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高速数据总线技术是航空电子中的关键技术之一.IEEE-1394是一种串行高速数据总线,已经成功应用于航空电子中.其异步传输模式保证数据传输的可靠性,广泛用于命令、状态数据的传输.为解决IEEE-1394总线异步传输过程中的传输延时、吞吐量以及总线利用率等问题,基于确定与随机Petri网(DSPN,Deterministic and Stochastic Petri Nets),建立了IEEE-1394总线异步传输的节点模型,并基于模型仿真分析了其异步传输系统的性能.通过仿真研究得到了IEEE-1394异步传输系统吞吐量、平均等待时间等性能指标同数据包大小和数据到达速率的关系,并给出了IEEE-1394异步传输数据包到达速率极限的计算方法.
High-speed data bus technology is one of the key technologies in avionics.IEEE-1394 is a serial high-speed data bus that has been successfully used in avionics.Asynchronous transmission mode to ensure the reliability of data transmission is widely used in command, State data transmission.To solve the problems of transmission delay, throughput and bus utilization during the asynchronous transmission of IEEE-1394 bus, IEEE-1394 Bus asynchronously, and analyzes the performance of asynchronous transmission system based on model simulation.The simulation results show the performance of IEEE-1394 asynchronous transmission system such as throughput, average waiting time and the relationship between packet size and data arrival rate , And gives the calculation method of IEEE-1394 asynchronous transmission packet arrival rate limit.