Time delay oriented reliability analysis of Avionics Full Duplex Switched Ethernet

Besides the hardware/software failure of switched Ethernet, the capability of data transmission affects its performance and reliability. After summarizing the influence factors of Ethernet service capability, this paper focuses on the time delay oriented reliability model and analysis method. Based on the operational mechanism analysis of Avionics Full Duplex Switched Ethernet (AFDX), this paper emphasizes on the main factors that affect the data transmission capability, viz. the traffic shaping delay and scheduling delay. With the token bucket principle, this paper carries out the traffic shaping to decrease the sudden traffic disturbance. Based on First Come First Service (FCFS) strategy, this paper provides the appropriate service and controls the multiple virtual links in real time. Combining the traffic shaping delay and adjustment delay to traditional reliability model, this paper establishes the integrated reliability model to evaluate the reliability of AFDX.