Integrated Access and Backhaul: A Key Enabler for 5G Millimeter-Wave Deployments
Integrated Access and Backhaul: A Key Enabler for 5G Millimeter-Wave Deployments
复制标题
DOI：
10.1109/mcom.001.2000690
复制
发表时间：
2021-04-01
影响因子：
11.2
通讯作者：
Andrews, Jeffrey
中科院分区：
文献类型：
--
作者：
Cudak, Mark;Ghosh, Amitabha;Andrews, Jeffrey
综合接入和回程(IAB)是5G NR的一项重要新功能，可通过同一频谱内的自回程实现快速且经济高效的毫米波(MmWave)部署。IAB部署可以实现出色的小区边缘覆盖，例如上行链路速率超过100Mb/S，同时显著减少所需的光纤数量。本文提供了有关IAB的入门知识，并将其与之前许多失败的多跳系统进行了对比。我们基于在芝加哥林肯公园附近合理的部署，利用39 GHz频段的光线跟踪，对覆盖和速率性能进行了大规模研究。这项研究表明，正如理论预测的那样，IAB解决方案为早期的毫米波部署提供了巨大的覆盖优势，只有少量的光纤连接(施主)基站，例如不到10公里(2)。我们表明，随着5G生态系统的成熟，随着UE和流量负载随着时间的推移而增加，可以通过将IAB(中继)节点替换为供体节点来保持每用户吞吐量，即缓慢扩展光纤网络。
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/km(2). 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.