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Cooperative Hybrid Networks with Active Relays and RISs for B5G: Applications, Challenges, and Research Directions
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2022 (English)In: IEEE Wireless Communications, ISSN 15361284, p. 1-7Article in journal (Refereed) Published
Abstract [en]

Among the recent advances and innovations in wireless technologies, reconfigurable intelligent surfaces (RISs) have received much attention and are envisioned to be one of the enabling technologies for beyond 5G (B5G) networks. On the other hand, active (or classical) cooperative relays have played a key role in providing reliable and power-efficient communications in previous wireless generations. In this article, we focus on hybrid network architectures that amalgamate both active relays and RISs. The operation concept and protocols of each technology are first discussed. Subsequently, we present multiple use cases of cooperative hybrid networks where both active relays and RISs can coexist harmoniously for enhanced rate performance. Furthermore, a case study is provided which demonstrates the achievable rate performance of a communication network assisted by either an active relay, an RIS, or both, and with different relaying protocols. Finally, we provide the reader with the challenges and key research directions in this area.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2022. p. 1-7
Keywords [en]
Bandwidth, Protocols, Relays, Signal to noise ratio, Spatial diversity, Throughput, Transmitting antennas
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-337539DOI: 10.1109/MWC.012.2200292Scopus ID: 2-s2.0-85141493381OAI: oai:DiVA.org:kth-337539DiVA, id: diva2:1802554
Note

QC 20231009

Available from: 2023-10-05 Created: 2023-10-05 Last updated: 2023-10-09Bibliographically approved

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Ottersten, Björn

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