Design and delay analysis of time-triggered AFDX network
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摘要: 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-Triggered 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.
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关键词:
- 航空电子全双工交换式以太网 /
- 时间触发网络 /
- 体系结构设计 /
- 实时性分析
Abstract: Time-triggered mechanism can enhance the determinacy of avionics full duplex switched ethernet(AFDX), and guarantee the temporal determinacy of time-critical message. Time-triggered AFDX (TTAFDX) was proposed, which is the combination of AFDX and time-triggered mechanism. The architecture of TTAFDX was designed, which includes protocol stack, virtual link, scheduling of end system, scheduling of switch, transparent communication and degradation communication. Delay analysis of TTAFDX was done in both theory and computer simulation, and the result shows that TTAFDX can be a totally deterministic network for time-critical message. -
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