Abstract: 6G mobile communication technology is the focus of the new generation of network communication technology, and it involves the core technical fields of China's continuous digital, networked, and intelligent development. Based on the trend of 6G research, combined with high, medium and low spectrum requirements and communication processing capabilities of bandwidth above 10 GHz, this article focuses on 6G key candidate technologies, the terahertz technology that is easier to increase the capacity according to the needs of the scene, and the intelligent reflective surface that improves the management space spectrum efficiency. This paper studies the orbital angular momentum of the new electromagnetic wave dimension, full-duplex communication with multiplied spectrum efficiency and visible light communication with years of research foundation, and analyzes the prospects of the integration of new technology blockchain, artificial intelligence and 6G network.

Key words: 6G wireless, TeraHz communication, orbital angular momentum, full duplex communication