Unmanned aerial vehicle base station deployment method for supplementing coverage by utilizing reflected beams

Abstract

The invention provides an unmanned aerial vehicle base station deployment method for supplementing coverage by using reflected beams. Specifically, when the direct beam between the unmanned aerial vehicle and the user is not blocked, the direct beam is used for coverage, and when the direct beam is blocked, the reflected beam is used for coverage supplement, so that the coverage potential of the reflected beam is exerted, the coverage area of the unmanned aerial vehicle is expanded, and the outage probability of the user is effectively reduced. The method comprises the following steps: modeling and analyzing the influence of a building on millimeter wave propagation of the unmanned aerial vehicle, selecting a first-order reflection path with the shortest path length for service, deriving aprobability density expression of a vertical projection length s serving a first-order reflection beam, and finally obtaining the coverage rate of an unmanned aerial vehicle base station; substituting the actual propagation environment parameters of the target coverage area, such as the density and the average height of the building, into the coverage rate expression, obtaining the unmanned aerial vehicle deployment height and density with the optimal coverage performance according to the change relationship of the coverage rate with the unmanned aerial vehicle deployment parameters, and providing guidance for the deployment of an actual unmanned aerial vehicle base station.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and in particular to the design of a deployment method of an unmanned aerial vehicle (UAV) base station network. Background technique [0002] Future networks will face the huge challenge of users' high coverage and high capacity requirements. In the existing terrestrial cellular network, the deployment cycle of ground base stations is long and the cost is high, making it difficult to meet the service requirements of high dynamic scenarios. With significant advancements in UAV (Unmannedaerial vehicle, UAV) technology, such as better power management techniques, increased payload capacity, longer flight duration, etc., UAVs can be used for a variety of purposes, such as filming , surveillance, transportation, communication, etc. In terms of communication, due to the high dynamic characteristics of drones and the line-of-sight transmission link between drones and ground use...

AI Technical Summary

Problems solved by technology

[0005] Because drones can be deployed in the air and can achieve a high LOS probability, one analysis method assumes that the drone and the user must be connected through a direct link, but in a dense urban environment, due to the occlusion of buildings, There is a large part of the area on the ground that cannot be covered by the UAV LOS link, so it is unreasonable to directly assume that the UAV and the user can be connected through the LOS link; another analysis method takes into account the blocking effect of the building, if A blocked direct link is considered a user outage, an assumption that does not take into account the coverage potential of reflected beams

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