Perpetual reconfigurable intelligent surfaces through in-band energy harvesting: architectures, protocols, and challenges
Reconfigurable intelligent surfaces (RISs) are considered a key enabler of highly energy-efficient 6G and beyond networks. This property arises from the absence of power amplifiers in the structure, in contrast to active nodes, such as small cells and relays. However, a certain amount of power is st...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/402673 |
| Acceso en línea: | https://hdl.handle.net/2117/402673 https://dx.doi.org/10.1109/MVT.2023.3344994 |
| Access Level: | acceso abierto |
| Palabra clave: | Computer network protocols Wireless communications systems Energy consumption Computer architecture Protocols Power demand Channel estimation Wireless communication Impedance Tuning Protocols de xarxes d'ordinadors Comunicació sense fil, Sistemes de Energia -- Consum Àrees temàtiques de la UPC::Informàtica::Arquitectura de computadors |
| Sumario: | Reconfigurable intelligent surfaces (RISs) are considered a key enabler of highly energy-efficient 6G and beyond networks. This property arises from the absence of power amplifiers in the structure, in contrast to active nodes, such as small cells and relays. However, a certain amount of power is still required for RIS operation. To improve their energy efficiency further, we propose the notion of perpetual RISs, which secure the power needed to supply their functionalities through wireless energy harvesting (EH) of impinging transmitted electromagnetic (EM) signals. Toward this, we initially explain the rationale behind such RIS capability and proceed with a presentation of the main RIS controller architecture that can realize this vision under an in-band EH consideration. Furthermore, we present a typical EH architecture, followed by two harvesting protocols. Subsequently, we study the performance of the two protocols under a typical communications scenario. Finally, we elaborate on the main research challenges governing the realization of large-scale networks with perpetual RISs. |
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