Integrated Access and Backhaul: A Key Enabler for 5G Millimeter-Wave Deployments. Cudak, M., Ghosh, A., Ghosh, A., & Andrews, J. IEEE Communications Magazine, 59(4):88–94, 2021. doi abstract bibtex Integrated access and backhaul (IAB) is an important new feature in 5G NR that enables rapid and cost-effective millimeter-wave (mmWave) deployments through self-backhauling in the same spectrum. IAB deployments can achieve excellent cell edge coverage, for example, uplink rates above 100 Mb/s, while significantly reducing the amount of required fiber. This article provides a primer on IAB, contrasting it with the many failed multihop systems that preceded it. We conduct a large-scale study of coverage and rate performance based on a plausible deployment in Chicago's Lincoln Park neighborhood, utilizing ray tracing in the 39 GHz band. The study demonstrates that, as theory predicts, an IAB solution provides a massive coverage advantage for early mmWave rollouts with only a small number of fiber-connected (donor) base stations, for example, less than 10/km2. We show that as the UE and traffic loads increase over time as the 5G eco-system matures, the per user throughput can be maintained by replacing IAB (relay) nodes with donor nodes, that is, slowly extending the fiber network.
@article{cudak_integrated_2021,
title = {Integrated {Access} and {Backhaul}: {A} {Key} {Enabler} for {5G} {Millimeter}-{Wave} {Deployments}},
volume = {59},
issn = {15581896},
doi = {10.1109/MCOM.001.2000690},
abstract = {Integrated access and backhaul (IAB) is an important new feature in 5G NR that enables rapid and cost-effective millimeter-wave (mmWave) deployments through self-backhauling in the same spectrum. IAB deployments can achieve excellent cell edge coverage, for example, uplink rates above 100 Mb/s, while significantly reducing the amount of required fiber. This article provides a primer on IAB, contrasting it with the many failed multihop systems that preceded it. We conduct a large-scale study of coverage and rate performance based on a plausible deployment in Chicago's Lincoln Park neighborhood, utilizing ray tracing in the 39 GHz band. The study demonstrates that, as theory predicts, an IAB solution provides a massive coverage advantage for early mmWave rollouts with only a small number of fiber-connected (donor) base stations, for example, less than 10/km2. We show that as the UE and traffic loads increase over time as the 5G eco-system matures, the per user throughput can be maintained by replacing IAB (relay) nodes with donor nodes, that is, slowly extending the fiber network.},
number = {4},
journal = {IEEE Communications Magazine},
author = {Cudak, Mark and Ghosh, Amitabha and Ghosh, Arunabha and Andrews, Jeffrey},
year = {2021},
pages = {88--94},
}
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