In this survey paper, we first provide insights on the evolution of radio access networks (RANs) through investigating the existing paradigms and future trends towards 6G. We then present the fully-decoupled RAN (FD-RAN), which aligns with the trends by integrating existing paradigms and introducing new features such as physical decoupling of uplink and downlink base stations. We also discuss the key technologies enabled by different architectures for further performance improvement and some open issues. We hope that this survey can stimulate more in-depth research on transforming 6G RAN so as to unleash the power of state-of-the-art technologies and meet higher performance requirements in the future.

中文翻译：

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RAN 架构向 6G 的演进：动机、开发和支持技术


在这份调查论文中，我们首先通过调查 6G 的现有范式和未来趋势，提供有关无线接入网络 (RAN) 演进的见解。然后，我们提出了完全解耦的 RAN（FD-RAN），它通过集成现有范例并引入上下行基站物理解耦等新功能来顺应趋势。我们还讨论了不同架构支持的用于进一步提高性能的关键技术和一些悬而未决的问题。我们希望通过本次调查能够激发对6G RAN改造的更深入研究，从而释放最先进技术的力量，满足未来更高的性能要求。