Juan Manuel López Soler

Full Professor

Journals

  1. 5G Infrastructure Network Slicing: E2E Mean Delay Model and Effectiveness Assessment to Reduce Downtimes in Industry 4.0
    Lorena Chinchilla-Romero, Jonathan Prados-Garzon, Pablo Ameigeiras, Pablo Muñoz, Juan M. Lopez-Soler
    Sensors, 22 (1), 2022, DOI: 10.3390/s22010229. (IF = 3.275, Q1)
    "5G Infrastructure Network Slicing: E2E Mean Delay Model and Effectiveness Assessment to Reduce Downtimes in Industry 4.0", Lorena Chinchilla-Romero, Jonathan Prados-Garzon, Pablo Ameigeiras, Pablo Muñoz, Juan M. Lopez-Soler, Sensors, 22 (1), 2022. DOI: 10.3390/s22010229
    close
    Fifth Generation (5G) is expected to meet stringent performance network requisites of the Industry 4.0. Moreover, its built-in network slicing capabilities allow for the support of the traffic heterogeneity in Industry 4.0 over the same physical network infrastructure. However, 5G network slicing capabilities might not be enough in terms of degree of isolation for many private 5G networks use cases, such as multi-tenancy in Industry 4.0. In this vein, infrastructure network slicing, which refers to the use of dedicated and well isolated resources for each network slice at every network domain, fits the necessities of those use cases. In this article, we evaluate the effectiveness of infrastructure slicing to provide isolation among production lines (PLs) in an industrial private 5G network. To that end, we develop a queuing theory-based model to estimate the end-to-end (E2E) mean packet delay of the infrastructure slices. Then, we use this model to compare the E2E mean delay for two configurations, i.e., dedicated infrastructure slices with segregated resources for each PL against the use of a single shared infrastructure slice to serve the performance-sensitive traffic from PLs. Also we evaluate the use of Time-Sensitive Networking (TSN) against bare Ethernet to provide layer 2 connectivity among the 5G system components. We use a complete and realistic setup based on experimental and simulation data of the scenario considered. Our results support the effectiveness of infrastructure slicing to provide isolation in performance among the different slices. Then, using dedicated slices with segregated resources for each PL might reduce the number of the production downtimes and associated costs as the malfunctioning of a PL will not affect the network performance perceived by the performance-sensitive traffic from other PLs. Last, our results show that, besides the improvement in performance, TSN technology truly provides full isolation in the transport network compared to standard Ethernet thanks to traffic prioritization, traffic regulation, and bandwidth reservation capabilities.
    close
    @Article{s22010229,
    AUTHOR = {Chinchilla-Romero, Lorena and Prados-Garzon, Jonathan and Ameigeiras, Pablo and Muñoz, Pablo and Lopez-Soler, Juan M.},
    TITLE = {5G Infrastructure Network Slicing: E2E Mean Delay Model and Effectiveness Assessment to Reduce Downtimes in Industry 4.0},
    JOURNAL = {Sensors},
    VOLUME = {22},
    YEAR = {2022},
    NUMBER = {1},
    ARTICLE-NUMBER = {229},
    URL = {https://www.mdpi.com/1424-8220/22/1/229},
    PubMedID = {35009771},
    ISSN = {1424-8220},
    ABSTRACT = {Fifth Generation (5G) is expected to meet stringent performance network requisites of the Industry 4.0. Moreover, its built-in network slicing capabilities allow for the support of the traffic heterogeneity in Industry 4.0 over the same physical network infrastructure. However, 5G network slicing capabilities might not be enough in terms of degree of isolation for many private 5G networks use cases, such as multi-tenancy in Industry 4.0. In this vein, infrastructure network slicing, which refers to the use of dedicated and well isolated resources for each network slice at every network domain, fits the necessities of those use cases. In this article, we evaluate the effectiveness of infrastructure slicing to provide isolation among production lines (PLs) in an industrial private 5G network. To that end, we develop a queuing theory-based model to estimate the end-to-end (E2E) mean packet delay of the infrastructure slices. Then, we use this model to compare the E2E mean delay for two configurations, i.e., dedicated infrastructure slices with segregated resources for each PL against the use of a single shared infrastructure slice to serve the performance-sensitive traffic from PLs. Also we evaluate the use of Time-Sensitive Networking (TSN) against bare Ethernet to provide layer 2 connectivity among the 5G system components. We use a complete and realistic setup based on experimental and simulation data of the scenario considered. Our results support the effectiveness of infrastructure slicing to provide isolation in performance among the different slices. Then, using dedicated slices with segregated resources for each PL might reduce the number of the production downtimes and associated costs as the malfunctioning of a PL will not affect the network performance perceived by the performance-sensitive traffic from other PLs. Last, our results show that, besides the improvement in performance, TSN technology truly provides full isolation in the transport network compared to standard Ethernet thanks to traffic prioritization, traffic regulation, and bandwidth reservation capabilities.},
    DOI = {10.3390/s22010229},
    project={5gclarity|true5g},
    impact={(IF = 3.275, Q1)}
    }
    close

  2. A Complete LTE Mathematical Framework for the Network Slice Planning of the EPC
    J. Prados-Garzon, A. Laghrissi, M. Bagaa, T. Taleb, J. M. Lopez-Soler
    IEEE Transactions on Mobile Computing, 19 (1), pp. 1-14, Jan 2020, DOI: 10.1109/TMC.2018.2890235. (IF=5.112, Q1)
    "A Complete LTE Mathematical Framework for the Network Slice Planning of the EPC", J. Prados-Garzon, A. Laghrissi, M. Bagaa, T. Taleb, J. M. Lopez-Soler, IEEE Transactions on Mobile Computing, 19 (1), pp. 1-14, 2020. DOI: 10.1109/TMC.2018.2890235
    close
    5G is the next telecommunications standards that will enable the sharing of physical infrastructures to provision ultra shortlatency applications, mobile broadband services, Internet of Things, etc. Network slicing is the virtualization technique that is expected to achieve that, as it can allow logical networks to run on top of a common physical infrastructure and ensure service level agreement requirements for different services and applications. In this vein, our paper proposes a novel and complete solution for planning network slices of the LTE EPC, tailored for the enhanced Mobile BroadBand use case. The solution defines a framework which consists of: i) an abstraction of the LTE workload generation process, ii) a compound traffic model, iii) performance models of the whole LTE network, and iv) an algorithm to jointly perform the resource dimensioning and network embedding. Our results show that the aggregated signaling generation is a Poisson process and the data traffic exhibits self-similarity and long-range-dependence features. The proposed performance models for the LTE network rely on these results. We formulate the joint optimization problem of resources dimensioning and embedding of a virtualized EPC and propose a heuristic to solve it. By using simulation tools, we validate the proper operation of our solution.
    close
    @ARTICLE{8603789,  author={J. {Prados-Garzon} and A. {Laghrissi} and M. {Bagaa} and T. {Taleb} and J. M. {Lopez-Soler}},  journal={IEEE Transactions on Mobile Computing},   title={A Complete LTE Mathematical Framework for the Network Slice Planning of the EPC},   year={2020},  volume={19},  number={1},  pages={1-14},  abstract={5G is the next telecommunications standards that will enable the sharing of physical infrastructures to provision ultra shortlatency applications, mobile broadband services, Internet of Things, etc. Network slicing is the virtualization technique that is expected to achieve that, as it can allow logical networks to run on top of a common physical infrastructure and ensure service level agreement requirements for different services and applications. In this vein, our paper proposes a novel and complete solution for planning network slices of the LTE EPC, tailored for the enhanced Mobile BroadBand use case. The solution defines a framework which consists of: i) an abstraction of the LTE workload generation process, ii) a compound traffic model, iii) performance models of the whole LTE network, and iv) an algorithm to jointly perform the resource dimensioning and network embedding. Our results show that the aggregated signaling generation is a Poisson process and the data traffic exhibits self-similarity and long-range-dependence features. The proposed performance models for the LTE network rely on these results. We formulate the joint optimization problem of resources dimensioning and embedding of a virtualized EPC and propose a heuristic to solve it. By using simulation tools, we validate the proper operation of our solution.},  keywords={Long Term Evolution;Planning;Quality of service;Analytical models;Logic gates;Optimization;5G mobile communication;LTE;EPC;network slicing;NFV;softwarized networks;mobile networks;traffic characterization;resources dimensioning;network embedding},  doi={10.1109/TMC.2018.2890235},  ISSN={1558-0660},  month={Jan}, impact={(IF=5.112, Q1)}, project={5gcity}}
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  3. A Survey on 5G Usage Scenarios and Traffic Models
    J. Navarro-Ortiz, P. Romero-Diaz, S. Sendra, P. Ameigeiras, J. J. Ramos-Munoz, J. M. Lopez-Soler
    IEEE Communications Surveys Tutorials, 22 (2), pp. 905-929, 2 2020, DOI: 10.1109/COMST.2020.2971781. (IF=23.7, Q1)
    "A Survey on 5G Usage Scenarios and Traffic Models", J. Navarro-Ortiz, P. Romero-Diaz, S. Sendra, P. Ameigeiras, J. J. Ramos-Munoz, J. M. Lopez-Soler, IEEE Communications Surveys Tutorials, 22 (2), pp. 905-929, 2020. DOI: 10.1109/COMST.2020.2971781
    close
    @Article{8985528,  author={J. {Navarro-Ortiz} and P. {Romero-Diaz} and S. {Sendra} and P. {Ameigeiras} and J. J. {Ramos-Munoz} and J. M. {Lopez-Soler}},  journal={{IEEE} Communications Surveys Tutorials}, title={A Survey on 5G Usage Scenarios and Traffic Models}, year={2020}, month=2, volume={22}, number={2}, pages={905-929}, doi={10.1109/COMST.2020.2971781}, project="artemis|5gclarity|5gcity", impact = {(IF=23.7, Q1)}, pdf={https://digibug.ugr.es/handle/10481/59687}}
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  4. Harmonizing 3GPP and NFV Description Models: Providing Customized RAN Slices in 5G Networks
    O. Adamuz-Hinojosa, P. Muñoz, J. Ordonez-Lucena, J. J. Ramos-Munoz, J. M. Lopez-Soler
    IEEE Vehicular Technology Magazine, 14 (4), pp. 64-75, Dec 2019, DOI: 10.1109/MVT.2019.2936168. (IF=7.921, Q1)
    "Harmonizing 3GPP and NFV Description Models: Providing Customized RAN Slices in 5G Networks", O. Adamuz-Hinojosa, P. Muñoz, J. Ordonez-Lucena, J. J. Ramos-Munoz, J. M. Lopez-Soler, IEEE Vehicular Technology Magazine, 14 (4), pp. 64-75, 2019. DOI: 10.1109/MVT.2019.2936168
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    The standardization of radio access networks (RANs) in mobile networks has traditionally been led by the 3rd Generation Partnership Project (3GPP). However, the emergence of RAN slicing has introduced new aspects that fall outside the 3GPP scope. Among them, network virtualization enables the particularization of multiple behaviors over a common physical infrastructure. Using virtualized network functions (VNFs) that comprise customized radio functionalities, each virtualized RAN (i.e., RAN slice) could meet its specific requirements. Although the 3GPP specifies the description model to manage RAN slices, it can neither particularize the behavior of a RAN slice nor leverage the network function virtualization (NFV) descriptors to define how its VNFs can accommodate its spatial and temporal traffic demands. In this article, we propose a description model that harmonizes 3GPP and the European Telecommunication Standard Institute (ETSI)-NFV Group viewpoints to manage RAN slices. The proposed model enables the translation of RAN slice requirements into customized, virtualized radio functionalities defined through NFV descriptors. To clarify this proposal, we provide an example describing three RAN slices with disruptive requirements following our solution.
    close
    @ARTICLE{8854309,  author={O. {Adamuz-Hinojosa} and P. {Muñoz} and J. {Ordonez-Lucena} and J. J. {Ramos-Munoz} and J. M. {Lopez-Soler}},  journal={IEEE Vehicular Technology Magazine},   title={Harmonizing 3GPP and NFV Description Models: Providing Customized RAN Slices in 5G Networks},   year={2019},  volume={14},  number={4},  pages={64-75},  abstract={The standardization of radio access networks (RANs) in mobile networks has traditionally been led by the 3rd Generation Partnership Project (3GPP). However, the emergence of RAN slicing has introduced new aspects that fall outside the 3GPP scope. Among them, network virtualization enables the particularization of multiple behaviors over a common physical infrastructure. Using virtualized network functions (VNFs) that comprise customized radio functionalities, each virtualized RAN (i.e., RAN slice) could meet its specific requirements. Although the 3GPP specifies the description model to manage RAN slices, it can neither particularize the behavior of a RAN slice nor leverage the network function virtualization (NFV) descriptors to define how its VNFs can accommodate its spatial and temporal traffic demands. In this article, we propose a description model that harmonizes 3GPP and the European Telecommunication Standard Institute (ETSI)-NFV Group viewpoints to manage RAN slices. The proposed model enables the translation of RAN slice requirements into customized, virtualized radio functionalities defined through NFV descriptors. To clarify this proposal, we provide an example describing three RAN slices with disruptive requirements following our solution.},  keywords={3GPP;Biological system modeling;5G mobile communication;Virtualization;Vehicular and wireless technologies;Radio access networks},  doi={10.1109/MVT.2019.2936168},  ISSN={1556-6080},  month={Dec},impact={(IF=7.921, Q1)}, project={5gcity}, pdf={https://digibug.ugr.es/handle/10481/68200}}
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  5. Performance Modeling of Softwarized Network Services Based on Queuing Theory With Experimental Validation
    J. Prados-Garzon, P. Ameigeiras, J. J. Ramos-Munoz, J. Navarro-Ortiz, P. Andres-Maldonado, J. M. Lopez-Soler
    IEEE Transactions on Mobile Computing, 20 (4), pp. 1558-1573, 12 2019, DOI: 10.1109/TMC.2019.2962488. (IF=5.112, Q1)
    "Performance Modeling of Softwarized Network Services Based on Queuing Theory With Experimental Validation", J. Prados-Garzon, P. Ameigeiras, J. J. Ramos-Munoz, J. Navarro-Ortiz, P. Andres-Maldonado, J. M. Lopez-Soler, IEEE Transactions on Mobile Computing, 20 (4), pp. 1558-1573, 2019. DOI: 10.1109/TMC.2019.2962488
    close
    @Article{8943161,  author={J. {Prados-Garzon} and P. {Ameigeiras} and J. J. {Ramos-Munoz} and J. {Navarro-Ortiz} and P. {Andres-Maldonado} and J. M. {Lopez-Soler}},  journal={{IEEE} Transactions on Mobile Computing},   title={Performance Modeling of Softwarized Network Services Based on Queuing Theory With Experimental Validation},   year={2019}, month={12},  volume={20},  number={4},  pages={1558-1573},  doi={10.1109/TMC.2019.2962488}, project="5gclarity|5gcity", impact={(IF=5.112, Q1)}, pdf={https://digibug.ugr.es/handle/10481/59700}}
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  6. Analytical Modeling and Experimental Validation of NB-IoT Device Energy Consumption
    P. Andres-Maldonado, M. Lauridsen, P. Ameigeiras, J. M. Lopez-Soler
    IEEE Internet of Things Journal, 6 (3), pp. 5691-5701, June 2019, DOI: 10.1109/JIOT.2019.2904802. (IF=9.936, Q1)
    "Analytical Modeling and Experimental Validation of NB-IoT Device Energy Consumption", P. Andres-Maldonado, M. Lauridsen, P. Ameigeiras, J. M. Lopez-Soler, IEEE Internet of Things Journal, 6 (3), pp. 5691-5701, 2019. DOI: 10.1109/JIOT.2019.2904802
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    The recent standardization of 3GPP Narrowband Internet of Things (NB-IoT) paves the way to support low-power wide-area (LPWA) use cases in cellular networks. NB-IoT design goals are extended coverage, low power and low cost devices, and massive connections. As a new radio access technology, it is necessary to analyze the possibilities NB-IoT provides to support different traffic and coverage needs. In this paper, we propose and validate an NB-IoT energy consumption model. The analytical model is based on a Markov chain. For the validation, an experimental setup is used to measure the energy consumption of two commercial NB-IoT user equipments (UEs) connected to a base station emulator. The evaluation is done considering three test cases. The comparison of the model and measurements is done in terms of the estimated battery lifetime and the latency needed to finish the control plane procedure. The conducted evaluation shows the analytical model performs well, obtaining a maximum relative error of the battery lifetime estimation between the model and the measurements of 21% for an assumed interarrival time (IAT) of 6 min.
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    @ARTICLE{8666720,  author={P. {Andres-Maldonado} and M. {Lauridsen} and P. {Ameigeiras} and J. M. {Lopez-Soler}},  journal={IEEE Internet of Things Journal},   title={Analytical Modeling and Experimental Validation of NB-IoT Device Energy Consumption},   year={2019},  volume={6},  number={3},  pages={5691-5701},  abstract={The recent standardization of 3GPP Narrowband Internet of Things (NB-IoT) paves the way to support low-power wide-area (LPWA) use cases in cellular networks. NB-IoT design goals are extended coverage, low power and low cost devices, and massive connections. As a new radio access technology, it is necessary to analyze the possibilities NB-IoT provides to support different traffic and coverage needs. In this paper, we propose and validate an NB-IoT energy consumption model. The analytical model is based on a Markov chain. For the validation, an experimental setup is used to measure the energy consumption of two commercial NB-IoT user equipments (UEs) connected to a base station emulator. The evaluation is done considering three test cases. The comparison of the model and measurements is done in terms of the estimated battery lifetime and the latency needed to finish the control plane procedure. The conducted evaluation shows the analytical model performs well, obtaining a maximum relative error of the battery lifetime estimation between the model and the measurements of 21% for an assumed interarrival time (IAT) of 6 min.},  keywords={Internet of Things;Energy consumption;Analytical models;Batteries;Narrowband;Downlink;Battery charge measurement;Analytical model;control plane (CP);energy consumption;latency;narrowband Internet of Things (NB-IoT)},  doi={10.1109/JIOT.2019.2904802},  ISSN={2327-4662},  month={June},impact={(IF=9.936, Q1)}, project={5gcity}}
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  7. A LoRaWAN Testbed Design for Supporting Critical Situations: Prototype and Evaluation
    Jorge Navarro-Ortiz, Juan J. Ramos-Munoz, Juan M. Lopez-Soler, Cristina Cervello-Pastor, Marisa Catalan
    Wireless Communications and Mobile Computing, 2019, pp. 1-13, Feb 2019, DOI: 10.1155/2019/1684906. (IF=1.819, Q3)
    "A LoRaWAN Testbed Design for Supporting Critical Situations: Prototype and Evaluation", Jorge Navarro-Ortiz, Juan J. Ramos-Munoz, Juan M. Lopez-Soler, Cristina Cervello-Pastor, Marisa Catalan, Wireless Communications and Mobile Computing, 2019, pp. 1-13, 2019. DOI: 10.1155/2019/1684906
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    The Internet of Things is one of the hottest topics in communications today, with current revenues of \&\#x24;151B, around 7 billion connected devices, and an unprecedented growth expected for next years. A massive number of sensors and actuators are expected to emerge, requiring new wireless technologies that can extend their battery life and can cover large areas. LoRaWAN is one of the most outstanding technologies which fulfill these demands, attracting the attention of both academia and industry. In this paper, the design of a LoRaWAN testbed to support critical situations, such as emergency scenarios or natural disasters, is proposed. This self-healing LoRaWAN network architecture will provide resilience when part of the equipment in the core network may become faulty. This resilience is achieved by virtualizing and properly orchestrating the different network entities. Different options have been designed and implemented as real prototypes. Based on our performance evaluation, we claim that the usage of microservice orchestration with several replicas of the LoRaWAN network entities and a load balancer produces an almost seamless recovery which makes it a proper solution to recover after a system crash caused by any catastrophic event.
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    @Article{Navarro-Ortiz2019,
    author={Navarro-Ortiz, Jorge
    and Ramos-Munoz, Juan J.
    and Lopez-Soler, Juan M.
    and Cervello-Pastor, Cristina
    and Catalan, Marisa},
    title={A {LoRaWAN} Testbed Design for Supporting Critical Situations: Prototype and Evaluation},
    journal={Wireless Communications and Mobile Computing},
    year={2019},
    month={Feb},
    day={21},
    publisher={Hindawi},
    volume={2019},
    pages={1-13},
    abstract={The Internet of Things is one of the hottest topics in communications today, with current revenues of {\&}{\#}x24;151B, around 7 billion connected devices, and an unprecedented growth expected for next years. A massive number of sensors and actuators are expected to emerge, requiring new wireless technologies that can extend their battery life and can cover large areas. {LoRaWAN} is one of the most outstanding technologies which fulfill these demands, attracting the attention of both academia and industry. In this paper, the design of a {LoRaWAN} testbed to support critical situations, such as emergency scenarios or natural disasters, is proposed. This self-healing {LoRaWAN} network architecture will provide resilience when part of the equipment in the core network may become faulty. This resilience is achieved by virtualizing and properly orchestrating the different network entities. Different options have been designed and implemented as real prototypes. Based on our performance evaluation, we claim that the usage of microservice orchestration with several replicas of the {LoRaWAN} network entities and a load balancer produces an almost seamless recovery which makes it a proper solution to recover after a system crash caused by any catastrophic event.},
    issn={1530-8669},
    doi={10.1155/2019/1684906},
    pdf={https://digibug.ugr.es/handle/10481/59786},
    impact={(IF=1.819, Q3)},
    project={5gcity}
    }
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  8. An Analytical Performance Evaluation Framework for NB-IoT
    P. Andres-Maldonado, P. Ameigeiras, J. Prados-Garzon, J. Navarro-Ortiz, J. M. Lopez-Soler
    IEEE Internet of Things Journal, 6 (4), pp. 7232-7240, 4 2019, DOI: 10.1109/JIOT.2019.2915349. (IF=9.936, Q1)
    "An Analytical Performance Evaluation Framework for NB-IoT", P. Andres-Maldonado, P. Ameigeiras, J. Prados-Garzon, J. Navarro-Ortiz, J. M. Lopez-Soler, IEEE Internet of Things Journal, 6 (4), pp. 7232-7240, 2019. DOI: 10.1109/JIOT.2019.2915349
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    @Article{8708311,  author={P. {Andres-Maldonado} and P. {Ameigeiras} and J. {Prados-Garzon} and J. {Navarro-Ortiz} and J. M. {Lopez-Soler}},  journal={{IEEE} Internet of Things Journal},   title={An Analytical Performance Evaluation Framework for NB-IoT}, month=4, year={2019},  volume={6},  number={4},  pages={7232-7240},  doi={10.1109/JIOT.2019.2915349}, impact={(IF=9.936, Q1)}, project={5gcity}, pdf={https://digibug.ugr.es/handle/10481/68246}}
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  9. Integration of LoRaWAN and 4G/5G for the Industrial Internet of Things
    J. Navarro-Ortiz, S. Sendra, P. Ameigeiras, J. M. Lopez-Soler
    IEEE Communications Magazine, 56 (2), pp. 60-67, 2 2018, DOI: 10.1109/MCOM.2018.1700625. (IF=9.27, Q1)
    "Integration of LoRaWAN and 4G/5G for the Industrial Internet of Things", J. Navarro-Ortiz, S. Sendra, P. Ameigeiras, J. M. Lopez-Soler, IEEE Communications Magazine, 56 (2), pp. 60-67, 2018. DOI: 10.1109/MCOM.2018.1700625
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    @Article{8291115,  author={J. {Navarro-Ortiz} and S. {Sendra} and P. {Ameigeiras} and J. M. {Lopez-Soler}},  journal={{IEEE} Communications Magazine},   title={Integration of {LoRaWAN} and 4G/5G for the Industrial Internet of Things},   year={2018}, month=2, volume={56},  number={2},  pages={60-67},  doi={10.1109/MCOM.2018.1700625}, impact={(IF=9.27, Q1)}, project={5gcity}}
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  10. Narrowband IoT Data Transmission Procedures for Massive Machine-Type Communications
    P. Andres-Maldonado, P. Ameigeiras, J. Prados-Garzon, J. Navarro-Ortiz, J. M. Lopez-Soler
    IEEE Network, 31 (6), pp. 8-15, 11 2017, DOI: 10.1109/MNET.2017.1700081. (IF=7.197, Q1)
    "Narrowband IoT Data Transmission Procedures for Massive Machine-Type Communications", P. Andres-Maldonado, P. Ameigeiras, J. Prados-Garzon, J. Navarro-Ortiz, J. M. Lopez-Soler, IEEE Network, 31 (6), pp. 8-15, 2017. DOI: 10.1109/MNET.2017.1700081
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    @Article{8120238,  author={P. {Andres-Maldonado} and P. {Ameigeiras} and J. {Prados-Garzon} and J. {Navarro-Ortiz} and J. M. {Lopez-Soler}},  journal={{IEEE} Network},   title={Narrowband IoT Data Transmission Procedures for Massive Machine-Type Communications},   year={2017},  month=11, volume={31},  number={6},  pages={8-15},  doi={10.1109/MNET.2017.1700081}, impact={(IF=7.197, Q1)}}
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  11. Modeling and Dimensioning of a Virtualized MME for 5G Mobile Networks
    J. Prados-Garzon, J. J. Ramos-Munoz, P. Ameigeiras, P. Andres-Maldonado, J. M. Lopez-Soler
    IEEE Transactions on Vehicular Technology, 66 (5), pp. 4383-4395, May 2017, DOI: 10.1109/TVT.2016.2608942. (IF=4.432, Q1)
    "Modeling and Dimensioning of a Virtualized MME for 5G Mobile Networks", J. Prados-Garzon, J. J. Ramos-Munoz, P. Ameigeiras, P. Andres-Maldonado, J. M. Lopez-Soler, IEEE Transactions on Vehicular Technology, 66 (5), pp. 4383-4395, 2017. DOI: 10.1109/TVT.2016.2608942
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    Network function virtualization is considered one of the key technologies for developing future mobile networks. In this paper, we propose a theoretical framework to evaluate the performance of a Long-Term Evolution (LTE) virtualized mobility management entity (vMME) hosted in a data center. This theoretical framework consists of 1) a queuing network to model the vMME in a data center and 2) analytic expressions to estimate the overall mean system delay and the signaling workload to be processed by the vMME. We validate our mathematical model by simulation. One direct use of the proposed model is vMME dimensioning, i.e., to compute the number of vMME processing instances to provide a target system delay given the number of users in the system. Additionally, the paper includes a scalability analysis of the system. In our study, we consider the billing model and a data center setup of Amazon Elastic Compute Cloud service and estimate the processing time of MME processing instances for different LTE control procedures experimentally. For the considered setup, our results show that the vMME is scalable for signaling workloads up to 37 000 LTE control procedures per second for a target mean system delay of 1 ms. The system design and database performance assumed imposes this limit in the system scalability.
    close
    @ARTICLE{7565650,  author={J. {Prados-Garzon} and J. J. {Ramos-Munoz} and P. {Ameigeiras} and P. {Andres-Maldonado} and J. M. {Lopez-Soler}},  journal={IEEE Transactions on Vehicular Technology},   title={Modeling and Dimensioning of a Virtualized MME for 5G Mobile Networks},   year={2017},  volume={66},  number={5},  pages={4383-4395},  abstract={Network function virtualization is considered one of the key technologies for developing future mobile networks. In this paper, we propose a theoretical framework to evaluate the performance of a Long-Term Evolution (LTE) virtualized mobility management entity (vMME) hosted in a data center. This theoretical framework consists of 1) a queuing network to model the vMME in a data center and 2) analytic expressions to estimate the overall mean system delay and the signaling workload to be processed by the vMME. We validate our mathematical model by simulation. One direct use of the proposed model is vMME dimensioning, i.e., to compute the number of vMME processing instances to provide a target system delay given the number of users in the system. Additionally, the paper includes a scalability analysis of the system. In our study, we consider the billing model and a data center setup of Amazon Elastic Compute Cloud service and estimate the processing time of MME processing instances for different LTE control procedures experimentally. For the considered setup, our results show that the vMME is scalable for signaling workloads up to 37 000 LTE control procedures per second for a target mean system delay of 1 ms. The system design and database performance assumed imposes this limit in the system scalability.},  keywords={Computational modeling;Delays;Scalability;Mathematical model;Mobile radio mobility management;Data models;Evolved packet core (EPC);fifth generation (5G);network functions virtualization (NFV);scalability;virtualization;virtualized mobility management entity (vMME)},  doi={10.1109/TVT.2016.2608942},  ISSN={1939-9359},  month={May},impact={(IF=4.432, Q1)}}
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  12. Interference Bound for Local Channel Allocation
    Jorge Navarro-Ortiz, Pablo Ameigeiras, Juan J. Ramos-Munoz, Jonathan Prados-Garzon, Juan M. Lopez-Soler
    Wireless Personal Communications, 92 (4), pp. 1559-1574, Feb 2017, DOI: 10.1007/s11277-016-3621-1. (IF=1.200, Q4)
    "Interference Bound for Local Channel Allocation", Jorge Navarro-Ortiz, Pablo Ameigeiras, Juan J. Ramos-Munoz, Jonathan Prados-Garzon, Juan M. Lopez-Soler, Wireless Personal Communications, 92 (4), pp. 1559-1574, 2017. DOI: 10.1007/s11277-016-3621-1
    close
    A lower bound of the total co-channel interference is proposed for the channel allocation problem when applied to a reduced set of nodes. The rest of the network nodes remain unaffected. This bound is independent of the particular channel allocation algorithm employed and no assumptions are made about the propagation model or the deployment scenario. Assuming that the bound is tight to the interference generated by the optimal channel allocation, its computation may help, for example, to estimate the minimum set of nodes for which channel allocation performs nearly-optimal while minimizing node reconfigurations. Another example of usage is the estimation of the minimum number of channels required for a given performance. The tightness of the proposed bound is evaluated through simulations, with a difference lower than 1\^A \% in the conducted simulations. In addition, a sample use case\^a\texteuro''adaptive local channel allocation\^a\texteuro''is also provided.
    close
    @Article{Navarro-Ortiz2017,
    author={Navarro-Ortiz, Jorge
    and Ameigeiras, Pablo
    and Ramos-Munoz, Juan J.
    and Prados-Garzon, Jonathan
    and Lopez-Soler, Juan M.},
    title={Interference Bound for Local Channel Allocation},
    journal={Wireless Personal Communications},
    year={2017},
    month={Feb},
    day={01},
    volume={92},
    number={4},
    pages={1559-1574},
    abstract={A lower bound of the total co-channel interference is proposed for the channel allocation problem when applied to a reduced set of nodes. The rest of the network nodes remain unaffected. This bound is independent of the particular channel allocation algorithm employed and no assumptions are made about the propagation model or the deployment scenario. Assuming that the bound is tight to the interference generated by the optimal channel allocation, its computation may help, for example, to estimate the minimum set of nodes for which channel allocation performs nearly-optimal while minimizing node reconfigurations. Another example of usage is the estimation of the minimum number of channels required for a given performance. The tightness of the proposed bound is evaluated through simulations, with a difference lower than 1{\^A} {\%} in the conducted simulations. In addition, a sample use case{\^a}{\texteuro}''adaptive local channel allocation{\^a}{\texteuro}''is also provided.},
    issn={1572-834X},
    doi={10.1007/s11277-016-3621-1},
    impact={(IF=1.200, Q4)}
    }
    close

  13. 3GPP QoS-based scheduling framework for LTE
    Pablo Ameigeiras, Jorge Navarro-Ortiz, Pilar Andres-Maldonado, Juan M. Lopez-Soler, Javier Lorca, Quiliano Perez-Tarrero, Raquel Garcia-Perez
    EURASIP Journal on Wireless Communications and Networking, 2016 (1), pp. 78, Mar 2016, DOI: 10.1186/s13638-016-0565-9. (IF=1.529, Q3)
    "3GPP QoS-based scheduling framework for LTE", Pablo Ameigeiras, Jorge Navarro-Ortiz, Pilar Andres-Maldonado, Juan M. Lopez-Soler, Javier Lorca, Quiliano Perez-Tarrero, Raquel Garcia-Perez, EURASIP Journal on Wireless Communications and Networking, 2016 (1), pp. 78, 2016. DOI: 10.1186/s13638-016-0565-9
    close
    This paper proposes the design of a scheduling framework for the downlink of the Long Term Evolution (LTE) system with the objective of meeting the Quality of Service (QoS) requirements as defined by the QoS architecture of the 3G Partnership Project (3GPP) specifications. We carry out a thorough review of 3GPP specifications analyzing the requirements of the 3GPP QoS architecture. LTE bearers may be associated with a Guaranteed Bit Rate (i.e., GBR bearers) or not (i.e., non-GBR bearers). Additionally, the specifications establish a Packet Delay Budget (PDB) to limit the maximum packet transfer delay. To achieve our goal, we design a channel-aware service discipline for GBR bearers which is able to fulfill not only the GBR but also the PDB. Additionally, we also design an algorithm for prioritizing GBR and non-GBR bearers from different QoS Class Identifiers (QCIs) following 3GPP QoS rules. We compare the proposed framework with two reference schedulers by means of network-level simulations. The results will show the ability of the proposed framework to address the QoS requirements from 3GPP specifications while providing an interesting performance from a spectral efficiency viewpoint.
    close
    @Article{Ameigeiras2016,
    author={Ameigeiras, Pablo
    and Navarro-Ortiz, Jorge
    and Andres-Maldonado, Pilar
    and Lopez-Soler, Juan M.
    and Lorca, Javier
    and Perez-Tarrero, Quiliano
    and Garcia-Perez, Raquel},
    title={3GPP QoS-based scheduling framework for LTE},
    journal={EURASIP Journal on Wireless Communications and Networking},
    year={2016},
    month={Mar},
    day={10},
    volume={2016},
    number={1},
    pages={78},
    abstract={This paper proposes the design of a scheduling framework for the downlink of the Long Term Evolution (LTE) system with the objective of meeting the Quality of Service (QoS) requirements as defined by the QoS architecture of the 3G Partnership Project (3GPP) specifications. We carry out a thorough review of 3GPP specifications analyzing the requirements of the 3GPP QoS architecture. LTE bearers may be associated with a Guaranteed Bit Rate (i.e., GBR bearers) or not (i.e., non-GBR bearers). Additionally, the specifications establish a Packet Delay Budget (PDB) to limit the maximum packet transfer delay. To achieve our goal, we design a channel-aware service discipline for GBR bearers which is able to fulfill not only the GBR but also the PDB. Additionally, we also design an algorithm for prioritizing GBR and non-GBR bearers from different QoS Class Identifiers (QCIs) following 3GPP QoS rules. We compare the proposed framework with two reference schedulers by means of network-level simulations. The results will show the ability of the proposed framework to address the QoS requirements from 3GPP specifications while providing an interesting performance from a spectral efficiency viewpoint.},
    issn={1687-1499},
    doi={10.1186/s13638-016-0565-9},
    impact={(IF=1.529, Q3)}
    }
    close

  14. Virtualized MME Design for IoT Support in 5G Systems
    Pilar Andres-Maldonado, Pablo Ameigeiras, Jonathan Prados-Garzon, Juan Jose Ramos-Munoz, Juan Manuel Lopez-Soler
    Sensors, 16 (8), 2016, DOI: 10.3390/s16081338. (IF=2.677, Q1)
    "Virtualized MME Design for IoT Support in 5G Systems", Pilar Andres-Maldonado, Pablo Ameigeiras, Jonathan Prados-Garzon, Juan Jose Ramos-Munoz, Juan Manuel Lopez-Soler, Sensors, 16 (8), 2016. DOI: 10.3390/s16081338
    close
    Cellular systems are recently being considered an option to provide support to the Internet of Things (IoT). To enable this support, the 3rd Generation Partnership Project (3GPP) has introduced new procedures specifically targeted for cellular IoT. With one of these procedures, the transmissions of small and infrequent data packets from/to the devices are encapsulated in signaling messages and sent through the control plane. However, these transmissions from/to a massive number of devices may imply a major increase of the processing load on the control plane entities of the network and in particular on the Mobility Management Entity (MME). In this paper, we propose two designs of an MME based on Network Function Virtualization (NFV) that aim at facilitating the IoT support. The first proposed design partially separates the processing resources dedicated to each traffic class. The second design includes traffic shaping to control the traffic of each class. We consider three classes: Mobile Broadband (MBB), low latency Machine to Machine communications (lM2M) and delay-tolerant M2M communications. Our proposals enable reducing the processing resources and, therefore, the cost. Additionally, results show that the proposed designs lessen the impact between classes, so they ease the compliance of the delay requirements of MBB and lM2M communications.
    close
    @Article{s16081338,
    AUTHOR = {Andres-Maldonado, Pilar and Ameigeiras, Pablo and Prados-Garzon, Jonathan and Ramos-Munoz, Juan Jose and Lopez-Soler, Juan Manuel},
    TITLE = {Virtualized MME Design for IoT Support in 5G Systems},
    JOURNAL = {Sensors},
    VOLUME = {16},
    YEAR = {2016},
    NUMBER = {8},
    ARTICLE-NUMBER = {1338},
    URL = {https://www.mdpi.com/1424-8220/16/8/1338},
    ISSN = {1424-8220},
    ABSTRACT = {Cellular systems are recently being considered an option to provide support to the Internet of Things (IoT). To enable this support, the 3rd Generation Partnership Project (3GPP) has introduced new procedures specifically targeted for cellular IoT. With one of these procedures, the transmissions of small and infrequent data packets from/to the devices are encapsulated in signaling messages and sent through the control plane. However, these transmissions from/to a massive number of devices may imply a major increase of the processing load on the control plane entities of the network and in particular on the Mobility Management Entity (MME). In this paper, we propose two designs of an MME based on Network Function Virtualization (NFV) that aim at facilitating the IoT support. The first proposed design partially separates the processing resources dedicated to each traffic class. The second design includes traffic shaping to control the traffic of each class. We consider three classes: Mobile Broadband (MBB), low latency Machine to Machine communications (lM2M) and delay-tolerant M2M communications. Our proposals enable reducing the processing resources and, therefore, the cost. Additionally, results show that the proposed designs lessen the impact between classes, so they ease the compliance of the delay requirements of MBB and lM2M communications.},
    DOI = {10.3390/s16081338},impact={(IF=2.677, Q1)}}
    close

  15. Link-level access cloud architecture design based on SDN for 5G networks
    P. Ameigeiras, J. J. Ramos-munoz, L. Schumacher, J. Prados-Garzon, J. Navarro-Ortiz, J. M. Lopez-soler
    IEEE Network, 29 (2), pp. 24-31, 2015, DOI: 10.1109/MNET.2015.7064899. (IF=2.899, Q1)
    "Link-level access cloud architecture design based on SDN for 5G networks", P. Ameigeiras, J. J. Ramos-munoz, L. Schumacher, J. Prados-Garzon, J. Navarro-Ortiz, J. M. Lopez-soler, IEEE Network, 29 (2), pp. 24-31, 2015. DOI: 10.1109/MNET.2015.7064899
    close
    @Article{7064899,  author={P. {Ameigeiras} and J. J. {Ramos-munoz} and L. {Schumacher} and J. {Prados-Garzon} and J. {Navarro-Ortiz} and J. M. {Lopez-soler}},  journal={{IEEE} Network},   title={Link-level access cloud architecture design based on SDN for 5G networks},   year={2015},  volume={29},  number={2},  pages={24-31},  doi={10.1109/MNET.2015.7064899}, impact={(IF=2.899, Q1)}}
    close

  16. Characteristics of mobile youtube traffic
    J. J. Ramos-munoz, J. Prados-Garzon, P. Ameigeiras, J. Navarro-Ortiz, J. M. Lopez-soler
    IEEE Wireless Communications, 21 (1), pp. 18-25, 2014, DOI: 10.1109/MWC.2014.6757893. (IF=6.524, Q1)
    "Characteristics of mobile youtube traffic", J. J. Ramos-munoz, J. Prados-Garzon, P. Ameigeiras, J. Navarro-Ortiz, J. M. Lopez-soler, IEEE Wireless Communications, 21 (1), pp. 18-25, 2014. DOI: 10.1109/MWC.2014.6757893
    close
    @Article{6757893,  author={J. J. {Ramos-munoz} and J. {Prados-Garzon} and P. {Ameigeiras} and J. {Navarro-Ortiz} and J. M. {Lopez-soler}},  journal={{IEEE} Wireless Communications},   title={Characteristics of mobile youtube traffic},   year={2014},  volume={21},  number={1},  pages={18-25},  doi={10.1109/MWC.2014.6757893}, impact={(IF=6.524, Q1)}}
    close

  17. Removing redundant TCP functionalities in wired-cum-wireless networks with IEEE 802.11e HCCA support
    Jorge Navarro-Ortiz, Pablo Ameigeiras, Juan J. Ramos-Munoz, Juan M. Lopez-Soler
    International Journal of Communication Systems, 27 (11), pp. 3352-3367, 2014, DOI: https://doi.org/10.1002/dac.2546. (IF=1.463, Q3)
    "Removing redundant TCP functionalities in wired-cum-wireless networks with IEEE 802.11e HCCA support", Jorge Navarro-Ortiz, Pablo Ameigeiras, Juan J. Ramos-Munoz, Juan M. Lopez-Soler, International Journal of Communication Systems, 27 (11), pp. 3352-3367, 2014. DOI: https://doi.org/10.1002/dac.2546
    close
    SUMMARY The TCP was originally designed for wired networks, assuming transmission errors were negligible. Actually, any acknowledgment time-out unconditionally triggers the congestion control mechanism, even in wireless networks in which this assumption is not valid. Consequently, in wireless networks, TCP performance significantly degrades. To avoid this degradation, this paper proposes the so-called split TCP and UDP. In this approach, the access point splits the TCP connection and uses a customized and lighter transport protocol for the wireless segment. It takes advantage of the IEEE 802.11e Hybrid Coordination Function Controlled Channel Access (HCCA) mechanisms to remove redundant TCP functionalities. Specifically, the HCCA scheduler allows disabling of the congestion control in the wireless link. Similarly, the IEEE 802.11e error control service makes possible to eliminate TCP acknowledgments, therefore reducing the TCP protocol overhead. Finally, the usage of an HCCA scheduler permits providing fairness among the different data flows. The proposed split scheme is evaluated via extensive simulations. Results show that split TCP and User Datagram Protocol outperforms the analyzed TCP flavors—specifically designed for wireless environments—and the split TCP solution, achieving up to 95\% of end-user throughput gain. Furthermore, the proposed solution is TCP friendly because TCP flows are not degraded by the presence of flows by using this approach. Copyright © 2013 John Wiley \& Sons, Ltd.
    close
    @Article{redundanttcp,
    author = {Navarro-Ortiz, Jorge and Ameigeiras, Pablo and Ramos-Munoz, Juan J. and Lopez-Soler, Juan M.},
    title = {Removing redundant TCP functionalities in wired-cum-wireless networks with {IEEE} 802.11e HCCA support},
    journal = {International Journal of Communication Systems},
    volume = {27},
    number = {11},
    pages = {3352-3367},
    keywords = {802.11e, HCCA, performance enhancing proxy, TCP},
    doi = {https://doi.org/10.1002/dac.2546},
    eprint = {https://onlinelibrary.wiley.com/doi/pdf/10.1002/dac.2546},
    abstract = {SUMMARY The TCP was originally designed for wired networks, assuming transmission errors were negligible. Actually, any acknowledgment time-out unconditionally triggers the congestion control mechanism, even in wireless networks in which this assumption is not valid. Consequently, in wireless networks, TCP performance significantly degrades. To avoid this degradation, this paper proposes the so-called split TCP and UDP. In this approach, the access point splits the TCP connection and uses a customized and lighter transport protocol for the wireless segment. It takes advantage of the {IEEE} 802.11e Hybrid Coordination Function Controlled Channel Access (HCCA) mechanisms to remove redundant TCP functionalities. Specifically, the HCCA scheduler allows disabling of the congestion control in the wireless link. Similarly, the {IEEE} 802.11e error control service makes possible to eliminate TCP acknowledgments, therefore reducing the TCP protocol overhead. Finally, the usage of an HCCA scheduler permits providing fairness among the different data flows. The proposed split scheme is evaluated via extensive simulations. Results show that split TCP and User Datagram Protocol outperforms the analyzed TCP flavors—specifically designed for wireless environments—and the split TCP solution, achieving up to 95\% of end-user throughput gain. Furthermore, the proposed solution is TCP friendly because TCP flows are not degraded by the presence of flows by using this approach. Copyright © 2013 John Wiley \& Sons, Ltd.},
    year = {2014},
    impact={(IF=1.463, Q3)}
    }
    close

  18. A QoE-Aware Scheduler for HTTP Progressive Video in OFDMA Systems
    J. Navarro-Ortiz, P. Ameigeiras, J. M. Lopez-Soler, J. Lorca-Hernando, Q. Perez-Tarrero, R. Garcia-Perez
    IEEE Communications Letters, 17 (4), pp. 677-680, 2013, DOI: 10.1109/LCOMM.2013.021913.122716. (IF=1.463, Q2)
    "A QoE-Aware Scheduler for HTTP Progressive Video in OFDMA Systems", J. Navarro-Ortiz, P. Ameigeiras, J. M. Lopez-Soler, J. Lorca-Hernando, Q. Perez-Tarrero, R. Garcia-Perez, IEEE Communications Letters, 17 (4), pp. 677-680, 2013. DOI: 10.1109/LCOMM.2013.021913.122716
    close
    @Article{6511522,  author={J. {Navarro-Ortiz} and P. {Ameigeiras} and J. M. {Lopez-Soler} and J. {Lorca-Hernando} and Q. {Perez-Tarrero} and R. {Garcia-Perez}},  journal={{IEEE} Communications Letters},   title={A QoE-Aware Scheduler for HTTP Progressive Video in OFDMA Systems},   year={2013},  volume={17},  number={4},  pages={677-680},  doi={10.1109/LCOMM.2013.021913.122716}, impact={(IF=1.463, Q2)}}
    close

  19. A content-aware bridging service for publish/subscribe environments
    Jose M. Lopez-Vega, Javier Povedano-Molina, Gerardo Pardo-Castellote, Juan M. Lopez-Soler
    Journal of Systems and Software, 86 (1), pp. 108-124, 2013, DOI: https://doi.org/10.1016/j.jss.2012.07.033. (IF=1.245, Q2)
    "A content-aware bridging service for publish/subscribe environments", Jose M. Lopez-Vega, Javier Povedano-Molina, Gerardo Pardo-Castellote, Juan M. Lopez-Soler, Journal of Systems and Software, 86 (1), pp. 108-124, 2013. DOI: https://doi.org/10.1016/j.jss.2012.07.033
    close
    The OMG DDS (Data Distribution Service) standard specifies a middleware for distributing real-time data using a publish-subscribe data-centric approach. Until now, DDS systems have been restricted to a single and isolated DDS domain, normally deployed within a single multicast-enabled LAN. As systems grow larger, the need to interconnect different DDS domains arises. In this paper, we consider the problem of communicating disjoint data-spaces that may use different schemas to refer to similar information. In this regard, we propose a DDS interconnection service capable of bridging DDS domains as well as adapting between different data schemas. A key benefit of our approach is that is compliant with the latest OMG specifications, thus the proposed service does not require any modifications to DDS applications. The paper identifies the requirements for DDS data-spaces interconnection, presents an architecture that responds to those requirements, and concludes with experimental results gathered on our prototype implementation. We show that the impact of the service on the communications performance is well within the acceptable limits for most real-world uses of DDS (latency overhead is of the order of hundreds of microseconds). Reported results also indicate that our service interconnects remote data-spaces efficiently and reduces the network traffic almost N times, with N being the number of final data subscribers.
    close
    @article{LOPEZVEGA2013108,
    title = {A content-aware bridging service for publish/subscribe environments},
    journal = {Journal of Systems and Software},
    volume = {86},
    number = {1},
    pages = {108-124},
    year = {2013},
    issn = {0164-1212},
    doi = {https://doi.org/10.1016/j.jss.2012.07.033},
    url = {https://www.sciencedirect.com/science/article/pii/S0164121212002142},
    author = {Jose M. Lopez-Vega and Javier Povedano-Molina and Gerardo Pardo-Castellote and Juan M. Lopez-Soler},
    keywords = {Bridging, Interoperability, Data Distribution Service, Middleware, Network communications},
    abstract = {The OMG DDS (Data Distribution Service) standard specifies a middleware for distributing real-time data using a publish-subscribe data-centric approach. Until now, DDS systems have been restricted to a single and isolated DDS domain, normally deployed within a single multicast-enabled LAN. As systems grow larger, the need to interconnect different DDS domains arises. In this paper, we consider the problem of communicating disjoint data-spaces that may use different schemas to refer to similar information. In this regard, we propose a DDS interconnection service capable of bridging DDS domains as well as adapting between different data schemas. A key benefit of our approach is that is compliant with the latest OMG specifications, thus the proposed service does not require any modifications to DDS applications. The paper identifies the requirements for DDS data-spaces interconnection, presents an architecture that responds to those requirements, and concludes with experimental results gathered on our prototype implementation. We show that the impact of the service on the communications performance is well within the acceptable limits for most real-world uses of DDS (latency overhead is of the order of hundreds of microseconds). Reported results also indicate that our service interconnects remote data-spaces efficiently and reduces the network traffic almost N times, with N being the number of final data subscribers.}, impact={(IF=1.245, Q2)}}
    close

  20. DARGOS: A highly adaptable and scalable monitoring architecture for multi-tenant Clouds
    Javier Povedano-Molina, Jose M. Lopez-Vega, Juan M. Lopez-Soler, Antonio Corradi, Luca Foschini
    Future Generation Computer Systems, 29 (8), pp. 2041-2056, 2013, DOI: https://doi.org/10.1016/j.future.2013.04.022. (IF=2.639, Q1)
    "DARGOS: A highly adaptable and scalable monitoring architecture for multi-tenant Clouds", Javier Povedano-Molina, Jose M. Lopez-Vega, Juan M. Lopez-Soler, Antonio Corradi, Luca Foschini, Future Generation Computer Systems, 29 (8), pp. 2041-2056, 2013. DOI: https://doi.org/10.1016/j.future.2013.04.022
    close
    One of the most important features in Cloud environments is to know the status and the availability of the physical resources and services present in the current infrastructure. A full knowledge and control of the current status of those resources enables Cloud administrators to design better Cloud provisioning strategies and to avoid SLA violations. However, it is not easy to manage such information in a reliable and scalable way, especially when we consider Cloud environments used and shared by several tenants and when we need to harmonize their different monitoring needs at different Cloud software stack layers. To cope with these issues, we propose Distributed Architecture for Resource manaGement and mOnitoring in cloudS (DARGOS), a completely distributed and highly efficient Cloud monitoring architecture to disseminate resource monitoring information. DARGOS ensures an accurate measurement of physical and virtual resources in the Cloud keeping at the same time a low overhead. In addition, DARGOS is flexible and adaptable and allows defining and monitoring new metrics easily. The proposed monitoring architecture and related tools have been integrated into a real Cloud deployment based on the OpenStack platform: they are openly available for the research community and include a Web-based customizable Cloud monitoring console. We report experimental results to assess our architecture and quantitatively compare it with a selection of other Cloud monitoring systems similar to ours showing that DARGOS introduces a very limited and scalable monitoring overhead.
    close
    @article{POVEDANOMOLINA20132041,
    title = {DARGOS: A highly adaptable and scalable monitoring architecture for multi-tenant Clouds},
    journal = {Future Generation Computer Systems},
    volume = {29},
    number = {8},
    pages = {2041-2056},
    year = {2013},
    note = {Including Special sections: Advanced Cloud Monitoring Systems & The fourth IEEE International Conference on e-Science 2011 — e-Science Applications and Tools & Cluster, Grid, and Cloud Computing},
    issn = {0167-739X},
    doi = {https://doi.org/10.1016/j.future.2013.04.022},
    url = {https://www.sciencedirect.com/science/article/pii/S0167739X13000824},
    author = {Javier Povedano-Molina and Jose M. Lopez-Vega and Juan M. Lopez-Soler and Antonio Corradi and Luca Foschini},
    keywords = {Cloud monitoring, Cloud management, Data-centric communications, Publish–subscribe, DDS, Distributed Cloud management},
    abstract = {One of the most important features in Cloud environments is to know the status and the availability of the physical resources and services present in the current infrastructure. A full knowledge and control of the current status of those resources enables Cloud administrators to design better Cloud provisioning strategies and to avoid SLA violations. However, it is not easy to manage such information in a reliable and scalable way, especially when we consider Cloud environments used and shared by several tenants and when we need to harmonize their different monitoring needs at different Cloud software stack layers. To cope with these issues, we propose Distributed Architecture for Resource manaGement and mOnitoring in cloudS (DARGOS), a completely distributed and highly efficient Cloud monitoring architecture to disseminate resource monitoring information. DARGOS ensures an accurate measurement of physical and virtual resources in the Cloud keeping at the same time a low overhead. In addition, DARGOS is flexible and adaptable and allows defining and monitoring new metrics easily. The proposed monitoring architecture and related tools have been integrated into a real Cloud deployment based on the OpenStack platform: they are openly available for the research community and include a Web-based customizable Cloud monitoring console. We report experimental results to assess our architecture and quantitatively compare it with a selection of other Cloud monitoring systems similar to ours showing that DARGOS introduces a very limited and scalable monitoring overhead.},
    impact={(IF=2.639, Q1)}}
    close

  21. RELOAD extension for data discovery and transfer in data-centric publish/subscribe environments
    Jose M. Lopez-Vega, Gonzalo Camarillo, Javier Povedano-Molina, Juan M. Lopez-Soler
    Computer Standards & Interfaces, 36 (1), pp. 110-121, 2013, DOI: https://doi.org/10.1016/j.csi.2013.06.006. (IF=1,17,Q2)
    "RELOAD extension for data discovery and transfer in data-centric publish/subscribe environments", Jose M. Lopez-Vega, Gonzalo Camarillo, Javier Povedano-Molina, Juan M. Lopez-Soler, Computer Standards & Interfaces, 36 (1), pp. 110-121, 2013. DOI: https://doi.org/10.1016/j.csi.2013.06.006
    close
    Data-Centric Publish–Subscribe (DCPS) is an architectural and communication paradigm where applications exchange data-content through a common data-space using publish-subscribe interactions. Due to its focus on data-content, DCPS is especially suitable for deploying IoT systems. However, some problems must be solved to support large deployments. In this paper we define a novel extension to the IETF REsource LOcation And Discovery (RELOAD) protocol specification for providing content discovery and transfer in big scale IoT deployments. We have conducted a set of experiments over multiple simulated networks of 500 to 10,000 nodes that demonstrate the viability, scalability, and robustness of our proposal.
    close
    @article{LOPEZVEGA2013110,
    title = {RELOAD extension for data discovery and transfer in data-centric publish/subscribe environments},
    journal = {Computer Standards & Interfaces},
    volume = {36},
    number = {1},
    pages = {110-121},
    year = {2013},
    issn = {0920-5489},
    doi = {https://doi.org/10.1016/j.csi.2013.06.006},
    url = {https://www.sciencedirect.com/science/article/pii/S0920548913000743},
    author = {Jose M. Lopez-Vega and Gonzalo Camarillo and Javier Povedano-Molina and Juan M. Lopez-Soler},
    keywords = {Data-centric, Publish–subscribe, Discovery, Rendezvous, Reload, DDS},
    abstract = {Data-Centric Publish–Subscribe (DCPS) is an architectural and communication paradigm where applications exchange data-content through a common data-space using publish-subscribe interactions. Due to its focus on data-content, DCPS is especially suitable for deploying IoT systems. However, some problems must be solved to support large deployments. In this paper we define a novel extension to the IETF REsource LOcation And Discovery (RELOAD) protocol specification for providing content discovery and transfer in big scale IoT deployments. We have conducted a set of experiments over multiple simulated networks of 500 to 10,000 nodes that demonstrate the viability, scalability, and robustness of our proposal.},impact={(IF=1,17,Q2)}}
    close

  22. Traffic models impact on OFDMA scheduling design
    Pablo Ameigeiras, Yuanye Wang, Jorge Navarro-Ortiz, Preben E. Mogensen, Juan M. Lopez-Soler
    EURASIP Journal on Wireless Communications and Networking, 2012 (1), pp. 61, Feb 2012, DOI: 10.1186/1687-1499-2012-61. (IF=0.540, Q3)
    "Traffic models impact on OFDMA scheduling design", Pablo Ameigeiras, Yuanye Wang, Jorge Navarro-Ortiz, Preben E. Mogensen, Juan M. Lopez-Soler, EURASIP Journal on Wireless Communications and Networking, 2012 (1), pp. 61, 2012. DOI: 10.1186/1687-1499-2012-61
    close
    This article studies the impact on the design of scheduling algorithms for Orthogonal Frequency Division Multiple Access (OFDMA) systems of two traffic models described in the evaluation methodology proposals from standardization bodies: the full buffer and the finite buffer traffic models. The analysis concentrates on utility-based scheduling with an \^I\textpm-fair utility function for Non-Real Time (NRT) services. The results show that a gradient scheduling algorithm is able to maximize the aggregate utility over all the users when the less realistic full buffer model is adopted; but not when the finite buffer model is applied. The results also show that with the full buffer model a gradient scheduler exhibits a trade-off between average user throughput and the user throughput at 5\% outage, but it does not when the more realistic finite buffer is used. Therefore, it is concluded that designs of scheduling algorithms for NRT services for OFDMA systems carried out under the full buffer model assumption may fail to provide the desired performance benefits in realistic scenarios. Based on the results presented, a recommendation on scheduling design is provided.
    close
    @Article{Ameigeiras2012,
    author={Ameigeiras, Pablo
    and Wang, Yuanye
    and Navarro-Ortiz, Jorge
    and Mogensen, Preben E.
    and Lopez-Soler, Juan M.},
    title={Traffic models impact on OFDMA scheduling design},
    journal={EURASIP Journal on Wireless Communications and Networking},
    year={2012},
    month={Feb},
    day={24},
    volume={2012},
    number={1},
    pages={61},
    abstract={This article studies the impact on the design of scheduling algorithms for Orthogonal Frequency Division Multiple Access (OFDMA) systems of two traffic models described in the evaluation methodology proposals from standardization bodies: the full buffer and the finite buffer traffic models. The analysis concentrates on utility-based scheduling with an {\^I}{\textpm}-fair utility function for Non-Real Time (NRT) services. The results show that a gradient scheduling algorithm is able to maximize the aggregate utility over all the users when the less realistic full buffer model is adopted; but not when the finite buffer model is applied. The results also show that with the full buffer model a gradient scheduler exhibits a trade-off between average user throughput and the user throughput at 5{\%} outage, but it does not when the more realistic finite buffer is used. Therefore, it is concluded that designs of scheduling algorithms for NRT services for OFDMA systems carried out under the full buffer model assumption may fail to provide the desired performance benefits in realistic scenarios. Based on the results presented, a recommendation on scheduling design is provided.},
    issn={1687-1499},
    doi={10.1186/1687-1499-2012-61},
    impact={(IF=0.540, Q3)}
    }
    close

  23. Analysis and modelling of YouTube traffic
    Pablo Ameigeiras, Juan J. Ramos-Munoz, Jorge Navarro-Ortiz, J.M. Lopez-Soler
    Transactions on Emerging Telecommunications Technologies, 23 (4), pp. 360-377, 2012, DOI: https://doi.org/10.1002/ett.2546. (IF=1.05, Q4)
    "Analysis and modelling of YouTube traffic", Pablo Ameigeiras, Juan J. Ramos-Munoz, Jorge Navarro-Ortiz, J.M. Lopez-Soler, Transactions on Emerging Telecommunications Technologies, 23 (4), pp. 360-377, 2012. DOI: https://doi.org/10.1002/ett.2546
    close
    ABSTRACT YouTube currently accounts for a significant percentage of the Internet's global traffic. Hence, understanding the characteristics of the YouTube traffic generation pattern can provide a significant advantage in predicting user video quality and in enhancing network design. In this paper, we present a characterisation of the traffic generated by YouTube when accessed from a regular PC. On the basis of this characterisation, a YouTube server traffic generation model is proposed, which, for example, can be easily implemented in simulation tools. The derived characterisation and model are based on experimental evaluations of traffic generated by the application layer of YouTube servers. A YouTube server commences the download with an initial burst and later throttles down the generation rate. If the available bandwidth is reduced (e.g. in the presence of network congestion), the server behaves as if the data excess that cannot be transmitted because of the reduced bandwidth were accumulated at a server's buffer, which is later drained if the bandwidth availability is recovered. As we will show, the video clip encoding rate plays a relevant role in determining the traffic generation rate, and therefore, a cumulative density function for the most viewed video clips will be presented. The proposed traffic generation model was implemented in a YouTube emulation server, and the generated synthetic traffic traces were compared with downloads from the original YouTube server. The results show that the relative error between downloads from the emulation server and the original server does not exceed 6\% for the 90\% of the considered videos. Copyright © 2012 John Wiley \& Sons, Ltd.
    close
    @Article{analysisyoutube,
    author = {Ameigeiras, Pablo and Ramos-Munoz, Juan J. and Navarro-Ortiz, Jorge and Lopez-Soler, J.M.},
    title = {Analysis and modelling of YouTube traffic},
    journal = {Transactions on Emerging Telecommunications Technologies},
    volume = {23},
    number = {4},
    pages = {360-377},
    keywords = {YouTube, YouTube traffic generation, progressive download, YouTube data rate, YouTube application flow control, progressive download traffic generation},
    doi = {https://doi.org/10.1002/ett.2546},
    eprint = {https://onlinelibrary.wiley.com/doi/pdf/10.1002/ett.2546},
    abstract = {ABSTRACT YouTube currently accounts for a significant percentage of the Internet's global traffic. Hence, understanding the characteristics of the YouTube traffic generation pattern can provide a significant advantage in predicting user video quality and in enhancing network design. In this paper, we present a characterisation of the traffic generated by YouTube when accessed from a regular PC. On the basis of this characterisation, a YouTube server traffic generation model is proposed, which, for example, can be easily implemented in simulation tools. The derived characterisation and model are based on experimental evaluations of traffic generated by the application layer of YouTube servers. A YouTube server commences the download with an initial burst and later throttles down the generation rate. If the available bandwidth is reduced (e.g. in the presence of network congestion), the server behaves as if the data excess that cannot be transmitted because of the reduced bandwidth were accumulated at a server's buffer, which is later drained if the bandwidth availability is recovered. As we will show, the video clip encoding rate plays a relevant role in determining the traffic generation rate, and therefore, a cumulative density function for the most viewed video clips will be presented. The proposed traffic generation model was implemented in a YouTube emulation server, and the generated synthetic traffic traces were compared with downloads from the original YouTube server. The results show that the relative error between downloads from the emulation server and the original server does not exceed 6\% for the 90\% of the considered videos. Copyright © 2012 John Wiley \& Sons, Ltd.},
    year = {2012},
    impact={(IF=1.05, Q4)}
    }
    close

  24. A Simple Model for Predicting the Number and Duration of Rebuffering Events for YouTube Flows
    P. Ameigeiras, A. Azcona-Rivas, J. Navarro-Ortiz, J. J. Ramos-Munoz, J. M. Lopez-Soler
    IEEE Communications Letters, 16 (2), pp. 278-280, 2012, DOI: 10.1109/LCOMM.2011.121311.111682. (IF=1.16, Q2)
    "A Simple Model for Predicting the Number and Duration of Rebuffering Events for YouTube Flows", P. Ameigeiras, A. Azcona-Rivas, J. Navarro-Ortiz, J. J. Ramos-Munoz, J. M. Lopez-Soler, IEEE Communications Letters, 16 (2), pp. 278-280, 2012. DOI: 10.1109/LCOMM.2011.121311.111682
    close
    @Article{6109192,  author={P. {Ameigeiras} and A. {Azcona-Rivas} and J. {Navarro-Ortiz} and J. J. {Ramos-Munoz} and J. M. {Lopez-Soler}},  journal={{IEEE} Communications Letters},   title={A Simple Model for Predicting the Number and Duration of Rebuffering Events for YouTube Flows},   year={2012},  volume={16},  number={2},  pages={278-280},  doi={10.1109/LCOMM.2011.121311.111682}, impact={(IF=1.16, Q2)}}
    close

  25. User-Level Quality Assessment of a Delay-Aware Packet Dropping Scheme for VoIP
    Erika Patricia Alvarez-Flores, Juan Jose Ramos-Munoz, Jorge Navarro-Ortiz, Pablo Ameigeiras, Juan Manuel Lopez-Soler
    Network Protocols and Algorithms, 3 (3), pp. 38-66, December 2011, DOI: 10.5296/npa.v3i3.1113.
    "User-Level Quality Assessment of a Delay-Aware Packet Dropping Scheme for VoIP", Erika Patricia Alvarez-Flores, Juan Jose Ramos-Munoz, Jorge Navarro-Ortiz, Pablo Ameigeiras, Juan Manuel Lopez-Soler, Network Protocols and Algorithms, 3 (3), pp. 38-66, 2011. DOI: 10.5296/npa.v3i3.1113
    close
    To deal with congestion control in internet protocol (IP) networks, different active queue management schemes have been successfully proposed. However, many of these schemes do not take into consideration the particular Voice over Internet Protocol (VoIP) requirements, thereby potentially penalizing this traffic. In this paper, we propose and evaluate a dropping packet selection algorithm for queue management schemes. This algorithm, called Drop-SwD, protects VoIP traffic without affecting other User Datagram Protocol (UDP) and Transmission Control Protocol (TCP) traffic. Additionally, to preserve the quality of the VoIP service, the proposed algorithm selects the lowest quality packets (with less impact on the subjective quality) to be dropped.The application of the algorithm in different active queue management schemes is evaluated using objective and subjective quality metrics and intelligibility metrics as well. As a result, we show that Drop-SwD improves the final quality of the voice packets’ flow, without degrading the performance of other traffic class, with respect to the packet dropping schemes of reference.
    close
    @Article{alvarezflores2011,
    	title = {User-{Level} {Quality} {Assessment} of a {Delay}-{Aware} {Packet} {Dropping} {Scheme} for {VoIP}},
    	volume = {3},
    	copyright = {Copyright (c)},
    	issn = {1943-3581},
    	doi = {10.5296/npa.v3i3.1113},
    	abstract = {To deal with congestion control in internet protocol (IP) networks, different active queue management schemes have been successfully proposed. However, many of these schemes do not take into consideration the particular Voice over Internet Protocol (VoIP) requirements, thereby potentially penalizing this traffic. In this paper, we propose and evaluate a dropping packet selection algorithm for queue management schemes. This algorithm, called Drop-SwD, protects VoIP traffic without affecting other User Datagram Protocol (UDP) and Transmission Control Protocol (TCP) traffic. Additionally, to preserve the quality of the VoIP service, the proposed algorithm selects the lowest quality packets (with less impact on the subjective quality) to be dropped.The application of the algorithm in different active queue management schemes is evaluated using objective and subjective quality metrics and intelligibility metrics as well. As a result, we show that Drop-SwD improves the final quality of the voice packets’ flow, without degrading the performance of other traffic class, with respect to the packet dropping schemes of reference.},
    	language = {en},
    	number = {3},
    	urldate = {2021-03-21},
    	journal = {Network Protocols and Algorithms},
    	author = {Alvarez-Flores, Erika Patricia and Ramos-Munoz, Juan Jose and Navarro-Ortiz, Jorge and Ameigeiras, Pablo and Lopez-Soler, Juan Manuel},
    	month = December,
    	year = {2011},
    	keywords = {AQM, Dropping, QoE, QoS, Service Differentiation, VoIP.},
    	pages = {38-66},
    }
    close

  26. Selective Packet Dropping for VoIP and TCP Flows
    Erika P. Álvarez Flores, Juan J. Ramos-Muñoz, Pablo Ameigeiras, Juan M. Lopez-Soler
    Telecommunication Systems Journal, 46 (1), 2011, DOI: https://doi.org/10.1007/s11235-009-9252-z. (IF=0.67, Q3)
    "Selective Packet Dropping for VoIP and TCP Flows", Erika P. Álvarez Flores, Juan J. Ramos-Muñoz, Pablo Ameigeiras, Juan M. Lopez-Soler, Telecommunication Systems Journal, 46 (1), 2011. DOI: https://doi.org/10.1007/s11235-009-9252-z
    close
    The adoption of the IP protocol for serving diverse applications arises the need for mechanisms to prevent network congestion in scenarios with different traffic
    types (responsive and unresponsive) sharing limited network
    resources. To deal with this issue, a number of algorithms
    for active queue management (AQM) have been proposed.
    However, most of them do not observe the traffic type and
    usually disregard this knowledge. In this way, the provided
    service could not comply with the distinctive requirements
    of the different type of traffic, such as VoIP services, which
    demand bounded packet latency and loss rate.
    This paper proposes a new approach to be applied for
    preventing network congestion in AQM routers. Our scheme
    includes a procedure for selecting the packet to be dropped
    that improves the fairness among different classes of flows.
    We evaluate the use of this approach on distinct AQM
    schemes in scenarios with different degrees of UDP and
    TCP traffic mix. Objective and subjective performance measurements are reported. The experimental evaluation indicates that our approach improves the fairness among different traffic classes without using any packet scheduler. In fact, it also improves the VoIP traffic performance in terms of packet dropping probability, MOS (Mean Opinion Score) and intelligibility. We also show that our approach has
    no negative impact on the packet delay. Moreover, it is not achieved at the expense of TCP responsive traffic.
    close
    @article{ERIKA2011,
    title = {Selective Packet Dropping for VoIP and TCP Flows},
    journal = {Telecommunication Systems Journal},
    volume = {46},
    number = {1},
    year = {2011},
    issn = {1018-4864},
    doi = {https://doi.org/10.1007/s11235-009-9252-z},
    url = {https://link.springer.com/content/pdf/10.1007%2Fs11235-009-9252-z.pdf},
    author = {Erika P. Álvarez Flores and Juan J. Ramos-Muñoz and Pablo Ameigeiras and Juan M. Lopez-Soler},
    keywords = {Active queue management, RED, VoIP, TCP-friendly, Fairness, Traffic mix},
    abstract = {The adoption of the IP protocol for serving diverse applications arises the need for mechanisms to prevent network congestion in scenarios with different traffic
    types (responsive and unresponsive) sharing limited network
    resources. To deal with this issue, a number of algorithms
    for active queue management (AQM) have been proposed.
    However, most of them do not observe the traffic type and
    usually disregard this knowledge. In this way, the provided
    service could not comply with the distinctive requirements
    of the different type of traffic, such as VoIP services, which
    demand bounded packet latency and loss rate.
    This paper proposes a new approach to be applied for
    preventing network congestion in AQM routers. Our scheme
    includes a procedure for selecting the packet to be dropped
    that improves the fairness among different classes of flows.
    We evaluate the use of this approach on distinct AQM
    schemes in scenarios with different degrees of UDP and
    TCP traffic mix. Objective and subjective performance measurements are reported. The experimental evaluation indicates that our approach improves the fairness among different traffic classes without using any packet scheduler. In fact, it also improves the VoIP traffic performance in terms of packet dropping probability, MOS (Mean Opinion Score) and intelligibility. We also show that our approach has
    no negative impact on the packet delay. Moreover, it is not achieved at the expense of TCP responsive traffic.}, impact={(IF=0.67, Q3)}}
    close

  27. Bloom filter-based discovery protocol for DDS middleware
    Javier Sanchez-Monedero, Javier Povedano-Molina, Jose M. Lopez-Vega, Juan M. Lopez-Soler
    Journal of Parallel and Distributed Computing, 71 (10), pp. 1305-1317, 2011, DOI: https://doi.org/10.1016/j.jpdc.2011.05.001. (IF=1.08, Q2)
    "Bloom filter-based discovery protocol for DDS middleware", Javier Sanchez-Monedero, Javier Povedano-Molina, Jose M. Lopez-Vega, Juan M. Lopez-Soler, Journal of Parallel and Distributed Computing, 71 (10), pp. 1305-1317, 2011. DOI: https://doi.org/10.1016/j.jpdc.2011.05.001
    close
    The Data Distribution Service (DDS) middleware has recently been standardized by the OMG. Prior to data communication, a discovery protocol had to locate and obtain remote DDS entities and their attributes. Specifically, DDS discovery matches the DataWriters (DWs) and DataReaders (DRs) entities (Endpoints) situated in different network nodes. DDS specification does not specify how this discovery is translated “into the wire”. To provide interoperability and transparency between different DDS implementations, the OMG has standardized the DDS Interoperability Wire Protocol (DDS-RTPS). Any compliant DDS-RTPS implementation must support at least the SDP (Simple Discovery Protocol). The SDP works in relatively small or medium networks but it may not scale as the number of DDS Endpoints increases. This paper addresses the design and evaluation of an SDP alternative–which uses Bloom Filters (BF)–that increases DDS scalability. BFs use Hash functions for space-efficient probabilistic data set representation. We provide both analytical and experimental studies. Results show that our approach can improve the discovery process (in terms of network load and node resource consumption), especially in those scenarios with large Endpoint per Participant ratios.
    close
    @article{SANCHEZMONEDERO20111305,
    title = {Bloom filter-based discovery protocol for DDS middleware},
    journal = {Journal of Parallel and Distributed Computing},
    volume = {71},
    number = {10},
    pages = {1305-1317},
    year = {2011},
    issn = {0743-7315},
    doi = {https://doi.org/10.1016/j.jpdc.2011.05.001},
    url = {https://www.sciencedirect.com/science/article/pii/S0743731511000876},
    author = {Javier Sanchez-Monedero and Javier Povedano-Molina and Jose M. Lopez-Vega and Juan M. Lopez-Soler},
    keywords = {DDS, Data Distribution Service, Discovery, Middleware, Bloom filter, Peer-to-peer, RTPS},
    abstract = {The Data Distribution Service (DDS) middleware has recently been standardized by the OMG. Prior to data communication, a discovery protocol had to locate and obtain remote DDS entities and their attributes. Specifically, DDS discovery matches the DataWriters (DWs) and DataReaders (DRs) entities (Endpoints) situated in different network nodes. DDS specification does not specify how this discovery is translated “into the wire”. To provide interoperability and transparency between different DDS implementations, the OMG has standardized the DDS Interoperability Wire Protocol (DDS-RTPS). Any compliant DDS-RTPS implementation must support at least the SDP (Simple Discovery Protocol). The SDP works in relatively small or medium networks but it may not scale as the number of DDS Endpoints increases. This paper addresses the design and evaluation of an SDP alternative–which uses Bloom Filters (BF)–that increases DDS scalability. BFs use Hash functions for space-efficient probabilistic data set representation. We provide both analytical and experimental studies. Results show that our approach can improve the discovery process (in terms of network load and node resource consumption), especially in those scenarios with large Endpoint per Participant ratios.}, impact={(IF=1.08, Q2)}}
    close

  28. QoE oriented cross-layer design of a resource allocation algorithm in beyond 3G systems
    Pablo Ameigeiras, Juan J. Ramos-Munoz, Jorge Navarro-Ortiz, Preben Mogensen, Juan M. Lopez-Soler
    Computer Communications, 33 (5), pp. 571-582, 2010, DOI: https://doi.org/10.1016/j.comcom.2009.10.016. (IF=0.816, Q2)
    "QoE oriented cross-layer design of a resource allocation algorithm in beyond 3G systems", Pablo Ameigeiras, Juan J. Ramos-Munoz, Jorge Navarro-Ortiz, Preben Mogensen, Juan M. Lopez-Soler, Computer Communications, 33 (5), pp. 571-582, 2010. DOI: https://doi.org/10.1016/j.comcom.2009.10.016
    close
    The provision of high speed access to Internet and IP-based services is one of the main goals of beyond 3G (B3G) wireless systems. These systems will benefit from cross-layer protocol designs that will introduce interactions between different layers to obtain performance gains. The majority of the research in the field of cross-layer in B3G systems aims at improving quality of service (QoS) system centric metrics such as spectral efficiency, service latency, delay variation (jitter), etc. However, minor attention has been paid to the satisfaction of the subjective quality requirements from human users. With the goal of incorporating the subjective human perception into the cross-layer design of B3G systems, this work carries out an experimental survey of the sensitivity of the user subjective quality to the service response time for the Web browsing application. From the experimental results, a mapping from service response time and user data rate (provided by the wireless link) to mean opinion score (MOS) is derived. The presented results will show that the Web page size plays an important role in the mapping function. The derived mapping function is incorporated into a radio resource allocation algorithm for orthogonal frequency division multiple access (OFDMA) systems. This incorporation is carried out maximizing the aggregate utility over all the users in the cell. Its performance has been compared to that of the multicarrier proportional fair (MPF) under heavy load conditions with a 3G LTE simulator. The results have shown that the proposed methodology can provide an interesting enhancement of the user experienced quality compared to the MPF algorithm.
    close
    @Article{AMEIGEIRAS2010571,
    title = {QoE oriented cross-layer design of a resource allocation algorithm in beyond 3G systems},
    journal = {Computer Communications},
    volume = {33},
    number = {5},
    pages = {571-582},
    year = {2010},
    issn = {0140-3664},
    doi = {https://doi.org/10.1016/j.comcom.2009.10.016},
    author = {Pablo Ameigeiras and Juan J. Ramos-Munoz and Jorge Navarro-Ortiz and Preben Mogensen and Juan M. Lopez-Soler},
    keywords = {HTTP subjective quality survey, Quality of experience (QoE), Cross-layer design, Utility function, Long term evolution},
    abstract = {The provision of high speed access to Internet and IP-based services is one of the main goals of beyond 3G (B3G) wireless systems. These systems will benefit from cross-layer protocol designs that will introduce interactions between different layers to obtain performance gains. The majority of the research in the field of cross-layer in B3G systems aims at improving quality of service (QoS) system centric metrics such as spectral efficiency, service latency, delay variation (jitter), etc. However, minor attention has been paid to the satisfaction of the subjective quality requirements from human users. With the goal of incorporating the subjective human perception into the cross-layer design of B3G systems, this work carries out an experimental survey of the sensitivity of the user subjective quality to the service response time for the Web browsing application. From the experimental results, a mapping from service response time and user data rate (provided by the wireless link) to mean opinion score (MOS) is derived. The presented results will show that the Web page size plays an important role in the mapping function. The derived mapping function is incorporated into a radio resource allocation algorithm for orthogonal frequency division multiple access (OFDMA) systems. This incorporation is carried out maximizing the aggregate utility over all the users in the cell. Its performance has been compared to that of the multicarrier proportional fair (MPF) under heavy load conditions with a 3G LTE simulator. The results have shown that the proposed methodology can provide an interesting enhancement of the user experienced quality compared to the MPF algorithm.},
    impact={(IF=0.816, Q2)}
    }
    close

  29. Intelligibility Evaluation of a VoIP Multi-flow Block Interleaver
    Ramos-Munoz Juan J., Gómez Ángel, Lopez-Soler Juan M.
    Active and Programmable Networks. IWAN 2005. Lecture Notes in Computer Science, 4388, 2009, DOI: https://doi.org/10.1007/978-3-642-00972-3_18.
    "Intelligibility Evaluation of a VoIP Multi-flow Block Interleaver", Ramos-Munoz Juan J., Gómez Ángel, Lopez-Soler Juan M., Active and Programmable Networks. IWAN 2005. Lecture Notes in Computer Science, 4388, 2009. DOI: https://doi.org/10.1007/978-3-642-00972-3_18
    close
    This work contributes to demonstrate what perceptual benefits can be expected by adding some processing capabilities to the network nodes for the class of interactive audio streaming applications. In particular, we propose a new voice stream multi-flow block interleaver and we show that it provides an intelligibility performance very close to the reference end-to-end interleaver, even under conditions where the end-to-end interleaving is unfeasible.
    close
    @article{RAMOS2009,
    title = {Intelligibility Evaluation of a VoIP Multi-flow Block Interleaver},
    journal = {Active and Programmable Networks. IWAN 2005. Lecture Notes in Computer Science},
    volume = {4388},
    year = {2009},
    doi = {https://doi.org/10.1007/978-3-642-00972-3_18},
    url = {https://link.springer.com/chapter/10.1007/978-3-642-00972-3_18},
    author = {Ramos-Munoz Juan J. and Gómez Ángel and Lopez-Soler Juan M.},
    keywords = {VoIP subjective evaluation, interleaving, speech recognition},
    abstract = {This work contributes to demonstrate what perceptual benefits can be expected by adding some processing capabilities to the network nodes for the class of interactive audio streaming applications. In particular, we propose a new voice stream multi-flow block interleaver and we show that it provides an intelligibility performance very close to the reference end-to-end interleaver, even under conditions where the end-to-end interleaving is unfeasible.}}
    close

  30. An 802.11e HCCA scheduler with an end-to-end quality aware territory method
    Jorge Navarro-Ortiz, Pablo Ameigeiras, Juan J. Ramos-Munoz, Juan M. Lopez-Soler
    Computer Communications, 32 (11), pp. 1281-1297, 2009, DOI: https://doi.org/10.1016/j.comcom.2008.12.014. (IF=0.933, Q2)
    "An 802.11e HCCA scheduler with an end-to-end quality aware territory method", Jorge Navarro-Ortiz, Pablo Ameigeiras, Juan J. Ramos-Munoz, Juan M. Lopez-Soler, Computer Communications, 32 (11), pp. 1281-1297, 2009. DOI: https://doi.org/10.1016/j.comcom.2008.12.014
    close
    In this paper we present a solution for the IEEE 802.11e HCCA (Hybrid coordination function Controlled Channel Access) mechanism which aims both at supporting strict real-time traffic requirements and, simultaneously, at handling TCP applications efficiently. Our proposal combines a packet scheduler and a dynamic resource allocation algorithm. The scheduling discipline is based on the Monolithic Shaper-Scheduler, which is a modification of a General Processor Sharing (GPS) related scheduler. It supports minimum-bandwidth and delay guarantees and, at the same time, it achieves the optimal latency of all the GPS-related schedulers. In addition, our innovative resource allocation procedure, called the territory method, aims at prioritizing real time services and at improving the performance of TCP applications. For this purpose, it splits the wireless channel capacity (in terms of transmission opportunities) into different territories for the different types of traffic, taking into account the end-to-end network dynamics. In order to give support to the desired applications, we consider the following traffic classes: conversational, streaming, interactive and best-effort. The so called territories shrink or expand depending on the current quality experienced by the corresponding traffic class. We evaluated the performance of our solution through extensive simulations in a heterogeneous wired-cum-wireless scenario under different traffic conditions. Additionally, we compare our proposal to other HCCA scheduling algorithms, the HCCA reference scheduler and Fair Hybrid Coordination Function (FHCF). The results show that the combination of the MSS and the territory method obtains higher system capacity for VoIP traffic (up to 32 users) in the simulated scenario, compared to FHCF and the HCCA reference scheduler (13 users). In addition, the MSS with the territory method also improves the throughput of TCP sources (one FTP application achieves between 6.1 Mbps without VoIP traffic and 2.1 Mbps with 20 VoIP users) compared to the reference scheduler (at most 388 kbps) and FHCF (with a maximum FTP throughput of 4.8 Mbps).
    close
    @Article{NAVARROORTIZ20091281,
    title = {An 802.11e {HCCA} scheduler with an end-to-end quality aware territory method},
    journal = {Computer Communications},
    volume = {32},
    number = {11},
    pages = {1281-1297},
    year = {2009},
    note = {Special Issue of Computer Communications on Heterogeneous Networking for Quality, Reliability, Security, and Robustness - Part I},
    issn = {0140-3664},
    doi = {https://doi.org/10.1016/j.comcom.2008.12.014},
    author = {Jorge Navarro-Ortiz and Pablo Ameigeiras and Juan J. Ramos-Munoz and Juan M. Lopez-Soler},
    keywords = {802.11e, HCCA, Quality of Experience, Scheduler, Resource allocation},
    abstract = {In this paper we present a solution for the {IEEE} 802.11e HCCA (Hybrid coordination function Controlled Channel Access) mechanism which aims both at supporting strict real-time traffic requirements and, simultaneously, at handling TCP applications efficiently. Our proposal combines a packet scheduler and a dynamic resource allocation algorithm. The scheduling discipline is based on the Monolithic Shaper-Scheduler, which is a modification of a General Processor Sharing (GPS) related scheduler. It supports minimum-bandwidth and delay guarantees and, at the same time, it achieves the optimal latency of all the GPS-related schedulers. In addition, our innovative resource allocation procedure, called the territory method, aims at prioritizing real time services and at improving the performance of TCP applications. For this purpose, it splits the wireless channel capacity (in terms of transmission opportunities) into different territories for the different types of traffic, taking into account the end-to-end network dynamics. In order to give support to the desired applications, we consider the following traffic classes: conversational, streaming, interactive and best-effort. The so called territories shrink or expand depending on the current quality experienced by the corresponding traffic class. We evaluated the performance of our solution through extensive simulations in a heterogeneous wired-cum-wireless scenario under different traffic conditions. Additionally, we compare our proposal to other HCCA scheduling algorithms, the HCCA reference scheduler and Fair Hybrid Coordination Function (FHCF). The results show that the combination of the MSS and the territory method obtains higher system capacity for VoIP traffic (up to 32 users) in the simulated scenario, compared to FHCF and the HCCA reference scheduler (13 users). In addition, the MSS with the territory method also improves the throughput of TCP sources (one FTP application achieves between 6.1 Mbps without VoIP traffic and 2.1 Mbps with 20 VoIP users) compared to the reference scheduler (at most 388 kbps) and FHCF (with a maximum FTP throughput of 4.8 Mbps).},
    impact={(IF=0.933, Q2)}
    }
    close

  31. BOOTES-IR: Near IR Follow-up GRB Observations by a Robotic System
    J. Castro-Tirado, A. de Ugarte Postigo, M. Jelínek, S. Castillo Carrión, T. J. Mateo Sanguino, P. Kubánek, F. Zerbi, P. Amado, C. Cárdenas, A. Claret, J. Gorosabel, S. Martín, M. A. Sánchez, P. García Teodoro, J. M. Castro Cerón, J. Díaz Verdejo, J. M. López Soler, J. Á. Berná Galiano, J. Casares, J. Fabregat, C. Sánchez Fernández, P. Conconi, S. Guziy, F. Vitaly
    Nuovo Cimento Della Societa Italiana di Fisica. C, Geophysics and Space Physics., 28, 2005, DOI: https://doi.org/10.1393/ncc/i2005-10138-9. (IF=0.31, Q4)
    "BOOTES-IR: Near IR Follow-up GRB Observations by a Robotic System", J. Castro-Tirado, A. de Ugarte Postigo, M. Jelínek, S. Castillo Carrión, T. J. Mateo Sanguino, P. Kubánek, F. Zerbi, P. Amado, C. Cárdenas, A. Claret, J. Gorosabel, S. Martín, M. A. Sánchez, P. García Teodoro, J. M. Castro Cerón, J. Díaz Verdejo, J. M. López Soler, J. Á. Berná Galiano, J. Casares, J. Fabregat, C. Sánchez Fernández, P. Conconi, S. Guziy, F. Vitaly, Nuovo Cimento Della Societa Italiana di Fisica. C, Geophysics and Space Physics., 28, 2005. DOI: https://doi.org/10.1393/ncc/i2005-10138-9
    close
    BOOTES-IR is the extension of the BOOTES experiment, which
    operates in Southern Spain since 1998, to the near IR (NIR). The goal is to follow
    up the early stage of the gamma ray burst (GRB) afterglow emission in the NIR,
    alike BOOTES does already at optical wavelengths. The scientific case that drives
    the BOOTES-IR performance is the study of GRBs with the support of spacecraft
    like INTEGRAL, SWIFT and GLAST. Given that the afterglow emission in both,
    the NIR and the optical, in the instances immediately following a GRB, is extremely
    bright (reached V = 8.9 in one case), it should be possible to detect this prompt
    emission at NIR wavelengths too. The combined observations by BOOTES-IR and
    BOOTES-1 and BOOTES-2 will allow for real time identification of trustworthy
    candidates to have a high redshift (z > 5). It is expected that, few minutes after
    a GRB, the IR magnitudes be H ? 7–10, hence very high quality spectra can be
    obtained for objects as far as z = 10 by larger instruments.
    close
    @article{CASTRO2005,
    title = {BOOTES-IR: Near IR Follow-up GRB Observations by a Robotic System},
    journal = {Nuovo Cimento Della Societa Italiana di Fisica. C, Geophysics and Space Physics.},
    volume = {28},
    issue = {4-5}
    pages = {719-722},
    year = {2005},
    doi = {https://doi.org/10.1393/ncc/i2005-10138-9},
    url = {https://www.sif.it/riviste/sif/ncc/econtents/2005/028/04-05/article/34},
    author = {J. Castro-Tirado and A. de Ugarte Postigo and M. Jelínek and S. Castillo Carrión and T. J. Mateo Sanguino and P. Kubánek and  F. Zerbi and  P. Amado and  C. Cárdenas and  A. Claret and  J. Gorosabel and  S. Martín and  M. A. Sánchez and  P. García Teodoro and  J. M. Castro Cerón and  J. Díaz Verdejo and  J. M. López Soler and  J. Á. Berná Galiano and  J. Casares and  J. Fabregat and  C. Sánchez Fernández and  P. Conconi and  S. Guziy and  F. Vitaly},
    abstract = {BOOTES-IR is the extension of the BOOTES experiment, which
    operates in Southern Spain since 1998, to the near IR (NIR). The goal is to follow
    up the early stage of the gamma ray burst (GRB) afterglow emission in the NIR,
    alike BOOTES does already at optical wavelengths. The scientific case that drives
    the BOOTES-IR performance is the study of GRBs with the support of spacecraft
    like INTEGRAL, SWIFT and GLAST. Given that the afterglow emission in both,
    the NIR and the optical, in the instances immediately following a GRB, is extremely
    bright (reached V = 8.9 in one case), it should be possible to detect this prompt
    emission at NIR wavelengths too. The combined observations by BOOTES-IR and
    BOOTES-1 and BOOTES-2 will allow for real time identification of trustworthy
    candidates to have a high redshift (z > 5). It is expected that, few minutes after
    a GRB, the IR magnitudes be H ? 7–10, hence very high quality spectra can be
    obtained for objects as far as z = 10 by larger instruments.},
    impact={(IF=0.31, Q4)}}
    close

  32. Linear inter-frame dependencies for very low bit-rate speech coding
    Juan M. López-Soler, Victoria Sánchez, Angel de la Torre, Antonio J. Rubio-Ayuso
    Speech Communication, 34 (4), pp. 333-349, 2001, DOI: https://doi.org/10.1016/S0167-6393(00)00039-X. (IF=0.45, Q3)
    "Linear inter-frame dependencies for very low bit-rate speech coding", Juan M. López-Soler, Victoria Sánchez, Angel de la Torre, Antonio J. Rubio-Ayuso, Speech Communication, 34 (4), pp. 333-349, 2001. DOI: https://doi.org/10.1016/S0167-6393(00)00039-X
    close
    We have studied experimentally the operational rate-distortion performance for very low bit-rate speech coding using linear inter-frame dependencies. We propose an algorithm that efficiently combines quantization and linear interpolation procedures. With a maximum delay of 200 ms, for the spectral envelope information and using line spectrum pair (LSP) parameters as input space the proposed algorithm performs best at rates of between 200 and 300 b/s. For comparison's sake several other procedures such as the multi-frame encoder (Kemp D., Collura J., Tremain T., Multi-Frame Coding of LPC Parameters at 600–800 bps. In: IEEE ICASSP-91, 1991, pp. 609–612) and matrix quantizer (Tsao C., Gray R., Matrix quantizer design for LPC speech using the generalized Lloyd algorithm. IEEE Transactions on Acoustics, Speech, and Signal Processing ASSP-33, 1985, 537–545) are simulated. Furthermore, a mono-dimensional version of the proposed procedure is shown experimentally to provide the best operational rate-distortion trade-off when coding a parametric representation (pitch, gain and voicing information) of the excitation signal.
    close
    @article{LOPEZSOLER2001333,
    title = {Linear inter-frame dependencies for very low bit-rate speech coding},
    journal = {Speech Communication},
    volume = {34},
    number = {4},
    pages = {333-349},
    year = {2001},
    issn = {0167-6393},
    doi = {https://doi.org/10.1016/S0167-6393(00)00039-X},
    url = {https://www.sciencedirect.com/science/article/pii/S016763930000039X},
    author = {Juan M. López-Soler and Victoria Sánchez and Angel {de la Torre} and Antonio J. Rubio-Ayuso},
    keywords = {Speech coding, Quantization, Interpolation, Inter-frame dependencies},
    abstract = {We have studied experimentally the operational rate-distortion performance for very low bit-rate speech coding using linear inter-frame dependencies. We propose an algorithm that efficiently combines quantization and linear interpolation procedures. With a maximum delay of 200 ms, for the spectral envelope information and using line spectrum pair (LSP) parameters as input space the proposed algorithm performs best at rates of between 200 and 300 b/s. For comparison's sake several other procedures such as the multi-frame encoder (Kemp D., Collura J., Tremain T., Multi-Frame Coding of LPC Parameters at 600–800 bps. In: IEEE ICASSP-91, 1991, pp. 609–612) and matrix quantizer (Tsao C., Gray R., Matrix quantizer design for LPC speech using the generalized Lloyd algorithm. IEEE Transactions on Acoustics, Speech, and Signal Processing ASSP-33, 1985, 537–545) are simulated. Furthermore, a mono-dimensional version of the proposed procedure is shown experimentally to provide the best operational rate-distortion trade-off when coding a parametric representation (pitch, gain and voicing information) of the excitation signal.}, impact={(IF=0.45, Q3)}}
    close

  33. A transcription-based approach to determine the difficulty of a speech recognition task
    P. Garcia, A. J. Rubio, J. Diaz-Verdejo, M. C. Benitez, J. M. Lopez-Soler
    IEEE Transactions on Speech and Audio Processing, 7 (3), pp. 339-342, May 1999, DOI: 10.1109/89.759043. (IF=0.66, Q2)
    "A transcription-based approach to determine the difficulty of a speech recognition task", P. Garcia, A. J. Rubio, J. Diaz-Verdejo, M. C. Benitez, J. M. Lopez-Soler, IEEE Transactions on Speech and Audio Processing, 7 (3), pp. 339-342, 1999. DOI: 10.1109/89.759043
    close
    A new parameter for estimating the difficulty of a continuous speech recognition task, called speech decoding difficulty, is presented. It is obtained from the language model defined for the recognition task and the phonetic similarity between the transcriptions of the words that make up the vocabulary used. Two variants of the proposed task difficulty measure are introduced: ideal speech decoding difficulty (ISDD), which is not influenced by practical considerations on the recognition system implemented, and a second, more realistic variant, called practical speech decoding difficulty (PSDD) to study the performance of a specific recognition system when confronting a given task.
    close
    @ARTICLE{759043,  author={P. {Garcia} and A. J. {Rubio} and J. {Diaz-Verdejo} and M. C. {Benitez} and J. M. {Lopez-Soler}},  journal={IEEE Transactions on Speech and Audio Processing},   title={A transcription-based approach to determine the difficulty of a speech recognition task},   year={1999},  volume={7},  number={3},  pages={339-342},  abstract={A new parameter for estimating the difficulty of a continuous speech recognition task, called speech decoding difficulty, is presented. It is obtained from the language model defined for the recognition task and the phonetic similarity between the transcriptions of the words that make up the vocabulary used. Two variants of the proposed task difficulty measure are introduced: ideal speech decoding difficulty (ISDD), which is not influenced by practical considerations on the recognition system implemented, and a second, more realistic variant, called practical speech decoding difficulty (PSDD) to study the performance of a specific recognition system when confronting a given task.},  keywords={Speech recognition;Maximum likelihood decoding;Natural languages;Vocabulary;Acoustic testing;System testing;Character recognition;Parameter estimation;Loudspeakers;Maximum likelihood estimation},  doi={10.1109/89.759043},  ISSN={1558-2353},  month={May}, impact={(IF=0.66, Q2)}}
    close

  34. A low-delay transform domain approach to trellis coded quantization
    Victoria Sánchez, Antonio J. Rubio, Juan M. López-Soler, Ángel de la Torre, Antonio M. Peinado
    Speech Communication, 21 (3), pp. 141-153, 1997, DOI: https://doi.org/10.1016/S0167-6393(97)00006-X. (IF=0.42, Q2)
    "A low-delay transform domain approach to trellis coded quantization", Victoria Sánchez, Antonio J. Rubio, Juan M. López-Soler, Ángel de la Torre, Antonio M. Peinado, Speech Communication, 21 (3), pp. 141-153, 1997. DOI: https://doi.org/10.1016/S0167-6393(97)00006-X
    close
    In this paper we propose a new transform domain coding technique called transform trellis coded quantization (TTCQ) that is based on the trellis coded quantization technique recently proposed where Ungerboeck's amplitude modulation trellises and set partitioning ideas are used for source coding. We combine the proposed technique with a transform domain formulation for small frame sizes obtaining a transform domain scheme suitable for low-delay speech coding. We have applied this scheme to the coding of 7 kHz wideband speech, studying its performance for several discrete transforms and comparing it with a predictive version of the trellis coded quantization technique for different bit rates and number of states in the trellis.
    Résumé
    Dans ce papier nous proposons une nouvelle technique de codage dans un espace transformé appelée “Transform Trellis Coded Quantization” (TTCQ). Cette technique se base sur la quantification en codage par treillis proposée récemment où les treillis de modulation d'amplitude d'Ungerboeck et les idées de partition d�nsembles sont utilisés pour effectuer le codage de source. Dans l'approche décrite dans ce papier nous combinons la technique de quantification en codage par treillis avec une formulation de transformation d�space pour des trames de largeurs réduites afin d'obtenir un schéma de codage dans un espace transformé approprié pour le codage de la parole à faible délai. Nous avons appliqué ce schéma pour le codage de la parole avec une largeur de bande de 7 KHz en étudiant sa performance pour diverses transformations discrètes. Nous avons comparé ce schéma à une version prédictive de la technique de quantification en codage par treillis pour différents débits binaires et différents nombres d'états dans le treillis.
    close
    @article{SANCHEZ1997141,
    title = {A low-delay transform domain approach to trellis coded quantization},
    journal = {Speech Communication},
    volume = {21},
    number = {3},
    pages = {141-153},
    year = {1997},
    issn = {0167-6393},
    doi = {https://doi.org/10.1016/S0167-6393(97)00006-X},
    url = {https://www.sciencedirect.com/science/article/pii/S016763939700006X},
    author = {Victoria Sánchez and Antonio J. Rubio and Juan M. López-Soler and Ángel {de la Torre} and Antonio M. Peinado},
    keywords = {Speech coding, Transform domain, Trellis coded quantization, Low-delay, Discrete cosine transform},
    abstract = {In this paper we propose a new transform domain coding technique called transform trellis coded quantization (TTCQ) that is based on the trellis coded quantization technique recently proposed where Ungerboeck's amplitude modulation trellises and set partitioning ideas are used for source coding. We combine the proposed technique with a transform domain formulation for small frame sizes obtaining a transform domain scheme suitable for low-delay speech coding. We have applied this scheme to the coding of 7 kHz wideband speech, studying its performance for several discrete transforms and comparing it with a predictive version of the trellis coded quantization technique for different bit rates and number of states in the trellis.
    Résumé
    Dans ce papier nous proposons une nouvelle technique de codage dans un espace transformé appelée “Transform Trellis Coded Quantization” (TTCQ). Cette technique se base sur la quantification en codage par treillis proposée récemment où les treillis de modulation d'amplitude d'Ungerboeck et les idées de partition d'ensembles sont utilisés pour effectuer le codage de source. Dans l'approche décrite dans ce papier nous combinons la technique de quantification en codage par treillis avec une formulation de transformation d'espace pour des trames de largeurs réduites afin d'obtenir un schéma de codage dans un espace transformé approprié pour le codage de la parole à faible délai. Nous avons appliqué ce schéma pour le codage de la parole avec une largeur de bande de 7 KHz en étudiant sa performance pour diverses transformations discrètes. Nous avons comparé ce schéma à une version prédictive de la technique de quantification en codage par treillis pour différents débits binaires et différents nombres d'états dans le treillis.},
    impact={(IF=0.42, Q2)}}
    close

  35. Improvements in HMM-based isolated word recognition system
    A.M. Peinado, J.M. Lopez, V.E. Sanchez, J.C. Segura, A.J. Rubio Ayuso
    IEE Proceedings I (Communications, Speech and Vision), 138, pp. 201-206(5), June 1991, DOI: 10.1049/ip-i-2.1991.0027. (IF=0.18, Q3)
    "Improvements in HMM-based isolated word recognition system", A.M. Peinado, J.M. Lopez, V.E. Sanchez, J.C. Segura, A.J. Rubio Ayuso, IEE Proceedings I (Communications, Speech and Vision), 138, pp. 201-206(5), 1991. DOI: 10.1049/ip-i-2.1991.0027
    close
    A speaker independent isolated word recognition system for voice activated robots is introduced. Since such an application requires a fast and accurate recognition system, discrete hidden Markov models and vector quantisation techniques have been used. Different initialisations for VQ and HMM training are tested to obtain improvements over the other systems. The final models can be evaluated using a temporal normalisation of the HMM scores. A threshold based rejector can also be established using this temporal normalisation.
    close
    @ARTICLE{peinado91,
       author = {A.M. Peinado and J.M. Lopez and V.E. Sanchez and J.C. Segura and A.J. Rubio Ayuso},
       keywords = {HMM scores;speaker-independent system;vector quantisation;training algorithms;discrete hidden Markov models;temporal normalisation;voice-activated robots;HMM-based isolated word recognition system;threshold-based rejector;},
       ISSN = {0956-3776},
       language = {English},
       abstract = {A speaker independent isolated word recognition system for voice activated robots is introduced. Since such an application requires a fast and accurate recognition system, discrete hidden Markov models and vector quantisation techniques have been used. Different initialisations for VQ and HMM training are tested to obtain improvements over the other systems. The final models can be evaluated using a temporal normalisation of the HMM scores. A threshold based rejector can also be established using this temporal normalisation.},
       title = {Improvements in HMM-based isolated word recognition system},
       journal = {IEE Proceedings I (Communications, Speech and Vision)},
       issue = {3},
       volume = {138},
       year = {1991},
       month = {June},
       pages = {201-206(5)},
       publisher ={},
       copyright = {The Institution of Electrical Engineers},
       url = {https://digital-library.theiet.org/content/journals/10.1049/ip-i-2.1991.0027},
    doi = {10.1049/ip-i-2.1991.0027},
    impact={(IF=0.18, Q3)}}
    close


Conferences & Workshops

  1. Analytical Model for the UE Blocking Probability in an OFDMA Cell providing GBR Slices
    O. Adamuz-Hinojosa, P. Ameigeiras, P. Munoz, J. M. Lopez-Soler
    2021 IEEE Wireless Communications and Networking Conference (WCNC), Nanjing, China, pp. 1-7, Mar. 2021.
    "Analytical Model for the UE Blocking Probability in an OFDMA Cell providing GBR Slices", O. Adamuz-Hinojosa, P. Ameigeiras, P. Munoz, J. M. Lopez-Soler, "2021 IEEE Wireless Communications and Networking Conference (WCNC), Nanjing, China", pp. 1-7, 2021
    close
    When a network operator designs strategies for planning and operating Guaranteed Bit Rate (GBR) slices, there are inherent issues such as the under(over)-provisioning of radio resources. To avoid them, modeling the User Equipment (UE) blocking probability in each cell is key. This task is challenging due to the total required bandwidth depends on the channel quality of each UE and the spatio-temporal variations in the number of UE sessions. Under this context, we propose an analytical model to evaluate the UE blocking probability in an Orthogonal Frequency Division Multiple Access (OFDMA) cell. The main novelty of our model is the adoption of a multi-dimensional Erlang-B system which meets the reversibility property. This means our model is insensitive to the holding time distribution for the UE session. In addition, this property reduces the computational complexity of our model due to the solution for the state transition probabilities has product form. The provided results show that our model exhibits an estimation error for the UE blocking probability below 3.5%.
    close
    @INPROCEEDINGS{OscarCellModel2021,
    author={O. {Adamuz-Hinojosa} and P. {Ameigeiras} and P. {Munoz} and J. M. {Lopez-Soler} },
    booktitle={2021 IEEE Wireless Communications and Networking Conference (WCNC), Nanjing, China},
    title={Analytical Model for the UE Blocking Probability in an OFDMA Cell providing GBR Slices},
    year={2021},
    volume={},
    number={},
    pages={1-7},
    abstract={When a network operator designs strategies for planning and operating Guaranteed Bit Rate (GBR) slices, there are inherent issues such as the under(over)-provisioning of radio resources. To avoid them, modeling the User Equipment (UE) blocking probability in each cell is key. This task is challenging due to the total required bandwidth depends on the channel quality of each UE and the spatio-temporal variations in the number of UE sessions. Under this context, we propose an analytical model to evaluate the UE blocking probability in an Orthogonal Frequency Division Multiple Access (OFDMA) cell. The main novelty of our model is the adoption of a multi-dimensional Erlang-B system which meets the reversibility property. This means our model is insensitive to the holding time distribution for the UE session. In addition, this property reduces the computational complexity of our model due to the solution for the state transition probabilities has product form. The provided results show that our model exhibits an estimation error for the UE blocking probability below 3.5%.},
    keywords={Blocking probability; OFDMA; GBR; Erlang-B},
    doi={},
    ISSN={},
    month={Mar.},
    project={5gclarity|true5g}
    }
    close

  2. Asynchronous Time-Sensitive Networking for Industrial Networks
    Jonathan Prados-Garzon, Lorena Chinchilla-Romero, Pablo Ameigeiras, Pablo Muñoz, Juan M. Lopez-Soler
    2021 Joint European Conference on Networks and Communications 6G Summit (EuCNC/6G Summit), pp. 130-135, 2021, DOI: 10.1109/EuCNC/6GSummit51104.2021.9482597.
    "Asynchronous Time-Sensitive Networking for Industrial Networks", Jonathan Prados-Garzon, Lorena Chinchilla-Romero, Pablo Ameigeiras, Pablo Muñoz, Juan M. Lopez-Soler, "2021 Joint European Conference on Networks and
    Communications   6G Summit (EuCNC/6G Summit)", pp. 130-135, 2021. DOI: 10.1109/EuCNC/6GSummit51104.2021.9482597
    close
    @INPROCEEDINGS{9482597,
       author={Prados-Garzon, Jonathan and Chinchilla-Romero, Lorena and Ameigeiras, Pablo and Muñoz, Pablo and Lopez-Soler, Juan M.},
       booktitle={2021 Joint European Conference on Networks and
    Communications   6G Summit (EuCNC/6G Summit)},
       title={Asynchronous Time-Sensitive Networking for Industrial Networks},
       year={2021},
       volume={},
       number={},
       pages={130-135},
       project={5gclarity|true5g},
       doi={10.1109/EuCNC/6GSummit51104.2021.9482597}}
    close

  3. 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
    close
    @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}}
    close

  4. Sharing gNB components in RAN slicing: A perspective from 3GPP/NFV standards
    O. Adamuz-Hinojosa, P. Muñoz, P. Ameigeiras, J. M. Lopez-Soler
    2019 IEEE Conference on Standards for Communications and Networking (CSCN), pp. 1-7, October 2019, DOI: 10.1109/CSCN.2019.8931318.
    "Sharing gNB components in RAN slicing: A perspective from 3GPP/NFV standards", O. Adamuz-Hinojosa, P. Muñoz, P. Ameigeiras, J. M. Lopez-Soler, "2019 IEEE Conference on Standards for Communications and Networking (CSCN)", pp. 1-7, 2019. DOI: 10.1109/CSCN.2019.8931318
    close
    To implement the next Generation NodeBs (gNBs) that are present in every Radio Access Network (RAN) slice subnet, Network Function Virtualization (NFV) enables the deployment of some of the gNB components as Virtual Networks Functions (VNFs). Deploying individual VNF instances for these components could guarantee the customization of each RAN slice subnet. However, due to the multiplicity of VNFs, the required amount of virtual resources will be greater compared to the case where a single VNF instance carries the aggregated traffic of all the RAN slice subnets. Sharing gNB components between RAN slice subnets could optimize the trade-off between customization, isolation and resource utilization. In this article, we shed light on the key aspects in the Third Generation Partnership Project (3GPP)/NFV standards for sharing gNB components. First, we identify four possible scenarios for sharing gNB components. Then, we analyze the impact of sharing on the customization level of each RAN slice subnet. Later, we determine the main factors that enable isolation between RAN slice subnets. Finally, we propose a 3GPP/NFV-based description model to define the lifecycle management of shared gNB components.
    close
    @INPROCEEDINGS{8931318,  author={O. {Adamuz-Hinojosa} and P. {Muñoz} and P. {Ameigeiras} and J. M. {Lopez-Soler}},  booktitle={2019 IEEE Conference on Standards for Communications and Networking (CSCN)},   title={Sharing gNB components in RAN slicing: A perspective from 3GPP/NFV standards},   year={2019},  volume={},  number={},  pages={1-7},  abstract={To implement the next Generation NodeBs (gNBs) that are present in every Radio Access Network (RAN) slice subnet, Network Function Virtualization (NFV) enables the deployment of some of the gNB components as Virtual Networks Functions (VNFs). Deploying individual VNF instances for these components could guarantee the customization of each RAN slice subnet. However, due to the multiplicity of VNFs, the required amount of virtual resources will be greater compared to the case where a single VNF instance carries the aggregated traffic of all the RAN slice subnets. Sharing gNB components between RAN slice subnets could optimize the trade-off between customization, isolation and resource utilization. In this article, we shed light on the key aspects in the Third Generation Partnership Project (3GPP)/NFV standards for sharing gNB components. First, we identify four possible scenarios for sharing gNB components. Then, we analyze the impact of sharing on the customization level of each RAN slice subnet. Later, we determine the main factors that enable isolation between RAN slice subnets. Finally, we propose a 3GPP/NFV-based description model to define the lifecycle management of shared gNB components.},  keywords={3GPP;Computer architecture;Ultra reliable low latency communication;Protocols;Next generation networking;Network function virtualization;3GPP;NFV;RAN slicing;sharing gNB components;description model},  doi={10.1109/CSCN.2019.8931318},  ISSN={2644-3252},  month={October}, project={5gcity|artemis}, pdf={https://digibug.ugr.es/handle/10481/68197}
    }
    close

  5. Analytic Analysis of Narrowband IoT Coverage Enhancement Approaches
    P. Andres-Maldonado, P. Ameigeiras, J. Prados-Garzon, J. J. Ramos-Munoz, J. Navarro-Ortiz, J. M. Lopez-Soler
    2018 Global Internet of Things Summit (GIoTS), pp. 1-6, June 2018, DOI: 10.1109/GIOTS.2018.8534539.
    "Analytic Analysis of Narrowband IoT Coverage Enhancement Approaches", P. Andres-Maldonado, P. Ameigeiras, J. Prados-Garzon, J. J. Ramos-Munoz, J. Navarro-Ortiz, J. M. Lopez-Soler, "2018 Global Internet of Things Summit (GIoTS)", pp. 1-6, 2018. DOI: 10.1109/GIOTS.2018.8534539
    close
    The introduction of Narrowband Internet of Things (NB-IoT) as a cellular (NB-IoT) technology aims to support massive Machine-Type Communications applications. These applications are characterized by massive connections from a large number of low-complexity and low-power devices. One of the goals of NB-IoT is to improve coverage extension beyond existing cellular technologies. In order to do that, NB-IoT introduces transmission repetitions and different bandwidth allocation configurations in uplink. These new transmission approaches yield many transmission options in uplink. In this paper, we propose analytical expressions that describe the influence of these new approaches in the transmission. Our analysis is based on the Shannon theorem. The transmission is studied in terms of the required Signal to Noise Ratio, bandwidth utilization, and energy per transmitted bit. Additionally, we propose an uplink link adaptation algorithm that contemplates these new transmission approaches. The conducted evaluation summarizes the influence of these approaches. Furthermore, we present the resulting uplink link adaptation from our proposed algorithm sweeping the device's coverage.
    close
    @INPROCEEDINGS{8534539,  author={P. {Andres-Maldonado} and P. {Ameigeiras} and J. {Prados-Garzon} and J. J. {Ramos-Munoz} and J. {Navarro-Ortiz} and J. M. {Lopez-Soler}},  booktitle={2018 Global Internet of Things Summit (GIoTS)},   title={Analytic Analysis of Narrowband IoT Coverage Enhancement Approaches},   year={2018},  volume={},  number={},  pages={1-6},  abstract={The introduction of Narrowband Internet of Things (NB-IoT) as a cellular (NB-IoT) technology aims to support massive Machine-Type Communications applications. These applications are characterized by massive connections from a large number of low-complexity and low-power devices. One of the goals of NB-IoT is to improve coverage extension beyond existing cellular technologies. In order to do that, NB-IoT introduces transmission repetitions and different bandwidth allocation configurations in uplink. These new transmission approaches yield many transmission options in uplink. In this paper, we propose analytical expressions that describe the influence of these new approaches in the transmission. Our analysis is based on the Shannon theorem. The transmission is studied in terms of the required Signal to Noise Ratio, bandwidth utilization, and energy per transmitted bit. Additionally, we propose an uplink link adaptation algorithm that contemplates these new transmission approaches. The conducted evaluation summarizes the influence of these approaches. Furthermore, we present the resulting uplink link adaptation from our proposed algorithm sweeping the device's coverage.},  keywords={Uplink;Signal to noise ratio;Internet of Things;Long Term Evolution;Narrowband;Data communication;Analytical model;coverage enhancement;link adaptation;nB-IoT},  doi={10.1109/GIOTS.2018.8534539},  ISSN={},  month={June}
    }
    close

  6. An architecture for the 5G control plane based on SDN and data distribution service
    A. Llorens-Carrodeguas, C. Cervello-Pastor, I. Leyva-Pupo, J. M. Lopez-Soler, J. Navarro-Ortiz, J. A. Exposito-Arenas
    2018 Fifth International Conference on Software Defined Systems (SDS), pp. 105-111, 2018, DOI: 10.1109/SDS.2018.8370430.
    "An architecture for the 5G control plane based on SDN and data distribution service", A. Llorens-Carrodeguas, C. Cervello-Pastor, I. Leyva-Pupo, J. M. Lopez-Soler, J. Navarro-Ortiz, J. A. Exposito-Arenas, "2018 Fifth International Conference on Software Defined Systems (SDS)", pp. 105-111, 2018. DOI: 10.1109/SDS.2018.8370430
    close
    @Inproceedings{8370430,  author={A. {Llorens-Carrodeguas} and C. {Cervello-Pastor} and I. {Leyva-Pupo} and J. M. {Lopez-Soler} and J. {Navarro-Ortiz} and J. A. {Exposito-Arenas}},  booktitle={2018 Fifth International Conference on Software Defined Systems (SDS)},   title={An architecture for the 5G control plane based on SDN and data distribution service},   year={2018},  volume={},  number={},  pages={105-111},  doi={10.1109/SDS.2018.8370430}, project={5gcity}}
    close

  7. WiMuNet's research on 5G and QoE
    J. Prados-Garzon, P. Andres-Maldonado, P. Romero-Diaz, J. Navarro-Ortiz, J. J. Ramos-Munoz, P. Ameigeiras, P. Munoz-Luengo, S. Sendra, J. M. Lopez-Soler
    IV Workshop on QoE, QoS on Multimedia Communications (QQCM'18), 2018.
    "WiMuNet's research on 5G and QoE", J. Prados-Garzon, P. Andres-Maldonado, P. Romero-Diaz, J. Navarro-Ortiz, J. J. Ramos-Munoz, P. Ameigeiras, P. Munoz-Luengo, S. Sendra, J. M. Lopez-Soler, "IV Workshop on QoE, QoS on Multimedia Communications (QQCM'18)", 2018
    close
    @Inproceedings{jpradosqqcm18,  author={J. {Prados-Garzon} and P. {Andres-Maldonado} and P. {Romero-Diaz} and J. {Navarro-Ortiz} and J. J. {Ramos-Munoz} and P. {Ameigeiras} and P. {Munoz-Luengo} and S. {Sendra} and J. M. {Lopez-Soler}},  booktitle={IV Workshop on QoE, QoS on Multimedia Communications (QQCM'18)}, title={WiMuNet's research on 5G and QoE}, year={2018}, project={5gcity}}
    close

  8. The Roll of Data Distribution Service in Failure-aware SDN Controllers
    A. Llorens-Carrodeaguas, C. Cervello-Pastor, I. Leyva-Pupo, J. M. Lopez-Soler, J. Navarro-Ortiz
    XXXIII Simposium Nacional de la Unión Científica Internacional de Radio (URSI 2018), 2018.
    "The Roll of Data Distribution Service in Failure-aware SDN Controllers", A. Llorens-Carrodeaguas, C. Cervello-Pastor, I. Leyva-Pupo, J. M. Lopez-Soler, J. Navarro-Ortiz, "XXXIII Simposium Nacional de la Unión Científica Internacional de Radio (URSI 2018)", 2018
    close
    @Inproceedings{allorensursi18,  author={A. {Llorens-Carrodeaguas} and C. {Cervello-Pastor} and I. {Leyva-Pupo} and J. M. {Lopez-Soler} and J. {Navarro-Ortiz}},  booktitle={XXXIII Simposium Nacional de la Unión Científica Internacional de Radio (URSI 2018)},   title={The Roll of Data Distribution Service in Failure-aware SDN Controllers},   year={2018}, url={http://wpd.ugr.es/~jorgenavarro/publications/preprint_dds_sdn_controllers.pdf}, project={5gcity}, pdf={https://upcommons.upc.edu/handle/2117/126845}}
    close

  9. Analytical modeling for Virtualized Network Functions
    J. Prados-Garzon, P. Ameigeiras, J. J. Ramos-Munoz, P. Andres-Maldonado, J. M. Lopez-Soler
    2017 IEEE International Conference on Communications Workshops (ICC Workshops), pp. 979-985, May 2017, DOI: 10.1109/ICCW.2017.7962786.
    "Analytical modeling for Virtualized Network Functions", J. Prados-Garzon, P. Ameigeiras, J. J. Ramos-Munoz, P. Andres-Maldonado, J. M. Lopez-Soler, "2017 IEEE International Conference on Communications Workshops (ICC Workshops)", pp. 979-985, 2017. DOI: 10.1109/ICCW.2017.7962786
    close
    Network Function Virtualization (NFV) is considered one of the key technologies for the 5G mobile networks. In NFV, network functions are implemented in software components denominated Virtual Network Functions (VNFs) running on commodity hardware. In this paper, we propose an analytical model based on an open queuing network of G/G/m queues to model VNFs with several components, and chains of VNFs. Our model is flexible and generic enough to capture the behavior of such systems. We validate our model by simulation. Specifically, we validate it for an LTE virtualized Mobility Management Entity with a three-tiered architecture use case. We also compare our model with the estate of the art, in terms of computational complexity and estimation error. The results show that our model has a computational complexity similar to the method for analyzing Jackson's networks. Additionally, our model exhibits an estimation error, measured as the relative error for the estimation of the mean response time, approximately equal to 10%, whereas for the considered baseline systems it ranges roughly from 60% to 90%.
    close
    @INPROCEEDINGS{7962786,  author={J. {Prados-Garzon} and P. {Ameigeiras} and J. J. {Ramos-Munoz} and P. {Andres-Maldonado} and J. M. {Lopez-Soler}},  booktitle={2017 IEEE International Conference on Communications Workshops (ICC Workshops)},   title={Analytical modeling for Virtualized Network Functions},   year={2017},  volume={},  number={},  pages={979-985},  abstract={Network Function Virtualization (NFV) is considered one of the key technologies for the 5G mobile networks. In NFV, network functions are implemented in software components denominated Virtual Network Functions (VNFs) running on commodity hardware. In this paper, we propose an analytical model based on an open queuing network of G/G/m queues to model VNFs with several components, and chains of VNFs. Our model is flexible and generic enough to capture the behavior of such systems. We validate our model by simulation. Specifically, we validate it for an LTE virtualized Mobility Management Entity with a three-tiered architecture use case. We also compare our model with the estate of the art, in terms of computational complexity and estimation error. The results show that our model has a computational complexity similar to the method for analyzing Jackson's networks. Additionally, our model exhibits an estimation error, measured as the relative error for the estimation of the mean response time, approximately equal to 10%, whereas for the considered baseline systems it ranges roughly from 60% to 90%.},  keywords={Computational modeling;Analytical models;Iron;5G mobile communication;Computer architecture;Time factors;Queueing analysis;5G;NFV;VNF;analytical model;queuing model},  doi={10.1109/ICCW.2017.7962786},  ISSN={2474-9133},  month={May}, project={5gcity}
    }
    close

  10. Optimized LTE data transmission procedures for IoT: Device side energy consumption analysis
    P. Andres-Maldonado, P. Ameigeiras, J. Prados-Garzon, J. J. Ramos-Munoz, J. M. Lopez-Soler
    2017 IEEE International Conference on Communications Workshops (ICC Workshops), pp. 540-545, May 2017, DOI: 10.1109/ICCW.2017.7962714.
    "Optimized LTE data transmission procedures for IoT: Device side energy consumption analysis", P. Andres-Maldonado, P. Ameigeiras, J. Prados-Garzon, J. J. Ramos-Munoz, J. M. Lopez-Soler, "2017 IEEE International Conference on Communications Workshops (ICC Workshops)", pp. 540-545, 2017. DOI: 10.1109/ICCW.2017.7962714
    close
    The efficient deployment of Internet of Things (IoT) over cellular networks, such as Long Term Evolution (LTE) or the next generation 5G, entails several challenges. For massive IoT, reducing the energy consumption on the device side becomes essential. One of the main characteristics of massive IoT is small data transmissions. To improve the support of them, the 3GPP has included two novel optimizations in LTE: one of them based on the Control Plane (CP), and the other on the User Plane (UP). In this paper, we analyze the average energy consumption per data packet using these two optimizations compared to conventional LTE Service Request procedure. We propose an analytical model to calculate the energy consumption for each procedure based on a Markov chain. In the considered scenario, for large and small Inter-Arrival Times (IATs), the results of the three procedures are similar. While for medium IATs CP reduces the energy consumption per packet up to 87% due to its connection release optimization.
    close
    @INPROCEEDINGS{7962714,  author={P. {Andres-Maldonado} and P. {Ameigeiras} and J. {Prados-Garzon} and J. J. {Ramos-Munoz} and J. M. {Lopez-Soler}},  booktitle={2017 IEEE International Conference on Communications Workshops (ICC Workshops)},   title={Optimized LTE data transmission procedures for IoT: Device side energy consumption analysis},   year={2017},  volume={},  number={},  pages={540-545},  abstract={The efficient deployment of Internet of Things (IoT) over cellular networks, such as Long Term Evolution (LTE) or the next generation 5G, entails several challenges. For massive IoT, reducing the energy consumption on the device side becomes essential. One of the main characteristics of massive IoT is small data transmissions. To improve the support of them, the 3GPP has included two novel optimizations in LTE: one of them based on the Control Plane (CP), and the other on the User Plane (UP). In this paper, we analyze the average energy consumption per data packet using these two optimizations compared to conventional LTE Service Request procedure. We propose an analytical model to calculate the energy consumption for each procedure based on a Markov chain. In the considered scenario, for large and small Inter-Arrival Times (IATs), the results of the three procedures are similar. While for medium IATs CP reduces the energy consumption per packet up to 87% due to its connection release optimization.},  keywords={Long Term Evolution;Energy consumption;Optimization;Data communication;3GPP;Context;Security},  doi={10.1109/ICCW.2017.7962714},  ISSN={2474-9133},  month={May}, project={5gcity}, pdf={https://digibug.ugr.es/handle/10481/68238}
    }
    close

  11. Servicio centralizado de proyección de material docente
    Jorge Navarro-Ortiz, Sandra Sendra, Pablo Ameigeiras, Angel de la Torre, Luz Garcia, Angel M. Gomez, Juan Manuel Lopez-Soler, Sonia Mota, Pablo Padilla, Jonathan Prados-Garzon, Javier Ramirez, Juan Jose Ramos-Munoz, Antonio Ruiz-Moya, Jose Carlos Segura
    V Jornadas de Innovación Educativa at XIII Jornadas de Ingeniería Telemática (JITEL 2017), 2017.
    "Servicio centralizado de proyección de material docente", Jorge Navarro-Ortiz, Sandra Sendra, Pablo Ameigeiras, Angel de la Torre, Luz Garcia, Angel M. Gomez, Juan Manuel Lopez-Soler, Sonia Mota, Pablo Padilla, Jonathan Prados-Garzon, Javier Ramirez, Juan Jose Ramos-Munoz, Antonio Ruiz-Moya, Jose Carlos Segura, "V Jornadas de Innovación Educativa at XIII Jornadas de Ingeniería Telemática (JITEL 2017)", 2017
    close
    @INPROCEEDINGS{jnavarrojitel17,  author={Navarro-Ortiz, Jorge and Sendra, Sandra and Ameigeiras, Pablo and de la Torre, Angel and Garcia, Luz and Gomez, Angel M. and Lopez-Soler, Juan Manuel and Mota, Sonia and Padilla, Pablo and Prados-Garzon, Jonathan and Ramirez, Javier and Ramos-Munoz, Juan Jose and Ruiz-Moya, Antonio and Segura, Jose Carlos},  booktitle={V Jornadas de Innovación Educativa at XIII Jornadas de Ingeniería Telemática (JITEL 2017)}, title={Servicio centralizado de proyección de material docente},   year={2017}, url={http://wpd.ugr.es/~jorgenavarro/publications/52-6508.pdf}}
    close

  12. Handover implementation in a 5G SDN-based mobile network architecture
    J. Prados-Garzon, O. Adamuz-Hinojosa, P. Ameigeiras, J. J. Ramos-Munoz, P. Andres-Maldonado, J. M. Lopez-Soler
    2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), pp. 1-6, September 2016, DOI: 10.1109/PIMRC.2016.7794936.
    "Handover implementation in a 5G SDN-based mobile network architecture", J. Prados-Garzon, O. Adamuz-Hinojosa, P. Ameigeiras, J. J. Ramos-Munoz, P. Andres-Maldonado, J. M. Lopez-Soler, "2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)", pp. 1-6, 2016. DOI: 10.1109/PIMRC.2016.7794936
    close
    Requirements for 5G mobile networks includes a higher flexibility, scalability, cost effectiveness and energy efficiency. Towards these goals, Software Defined Networking (SDN) and Network Functions Virtualization have been adopted in recent proposals for future mobile networks architectures because they are considered critical technologies for 5G. In this paper, we propose an X2-based handover implementation in an SDN-based and partially virtualized LTE architecture. Moreover, the architecture considered operates at link level, which provides lower latency and higher scalability. In our implementation, we use MPLS tunnels for user plane instead of GTP-U protocol, which introduces a significant overhead. To verify the correct operation of our system, we developed a simulator. It implements the messages exchange and processing of the primary network entities. Using this tool we measured the handover preparation and completion times, whose estimated values were roughly 6.94 ms and 8.31 ms, respectively, according to our experimental setup. These latencies meet the expected requirements concerning control plane delay budgets for 5G networks.
    close
    @INPROCEEDINGS{7794936,  author={J. {Prados-Garzon} and O. {Adamuz-Hinojosa} and P. {Ameigeiras} and J. J. {Ramos-Munoz} and P. {Andres-Maldonado} and J. M. {Lopez-Soler}},  booktitle={2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)},   title={Handover implementation in a 5G SDN-based mobile network architecture},   year={2016},  volume={},  number={},  pages={1-6},  abstract={Requirements for 5G mobile networks includes a higher flexibility, scalability, cost effectiveness and energy efficiency. Towards these goals, Software Defined Networking (SDN) and Network Functions Virtualization have been adopted in recent proposals for future mobile networks architectures because they are considered critical technologies for 5G. In this paper, we propose an X2-based handover implementation in an SDN-based and partially virtualized LTE architecture. Moreover, the architecture considered operates at link level, which provides lower latency and higher scalability. In our implementation, we use MPLS tunnels for user plane instead of GTP-U protocol, which introduces a significant overhead. To verify the correct operation of our system, we developed a simulator. It implements the messages exchange and processing of the primary network entities. Using this tool we measured the handover preparation and completion times, whose estimated values were roughly 6.94 ms and 8.31 ms, respectively, according to our experimental setup. These latencies meet the expected requirements concerning control plane delay budgets for 5G networks.},  keywords={Long Term Evolution;Handover;Mobile computing;5G mobile communication;Computer architecture;Handover;5G;SDN;NFV;virtualized LTE/EPC},  doi={10.1109/PIMRC.2016.7794936},  ISSN={2166-9589},  month={September}
    }
    close

  13. MME Support for M2M Communications Using Network Function Virtualization
    Pilar Andres-Maldonado, Pablo Ameigeiras, Jonathan Prados, Juan J. Ramos-Munoz, Juan M. Lopez-Soler
    The Twelfth Advanced International Conference on Telecommunications. AICT 2016. Valencia, Spain, May 2016.
    "MME Support for M2M Communications Using Network Function Virtualization", Pilar Andres-Maldonado, Pablo Ameigeiras, Jonathan Prados, Juan J. Ramos-Munoz, Juan M. Lopez-Soler, "The Twelfth Advanced International Conference on Telecommunications. AICT 2016. Valencia, Spain", ISBN 2308-4030/978-1-61208-473-2, 2016
    close
    @inproceedings{lopezsoler2016,
    author = {Andres-Maldonado, Pilar and Ameigeiras, Pablo and Prados, Jonathan and Ramos-Munoz, Juan J. and Lopez-Soler, Juan M.},
    booktitle = {The Twelfth Advanced International Conference on Telecommunications. AICT 2016. Valencia, Spain},
    year = {2016},
    month = {May},
    isbn = {2308-4030/978-1-61208-473-2},
    title = {MME Support for M2M Communications Using Network Function Virtualization},
    project =" AGINET",
    url = {https://www.researchgate.net/publication/305491037_MME_Support_for_M2M_Communications_Using_Network_Function_Virtualization}
    }
    close

  14. Reduced M2M signaling communications in 3GPP LTE and future 5G cellular networks
    P. Andres-Maldonado, P. Ameigeiras, J. Prados-Garzon, J. J. Ramos-Munoz, J. M. Lopez-Soler
    2016 Wireless Days (WD), pp. 1-3, March 2016, DOI: 10.1109/WD.2016.7461499.
    "Reduced M2M signaling communications in 3GPP LTE and future 5G cellular networks", P. Andres-Maldonado, P. Ameigeiras, J. Prados-Garzon, J. J. Ramos-Munoz, J. M. Lopez-Soler, "2016 Wireless Days (WD)", pp. 1-3, 2016. DOI: 10.1109/WD.2016.7461499
    close
    The increase of machine-to-machine (M2M) communications over cellular networks imposes new requirements and challenges that current networks have to handle with. Many M2M UEs (User Equipment) may send small infrequent data, which suppose a challenge for cellular networks not optimized for such traffic, where signaling load could increase significantly and cause congestion over the network. This paper evaluates current proposals to manage small transmissions over the Long Term Evolution (LTE) cellular network. We also propose a new Random Access-based Small IP packet Transmission (RASIPT) procedure for M2M UEs small data transmissions. Its main feature is data transfer without establishment of Radio Resource Control (RRC) connection to reduce signaling overhead. In our design, we assume a Software Defined Networking-based architecture for 5G system. When compared with current LTE scheme, our procedure reduces significantly the signaling load generated by M2M UEs small transmissions.
    close
    @INPROCEEDINGS{7461499,  author={P. {Andres-Maldonado} and P. {Ameigeiras} and J. {Prados-Garzon} and J. J. {Ramos-Munoz} and J. M. {Lopez-Soler}},  booktitle={2016 Wireless Days (WD)},   title={Reduced M2M signaling communications in 3GPP LTE and future 5G cellular networks},   year={2016},  volume={},  number={},  pages={1-3},  abstract={The increase of machine-to-machine (M2M) communications over cellular networks imposes new requirements and challenges that current networks have to handle with. Many M2M UEs (User Equipment) may send small infrequent data, which suppose a challenge for cellular networks not optimized for such traffic, where signaling load could increase significantly and cause congestion over the network. This paper evaluates current proposals to manage small transmissions over the Long Term Evolution (LTE) cellular network. We also propose a new Random Access-based Small IP packet Transmission (RASIPT) procedure for M2M UEs small data transmissions. Its main feature is data transfer without establishment of Radio Resource Control (RRC) connection to reduce signaling overhead. In our design, we assume a Software Defined Networking-based architecture for 5G system. When compared with current LTE scheme, our procedure reduces significantly the signaling load generated by M2M UEs small transmissions.},  keywords={5G mobile communication;Data communication;3GPP;Uplink;Wireless communication;Long Term Evolution;Context;machine to machine;small data transmission;SDT;SDN},  doi={10.1109/WD.2016.7461499},  ISSN={},  month={March}
    }
    close

  15. Latency evaluation of a virtualized MME
    J. Prados-Garzon, J. J. Ramos-Munoz, P. Ameigeiras, P. Andres-Maldonado, J. M. Lopez-Soler
    2016 Wireless Days (WD), pp. 1-3, March 2016, DOI: 10.1109/WD.2016.7461500.
    "Latency evaluation of a virtualized MME", J. Prados-Garzon, J. J. Ramos-Munoz, P. Ameigeiras, P. Andres-Maldonado, J. M. Lopez-Soler, "2016 Wireless Days (WD)", pp. 1-3, 2016. DOI: 10.1109/WD.2016.7461500
    close
    Network Virtualization is one of the key technologies for developing the future mobile networks. In this paper we propose an LTE virtualized Mobility Management Entity queue model to evaluate its service time for a given signaling workload. Additionally, we provide a compound data traffic model for the future mobile applications, and we predict theoretically the control workload that it will generate. Finally, we evaluate the virtualized Mobility Management Entity overall mean delay by simulation, providing insights for selecting the number of processing instances for a given number of users.
    close
    @INPROCEEDINGS{7461500,  author={J. {Prados-Garzon} and J. J. {Ramos-Munoz} and P. {Ameigeiras} and P. {Andres-Maldonado} and J. M. {Lopez-Soler}},  booktitle={2016 Wireless Days (WD)},   title={Latency evaluation of a virtualized MME},   year={2016},  volume={},  number={},  pages={1-3},  abstract={Network Virtualization is one of the key technologies for developing the future mobile networks. In this paper we propose an LTE virtualized Mobility Management Entity queue model to evaluate its service time for a given signaling workload. Additionally, we provide a compound data traffic model for the future mobile applications, and we predict theoretically the control workload that it will generate. Finally, we evaluate the virtualized Mobility Management Entity overall mean delay by simulation, providing insights for selecting the number of processing instances for a given number of users.},  keywords={Delays;Process control;Computational modeling;Cloud computing;Mathematical model;Iron;Wireless communication;virtualized MME;queue model;NFV;LTE},  doi={10.1109/WD.2016.7461500},  ISSN={},  month={March}
    }
    close

  16. Wireless and Multimedia Networking laboratory
    J. Prados-Garzon, P. Andres-Maldonado, P. Romero-Diaz, J. Navarro-Ortiz, J. J. Ramos-Munoz, P. Ameigeiras, P. Munoz-Luengo, S. Sendra, J. M. Lopez-Soler
    II Workshop on QoE, QoS on Multimedia Communications (QQCM'16), 2016.
    "Wireless and Multimedia Networking laboratory", J. Prados-Garzon, P. Andres-Maldonado, P. Romero-Diaz, J. Navarro-Ortiz, J. J. Ramos-Munoz, P. Ameigeiras, P. Munoz-Luengo, S. Sendra, J. M. Lopez-Soler, "II Workshop on QoE, QoS on Multimedia Communications (QQCM'16)", 2016
    close
    @Inproceedings{jpradosqqcm16,  author={J. {Prados-Garzon} and P. {Andres-Maldonado} and P. {Romero-Diaz} and J. {Navarro-Ortiz} and J. J. {Ramos-Munoz} and P. {Ameigeiras} and P. {Munoz-Luengo} and S. {Sendra} and J. M. {Lopez-Soler}},  booktitle={II Workshop on QoE, QoS on Multimedia Communications (QQCM'16)}, title={Wireless and Multimedia Networking laboratory},   year={2016}}
    close

  17. Diseño de una arquitectura para la red de acceso para 5G basada en SDN
    P. Ameigeiras, J. J. Ramos-Munoz, L. Schumacher, J. Prados-Garzon, J. Navarro-Ortiz, J. M. Lopez-Soler
    XII Jornadas de Ingeniería Telemática (JITEL 2015), 2015.
    "Diseño de una arquitectura para la red de acceso para 5G basada en SDN", P. Ameigeiras, J. J. Ramos-Munoz, L. Schumacher, J. Prados-Garzon, J. Navarro-Ortiz, J. M. Lopez-Soler, "XII Jornadas de Ingeniería Telemática (JITEL 2015)", 2015
    close
    @Inproceedings{pameigeirasjitel15,  author={P. {Ameigeiras} and J. J. {Ramos-Munoz} and L. {Schumacher} and J. {Prados-Garzon} and J. {Navarro-Ortiz} and J. M. {Lopez-Soler}},  booktitle={XII Jornadas de Ingeniería Telemática (JITEL 2015)}, title={Diseño de una arquitectura para la red de acceso para 5G basada en SDN},   year={2015}, url={http://wpd.ugr.es/~jorgenavarro/publications/jitel15_arquitectura5g.pdf}}
    close

  18. Wireless and Multimedia Networking (WiMuNet) laboratory
    J. Navarro-Ortiz, P. Ameigeiras, J. J. Ramos-Munoz, J. Prados-Garzon, J. M. Lopez-Soler
    XII Jornadas de Ingeniería Telemática (JITEL 2015), 2015.
    "Wireless and Multimedia Networking (WiMuNet) laboratory", J. Navarro-Ortiz, P. Ameigeiras, J. J. Ramos-Munoz, J. Prados-Garzon, J. M. Lopez-Soler, "XII Jornadas de Ingeniería Telemática (JITEL 2015)", 2015
    close
    @Inproceedings{jnavarrojitel15,  author={J. {Navarro-Ortiz} and P. {Ameigeiras} and J. J. {Ramos-Munoz} and J. {Prados-Garzon} and J. M. {Lopez-Soler}},  booktitle={XII Jornadas de Ingeniería Telemática (JITEL 2015)}, title={Wireless and Multimedia Networking (WiMuNet) laboratory},   year={2015}, url={http://wpd.ugr.es/~jorgenavarro/publications/jitel15_wimunet.pdf}}
    close

  19. NAPA: An algorithm to auto-tune unicast reliable communications over DDS
    Juan J. Martin-Carrascosa, Jose M- Lopez-Vega, Javier Povedano-Molina, and Juan J. Ramos-Muñoz, Juan M. Lopez-Soler
    XI Jornadas de Ingeniería Telemática (JITEL 2013). Granada, Spain. , October 2013.
    "NAPA: An algorithm to auto-tune unicast reliable communications over DDS", Juan J. Martin-Carrascosa, Jose M- Lopez-Vega, Javier Povedano-Molina, and Juan J. Ramos-Muñoz, Juan M. Lopez-Soler, "XI Jornadas de Ingeniería Telemática (JITEL 2013). Granada, Spain.
    ", ISBN 978-84-616-5597-7, 2013
    close
    @Inproceedings{lopezsoler2013,
    	title = {NAPA: An algorithm to auto-tune unicast reliable communications over DDS},
    	booktitle={XI Jornadas de Ingeniería Telemática (JITEL 2013). Granada, Spain.
    },
    	isbn = {978-84-616-5597-7},
    	author = {Juan J. Martin-Carrascosa and Jose M- Lopez-Vega and Javier Povedano-Molina and and Juan J. Ramos-Muñoz and Juan M. Lopez-Soler},
    	month = October,
    	year = {2013},
    	url = {http://dtstc.ugr.es/jitel2013/},
    	project = ""
    }
    close

  20. YouTube traffic detection and characteristics extraction
    J. Navarro-Ortiz, P. Ameigeiras, J. J. Ramos-Munoz, J. Prados-Garzon, J. M. Lopez-Soler
    XI Jornadas de Ingeniería Telemática (JITEL 2013), 2013.
    "YouTube traffic detection and characteristics extraction", J. Navarro-Ortiz, P. Ameigeiras, J. J. Ramos-Munoz, J. Prados-Garzon, J. M. Lopez-Soler, "XI Jornadas de Ingeniería Telemática (JITEL 2013)", 2013
    close
    @Inproceedings{jnavarrojitel13,  author={J. {Navarro-Ortiz} and P. {Ameigeiras} and J. J. {Ramos-Munoz} and J. {Prados-Garzon} and J. M. {Lopez-Soler}},  booktitle={XI Jornadas de Ingeniería Telemática (JITEL 2013)}, title={YouTube traffic detection and characteristics extraction},   year={2013}, url={http://wpd.ugr.es/~jorgenavarro/publications/jitel13_youtubedetection.pdf}}
    close

  21. Simulation-based performance study of YouTube service in 3G LTE
    J. Prados-Garzon, P. Ameigeiras, J. Navarro-Ortiz, J. M. Lopez-Soler
    2013 IEEE 14th International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM), pp. 1-3, 2013, DOI: 10.1109/WoWMoM.2013.6583422.
    "Simulation-based performance study of YouTube service in 3G LTE", J. Prados-Garzon, P. Ameigeiras, J. Navarro-Ortiz, J. M. Lopez-Soler, "2013 IEEE 14th International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM)", pp. 1-3, 2013. DOI: 10.1109/WoWMoM.2013.6583422
    close
    @Inproceedings{6583422,  author={J. {Prados-Garzon} and P. {Ameigeiras} and J. {Navarro-Ortiz} and J. M. {Lopez-Soler}},  booktitle={2013 IEEE 14th International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM)},   title={Simulation-based performance study of YouTube service in 3G LTE},   year={2013},  volume={},  number={},  pages={1-3},  doi={10.1109/WoWMoM.2013.6583422}}
    close

  22. DDS-enabled Cloud management support for fast task offloading
    A. Corradi, L. Foschini, J. Povedano-Molina, J. M. Lopez-Soler
    2012 IEEE Symposium on Computers and Communications (ISCC), pp. 000067-000074, July 2012, DOI: 10.1109/ISCC.2012.6249270.
    "DDS-enabled Cloud management support for fast task offloading", A. Corradi, L. Foschini, J. Povedano-Molina, J. M. Lopez-Soler, "2012 IEEE Symposium on Computers and Communications (ISCC)", pp. 000067-000074, 2012. DOI: 10.1109/ISCC.2012.6249270
    close
    Cloud computing has become an essential technology not only for web provisioning, but also in mobile scenarios. Mobile devices are usually resource constrained due to processing and power limitations, so typical applications are not easy portable. Battery draining and application performance (resource shortage) have a big impact on the experienced quality, so shifting applications and services to the Cloud may improve mobile user's satisfaction. However, available Cloud solutions are mostly focused on scenarios with slowly changing provisioning, which are unable to support and promptly react to short-term provisioning requests. To address the new scenario, this paper proposes a novel Cloud monitoring and management architecture based on the data-centric publish-subscribe Data Distribution Service (DDS) standard. We present not only an architecture proposal, but also a real prototype that we have deployed in our experimental testbed. The experimental results show that our architecture is able to support the scheduling of highly dynamic tasks in the Cloud while maintaining low overheads.
    close
    @INPROCEEDINGS{6249270,  author={A. {Corradi} and L. {Foschini} and J. {Povedano-Molina} and J. M. {Lopez-Soler}},  booktitle={2012 IEEE Symposium on Computers and Communications (ISCC)},   title={DDS-enabled Cloud management support for fast task offloading},   year={2012},  volume={},  number={},  pages={000067-000074},  abstract={Cloud computing has become an essential technology not only for web provisioning, but also in mobile scenarios. Mobile devices are usually resource constrained due to processing and power limitations, so typical applications are not easy portable. Battery draining and application performance (resource shortage) have a big impact on the experienced quality, so shifting applications and services to the Cloud may improve mobile user's satisfaction. However, available Cloud solutions are mostly focused on scenarios with slowly changing provisioning, which are unable to support and promptly react to short-term provisioning requests. To address the new scenario, this paper proposes a novel Cloud monitoring and management architecture based on the data-centric publish-subscribe Data Distribution Service (DDS) standard. We present not only an architecture proposal, but also a real prototype that we have deployed in our experimental testbed. The experimental results show that our architecture is able to support the scheduling of highly dynamic tasks in the Cloud while maintaining low overheads.},  keywords={Monitoring;Peer to peer computing;Computer architecture;Publish-subscribe;Proposals;Data models;Servers;Cloud monitoring;Cloud management;OpenStack;publish-subscribe;data-centric;DDS},  doi={10.1109/ISCC.2012.6249270},  ISSN={1530-1346},  month={July}}
    close

  23. Objetive and Perceptual Impact of TCP Dropping Policies on VoIP Flows
    Erika Patricia Alvarez-Flores, Juan José Ramos-Munoz, Jose M. Lopez-Vega, Juan Manuel Lopez-Soler
    The Fourth International Conferences on Advanced Service Computing (SERVICE COMPUTATION 2012). Nice, France. , July 2012.
    "Objetive and Perceptual Impact of TCP Dropping Policies on VoIP Flows", Erika Patricia Alvarez-Flores, Juan José Ramos-Munoz, Jose M. Lopez-Vega, Juan Manuel Lopez-Soler, "The Fourth International Conferences on Advanced Service Computing (SERVICE COMPUTATION 2012). Nice, France.
    ", ISBN 2308-3549 / 978-1-61208-215-8, 2012
    close
    @Inproceedings{lopezsoler2012,
    	title = {Objetive and Perceptual Impact of TCP Dropping Policies on VoIP Flows},
    	booktitle={The Fourth International Conferences on Advanced Service Computing (SERVICE COMPUTATION 2012). Nice, France.
    },
    	isbn = {2308-3549 / 978-1-61208-215-8},
    	author = {Erika Patricia Alvarez-Flores and Juan José Ramos-Munoz and Jose M. Lopez-Vega and Juan Manuel Lopez-Soler},
    	month = July,
    	year = {2012},
    	url = {http://www.thinkmind.org/index.php?view=article&articleid=service_computation_2012_4_30_10094},
    	project = ""
    }
    close

  24. Video Tester — A multiple-metric framework for video quality assessment over IP networks
    I. Ucar, J. Navarro-Ortiz, P. Ameigeiras, J. M. Lopez-Soler
    IEEE international Symposium on Broadband Multimedia Systems and Broadcasting, pp. 1-5, 2012, DOI: 10.1109/BMSB.2012.6264243.
    "Video Tester — A multiple-metric framework for video quality assessment over IP networks", I. Ucar, J. Navarro-Ortiz, P. Ameigeiras, J. M. Lopez-Soler, "IEEE international Symposium on Broadband Multimedia Systems and Broadcasting", pp. 1-5, 2012. DOI: 10.1109/BMSB.2012.6264243
    close
    @Inproceedings{6264243,  author={I. {Ucar} and J. {Navarro-Ortiz} and P. {Ameigeiras} and J. M. {Lopez-Soler}},  booktitle={IEEE international Symposium on Broadband Multimedia Systems and Broadcasting},   title={Video Tester — A multiple-metric framework for video quality assessment over IP networks},   year={2012},  volume={},  number={},  pages={1-5},  doi={10.1109/BMSB.2012.6264243}}
    close

  25. Algoritmo de Selección para Descarte en Esquemas AQM para un Doble Servicio Equitativo
    Erika Patricia Alvarez-Flores, Juan José Ramos-Munoz, Lorenia Cantó Ballesteros, Juan Manuel Lopez-Soler
    11 Congreso Nacional de Ingeniería Eléctrica y Electrónica (CONIEEM 2011) Yucatan, Mexico, September 2011.
    "Algoritmo de Selección para Descarte en Esquemas AQM para un Doble Servicio Equitativo", Erika Patricia Alvarez-Flores, Juan José Ramos-Munoz, Lorenia Cantó Ballesteros, Juan Manuel Lopez-Soler, "11 Congreso Nacional de Ingeniería Eléctrica y Electrónica (CONIEEM 2011)
    Yucatan, Mexico", 2011
    close
    @Inproceedings{lopezsoler2011b,
    	title = {Algoritmo de Selección para Descarte en Esquemas AQM para un Doble Servicio Equitativo},
    	booktitle={11 Congreso Nacional de Ingeniería Eléctrica y Electrónica (CONIEEM 2011)
    Yucatan, Mexico},
    	author = {Erika Patricia Alvarez-Flores and Juan José Ramos-Munoz and Lorenia Cantó Ballesteros and Juan Manuel Lopez-Soler},
    	month = September,
    	year = {2011},
    	url = {http://www.cesues.edu.mx/PDFS/investigacion_y_desarrollo/CONVOCATORIA_CONIEEM_2011.pdf},
    	pages = {},
    	project = ""
    }
    close

  26. An extensible DDS-based monitoring and intrusion detection system
    Fernando García Aranda, Javier Sanchez-Monedero, Juan M. Lopez-Soler
    Workshop on Real-time, Embedded and Enterprise-Scale Time-Critical Systems. Arlington, VA USA, March 2011.
    " An extensible DDS-based monitoring and intrusion detection system", Fernando García Aranda, Javier Sanchez-Monedero, Juan M. Lopez-Soler, "Workshop on Real-time, Embedded and Enterprise-Scale Time-Critical Systems. Arlington, VA USA", 2011
    close
    @Inproceedings{lopezsoler2011a,
    	title = { An extensible DDS-based monitoring and intrusion detection system},
    	booktitle={Workshop on Real-time, Embedded and Enterprise-Scale Time-Critical Systems. Arlington, VA USA},
    	author = {Fernando García Aranda and Javier Sanchez-Monedero and Juan M. Lopez-Soler},
    	month = March,
    	year = {2011},
    	project = ""
    }
    close

  27. EMDS: an Extensible Multimedia Distribution Service
    Javier Povedano-Molina, Jose M. Lopez-Vega, Juan M. Lopez-Soler
    Workshop on Real-time, Embedded and Enterprise-Scale Time-Critical Systems. Arlington, VA USA, May 2010.
    " EMDS: an Extensible Multimedia Distribution Service ", Javier Povedano-Molina, Jose M. Lopez-Vega, Juan M. Lopez-Soler, "Workshop on Real-time, Embedded and Enterprise-Scale Time-Critical Systems. Arlington, VA USA", 2010
    close
    @Inproceedings{lopezsoler2010d,
    	title = { EMDS: an Extensible Multimedia Distribution Service },
    	booktitle={Workshop on Real-time, Embedded and Enterprise-Scale Time-Critical Systems. Arlington, VA USA},
    	author = {Javier Povedano-Molina and Jose M. Lopez-Vega and Juan M. Lopez-Soler},
    	month = May,
    	year = {2010},
    	project = ""
    }
    close

  28. DDS/SIP Interworking: A DDS-SIP Gateway
    Jose M. Lopez-Vega, Javier Povedano-Molina, Juan M. Lopez-Soler
    Workshop on Real-time, Embedded and Enterprise-Scale Time-Critical Systems. Arlington, VA USA, May 2010.
    "DDS/SIP Interworking: A DDS-SIP Gateway", Jose M. Lopez-Vega, Javier Povedano-Molina, Juan M. Lopez-Soler, "Workshop on Real-time, Embedded and Enterprise-Scale Time-Critical Systems. Arlington, VA USA", 2010
    close
    @Inproceedings{lopezsoler2010c,
    	title = {DDS/SIP Interworking: A DDS-SIP Gateway},
    	booktitle={Workshop on Real-time, Embedded and Enterprise-Scale Time-Critical Systems. Arlington, VA USA},
    	author = {Jose M. Lopez-Vega and Javier Povedano-Molina and Juan M. Lopez-Soler},
    	month = May,
    	year = {2010},
    	project = ""
    }
    close

  29. Quality of experience based resource sharing in IEEE 802.11e HCCA
    J. Navarro-Ortiz, J. M. Lopez-Soler, G. Stea
    2010 European Wireless Conference (EW), pp. 454-461, April 2010, DOI: 10.1109/EW.2010.5483493.
    "Quality of experience based resource sharing in IEEE 802.11e HCCA", J. Navarro-Ortiz, J. M. Lopez-Soler, G. Stea, "2010 European Wireless Conference (EW)", pp. 454-461, 2010. DOI: 10.1109/EW.2010.5483493
    close
    When dealing with multiple traffic classes, it is often difficult to define a single resource sharing criterion. For instance, VoIP flows require low delay and losses, whereas FTP traffic requires high throughput. In this paper, we propose to use the Mean Opinion Score (MOS) as a unifying criterion, and to share resources so as to keep the MOS of the various flows above an acceptable threshold whenever possible. We present four different resource sharing policies: Preemptive, Non-preemptive, MOS-driven Fairness and Revenue Optimization. We analyze the different approaches through simulation, comparing their performance in terms of end-user Quality of Experience and revenue. Our results show that our scheme reacts to the changing traffic scenarios so as to achieve the pre-specified objective, thus achieving an effective exploitation of the limited bandwidth resources.
    close
    @INPROCEEDINGS{5483493,  author={J. {Navarro-Ortiz} and J. M. {Lopez-Soler} and G. {Stea}},  booktitle={2010 European Wireless Conference (EW)},   title={Quality of experience based resource sharing in IEEE 802.11e HCCA},   year={2010},  volume={},  number={},  pages={454-461},  abstract={When dealing with multiple traffic classes, it is often difficult to define a single resource sharing criterion. For instance, VoIP flows require low delay and losses, whereas FTP traffic requires high throughput. In this paper, we propose to use the Mean Opinion Score (MOS) as a unifying criterion, and to share resources so as to keep the MOS of the various flows above an acceptable threshold whenever possible. We present four different resource sharing policies: Preemptive, Non-preemptive, MOS-driven Fairness and Revenue Optimization. We analyze the different approaches through simulation, comparing their performance in terms of end-user Quality of Experience and revenue. Our results show that our scheme reacts to the changing traffic scenarios so as to achieve the pre-specified objective, thus achieving an effective exploitation of the limited bandwidth resources.},  keywords={Resource management;Bandwidth;Traffic control;Telecommunication traffic;Scheduling algorithm;Measurement;Delay;Throughput;Protocols;3G mobile communication;802.11e;HCCA;Quality of Experience;Scheduling;Resource allocation policies},  doi={10.1109/EW.2010.5483493},  ISSN={},  month={April}}
    close

  30. Políticas de QoS en una Plataforma de Trabajo Colaborativo sobre Middleware DDS
    Jose M. Lopez-Vega, Javier Povedano Molina, Javier Sanchez-Monedero, Juan M. Lopez-Soler
    XIII Jornadas de Tiempo Real JTR2010. Granada, Spain, pp. 143-154, February 2010.
    "Políticas de QoS en una Plataforma de Trabajo Colaborativo sobre Middleware DDS", Jose M. Lopez-Vega, Javier Povedano Molina, Javier Sanchez-Monedero, Juan M. Lopez-Soler, "XIII Jornadas de Tiempo Real JTR2010. Granada, Spain", ISBN 978?84?92757?51?0, pp. 143-154, 2010
    close
    @Inproceedings{lopezsoler2010a,
    	title = {Políticas de QoS en una Plataforma de Trabajo Colaborativo sobre Middleware DDS},
    	booktitle={XIII Jornadas de Tiempo Real JTR2010. Granada, Spain},
    	isbn = {978?84?92757?51?0},
    	author = {Jose M. Lopez-Vega and Javier Povedano Molina and Javier Sanchez-Monedero and Juan M. Lopez-Soler},
    	month = February,
    	year = {2010},
    	pages = {143-154},
    	project = ""
    }
    close

  31. Instant Messaging Based Interface for Data Distribution Service
    Javier Povedano Molina, Jose M. Lopez-Vega, Javier Sanchez-Monedero, Juan M. Lopez-Soler
    XIII Jornadas de Tiempo Real JTR2010. Granada, Spain, pp. 223-330, February 2010.
    " Instant Messaging Based Interface for Data Distribution Service", Javier Povedano Molina, Jose M. Lopez-Vega, Javier Sanchez-Monedero, Juan M. Lopez-Soler, "XIII Jornadas de Tiempo Real JTR2010. Granada, Spain", ISBN 978-84-92757-51-0, pp. 223-330, 2010
    close
    @Inproceedings{lopezsoler2010b,
    	title = { Instant Messaging Based Interface for Data Distribution Service},
    	booktitle={XIII Jornadas de Tiempo Real JTR2010. Granada, Spain},
    	isbn = {978-84-92757-51-0},
    	author = {Javier Povedano Molina and Jose M. Lopez-Vega and Javier Sanchez-Monedero and Juan M. Lopez-Soler},
    	month = February,
    	year = {2010},
    	pages = {223-330},
    	project = ""
    }
    close

  32. QoE Evaluation of Scheduling Algorithms for NRT Services in LTE
    Pablo Ameigeiras, Juan J. Ramos-Munoz, Jorge Navarro-Ortiz, Juan Ramiro-Moreno, Juan Manuel Lopez-Soler
    ICT-MobileSummit 2009. Santander, Spain, June 2009.
    "QoE Evaluation of Scheduling Algorithms for NRT Services in LTE", Pablo Ameigeiras, Juan J. Ramos-Munoz, Jorge Navarro-Ortiz, Juan Ramiro-Moreno, Juan Manuel Lopez-Soler, "ICT-MobileSummit 2009. Santander, Spain", ISBN 978-1-905824-12-0, 2009
    close
    @Inproceedings{lopezsoler2009,
    	title = {QoE Evaluation of Scheduling Algorithms for NRT Services in LTE},
    	booktitle={ICT-MobileSummit 2009. Santander, Spain},
    	url = {http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.453.4750},
    	author = {Pablo Ameigeiras and Juan J. Ramos-Munoz and Jorge Navarro-Ortiz and Juan Ramiro-Moreno and Juan Manuel Lopez-Soler},
    	month = June,
    	year = {2009},
    	isbn={978-1-905824-12-0},
    	project = ""
    }
    close

  33. QoS Policies for Audio/Video Distribution over DDS Middleware
    Jose M. Lopez-Vega, Javier Sánchez Monedero, Javier Povedano Molina, Juan M. López-Soler
    Workshop on Distributed Object Computing for Real-Time and Embedded Systems. Arlington, VA USA, July 2008.
    "QoS Policies for Audio/Video Distribution over DDS Middleware", Jose M. Lopez-Vega, Javier Sánchez Monedero, Javier Povedano Molina, Juan M. López-Soler, "Workshop on Distributed Object Computing for Real-Time and Embedded Systems. Arlington, VA USA", 2008
    close
    @Inproceedings{lopezsoler2008b,
    author = {Jose M. Lopez-Vega and Javier Sánchez Monedero and Javier Povedano Molina and Juan M. López-Soler},
    year = {2008},
    month = {July},
    title = {QoS Policies for Audio/Video Distribution over DDS Middleware},
    url = {https://www.researchgate.net/publication/265172718_QoS_Policies_for_AudioVideo_Distribution_Over_DDS_Middleware},
    	booktitle={Workshop on Distributed Object Computing for Real-Time and Embedded Systems. Arlington, VA USA}
    }
    close

  34. An XML-based Approach to the Configuration and Deployment of DDS Applications
    Javier Sánchez Monedero, Jose M. Lopez-Vega, Javier Povedano Molina, Juan M. López-Soler
    Workshop on Distributed Object Computing for Real-Time and Embedded Systems. Arlington, VA USA, July 2008.
    "An XML-based Approach to the Configuration and Deployment of DDS Applications", Javier Sánchez Monedero, Jose M. Lopez-Vega, Javier Povedano Molina, Juan M. López-Soler, "Workshop on Distributed Object Computing for Real-Time and Embedded Systems. Arlington, VA USA", 2008
    close
    @Inproceedings{lopezsoler2008a,
    author = {Javier Sánchez Monedero and Jose M. Lopez-Vega and Javier Povedano Molina and Juan M. López-Soler},
    year = {2008},
    month = {July},
    pages = {},
    title = {An XML-based Approach to the Configuration and Deployment of DDS Applications},
    url = {https://www.researchgate.net/profile/Javier-Sanchez-Monedero/publication/265172586_An_XML-Based_Approach_to_the_Configuration_and_Deployment_of_DDS_Applications/links/5551dade08ae739bdb92611d/An-XML-Based-Approach-to-the-Configuration-and-Deployment-of-DDS-Applications.pdf},
    	booktitle={Workshop on Distributed Object Computing for Real-Time and Embedded Systems. Arlington, VA USA}
    }
    close

  35. Diseño e Implantación de un Laboratorio para la Docencia de Redes Telemáticas
    Gabriel Maciá Fernández, Jesús E. Díaz Verdejo, Pedro García Teodoro, Juan M. López Soler, Juan José Ramos Muñoz, Francisco Jesus De Toro Negro, Pablo Ameigeiras Gutierrez, Jorge Navarro-Ortiz
    VI Jornadas de Ingeniería Telemática. Málaga, Spain, pp. 593-596, September 2007.
    "Diseño e Implantación de un Laboratorio para la Docencia de Redes Telemáticas", Gabriel Maciá Fernández, Jesús E. Díaz Verdejo, Pedro García Teodoro, Juan M. López Soler, Juan José Ramos Muñoz, Francisco Jesus De Toro Negro, Pablo Ameigeiras Gutierrez, Jorge Navarro-Ortiz, "VI Jornadas de Ingeniería Telemática. Málaga, Spain", pp. 593-596, 2007
    close
    @Inproceedings{lopezSoler2007a,
    	title = {Diseño e Implantación de un Laboratorio para la Docencia de Redes Telemáticas},
    	booktitle={VI Jornadas de Ingeniería Telemática. Málaga, Spain},
    	isbn = {},
    	url = {http://},
    	urldate = {},
    	author = {Gabriel Maciá Fernández and Jesús E. Díaz Verdejo and  Pedro García Teodoro and  Juan M. López Soler and  Juan José Ramos Muñoz and  Francisco Jesus De Toro Negro and Pablo Ameigeiras Gutierrez and  Jorge Navarro-Ortiz},
    	month = September,
    	year = {2007},
    	pages = {593-596},
    	project = "",
    	url={http://wpd.ugr.es/~jorgenavarro/publications/jitel07_laboratorio.pdf}
    }
    close

  36. Session Initiation and Management Protocol for Call-Centers (Simpler)
    Francisco Ángel García Valverde, Manuel Díaz García, Juan José Ramos Muñoz, Juan Manuel López Soler
    VI Jornadas de Ingeniería Telemática. Málaga, Spain, pp. 513-519, September 2007.
    "Session Initiation and Management Protocol for Call-Centers (Simpler)", Francisco Ángel García Valverde, Manuel Díaz García, Juan José Ramos Muñoz, Juan Manuel López Soler, "VI Jornadas de Ingeniería Telemática. Málaga, Spain", pp. 513-519, 2007
    close
    @Inproceedings{lopezsoler2007b,
    	title = {Session Initiation and Management Protocol for Call-Centers (Simpler)},
    	booktitle={VI Jornadas de Ingeniería Telemática. Málaga, Spain},
    	author = {Francisco Ángel García Valverde and  Manuel Díaz García and  Juan José Ramos Muñoz and  Juan Manuel López Soler},
    	month = September,
    	year = {2007},
    	pages = {513-519},
    	project = ""
    }
    close

  37. Scalable DDS Discovery Protocols Based on Bloom Filters
    Javier Sánchez-Monedero, Javier Povedano-Molina, Lopez-Soler Juan M.
    Workshop on Distributed Object Computing for Real-Time and Embedded Systems. Arlington, VA USA, July 2007.
    "Scalable DDS Discovery Protocols Based on Bloom Filters", Javier Sánchez-Monedero, Javier Povedano-Molina, Lopez-Soler Juan M., "Workshop on Distributed Object Computing for Real-Time and Embedded Systems. Arlington, VA USA", 2007
    close
    @Inproceedings{lopezSoler2007c,
    author = {Sánchez-Monedero, Javier and Povedano-Molina, Javier and Lopez-Soler Juan M.},
    year = {2007},
    month = {July},
    pages = {},
    title = {Scalable DDS Discovery Protocols Based on Bloom Filters},
    url = {https://www.researchgate.net/publication/237532369_Scalable_DDS_Discovery_Protocols_Based_on_Bloom_Filters},
    	booktitle={Workshop on Distributed Object Computing for Real-Time and Embedded Systems. Arlington, VA USA}
    }
    close

  38. BOOTES-IR: a robotic nIR astronomical observatory devoted to follow-up of transient phenomena
    A. J. Castro-Tirado, R. Cunniffe, A. de Ugarte Postigo, M. Jelínek, S. Vitek, P. Kubánek, J. Gorosabel, S. Castillo Carrión, T. J. Mateo Sanguino, A. Riva, P. Conconi, V. di Caprio, F. Zerbi, P. Amado, C. Cárdenas, A. Claret, S. Guziy, S. Martín-Ruiz, M. A. Sánchez, P. García Teodoro, J. M. Castro Cerón, J. Díaz Verdejo, R. Hudec, J. M. Lopez-Soler, J. Á. Berná Galiano, J. Casares, J. Fabregat, P. Páta, C. Sánchez Fernández, M. D. Sabau-Graziati, J. M. Trigo-Rodríguez, F. Vitali
    Ground-based and Airborne Telescopes, pp. 170-179, 2006, DOI: 10.1117/12.671579.
    "BOOTES-IR: a robotic nIR astronomical observatory devoted to follow-up of transient phenomena", A. J. Castro-Tirado, R. Cunniffe, A. de Ugarte Postigo, M. Jelínek, S. Vitek, P. Kubánek, J. Gorosabel, S. Castillo Carrión, T. J. Mateo Sanguino, A. Riva, P. Conconi, V. di Caprio, F. Zerbi, P. Amado, C. Cárdenas, A. Claret, S. Guziy, S. Martín-Ruiz, M. A. Sánchez, P. García Teodoro, J. M. Castro Cerón, J. Díaz Verdejo, R. Hudec, J. M. Lopez-Soler, J. Á. Berná Galiano, J. Casares, J. Fabregat, P. Páta, C. Sánchez Fernández, M. D. Sabau-Graziati, J. M. Trigo-Rodríguez, F. Vitali, "Ground-based and Airborne Telescopes", pp. 170-179, 2006. DOI: 10.1117/12.671579
    close
    "BOOTES-IR" is the extension of the BOOTES experiment, which has been operating in Southern Spain since
    1998, to the near-infrared (nIR). The goal is to follow up the early stage of the gamma ray burst (GRB)
    afterglow emission in the nIR, as BOOTES does already at optical wavelengths. The scientific case that drives
    the BOOTES-IR performance is the study of GRBs with the support of spacecraft like HETE-2, INTEGRAL and
    SWIFT (and GLAST in the future). Given that the afterglow emission in both, the nIR and the optical, in the
    instances immediately following a GRB, is extremely bright (reached V = 8.9 in one case), it should be possible
    to detect this prompt emission at nIR wavelengths too. Combined observations by BOOTES-IR and BOOTES-1
    and BOOTES-2 since 2006 can allow for real time identification of trustworthy candidates to have a ultra-high
    redshift (z > 6). It is expected that, few minutes after a GRB, the nIR magnitudes be H ~ 10-15, hence very
    high quality spectra can be obtained for objects as far as z = 10 by much larger ground-based telescopes. A
    significant fraction of observing time will be available for other scientific projects of interest, objects relatively
    bright and variable, like Solar System objects, brown dwarfs, variable stars, planetary nebulae, compact objects
    in binary systems and blazars.
    close
    @inproceedings{castro06,
    author = {A. J. Castro-Tirado and R. Cunniffe and A. de Ugarte Postigo and M. Jelínek and S. Vitek and P. Kubánek and J. Gorosabel and S. Castillo Carrión and T. J. Mateo Sanguino and A. Riva and P. Conconi and V. di Caprio and F. Zerbi and P. Amado and C. Cárdenas and A. Claret and S. Guziy and S. Martín-Ruiz and M. A. Sánchez and P. García Teodoro and J. M. Castro Cerón and J. Díaz Verdejo and R. Hudec and J. M. Lopez-Soler and J. Á. Berná Galiano and J. Casares and J. Fabregat and P. Páta and C. Sánchez Fernández and M. D. Sabau-Graziati and J. M. Trigo-Rodríguez and F. Vitali},
    title = {{BOOTES-IR: a robotic nIR astronomical observatory devoted to follow-up of transient phenomena}},
    volume = {6267},
    booktitle = {Ground-based and Airborne Telescopes},
    editor = {Larry M. Stepp},
    organization = {International Society for Optics and Photonics},
    publisher = {SPIE},
    pages = {170-179},
    abstract = {"BOOTES-IR" is the extension of the BOOTES experiment, which has been operating in Southern Spain since
    1998, to the near-infrared (nIR). The goal is to follow up the early stage of the gamma ray burst (GRB)
    afterglow emission in the nIR, as BOOTES does already at optical wavelengths. The scientific case that drives
    the BOOTES-IR performance is the study of GRBs with the support of spacecraft like HETE-2, INTEGRAL and
    SWIFT (and GLAST in the future). Given that the afterglow emission in both, the nIR and the optical, in the
    instances immediately following a GRB, is extremely bright (reached V = 8.9 in one case), it should be possible
    to detect this prompt emission at nIR wavelengths too. Combined observations by BOOTES-IR and BOOTES-1
    and BOOTES-2 since 2006 can allow for real time identification of trustworthy candidates to have a ultra-high
    redshift (z > 6). It is expected that, few minutes after a GRB, the nIR magnitudes be H ~ 10-15, hence very
    high quality spectra can be obtained for objects as far as z = 10 by much larger ground-based telescopes. A
    significant fraction of observing time will be available for other scientific projects of interest, objects relatively
    bright and variable, like Solar System objects, brown dwarfs, variable stars, planetary nebulae, compact objects
    in binary systems and blazars.},
    keywords = {Robotic telescopes, telescope software, near-IR instrumentation, cryogenics},
    year = {2006},
    doi = {10.1117/12.671579},
    URL = {https://doi.org/10.1117/12.671579}}
    close

  39. Fuzzy-Genetic Methodology for Web-Based Computed Aided Diagnosis in Medical Applications
    Francisco Jesus De Toro Negro, Javier Aroba Péez, Juan M. López-Soler
    Computational Intelligence, Theory and Applications. Springer, Berlin, Heidelberg, pp. 201-213, 2006, DOI: https://doi.org/10.1007/3-540-34783-6_21.
    "Fuzzy-Genetic Methodology for Web-Based Computed Aided Diagnosis in Medical Applications", Francisco Jesus De Toro Negro, Javier Aroba Péez, Juan M. López-Soler, "Computational Intelligence, Theory and Applications. Springer, Berlin, Heidelberg", ISBN 978-3-540-34780-4, pp. 201-213, 2006. DOI: https://doi.org/10.1007/3-540-34783-6_21
    close
    @Inproceedings{lopezsoler2006,
    	title = {Fuzzy-Genetic Methodology for Web-Based Computed Aided Diagnosis in Medical Applications},
    	booktitle={Computational Intelligence, Theory and Applications. Springer, Berlin, Heidelberg},
    	isbn = {978-3-540-34780-4},
    	url = {https://link.springer.com/chapter/10.1007/3-540-34783-6_21},
    	author = {Francisco Jesus De Toro Negro and Javier Aroba Péez and Juan M. López-Soler},
    	year = {2006},
    	pages = {201-213},
    	project = "",
    	doi = {https://doi.org/10.1007/3-540-34783-6_21}
    }
    close

  40. Efficient Allocation for VoIP Packet Losses Detection Services in Programmable and Active Networks
    J. J. Ramos-Munoz, J. M. Lopez-Soler
    Joint International Conference on Autonomic and Autonomous Systems and International Conference on Networking and Services - (icas-isns'05), pp. 52, October 2005, DOI: 10.1109/ICAS-ICNS.2005.47.
    "Efficient Allocation for VoIP Packet Losses Detection Services in Programmable and Active Networks", J. J. Ramos-Munoz, J. M. Lopez-Soler, "Joint International Conference on Autonomic and Autonomous Systems and International Conference on Networking and Services - (icas-isns'05)", ISBN 0-7695-2450-8, pp. 52, 2005. DOI: 10.1109/ICAS-ICNS.2005.47
    close
    @INPROCEEDINGS{lopezsoler2005b,
    author = {J. J. Ramos-Munoz and J. M. Lopez-Soler},
    booktitle = {Joint International Conference on Autonomic and Autonomous Systems and International Conference on Networking and Services - (icas-isns'05)},
    title = {Efficient Allocation for VoIP Packet Losses Detection Services in Programmable and Active Networks},
    year = {2005},
    pages = {52},
    doi = {10.1109/ICAS-ICNS.2005.47},
    url = {https://doi.ieeecomputersociety.org/10.1109/ICAS-ICNS.2005.47},
    publisher = {IEEE Computer Society},
    address = {Los Alamitos, CA, USA},
    month = {October},
    isbn ={0-7695-2450-8}
    }
    close

  41. Ubicación Eficiente de Servicios de Detección de Pérdidas para VOIP en Redes Programables y de Recubrimiento
    Juan José Ramos Muñoz, Juan M. López-Soler
    V Jornadas de Ingeniería Telemática, Vigo, Spain. JITEL 2005, pp. 321-328, 2005.
    "Ubicación Eficiente de Servicios de Detección de Pérdidas para VOIP en Redes Programables y de Recubrimiento", Juan José Ramos Muñoz, Juan M. López-Soler, "V Jornadas de Ingeniería Telemática, Vigo, Spain. JITEL 2005", ISBN 84-8408-346-2, pp. 321-328, 2005
    close
    @Inproceedings{lopezsoler2005a,
    	title = {Ubicación Eficiente de Servicios de Detección de Pérdidas para VOIP en Redes Programables y de Recubrimiento},
    	booktitle={V Jornadas de Ingeniería Telemática, Vigo, Spain. JITEL 2005},
    	isbn = {84-8408-346-2},
    	author = {Juan José Ramos Muñoz and Juan M. López-Soler},
    	year = {2005},
    	pages = {321-328},
    	project = ""
    }
    close

  42. Low Delay Multiflow Block Interleavers for Real-Time Audio Streaming
    Juan J. Ramos-Muñoz, Juan M. Lopez-Soler
    Networking - ICN 2005, pp. 909-916, 2005.
    "Low Delay Multiflow Block Interleavers for Real-Time Audio Streaming", Juan J. Ramos-Muñoz, Juan M. Lopez-Soler, "Networking - ICN 2005", ISBN 978-3-540-31956-6, pp. 909-916, 2005
    close
    In spite of the Internet design principle of putting the complexity on the end-to-end entities, this work contributes to demonstrate what benefits can be expected by adding some processing capabilities to the network nodes for the class of interactive audio streaming applications. In particular, we deal with the bursty-error-prone nature of the Internet by proposing and evaluating a new multiflow block interleaver algorithm. After the conducted simulations, we show that our algorithm can efficiently mitigate the negative impact of long bursts. And what it is more, it is achieved by fulfilling the end-to-end audio time constraint requirements.
    close
    @InProceedings{ramos05,
    author="Ramos-Muñoz, Juan J.
    and Lopez-Soler, Juan M.",
    editor="Lorenz, Pascal
    and Dini, Petre",
    title="Low Delay Multiflow Block Interleavers for Real-Time Audio Streaming",
    booktitle="Networking - ICN 2005",
    year="2005",
    publisher="Springer Berlin Heidelberg",
    address="Berlin, Heidelberg",
    pages="909-916",
    abstract="In spite of the Internet design principle of putting the complexity on the end-to-end entities, this work contributes to demonstrate what benefits can be expected by adding some processing capabilities to the network nodes for the class of interactive audio streaming applications. In particular, we deal with the bursty-error-prone nature of the Internet by proposing and evaluating a new multiflow block interleaver algorithm. After the conducted simulations, we show that our algorithm can efficiently mitigate the negative impact of long bursts. And what it is more, it is achieved by fulfilling the end-to-end audio time constraint requirements.",
    isbn="978-3-540-31956-6"}
    close

  43. Integral Multimedia System For Non-Presential Teacher-Student Advisory Through Internet
    Jose Luis Castro López, Pedro García Teodoro, Juan Manuel Estévez Tapiador, Jesús E. Díaz Verdejo, Juan Manuel López Soler, Juan José Ramos Muñoz
    Education and Information Systems, technologies and Applications. EISTA 2004. Florida, USA, July 2004.
    "Integral Multimedia System For Non-Presential Teacher-Student Advisory Through Internet", Jose Luis Castro López, Pedro García Teodoro, Juan Manuel Estévez Tapiador, Jesús E. Díaz Verdejo, Juan Manuel López Soler, Juan José Ramos Muñoz, "Education and Information Systems, technologies and Applications. EISTA 2004. Florida, USA", 2004
    close
    @Inproceedings{lopezsoler2004,
    	title = {Integral Multimedia System For Non-Presential Teacher-Student Advisory Through Internet},
    	booktitle={Education and Information Systems, technologies and Applications. EISTA 2004. Florida, USA},
    	author = {Jose Luis Castro López and Pedro García Teodoro and Juan Manuel Estévez Tapiador and Jesús E. Díaz Verdejo and Juan Manuel López Soler and Juan José Ramos Muñoz},
    	month = July,
    	year = {2004},
    	project = ""
    }
    close

  44. Detección activa de pérdidas de paquetes en flujos de audio en tiempo real
    Juan José Ramos Muñoz, Juan Francisco Nuñez Negrillo, Juan M. López-Soler
    IV Jornadas de Ingeniería Telemática JITEL 2003. Las Palmas de Gran Canaria, Spain, September 2003.
    "Detección activa de pérdidas de paquetes en flujos de audio en tiempo real", Juan José Ramos Muñoz, Juan Francisco Nuñez Negrillo, Juan M. López-Soler, "IV Jornadas de Ingeniería Telemática JITEL 2003. Las Palmas de Gran Canaria, Spain", ISBN 84 96131 38 6, 2003
    close
    @Inproceedings{lopezsoler2003a,
    	title = {Detección activa de pérdidas de paquetes en flujos de audio en tiempo real},
    	booktitle={IV Jornadas de Ingeniería Telemática JITEL 2003. Las Palmas de Gran Canaria, Spain},
    	isbn = {84 96131 38 6},
    	author = {Juan José Ramos Muñoz and Juan Francisco Nuñez Negrillo and Juan M. López-Soler},
    	month = September ,
    	year = {2003},
    	pages = {},
    	project = ""
    }
    close

  45. E-Tutor: A Videoconference-Based System For Teacher-Student Advisory
    Jesús Rodríguez-Peñas, Pedro García-Teodoro, and Jesús Esteban Díaz-Verdejo, Juan Manuel López-Soler
    International Conference on Network Universities and E-learning. Valencia, Spain, May 2003.
    "E-Tutor: A Videoconference-Based System For Teacher-Student Advisory", Jesús Rodríguez-Peñas, Pedro García-Teodoro, and Jesús Esteban Díaz-Verdejo, Juan Manuel López-Soler, "International Conference on Network Universities and E-learning. Valencia, Spain", ISBN 84-9705-369-9, 2003
    close
    @Inproceedings{lopezsoler2003b,
    	title = {E-Tutor: A Videoconference-Based System For Teacher-Student Advisory},
    	booktitle={International Conference on Network Universities and E-learning. Valencia, Spain},
    	isbn = {84-9705-369-9},
    	author = {Jesús Rodríguez-Peñas and Pedro García-Teodoro, and and Jesús Esteban Díaz-Verdejo and Juan Manuel López-Soler},
    	month = May,
    	year = {2003},
    	project = ""
    }
    close

  46. A New Method for Testing Dialogue Systems Based on Simulations of Real-World Conditions
    Ramón López-Cózar, Ángel Torre, José Segura, Antonio Rubio, Juan M. Lopez-Soler
    7th International Conference on Spoken Language Processing, ICSLP2002 - INTERSPEECH 2002, Denver, Colorado, USA, September 2002.
    "A New Method for Testing Dialogue Systems Based on Simulations of Real-World Conditions", Ramón López-Cózar, Ángel Torre, José Segura, Antonio Rubio, Juan M. Lopez-Soler, "7th International Conference on Spoken Language Processing, ICSLP2002 - INTERSPEECH 2002, Denver, Colorado, USA", ISBN 1-876346-40-X, 2002
    close
    @inproceedings{lopezsoler2002b,
    author = {López-Cózar, Ramón and Torre, Ángel and Segura, José and Rubio, Antonio and Lopez-Soler, Juan M.},
    year = {2002},
    month = {September},
    title = {A New Method for Testing Dialogue Systems Based on Simulations of Real-World Conditions},
    booktitle={7th International Conference on Spoken Language Processing, ICSLP2002 - INTERSPEECH 2002, Denver, Colorado, USA},
    isbn = {1-876346-40-X}
    }
    close

  47. Validación de un Sistema de Diálogo Mediante el Uso de Diferentes Umbrales de Poda en el Proceso de Reconocimiento Automático de Voz
    R. López-Cózar, A. J. Rubio, J. E. Díaz-Verdejo, J. M. López-Soler
    Revista Procesamiento del Lenguaje Natural, nº 29. ISSN 1135-5948, pp. 205-211, 2002.
    "Validación de un Sistema de Diálogo Mediante el Uso de Diferentes Umbrales de Poda en el Proceso de Reconocimiento Automático de Voz", R. López-Cózar, A. J. Rubio, J. E. Díaz-Verdejo, J. M. López-Soler, "Revista Procesamiento del Lenguaje Natural, nº 29. ISSN 1135-5948", pp. 205-211, 2002
    close
    @Inproceedings{lopezsoler2002a,
    	title = {Validación de un Sistema de Diálogo Mediante el Uso de Diferentes Umbrales de Poda en el Proceso de Reconocimiento Automático de Voz},
    	booktitle={Revista Procesamiento del Lenguaje Natural, nº 29. ISSN 1135-5948},
    	author = {R. López-Cózar and A. J. Rubio and J. E. Díaz-Verdejo and J. M. López-Soler},
    	year = {2002},
    	pages = {205-211},
    	project = ""
    }
    close

  48. Evaluación de un Modelo Publicación-Subscripción para Aplicaciones de Tiempo-Real en una red de área Local
    Juan M. López-Soler, José Luis Castillo Ramírez, Gerardo Pardo-Castellote
    III Jornadas de Ingeniería Telemática JITEL-2001. Barcelona, Spain. I.S.B.N. 84-7653-783-2, pp. 535-536, September 2001.
    "Evaluación de un Modelo Publicación-Subscripción para Aplicaciones de Tiempo-Real en una red de área Local", Juan M. López-Soler, José Luis Castillo Ramírez, Gerardo Pardo-Castellote, "III Jornadas de Ingeniería Telemática JITEL-2001. Barcelona, Spain. I.S.B.N. 84-7653-783-2", pp. 535-536, 2001
    close
    @Inproceedings{lopezsoler2001a,
    	title = {Evaluación de un Modelo Publicación-Subscripción para Aplicaciones de Tiempo-Real en una red de área Local},
    	booktitle={III Jornadas de Ingeniería Telemática JITEL-2001. Barcelona, Spain. I.S.B.N. 84-7653-783-2},
    	author = {Juan M. López-Soler and José Luis Castillo Ramírez and Gerardo Pardo-Castellote},
    	month = September,
    	year = {2001},
    	pages = {535-536}
    }
    close

  49. Desarrollo de un sistema remoto de consultas y reservas mediante interfaz oral
    Jesús E. Díaz-Verdejo, Pedro García, Ramón López-Cózar, Juan M. López-Soler, Juan M. Estévez, A. Rubio Ayuso
    III Jornadas de Ingeniería Telemática JITEL-2001. Barcelona, Spain. I.S.B.N. 84-7653-783-2, pp. 199-204, September 2001.
    "Desarrollo de un sistema remoto de consultas y reservas mediante interfaz oral", Jesús E. Díaz-Verdejo, Pedro García, Ramón López-Cózar, Juan M. López-Soler, Juan M. Estévez, A. Rubio Ayuso, "III Jornadas de Ingeniería Telemática JITEL-2001. Barcelona, Spain. I.S.B.N. 84-7653-783-2", pp. 199-204, 2001
    close
    @Inproceedings{lopezsoler2001b,
    	title = {Desarrollo de un sistema remoto de consultas y reservas mediante interfaz oral},
    	booktitle={III Jornadas de Ingeniería Telemática JITEL-2001. Barcelona, Spain. I.S.B.N. 84-7653-783-2},
    	author = {Jesús E. Díaz-Verdejo and Pedro García and Ramón López-Cózar and Juan M. López-Soler and Juan M. Estévez and A. Rubio Ayuso},
    	month = September,
    	year = {2001},
    	pages = {199-204}
    }
    close

  50. Channel optimized matrix quantization (COMQ) of LSP parameters over waveform channels
    J. L. Perez-Cordoba, A. Rubio, J. M. Lopez-Soler, V. E. Sanchez
    2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221), pp. 725-728 vol.2, May 2001, DOI: 10.1109/ICASSP.2001.941017.
    "Channel optimized matrix quantization (COMQ) of LSP parameters over waveform channels", J. L. Perez-Cordoba, A. Rubio, J. M. Lopez-Soler, V. E. Sanchez, "2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221)", pp. 725-728 vol.2, 2001. DOI: 10.1109/ICASSP.2001.941017
    close
    Combined source and channel coding is a technique to mitigate channel errors without increasing the bit error rate. Channel optimized vector quantizer (COVQ) performs these objectives in the context of vector quantization. This paper presents a study of channel optimized matrix quantizer (COMQ) applied to quantize the line spectral pair (LSP) parameters as an extension of COVQ technique. Gaussian and slow-fading Rayleigh channels are considered and GMSK (Gaussian minimum shift-keying) is used as modulation technique. Several channel signal to noise ratio (CSNR) are considered to measure the performance of this system. In addition, for comparison purposes, the performance of other schemes for quantizing the LSP parameters are computed.
    close
    @INPROCEEDINGS{941017,  author={J. L. {Perez-Cordoba} and A. {Rubio} and J. M. {Lopez-Soler} and V. E. {Sanchez}},  booktitle={2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221)},   title={Channel optimized matrix quantization (COMQ) of LSP parameters over waveform channels},   year={2001},  volume={2},  number={},  pages={725-728 vol.2},  abstract={Combined source and channel coding is a technique to mitigate channel errors without increasing the bit error rate. Channel optimized vector quantizer (COVQ) performs these objectives in the context of vector quantization. This paper presents a study of channel optimized matrix quantizer (COMQ) applied to quantize the line spectral pair (LSP) parameters as an extension of COVQ technique. Gaussian and slow-fading Rayleigh channels are considered and GMSK (Gaussian minimum shift-keying) is used as modulation technique. Several channel signal to noise ratio (CSNR) are considered to measure the performance of this system. In addition, for comparison purposes, the performance of other schemes for quantizing the LSP parameters are computed.},  keywords={AWGN;Constellation diagram;Channel coding;GSM;Code standards;Protection;Speech;Bit error rate;Vector quantization;Rayleigh channels},  doi={10.1109/ICASSP.2001.941017},  ISSN={1520-6149},  month={May}
    }
    close

  51. Un sistema telemático para la gestión de las donaciones y transplantes de órganos
    F. Crespo Sánchez, Alberto de Alarcón Sánchez, Juan M. López-Soler
    Simposio Español de Informática Distribuida-SEID. I.S.B.N. 84-8158-163-1 Orense, Spain, pp. 251-257, September 2000.
    "Un sistema telemático para la gestión de las donaciones y transplantes de órganos", F. Crespo Sánchez, Alberto de Alarcón Sánchez, Juan M. López-Soler, "Simposio Español de Informática Distribuida-SEID. I.S.B.N. 84-8158-163-1
    Orense, Spain", pp. 251-257, 2000
    close
    @Inproceedings{lopezsoler2000b,
    	title = {Un sistema telemático para la gestión de las donaciones y transplantes de órganos},
    	booktitle={Simposio Español de Informática Distribuida-SEID. I.S.B.N. 84-8158-163-1
    Orense, Spain},
    	author = {F. Crespo Sánchez and Alberto de Alarcón Sánchez and Juan M. López-Soler},
    	month = September,
    	year = {2000},
    	pages = {251-257}
    }
    close

  52. Una extensión del modelo relacional para la construcción de sistemas de base de datos distribuidos
    F. Crespo Sánchez, Juan M. López-Soler
    Simposio Español de Informática Distribuida-SEID. I.S.B.N. 84-8158-163-1 Orense, Spain, pp. 243-249, September 2000.
    "Una extensión del modelo relacional para la construcción de sistemas de base de datos distribuidos", F. Crespo Sánchez, Juan M. López-Soler, "Simposio Español de Informática Distribuida-SEID. I.S.B.N. 84-8158-163-1
    Orense, Spain", pp. 243-249, 2000
    close
    @Inproceedings{lopezsoler2000a,
    	title = {Una extensión del modelo relacional para la construcción de sistemas de base de datos distribuidos},
    	booktitle={Simposio Español de Informática Distribuida-SEID. I.S.B.N. 84-8158-163-1
    Orense, Spain},
    	author = {F. Crespo Sánchez and Juan M. López-Soler},
    	month = September,
    	year = {2000},
    	pages = {243-249}
    }
    close

  53. Hard-decision in COVQ over waveform channels
    J. L. Perez-Cordoba, A. J. Rubio, J. M. Lopez-Soler, M. C. Benitez
    Proceedings DCC 2000. Data Compression Conference, pp. 53-62, March 2000, DOI: 10.1109/DCC.2000.838145.
    "Hard-decision in COVQ over waveform channels", J. L. Perez-Cordoba, A. J. Rubio, J. M. Lopez-Soler, M. C. Benitez, "Proceedings DCC 2000. Data Compression Conference", pp. 53-62, 2000. DOI: 10.1109/DCC.2000.838145
    close
    A channel optimized vector quantizer (COVQ) is studied for the case of transmission over waveform channels. In this work, a number of modulation schemes with multidimensional signal constellations are considered, specifically, results on the binary signalling. M-ary phase-shift keying (MPSK) and M-ary quadrature amplitude modulation (MQAM) performance using COVQ with hard-decision decoding, is optimized for additive white Gaussian noise (AWGN) and flat-fading Rayleigh channel. In addition, when a flat-fading Rayleigh channel is assumed, diversity techniques are used and evaluated to improve the performance of the system.
    close
    @INPROCEEDINGS{838145,  author={J. L. {Perez-Cordoba} and A. J. {Rubio} and J. M. {Lopez-Soler} and M. C. {Benitez}},  booktitle={Proceedings DCC 2000. Data Compression Conference},   title={Hard-decision in COVQ over waveform channels},   year={2000},  volume={},  number={},  pages={53-62},  abstract={A channel optimized vector quantizer (COVQ) is studied for the case of transmission over waveform channels. In this work, a number of modulation schemes with multidimensional signal constellations are considered, specifically, results on the binary signalling. M-ary phase-shift keying (MPSK) and M-ary quadrature amplitude modulation (MQAM) performance using COVQ with hard-decision decoding, is optimized for additive white Gaussian noise (AWGN) and flat-fading Rayleigh channel. In addition, when a flat-fading Rayleigh channel is assumed, diversity techniques are used and evaluated to improve the performance of the system.},  keywords={Constellation diagram;Decoding;Rayleigh channels;Quadrature amplitude modulation;Multidimensional systems;Additive white noise;Fading;Design optimization;Source coding;Delay},  doi={10.1109/DCC.2000.838145},  ISSN={1068-0314},  month={March}
    }
    close

  54. Uso experimental de un umbral de confianza dinámico en el proceso de reconocimiento del habla
    R. López-Cózar, A.J. Rubio, A. de la Torre, Juan M. López-Soler
    Procesamiento del lenguaje natural. ISSN: 1135-5948. e-ISSN: 1989-7553. Vol. 25, pp. 123-128, September 1999.
    "Uso experimental de un umbral de confianza dinámico en el proceso de reconocimiento del habla", R. López-Cózar, A.J. Rubio, A. de la Torre, Juan M. López-Soler, "Procesamiento del lenguaje natural. ISSN: 1135-5948. e-ISSN: 1989-7553. Vol. 25", pp. 123-128, 1999
    close
    @Inproceedings{lopezsoler1999,
    	title = {Uso experimental de un umbral de confianza dinámico en el proceso de reconocimiento del habla},
    	booktitle={Procesamiento del lenguaje natural. ISSN: 1135-5948. e-ISSN: 1989-7553. Vol. 25},
    	author = {R. López-Cózar and A.J. Rubio and A. de la Torre and Juan M. López-Soler},
    	month = September,
    	year = {1999},
    	pages = {123-128}
    }
    close

  55. Speech Recognition and the New Technologies in Communications: A Continuous Speech Recognition-Based Switchboard with an Answering Module for E-mailing Voice Messages
    P. García, J.C. Segura, J. Díaz-Verdejo, A. Rubio, M.C. Benítez, A. Peinado, Juan M. López-Soler, J.L. Pérez, V. Sánchez, A. de la Torre, R. López-Cózar
    Proceedings of the First International Conference on Language Resources and Evaluation. Vol. II. Granada, Spain, pp. 1263-1266, 1998.
    "Speech Recognition and the New Technologies in Communications: A Continuous Speech Recognition-Based Switchboard with an Answering Module for E-mailing Voice Messages", P. García, J.C. Segura, J. Díaz-Verdejo, A. Rubio, M.C. Benítez, A. Peinado, Juan M. López-Soler, J.L. Pérez, V. Sánchez, A. de la Torre, R. López-Cózar, "Proceedings of the First International Conference on Language Resources and Evaluation. Vol. II. Granada, Spain", pp. 1263-1266, 1998
    close
    @Inproceedings{lopezsoler1998a,
    	title = {Speech Recognition and the New Technologies in Communications: A Continuous Speech Recognition-Based Switchboard with an Answering Module for E-mailing Voice Messages},
    	booktitle={Proceedings of the First International Conference on Language Resources and Evaluation. Vol. II. Granada, Spain},
    	author = {P. García and J.C. Segura and J. Díaz-Verdejo and A. Rubio and M.C. Benítez and A. Peinado and Juan M. 	López-Soler and J.L. Pérez and V. Sánchez and A. de la Torre and R. López-Cózar},
    	year = {1998},
    	pages = {1263-1266}
    }
    close

  56. STACC: An Automatic Service for Information Access Using Continuous Speech Recognition through Telephone Line
    Antonio J. Rubio, Pedro Garcia, Angel de la Torre, Jose C. Segura, Jesus Diaz-Verdejo, Maria C. Benitez, Victoria Sanchez, Antonio M. Peinado, Juan M. Lopez-Soler, Jose L. Perez-Cordoba
    Fifth European Conference on Speech Communication and Technology, EUROSPEECH 1997, Rhodes, Greece, pp. 1779-1782, September 1997.
    "STACC: An Automatic Service for Information Access Using Continuous Speech Recognition through Telephone Line", Antonio J. Rubio, Pedro Garcia, Angel de la Torre, Jose C. Segura, Jesus Diaz-Verdejo, Maria C. Benitez, Victoria Sanchez, Antonio M. Peinado, Juan M. Lopez-Soler, Jose L. Perez-Cordoba, "Fifth European Conference on Speech Communication and Technology, EUROSPEECH 1997, Rhodes, Greece", pp. 1779-1782, 1997
    close
    @inproceedings{lopezsoler1997,
    author = {Antonio J. Rubio and Pedro Garcia and Angel de la Torre and Jose C. Segura and Jesus Diaz-Verdejo and Maria C. Benitez and Victoria Sanchez and Antonio M. Peinado and Juan M. Lopez-Soler and Jose L. Perez-Cordoba},
    title = {STACC: An Automatic Service for Information Access Using Continuous Speech Recognition through Telephone Line},
    booktitle={Fifth European Conference on Speech Communication and Technology, EUROSPEECH 1997, Rhodes, Greece},
    year = {1997},
    month = {September},
    pages = {1779-1782}
    }
    close

  57. Excitation Parameters Encoding with a Combined Quantization-Interpolation Algorithm
    J. M. Lopez-Soler, A. Rubio-Ayuso
    Proceedings. IEEE Workshop on Speech Coding for Telecommunications, pp. 91-92, September 1995, DOI: 10.1109/SCFT.1995.658142.
    "Excitation Parameters Encoding with a Combined Quantization-Interpolation Algorithm", J. M. Lopez-Soler, A. Rubio-Ayuso, "Proceedings. IEEE Workshop on Speech Coding for Telecommunications", pp. 91-92, 1995. DOI: 10.1109/SCFT.1995.658142
    close
    @INPROCEEDINGS{658142,  author={J. M. {Lopez-Soler} and A. {Rubio-Ayuso}},  booktitle={Proceedings. IEEE Workshop on Speech Coding for Telecommunications},   title={Excitation Parameters Encoding with a Combined Quantization-Interpolation Algorithm},   year={1995},  volume={},  number={},  pages={91-92},  abstract={},  keywords={Encoding;Algorithm design and analysis;Linear predictive coding;Interpolation;Speech coding;Costs;Bit rate;Signal analysis;Cloning;Rate-distortion},  doi={10.1109/SCFT.1995.658142},  ISSN={},  month={September}}
    close

  58. Transform trellis coded quantization of speech using small frame sizes
    V. E. Sanchez, J. L. Perez, J. M. Lopez, A. J. Rubio
    Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing, pp. I/177-I/180 vol.1, April 1994, DOI: 10.1109/ICASSP.1994.389326.
    "Transform trellis coded quantization of speech using small frame sizes", V. E. Sanchez, J. L. Perez, J. M. Lopez, A. J. Rubio, "Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing", pp. I/177-I/180 vol.1, 1994. DOI: 10.1109/ICASSP.1994.389326
    close
    Proposes a transform trellis coded quantization (TTCQ) scheme suitable for low-delay speech coding. This scheme is based on a general transform domain formulation for small frame sizes and the trellis coded quantization technique previously proposed where Ungerboeck's amplitude modulation trellises and set partitioning ideas are used for source coding. Using the discrete cosine transform the authors apply this technique to the coding of 7 kHz wideband speech, a matter of interest due to ISDN based applications. A 32 kbps low-delay coder is developed, simulation results showing a very high speech quality comparable to that obtained by the G722 standard at 64 kbps.<>
    close
    @INPROCEEDINGS{389326,
    author={V. E. {Sanchez} and J. L. {Perez} and J. M. Lopez and A. J. {Rubio}},  booktitle={Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing},   title={Transform trellis coded quantization of speech using small frame sizes},   year={1994},  volume={i},  number={},  pages={I/177-I/180 vol.1},  abstract={Proposes a transform trellis coded quantization (TTCQ) scheme suitable for low-delay speech coding. This scheme is based on a general transform domain formulation for small frame sizes and the trellis coded quantization technique previously proposed where Ungerboeck's amplitude modulation trellises and set partitioning ideas are used for source coding. Using the discrete cosine transform the authors apply this technique to the coding of 7 kHz wideband speech, a matter of interest due to ISDN based applications. A 32 kbps low-delay coder is developed, simulation results showing a very high speech quality comparable to that obtained by the G722 standard at 64 kbps.<>},  keywords={Quantization;Discrete transforms;Speech coding;Amplitude modulation;Source coding;Discrete cosine transforms;Wideband;ISDN;Code standards;Standards development},  doi={10.1109/ICASSP.1994.389326},  ISSN={1520-6149},  month={April}
    }
    close

  59. A combined quantization-interpolation scheme for very low bit rate coding of speech LSP parameters
    J. M. Lopez-Soler, N. Farvardin
    1993 IEEE International Conference on Acoustics, Speech, and Signal Processing, pp. 21-24 vol.2, April 1993, DOI: 10.1109/ICASSP.1993.319218.
    "A combined quantization-interpolation scheme for very low bit rate coding of speech LSP parameters", J. M. Lopez-Soler, N. Farvardin, "1993 IEEE International Conference on Acoustics, Speech, and Signal Processing", pp. 21-24 vol.2, 1993. DOI: 10.1109/ICASSP.1993.319218
    close
    A combined quantization-interpolation of speech line spectrum pair (LSP) parameters is proposed. To utilize the linear dependency between successive LSP frames, the proposed algorithm attempts to locate the frames where there is a significant spectral change; these frames are encoded by vector quantization. The remaining frames are reconstructed by linear interpolation between the vector-quantized frames. A two-pass algorithm is used to couple the quantization and interpolation operations. Simulation results for the performance of the combined quantization-interpolation approach indicate that, at rates below 350 bits/s (for coding the spectral parameters), the proposed scheme outperforms the multiframe coding scheme of D. P. Kemp et al. (ICASSP-91, p.609-12). The effect of maximum delay on the overall performance is studied, and the performance of the proposed system over noisy channels is examined.<>
    close
    @INPROCEEDINGS{319218,  author={J. M. {Lopez-Soler} and N. {Farvardin}},  booktitle={1993 IEEE International Conference on Acoustics, Speech, and Signal Processing},   title={A combined quantization-interpolation scheme for very low bit rate coding of speech LSP parameters},   year={1993},  volume={2},  number={},  pages={21-24 vol.2},  abstract={A combined quantization-interpolation of speech line spectrum pair (LSP) parameters is proposed. To utilize the linear dependency between successive LSP frames, the proposed algorithm attempts to locate the frames where there is a significant spectral change; these frames are encoded by vector quantization. The remaining frames are reconstructed by linear interpolation between the vector-quantized frames. A two-pass algorithm is used to couple the quantization and interpolation operations. Simulation results for the performance of the combined quantization-interpolation approach indicate that, at rates below 350 bits/s (for coding the spectral parameters), the proposed scheme outperforms the multiframe coding scheme of D. P. Kemp et al. (ICASSP-91, p.609-12). The effect of maximum delay on the overall performance is studied, and the performance of the proposed system over noisy channels is examined.<>},  keywords={Bit rate;Speech coding;Interpolation;Rate-distortion;Linear predictive coding;Encoding;Educational institutions;Vector quantization;Delay effects;Vocoders},  doi={10.1109/ICASSP.1993.319218},  ISSN={1520-6149},  month={April}
    }
    close

  60. Realización de un sintetizador multipulso para un conversor texto-voz en castellano
    A.J. Rubio, J.C. Segura, V.E. Sánchez, Juan M. López-Soler, J.L. Pérez
    Sociedad Española para el Procesamiento del Lenguaje Natural- SEPLN. Boletín SEPLN. Nº 13. Granada, Spain, pp. 401-410, February 1993.
    "Realización de un sintetizador multipulso para un conversor texto-voz en castellano", A.J. Rubio, J.C. Segura, V.E. Sánchez, Juan M. López-Soler, J.L. Pérez, "Sociedad Española para el Procesamiento del Lenguaje Natural- SEPLN. Boletín SEPLN. Nº 13. Granada, Spain", pp. 401-410, 1993
    close
    @Inproceedings{lopezsoler1993a,
    	title = {Realización de un sintetizador multipulso para un conversor texto-voz en castellano},
    	booktitle={Sociedad Española para el Procesamiento del Lenguaje Natural- SEPLN. Boletín SEPLN. Nº 13. Granada, Spain},
    	author = {A.J. Rubio and J.C. Segura and V.E. Sánchez and Juan M. López-Soler and J.L. Pérez},
    	month = February,
    	year = {1993},
    	pages = {401-410}
    }
    close

  61. Simulación de un servicio remoto de suministro mediante reconocimiento automático de palabras aisladas
    J.C. Segura, Juan M. Lopez-Soler, A.J. Rubio, P. Garcia, A.M. Peinado
    Sociedad Española para el Procesamiento del Lenguaje Natural- SEPLN. Boletín SEPLN. Nº 13. Granada, Spain, pp. 463-464, February 1993.
    "Simulación de un servicio remoto de suministro mediante reconocimiento automático de palabras aisladas", J.C. Segura, Juan M. Lopez-Soler, A.J. Rubio, P. Garcia, A.M. Peinado, "Sociedad Española para el Procesamiento del Lenguaje Natural- SEPLN. Boletín SEPLN. Nº 13. Granada, Spain", pp. 463-464, 1993
    close
    @Inproceedings{lopezsoler1993b,
         title = {Simulación de un servicio remoto de suministro mediante reconocimiento automático de palabras aisladas},
    	booktitle={Sociedad Española para el Procesamiento del Lenguaje Natural- SEPLN. Boletín SEPLN. Nº 13. Granada, Spain},
    	author = {J.C. Segura and Juan M. Lopez-Soler and A.J. Rubio and P. Garcia and A.M. Peinado},
    	month = February,
    	year = {1993},
    	pages = {463-464}
    }
    close

  62. Frequency Domain Low-Delay Wideband Coding of Speech at 32 Kbps
    V.E. Sánchez, J.P. Adoul, A.J. Rubio, Juan M. López-Soler
    Proceedings of the International Conference on Signal Processing Applications and Technology. Boston, USA, November 1992.
    "Frequency Domain Low-Delay Wideband Coding of Speech at 32 Kbps", V.E. Sánchez, J.P. Adoul, A.J. Rubio, Juan M. López-Soler, "Proceedings of the International Conference on Signal Processing Applications and Technology. Boston, USA", 1992
    close
    @Inproceedings{lopezsoler1992b,
    	title = {Frequency Domain Low-Delay Wideband Coding of Speech at 32 Kbps},
    	booktitle={Proceedings of the International Conference on Signal Processing Applications and Technology. Boston, USA},
    	author = {V.E. Sánchez and J.P. Adoul and A.J. Rubio and Juan M. López-Soler},
    	month = November,
    	year = {1992}
    }
    close

  63. Una red neuronal recurrente para evaluación de modelos ocultos de Markov semicontinuos
    J.E. Díaz Verdejo, J.C. Segura Luna, A. Rubio Ayuso, A. Peinado Herreros, Juan M. López-Soler
    URSI-92. Málaga, Spain, September 1992.
    "Una red neuronal recurrente para evaluación de modelos ocultos de Markov semicontinuos", J.E. Díaz Verdejo, J.C. Segura Luna, A. Rubio Ayuso, A. Peinado Herreros, Juan M. López-Soler, "URSI-92. Málaga, Spain", 1992
    close
    @Inproceedings{lopezsoler1992a,
    	title = {Una red neuronal recurrente para evaluación de modelos ocultos de Markov semicontinuos},
    	booktitle={URSI-92. Málaga, Spain},
    	author = {J.E. Díaz Verdejo and J.C. Segura Luna and A. Rubio Ayuso and A. Peinado Herreros and Juan M. López-Soler},
    	month = September,
    	year = {1992}
    }
    close

  64. Including duration Information in a threshold-based rejector for HMM Speech Recognition
    A.M. Peinado, A. Rubio, Juan M. López-Soler, J.C. Segura, V. Sánchez
    XIIeme Congres International des Sciencies Phonetiques. Aix-en-Provence (France), August 1991.
    "Including duration Information in a threshold-based rejector for HMM Speech Recognition", A.M. Peinado, A. Rubio, Juan M. López-Soler, J.C. Segura, V. Sánchez, "XIIeme Congres International des Sciencies Phonetiques. Aix-en-Provence (France)", 1991
    close
    @Inproceedings{lopezsoler1991a,
    	title = {Including duration Information in a threshold-based rejector for HMM Speech Recognition},
    	booktitle={XIIeme Congres International des Sciencies Phonetiques. Aix-en-Provence (France)},
    	author = {A.M. Peinado and A. Rubio and Juan M. López-Soler and J.C. Segura and V. Sánchez},
    	month = August,
    	year = {1991}
    }
    close

  65. Comparison of the modified Hermite transformation with other unitary transformations in a predictive transform coding scheme
    Victoria Sánchez, Antonio Peinado, Juan M. López-Soler, José C. Segura, Antonio Rubio
    XIIeme Congres International des Sciencies Phonetiques. Aix-en-Provence (France), August 1991.
    "Comparison of the modified Hermite transformation with other unitary transformations in a predictive transform coding scheme", Victoria Sánchez, Antonio Peinado, Juan M. López-Soler, José C. Segura, Antonio Rubio, "XIIeme Congres International des Sciencies Phonetiques. Aix-en-Provence (France)", 1991
    close
    @Inproceedings{lopezsoler1991b,
    	title = {Comparison of the modified Hermite transformation with other unitary transformations in a predictive transform coding scheme},
    	booktitle={XIIeme Congres International des Sciencies Phonetiques. Aix-en-Provence (France)},
    	author = {Victoria Sánchez and Antonio Peinado and Juan M. López-Soler and José C. Segura and Antonio Rubio},
    	month = August,
    	year = {1991}
    }
    close

  66. Bottom to top algorithms for tree-codebook design in vector quantization for speech coding
    Juan M. Lopez-Soler, A.M. Peinado, J.C. Segura, V. Sanchez, A. Rubio
    1990 IEEE BILKENT International Conference on New Trends in Communication, Control and Signal Processing. Vol. II, Ankara (Turkey), pp. 1109-1113, December 1990.
    "Bottom to top algorithms for tree-codebook design in vector quantization for speech coding", Juan M. Lopez-Soler, A.M. Peinado, J.C. Segura, V. Sanchez, A. Rubio, "1990 IEEE BILKENT International Conference on New Trends in Communication, Control and Signal Processing. Vol. II, Ankara (Turkey)", ISBN 0444887628, pp. 1109-1113, 1990
    close
    @Inproceedings{lopezsoler1990b,
    	title = {Bottom to top algorithms for tree-codebook design in vector quantization for speech coding},
    	booktitle={1990 IEEE BILKENT International Conference on New Trends in Communication, Control and Signal Processing. Vol. II, Ankara (Turkey)},
    	isbn = {0444887628},
    	author = {Juan M. Lopez-Soler and A.M. Peinado and J.C. Segura and  V. Sanchez and A. Rubio},
    	month = December,
    	year = {1990},
    	pages = {1109-1113}
    }
    close

  67. Increasing the difference between the significant singular values and the non-significant singular values in a model of LPC excitation based on the SVD
    V. Sanchez, Juan M. Lopez-Soler, J.C. Segura, A.M. Peinado, A. Rubio
    European Signal Processing Conference. EUSIPCO-90. Barcelona, Spain, pp. 1251-1254, September 1990.
    "Increasing the difference between the significant singular values and the non-significant singular values in a model of LPC excitation based on the SVD", V. Sanchez, Juan M. Lopez-Soler, J.C. Segura, A.M. Peinado, A. Rubio, "European Signal Processing Conference. EUSIPCO-90. Barcelona, Spain", pp. 1251-1254, 1990
    close
    @Inproceedings{lopezsoler1990c,
    	title = {Increasing the difference between the significant singular values and the non-significant singular values in a model of LPC excitation based on the SVD},
    	booktitle={European Signal Processing Conference. EUSIPCO-90. Barcelona, Spain},
    	author = {V. Sanchez and Juan M. Lopez-Soler and J.C. Segura and A.M. Peinado and A. Rubio},
    	month = September,
    	year = {1990},
    	pages = 1251-1254}
    close

  68. Distance measures performance in VQ
    Juan M. Lopez-Soler, A.M. Peinado, J.C. Segura, V. Sanchez, A. Rubio
    European Signal Processing Conference. EUSIPCO-90. Barcelona, Spain, pp. 1278-1290, September 1990.
    "Distance measures performance in VQ", Juan M. Lopez-Soler, A.M. Peinado, J.C. Segura, V. Sanchez, A. Rubio, "European Signal Processing Conference. EUSIPCO-90. Barcelona, Spain", pp. 1278-1290, 1990
    close
    @Inproceedings{lopezsoler1990e,
    	title = {Distance measures performance in VQ},
    	booktitle={European Signal Processing Conference. EUSIPCO-90. Barcelona, Spain},
    	author = {Juan M. Lopez-Soler and A.M. Peinado and J.C. Segura and V. Sanchez and A. Rubio},
    	month = September,
    	year = {1990},
    	pages = {1278-1290}
    }
    close

  69. Signal segmentation into spectral homogeneous units
    J.C. Segura, Juan M. Lopez-Soler, A.M. Peinado, V. Sanchez, A. Rubio
    European Signal Processing Conference. EUSIPCO-90. Barcelona, Spain, pp. 1278-1290, September 1990.
    "Signal segmentation into spectral homogeneous units", J.C. Segura, Juan M. Lopez-Soler, A.M. Peinado, V. Sanchez, A. Rubio, "European Signal Processing Conference. EUSIPCO-90. Barcelona, Spain", pp. 1278-1290, 1990
    close
    @Inproceedings{lopezsoler1990d,
    	title = {Signal segmentation into spectral homogeneous units},
    	booktitle={European Signal Processing Conference. EUSIPCO-90. Barcelona, Spain},
    	author = {J.C. Segura and Juan M. Lopez-Soler and A.M. Peinado and V. Sanchez and A. Rubio},
    	month = September,
    	year = {1990},
    	pages = {1278-1290}
    }
    close

  70. Reconocimiento de voz mediante Modelos Discretos de Markov para Control de un Robot mediante voz
    A.M. Peinado, Juan M. Lopez-Soler, J.C. Segura, V. Sanchez, A. Rubio
    IV Simposium Nacional de Reconocimiento de Formas y Analisis de Imagenes, pp. 109-110, September 1990.
    "Reconocimiento de voz mediante Modelos Discretos de Markov para Control de un Robot mediante voz", A.M. Peinado, Juan M. Lopez-Soler, J.C. Segura, V. Sanchez, A. Rubio, "IV Simposium Nacional de Reconocimiento de Formas y Analisis de Imagenes", pp. 109-110, 1990
    close
    @Inproceedings{lopezsoler1990f,
    	title = {Reconocimiento de voz mediante Modelos Discretos de Markov para Control de un Robot mediante voz},
    	booktitle={IV Simposium Nacional de Reconocimiento de Formas y Analisis de Imagenes},
    	author = {A.M. Peinado and Juan M. Lopez-Soler and J.C. Segura and V. Sanchez and A. Rubio},
    	month = September,
    	year = {1990},
    	pages = {109-110}
    }
    close

  71. A tree codebook design algorithm for digital speech storage using vector quantization
    Juan M. Lopez-Soler, M.C. Benitez, J.A. Galvez, V. Sanchez, A. Rubio
    Fourth International Symposium on Knowledge Engineering, Barcelona, Spain, May 1990.
    "A tree codebook design algorithm for digital speech storage using vector quantization", Juan M. Lopez-Soler, M.C. Benitez, J.A. Galvez, V. Sanchez, A. Rubio, "Fourth International Symposium on Knowledge Engineering, Barcelona, Spain", 1990
    close
    @Inproceedings{lopezsoler1990a,
    	title = {A tree codebook design algorithm for digital speech storage using vector quantization},
    	booktitle={Fourth International Symposium on Knowledge Engineering, Barcelona, Spain},
    		author = {Juan M. Lopez-Soler and M.C. Benitez and J.A. Galvez and V. Sanchez and A. Rubio},
    	month = May,
    	year = {1990}
    }
    close


Standards

  1. Network Functions Virtualisation (NFV) Release 3; Evolution and Ecosystem; Report on Network Slicing Support with ETSI NFV Architecture Framework
    José A. Ordóñez, Juan J. Ramos, Pablo Ameigeiras, Juan M. Lopez-Soler et al.
    ETSI, Network Functions Virtualisation (NFV) ETSI Industry Specification Group (ISG) ETSI GR NFV-EVE 012 V3.1.1, December 2017, URL: https://www.etsi.org/deliver/etsi_gr/NFV-EVE/001_099/012/03.01.01_60/gr_nfv-eve012v030101p.pdf.
    "Network Functions Virtualisation (NFV) Release 3; Evolution and Ecosystem; Report on Network Slicing Support with ETSI NFV Architecture Framework", José A. Ordóñez, Juan J. Ramos, Pablo Ameigeiras, Juan M. Lopez-Soler et al., ETSI, pp. 1-35, 2017
    close
    @techreport{ordonez2017etsii,
       AUTHOR = "José A. Ordóñez and Juan J. Ramos and Pablo Ameigeiras and Juan M. Lopez-Soler et al.",
       TITLE = "Network Functions Virtualisation (NFV) Release 3; Evolution and Ecosystem; Report on Network Slicing Support with ETSI NFV Architecture Framework",
       HOWPUBLISHED = {ETSI Group Report},
       TYPE="standard",
       PAGES = {1-35},
       YEAR = {2017},
       MONTH = {December},
       INSTITUTION = "{ETSI}",
       NUMBER = "Network Functions Virtualisation (NFV) ETSI Industry Specification Group (ISG) ETSI GR NFV-EVE 012 V3.1.1",
       URL={https://www.etsi.org/deliver/etsi_gr/NFV-EVE/001_099/012/03.01.01_60/gr_nfv-eve012v030101p.pdf},
       note="standard"
    }
    close



Deliverables

  1. Project H2020 5G-CLARITY (Grant No. 871428): Deliverable D6.3. Mid-term report on disseminations and communications activities
    J. M. Lopez-Soler, T. Cogalan, R. Bian, J. Gutierrez, M. Ghoraishi
    "Project H2020 5G-CLARITY  (Grant No. 871428): Deliverable D6.3. Mid-term report on disseminations and communications activities", J. M. Lopez-Soler, T. Cogalan, R. Bian, J. Gutierrez, M. Ghoraishi, 5G-CLARITY, 2021
    close
    @techreport{5GCLARITYD63,
      author      = "J. M. {Lopez-Soler} and T. Cogalan and R. Bian and J. Gutierrez and M. Ghoraishi",
      title       = "Project H2020 5G-CLARITY  (Grant No. 871428): Deliverable D6.3. Mid-term report on disseminations and communications activities",
      institution = "5G-CLARITY",
      year        = "2021",
      type        = "deliverable",
      month       = "May",
      URL         = {https://www.5gclarity.com/wp-content/uploads/2021/05/5G-CLARITY_D63.pdf},
      project     = {5gclarity}
    }
    close

  2. Project H2020 5G-CLARITY (Grant No. 871428): Deliverable D6.1. Plan for explotation and dissemination of the project results
    J. M. Lopez-Soler, O. Adamuz-Hinojosa, J. Navarro-Ortiz, L. Chinchilla-Romero, J. Prados-Garzon, J. Ordonez-Lucena, G. Rigazzi, U. Olvera-Hernandez, D. Camps-Mur, A. Garcia, T. Cogalan, S. Yan, R. Bian, E. Aumayr, M. A. Granda, J. Gutierrez-Teran, M. Ghoraishi
    "Project H2020 5G-CLARITY  (Grant No. 871428): Deliverable D6.1. Plan for explotation and dissemination of the project results", J. M. Lopez-Soler, O. Adamuz-Hinojosa, J. Navarro-Ortiz, L. Chinchilla-Romero, J. Prados-Garzon, J. Ordonez-Lucena, G. Rigazzi, U. Olvera-Hernandez, D. Camps-Mur, A. Garcia, T. Cogalan, S. Yan, R. Bian, E. Aumayr, M. A. Granda, J. Gutierrez-Teran, M. Ghoraishi, 5G-CLARITY, 2020
    close
    @techreport{5GCLARITYD61,
      author      = "J. M. {Lopez-Soler} and O. {Adamuz-Hinojosa} and J. {Navarro-Ortiz} and L. {Chinchilla-Romero} and J. {Prados-Garzon} and J. {Ordonez-Lucena} and G. {Rigazzi} and U. {Olvera-Hernandez} and D. {Camps-Mur} and A. {Garcia} and T. {Cogalan} and S. {Yan} and R. {Bian} and E. {Aumayr} and M. A. {Granda} and J. {Gutierrez-Teran} and M. Ghoraishi",
      title       = "Project H2020 5G-CLARITY  (Grant No. 871428): Deliverable D6.1. Plan for explotation and dissemination of the project results",
      institution = "5G-CLARITY",
      year        = "2020",
      type        = "deliverable",
      month       = "Jan",
      URL         = {https://www.5gclarity.com/wp-content/uploads/2020/06/5G-CLARITY_D61.pdf},
      project     = {5gclarity}
    }
    close


Books & Book Chapters

  1. SLHMM: An ANN Approach for Continuous Speech Recognition
    Segura-Luna J.C., Díaz-Verdejo J.E., Rubio-Ayuso A.J., García-Teodoro P., López-Soler J. M.
    Book "Speech Recognition and Coding. NATO ASI Series (Series F: Computer and Systems Sciences)", pp. 116-119, 1995, ISBN 978-3-642-63344-7, DOI: https://doi.org/10.1007/978-3-642-57745-1_20.
    "SLHMM: An ANN Approach for Continuous Speech Recognition", Segura-Luna J.C., Díaz-Verdejo J.E., Rubio-Ayuso A.J., García-Teodoro P., López-Soler J. M., "Speech Recognition and Coding. NATO ASI Series (Series F: Computer and Systems Sciences)", ISBN 978-3-642-63344-7, pp. 116-119, 1995. DOI: https://doi.org/10.1007/978-3-642-57745-1_20
    close
    Nowadays a big research effort is being made in the development of CSR systems, both ANN-based and HMM-based. Up to now, the HMM-based systems seem to have the best performance, although the ANN-based ones are being developed quicker than the HMM-based due to the new topologies that are being tested with increasingly good results.
    close
    @inbook{SEGURA1995,
    author = {Segura-Luna J.C. and Díaz-Verdejo J.E. and Rubio-Ayuso A.J. and García-Teodoro P. and López-Soler J. M.},
    publisher = {Springer, Berlin, Heidelberg},
    isbn = {978-3-642-63344-7},
    title = {SLHMM: An ANN Approach for Continuous Speech Recognition},
    booktitle = {Speech Recognition and Coding. NATO ASI Series (Series F: Computer and Systems Sciences)},
    volume = {147},
    pages = {116-119},
    year = {1995},
    abstract = {Nowadays a big research effort is being made in the development of CSR systems, both ANN-based and HMM-based. Up to now, the HMM-based systems seem to have the best performance, although the ANN-based ones are being developed quicker than the HMM-based due to the new topologies that are being tested with increasingly good results.},
    doi ={https://doi.org/10.1007/978-3-642-57745-1_20}}
    close

  2. Speech Recognition and Coding: New Advances and Trends
    Antonio J. Rubio Ayuso, Juan M. Lopez-Soler
    Ed. Springer, Berlin, Heidelberg. NATO ASI Series, 1995, ISBN 978-3-540-60098-5, DOI: https://doi.org/10.1007/978-3-642-57745-1.
    "Speech Recognition and Coding: New Advances and Trends", Antonio J. Rubio Ayuso, Juan M. Lopez-Soler, ISBN 978-3-540-60098-5, pp. 1-505, 1995. DOI: https://doi.org/10.1007/978-3-642-57745-1
    close
    Based on a NATO Advanced Study Institute held in 1993, this book addresses recent advances in automatic speech recognition and speech coding. The book contains contributions by many of the most outstanding researchers from the best laboratories worldwide in the field. The contributions have been grouped into five parts: on acoustic modeling; language modeling; speech processing, analysis and synthesis; speech coding; and vector quantization and neural nets. For each of these topics, some of the best-known researchers were invited to give a lecture. In addition to these lectures, the topics were complemented with discussions and presentations of the work of those attending. Altogether, the reader is given a wide perspective on recent advances in the field and will be able to see the trends for future work.
    close
    @Book{speech95,
      title  = {Speech Recognition and Coding: New Advances and Trends},
      year   = {1995},
      author = {Antonio J. Rubio Ayuso and Juan M. Lopez-Soler},
      publisher = {Springer, Berlin, Heidelberg. NATO ASI Series},
      isbn   = {978-3-540-60098-5},
      url    = {https://link.springer.com/book/10.1007/978-3-642-57745-1},
      pages = {1-505},
      doi = {https://doi.org/10.1007/978-3-642-57745-1},
      abstract = {Based on a NATO Advanced Study Institute held in 1993, this book addresses recent advances in automatic speech recognition and speech coding. The book contains contributions by many of the most outstanding researchers from the best laboratories worldwide in the field. The contributions have been grouped into five parts: on acoustic modeling; language modeling; speech processing, analysis and synthesis; speech coding; and vector quantization and neural nets. For each of these topics, some of the best-known researchers were invited to give a lecture. In addition to these lectures, the topics were complemented with discussions and presentations of the work of those attending. Altogether, the reader is given a wide perspective on recent advances in the field and will be able to see the trends for future work.},
      note   = {research}
    }
    close


Patents

  1. Procedure and system for integration of LPWAN networks and 4G/5G suitable for use in industrial internet applications of things
    Jorge Navarro-Ortiz, Sandra Sendra, Pablo Ameigeiras Gutierrez, Juan Manuel Lopez-Soler
    Universidad de Granada, Application No. P201830137, Publication No. ES2722927 A1, Aug 2018, URL: http://consultas2.oepm.es/InvenesWeb/detalle?referencia=P201830137.
    "Procedure and system for integration of LPWAN networks and 4G/5G suitable for use in industrial internet applications of things", Universidad de Granada, Application No. P201830137, Publication No. ES2722927 A1, Jorge Navarro-Ortiz, Sandra Sendra, Pablo Ameigeiras Gutierrez, Juan Manuel Lopez-Soler, 2018
    close
    @patent{navarro2019,
    	title = {Procedure and system for integration of LPWAN networks and 4G/5G suitable for use in industrial internet applications of things},
    	url = {http://consultas2.oepm.es/InvenesWeb/detalle?referencia=P201830137},
    	language = {es},
    	assignee = {Universidad de Granada, Application No. P201830137, Publication No. ES2722927 A1},
    	urldate = {2019-08-20},
    	author = {Navarro-Ortiz, Jorge and Sendra, Sandra and Ameigeiras Gutierrez, Pablo and Lopez-Soler, Juan Manuel},
    	month = Aug,
    	year = {2018}
    }
    close

  2. A Method and a System for Scheduling the Downlink in Long Term Evolution (lte) Networks Based on Quality of Service (qos)
    Pablo Ameigeiras, Jorge Navarro-Ortiz, Juan Manuel Lopez-Soler, Raquel Garcia-Perez, Quiliano Perez-Tarrero, Javier Lorca-Hernando
    TELEFONICA, S.A., International Application No. PCT/EP2013/053324, Publication No. WO/2013/127665, September 2013, URL: https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2013127665.
    "A Method and a System for Scheduling the Downlink in Long Term Evolution (lte) Networks Based on Quality of Service (qos)", TELEFONICA, S.A., International Application No. PCT/EP2013/053324, Publication No. WO/2013/127665, Pablo Ameigeiras, Jorge Navarro-Ortiz, Juan Manuel Lopez-Soler, Raquel Garcia-Perez, Quiliano Perez-Tarrero, Javier Lorca-Hernando, 2013
    close
    A Method and a System for scheduling the downlink in Long Term Evolution (LTE) networks based on Quality of Service (QoS) The method comprises: performing a packet scheduling for a plurality of user terminals (UEs) based on information regarding QoS classes, said information regarding QoS classes is included in QoS class identifiers received from an Evolved Packet Core providing communication services to said user terminals, said method further comprising receiving channel quality indicators from said plurality of user terminals and performing said scheduling also on the basis of said received channel quality indicators. The system of the invention is arranged to implement the method of the invention.
    close
    @patent{ameigeirasgutierrezmethod2013,
    	title = {A {Method} and a {System} for {Scheduling} the {Downlink} in {Long} {Term} {Evolution} (lte) {Networks} {Based} on {Quality} of {Service} (qos)},
    	url = {https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2013127665},
    	abstract = {A Method and a System for scheduling the downlink in Long Term Evolution (LTE) networks based on Quality of Service (QoS) The method comprises: performing a packet scheduling for a plurality of user terminals (UEs) based on information regarding QoS classes, said information regarding QoS classes is included in QoS class identifiers received from an Evolved Packet Core providing communication services to said user terminals, said method further comprising receiving channel quality indicators from said plurality of user terminals and performing said scheduling also on the basis of said received channel quality indicators. The system of the invention is arranged to implement the method of the invention.},
    	language = {en},
    	assignee = {TELEFONICA, S.A., International Application No. PCT/EP2013/053324, Publication No. WO/2013/127665},
    	urldate = {2021-03-23},
    	author = {Ameigeiras, Pablo and Navarro-Ortiz, Jorge and Lopez-Soler, Juan Manuel and Garcia-Perez, Raquel and Perez-Tarrero, Quiliano and Lorca-Hernando, Javier},
    	month = September,
    	year = {2013},
    	keywords = {A Method and a System for Scheduling the Downlink in Long Term Evolution (lte) Networks Based on Quality of Service (qos)}
    }
    close