Multi-band Wireless Networks: Architectures, Challenges, and Comparative Analysis

Mohammad Amin Saeidi, Hina Tabassum, Mohamed-Slim Alouini

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


This paper presents the vision of multi-band communication networks (MBN) in 6G, where optical and TeraHertz (THz) transmissions will coexist with the conventional radio frequency (RF) spectrum. This paper will first pin-point the fundamental challenges in MBN architectures at the PHYsical (PHY) and Medium Access (MAC) layer, such as unique channel propagation and estimation issues, user offloading and resource allocation, multi-band transceiver design and antenna systems, mobility and handoff management, backhauling, etc. We then perform a quantitative performance assessment of the two fundamental MBN architectures, i.e., stand-alone MBN and integrated MBN considering critical factors like achievable rate, and capital/operational deployment cost. Our results show that stand-alone deployment is prone to higher capital and operational expenses for a predefined data rate requirement. Stand-alone deployment, however, offers flexibility and enables controlling the number of access points in different transmission bands. In addition, we propose a molecular absorptionaware user offloading metric for MBNs and demonstrate its performance gains over conventional user offloading schemes. Finally, open research directions are presented.
Original languageEnglish (US)
Pages (from-to)1-7
Number of pages7
JournalIEEE Communications Magazine
StatePublished - Jul 11 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-09-27
Acknowledgements: The work is supported by the Discovery Grant from the Natural Sciences and Engineering Research Council of Canada.

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Electrical and Electronic Engineering


Dive into the research topics of 'Multi-band Wireless Networks: Architectures, Challenges, and Comparative Analysis'. Together they form a unique fingerprint.

Cite this