The 3rd Generation Partnership Project started the study of Release 18 in 2021. Artificial intelligence (AI)-native air interface is one of the key features of Release 18, where AI for channel state information (CSI) feedback enhancement is selected as the representative use case. This article provides an overview of AI for CSI feedback enhancement in 5G-Advanced. Several representative non-AI and AI-enabled CSI feedback frameworks are first introduced and compared. Then, the standardization of AI for CSI feedback enhancement in 5G-advanced is presented in detail. First, the scope of the AI for CSI feedback enhancement in 5G-Advanced is presented and discussed. Then, the main challenges and open problems in the standardization of AI for CSI feedback enhancement, especially focusing on performance evaluation and the design of new protocols for AI-enabled CSI feedback, are identified and discussed. This article provides a guideline for the standardization study of AI-based CSI feedback enhancement.
翻译：第3代伙伴关系项目于2021年开始研究第18版,人工智能(AI) -- -- 本土空气界面是第18版的主要特征之一,该版选择了AI, 用于加强频道状态信息的反馈,作为代表使用的例子,这一条概述了AI,用于加强5G-高级的CSI反馈;首先介绍并比较了几位代表非AI和AI支持的CSI反馈框架;然后详细介绍了5G-高级的5G-高级的加强CSI反馈的AI标准化;首先介绍并讨论了5G-Adced加强CSI反馈的AI范围;然后,查明并讨论了AI加强CSI反馈标准化方面的主要挑战和公开问题,特别是侧重于绩效评估和设计新的AI支持CSI反馈协议;该条为以AI为基础的加强基于CSI反馈的标准化研究提供了指导方针。
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