Journals

  1. A LoRaWAN Network Architecture with MQTT2MULTICAST
    Jorge Navarro-Ortiz, Natalia Chinchilla-Romero, Felix Delgado-Ferro, Juan Jose Ramos-Munoz
    Electronics, 11 (6), 2022, DOI: 10.3390/electronics11060872. (IF=2.397, Q3)
    "A LoRaWAN Network Architecture with MQTT2MULTICAST", Jorge Navarro-Ortiz, Natalia Chinchilla-Romero, Felix Delgado-Ferro, Juan Jose Ramos-Munoz, Electronics, 11 (6), 2022. DOI: 10.3390/electronics11060872
    close
    In this work, an architecture for IoT networks oriented towards environmental sustainability is presented. Due to the suitability of its characteristics in terms of coverage, power and support of a large number of devices, an enhanced LoRaWAN network has been chosen as the basis for this proposal. The architecture is completed with the virtualization of the different LoRaWAN network entities and the usage of a software-defined network for their interconnection. The publication and subscription to environmental data is carried out by using the MQTT protocol. MQTT has been optimized thanks to the use of the SDN network and the use of edge computing resources, which allows multicasting of published data. Thanks to our developed MQTT2MULTICAST protocol, latency is improved by approx. 90% and the traffic load within the SDN network is reduced by 55%. An scalability analysis shows that this solution is able to support tens of thousands of LoRaWAN gateways. The proposed architecture has been implemented using commercial equipment as a proof of concept.
    close
    @Article{electronics11060872,
    AUTHOR = {Navarro-Ortiz, Jorge and Chinchilla-Romero, Natalia and Delgado-Ferro, Felix and Ramos-Munoz, Juan Jose},
    TITLE = {A LoRaWAN Network Architecture with MQTT2MULTICAST},
    JOURNAL = {Electronics},
    VOLUME = {11},
    YEAR = {2022},
    NUMBER = {6},
    ARTICLE-NUMBER = {872},
    URL = {https://www.mdpi.com/2079-9292/11/6/872},
    ISSN = {2079-9292},
    ABSTRACT = {In this work, an architecture for IoT networks oriented towards environmental sustainability is presented. Due to the suitability of its characteristics in terms of coverage, power and support of a large number of devices, an enhanced LoRaWAN network has been chosen as the basis for this proposal. The architecture is completed with the virtualization of the different LoRaWAN network entities and the usage of a software-defined network for their interconnection. The publication and subscription to environmental data is carried out by using the MQTT protocol. MQTT has been optimized thanks to the use of the SDN network and the use of edge computing resources, which allows multicasting of published data. Thanks to our developed MQTT2MULTICAST protocol, latency is improved by approx. 90% and the traffic load within the SDN network is reduced by 55%. An scalability analysis shows that this solution is able to support tens of thousands of LoRaWAN gateways. The proposed architecture has been implemented using commercial equipment as a proof of concept.},
    DOI = {10.3390/electronics11060872},
    impact = {(IF=2.397, Q3)},
    project = {6gchronos|true5g|artemis|premonition}
    }
    close

  2. A LoRaWAN Architecture for Communications in Areas without Coverage: Design and Pilot Trials
    Felix Delgado-Ferro, Jorge Navarro-Ortiz, Natalia Chinchilla-Romero, Juan Jose Ramos-Munoz
    Electronics, 11 (5), 2022, DOI: 10.3390/electronics11050804. (IF=2.397, Q3)
    "A LoRaWAN Architecture for Communications in Areas without Coverage: Design and Pilot Trials", Felix Delgado-Ferro, Jorge Navarro-Ortiz, Natalia Chinchilla-Romero, Juan Jose Ramos-Munoz, Electronics, 11 (5), 2022. DOI: 10.3390/electronics11050804
    close
    This article proposes a system based on a long-distance communications system with low economic and energy costs that allows connectivity to be carried out independently from the existing cellular coverage in the area. In addition, it describes the design, development, implementation and analysis of an Internet of Things (IoT) architecture based on Long-Range Wide-Area Network (LoRaWAN). Moreover, the system has been deployed as a prototype, and the behavior and scope of the system have been analyzed in various real environments: urban, rural and natural. The results obtained from the analysis show that the system is suitable for working in areas without coverage such as mountains.
    close
    @Article{electronics11050804,
    AUTHOR = {Delgado-Ferro, Felix and Navarro-Ortiz, Jorge and Chinchilla-Romero, Natalia and Ramos-Munoz, Juan Jose},
    TITLE = {A LoRaWAN Architecture for Communications in Areas without Coverage: Design and Pilot Trials},
    JOURNAL = {Electronics},
    VOLUME = {11},
    YEAR = {2022},
    NUMBER = {5},
    ARTICLE-NUMBER = {804},
    URL = {https://www.mdpi.com/2079-9292/11/5/804},
    ISSN = {2079-9292},
    ABSTRACT = {This article proposes a system based on a long-distance communications system with low economic and energy costs that allows connectivity to be carried out independently from the existing cellular coverage in the area. In addition, it describes the design, development, implementation and analysis of an Internet of Things (IoT) architecture based on Long-Range Wide-Area Network (LoRaWAN). Moreover, the system has been deployed as a prototype, and the behavior and scope of the system have been analyzed in various real environments: urban, rural and natural. The results obtained from the analysis show that the system is suitable for working in areas without coverage such as mountains.},
    DOI = {10.3390/electronics11050804},
    impact = {(IF=2.397, Q3)},
    project = {6gchronos|true5g|artemis|premonition}
    }
    close

  3. Collision Avoidance Resource Allocation for LoRaWAN
    Natalia Chinchilla-Romero, Jorge Navarro-Ortiz, Pablo Muñoz, Pablo Ameigeiras
    Sensors, 21 (4), 2 2021, DOI: 10.3390/s21041218. (IF=3.275, Q1)
    "Collision Avoidance Resource Allocation for LoRaWAN", Natalia Chinchilla-Romero, Jorge Navarro-Ortiz, Pablo Muñoz, Pablo Ameigeiras, Sensors, 21 (4), 2021. DOI: 10.3390/s21041218
    close
    The number of connected IoT devices is significantly increasing and it is expected to reach more than two dozens of billions of IoT connections in the coming years. Low Power Wide Area Networks (LPWAN) have become very relevant for this new paradigm due to features such as large coverage and low power consumption. One of the most appealing technologies among these networks is LoRaWAN. Although it may be considered as one of the most mature LPWAN platforms, there are still open gaps such as its capacity limitations. For this reason, this work proposes a collision avoidance resource allocation algorithm named the Collision Avoidance Resource Allocation (CARA) algorithm with the objective of significantly increase system capacity. CARA leverages the multichannel structure and the orthogonality of spreading factors in LoRaWAN networks to avoid collisions among devices. Simulation results show that, assuming ideal radio link conditions, our proposal outperforms in 95.2% the capacity of a standard LoRaWAN network and increases the capacity by almost 40% assuming a realistic propagation model. In addition, it has been verified that CARA devices can coexist with LoRaWAN traditional devices, thus allowing the simultaneous transmissions of both types of devices. Moreover, a proof-of-concept has been implemented using commercial equipment in order to check the feasibility and the correct operation of our solution.
    close
    @ARTICLE{s21041218,
    AUTHOR = {Chinchilla-Romero, Natalia and Navarro-Ortiz, Jorge and Muñoz, Pablo and Ameigeiras, Pablo},
    TITLE = {Collision Avoidance Resource Allocation for {LoRaWAN}},
    JOURNAL = {Sensors},
    VOLUME = {21},
    YEAR = {2021},
    month=2,
    NUMBER = {4},
    ARTICLE-NUMBER = {1218},
    ISSN = {1424-8220},
    ABSTRACT = {The number of connected IoT devices is significantly increasing and it is expected to reach more than two dozens of billions of IoT connections in the coming years. Low Power Wide Area Networks (LPWAN) have become very relevant for this new paradigm due to features such as large coverage and low power consumption. One of the most appealing technologies among these networks is {LoRaWAN}. Although it may be considered as one of the most mature LPWAN platforms, there are still open gaps such as its capacity limitations. For this reason, this work proposes a collision avoidance resource allocation algorithm named the Collision Avoidance Resource Allocation (CARA) algorithm with the objective of significantly increase system capacity. CARA leverages the multichannel structure and the orthogonality of spreading factors in {LoRaWAN} networks to avoid collisions among devices. Simulation results show that, assuming ideal radio link conditions, our proposal outperforms in 95.2% the capacity of a standard {LoRaWAN} network and increases the capacity by almost 40% assuming a realistic propagation model. In addition, it has been verified that CARA devices can coexist with {LoRaWAN} traditional devices, thus allowing the simultaneous transmissions of both types of devices. Moreover, a proof-of-concept has been implemented using commercial equipment in order to check the feasibility and the correct operation of our solution.},
    DOI = {10.3390/s21041218},
    impact = {(IF=3.275, Q1)},
    pdf = {https://digibug.ugr.es/handle/10481/67701},
    project = {artemis|5gcity|5gclarity}
    }
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Conferences & Workshops

  1. WiMuNet's research lines
    J. Navarro-Ortiz, N. Chinchilla-Romero, L. Chinchilla-Romero, J. Prados-Garzon, F. Delgado-Ferro, P. Ameigeiras, P. Munoz-Luengo, J. J. Ramos-Munoz, J. M. Lopez-Soler
    VI Workshop on QoE, QoS on Multimedia Communications (QQCM'21), 2021.
    "WiMuNet's research lines", J. Navarro-Ortiz, N. Chinchilla-Romero, L. Chinchilla-Romero, J. Prados-Garzon, F. Delgado-Ferro, P. Ameigeiras, P. Munoz-Luengo, J. J. Ramos-Munoz, J. M. Lopez-Soler, "VI Workshop on QoE, QoS on Multimedia Communications (QQCM'21)", ISBN 9788409311248, 2021
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    @Inproceedings{jnavarroqqcm21, author={J. {Navarro-Ortiz} and N. {Chinchilla-Romero} and L. {Chinchilla-Romero} and J. {Prados-Garzon} and F. {Delgado-Ferro} and P. {Ameigeiras} and P. {Munoz-Luengo} and J. J. {Ramos-Munoz} and J. M. {Lopez-Soler}}, booktitle={VI Workshop on QoE, QoS on Multimedia Communications (QQCM'21)}, isbn={9788409311248}, title={WiMuNet's research lines}, year={2021}, url={https://sites.google.com/unizar.es/qqcm-2021/agenda}, project={5gclarity|true5g|artemis}}
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  2. Arquitectura para redes IoT orientada a la sostenibilidad medioambiental (IoT network architecture for environmental sustainability)
    J. Navarro-Ortiz, N. Chinchilla-Romero, F. Delgado-Ferro, J.J. Ramos-Munoz
    XV Jornadas de Ingeniería Telemática (JITEL 2021), 2021.
    "Arquitectura para redes IoT orientada a la sostenibilidad medioambiental (IoT network architecture for environmental sustainability)", J. Navarro-Ortiz, N. Chinchilla-Romero, F. Delgado-Ferro, J.J. Ramos-Munoz, "XV Jornadas de Ingeniería Telemática (JITEL 2021)", 2021
    close
    @INPROCEEDINGS{jnavarro_jitel21,  author={J. {Navarro-Ortiz} and N. {Chinchilla-Romero} and F. {Delgado-Ferro} and J.J. {Ramos-Munoz}},  booktitle={XV Jornadas de Ingeniería Telemática (JITEL 2021)}, title={Arquitectura para redes IoT orientada a la sostenibilidad medioambiental (IoT network architecture for environmental sustainability)}, year={2021}, project = {5gclarity|true5g|artemis}, pdf={https://digibug.ugr.es/handle/10481/71142}}
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  3. Arquitectura LoRaWAN para entornos sin cobertura (LoRaWAN network architecture for environments without coverage)
    F. Delgado-Ferro, J. Navarro-Ortiz, N. Chinchilla-Romero, J.J. Ramos-Munoz
    XV Jornadas de Ingeniería Telemática (JITEL 2021), 2021.
    "Arquitectura LoRaWAN para entornos sin cobertura (LoRaWAN network architecture for environments without coverage)", F. Delgado-Ferro, J. Navarro-Ortiz, N. Chinchilla-Romero, J.J. Ramos-Munoz, "XV Jornadas de Ingeniería Telemática (JITEL 2021)", 2021
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    @INPROCEEDINGS{fdelgado_jitel21b,  author={F. {Delgado-Ferro} and J. {Navarro-Ortiz} and N. {Chinchilla-Romero} and J.J. {Ramos-Munoz}},  booktitle={XV Jornadas de Ingeniería Telemática (JITEL 2021)}, title={Arquitectura LoRaWAN para entornos sin cobertura (LoRaWAN network architecture for environments without coverage)}, year={2021}, project = {true5g|artemis}, pdf={https://digibug.ugr.es/handle/10481/71143}}
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  4. Improving hardware security for LoRaWAN
    J. Navarro-Ortiz, N. Chinchilla-Romero, J. J. Ramos-Munoz, P. Munoz-Luengo
    2019 IEEE Conference on Standards for Communications and Networking (CSCN), pp. 1-6, 2019, DOI: 10.1109/CSCN.2019.8931397.
    "Improving hardware security for LoRaWAN", J. Navarro-Ortiz, N. Chinchilla-Romero, J. J. Ramos-Munoz, P. Munoz-Luengo, "2019 IEEE Conference on Standards for Communications and Networking (CSCN)", pp. 1-6, 2019. DOI: 10.1109/CSCN.2019.8931397
    close
    @Inproceedings{8931397,  author={J. {Navarro-Ortiz} and N. {Chinchilla-Romero} and J. J. {Ramos-Munoz} and P. {Munoz-Luengo}},  booktitle={2019 IEEE Conference on Standards for Communications and Networking (CSCN)},   title={Improving hardware security for LoRaWAN},   year={2019},  volume={},  number={},  pages={1-6},  doi={10.1109/CSCN.2019.8931397}, project="5gcity"}
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