Track optimization method for unmanned aerial vehicle relay broadcast communication system

Abstract

The invention discloses a track optimization method for an unmanned aerial vehicle relay broadcast communication system. The method comprises the steps of establishing the unmanned aerial vehicle relay broadcast communication system; establishing a three-dimensional rectangular coordinate system; transmitting signals to an unmanned aerial vehicle relay node by a fixed base station node; broadcasting the signals to user nodes by the unmanned aerial vehicle relay node; receiving the broadcasted signals by the user nodes; determining interruption probabilities of all user nodes; determining the interruption probability of the user node with the highest interruption probability; and establishing an unmanned aerial vehicle track optimization model based on a maximum-minimum criterion and searching the optimum course angle. The method has the effects that according to the method, influences of links from an unmanned aerial vehicle to the base station on the system performance are taken into consideration and the method has better completeness. Compared with an unmanned aerial vehicle position optimization method for the unmanned aerial vehicle relay broadcast communication system, the method has the advantages that a fixed wing unmanned aerial vehicle is taken as a relay communication platform, a position of the unmanned aerial vehicle can be dynamically adjusted by a relay unmanned aerial vehicle according to a change of an environment, and the method has better self-adaptivity and wider application range.

Description

Technical field [0001] The invention belongs to the technical field of UAV relay broadcast communication, in particular to a method for optimizing the track of an UAV relay broadcast communication system. Background technique [0002] In recent years, with the reduction of the manufacturing cost of unmanned aerial vehicles (UAV) and the miniaturization of avionics equipment, UAVs have been widely used in military and civilian fields. Typical applications include: battlefield reconnaissance and relay Communication, environmental monitoring, geological survey and emergency rescue, etc. Relay communication is an important area of ​​UAV application. Compared with traditional fixed relay communication, UAV relay communication has the advantages of long communication distance, convenient deployment, flexible and controllable relay location, quick system construction, and maintenance cost. Because of the advantages of low cost and many other aspects, UAV relay communication has gained ...

AI Technical Summary

Problems solved by technology

[0008] The basic idea of ​​the performance optimization method for the relay broadcast communication system of the rotor UAV is: in order to realize the communication between the base station node and the user node, it needs to be relayed through the UAV. However, this method mainly has two problems: as a relay platform, the rotor UAV has high power consumption and short battery life. On the other hand, the actual application environment is complex and changeable. This method hovers the rotor drone at a fixed relay position and does not have the ability to adapt to environmental changes

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