A Comprehensive Survey of 6G Wireless Communications
Yang Zhao, Wenchao Zhai, Jun Zhao, Tinghao Zhang, Sumei Sun, Dusit, Niyato, Kwok-Yan Lam

TL;DR
This survey comprehensively reviews 6G wireless communications, highlighting its technological advancements, challenges, security concerns, and potential applications like smart healthcare and cities, emphasizing its expected superior performance over 5G.
Contribution
It provides an in-depth overview of 6G technologies, challenges, security measures, and future applications, offering a holistic understanding of the next-generation wireless system.
Findings
6G will have higher transmission rates and broader coverage than 5G.
AI and intelligent surfaces are key technologies for 6G development.
Security and privacy are critical challenges in 6G deployment.
Abstract
While fifth-generation (5G) communications are being rolled out worldwide, sixth-generation (6G) communications have attracted much attention from both the industry and the academia. Compared with 5G, 6G will have a wider frequency band, higher transmission rate, spectrum efficiency, greater connection capacity, shorter delay, broader coverage, and more robust anti-interference capability to satisfy various network requirements. This survey presents an insightful understanding of 6G wireless communications by introducing requirements, features, critical technologies, challenges, and applications. First, we give an overview of 6G from perspectives of technologies, security and privacy, and applications. Subsequently, we introduce various 6G technologies and their existing challenges in detail, e.g., artificial intelligence (AI), intelligent surfaces, THz, space-air-ground-sea integrated…
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Taxonomy
TopicsAdvanced Wireless Communication Technologies · Energy Harvesting in Wireless Networks · Wireless Communication Security Techniques
