The sixth-generation (6G) wireless communication network is expected to integrate the terrestrial, aerial, and maritime communications into a robust network which would be more reliable, fast, and can support a massive number of devices with ultra-low latency requirements. The researchers around the globe are proposing cutting edge technologies such as artificial intelligence (AI)/machine learning (ML), quantum communication/quantum machine learning (QML), blockchain, tera-Hertz and millimeter waves communication, tactile Internet, non-orthogonal multiple access (NOMA), small cells communication, fog/edge computing, etc., as the key technologies in the realization of beyond 5G (B5G) and 6G communications. In this article, we provide a detailed overview of the 6G network dimensions with air interface and associated potential technologies. More specifically, we highlight the use cases and applications of the proposed 6G networks in various dimensions. Furthermore, we also discuss the key performance indicators (KPI) for the B5G/6G network, challenges, and future research opportunities in this domain.

第六代（6G）无线通信网络有望将地面、空中和海上通信集成到一个强大的网络中，该网络将更加可靠、快速，并且可以支持具有超低延迟要求的海量设备。全球的研究人员正在提出尖端技术，例如人工智能（AI）/机器学习（ML）、量子通信/量子机器学习（QML）、区块链、太赫兹和毫米波通信、触觉互联网、非正交多址接入（NOMA）、小蜂窝通信、雾/边缘计算等作为实现超5G（B5G）和6G通信的关键技术。在本文中，我们详细概述了 6G 网络维度、空中接口和相关潜在技术。更具体地说，我们重点介绍了所提出的 6G 网络在各个方面的用例和应用。此外，我们还讨论了 B5G/6G 网络的关键性能指标 (KPI)、挑战以及该领域的未来研究机会。