利用数字孪生支持的多无线电微波回传赋能农村地区实现基于5G IAB的FWA
Empowering Rural Areas with Multi-radio Microwave Backhaul Supported by Digital Twin for 5G IAB-based FWA
AI总结：
研究为农村地区提供高容量互联网接入的方案，结合长距离微波、5G IAB和FWA构建多跳网络。针对能耗随跳数增加问题，提出能效微波回传及数字孪生，开发节能策略并求解优化问题，实现降低能耗同时满足数据速率要求。
AI中文摘要：
为实现数字包容，需向农村地区提供高容量互联网接入以支持多种服务和应用。由于光纤部署运营成本高，固定无线接入（FWA）对农村地区更具吸引力，但5G FWA是单跳解决方案，覆盖有限，需要多跳解决方案。本文考虑将长距离微波、5G集成接入与回传（IAB）和FWA结合的统一解决方案，为农村地区提供多跳网络。该网络面临的关键挑战是能耗随跳数增加，现有文献未关注。为此，我们提出基于IAB的FWA的能效微波回传作为物理孪生（PT），开发节能策略优化微波回传的无线电启动、服务、睡眠和唤醒状态，通过在低利用率时降低网络容量运行来最小化能耗。然后，我们提出PT的数字孪生（DT）以提高其性能，利用深度Q学习在DT中求解优化问题，利用优化求解器在PT中求解。仿真结果表明，我们的方法在满足数据速率要求的同时降低了能耗。
英文摘要：
For digital inclusion, high-capacity Internet access should be provided to rural areas to support a range of services and applications. Due to the high operating costs of fiber-optic deployment, Fixed Wireless Access (FWA) is becoming a more attractive internet solution for rural areas. However, 5G FWA is a one-hop solution with limited coverage. A multi-hop solution is needed for wider rural coverage. This work considers a unified solution combining long-haul microwave, 5G Integrated Access and Backhaul (IAB), and FWA to provide a multi-hop network for extended coverage and high network capacity in rural areas. A key challenge for such a network is that energy consumption increases with the number of hops, a problem that has been overlooked in the existing literature. To address this, we propose energy-efficiency microwave backhaul for IAB-based FWA as the Physical Twin (PT). We develop an energy-efficient strategy to optimize radio start-up, serving, sleeping, and wake-up states for microwave backhaul connecting 5G IAB-based FWA serving rural areas. By operating the network at reduced capacity during low utilization, we aim to minimize energy consumption. Then, we present a Digital Twin (DT) of PT to improve its performance. We solve the formulated optimization problem using deep Q-learning in DT and the optimization solver in PT. The simulation results show that our approach satisfies the data rate requirements while reducing energy consumption.
