Large-Scale Dataset for Radio Frequency based Device-Free Crowd Estimation

This dataset serves to estimate the status, in particular the size, of a crowd given the impact on radio frequency communication links within a wireless sensor network. To quantify this relation, signal strengths  across sub-GHz communication links are collected at the premises of the Tomorrowland music festival. The communication links are formed between the network nodes of wireless sensor networks deployed in three of the festival's stage environments. 

The table below lists the eighteen dataset files. They are collected at the music festival's 2017 and 2018 editions. There are three environments, labeled: ‘Freedom Stage 2017’, ‘Freedom Stage 2018’, and ‘Main Comfort 2018’. Each environment has both 433 MHz and 868 MHz data. The measurements at each environment were collected over a period of three festival days. The dataset files are formatted as Comma-Separated Values (CSV).

| Dataset file | Reference file | Number of messages |
|-------------------- |------------------------- |-------------------- |
| free17_433_fri.csv | None | 393 852 |
| free17_868_fri.csv | None | 472 202 |
| free17_433_sat.csv | free17_transactions.csv | 996 033 |
| free17_868_sat.csv | free17_transactions.csv | 1 023 059 |
| free17_433_sun.csv | free17_transactions.csv | 1 007 066 |
| free17_868_sun.csv | free17_transactions.csv | 1 036 456 |
| free18_433_fri.csv | None | 765 024 |
| free18_868_fri.csv | None | 757 657 |
| free18_433_sat.csv | free18_transactions.csv | 711 438 |
| free18_868_sat.csv | free18_transactions.csv | 714 390 |
| free18_433_sun.csv | free18_transactions.csv | 648 329 |
| free18_868_sun.csv | free18_transactions.csv | 656 290 |
| main18_433_fri.csv | None | 791 462 |
| main18_868_fri.csv | None | 908 407 |
| main18_433_sat.csv | main18_counts.csv | 863 666 |
| main18_868_sat.csv | main18_counts.csv | 884 682 |
| main18_433_sun.csv | main18_counts.csv | 903 862 |
| main18_868_sun.csv | main18_counts.csv | 894 496 |

In addition to the datasets and reference files, a software example is provided to illustrate the data use and visualise the initial findings and relation between crowd size and network signal strength impact.

In order to use the software, please retain the following file structure: 

.
├── data
├── data_reference
├── graphs
└── software

The peer-reviewed data descriptor for this dataset has now been published in MDPI Data - an open access journal aiming at enhancing data transparency and reusability, and can be accessed here: https://doi.org/10.3390/data5020052.
Please cite this when using the dataset.