Guest Editors:

Wei XU, Southeastern University, China

Yongming HUANG, Purple Mountain Laboratories, China

Wei WANG, Huazhong University of Science and Technology, China

Fusheng ZHU, Guangdong Communications & Networks Institute, China

Xinsheng JI, Information Engineering University, China

下一代无线通信网络，即6G网络，将支撑并服务于未来多样化的智能应用。这些服务和应用对6G网络的覆盖范围、传输速率、可靠性与时延等方面提出了更高要求。相较于传统技术路线，新兴的人工智能技术能够更好地帮助6G网络达到上述性能要求。近年来，智能6G领域的新技术不断涌现。新技术不仅在空频覆盖规模上进行了拓展，也激发了许多关键使能技术的出现。因此，SCIENCE CHINA Information Sciences 在2023年66卷第3期组织出版了“智能6G频谱、覆盖与使能技术专题” (Special Topic: Spectrum, Coverage, and Enabling Technologies for Intelligent 6G)，其中收录了 6 篇具有原创性、权威性和洞察力的文章。

综述文章“Pushing AI to wireless network edge: an overview on integrated sensing, communication, and computation towards 6G”介绍了通感算一体化(ISCC)与人工智能技术的融合应用，其中重点介绍了集中式边缘学习，联邦边缘学习与边缘推理三个应用领域的代表技术。

Zhu G X, Lyu Z H, Jiao X, et al. Pushing AI to wireless network edge: an overview on integrated sensing, communication, and computation towards 6G. Sci China Inf Sci, 2023, 66(3): 130301, https://doi.org/10.1007/s11432-022-3652-2

综述文章“SpectrumChain: a disruptive dynamic spectrum sharing framework for 6G”提出了一种基于分层区块链的动态频谱共享(DSS)框架。通过利用区块链去中心化、透明性和可追溯性的优势，DSS框架可以获得更宽的频谱以及更短的时延。

Wu Q H, Wang W, Li Z G, et al. SpectrumChain: a disruptive dynamic spectrum-sharing framework for 6G. Sci China Inf Sci, 2023, 66(3): 130302, https://doi.org/10.1007/s11432-022-3692-5

综述文章“Coverage enhancement for 6G satellite-terrestrial integrated networks: Performance metrics, constellation configuration and resource allocation” 总结了卫星覆盖的性能指标和关键技术，提出适用于6G非均匀业务需求的网络结构特征，并研究了该场景下智能资源调度和星地协同计算方法。

Sheng M, Zhou D, Bai WG, et al. Coverage enhancement for 6G satellite-terrestrial integrated networks: performance metrics, constellation configuration and resource allocation. Sci China Inf Sci, 2023, 66(3): 130303, https://doi.org/10.1007/s11432-022-3636-1

综述文章“Reconfiguring wireless environments via intelligent surfaces for 6G: reflection, modulation, and security”详细阐述了可重构智能表面（RIS）的反射、调制两个功能对无线通信系统的性能提升，并通过典型案例的具体研究说明了RIS对安全通信的帮助。

Xu J D, Yuen C, Huang C W, et al. Reconfiguring wireless environment via intelligent surfaces for 6G: reflection, modulation, and security. Sci China Inf Sci, 2023, 66(3): 130304, https://doi.org/10.1007/s11432-022-3626-5

研究论文“Full-spectrum cell-free RAN for 6G systems: system design and experimental results”提出了一种拓展的无蜂窝网络部署架构，讨论了该架构下的信道信息获取、收发端设计等关键技术，并搭建原型系统对该架构进行了试验验证。

Wang D M, You X H, Huang Y M, et al. Full-spectrum cell-free RAN for 6G systems: system design and experimental results. Sci China Inf Sci, 2023, 66(3): 130305, https://doi.org/10.1007/s11432-022-3664-x

观点文章“6G extreme connectivity via exploring spatiotemporal exchangeability”揭示了MIMO无线传输在极低时延条件下存在信道容量崩塌效应，提出空时二维信道编码技术实现6G极致连接要求，并对其发展前景进行展望。

You X H. 6G extreme connectivity via exploring spatiotemporal exchangeability. Sci China Inf Sci, 2023, 66(3): 130306, https://doi.org/10.1007/s11432-022-3598-4