A joint optimization method for relay UAV trajectory planning and user access

Abstract

A joint optimization method for relay UAV track planning and user access, which introduces a UAV with storage function as a mobile relay UAV, and jointly optimizes the relay UAV track and cell in a multi-cell network The access strategy of edge users, so as to maximize the information transmission rate of cell edge users. The steps are as follows: First, construct the edge user and rate maximization problem and fix the user access matrix, and convert the track planning sub-problem into a convex problem by scaling to obtain the upper and lower bounds, and solve it to obtain the optimal UAV track; then, fix the UAV track, and obtain the optimal user access matrix by solving the Lagrangian dual function; finally, iterate the above steps to alternately optimize the UAV track and user access matrix until the iterative algorithm converges . The method of the present invention comprehensively considers the optimization of UAV track and user access in the multi-cell relay network, and effectively improves the information transmission rate of multi-cell edge users in the wireless communication network.

Description

technical field [0001] The invention relates to an efficient joint optimization method for relay UAV track planning and user access, which belongs to multi-cell UAV relay communication technology. Background technique [0002] UAV communication is a new type of communication scenario. Due to its high-speed mobility and flexibility, UAV-assisted communication will have broad application prospects in improving network performance. On the one hand, the higher flying altitude of UAVs increases the probability of establishing a line of sight (LoS) link between UAVs and ground equipment, which will further bring about higher communication rates, lower latency and other performance improvements. ; On the other hand, the mobility of drones facilitates their rapid deployment according to dynamic network changes to optimize network performance. At present, there have been many studies on the application scenarios of UAVs: UAVs can be used as mobile base stations in the air to establ...

AI Technical Summary

Problems solved by technology

[0005] Technical problem: In order to solve the problem of user communication quality optimization in the common edge coverage area of ​​multiple cells, this invention proposes an efficient joint optimization method for relay UAV track planning and user access, and obtains the upper and lower bounds by scaling , jointly optimize UAV trajectory and user access, and achieve efficient communication under the premise of satisfying information causality

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