Method for designing non-orthogonal multiple access beam width of unmanned aerial vehicle

Abstract

In an unmanned aerial vehicle auxiliary communication network based on non-orthogonal multiple access, a beam width design method capable of meeting ultra-reliable low-time-delay communication is provided. In order to realize ultra-reliable low-delay transmission, the error probability of transmission is minimized by properly reducing the beam width of the unmanned aerial vehicle. Because the usergrouping method can reduce the coverage of the user-free area by making the unmanned aerial vehicle cover only the users in each group, the minimization of the beam width is realized. Therefore, on the basis of the scene, two user grouping algorithms based on unmanned aerial vehicle assisted communication are used. The first type is the traditional K-Means algorithm. However, the condition of a single user group occurs sometimes in a means algorithm, and spectrum resources cannot be effectively shared. The second type is an improved K-Means algorithm. The algorithm can ensure that more than two users exist in each group, and has good performance in the aspect of solving the problems considered in the invention. After user grouping, we design an unmanned aerial vehicle beam width coveragemethod containing all users in the group for each group of users, and design a beam width calculation method based on user positions for each group of users, so as to further minimize the beam width and solve the optimization problem.

Description

technical field [0001] The invention relates to an ultra-reliable and low-delay transmission design for realizing non-orthogonal multiple access of an unmanned aerial vehicle in a communication network between an unmanned aerial vehicle and a ground user. To be precise, by jointly optimizing the UAV beamwidth and the number of packets, under the specific delay conditions of ultra-reliable and low-latency, the error probability of the system can meet the limit of ultra-reliable and low-latency transmission, which belongs to the field of wireless communication. technology. Background technique [0002] A new technological revolution centered on artificial intelligence is changing the way we live, work and communicate. A new generation of unprecedented services and applications has emerged, such as driverless vehicles and drone-based deliveries, as well as personalized assistants based on artificial intelligence. To address increasingly diverse services and applications, 5G-r...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing UAV beam direction is perpendicular to the ground and the ground user communication network cannot effectively reduce the beam width, the present invention proposes a design method that can effectively reduce the beam width, that is, through the user Carry out grouping so that the UAV beam only needs to cover each group of users, and reduce the beam width by reducing the coverage area of ​​the no-user area. At the same time, for each group of users, design a beam width design method based on user location to achieve Further reduction in beamwidth

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