CRAWDAD srfg/lte-4g-highway-drive-tests-salzburg

4G LTE long-term mobile communications drive test data set. DOI: https://doi.org/10.15783/6gc4-y070A data set of active 4G LTE measurements via repeated drive tests that covers two years on a typical highway section of 25km length in Austria and contains 267198 data points in total. Each data point includes signal quality metrics, GPS position, GPS time, and instantaneous data rate.institution :Salzbury Research (SRFG)version :2022-01-18external url :https://github.com/mherlich/wireless-data-setTracesetdrive-tests-tracesetfiles: SRFG-v1.csvdescription: 4G LTE long-term mobile communications drive test tracesettech description: A traceset of active 4G LTE measurements via repeated drive tests that covers two years on a typical highway section of 25km length in Austria and contains 267198 data points in total. Each data point includes signal quality metrics, GPS position, GPS time, and instantaneous data rate.collection method: Custom-built Raspberry Pi~2 based measurement equipment is used to conduct a controlled drive test measurement campaign. Each Raspberry Pi is equipped with the same Huawei E3372 LTE network interface that provides the Huawei HiLink API for signal parameter monitoring. The measurement equipment constantly exchanges data at full load. Five TCP flows with 100MB HTTP traffic each are simultaneously transmitted and continuously restarted once a download is complete. Then, the data rate is monitored for each flow and averaged over 1 second. The overall data rate is the sum of the individual flow data rates. In addition, a GPS module simultaneously records the geographical position and the time. The Huawei HiLink API is used to monitor the signal parameters that are provided by the LTE network interface in a 1 second interval.methodology limitations: The drive test measurements are derived from organized measurement drives without much privacy concerns and private drives where the vehicle was previously equipped with the measurement equipment (identififying data is removed in the trace set). Often the drive tests are conducted during rush hour when high cell loads are expected. But overall, conceptually there is no strict measurement schedule and there are drive tests at all times of day and during most of the year. Due to the absence of strict measurement scheduling the data points are not uniformly distributed over the year; especially during the summer months August and September there are fewer data points. Nonetheless, for each month th