The use of in-band full-duplex (FD) enables nodes to simultaneously transmit and receive on the same frequency band, which challenges the traditional assumption in wireless network design. The full-duplex capability enhances spectral efficiency and decreases latency, which are two key drivers pushing the performance expectations of next-generation mobile networks. In less than ten years, in-band FD has advanced from being demonstrated in research labs to being implemented in standards, presenting new opportunities to utilize its foundational concepts. Some of the most significant opportunities include using FD to enable wireless networks to sense the physical environment, integrate sensing and communication applications, develop integrated access and backhaul solutions, and work with smart signal propagation environments powered by reconfigurable intelligent surfaces. However, these new opportunities also come with new challenges for large-scale commercial deployment of FD technology, such as managing self-interference, combating cross-link interference in multi-cell networks, and coexistence of dynamic time division duplex, subband FD and FD networks.

翻译：带内全双工（FD）技术使节点能够在同一频段上同时进行发射和接收，这挑战了无线网络设计中的传统假设。全双工能力可提升频谱效率并降低时延，这两者正是推动下一代移动网络性能预期的关键驱动力。短短不到十年间，带内全双工技术已从实验室验证阶段发展到标准实施阶段，为其基础概念的运用开辟了新机遇。其中最重要的机遇包括：利用全双工使无线网络感知物理环境、集成感知与通信应用、开发集成接入与回传方案，以及与可重构智能表面驱动的智能信号传播环境协同工作。然而，这些新机遇也为全双工技术的大规模商用部署带来了新挑战，例如：管理自干扰、应对多小区网络中的交叉链路干扰，以及动态时分双工、子带全双工与全双工网络的共存问题。