Unmanned aerial vehicle relay Internet of Vehicles secure transmission method based on non-orthogonal multiple access

The invention discloses a unmanned aerial vehicle relay Internet of Vehicles secure transmission method based on non-orthogonal multiple access. The method comprises the following steps of: firstly, constructing a unmanned aerial vehicle relay Internet of Vehicles model based on non-orthogonal multiple access and comprising one base station, one unmanned aerial vehicle and V network edge vehicles; constructing a physical layer security model among the base station, the unmanned aerial vehicle and network edge vehicle nodes based on the unmanned aerial vehicle relay Internet of Vehicles model based on non-orthogonal multiple access; then, based on the unmanned aerial vehicle relay Internet of Vehicles model and the physical layer security model, constructing an unmanned aerial vehicle relay Internet of Vehicles secure information transmission target and optimization conditions; and finally, obtaining a solution through a golden section method and a graph theory based on the unmanned aerial vehicle relay Internet of Vehicles information secure transmission target and optimization conditions, and constructing an unmanned aerial vehicle relay Internet of Vehicles information secure transmission method. Compared with an existing mechanism, on the premise that the information transmission security is guaranteed, the total data transmission rate from the base station to the vehicle in the unmanned aerial vehicle relay Internet of vehicles can be increased.