论文标题
启用缓存的无人机hetnets访问xhaul覆盖范围分析和最佳资源分区
Cache Enabled UAV HetNets Access xHaul Coverage Analysis and Optimal Resource Partitioning
论文作者
论文摘要
我们研究了一个城市无线网络，其中启用了启用高速公路的无人机点（UAV-APS）和UAV基础站（UAV-BSS），以向地面上的用户提供更高的吞吐量和临时覆盖范围。通过陆地基站（TBSS）或通过Xhaul链接通过陆地基站（TBSS）或Backhaul启用的UAV-BSS，将用户数据路由用户数据将用户数据路由到核心网络。首先，我们在访问和Xhaul链接中得出关联概率。有趣的是，我们表明，为了最大程度地提高视线（LOS）无人机（UAV）协会，在阈值后，无人机部署的致密性可能不会受益。然后，我们分别获得访问链接中典型用户和Xhaul链接中标记的UAV-AP的信号与干扰噪声比（SINR）的覆盖率。通过共同考虑成功访问和Xhaul传输的概率以及成功的缓存概率，使用SINR覆盖范围分析来表征成功的内容交付概率。我们从数值上优化了访问和Xhaul链接之间的频率资源分布，以最大程度地传达给用户的内容。对于在无人机上给定的存储容量，我们的研究规定了网络运营商最佳带宽分区因素和有关部署无人机的尺寸规则。
We study an urban wireless network in which cache-enabled UAV-Access points (UAV-APs) and UAV-Base stations (UAV-BSs) are deployed to provide higher throughput and ad-hoc coverage to users on the ground. The cache-enabled UAV-APs route the user data to the core network via either terrestrial base stations (TBSs) or backhaul-enabled UAV-BSs through an xHaul link. First, we derive the association probabilities in the access and xHaul links. Interestingly, we show that to maximize the line-of-sight (LoS) unmanned aerial vehicle (UAV) association, densifying the UAV deployment may not be beneficial after a threshold. Then, we obtain the signal to interference noise ratio (SINR) coverage probability of the typical user in the access link and the tagged UAV-AP in the xHaul link, respectively. The SINR coverage analysis is employed to characterize the successful content delivery probability by jointly considering the probability of successful access and xHaul transmissions and successful cache-hit probability. We numerically optimize the distribution of frequency resources between the access and the xHaul links to maximize the successful content delivery to the users. For a given storage capacity at the UAVs, our study prescribes the network operator optimal bandwidth partitioning factors and dimensioning rules concerning the deployment of the UAV-APs.
