Research on virtual link layer verification based on AFDX end system

Avionics full duplex switched Ethernet has been widely used in civil aircraft avionics system because of its advantages of low cost, low delay, high reliability, real-time and strong scalability. AFDX terminal system is the interface component between AFDX network and avionics system, which provides high real-time and high reliability communication service for all kinds of avionics equipment. The MAC layer of the end system adopts several key technologies to realize the determinism of AFDX network, so the verification of this layer is very important for the end system. Based on the research of AFDX protocol and the analysis of the functions and key technologies of the virtual link layer of the current AFDX terminal system, this paper makes a verification scheme and carries out a reliable test.