Workshop 6

Workshop 62023-05-09T18:43:37+00:00

Reconfigurable Intelligent Surfaces from sub-6GHz to THz: Recent Advances and Open Challenges

Tuesday, 6 June 2023, 9:00-10:30/11:00-12:30/14:00-15:30/16:00-17:30, Room J1
  • George C. Alexandropoulos (National and Kapodistrian University of Athens, GR)
  • Halid Hrasnica (Eurescom GmbH, DE)
  • Stefano Buzzi (University of Cassino and Lazio Meridionale, IT)

Motivation and Background

The recent research results confirm that the effective deployment of Reconfigurable Intelligent Surfaces (RISs) as controllable reflection surfaces (as well transmission and reception/sensing) can enhance network coverage for a wide range of frequencies, creating various opportunities for emerging applications, such as localization, sensing, energy efficiency, secrecy, and reduced electromagnetic-field exposure. The RISs can be designed as self-configuring parts of a wireless network infrastructure, adjusting their electromagnetic characteristics in response to dynamic traffic demands and actual propagation characteristics. Besides the research activities world-wide considering various aspects of applications of the RIS technology in frequencies ranging from sub-6GHz to THz, related research is also being conducted in public European projects, such as in the RISE-6G, METAWIRELESS, ARIADNE, TERRAMETA projects, as well as some others from the 5G PPP arena. The purpose of this workshop is to present and discuss the latest research achievements in Europe, as produced by the ongoing projects RISE-6G, METAWIRELESS, ARIADNE, TERRAMETA, and identify future scientific directions and challenges. In particular, the workshop will include presentations (submitted either as extended abstracts or full papers) from these four (4) ongoing projects in RIS modelling and simulators, hardware designs and demos, network integration and RIS optimization algorithms, as well as on future research challenges.


The proposed full-day workshop consists of four (4) conference time slots dedicated to presenting and discussing key technical findings of the four (4) ongoing projects on RISs. The workshop will conclude its content with a panel comprising the project’s technical managers that will the lessons learnt, the open challenges, and the road ahead with the RIS technology in 6G networks from sub-6GHz to THz frequencies.

Session 1 – RIS Modelling and Simulators (1h40min)

  • Presentation #1: “The Vienna system-level simulator for 6G wireless networks with reconfigurable intelligent surfaces,” Le Hao (20min+5min Q&A)
  • Presentation #2: “Ray-tracing-based study of RIS performance in an urban environment,” Joonas Kokkoniemi, Juha Pyhtilä, Pekka Sangi, and Markku Juntti (20min+5min Q&A)
  • Presentation #3: “Simulation scenarios for the assessment of reflective intelligent surfaces in THz backhaul applications,” Bo Kum Jung and Thomas Kuerner (20min+5min Q&A)
  • Presentation #4: “RIS electromagnetic model based on impedance formalism: Validation on practical designs” Gabriele Gradoni, Antonio Clemente, and Raffaele D’Errico (20min+5min Q&A)

Session 2 – Hardware Designs and Demos (1h40)

  • Presentation #5: “Engineering of intelligent reflective surfaces: physical optics and angular stability,” Mohammad Javad (20min+5min Q&A)
  • Presentation #6: “Efficient anomalous reflector design based on array antenna scattering synthesis,” Sravan Vuyyuru (20min+5min Q&A)
  • Presentation #7: “THz RIS for ultra-high rate wireless communications: element design and synthesis,” Sergio Matos (20min+5min Q&A)
  • Presentation #8: “RISE-6G’s RIS Prototypes,” Raffaele D’Errico (20min+5min Q&A)

Session 3 – Network Integration and Optimization (1h30)

  • Presentation #9: “EMF exposure and secrecy spectral efficiency optimization with RISs,” Tommy Svensson (speaker), Dinh-Thuy Phan Huy (20min+5min Q&A)
  • Presentation #10: “Design of wireless links aided by RIS with global reflection constraints,” Robert Kuku Fotock, Alessio Zappone, and Marco Di Renzo (20min+5min Q&A)
  • Presentation #11: Study of optimal RIS position and orientation: From partially to fully illuminated RIS,” Georgios Stratidakis, Sotiris Droulias, and Angeliki Alexiou (20min+5min Q&A)
  • Presentation #12: “Control channel options in wireless systems with reconfigurable intelligent surfaces,” Fabio Saggese, Victor Croisfelt, Kyriakos Stylianopoulos, Radoslaw Kotaba, George C. Alexandropoulos, and Petar Popovski (20min+5min Q&A)

Session 4 – Open Challenges (1h40min)

  • Presentation #13: “Reconfigurable technologies for integrating RIS elements at THz: New approaches and challenges,” Qi Luo (20min+5min Q&A)
  • Presentation #14: “RISE-6G architecture and two key challenges: RIS area and bandwidth of influence,” Vincenzo Sciancalepore (20min+5min Q&A)
  • Panel: “The RIS technology status, trends, and road to standardization,” by the projects’ representatives: Stefano Buzzi, Angeliki Alexiou, Luís Manuel Pessoa, and Vincenzo Sciancalepore (45min)
  • Workshop’s Conclusion (5min)
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