Cellular operators have begun deploying 5G New Radio (NR) in all available bands: low (< 1 GHz), mid (1 - 6 GHz), and high (> 24 GHz) to exploit the different capabilities of each. At the same time, traditional 4G Long Term Evolution (LTE) deployments are being enhanced with the addition of bands in the unlicensed 5 GHz (using License Assisted Access, or LAA) and the 3.5 GHz Citizens Broadband Radio Service (CBRS) resulting in throughput performance comparable to 5G in mid-band. We present a detailed study comparing 4G and 5G deployments, in all bands in Chicago, and focused mmWave measurements and analysis in Miami. Our methodology, based on commercial and custom apps, is scalable for crowdsourcing measurements on a large scale and provides detailed data (throughput, latency, signal strength, etc.) on actual deployments. Our main conclusions based on the measurements are (i) optimized 4G networks in mid-band are comparable in both throughput and latency to current deployments of 5G (both standalone (SA) and non-standalone (NSA)) and (ii) mmWave 5G, even in NSA mode, can deliver multi-Gbps throughput reliably if the installation is dense enough, but performance is still brittle due to the propagation limitations imposed by distance and body loss. Thus, while 5G demonstrates significant early promise, further work needs to be done to ensure that the stated goals of 5G are met.

翻译：同时,传统的4G长期演进(LTE)部署正在加强,在5GHz(使用许可证协助出入,或LAA)和3.5GHC公民宽带广播服务(CBRS)中,增加了无许可证的5G新电台(使用许可证协助进入,或LAA)和3.5GHC公民宽带广播服务(CBRS)中段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段,中间段段段段段段段段段段段段段段(中段段段段段段段段段段段)的吞吐量性能与5G和5G部署段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段(基于商业和定制应用程序),我们基于大规模众包运量测量的方法可以扩大规模,并提供实际部署的详细数据(投入、延度、信号强度、强度等段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段,确保与当前部署的平至至后,且(可达达达达达达至段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段段