Time-division duplex (TDD) and frequency-division duplex (FDD) are mainly used in commercial new radio (NR) deployments, where the time- or frequency-domain resources are split between downlink (DL) and uplink (UL). Full duplex (FD) will enable 5G-advanced and 6G systems to go beyond TDD and FDD operation into a new duplexing mode that leverages the benefits of both TDD/FDD deployments. It achieves higher throughput and lower latency while enabling flexible UL/DL scheduling. However, there are several challenges that need to be overcome to enable FD operation in large-scale system deployment, including intranode and internode [user equipment (UE) and next-generation node B (5G base station)] interference along with intercarrier interference. In this article, we present solutions to mitigate self-interference (SI) and cross-link interference (CLI) in 5G-advanced/6G systems, provide system-level evaluations, and discuss the outcome of Third Generation Partnership Project (3GPP) study item on duplexing evolution. We introduce the concept of subband FD (SBFD) as an effective solution for a macro network to achieve the key features of FD, such as latency reduction and UL link budget improvement. Finally, we present the field test results for the performance of world-first SBFD prototype of high transmit power massive-multi-input-multioutput (MIMO) macro network.

中文翻译：

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子带全双工大规模部署网络设计和权衡


时分双工 (TDD) 和频分双工 (FDD) 主要用于商业新无线电 (NR) 部署，其中时域或频域资源在下行链路 (DL) 和上行链路 (UL) 之间划分。全双工 (FD) 将使高级 5G 和 6G 系统超越 TDD 和 FDD 操作，进入一种新的双工模式，充分利用 TDD/FDD 部署的优势。它实现了更高的吞吐量和更低的延迟，同时支持灵活的 UL/DL 调度。然而，要在大规模系统部署中实现 FD 操作，需要克服一些挑战，包括节点内和节点间 [用户设备 (UE) 和下一代节点 B（5G 基站）] 干扰以及载波间干扰。在本文中，我们提出了减轻 5G-advanced/6G 系统中的自干扰 (SI) 和交叉链路干扰 (CLI) 的解决方案，提供系统级评估，并讨论第三代合作伙伴项目 (3GPP) 研究的成果关于双工进化的项目。我们引入子带 FD (SBFD) 的概念，作为宏网络的有效解决方案，以实现 FD 的关键功能，例如延迟减少和 UL 链路预算改善。最后，我们展示了世界首个高发射功率大规模多输入多输出（MIMO）宏网络SBFD原型性能的现场测试结果。