With the standardization and commercialization completed at an unforeseen pace for the 5th generation (5G) wireless networks, researchers, engineers and executives from the academia and industry have turned their attention to new candidate technologies that can support the next generation wireless networks enabling more advanced capabilities in sophisticated scenarios. Explicitly, the 6th generation (6G) terrestrial wireless network aims to providing seamless connectivity not only to users but also to machine type devices for the next decade and beyond. This paper describes the progresses moving towards 6G, which is officially termed as "international mobile telecommunications (IMT) for 2030 and beyond" in the International Telecommunication Union Radiocommunication Sector (ITU-R). Specifically, the usage scenarios, their representative capabilities, the supporting technologies and spectrum are discussed, and the future opportunities and challenges are highlighted.

翻译：随着第五代（5G）无线网络以超预期速度完成标准化与商业化，学术界和工业界的研究人员、工程师及管理者已将目光转向能够支持下一代无线网络的新候选技术，这些技术将在复杂场景中实现更先进的能力。具体而言，第六代（6G）地面无线网络旨在为未来十年及更长时间内实现不仅面向用户、也包括机器类型设备的无缝连接。本文描述了向6G迈进的最新进展——该技术在国际电信联盟无线电通信部门中正式被命名为"IMT for 2030及未来"。具体讨论了使用场景、代表性能力、支撑技术及频谱，并展望了未来机遇与挑战。