网络技术综述

摘要

Aviation full duplex switched Ethernet ( AFDX ) uses commercial off-the-shelf ( COTS ) technology and open standards which on the basis of the traditional Ethernet , it is a kind of large and medium-sized aircraft integrated avionics system of inter-connected communication star network , and becoming the best choice for the next generation of aviation data network . AFDX net-work makes use of robust , mature , high-speed commercial IEEE802 . 3 Ethernet standard communication principle and network structure which uses key technology such as full duplex , double redundancy fixed bandwidth allocation , virtual link , the redundancy management and integrity check in order to satisfy the avionics systems for high-bandwidth , low-latency , high-security , high-relia-bility , strong real time , deterministic communications service requirements . This paper further understands AFDX network back-ground , analyzes the AFDX network topological structure , working principle and network features in detail , and illustrates the further development trend of AFDX network . All of this paper′s research is important for subsequent AFDX network research and engineer-ing applications .%航空全双工交换式以太网( AFDX )在传统以太网的基础上采用商用现成技术( COTS )和开放式标准，是一种满足大中型飞机综合化航空电子系统互联通信的星型网络，成为下一代航空数据网络的最佳选择。 AFDX 网络利用鲁棒的、成熟的、高速商用标准以太网 IEEE802.3通信原理和网络结构，在通信协议、拓扑结构上采用全双工、双余度、带宽固定分配、虚链路、余度管理和完整性检查等措施，使之满足航空电子系统对高带宽、低延迟、高安全性、高可靠性、强实时性和确定性的通信服务要求。在深入理解 AFDX 网络背景的基础上，详细分析了 AFDX 网络的拓扑结构、工作原理及网络特性，进一步说明了 AFDX 网络未来的发展趋势，为后续的 AFDX 网络研究与工程应用奠定了基础。