故障区域UAV辅助无线网络中以用户为中心的协作方案
A User-Centric Cooperative Scheme for UAV Assisted Wireless Networks in Malfunction Areas
摘要：
应急通信是无人机在未来通信网络中的一个重要应用。本文考虑了这样一种情况下，无人机被雇用到一个故障区（建模为一个圆盘），所有的地面基站（BS）发生故障。故障区域外的地面基站被建模为一个齐次泊松点过程（HPPP）。特别地，提出了一种以用户为中心的协作方案来服务于故障区域中的UE。根据用户设备（UE）与无人机和最近地面BS的连接，将故障区域划分为三个区域，即无人机区域、协作区域和最近地面BS区域，其中UE分别仅由无人机、无人机和最近地面BS两者以及最近地面BS服务。可以通过协作参数$δ$来调整每种类型的区域大小。通过严格的推导，得到了故障区域中UE所达到的覆盖概率的表达式。为了提供公平的比较，通过考虑系统吞吐量和服务BS的数量来定义的归一化频谱效率（NSE）被用作性能评估的标准。数值结果验证了分析结果的准确性，也证明了所提出的计划的优越性能。
英文摘要：
A promising application of unmanned aerial vehicles (UAVs) to the future communication networks is to address emergency communications. This paper considers such a scenario where a UAV is employed to a malfunction area (modeled as a circular disc) in which all ground base stations (BSs) break down. The ground BSs outside the malfunction area are modelled as a homogeneous Poisson point process (HPPP). Particularly, a user-centric cooperative scheme is proposed to serve the UEs in the malfunction area. According to the user equipment's (UE's) connections to the UAV and the nearest ground BS, the malfunction area is divided into three regions, namely the UAV region, the cooperation region and the nearest ground BS region, in which the UEs are served by the UAV only, both the UAV and the nearest ground BS, and the nearest ground BS, respectively. The region size of each type can be adjusted by a cooperation parameter $δ$. Through rigorous derivations, an expression for the coverage probability achieved by the UE in the malfunction area is obtained. In order to provide a fair comparison, the normalized spectral efficiency (NSE) which is defined by taking both system throughput and the number of serving BSs into consideration, is used as a criterion for the performance evaluation. Numerical results are presented to verify the accuracy of the analytical results and also to demonstrate the superior performance of the proposed scheme.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
