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时间触发机制可以近一步提高航空电子全双工交换式以太网(AFDX,Avionics Full Duplex Switched Ethernet)的确定性,保障时间关键消息具有完全的时间确定性.将时间触发机制引入了AFDX网络,设计了时间触发ADFX网络(TTAFDX,Time-Trig-gered AFDX)的体系结构,包括协议栈、虚拟链路类型、端系统调度、交换机调度、透明通信机制和降级通信机制,并且设计了端系统和交换机的时刻调度算法.对TTAFDX网络从理论和仿真实验两方面进行了分析,验证了TTAFDX网络对时间关键消息的完全时间确定性的保障.
The time-triggered mechanism can further improve the certainty of Avionics Full Duplex Switched Ethernet (AFDX) and guarantee complete timeliness of time-critical messages. The time-triggered mechanism is introduced into the AFDX network and the design Time-triggered architecture of ADFX network (TTAFDX), including protocol stack, virtual link type, end system scheduling, switch scheduling, transparent communication mechanism and degraded communication mechanism, and designed the end system and switch The TTAFDX network is analyzed from two aspects of theory and simulation experiment to verify the TTAFDX network’s guarantee of the complete time certainty of the time critical message.