Abstract: With the rapid development of avionics system,a large number of devices and sensors are connected to the in-plane network,which makes the architecture of the in-plane communication network complex and heavy.Wireless communication network can effectively solve many problems,such as complicated wiring,heavy weight and difficult line fault detection.However,wireless network still has certain limitations in real-time and reliability,which is precisely the most concerned problem of airborne interconnection system.In this paper,the existing wired communication network architecture is analyzed,a hybrid communication network architecture of wireless access network and wired backbone network is designed according to its communication characteristics.The candidate wireless communication schemes are evaluated and selected.The fixed time slot of wireless network access is improved to dynamic allocation according to traffic,the mathematical model of dynamic time slot allocation is established,and the TDMA period and the optimal time slot allocation strategy are designed.Finally,a typical airborne network task shows that the strategy can improve the network utilization rate from 36.5% to 41.8% on the premise of ensuring that the system is schedulable,which verifies the effectiveness of the method.

Key words: Avionics wireless communication networks, Ultra-wideband communication, Time division multiple access, Time slot allocation, Access control