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 and products, 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送和接收，这挑战了无线网络设计中的传统假设。全双工能力提升了频谱效率并降低了延迟，这两者正是推动下一代移动网络性能预期提升的关键驱动力。在不到十年间，带内全双工已从实验室演示发展到标准和产品中的实际应用，为其基础概念带来了新的应用机遇。其中最显著的机会包括：利用FD使无线网络具备物理环境感知能力、集成感测与通信应用、开发集成接入与回传解决方案，以及协同由可重构智能表面赋能的智能信号传播环境。然而，这些新机遇也伴随着FD技术大规模商业部署的新挑战，例如管理自干扰、对抗多小区网络中的跨链路干扰，以及动态时分双工、子带全双工与全双工网络的共存问题。