5G全双工综合接入和回程NR：分析和原型测量
Full Duplex Integrated Access and Backhaul for 5G NR: Analyses and Prototype Measurements
摘要：
3GPP已经研究了用于5G新无线电（NR）的集成接入和回程（IAB）框架作为有线回程的具有成本效益的替代方案。该框架的一个有前途的解决方案是集成全双工（FD）技术，以提高频谱效率并有效利用网络资源（称为FD IAB）。然而，FD IAB提出了重大的技术挑战，例如IAB框架中的自干扰（SI），这可能会对FD IAB的可行性产生怀疑。在本文中，我们提供了一个关于FD IAB框架及其支持技术的简短教程。然后，我们数值评估和讨论的链路级SI减少和系统级的下行链路吞吐量性能的FD IAB。最后，我们使用28 GHz的传播域SI抑制的硬件原型测量来验证FD IAB的可行性。我们的数值评估和原型测量证实，FD IAB是5G NR的一个有前途的框架。
英文摘要：
Integrated access and backhaul (IAB) frameworks for 5G new radio (NR) as a cost-effective alternative to the wired backhaul have been investigated by 3GPP. A promising solution for this framework is the integration of full duplex (FD) technologies to enhance the spectral efficiency and make an efficient use of the network resources-termed FD IAB. However, FD IAB presents significant technical challenges, such as self-interference (SI) in the IAB framework, which may cast doubt over the feasibility of FD IAB. In this article, we present a brief tutorial of the FD IAB framework and its enabling technologies. We then numerically evaluate and discuss the link-level SI reduction and the system-level downlink throughput performance of the FD IAB. Finally, we validate the feasibility of FD IAB using 28 GHz hardware prototype measurements of propagation-domain SI suppression. Our numerical evaluations and prototype measurements confirm that the FD IAB serves as a promising framework for 5G NR.
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