摘要
为解决全双工交换以太网(AFDX)网络中事件触发机制导致关键数据流不具备完全确定性的问题,从满足航天器的数据传输网络时间确定性要求出发,将时间触发机制引入AFDX,提出了一种时间触发航空电子全双工交换数据调度算法(TTAFDX)。AFDX网络中的原有数据被划分为时间触发数据和AFDX数据,以满足航天器中数据传输的高实时性、高可靠性要求。仿真实验结果表明:TTAFDX调度算法可实现时间触发数据的零抖动和零丢包,传输时延在毫秒级别,满足对时间触发数据的时间确定性和可靠性需求。
In Avionics Full Duplex switched Ethernet(AFDX),the event triggering mechanism may cause critical data flow to be incomplete.To satisfy the time deterministic requirements of the data transmission network of spacecraft,the Time-Triggered(TT)mechanism was introduced into AFDX and a Time-triggered Avionics Full Duplex Switched Ethernet(TTAFDX)scheduling algorithm was proposed.To realize the real-time and high reliability data transmission in the spacecraft,the AFDX data was divided into time-triggered data and AFDX data.The simulation results showed that the TTAFDX scheduling algorithm achieved zero jitter and zero packet loss of time-triggered data,and the transmission delay was at the millisecond level.The TTAFDX scheduling algorithm can satisfy the time determinability and reliability requirements for time-triggered data.
作者
李文江
赵利霞
张文
刘强
LI Wenjiang;ZHAO Lixia;ZHANG Wen;LIU Qiang(Science and Technology on Communication Networks Laboratory,The 54 th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang 050081,China;School of Computer Science&Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;Chengdu Yangchen Wulian Tianxia Technology Co.,Ltd.,Chengdu 611731,China)
出处
《载人航天》
CSCD
北大核心
2020年第5期598-605,共8页
Manned Spaceflight
基金
中国电子科技集团第五十四研究所通信网信息传输与分发技术重点实验室开放课题基金(KX162600026)。
