This study replicates our ACM IMC 2023 work, comparing U.S. cellular coverage and performance from 2022 to 2024 along the same route. While coverage and performance have improved, two of the three major operators still deliver under 50% 5G coverage along the route. We perform an additional analysis comparing cellular networks with Starlink’s LEO satellite service.
(Dataset Coming Soon!)

This study conducts the first longitudinal ‘metamorphosis’ analysis of 5G, using 2.65M+ Ookla Speedtest measurements across nine U.S. and European cities from 2020–2023. We reveal the evolution of 5G coverage, throughput, and latency at quarterly granularity, compare cross-city performance diversity, and uncover factors influencing user experience, including device adoption and network load. 

This study presents the first in-depth empirical analysis of beam management in commercial 5G mmWave networks across two major U.S. operators and six cities. We evaluate key parameters, mobility scenarios, and interactions with rate adaptation and carrier aggregation, revealing the overhead and effectiveness of real-world beam tracking. (Dataset)

This study explores the potential of multi-carrier access in cellular networks through an 8,000+ km cross-country measurement campaign across all three major U.S. operators. We find substantial performance diversity across operators at a given location and time. Trace-driven analysis show that link selection and aggregation techniques offer significant gains over single-operator performance. (Dataset)

This study presents the first systematic analysis of resource allocation policies in commercial 5G mmWave networks, based on measurements across four U.S. cities and two major operators. We find that operators employ simple threshold-based policies and often over-allocate resources to new flows with low traffic demands or reserve some capacity for future usage. These policies vary not only among operators but also for a single operator in different cities.

This study assesses 5G deployment maturity through a one year-long uplink measurement campaigns: a crowd-sourced study across eight cities in Europe and North America, and a controlled mmWave study in Boston. Our datasets show that 5G deployment in major cities appears to have matured, with no major performance improvements observed over a one-year period, but 5G does not provide consistent, superior measurable performance over LTE, especially in terms of latency, and further there exists clear uneven 5G performance across the 8 cities. (Dataset)

This work introduces a UE-centric localization system that leverages 5G mmWave infrastructure to provide accurate positioning in dense urban areas without relying on 3GPP location support. By using only UE-side control-plane information (SSB indices mapped to beam directions) and particle filtering, our system via real-world experiments show sub-3 m median accuracy and under 10 m at the 95th percentile. (Dataset coming soon!)

This work explores the integration of Integrated Sensing and Communication (ISAC) with the 5G Network Data Analytics Function (NWDAF) to address performance variability and high energy consumption in 5G. We introduce two new functions—Sensing Service Function (SSF) and Energy Efficiency Control Function (EECF)—that optimize base station transmit power to balance latency and energy use. Our results demonstrate a promising path toward greener, more reliable 5G and beyond networks.

This work investigates whether legacy 5G networks can meet the stringent demands of applications like XR and factory automation by analyzing the limitations of current fixed TDD frame configurations. We propose a machine learning–enabled framework that dynamically reconfigures PHY frames based on real-time channel predictions. Validation on an 3GPP compliant 5G testbed shows that our approach consistently outperforms fixed configurations, reducing overall untransmitted bytes and better meeting heterogeneous traffic demands.

This is the first study that presents a cross-continental 5G measurement campaign (LA to Boston, 5700+ km) evaluating coverage, network performance, and user experience of latency-sensitive applications under real driving conditions. Our findings revealed fragmented 5G coverage and poor application performance even after 4 years of 5G rollout. (Dataset)

This study evaluates the feasibility of using 5G mmWave with edge cloud to support latency-critical AR via edge-assisted object detection. We find that current 5G mmWave uplink performance is insufficient to meet AR requirements, with only marginal gains over LTE, while app-level optimizations and edge hardware upgrades offer performance improvements but still fall short of enabling robust AR.

This study revisits the feasibility of multi-user AR over LTE and 5G by analyzing the Just a Line app, which achieves end-to-end latencies of a few hundred milliseconds—sufficient for real-time interactions. We show that performance differences across popular AR apps stem from their architectural choices for SLAM, with asynchronous vs. synchronous updates leading to drastically different user experiences.(Dataset)

This study examines whether 5G mmWave can support multi-user AR by conducting an in-depth measurement of a popular AR app over both LTE and 5G mmWave. We find that while 5G mmWave reduces uplink visual data transmission latency, the overall end-to-end latency remains too high for practical interaction, as non-network components dominate. Moreover, the app consumes 66% more network energy and 28% more total energy on 5G mmWave compared to LTE, offering no real benefit for multi-user AR. (Dataset) 

This study presents a systematic analysis of uplink performance in commercial 5G mmWave networks across three U.S. cities and two operators. We show that while 5G mmWave offers substantially higher bandwidth and lower latency than LTE, its performance is geographically inconsistent, erratic, and often suboptimal for latency-critical applications. Our control- and PHY-level analysis reveals fundamental challenges, highlighting the need for design and deployment optimizations to realize 5G mmWave’s full potential. (Dataset)