基于时间窗的AFDX端系统调度策略设计实现  

Design and Implementation of AFDX End System Scheduling Strategy Based on Time Window

作　　者：范毓洋 肖洪 李子航 FAN Yuyang;XIAO Hong;LI Zihang(Civil Aviation University of China,Tianjin 300000 China;Xidian University Xi'an,710000 China)

机构地区：[1]中国民航大学,天津300000 [2]西安电子科技大学,西安710000

出　　处：《电光与控制》2023年第1期109-112,119,共5页Electronics Optics & Control

基　　金：航空科学基金(20182667009)。

摘　　要：AFDX引入虚拟链路实现物理带宽资源的逻辑分隔时,数据帧的异步到达和多路复用输出会造成虚拟链路的时延抖动现象,并最终导致流量端到端延迟分析的不确定性。针对AFDX数据帧传输抖动、时延波动的确定性问题,设计了基于时间窗的AFDX端系统调度策略,该方法可以有效减小数据帧的传输抖动,并提供确定性。对该调度策略进行了分析和仿真验证,结果表明该调度策略可以对端系统数据发送端的最差情况抖动做出有效的约束,提高整个AFDX的确定性及可靠性。Avionics Full Duplex Switched Ethernet(AFDX)introduces virtual link to realize logical separation of physical bandwidth resources.The asynchronous arrival and multiplexing output of data frames may cause the delay jitter of virtual link which eventually leads to the uncertainty of end-to-end delay analysis of traffic.Aiming at the deterministic problem of AFDX data frame transmission jitter and delay fluctuation this paper designs an AFDX end system scheduling strategy based on time window which can effectively reduce the transmission jitter of data frame and provide certainty.The analysis and simulation of the scheduling strategy show that the scheduling strategy can effectively restrict the worst-case jitter of the data transmitter and improve the certainty and reliability of the whole AFDX network.

关 键 词：航空电子全双工交换式以太网 调度策略 网络与交换 

分 类 号：V243[航空宇航科学与技术—飞行器设计]