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...
- 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.coQXV0b3Jpem8gKGF1dG9yaXphbW9zKSBhIGxhIEJpYmxpb3RlY2EgZGUgbGEgSW5zdGl0dWNpw7NuIHBhcmEgcXVlIGluY2x1eWEgdW5hIGNvcGlhLCBpbmRleGUgeSBkaXZ1bGd1ZSBlbiBlbCBSZXBvc2l0b3JpbyBJbnN0aXR1Y2lvbmFsLCBsYSBvYnJhIG1lbmNpb25hZGEgY29uIGVsIGZpbiBkZSBmYWNpbGl0YXIgbG9zIHByb2Nlc29zIGRlIHZpc2liaWxpZGFkIGUgaW1wYWN0byBkZSBsYSBtaXNtYSwgY29uZm9ybWUgYSBsb3MgZGVyZWNob3MgcGF0cmltb25pYWxlcyBxdWUgbWUobm9zKSBjb3JyZXNwb25kZShuKSB5IHF1ZSBpbmNsdXllbjogbGEgcmVwcm9kdWNjacOzbiwgY29tdW5pY2FjacOzbiBww7pibGljYSwgZGlzdHJpYnVjacOzbiBhbCBww7pibGljbywgdHJhbnNmb3JtYWNpw7NuLCBkZSBjb25mb3JtaWRhZCBjb24gbGEgbm9ybWF0aXZpZGFkIHZpZ2VudGUgc29icmUgZGVyZWNob3MgZGUgYXV0b3IgeSBkZXJlY2hvcyBjb25leG9zIHJlZmVyaWRvcyBlbiBhcnQuIDIsIDEyLCAzMCAobW9kaWZpY2FkbyBwb3IgZWwgYXJ0IDUgZGUgbGEgbGV5IDE1MjAvMjAxMiksIHkgNzIgZGUgbGEgbGV5IDIzIGRlIGRlIDE5ODIsIExleSA0NCBkZSAxOTkzLCBhcnQuIDQgeSAxMSBEZWNpc2nDs24gQW5kaW5hIDM1MSBkZSAxOTkzIGFydC4gMTEsIERlY3JldG8gNDYwIGRlIDE5OTUsIENpcmN1bGFyIE5vIDA2LzIwMDIgZGUgbGEgRGlyZWNjacOzbiBOYWNpb25hbCBkZSBEZXJlY2hvcyBkZSBhdXRvciwgYXJ0LiAxNSBMZXkgMTUyMCBkZSAyMDEyLCBsYSBMZXkgMTkxNSBkZSAyMDE4IHkgZGVtw6FzIG5vcm1hcyBzb2JyZSBsYSBtYXRlcmlhLgoKQWwgcmVzcGVjdG8gY29tbyBBdXRvcihlcykgbWFuaWZlc3RhbW9zIGNvbm9jZXIgcXVlOgoKLSBMYSBhdXRvcml6YWNpw7NuIGVzIGRlIGNhcsOhY3RlciBubyBleGNsdXNpdmEgeSBsaW1pdGFkYSwgZXN0byBpbXBsaWNhIHF1ZSBsYSBsaWNlbmNpYSB0aWVuZSB1bmEgdmlnZW5jaWEsIHF1ZSBubyBlcyBwZXJwZXR1YSB5IHF1ZSBlbCBhdXRvciBwdWVkZSBwdWJsaWNhciBvIGRpZnVuZGlyIHN1IG9icmEgZW4gY3VhbHF1aWVyIG90cm8gbWVkaW8sIGFzw60gY29tbyBsbGV2YXIgYSBjYWJvIGN1YWxxdWllciB0aXBvIGRlIGFjY2nDs24gc29icmUgZWwgZG9jdW1lbnRvLgoKLSBMYSBhdXRvcml6YWNpw7NuIHRlbmRyw6EgdW5hIHZpZ2VuY2lhIGRlIGNpbmNvIGHDsW9zIGEgcGFydGlyIGRlbCBtb21lbnRvIGRlIGxhIGluY2x1c2nDs24gZGUgbGEgb2JyYSBlbiBlbCByZXBvc2l0b3JpbywgcHJvcnJvZ2FibGUgaW5kZWZpbmlkYW1lbnRlIHBvciBlbCB0aWVtcG8gZGUgZHVyYWNpw7NuIGRlIGxvcyBkZXJlY2hvcyBwYXRyaW1vbmlhbGVzIGRlbCBhdXRvciB5IHBvZHLDoSBkYXJzZSBwb3IgdGVybWluYWRhIHVuYSB2ZXogZWwgYXV0b3IgbG8gbWFuaWZpZXN0ZSBwb3IgZXNjcml0byBhIGxhIGluc3RpdHVjacOzbiwgY29uIGxhIHNhbHZlZGFkIGRlIHF1ZSBsYSBvYnJhIGVzIGRpZnVuZGlkYSBnbG9iYWxtZW50ZSB5IGNvc2VjaGFkYSBwb3IgZGlmZXJlbnRlcyBidXNjYWRvcmVzIHkvbyByZXBvc2l0b3Jpb3MgZW4gSW50ZXJuZXQgbG8gcXVlIG5vIGdhcmFudGl6YSBxdWUgbGEgb2JyYSBwdWVkYSBzZXIgcmV0aXJhZGEgZGUgbWFuZXJhIGlubWVkaWF0YSBkZSBvdHJvcyBzaXN0ZW1hcyBkZSBpbmZvcm1hY2nDs24gZW4gbG9zIHF1ZSBzZSBoYXlhIGluZGV4YWRvLCBkaWZlcmVudGVzIGFsIHJlcG9zaXRvcmlvIGluc3RpdHVjaW9uYWwgZGUgbGEgSW5zdGl0dWNpw7NuLCBkZSBtYW5lcmEgcXVlIGVsIGF1dG9yKHJlcykgdGVuZHLDoW4gcXVlIHNvbGljaXRhciBsYSByZXRpcmFkYSBkZSBzdSBvYnJhIGRpcmVjdGFtZW50ZSBhIG90cm9zIHNpc3RlbWFzIGRlIGluZm9ybWFjacOzbiBkaXN0aW50b3MgYWwgZGUgbGEgSW5zdGl0dWNpw7NuIHNpIGRlc2VhIHF1ZSBzdSBvYnJhIHNlYSByZXRpcmFkYSBkZSBpbm1lZGlhdG8uCgotIExhIGF1dG9yaXphY2nDs24gZGUgcHVibGljYWNpw7NuIGNvbXByZW5kZSBlbCBmb3JtYXRvIG9yaWdpbmFsIGRlIGxhIG9icmEgeSB0b2RvcyBsb3MgZGVtw6FzIHF1ZSBzZSByZXF1aWVyYSBwYXJhIHN1IHB1YmxpY2FjacOzbiBlbiBlbCByZXBvc2l0b3Jpby4gSWd1YWxtZW50ZSwgbGEgYXV0b3JpemFjacOzbiBwZXJtaXRlIGEgbGEgaW5zdGl0dWNpw7NuIGVsIGNhbWJpbyBkZSBzb3BvcnRlIGRlIGxhIG9icmEgY29uIGZpbmVzIGRlIHByZXNlcnZhY2nDs24gKGltcHJlc28sIGVsZWN0csOzbmljbywgZGlnaXRhbCwgSW50ZXJuZXQsIGludHJhbmV0LCBvIGN1YWxxdWllciBvdHJvIGZvcm1hdG8gY29ub2NpZG8gbyBwb3IgY29ub2NlcikuCgotIExhIGF1dG9yaXphY2nDs24gZXMgZ3JhdHVpdGEgeSBzZSByZW51bmNpYSBhIHJlY2liaXIgY3VhbHF1aWVyIHJlbXVuZXJhY2nDs24gcG9yIGxvcyB1c29zIGRlIGxhIG9icmEsIGRlIGFjdWVyZG8gY29uIGxhIGxpY2VuY2lhIGVzdGFibGVjaWRhIGVuIGVzdGEgYXV0b3JpemFjacOzbi4KCi0gQWwgZmlybWFyIGVzdGEgYXV0b3JpemFjacOzbiwgc2UgbWFuaWZpZXN0YSBxdWUgbGEgb2JyYSBlcyBvcmlnaW5hbCB5IG5vIGV4aXN0ZSBlbiBlbGxhIG5pbmd1bmEgdmlvbGFjacOzbiBhIGxvcyBkZXJlY2hvcyBkZSBhdXRvciBkZSB0ZXJjZXJvcy4gRW4gY2FzbyBkZSBxdWUgZWwgdHJhYmFqbyBoYXlhIHNpZG8gZmluYW5jaWFkbyBwb3IgdGVyY2Vyb3MgZWwgbyBsb3MgYXV0b3JlcyBhc3VtZW4gbGEgcmVzcG9uc2FiaWxpZGFkIGRlbCBjdW1wbGltaWVudG8gZGUgbG9zIGFjdWVyZG9zIGVzdGFibGVjaWRvcyBzb2JyZSBsb3MgZGVyZWNob3MgcGF0cmltb25pYWxlcyBkZSBsYSBvYnJhIGNvbiBkaWNobyB0ZXJjZXJvLgoKLSBGcmVudGUgYSBjdWFscXVpZXIgcmVjbGFtYWNpw7NuIHBvciB0ZXJjZXJvcywgZWwgbyBsb3MgYXV0b3JlcyBzZXLDoW4gcmVzcG9uc2FibGVzLCBlbiBuaW5nw7puIGNhc28gbGEgcmVzcG9uc2FiaWxpZGFkIHNlcsOhIGFzdW1pZGEgcG9yIGxhIGluc3RpdHVjacOzbi4KCi0gQ29uIGxhIGF1dG9yaXphY2nDs24sIGxhIGluc3RpdHVjacOzbiBwdWVkZSBkaWZ1bmRpciBsYSBvYnJhIGVuIMOtbmRpY2VzLCBidXNjYWRvcmVzIHkgb3Ryb3Mgc2lzdGVtYXMgZGUgaW5mb3JtYWNpw7NuIHF1ZSBmYXZvcmV6Y2FuIHN1IHZpc2liaWxpZGFkCgo= |