Integrated Access and Backhaul in Millimeter-Wave Cellular: Benefits and Challenges | IEEE Journals & Magazine | IEEE Xplore

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


Abstract:

The recently proposed NR-ready integrated access and backhaul (IAB) architecture promises to bring a cost-efficient deployment solution for both coverage extension and ca...Show More

Abstract:

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.
Published in: IEEE Communications Magazine ( Volume: 60, Issue: 9, September 2022)
Page(s): 81 - 86
Date of Publication: 20 May 2022

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