Collection of a Continuous Long-Term Dataset for the Evaluation of Wi-Fi-Fingerprinting-Based Indoor Positioning Systems
Abstract
:1. Introduction
- Analysis of long-term variations and assessment of long-term radio map degradation. This dataset was used for this purpose in [14].
- Devising new solutions to overcome radio map degradation. Significant efforts have been made in the past to develop methods to keep the radio maps up to date using interpolation, e.g., considering techniques such as Log-distance Path Loss (LDPL) [15,16,17], Radial Basis Functions (RBF) [18], Inverse Distance Weighted (IDW) [19,20], Voronoi tesselation [21], and Kriging [22,23].
- Testing and evaluation of an Indoor Positioning System (IPS) or for benchmarking and performance comparison between different IPSs.
2. Related Work
3. Approach for Dataset Collection
- Survey points: Ideally, the collection should be done in as many points as possible to have a higher spatial resolution in the collected data. However, that is not possible, so the distribution of MDs should maximize the coverage area of the building.
- Time span: The data collection should be long enough to observe infrastructure changes (addition or removal of APs that compose the building’s Wi-Fi infrastructure) that may occur after months or even years [14]. Having a long-term dataset allows one to analyze trends in the short term and long term, e.g., whether there are patterns that occur weekly or monthly, or whether there is a month when radio signals change a lot.
- Wi-Fi scans: Nowadays, the Wi-Fi APs deployed in indoor environments support IEEE 802.11 b/g/n (2.4 GHz frequency band) and IEEE 802.11 a/ac/ax (5 GHz frequency band); hence, the Wi-Fi scans should include APs emitting in the 2.4 and 5 GHz frequency bands. Consequently, this dataset is of high quality, as it better represents the radio environment.
- Indoor Positioning: The collected data should include calibration and testing datasets with ground truth, which can be used to validate and test IPSs.
- Data collection: A continuous long-term dataset should be collected autonomously by deploying MDs in known locations, which allows data to be collected without human intervention. Manual site surveys should be performed to collect data in known locations, to be used in positioning applications considering a realistic scenario, e.g., a pedestrian holding a smartphone or a Wi-Fi-enabled indoor vehicle.In the following sections, we describe how we addressed these challenges in the system that was developed to collect the dataset.
4. Experimental Setup
4.1. Hardware
4.1.1. Monitoring Devices
- Service Set Identifier (SSID)—the name of the network that is broadcast by the AP;
- Basic Service Set Identifier (BSSID)—the basic service set identifier of the AP;
- Received Signal Strength Indicator (RSSI)—the signal strength value in dBm;
- Channel—the frequency channel of the AP, from the 2.4 GHz or 5 GHz band;
- Link quality—aggregate value that represents the overall quality of the link.
4.1.2. Mobile Unit
4.2. Software for the Automatic Long-Term Data Collection
4.2.1. Monitoring Device Application
- Wi-Fi sample polling—the time interval between consecutive scans to obtain Wi-Fi samples, defined in seconds;
- location coordinates—latitude and longitude coordinates of the location where the MD is deployed;
- location description—textual description of the location where the MD is deployed;
- e-mail—the email address to send alerts;
- number of unsent samples—an alert email will be sent when the number of unsent Wi-Fi samples is higher than this value.
4.2.2. Server Application
- e-mail—the destination email address to whom alerts will be sent;
- time without receiving data from device (hours)—when the MD stopped sending new Wi-Fi samples over this number of hours, an email alert will be sent;
- polling time for device monitoring (seconds)—time interval in which the Device Monitoring Module checks the latest device’s connections.
4.2.3. Data Collection Module
4.2.4. Device Monitoring Module
4.3. Software for the Manual Site Surveys
5. Database Description
5.1. Continuous Long-Term Dataset
5.2. Manual Site Surveys
5.3. Dataset Folder Structure
5.4. File Contents
- coords_info.csv: list of the coordinates of RPs where Wi-Fi samples were collected on the site surveys;
- mds_info.csv: list of monitoring devices, their names, and position coordinates inside the building, where the z coordinate corresponds to the height of the device relative to the floor.
- timestamps.csv: the list of timestamps as defined in T;
- coordinates.csv: the list of coordinates as defined in P;
- rssis.csv: the list of RSS values from detected APs, as defined in ;
- channels.csv: the list of channels from detected APs, as defined in C;
6. Data Analysis
- coordinates where Wi-Fi samples were collected (RPs locations in floor plan);
- Wi-Fi samples density, number of collected Wi-Fi samples at each RP, shown in the floor plan with a color scale;
- times during which MDs were operational;
- detected APs over time (global or local);
- mean Received Signal Strength Indicator (RSSI) of AP in each location, shown in floor plan;
- AP RSSI over time for a specific location;
- AP RSSI over time for all MDs;
- AP channel over time (global or local);
6.1. Plot Reference Points
6.2. Plot Monitoring Device Operational Times
6.3. Plot AP Info over Time
6.4. APs Detected over Time
7. Applications of the Dataset
8. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Abbreviations
AP | Access Point |
BLE | Bluetooth Low Energy |
BSSID | Basic Service Set Identifier |
GNSS | Global Navigation Satellite System |
IDW | Inverse Distance Weighted |
IPIN | International Conference on Indoor Positioning and Indoor Navigation |
IPS | Indoor Positioning System |
LDPL | Log-distance Path Loss |
MAC | Media Access Control |
MD | Monitoring Device |
RBF | Radial Basis Functions |
RP | Reference Point |
RPi | Raspberry Pi |
RSS | Received Signal Strength |
RSSI | Received Signal Strength Indicator |
SFTP | SSH File Transfer Protocol |
SIR | Signal to Interference Ratio |
SSH | Secure Shell |
SSID | Service Set Identifier |
UWB | Ultra Wide-band |
WLAN | Wireless Local Area Network |
WSN | Wireless Sensor Network |
References
- Barsocchi, P.; Chessa, S.; Furfari, F.; Potortì, F. Evaluating Ambient Assisted Living Solutions: The Localization Competition. IEEE Pervasive Comput. 2013, 12, 72–79. [Google Scholar] [CrossRef]
- Torres-Sospedra, J.; Belmonte-Fernández, Ó.; Mendoza-Silva, G.M.; Montoliu, R.; Puertas-Cabedo, A.; Rodríguez-Pupo, L.E.; Trilles, S.; Calia, A.; Benedito-Bordonau, M.; Huerta, J. 3-Lessons Learned in Generating Ground Truth for Indoor Positioning Systems Based on Wi-Fi Fingerprinting. In Geographical and Fingerprinting Data to Create Systems for Indoor Positioning and Indoor/Outdoor Navigation; Conesa, J., Pérez-Navarro, A., Torres-Sospedra, J., Montoliu, R., Eds.; Intelligent Data-Centric Systems, Academic Press: Cambridge, MA, USA, 2019; pp. 45–67. [Google Scholar] [CrossRef]
- Tian, Y.; Wang, J.; Zhao, Z. Wi-Fi Fingerprint Update for Indoor Localization via Domain Adaptation. In Proceedings of the 2021 IEEE 27th International Conference on Parallel and Distributed Systems (ICPADS), Beijing, China, 14–16 December 2021; pp. 835–842. [Google Scholar] [CrossRef]
- Chen, P.; Shang, J.; Gu, F. Learning RSSI Feature via Ranking Model for Wi-Fi Fingerprinting Localization. IEEE Trans. Veh. Technol. 2020, 69, 1695–1705. [Google Scholar] [CrossRef]
- Sazdar, A.M.; Alikhani, N.; Ghorashi, S.A.; Khonsari, A. Privacy preserving in indoor fingerprint localization and radio map expansion. Peer-to-Peer Netw. Appl. 2021, 14, 121–134. [Google Scholar] [CrossRef]
- Torkamandi, P.; Kärkkäinen, L.; Ott, J. An Online Method for Estimating the Wireless Device Count via Privacy-Preserving Wi-Fi Fingerprinting. In Proceedings of the Passive and Active Measurement, Virtual, 29 March–1 April 2021; Hohlfeld, O., Lutu, A., Levin, D., Eds.; Springer International Publishing: Cham, Switzerland, 2021; pp. 406–423. [Google Scholar]
- Moreira, A.; Nicolau, M.J.; Silva, I.; Torres-Sospedra, J.; Pendão, C.; Meneses, F. Wi-Fi Fingerprinting dataset with multiple simultaneous interfaces. ZENODO, 10 September 2019. [Google Scholar] [CrossRef]
- Lohan, E.S. Additional TAU datasets for Wi-Fi fingerprinting-based positioning. ZENODO, 11 May 2020. [Google Scholar] [CrossRef]
- Mendoza-Silva, G.M.; Richter, P.; Torres-Sospedra, J.; Lohan, E.S.; Huerta, J. Long-term WiFi fingerprinting dataset for research on robust indoor positioning. Data 2018, 3, 3. [Google Scholar] [CrossRef] [Green Version]
- Mendoza-Silva, G.M.; Richter, P.; Torres-Sospedra, J.; Lohan, E.S.; Huerta, J. Long-Term Wi-Fi fingerprinting dataset and supporting material-Version 2.0. ZENODO, 17 August 2018. [Google Scholar] [CrossRef]
- Mendoza-Silva, G.M.; Richter, P.; Torres-Sospedra, J.; Lohan, E.S.; Huerta, J. Long-Term Wi-Fi fingerprinting dataset and supporting material-Version 2.2. ZENODO, 11 April 2020. [Google Scholar] [CrossRef]
- Torres-Sospedra, J.; Moreira, A. Analysis of sources of large positioning errors in deterministic fingerprinting. Sensors 2017, 17, 2736. [Google Scholar] [CrossRef] [PubMed] [Green Version]
- Jiang, Q.; Ma, Y.; Liu, K.; Dou, Z. A Probabilistic Radio Map Construction Scheme for Crowdsourcing-Based Fingerprinting Localization. IEEE Sens. J. 2016, 16, 3764–3774. [Google Scholar] [CrossRef]
- Silva, I.; Pendão, C.; Torres-Sospedra, J.; Moreira, A. Quantifying the Degradation of Radio Maps in Wi-Fi Fingerprinting. In Proceedings of the 2021 International Conference on Indoor Positioning and Indoor Navigation (IPIN), Lloret de Mar, Spain, 29 November–2 December 2021; pp. 1–8. [Google Scholar] [CrossRef]
- Bahl, P.; Padmanabhan, V. RADAR: An in-building RF-based user location and tracking system. In Proceedings of the IEEE INFOCOM 2000. Conference on Computer Communications. Nineteenth Annual Joint Conference of the IEEE Computer and Communications Societies (Cat. No.00CH37064), Tel Aviv, Israel, 26–30 March 2000; Volume 2, pp. 775–784. [Google Scholar] [CrossRef]
- Ji, Y.; Biaz, S.; Pandey, S.; Agrawal, P. ARIADNE. In Proceedings of the 4th International Conference on Mobile Systems, Applications and Services —MobiSys 2006, Uppsala, Sweden, 19–22 June 2006; ACM Press: New York, NY, USA, 2006; p. 151. [Google Scholar] [CrossRef]
- Bose, A.; Foh, C.H. A practical path loss model for indoor WiFi positioning enhancement. In Proceedings of the 2007 6th International Conference on Information, Communications & Signal Processing, Singapore, 10–13 December 2007; pp. 1–5. [Google Scholar] [CrossRef]
- Laoudias, C.; Kemppi, P.; Panayiotou, C.G. Localization Using Radial Basis Function Networks and Signal Strength Fingerprints in WLAN. In Proceedings of the GLOBECOM 2009—2009 IEEE Global Telecommunications Conference, Honolulu, HI, USA, 30 November 2009–4 December 2009; pp. 1–6. [Google Scholar] [CrossRef]
- Tao, Y.; Zhao, L.; Zhang, Q.; Chen, Z. Wi-Fi Fingerprint Database Refinement Method and Performance Analysis. In Proceedings of the 2018 Ubiquitous Positioning, Indoor Navigation and Location-Based Services (UPINLBS), Wuhan, China, 22–23 March 2018; pp. 1–6. [Google Scholar] [CrossRef]
- Khoo, H.W.; Ng, Y.H.; Tan, C.K. Enhanced Radio Map Interpolation Methods Based on Dimensionality Reduction and Clustering. Electronics 2022, 11, 2581. [Google Scholar] [CrossRef]
- Lee, M.; Han, D. Voronoi Tessellation Based Interpolation Method for Wi-Fi Radio Map Construction. IEEE Commun. Lett. 2012, 16, 404–407. [Google Scholar] [CrossRef]
- Zhao, H.; Huang, B.; Jia, B. Applying kriging interpolation for WiFi fingerprinting based indoor positioning systems. In Proceedings of the 2016 IEEE Wireless Communications and Networking Conference, Doha, Qatar, 3–6 April 2016; pp. 1–6. [Google Scholar] [CrossRef]
- Mao, D.; Shao, W.; Qian, Z.; Xue, H.; Lu, X.; Wu, H. Constructing accurate Radio Environment Maps with Kriging Interpolation in Cognitive Radio Networks. In Proceedings of the 2018 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC), Xuzhou, China, 21–24 July 2018; pp. 1–3. [Google Scholar] [CrossRef]
- Zhang, D.; Qiu, G.; Gao, Y.; Fang, X.; Cheng, R.; Chang, A.; Chan, C.Y. Crowdsourcing based radio map anomalous event detection system for calibration-on-demand. In Proceedings of the 2014 International Conference on Indoor Positioning and Indoor Navigation (IPIN), Busan, Korea, 27–30 October 2014; pp. 220–229. [Google Scholar] [CrossRef]
- Poornima, I.G.A.; Paramasivan, B. Anomaly detection in wireless sensor network using machine learning algorithm. Comput. Commun. 2020, 151, 331–337. [Google Scholar] [CrossRef]
- Bin Ahmadon, M.A.; Yamaguchi, S. Verification Method for Accumulative Event Relation of Message Passing Behavior with Process Tree for IoT Systems. Information 2020, 11, 232. [Google Scholar] [CrossRef] [Green Version]
- Ha, D.W.; Jung, K.Y.; Baek, J.; Lee, G.S.; Lee, Y.; Shin, D.S.; Na, E.H. Trend Analysis Using Long-Term Monitoring Data of Water Quality at Churyeongcheon and Yocheon Basins. Sustainability 2022, 14, 9770. [Google Scholar] [CrossRef]
- Ridolfi, M.; Vandermeeren, S.; Defraye, J.; Steendam, H.; Gerlo, J.; De Clercq, D.; Hoebeke, J.; De Poorter, E. Experimental Evaluation of UWB Indoor Positioning for Sport Postures. Sensors 2018, 18, 168. [Google Scholar] [CrossRef] [PubMed] [Green Version]
- Spachos, P.; Plataniotis, K.N. BLE Beacons for Indoor Positioning at an Interactive IoT-Based Smart Museum. IEEE Syst. J. 2020, 14, 3483–3493. [Google Scholar] [CrossRef] [Green Version]
- Yu, D.; Li, C. An Accurate WiFi Indoor Positioning Algorithm for Complex Pedestrian Environments. IEEE Sens. J. 2021, 21, 24440–24452. [Google Scholar] [CrossRef]
- Zhang, L.; Chen, Z.; Cui, W.; Li, B.; Chen, C.; Cao, Z.; Gao, K. WiFi-Based Indoor Robot Positioning Using Deep Fuzzy Forests. IEEE Internet Things J. 2020, 7, 10773–10781. [Google Scholar] [CrossRef]
- Silva, I.; Pendao, C.; Torres-Sospedra, J.; Moreira, A. TrackInFactory: A Tight Coupling Particle Filter for Industrial Vehicle Tracking in Indoor Environments. IEEE Trans. Syst. Man, Cybern. Syst. 2021, 52, 4151–4162. [Google Scholar] [CrossRef]
- BASRI, C.; El Khadimi, A. Survey on indoor localization system and recent advances of WIFI fingerprinting technique. In Proceedings of the 2016 5th International Conference on Multimedia Computing and Systems (ICMCS), Marrakech, Morocco, 29 September 2016–1 October 2016; pp. 253–259. [Google Scholar] [CrossRef]
- Abbas, M.; Elhamshary, M.; Rizk, H.; Torki, M.; Youssef, M. WiDeep: WiFi-based Accurate and Robust Indoor Localization System using Deep Learning. In Proceedings of the 2019 IEEE International Conference on Pervasive Computing and Communications (PerCom), Kyoto, Japan, 11–15 March 2019; pp. 1–10. [Google Scholar] [CrossRef]
- Xiong, J.; Jamieson, K. ArrayTrack: A Fine-Grained Indoor Location System. In Proceedings of the 10th USENIX Conference on Networked Systems Design and Implementation–nsdi’13, Lombard, IL, USA, 2–5 April 2013; USENIX Association: Berkeley, CA, USA, 2013; pp. 71–84. [Google Scholar]
- Banin, L.; Schtzberg, U.; Amizur, Y. Next generation indoor positioning system based on WiFi time of flight. In Proceedings of the 26th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2013), Nashville, TN, USA, 16–20 September 2013; pp. 975–982. [Google Scholar]
- Makki, A.; Siddig, A.; Saad, M.; Cavallaro, J.R.; Bleakley, C.J. Indoor Localization Using 802.11 Time Differences of Arrival. IEEE Trans. Instrum. Meas. 2016, 65, 614–623. [Google Scholar] [CrossRef]
- Zafari, F.; Gkelias, A.; Leung, K.K. A Survey of Indoor Localization Systems and Technologies. IEEE Commun. Surv. Tutor. 2019, 21, 2568–2599. [Google Scholar] [CrossRef] [Green Version]
- Potorti, F.; Torres-Sospedra, J.; Quezada-Gaibor, D.; Jimenez, A.R.; Seco, F.; Perez-Navarro, A.; Ortiz, M.; Zhu, N.; Renaudin, V.; Ichikari, R.; et al. Off-Line Evaluation of Indoor Positioning Systems in Different Scenarios: The Experiences From IPIN 2020 Competition. IEEE Sens. J. 2022, 22, 5011–5054. [Google Scholar] [CrossRef]
- Potorti, F.; Park, S.; Crivello, A.; Palumbo, F.; Girolami, M.; Barsocchi, P.; Lee, S.; Torres-Sospedra, J.; Ruiz, A.R.J.; Perez-Navarro, A.; et al. The IPIN 2019 Indoor Localisation Competition—Description and Results. IEEE Access 2020, 8, 206674–206718. [Google Scholar] [CrossRef]
- Moreira, A.; Silva, I.; Meneses, F.; Nicolau, M.J.; Pendao, C.; Torres-Sospedra, J. Multiple simultaneous Wi-Fi measurements in fingerprinting indoor positioning. In Proceedings of the 2017 International Conference on Indoor Positioning and Indoor Navigation (IPIN), Sapporo, Japan, 18-21 September 2017. [Google Scholar] [CrossRef] [Green Version]
- ISO—ISO 8601:2004—Data Elements and Interchange Formats—Information Interchange—Representation of Dates and Times. Available online: https://www.iso.org/standard/40874.html. (accessed on 25 July 2012).
- Pendão, C.; Moreira, A. Automatic RF Interference Maps and their relationship with Wi-Fi Positioning Errors. In Proceedings of the 2019 International Conference on Indoor Positioning and Indoor Navigation (IPIN), Pisa, Italy, 30 September 2019–3 October 2019; pp. 1–8. [Google Scholar] [CrossRef]
- Pendão, C. FastGraph—Unsupervised Location and Mapping in Wireless Networks. Ph.D. Thesis, University of Minho, Aveiro and Porto, Braga, Portugal, 2018. Available online: http://hdl.handle.net/1822/60425 (accessed on 7 June 2022).
- Silva, I.M.M. Self-healing Radio Maps of Wireless Networks for Indoor Positioning. Ph.D. Thesis, University of Minho, Aveiro and Porto, Braga, Portugal, 2022. Available online: http://hdl.handle.net/1822/77563 (accessed on 7 June 2022).
- Krumm, J.; Platt, J. Minimizing Calibration Efforts for an Indoor 802.11 Device Location Measurement System. In Microsoft Research; Tech. Report MSR-TR-2003-82; Microsoft Corporation One Microsoft Way: Redmond, WA, USA, 2003; pp. 1–9. [Google Scholar]
- Torres-Sospedra, J.; Jiménez, A.R.; Knauth, S.; Moreira, A.; Beer, Y.; Fetzer, T.; Ta, V.C.; Montoliu, R.; Seco, F.; Mendoza-Silva, G.M.; et al. The Smartphone-Based Offline Indoor Location Competition at IPIN 2016: Analysis and Future Work. Sensors 2017, 17, 557. [Google Scholar] [CrossRef] [PubMed]
Mon. Device | No. Wi-Fi Samples |
---|---|
RPi-C | 1,057,499 |
RPi-D | 918,134 |
RPi-E | 1,102,344 |
RPi-F | 1,101,154 |
RPi-G | 1,100,472 |
RPi-H | 1,072,646 |
RPi-I | 1,083,149 |
Total | 7,435,398 |
Site Survey | No. RPs | No. Wi-Fi Samples |
---|---|---|
19 February 2019 | 26 | 520 |
25 March 2019 | 43 | 860 |
11 June 2019 | 49 | 980 |
3 July 2019 | 49 | 980 |
29 July 2019 | 49 | 980 |
11 September 2019 | 48 | 960 |
9 October 2019 | 49 | 980 |
13 November 2019 | 49 | 980 |
11 December 2019 | 49 | 980 |
15 January 2020 | 49 | 980 |
19 February 2021 | 49 | 980 |
23 April 2021 | 48 | 960 |
Total | 11,140 |
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Silva, I.; Pendão, C.; Moreira, A. Collection of a Continuous Long-Term Dataset for the Evaluation of Wi-Fi-Fingerprinting-Based Indoor Positioning Systems. Sensors 2022, 22, 8585. https://doi.org/10.3390/s22228585
Silva I, Pendão C, Moreira A. Collection of a Continuous Long-Term Dataset for the Evaluation of Wi-Fi-Fingerprinting-Based Indoor Positioning Systems. Sensors. 2022; 22(22):8585. https://doi.org/10.3390/s22228585
Chicago/Turabian StyleSilva, Ivo, Cristiano Pendão, and Adriano Moreira. 2022. "Collection of a Continuous Long-Term Dataset for the Evaluation of Wi-Fi-Fingerprinting-Based Indoor Positioning Systems" Sensors 22, no. 22: 8585. https://doi.org/10.3390/s22228585