Unmanned aerial vehicle cooperation and trajectory optimization method for throughput improvement

A drone and throughput technology, applied in radio transmission systems, electrical components, transmission systems, etc., can solve problems such as unbalanced distribution of users, difficulty in balancing each cell, poor channel link status, etc., and achieve spectrum resources Allocate, improve resource utilization efficiency, and improve the effect of spectrum resource allocation

Active Publication Date: 2021-03-23
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Faced with the surge of data traffic, traditional cellular networks have the following problems: First, GBS (ground base stations) in traditional cellular networks are usually deployed statically, making it difficult to flexibly handle the traffic offloading of edge users in communication hotspots problems; secondly, the distance between cell edge users and ground base stations in hotspot areas is relatively long, and the channel link status is poor; finally, it is difficult for ground base stations to flexibly adapt to the scene of sudden traffic increase
However, in the prior art, there are few studies on considering multiple cells and establishing cooperative division between multiple GBSs and UAV air base stations, which makes it impossible to fully utilize the auxiliary role of UAV air base stations and effectively improve Edge Region User Throughput
Moreover, in the existing research on UAV-assisted heterogeneous networks, UAVs are usually deployed on the edge of a single cell or multiple independent cells to improve the service quality of edge users, but in hot spots such as squares and stadiums, multiple The distribution of users in a cell is often uneven. The existing UAV-assisted cellular network strategy is difficult to balance each cell. In a cell with dense users, the quality of data transmission service is poor and the resource utilization rate is low.

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  • Unmanned aerial vehicle cooperation and trajectory optimization method for throughput improvement
  • Unmanned aerial vehicle cooperation and trajectory optimization method for throughput improvement
  • Unmanned aerial vehicle cooperation and trajectory optimization method for throughput improvement

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Embodiment Construction

[0034] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0035] The UAV cooperation and trajectory optimization method for throughput improvement provided by the present invention jointly considers the multi-cell base station and the UAV air base station cooperation, designs a method for optimizing coverage area division and bandwidth resource allocation, and optimizes the UAV in the air. Flight trajectories at the edge of multiple cells to improve the quality of service in densely populated cells and improve resource utilization efficiency.

[0036] In the UAV-assisted cellular network scenario, GBSs and UAVs of multiple cells cooperate to divide the coverage area, and the cell base stations respectively serve users within their coverage radius, while users in the edge area are served by UAVs. In order to avoid interference between GBS and UAV, the present invention divides the entire frequency band range ...

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Abstract

The invention provides an unmanned aerial vehicle cooperation and trajectory optimization method for throughput improvement. The unmanned aerial vehicle cooperation and trajectory optimization methodis used for optimizing resource allocation of an unmanned aerial vehicle auxiliary cellular network. According to the method, one unmanned aerial vehicle flies periodically in the edge area of the cell, communication service is provided for users in the edge area of the cell, and the bandwidth allocation proportion of the unmanned aerial vehicle and the base stations, the service coverage radius of each base station and the flight path of the unmanned aerial vehicle are established and jointly optimized; and a target function for maximizing the minimum average throughput of the users in the edge area is decoupled into three sub-problems to be solved, so that a resource allocation result and an unmanned aerial vehicle flight path which meet requirements are obtained. According to the invention, the unmanned aerial vehicle trajectory can be adjusted according to the user density of each cell, balanced assistance for multiple cells is realized, the service quality of cells with dense users is improved, and the resource utilization efficiency is improved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, relates to the technology of UAV air base station auxiliary cellular network, and specifically relates to a method for UAV cooperation and trajectory optimization oriented to throughput improvement. Background technique [0002] In recent years, the application of mobile communication technology in daily life has become more and more extensive, and the data traffic has also increased at a relatively rapid rate. Faced with the surge of data traffic, traditional cellular networks have the following problems: First, GBS (ground base stations) in traditional cellular networks are usually deployed statically, making it difficult to flexibly handle the traffic offloading of edge users in communication hotspots Problems; secondly, the distance between the cell edge users and the ground base station in the hotspot area is relatively long, and the channel link status is poor; finally,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185
CPCH04B7/18506
Inventor 张鹤立李杨纪红李曦
Owner BEIJING UNIV OF POSTS & TELECOMM
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