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Future generations of wireless networks will offer newfangled performance viaunprecedented solutions: the metasurface innovation will drive such arevolution by posing control onto the surrounding propagation environment,always portrayed as a tamper-proof black-box. The RIS technology, envisioned asthe discrete version of a metasurface, can be dynamically configured to alterthe propagation properties of the impinging signals by, e.g., steering thecorresponding beams towards defined directions. This will unlock newapplication opportunities and deliver advanced end-user services. However, thisfascinating solution comes at not negligible costs: RIS require ad-hoc design,deployment and management operations to be fully exploited. In this paper, wetackle the RIS placement problem from a theoretical viewpoint, showcasing alarge-scale solution on synthetic topologies to improve communicationperformance while solving the "dead-zone" problem. Additionally, ourmathematical framework is empirically validated within a realistic indoorscenario, the Rennes railway station, showing how a complex indoor propagationenvironment can be fully disciplined by an advanced RIS installation.

RIS-Aware Indoor Network Planning: The Rennes Railway Station Case