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  • Centralized and distributed approaches to control optical point-to-multipoint systems near-real-time 

    Shakespear Miles, Hailey Josephine; Lin, Q.; Barzegar, Sima; Ruiz Ramírez, Marc; Chen, X.; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers, 2024-05-01)
    Article
    Open Access
    Optical point-to-multipoint (P2MP) connectivity based on digital subcarrier multiplexing (DSCM) has been shown as a solution for the metro-access segment that is able to reduce capital and operational costs and support the ...

  • Using convolutional neural networks for blocking prediction in elastic optical networks 

    Nourmohammadi, Farzaneh; Parmar, Chetan; Wings, Elmar; Comellas Colomé, Jaume (Multidisciplinary Digital Publishing Institute, 2024-02-28)
    Article
    Open Access
    This paper presents a study on connection-blocking prediction in Elastic Optical Networks (EONs) using Convolutional Neural Networks (CNNs). In EONs, connections are established and torn down dynamically to fulfill the ...

  • SDN-based band-adaptive quality assurance scheme in support of heterogenous B5G services over sliceable multi-band optical networks 

    Pagès Cruz, Albert; Agraz Bujan, Fernando; Spadaro, Salvatore (2023-02)
    Article
    Restricted access - publisher's policy
    The rise of traffic intensive services and applications is pushing the limits of conventional single band Wavelength Division Multiplexing (WDM) optical networks. As an answer to this challenge, new data plane technologies ...

  • Context-based e2e autonomous operation in B5G networks 

    Wang, Shaoxuan; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Multidisciplinary Digital Publishing Institute (MDPI), 2024-03-01)
    Article
    Open Access
    The research and innovation related to fifth-generation (5G) networks that has been carried out in recent years has decided on the fundamentals of the smart slice in radio access networks (RANs), as well as the autonomous ...

  • Optimal design of cost-effective OXC and ROADM nodes to maximize the throughput of mesh-based u-DWDM metro-access networks 

    Sarmiento Hernández, Samael; Pagès Cruz, Albert; Spadaro, Salvatore; Lázaro Villa, José Antonio (Springer, 2023-06-22)
    Article
    Open Access
    Metro-access networks will play a primary role in future network fabrics, enabling connectivity among different actors such as 5G-based radio stations, edge datacenters, businesses, and home users. To provide such heterogeneous ...

  • Evaluating scalability, resiliency, and load balancing in software-defined networking 

    Barbecho Bautista, Pablo; Comellas Colomé, Jaume; Urquiza Aguiar, Luis Felipe (Multidisciplinary Digital Publishing Institute (MDPI), 2023-12-04)
    Article
    Open Access
    With emerging technologies like cloud computing and big data, managing traditional networks has become more demanding. Software-defined networking (SDN) promises faster implementation, flexibility, and simplified network ...

  • DARIUS: a digital twin to improve the performance of quantum key distribution 

    Ahmadian, Seyed Morteza; Ruiz Ramírez, Marc; Comellas Colomé, Jaume; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2024-03-01)
    Article
    Open Access
    Polarization encoded Quantum Key Distribution (QKD) is attracting great attention as it generates unlimitedly and unconditionally secure keys for different use cases. Despite its theoretical excellence based on quantum ...

  • Autonomous flow routing for near real-time quality of service assurance 

    Barzegar, Sima; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (2024-04)
    Article
    Open Access
    The deployment of beyond 5G and 6G network infrastructures will enable highly dynamic services requiring stringent Quality of Service (QoS). Supporting such combinations in today’s transport networks will require high ...

  • LUT-free carrier recovery for intradyne optical DPSK receivers in udWDM-PON 

    Ghasemi, Saeed; Tabares Giraldo, Jeison; Polo Querol, Víctor; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2019-03-15)
    Article
    Open Access
    We present a lookup table (LUT)-free carrier recovery architecture for intradyne optical DPSK receivers that reduce the required digital signal processing hardware resources, power consumption as well as total process ...

  • Demonstration of continuous multiple access with homodyne and image-rejection heterodyne coherent receivers using directly modulated laser transmitters 

    Masanas Jiménez, Miquel; Tabares Giraldo, Jeison; Cano Valadez, Iván Nicolás; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2023-07)
    Article
    Open Access
    This work presents a comprehensive set of experiments for the multipoint-to-point coherent passive optical network (PON), where the wavelength locking between the optical network unit (ONU) and optical line termination ...

  • Fast wavelength thermal tuning of DFB lasers for ultra dense WDM-PONs 

    Tabares Giraldo, Santiago; Polo Querol, Víctor; Prat Gomà, Josep Joan (2022-10-15)
    Article
    Open Access
    Thermal tunability for distributed feedback lasers is generally done at slow tuning speed. We study laser current boosting and implement a pre-equalization stage for short wavelength jump, improving the tuning time to the ...

  • Network traffic analysis under emerging beyond-5G scenarios for multi-band optical technology adoption 

    Ruiz Ramírez, Marc; Hernández Gutiérrez, José Alberto; Quagliotti, Marco; Hugues Salas, Emilio; Riccardi, Emilio; Rafel, Albert; Velasco Esteban, Luis Domingo; González de Dios, Oscar (Optical Society of American (OSA), 2023)
    Article
    Open Access
    The recently created ITU-T Focus Group Network 2030 is leading network operators to identify the requirements and use cases that networks are expected to fulfill for the short, medium, and long term within the current ...

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