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Title: Software-Defined Reconfigurable Intelligent Surfaces: From Theory to End-to-End Implementation
Authors: Liaskos, Christos K.
Mamatas, Lefteris
Pourdamghani, Arash
Tsioliaridou, Ageliki
Ioannidis, Sotiris
Pitsillides, Andreas
Schmid, Stefan
Akyildiz, Ian F.
Type: Article
Subjects: FRASCATI::Engineering and technology
FRASCATI::Engineering and technology::Other engineering and technologies
Keywords: 6G
deployment optimization
intelligent metasurfaces
programmable wireless environments (PWEs)
protocol stack
reconfigurable intelligent surfaces (RISs)
smart radio environments (SREs)
software-defined networking (SDN)
theoretical foundations
Issue Date: 2022
Source: Proceedings of the IEEE
Volume: 110
Issue: 9
First Page: 1466
Last Page: 1493
Abstract: Programmable wireless environments (PWEs) utilize internetworked intelligent metasurfaces to transform wireless propagation into a software-controlled resource. In this article, the interplay is explored between the user devices, the metasurfaces, and the PWE control system from the theory to the end-to-end implementation. This article first discusses the metasurface hardware and software, covering the complete workflow from the user device initialization to its final service via the PWE. Furthermore, to be compatible with the 5G and 6G wireless systems, the software-defined networking (SDN) paradigm is extended to achieve scalable internetworking and central control in PWE deployments with multiple metasurfaces and multihop communication. Subsequently, the set of SDN foundations is exploited in order to abstract the physics behind PWEs and a theoretical framework is established to describe and manipulate them in an algorithmic form. This can lead to smart radio environments that are readily accessible from various engineering disciplines, facilitating their integration into existing networks, wireless systems, and applications. This article is concluded by outlining strategies for the optimal placement of metasurfaces within a PWE-controlled space, open challenges in PWE security, specialized SDN integration issues, and theoretical problems toward the graph-driven modeling of PWEs.
ISSN: 0018-9219
Other Identifiers: 10.1109/JPROC.2022.3169917
Appears in Collections:Department of Applied Informatics

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