Integrated Access and Backhaul in Millimeter-Wave Cellular: Benefits and Challenges

Yekaterina Sadovaya, Dmitri Moltchanov, Wei Mao, Oner Orhan, Shu Ping Yeh, Hosein Nikopour, Shilpa Talwar, Sergey Andreev

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)
41 Downloads (Pure)


The recently proposed NR-ready integrated access and backhaul (IAB) architecture promises to bring a cost-efficient deployment solution for both coverage extension and capacity boosting in the emerging 5G/5G+ systems. While its impact on the coverage extension was thoroughly addressed in the literature, the effect of advanced functionalities such as multihop, multi-connectivity, and multi-beam operations on the throughput remained unclear. We review and characterize the system-level impact of these capabilities on the performance of self-backhauled IAB systems operating in half-duplex mode and utilizing millimeter-wave (mmWave) technology across both access and backhaul. Our results indicate that the throughput gain of multihopping and multi-beaming is significant even without multi-connectivity operation. Another important lesson is that in all-mmWave systems with link blockage, multi-connectivity with link switching allows achieving self-load balancing. Finally, we outline future research directions.

Original languageEnglish
Pages (from-to)81-86
Number of pages6
JournalIEEE Communications Magazine
Issue number9
Publication statusPublished - 1 Sept 2022
Publication typeA1 Journal article-refereed

Publication forum classification

  • Publication forum level 2

ASJC Scopus subject areas

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


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