论文标题
通过渠道知识图进入环境感知的6G通信
Towards Environment-Aware 6G Communications via Channel Knowledge Map
论文作者
论文摘要
本文提出了渠道知识图（CKM）的概念，作为对环境意识无线通信的推动者。 CKM是一个特定于网站的数据库，标记为发射机和/或接收器的位置，其中包含任何与渠道相关的信息，可用于增强环境意识，促进甚至促进复杂的实时通道状态信息（CSI）获取。因此，通过为超高容量，极低的潜伏期和超质量连通性的目标靶向6G网络，预计CKM将发挥重要作用，通过为巨大增加的渠道维度和训练开销带来的实践挑战提供潜在的解决方案。在本文中，首先讨论了CKM实现的环境意识的动机，然后是建立和利用CKM的关键技术。特别是，有人强调，CKM特别吸引了四种频道类型：尚未到达位置的频道，非合件节点的通道，具有较大尺寸的通道以及具有严重硬件/处理限制的通道。提出了两项具有广泛数值结果的案例研究，以证明CKM启用了环境感知通信的巨大潜力。
This article proposes the concept of channel knowledge map (CKM) as an enabler towards environment-aware wireless communications. CKM is a site-specific database, tagged with the locations of the transmitters and/or receivers, that contains whatever channel-related information useful to enhance environmental-awareness and facilitate or even obviate sophisticated real-time channel state information (CSI) acquisition. Therefore, CKM is expected to play an important role for 6G networks targeting for super high capacity, extremely low latency, and ultra-massive connectivity, by offering potential solutions to practical challenges brought by the drastically increased channel dimensions and training overhead. In this article, the motivations of environmental-awareness enabled by CKM are firstly discussed, followed by the key techniques to build and utilize CKM. In particular, it is highlighted that CKM is especially appealing for four channel types: channels for yet-to-reach locations, channels for non-cooperative nodes, channels with large dimensions, and channels with severe hardware/processing limitations. Two case studies with extensive numerical results are presented to demonstrate the great potential of environment-aware communications enabled by CKM.
