论文标题
资源有效的HAPS-RIS启用了超越细胞通信
Resource-Efficient HAPS-RIS Enabled Beyond-Cell Communications
论文作者
论文摘要
将来，城市地区将遇到大量渴望能力的设备。仅依靠地面网络为所有UES服务将是一种成本感知的方法。因此，随着预期的供求不匹配，将不支持几个UE。为了为剩下的UE提供服务，我们采用了节能且具有成本效益的超越细胞通信方法，该方法在高空平台站（HAPS）上使用可重构的智能表面（RIS）。特别是，未支撑的UE将通过安装在RIS安装的HAPS连接到专用控制站（CS）。提出了一个新颖的资源优化优化问题，可最大化连接的UES数量，同时最大程度地减少CS和RI所消耗的总功率。由于所得问题是混合企业非线性程序（MINLP），因此开发了低复杂性两阶段算法。数值结果表明，所提出的算法以连接的UES和资源效率（RE）的百分比优于基准方法。同样，结果表明，与HAPS大小相比，连接的UES的数量对CS发射功率更敏感。
In the future, urban regions will encounter a massive number of capacity-hungry devices. Relying solely on terrestrial networks for serving all UEs will be a cost-ineffective approach. Consequently, with the anticipated supply and demand mismatch, several UEs will be unsupported. To offer service to the left-out UEs, we employ an energy-efficient and cost-effective beyond-cell communications approach, which uses reconfigurable intelligent surfaces (RIS) on a high-altitude platform station (HAPS). Particularly, unsupported UEs will be connected to a dedicated control station (CS) through RIS-mounted HAPS. A novel resource-efficient optimization problem is formulated that maximizes the number of connected UEs, while minimizing the total power consumed by the CS and RIS. Since the resulting problem is a mixed-integer nonlinear program (MINLP), a low-complexity two-stage algorithm is developed. Numerical results demonstrate that the proposed algorithm outperforms the benchmark approach in terms of the percentage of connected UEs and the resource-efficiency (RE). Also, the results show that the number of connected UEs is more sensitive to transmit power at the CS than the HAPS size.
