TY - JOUR
T1 - Reconfigurable intelligent surfaces vs. relaying
T2 - Differences, similarities, and performance comparison
AU - Di Renzo, Marco
AU - Ntontin, Konstantinos
AU - Song, Jian
AU - Danufane, Fadil H.
AU - Qian, Xuewen
AU - Lazarakis, Fotis
AU - De Rosny, Julien
AU - Phan-Huy, Dinh Thuy
AU - Simeone, Osvaldo
AU - Zhang, Rui
AU - Debbah, Meroaune
AU - Lerosey, Geoffroy
AU - Fink, Mathias
AU - Tretyakov, Sergei
AU - Shamai, Shlomo
N1 - Publisher Copyright: © 2020 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.
PY - 2020
Y1 - 2020
N2 - Reconfigurable intelligent surfaces (RISs) have the potential of realizing the emerging concept of smart radio environments by leveraging the unique properties of metamaterials and large arrays of inexpensive antennas. In this article, we discuss the potential applications of RISs in wireless networks that operate at high-frequency bands, e.g., millimeter wave (30-100 GHz) and sub-millimeter wave (greater than 100 GHz) frequencies. When used in wireless networks, RISs may operate in a manner similar to relays. The present paper, therefore, elaborates on the key differences and similarities between RISs that are configured to operate as anomalous reflectors and relays. In particular, we illustrate numerical results that highlight the spectral efficiency gains of RISs when their size is sufficiently large as compared with the wavelength of the radio waves. In addition, we discuss key open issues that need to be addressed for unlocking the potential benefits of RISs for application to wireless communications and networks.
AB - Reconfigurable intelligent surfaces (RISs) have the potential of realizing the emerging concept of smart radio environments by leveraging the unique properties of metamaterials and large arrays of inexpensive antennas. In this article, we discuss the potential applications of RISs in wireless networks that operate at high-frequency bands, e.g., millimeter wave (30-100 GHz) and sub-millimeter wave (greater than 100 GHz) frequencies. When used in wireless networks, RISs may operate in a manner similar to relays. The present paper, therefore, elaborates on the key differences and similarities between RISs that are configured to operate as anomalous reflectors and relays. In particular, we illustrate numerical results that highlight the spectral efficiency gains of RISs when their size is sufficiently large as compared with the wavelength of the radio waves. In addition, we discuss key open issues that need to be addressed for unlocking the potential benefits of RISs for application to wireless communications and networks.
KW - 5G
KW - 6G
KW - Reconfigurable intelligent surfaces
KW - Relays
KW - Smart radio environments
UR - http://www.scopus.com/inward/record.url?scp=85122046228&partnerID=8YFLogxK
U2 - https://doi.org/10.1109/OJCOMS.2020.3002955
DO - https://doi.org/10.1109/OJCOMS.2020.3002955
M3 - مقالة
SN - 2644-125X
VL - 1
SP - 798
EP - 807
JO - IEEE Open Journal of the Communications Society
JF - IEEE Open Journal of the Communications Society
M1 - 3002955
ER -