generation (1G) analogue systems to the 5G online systems, progressively includes greater frequencies, wider bandwidths, and faster data rates. The 5G base units are designed to utilize advanced technologies such as massive multiple-input multiple-output (MIMO) [1], mmWave, and ultra-dense networking (UDN) [2]. These innovations allow the ground stations to accommodate up to 64 transceiver links with a greater number of antenna components. At present, there are fully developed commercialized 5G infrastructure solutions equipped having 128 antennas [3]. HUAWEI has taken the lead in introducing a huge MIMO base station with 384 antennas. Furthermore, 5G can facilitate augmented reality (AR) and virtual reality (VR). Despite the substantial advancements it brings beyond 4G connectivity technology, 5G possesses certain limitations. Presently, there exist apps and solutions that demand superior communication reliability surpassing the potential of 5G. These include worldwide coverage, transfer of data at extremely high rates, minimal delay, densely connected networks, precise positioning, highly trustworthy and secure connections, low power consumption, high energy effectiveness, and pervasive creativity. Therefore, the limitations and challenges of the 5G technology are part of the motivation behind the need for higher and faster level of connectivity such as the 6G. For low transmission speed, the end-to-end (E2E) latency must be below 1 millisecond, and for high speed, the latency ought to be in the microsecond range. Furthermore, to achieve high-precision placement, the exactness of the placement must be enhanced to attain centimetre-level accuracy in outdoor environments and sub-centimetre-level accuracy in indoor environments. Greater dependability is needed in a variety of innovative scenarios, including vehicle-to-everything (V2X) and mobile data centres. Energy consumption is a significant concern for many different applications; hence, it is necessary to decrease power spending and boost network energy efficiency by a factor of 100. Furthermore, a significant multitude of sophisticated applications necessitate communication systems to possess a heightened level of intellect. The progression of wireless communication systems follows a recurring pattern with a duration of around ten years. Currently, the study on 6G is at its initial phase of investigation, and multiple nations and standards organizations worldwide have declared their intentions to perform an investigation on 6G such as Finland [4], China [5], Japan [6], Germany [7], USA [8], Korea [9], and the EU [10]. The world's first major 6G research initiative was initiated in 2018 by the Finnish government. In the U.S., 6G development was suggested in 2019, and the terahertz (THz) spectrum was made available for research by the Federal Communications Commission (FCC). The 6G vision for Japan was unveiled in April 2020 by the Ministry of Internal Affairs and Telecommunications. The 6G timetable for South Korea was announced in January 2020, with commercialization anticipated by 2028. The European Union has established the 6G Smart Networks and Solutions Business Organization to promote and develop 6G networks and products. All of the aforementioned plans include vigorous 6G preparatory work. For instance, in September 2019, an initial 6G white paper [4] was published by Finland's 6G flagship agency. The article outlined the concept of \"ubiquitous wireless intelligence\" and focused on the main drivers, obstacles, and associated scientific concerns of 6G. Additionally, following that, a number of white papers were published [11] that addressed many facets of 6G, including networking, ML uses, enterprise, edge intellect, protection, and more. In a white paper published in [12], the authors examined the transition from 5G to 6G and predicted the essential components that will make up 6G. Furthermore, a number of companies have conducted preliminary 6G investigations, including UNISOC [13], China Unicom [14], HUAWEI [15], and China Mobile [16].