A Joint Optimization Method for UAV Base Station Bandwidth and Trajectory with Power Constraint

Abstract

The invention discloses a joint optimization method for UAV base station bandwidth and trajectory with limited driving power, which is applicable to UAV emergency communication scenarios. In the scenario where a single unmanned aerial vehicle is used as a base station in the air to provide downlink transmission services for multiple users during the process of flying from the starting point to the destination, under the condition that the driving power and flight time of the unmanned aerial vehicle are limited, by adjusting Its flight trajectory and user bandwidth allocation are used to maximize the minimum average speed of each user in the system, and a non-convex optimization problem is established according to the UAV's moving position, driving power and bandwidth constraints, and the non-convex optimization problem is established using block coordinate descent and continuous convex approximation methods. The convex optimization problem is converted and solved, which maximizes the minimum average rate of each user in the system, and then maximizes the utilization of energy and frequency band resources. The invention has important guiding significance for the unmanned aerial vehicle communication system under the condition of limited driving power and total bandwidth.

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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