An unmanned aerial vehicle base station bandwidth and track joint optimization method with limited pushing power

Abstract

The invention discloses an unmanned aerial vehicle base station bandwidth and track joint optimization method with limited pushing power. The method is suitable for an unmanned aerial vehicle emergency communication scene. According to the invention, a single unmanned aerial vehicle is used as an air base station; in a scene of providing downlink transmission services for a plurality of users in aprocess of flying from a starting point to a terminal point, under the condition that the pushing power and the flight time of the unmanned aerial vehicle are limited; the minimum average rate of each user in the system is maximized by adjusting the flight path and the user bandwidth distribution; a non-convex optimization problem is established according to the moving position of the unmanned aerial vehicle, the pushing power and the bandwidth constraint, and the non-convex optimization problem is converted and solved by using a block coordinate descent and continuous convex approximation method, so that the minimum average rate of each user in the system is maximized, and the energy and frequency band resource utilization rate is maximized. The method has important guiding significancefor the unmanned aerial vehicle communication system under the condition that the pushing power and the total bandwidth are limited.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method for jointly optimizing bandwidth and trajectory of a UAV base station with limited power. Background technique [0002] At present, the establishment and realization of the communication network mainly depends on ground base stations or relays and other fixed communication equipment. Although these devices can provide relatively stable communication requirements, their immobile nature leads to certain limitations in deployment and high costs. In engineering practice, natural disasters may cause serious damage to these infrastructures, making it impossible for the affected area to communicate with the outside world in time. At this time, the UAV can be used as an air base station to assist the existing communication system. In these scenarios, the high mobility and low cost of UAVs have great advantages. At present, under the condition of lim...

AI Technical Summary

Problems solved by technology

At present, under the condition of limited driving power of UAV, it is still blank to use it as an air base station and use FDMA (frequency division multiple access) technology to provide communication services for multiple users.

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