Table 2.

Comparison between 5G and 6G technologies.

5G	6G
Sub-6GHz band crowded	Ultra-fast connection (THz)
Limited capacity for new type of communications	Fully immersive extended reality (XR) experience and high definition holographic communication
Cellular communications	Cell-free massive MIMO
Infrastructure	Ubiquitous connectivity
Security problems	Quantum communication and Blockchain
Low latency	High reliability and ultra-low latency
Existing algorithms for modeling channel information	Deep learning as solution for improvement