6G: Envisioning the Key Technologies, Applications and Challenges

Abstract

In 2030, 6G is going to bring remarkable revolution in communication technologies as it will enable Internet of Everything. Still many countries are working over 5G and B5G has yet to be developed, while some research groups have already initiated projects on 6G. 6G will provide high and sophisticated QoS e.g. virtual reality and holographic communication. At this stage, it is impossible to speculate every detail of 6G and which key technologies will mark 6G. The wide applications of ICT, such as IoT, AI, blockchain technology, XR (Extended Reality) and VR (Virtual Reality), has created the emergence of 6G technology. On the basis of 5G technique, 6G will put profound impact over ubiquitous connectivity, holographic connectivity, deep connectivity and intelligent connectivity. Notably, research fraternity should focus on challenges and issues of 6G. They need to explore various alternatives to meet desired parameters of 6G. Thus, there are many potential challenges to be envisioned. This review study outlines some future challenges and issues which can hamper deployment of 6G. We subsequently define key potential features of 6G to provide the state of the art of 6G technology for future research. We have provided a review of extant research on 6G. In this review, technology prospects, challenges, key areas and related issues are briefly discussed. In addition, we have provided technologies breakdown and framework of 6G. We have shed light over future directions, applications and practical considerations of 6G to help researchers for possible breakthroughs. Our aim is to aggregate the efforts and eliminate the technical uncertainties towards breakthrough innovations for 6G.

Strategies for Reducing Communication Latency in 6G Networks

“…• Effective Data Transmission using Intelligent Radio: Unlike previous generations, 6G can have segregated transceiver devices so as to facilitate self updation. Various research investigations on suspicious activities and signal jamming in transmission of data will provide secure and smart data transmission in 6G [33,34]. • Smart City Implementation Integrated with Massive IoT: Futuristic development of smart cities will mostly require highly reliable and secure system capable of managing huge amount of data in multiple domains such as parking, congestion management, transportation, health-care, utilities, etc.…”

6G: A comprehensive survey on technologies, applications, challenges, and research problems

“…Therefore, to overcome these challenges, the sixth generation (6G) cellular network aims to inherently tailor the performance requirements to each IoT application/scenario with an adequate technological trend especially 6G is meant to improve the thing‐to‐thing communication 2 . The 6G is going to bring this revolution to connect (enable) everything worldwide using extreme communication techniques 3 . A convergence of the state‐of‐the‐art technologies that is been used in previous cellular systems (eg, small‐cell densification, higher rates, and massive antenna devices) will become the key attractions of 6G.…”

Enabling Underwater Wireless Power Transfer towards Sixth Generation (6G) Wireless Networks: Opportunities, Recent Advances, and Technical Challenges

“…However, one key objective of 6G is to feature ubiquitous coverage by incorporating underwater wireless communications to support global coverage [9,10]; one of the challenges facing underwater wireless communications is the delivery of high energy performance, most especially from the perspective of pervasive utilization of the global coverage wireless communications and with an eco-system of many minute sensors. Furthermore, extending the battery-recharge capacity of IoT devices and sensor networks underwater must be addressed in line with the notion that their capabilities and abilities to deal with sophisticated multimedia signal processing rise in quantum leaps as their power consumption increases [11][12][13]. Thus, energy-efficient underwater wireless communications are considered a hot research topic for the coming years.…”