| 摘要: |
| 在用户数量激增的应急通信场景下，为保证地面用户的通信质量，提出了基于距离约束的用户自适应接入方案。首先采用泊松点距离约束策略(Poisson Point under Distance Constraint,PPDC)对无人机(Unmanned Aerial Vehicle,UAV)的位置进行建模，避免无人机区域重叠带来的干扰问题。其次，引入基站负载传输协议(Base Station Load Transfer Protocol,BSLTP)，当接入基站的用户数量超过给定阈值时，超载用户由无人机提供服务。此外，分别分析了地面基站和无人机的覆盖性能，得到了系统整体覆盖概率，并研究了无人机高度、覆盖半径、激增用户密度对网络覆盖性能的影响。最后，通过仿真验证了理论结果的正确性，且所提部署方案能够有效提升网络覆盖性能。 |
| 关键词: 应急通信 无人机(UAV) 距离约束 泊松点过程(PPP) 覆盖性能 |
| DOI：10.20079/j.issn.1001-893x.221006004 |
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| 基金项目:北京市属高等学校优秀青年人才培养计划项目；北京市自然科学基金-海淀原始创新联合基金(L192022,L212026)；北京市教育委员会科学研究计划项目(KM202011232002)；泛网无线通信教育部重点实验室(BUPT)项目(KFKT-2020105) |
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| Research on Coverage Performance of UAV-assisted Ground Emergency Network with Poisson Point under Distance Constraint |
| WU Yunga,b,YAO Yuanyuan,b,PAN Chunyu |
| (a.School of Information and Communication Engineering;b.Key Laboratory of Modern Measurement & Control Technology,Ministry of Education,Beijing Information Science and Technology University,Beijing 100101,China) |
| Abstract: |
| In order to ensure the communication quality of ground users,a user-adaptive access scheme based on the distance constraint is proposed in the scenario of emergency communication with a large increase in the number of users.Firstly,to avoid the interference caused by the overlapping area of unmanned aerial vehicles(UAVs),Poisson Point under Distance Constraint(PPDC) is proposed to model the location of UAVs.Secondly,the Base Station Load Transfer Protocol(BSLTP) is introduced,and when the number of connecting base station users exceeds a given threshold,the overloaded users are served by UAVs.In addition,the coverage performance of the ground base station and UAV is analyzed,and the overall coverage probability of the system is obtained.The influence of UAVs’ height,coverage radius,and the density of a surge of users on the network performance is analyzed.Finally,the simulation verifies the accuracy of the theoretical results,and the network coverage performance can be effectively improved by the proposed deployment scheme. |
| Key words: emergency communication unmanned aerial vehicles(UAV) distance constraint Poisson point process(PPP) coverage performance |
