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针对AFDX(Avionics Full Duplex Switched Ethernet)网络关键技术——交换机实时调度算法,提出一种保证速率的优先级实时调度算法(PRTRG,Priority Real Time sched-uling algorithm based on Rate-Guaranteed),并运用网络演算理论分析了此调度算法的实时性.在AFDX网络典型配置下,与(FIFO,First In First Out)结果进行分析对比,证明PRTRG算法有效地减少了高优先级数据的端到端延迟上界,同时保证了低优先级数据端到端延迟的确定性,并且阻止了数据流拥塞的扩散,在交换机内部实现了流量隔离.
According to the real-time switch scheduling algorithm of AFDX (Avionics Full Duplex Switched Ethernet), a priority real-time sched-uling algorithm based on Rate-Guaranteed (PRTRG) The real-time performance of this scheduling algorithm is analyzed by the calculus theory.A typical AFDX network configuration is compared with the results of (First In First Out) FIFO to prove that the PRTRG algorithm effectively reduces the end-to-end delay upper bound of high priority data , While ensuring certainty of end-to-end delay of low-priority data and preventing the proliferation of traffic congestion, enabling traffic isolation within the switch.