Dynamic priority admission control of virtual link in AFDX based on OpenFlow

To design a more flexible admission control of virtual link (VL) in avionics full duplex switched Ethernet (AFDX), OpenFlow is introduced to AFDX, and the corresponding models are built including network model, message model and traffic model. The end-to-end delay bounds of priority VL in AFDX based on OpenFlow are analyzed with the help of the network calculus theory. Combining the particle swarm optimization, the dynamic priority admission control algorithm is proposed. The analytical results show that compared with the dynamic non-priority admission control method and the traditional static priority assignment method, the end-to-end delays of messages using the proposed algorithm are reduced by 49.2% and 26.4%. And the proposed algorithm can improve the utilization of the network resources by providing a more flexible admission control of VL. In the end, the analytical results are verified by the simulation. The proposed algorithm provides a reference for improving the performance of admission control and enhances the communication efficiency and real-time performance of AFDX.