Dimensioning an Indoor SISO RIS-system: Approximations and Equivalence Models

TL;DR

This paper develops closed-form approximations and equivalence models for RIS-assisted communication systems, enabling simplified analysis of performance gains and resource allocation in multi-user networks.

Contribution

It introduces novel approximation formulas and equivalence models that relate RIS-assisted network performance to scaled systems, aiding design and analysis.

Findings

Performance gains can be approximated with closed-form expressions

RIS-assisted network performance is comparable to scaled systems

Method for assigning RIS to multiple communication pairs

Abstract

We provide closed-form approximations to the performance gain achieved in a RIS-assisted communication. We then consider a network deployment of RIS and Transmitter-Receiver pairs and use these approximate expressions to provide equivalence models which state that the performance of a RIS-equipped network is similar to the performance of an appropriately spatially scaled system. We provide a way of assigning available RIS to assist communication between several transmitter-receiver pairs. Several such approximations are expected to spawn from this study, with more clarity on structural aspects of the gains achieved in RIS-assisted communications.