Research On Anti-collision Technology Based On 5G Between UAV And Civil Aircraft

With the rapid development of the drone industry,there are more and more drone events,which pose serious threats to the flight safety of aircraft and the safety of ground personnel.Therefore,China has enacted relevant regulations to define the scope of the separation of airspace to limit the flight of UAV(Unmanned Aerial Vehicle).UAV and aircraft cannot share airspace,which greatly wastes limited airspace and further inhibits the development of UAV.In order to break the limitation of drone flight in isolated airspace and ensure that there is no collision between drone and aircraft in shared airspace,this paper studies the anti-collision technology of drone based on 5G,which can not only makes full use of airspace,but also promote the development of the drone industry.The anti-collision technology has the requirements of high positioning accuracy and low communication delay of the UAV.Therefore,combined with the development status of positioning and communication technology in China,the GPS/BDS combined positioning and the 5G mobile communication is applied to the UAV after analyzing.The anti-collision technology firstly exchanges the flight dynamic information between the UAV and the civil aircraft through 5G mobile communication,secondly establishes the dynamic electronic grid under normal flight conditions through dynamic electronic grid model,thirdly predicts the flight conflict,then according to the actual conflict situation,dynamic electronic grids with larger radius are established for the drone and aircraft.Finally,when the relative distance between the drone and the civil aircraft is equal to the sum of the dynamic electronic grid radii of them,a reminder or the alarm command is given to the drone to remind or alert the drone to take the collision avoidance maneuver to avoid collision.Based on the AHMEMCR collision model,this paper firstly establishes the collision risk model of UAV and aircraft considering the airspace factor,and then takes advantage of the four factors of human,aircraft,weather and management to improve the model.Finally,the model is used to verify the rationality of the dynamic electronic grid radius of the UAV and aircraft on the emergency collision avoidance phase.The anti-collision technology based on dynamic electronic grid is feasible by verifying the radius of the dynamic electronic grid established by the drone and the aircraft in the event of a flight conflict.The technology which limits the range of drones by establishing dynamic electronic grilles for drones and aircraft not only ensures that the drone and the aircraft are flying safely,but also breaks the current pattern that drones can only fly in isolated airspace.