Redes 6G empoderadas por superficies inteligentes reconfigurables: Simulación de comunicaciones inalámbricas asistidas por superficies inteligentes reconfigurables asumiendo la existencia de un link directo.Redes 6G empoderadas por superficies inteligentes reconfigurables: Simulación de comunicaciones inalámbricas asistidas por superficies inteligentes reconfigurables asumiendo la existencia de un link directo.

Abstract

Recently, academia and industry have joined forces to introduce the 6G (sixth generation) technology paradigm, which is expected to be its global appearance in 2030. It is anticipated that 6G will provide enormous data rates (on the order of Tera bps) and latencies much lower than its predecessor, 5G (fifth generation). For 6G to become a reality in the future, some candidate technologies have been identified in the state-of-the-art. Within the 6G ecosystem, we can highlight visible light communications, cell-free massive multiple-input multiple-output (MIMO), Tera Hertz, and reconfigurable intelligent surfaces (RISs). In particular, RIS technology allows for the first time in the history of mobile communications to control the wireless channel according to the network design needs. In other words, RIS brings intelligence to the physical layer level to improve the performance of future communications systems.

Based on the above, this project focuses on analyzing and comparing the performance of a wireless system assisted with RIS and a traditional system that does not use this technology. For this purpose, a system model composed of three nodes (transmitter-Tx, receiver-Rx) and a RIS which assists communication is assumed. In addition, it is considered that there is a line of sight between Tx-Rx, which is modeled through the Rician channel. To assess the system's performance, metrics widely used in communications theory are used, such as Bit Error Rate (BER), average capacity (AC), and the outage probability (OP). These metrics will be obtained by varying different network parameters, including the number of elements in the RIS, the phase design error of the RIS, and the short- and long-scale fading severity. It is worth mentioning that, in order for the proposed systems to be as real as possible, the wireless channel specifications given for outdoor environments in the 3GPP (3rd generation partnership project) will be used. Finally, it will be identified in which scenarios RIS technology offers advantages over the traditional system, as well as some key insights about the possible use cases of RIS in 6G.