COLoRIS: Localization-agnostic Smart Surfaces Enabling Opportunistic ISAC in 6G Networks
Journal:
arXiv
Published Date:
Jun 11, 2024
Abstract
The integration of Smart Surfaces in 6G communication networks, also dubbed
as Reconfigurable Intelligent Surfaces (RISs), is a promising paradigm change
gaining significant attention given its disruptive features. RISs are a key
enabler in the realm of 6G Integrated Sensing and Communication (ISAC) systems
where novel services can be offered together with the future mobile networks
communication capabilities. This paper addresses the critical challenge of
precisely localizing users within a communication network by leveraging the
controlled-reflective properties of RIS elements without relying on more
power-hungry traditional methods, e.g., GPS, adverting the need of deploying
additional infrastructure and even avoiding interfering with communication
efforts. Moreover, we go one step beyond: we build COLoRIS, an Opportunistic
ISAC approach that leverages localization-agnostic RIS configurations to
accurately position mobile users via trained learning models. Extensive
experimental validation and simulations in large-scale synthetic scenarios show
5% positioning errors (with respect to field size) under different conditions.
Further, we show that a low-complexity version running in a limited
off-the-shelf (embedded, low-power) system achieves positioning errors in the
11% range at a negligible +2.7% energy expense with respect to the classical
RIS.
