Hierarchical Message Scheduling Modeling in Heterogeneous Time-Triggered Ethernet Using Software Defined Network

In the near future, wireless network will have the good performance as well as wired network, especially 5th generation cellular network (5G). So safety-critical service and time-critical service can be performed well in wireless. Namely, the time-triggered Ethernet (TTE) can be realized in wireless network. In this paper, we built a heterogeneous time-triggered Ethernet with the wired network in the avionics platform and the wireless network between avionics platforms. Owe to platform mobility, software defined network was introduced to manage the message scheduling table for time-triggered traffic. To reduce the processing time of the message scheduling table, fog computing was introduced. It leads that scheduling table is divided into two levels, inner-platform level and inter-platform level. Subsequently, we proposed a hierarchical message scheduling using Satisfiability Modulo Theories (SMT) to realize hierarchical message scheduling table. Finally, experiment analyzed the performance of the hierarchical message scheduling, compared with global scheduling algorithm. The results show that the hierarchical message scheduling need consume less time and resources than the other.