LoRAWAN network coverage testing design using open-source low-cost hardware

The Internet of Things (IoT) is considered to be one of the most radical technological advances of the century. The increasing amount of applications and devices, requires the deployment of a large network infrastructure to provide with reliable communication. However, existing communication technol...

Full description

Autores:
Paternina, C.
Arnedo, R.
Domínguez Jiménez, Juan Antonio
Campillo Jiménez, Javier Eduardo
Tipo de recurso:
Fecha de publicación:
2020
Institución:
Universidad Tecnológica de Bolívar
Repositorio:
Repositorio Institucional UTB
Idioma:
eng
OAI Identifier:
oai:repositorio.utb.edu.co:20.500.12585/9993
Acceso en línea:
https://hdl.handle.net/20.500.12585/9993
https://ieeexplore.ieee.org/document/9272128
Palabra clave:
LPWAN
LoRaWAN
Internet-of-Things
Sensors
Open-Source
Rights
closedAccess
License
http://purl.org/coar/access_right/c_14cb
id UTB2_53fc390e0a8cf50da9afea8bc8642133
oai_identifier_str oai:repositorio.utb.edu.co:20.500.12585/9993
network_acronym_str UTB2
network_name_str Repositorio Institucional UTB
repository_id_str
dc.title.spa.fl_str_mv LoRAWAN network coverage testing design using open-source low-cost hardware
title LoRAWAN network coverage testing design using open-source low-cost hardware
spellingShingle LoRAWAN network coverage testing design using open-source low-cost hardware
LPWAN
LoRaWAN
Internet-of-Things
Sensors
Open-Source
title_short LoRAWAN network coverage testing design using open-source low-cost hardware
title_full LoRAWAN network coverage testing design using open-source low-cost hardware
title_fullStr LoRAWAN network coverage testing design using open-source low-cost hardware
title_full_unstemmed LoRAWAN network coverage testing design using open-source low-cost hardware
title_sort LoRAWAN network coverage testing design using open-source low-cost hardware
dc.creator.fl_str_mv Paternina, C.
Arnedo, R.
Domínguez Jiménez, Juan Antonio
Campillo Jiménez, Javier Eduardo
dc.contributor.author.none.fl_str_mv Paternina, C.
Arnedo, R.
Domínguez Jiménez, Juan Antonio
Campillo Jiménez, Javier Eduardo
dc.subject.keywords.spa.fl_str_mv LPWAN
LoRaWAN
Internet-of-Things
Sensors
Open-Source
topic LPWAN
LoRaWAN
Internet-of-Things
Sensors
Open-Source
description The Internet of Things (IoT) is considered to be one of the most radical technological advances of the century. The increasing amount of applications and devices, requires the deployment of a large network infrastructure to provide with reliable communication. However, existing communication technologies could be energy demanding and not suitable for applications where a constant energy supply is not available (e.g. battery-powered sensors). Low-Power Wide Area Network (LPWAN) communication technologies appear to fill in this gap, with LoRaWAN as one of the most popular ones, given its low cost of implementation, reliability and coverage. Operating on the frequency band below 1GHz, it is possible to cover larger areas than more mature technologies, such as the IEEE802.11x (Wifi) standard. The aim of this work is to present a low-cost open-source based technical solution and measurement procedure for determining the network coverage of a LoRaWAN network, in dense urban environments. By measuring connection link quality parameters, it was possible to establish a testing methodology to determining the operational coverage of the network implemented. Obtained results show an average coverage between 7 and 10 km per gateway and that the most outstanding combination of spreading factor and coding rate was SF10-CR4. This study offers great insights for proper planning and validation of LoRaWAN based IoT networks.
publishDate 2020
dc.date.issued.none.fl_str_mv 2020-12-01
dc.date.accessioned.none.fl_str_mv 2021-02-15T15:53:56Z
dc.date.available.none.fl_str_mv 2021-02-15T15:53:56Z
dc.date.submitted.none.fl_str_mv 2021-02-12
dc.type.coarversion.fl_str_mv http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.driver.spa.fl_str_mv info:eu-repo/semantics/lecture
dc.type.hasversion.spa.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.spa.spa.fl_str_mv http://purl.org/coar/resource_type/c_8544
status_str publishedVersion
dc.identifier.citation.spa.fl_str_mv C. Paternina, R. Arnedo, J. A. Dominguez-Jimenez and J. Campillo, "LoRAWAN Network Coverage Testing Design using Open-source Low-Cost Hardware," 2020 IEEE ANDESCON, Quito, Ecuador, 2020, pp. 1-6, doi: 10.1109/ANDESCON50619.2020.9272128.
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/20.500.12585/9993
dc.identifier.url.none.fl_str_mv https://ieeexplore.ieee.org/document/9272128
dc.identifier.doi.none.fl_str_mv 10.1109/ANDESCON50619.2020.9272128
dc.identifier.instname.spa.fl_str_mv Universidad Tecnológica de Bolívar
dc.identifier.reponame.spa.fl_str_mv Repositorio Universidad Tecnológica de Bolívar
identifier_str_mv C. Paternina, R. Arnedo, J. A. Dominguez-Jimenez and J. Campillo, "LoRAWAN Network Coverage Testing Design using Open-source Low-Cost Hardware," 2020 IEEE ANDESCON, Quito, Ecuador, 2020, pp. 1-6, doi: 10.1109/ANDESCON50619.2020.9272128.
10.1109/ANDESCON50619.2020.9272128
Universidad Tecnológica de Bolívar
Repositorio Universidad Tecnológica de Bolívar
url https://hdl.handle.net/20.500.12585/9993
https://ieeexplore.ieee.org/document/9272128
dc.language.iso.spa.fl_str_mv eng
language eng
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_14cb
dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/closedAccess
eu_rights_str_mv closedAccess
rights_invalid_str_mv http://purl.org/coar/access_right/c_14cb
dc.format.extent.none.fl_str_mv 6 páginas
dc.format.mimetype.spa.fl_str_mv application/pdf
dc.publisher.place.spa.fl_str_mv Cartagena de Indias
dc.source.spa.fl_str_mv 2020 IEEE ANDESCON
institution Universidad Tecnológica de Bolívar
bitstream.url.fl_str_mv https://repositorio.utb.edu.co/bitstream/20.500.12585/9993/1/153.pdf
https://repositorio.utb.edu.co/bitstream/20.500.12585/9993/2/license.txt
https://repositorio.utb.edu.co/bitstream/20.500.12585/9993/3/153.pdf.txt
https://repositorio.utb.edu.co/bitstream/20.500.12585/9993/4/153.pdf.jpg
bitstream.checksum.fl_str_mv 0e337594dbd5143b8609b155f7c553c6
e20ad307a1c5f3f25af9304a7a7c86b6
ee883b3a066cf7578fea54bab28bff24
19d9ec2b42dbbb83222272bb29878c56
bitstream.checksumAlgorithm.fl_str_mv MD5
MD5
MD5
MD5
repository.name.fl_str_mv Repositorio Institucional UTB
repository.mail.fl_str_mv repositorioutb@utb.edu.co
_version_ 1814021634040791040
spelling Paternina, C.4e1a9f95-13e8-4065-90ae-ca51107950aeArnedo, R.2bf47d65-f69b-486a-8ac2-44d6a9e6ca1dDomínguez Jiménez, Juan Antonio160c55ef-4ca7-4f46-96d9-c93fc2ef66bdCampillo Jiménez, Javier Eduardo8c4725e9-5e97-40df-b9ae-f67c73617ff32021-02-15T15:53:56Z2021-02-15T15:53:56Z2020-12-012021-02-12C. Paternina, R. Arnedo, J. A. Dominguez-Jimenez and J. Campillo, "LoRAWAN Network Coverage Testing Design using Open-source Low-Cost Hardware," 2020 IEEE ANDESCON, Quito, Ecuador, 2020, pp. 1-6, doi: 10.1109/ANDESCON50619.2020.9272128.https://hdl.handle.net/20.500.12585/9993https://ieeexplore.ieee.org/document/927212810.1109/ANDESCON50619.2020.9272128Universidad Tecnológica de BolívarRepositorio Universidad Tecnológica de BolívarThe Internet of Things (IoT) is considered to be one of the most radical technological advances of the century. The increasing amount of applications and devices, requires the deployment of a large network infrastructure to provide with reliable communication. However, existing communication technologies could be energy demanding and not suitable for applications where a constant energy supply is not available (e.g. battery-powered sensors). Low-Power Wide Area Network (LPWAN) communication technologies appear to fill in this gap, with LoRaWAN as one of the most popular ones, given its low cost of implementation, reliability and coverage. Operating on the frequency band below 1GHz, it is possible to cover larger areas than more mature technologies, such as the IEEE802.11x (Wifi) standard. The aim of this work is to present a low-cost open-source based technical solution and measurement procedure for determining the network coverage of a LoRaWAN network, in dense urban environments. By measuring connection link quality parameters, it was possible to establish a testing methodology to determining the operational coverage of the network implemented. Obtained results show an average coverage between 7 and 10 km per gateway and that the most outstanding combination of spreading factor and coding rate was SF10-CR4. This study offers great insights for proper planning and validation of LoRaWAN based IoT networks.6 páginasapplication/pdfeng2020 IEEE ANDESCONLoRAWAN network coverage testing design using open-source low-cost hardwareinfo:eu-repo/semantics/lectureinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_8544http://purl.org/coar/version/c_970fb48d4fbd8a85LPWANLoRaWANInternet-of-ThingsSensorsOpen-Sourceinfo:eu-repo/semantics/closedAccesshttp://purl.org/coar/access_right/c_14cbCartagena de IndiasInvestigadoresM. Alenezi, K. K. Chai, Y. Chen and S. Jimaa, "Ultra-dense LoRaWAN: Reviews and challenges", IET Communications, vol. 14, no. 9, pp. 1361-1371, Jun. 2020, [online] Available: https://digital-library.theiet.org/content/journals/10.1049/iet-com.2018.6128.H. Espinoza, G. Kling, F. McGroarty, M. O’Mahony and X. Ziouvelou, "Estimating the impact of the Internet of Things on productivity in Eu-rope", Heliyon, vol. 6, no. 5, pp. e03935, May 2020, [online] Available: https://linkinghub.elsevier.com/retrieve/pii/S2405844020307805.A. Zourmand, A. L. Kun Hing, C. Wai Hung and M. AbdulRehman, "Internet of Things (IoT) using LoRa technology", 2019 IEEE International Conference on Automatic Control and Intelligent Systems (I2CACIS), pp. 324-330, Jun. 2019, [online] Available: https://ieeexplore.ieee.org/document/8825008/.N. S. Knyazev, V. A. Chechetkin and D. A. Letavin, "Comparative analysis of standards for Low-power Wide-area Network", 2017 Systems of Signal Synchronization Generating and Processing in Telecommunications (SINKHROINFO), pp. 1-4, Jul. 2017, [online] Available: http://ieeexplore.ieee.org/document/7997528/.L. Slats, "A Brief History of LoRa®: Three Inventors Share Their Personal Story at The Things Conference", Jan. 2020, [online] Available: https://blog.semtech.com/a-brief-history-of-lora-three-inventors-share-their-personal-story-at-the-things-conference.F. J. Grion, G. O. Petracca, D. F. Lipuma and E. R. Amigo, "LoRa network coverage evaluation in urban and densely urban enviroment simulation and validation tests in Autonomous City of Buenos Aires", 2017 XVII Workshop on Information Processing and Control (RPIC), pp. 1-5, Sep. 2017, [online] Available: http://ieeexplore.ieee.org/document/8214345/.M. R. Seye, B. Gueye and M. Diallo, "An evaluation of lora coverage in dakar peninsula", 2017 8th IEEE Annual Information Technology Electronics and Mobile Communication Conference (IEMCON), pp. 478-482, 2017.G. D. Campo, I. Gomez, S. Calatrava, R. Martinez and A. Santamaria, "Power distribution monitoring using lora: coverage analysis in sub-urban areas", Proceedings of the 2018 International Conference on Embedded Wireless Systems and Networks, pp. 233-238, 2018.S. Sagir, I. Kaya, C. Sisman, Y. Baltaci and S. Unal, "Evaluation of Low-Power Long Distance Radio Communication in Urban Areas: LoRa and Impact of Spreading Factor", 2019 Seventh International Conference on Digital Information Processing and Communications (ICDIPC), pp. 68-71, May 2019, [online] Available: https://ieeexplore.ieee.org/document/8723666/.R. Sanchez-Iborra, J. Sanchez-Gomez, J. Ballesta-Viñas, M.-D. Cano and A. Skarmeta, "Performance Evaluation of LoRa Considering Scenario Conditions", Sensors, vol. 18, no. 3, pp. 772, Mar. 2018, [online] Available: http://www.mdpi.com/1424-8220/18/3/772.L. Li, J. Ren and Q. Zhu, "On the application of lora lpwan technology in sailing monitoring system", 2017 13th Annual Conference on Wireless On-demand Network Systems and Services (WONS), pp. 77-80, 2017.M. J. Covington and R. Carskadden, "Threat implications of the internet of things", 2013 5th International Conference on Cyber Conflict (CYCON 2013), pp. 1-12, 2013.Y. Sui, I. Guvenc and T. Svensson, "Interference management for moving networks in ultra-dense urban scenarios", EURASIP Journal on Wireless Communications and Networking, vol. 2015, no. 1, pp. 111, 2015.A. Pyattaev, K. Johnsson, S. Andreev and Y. Koucheryavy, "Commu-nication challenges in high-density deployments of wearable wireless devices", IEEE Wireless Communications, vol. 22, no. 1, pp. 12-18, 2015.L. Kolobe, B. Sigweni and C. K. Lebekwe, "Systematic literature survey: applications of lora communication", International Journal of Electrical & Computer Engineering (2088-8708), vol. 10, 2020.A. Pitì, G. Verticale, C. Rottondi, A. Capone and L. Lo Schiavo, "The role of smart meters in enabling real-time energy services for households: The italian case", Energies, vol. 10, no. 2, pp. 199, 2017.T. T. Nguyen, H. H. Nguyen, R. Barton and P. Grossetete, "Efficient Design of Chirp Spread Spectrum Modulation for Low-Power Wide-Area Networks", IEEE Internet of Things Journal, vol. 6, no. 6, pp. 9503-9515, Dec. 2019, [online] Available: https://ieeexplore.ieee.org/document/8765617/.LoRa Alliance, "LoRaWAN® Regional Parameters RP002-1.0.0", 2019."CloudRF - Model the future", [online] Available: https://cloudrf.com/.S. Kasampalis, P. I. Lazaridis, Z. D. Zaharis, A. Bizopoulos and J. Cos-mas, "Comparison of Longley-Rice ITM and ITWOM propagation models for DTV and FM Broadcasting".N. S. Bezerra, C. Ahlund, S. Saguna and V. A. de Sousa, "Propagation Model Evaluation for LoRaWAN: Planning Tool Versus Real Case Scenario", 2019 IEEE 5th World Forum on Internet of Things (WF-IoT), pp. 1-6, Apr. 2019, [online] Available: https://ieeexplore.ieee.org/document/8767299/."Geoportal del DANE - Geovisor Análisis Geoespacial del CNPV 2018", [online] Available: https://geoportal.dane.gov.co/geovisores/territorio/analisis-cnpv-2018/?lt=4.646075lg=-74.088605z=18.http://purl.org/coar/resource_type/c_c94fORIGINAL153.pdf153.pdfAbstractapplication/pdf88943https://repositorio.utb.edu.co/bitstream/20.500.12585/9993/1/153.pdf0e337594dbd5143b8609b155f7c553c6MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-83182https://repositorio.utb.edu.co/bitstream/20.500.12585/9993/2/license.txte20ad307a1c5f3f25af9304a7a7c86b6MD52TEXT153.pdf.txt153.pdf.txtExtracted texttext/plain1538https://repositorio.utb.edu.co/bitstream/20.500.12585/9993/3/153.pdf.txtee883b3a066cf7578fea54bab28bff24MD53THUMBNAIL153.pdf.jpg153.pdf.jpgGenerated Thumbnailimage/jpeg64223https://repositorio.utb.edu.co/bitstream/20.500.12585/9993/4/153.pdf.jpg19d9ec2b42dbbb83222272bb29878c56MD5420.500.12585/9993oai:repositorio.utb.edu.co:20.500.12585/99932023-05-26 08:13:35.454Repositorio Institucional UTBrepositorioutb@utb.edu.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