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文章围绕AFDX的传输协议,深入分析了虚链路调度算法,针对AFDX端系统虚链路的调度效率,提出了一种AFDX静态优先级自适应触发返回调度算法SPATR。运用Network Calculus理论和方法,对提出算法进行理论评估,并构建仿真环境进行仿真验证。仿真结果表明,与经典算法AVLSP相比,SPATR调度算法可以有效减小紧急数据的延迟抖动,具备了良好的实时性和稳定性,能够较好满足航空数据的传输要求。
This paper focuses on the transmission protocol of AFDX and analyzes the virtual link scheduling algorithm in detail. According to the scheduling efficiency of virtual link in AFDX end system, this paper proposes an AFDX static priority adaptive triggering return scheduling algorithm SPATR. Using Network Calculus theory and method, the algorithm is evaluated theoretically and a simulation environment is constructed for simulation verification. Simulation results show that compared with the classical algorithm AVLSP, the SPATR scheduling algorithm can effectively reduce the delay jitter of emergency data, has good real-time and stability, and can better meet the requirements of aviation data transmission.