Evaluation of Optimal Location of Reconfigurable Intelligent Surface (RIS) and Maximum Achievable Data Rates in RIS-assisted Communication Systems

6G research is actively underway as researchers and engineers are creating the next generation of global wireless systems. The nascent research towards 6G wireless technologies includes physical layer design with candidate waveform, channel models, AI/ML models, RF designs and components at milli meter wave (mmWave) frequency bands and THz frequency bands, RF sensing, non-terrestrial networks, and reconfigurable intelligent surfaces (RIS). RIS is envisioned as a key wireless technology in 6G wireless networks. RIS is an arrangement of array of scattering elements whose properties are dynamically controlled to focus the electromagnetic radio signal towards the receiver. This paper aims to design a deterministic RIS-assisted channel model and evaluate the system performance in the presence of different propagation scenarios considering the channel blockages. It presents the achievable data rates and received signal-to-noise ratio (SNR) at user equipment (UE) for different dimensions of RIS and frequency bands. It also defines the optimal location of RIS for the maximum range between base station (BS) and UE.