Wireless Communication Channel Management for 6G Networks Applying Reconfigurable Intelligent Surface

In this paper, we have presented a wireless communication channel management technique for the future generation wireless communication systems using reconfigurable intelligent surfaces (RIS). It consists of numerous numbers of reflecting unit-cells which reflect the incident signal from the base stations with desired phase shift to superimpose with the non-reflected and reflected signals with a destructive way to prevent detrimental interference. The RIS matrix of phase-shift matrix could be optimized via reflected signal towards explicit directions and an effective optimization of phase-shift is a potential requirement to improve the wireless communication network’s performance substantially. Nearly in all the circumstances, wireless network covering from the base station to RIS and RIS to the users are cascaded channel state information (CSI) with dual hops. The wireless communication channel between the base station and user (i.e., direct channel) could be accomplished by adjusting RIS in absorption mode employing conventional channel estimation techniques. Further, its impact over spectral and energy efficiency are elaborated with its potential research challenges.