This letter is the first part of a three-part tutorial focusing on rate-splitting multiple access (RSMA) for $\mathbf{6}$G. As Part I of the tutorial, the letter presents the basics of RSMA and its applications in light of $\mathbf{6}$G. To begin with, we first delineate the design principle and basic transmission frameworks of downlink and uplink RSMA. We then illustrate the applications of RSMA for addressing the challenges of various potential enabling technologies and use cases, consequently making it a promising next generation multiple access (NGMA) scheme for future networks such as $\mathbf{6}$G and beyond. We briefly discuss the challenges of RSMA and conclude the letter. In continuation of Part I, we will focus on the interplay of RSMA with integrated sensing and communication, and reconfigurable intelligent surfaces, respectively in Part II and Part III of this tutorial.

翻译：这封信是三部分教学的第一部分,其重点是对美元进行分率的多重访问(RSMA),重点是对美元进行分率的多重访问(RSMA),作为教学的第一部分。作为教学的第一部分,本信介绍了RSMA及其应用的基础,并参照了$=mathbf{6}G。首先,我们首先阐述了下行连接和上端连接RSMA的设计原则和基本传输框架。然后,我们介绍了RSMA在应对各种潜在赋能技术和使用案例的挑战方面的应用,从而使它成为未来网络如$\mathbf{6}G等有希望的下一代多重访问(NGMA)计划。我们简要讨论了RSMA的挑战并结束了该信。在第一部分的继续,我们将分别在本辅导的第二部分和第三部分中侧重于RSMA与综合遥感和通信的相互作用,以及可重新配置的智能表面。