An Unmanned Aerial Vehicle-Assisted Cellular Data Traffic Offloading and Secure Transmission Scheme

doi:10.7652/xjtuxb202102014

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An Unmanned Aerial Vehicle-Assisted Cellular Data Traffic Offloading and Secure Transmission Scheme

更新时间：2025-07-09

- An Unmanned Aerial Vehicle-Assisted Cellular Data Traffic Offloading and Secure Transmission Scheme
- Vol. 55, Issue 2, Pages: 121-128(2021)
- 作者机构：
  
  西北工业大学网络空间安全学院,西安,710072
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202102014
  CLC： TN929
- Online First：10 February 2021，
  
  Published：2021
- 稿件说明：
移动端阅览
An Unmanned Aerial Vehicle-Assisted Cellular Data Traffic Offloading and Secure Transmission Scheme[J]. 2021, 55(2): 121-128.
DOI：

An Unmanned Aerial Vehicle-Assisted Cellular Data Traffic Offloading and Secure Transmission Scheme[J]. 2021, 55(2): 121-128. DOI： 10.7652/xjtuxb202102014.

摘要

为解决传统蜂窝网络中边缘用户上行通信链路质量较差且容易遭到窃听的问题

提出了一种移动无人机辅助的流量卸载和保密传输方案。首先根据空地视距信道特性

建立了基于接收信号强度阈值的信道接入机制

解决了用户传输模式选择问题; 其次

根据空地信道接入时延、无人机飞行高度和速度

确定了任意时刻无人机链路的覆盖范围; 然后

利用随机几何理论

给出了平均可达速率解析式和安全容量评估方法; 最后

通过仿真实验验证所提方案和理论结果的有效性

并给出关键参数的最优化配置方案。仿真结果表明

与传统蜂窝网络相比

所提出的基于移动无人机的组网方案能够在保证用户公平性的基础上

使网络上行通信速率提高约40%

安全容量提高约70%。

Abstract

A cruising unmanned aerial vehicle(UAV)-assisted traffic offloading and secrecy transmission scheme is proposed to solve the problem that the uplink quality of cell-edge users is poor and easy to be eavesdropped in traditional cellular networks. Firstly

according to the line-of-sight propagation characteristics of the air-to-ground channel

a channel access mechanism based on the threshold of the received signal strength is established to solve the problem of user transmission mode selection. Then

the coverage region of UAV’s link at any time is determined by considering important factors such as channel access delay

flight altitude and speed of the UAV. Additionally

an analytic formula of average accessible rate is derived and an appropriate method to evaluate the network secrecy rate is given by using the random geometry theory. Finally

the validity of the proposed scheme and theoretical results is verified by simulation experiments

and the optimal settings of key parameters are presented to achieve the optimum network performances. Simulation results and comparisons with traditional cellular networks show that the proposed mobile UAV-based networking scheme increases the uplink rate by about 40% and the security capacity by about 70% on the basis of ensuring the users fairness.

关键词

Keywords

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