基于空间Poisson点过程的无人机异构网络中断性能评估  

Outage Performance Evaluation of Drone HetNet Based on Spatial Poisson Point Process

作　　者：郭艺轩 贾向东 曹胜男[1] 郝振超 殷家祥 GUO Yixuan;JIA Xiangdong;CAO Shengnan;HAO Zhenchao;YIN Jiaxiang(College of Computer Science and Engineering,Northwest Normal University,Lanzhou,Gansu 730070,China;Wireless Communication Key Lab of Jiangsu Province,Nanjing University of Posts and Telecommunications,Nanjing,Jiangsu 210003,China)

机构地区：[1]西北师范大学计算机科学与工程学院,甘肃兰州730070 [2]南京邮电大学江苏省无线通信重点实验室,江苏南京210003

出　　处：《信号处理》2022年第3期536-542,共7页Journal of Signal Processing

基　　金：国家自然科学基金(61861039)。

摘　　要：考虑无人机空间分布特性给城市热点区域网络部署与设计带来的挑战,基于随机几何理论构建了空间无人机异构网络框架。首先,通过三维部署空中小基站和二维部署地面宏基站的方式对网络进行混合干扰建模,借助最大偏置接收功率级联准则来实现各基站的负载均衡;此外,考虑无人机通信特性,将空对地信道假设为Nakagami-m衰落模型;最后通过用户与各基站的级联概率以及通信距离的分布得出网络中断概率的数学解析表达式。仿真结果表明,三维密集部署无人机的方案可以更加真实地反映无人机热点服务场景下的中断性能,同时,适当设置偏置因子和提高无人机密度可以有效改善网络性能。Considering the challenges brought by the spatial distribution of drones to the deployment and design of urban hotspot area networks,a heterogeneous network framework for space drones is constructed based on stochastic geometry theory. Firstly,the mixed interference model is built by three-dimensional deployment of air small base stations and twodimensional deployment of ground macro base stations,and the load balance of each base station is achieved by using the maximum bias received power association strategy;In addition,considering the communication characteristics of drones,the air to ground channel is assumed as Nakagami-m fading model;Finally,the mathematical expression of network outage probability is obtained through the distribution of association probability and communication distance between users and base stations. The simulation results show that the scheme of three-dimensional dense deployment of drones can more realistically reflect the interruption performance of drones in hot service scenarios. At the same time,the network performance can be effectively improved by properly setting the bias factor and increasing the density of drones.

关 键 词：无人机通信 三维泊松点过程 异构网络 Nakagami-m 中断概率 

分 类 号：TN929.5[电子电信—通信与信息系统]