LTE-Licensed Assisted Access (LAA) networks are beginning to be deployed widely in major metropolitan areas in the U.S. in the unlicensed 5 GHz bands, which have existing dense deployments of Wi-Fi as well. Various aspects of the coexistence scenarios such deployments give rise to have been considered in a vast body of academic and industry research. However, there is very little data and research on how these coexisting networks will behave in practice. The question of “fair coexistence” between Wi-Fi and LAA has moved from a theoretical question to reality. The recent roll-out of LAA deployments provides an opportunity to collect data on the operation of these networks as well as studying coexistence issues on the ground. In this article we describe the first results of a measurement campaign conducted over many months, using custom apps as well as off-the-shelf tools, in several areas of Chicago where the major carriers have been expanding LAA deployments. The measurements reveal that coexistence between LAA and Wi-Fi in dense urban environments where both systems aggregate multiple channels continues to be a challenging problem that requires further research.

中文翻译：

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基于测量的LAA和Wi-Fi部署在芝加哥的共存研究

LTE许可的辅助访问（LAA）网络开始在美国5个未许可的5 GHz频带内的大城市中广泛部署，而这些区域也已有Wi-Fi的密集部署。在广泛的学术和行业研究中已经考虑了这种部署所带来的共存方案的各个方面。但是，关于这些共存网络在实践中如何运行的数据和研究很少。Wi-Fi和LAA之间的“公平共存”问题已经从理论问题变为现实。最近推出的LAA部署提供了一个机会，可以收集有关这些网络运行的数据以及研究当地的共存问题。在本文中，我们描述了为期数月的评估活动的初步结果，在芝加哥的一些地区，主要运营商一直在扩展LAA部署，使用定制应用程序和现成的工具。测量结果表明，LAA和Wi-Fi在稠密的城市环境中（两个系统都汇聚多个渠道）的共存仍然是一个充满挑战的问题，需要进一步研究。