Exploració per autor "Ruiz Ramírez, Marc"
Ara es mostren els items 138-157 de 181
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Quantum bit retransmission using universal quantum copying machine
Iqbal, Masab; Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Napoli, Antonio; Pedro, João; Costa, Nelson (Institute of Electrical and Electronics Engineers (IEEE), 2022)
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Accés obertQuantum internet, which is expected to be a combination of quantum and classical networks, promises to provide information-theoretic security for data exchange. Classical networks have well-established protocols for reliable ... -
Real-time optical spectrum monitoring in filterless optical metro networks
Shariati, Mohammad Behnam; Ruiz Ramírez, Marc; Fresi, Francesco; Sgambelluri, Andrea; Cugini, Filippo; Velasco Esteban, Luis Domingo (2020-06-17)
Article
Accés obertFilterless optical networks (FONs) have been proposed as a feasible solution for optical metro networks. In addition, as a result of the shorter distance compared to core optical networks, direct detection optical transmission ... -
Real-time spectrum surveillance in filterless optical networks
Shariati, Mohammad Behnam; Ruiz Ramírez, Marc; Sgambelluri, Andrea; Cugini, Filippo; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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Accés restringit per política de l'editorialA monitoring system exploiting data analytics and cost-effective optical spectrum analyzers with under 1.2GHz resolution is proposed. Its performance is demonstrated in a filterless network experimental test-bed. The system ... -
Reducing virtual network reconfiguration and traffic losses under multiple traffic anomalies
Pérez Vela, Alba; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Optical Society of American (OSA), 2016)
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Accés restringit per política de l'editorialMultiple OD traffic anomalies can arise exceeding pre-planned capacity and causing congestion. We propose to detect anomalous and suspicious ODs to reduce virtual network reconfiguration and total traffic losses. Results ... -
Reinforcement learning for autonomous traffic flow capacity management
Barzegar, Sima; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2023)
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Accés obertAs the dynamicity of the traffic increases, the need for self-network operation becomes more evident. One of the solutions that might bring cost savings to network operators, is that of the dynamic capacity management of ... -
Reinforcement learning-based autonomous multilayer network operation
Barzegar, Sima; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2020)
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Accés obertWe propose an Intent-Based Networking solution based on Reinforcement Learning (RL). RL-based intents with specific operational objectives and coordinated operation between network layers are developed. Results show service ... -
Reliable and accurate autonomous flow operation based on off-line trained reinforcement learning
Barzegar, Sima; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2021)
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Accés obertA RL agent trained offline for reliability and able to refine its policies during online operation is proposed. Results for three illustrative flow automation use cases show remarkable performance with extraordinary ... -
Reliable quantum communication
Iqbal, Masab; Ahmadian, Seyed Morteza; Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2023)
Text en actes de congrés
Accés obertThe quantum internet, which will be a hybrid of quantum and classical networks, is expected to provide information-theoretic security for data transmission. Classical networks have well-established protocols for reliable ... -
Reoptimization of dynamic flexgrid optical networks after link failure repairs
Zotkiewicz, Mateusz; Ruiz Ramírez, Marc; Klinkowski, Miroslaw; Pioro, Michal; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2015-01-01)
Article
Accés obertIn dynamic flexgrid optical networks, the usage of capacity may not be optimal due to the permanent process of setting up and tearing down connections, which, if not controlled, leads to spectrum fragmentation and, as a ... -
Requirements to support cloud, video and 5G services on the telecom cloud
Asensio García, Adrián; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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Accés restringit per política de l'editorialThe growth of data traffic related to datacenter (DC) interconnection and the expected explosion of services requiring intensive use of telecom networks, such as video and mobile services, are contributing to the increment ... -
Resources optimization in GMPLS-based optical multilayer networks
Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (2009-06-09)
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Routing and scheduled spectrum allocation for transfer-based datacenter connections
Asensio Garcia, Adrian; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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Accés restringit per política de l'editorialCreating datacenter (DC) federations allows DC operators to reduce costs and increase their revenues from using under-utilized resources as well as to expand their geographical coverage aiming to improve users' Quality of ... -
Scalability of telecom cloud architectures for live-TV distribution
Asensio Carmona, Adrian; Contreras, Luis Miguel; Ruiz Ramírez, Marc; López Álvarez, Victor; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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Accés restringit per política de l'editorialA hierarchical distributed telecom cloud architecture for live-TV distribution exploiting flexgrid networking and SBVTs is proposed. Its scalability is compared to that of a centralized architecture. Cost savings as high ... -
Secure optical communications based on fast cryptography
Velasco Esteban, Luis Domingo; Iqbal, Masab; Ruiz Ramírez, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2023)
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Accés obertAlthough security solutions, like Advanced Encryption Standard (AES) and ChaCha, are common at the packet layer, secure transmission at the optical layer is still not implemented. The reason is that such cryptographic ... -
Self-learning approaches for real optical networks
Ruiz Ramírez, Marc; Boitier, Fabien; Layec, Patricia; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2019)
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Accés obertSelf-learning approaches to facilitate the deployment of ML algorithms in real networks are analyzed and their performance evaluated through an illustrative use case. Results show large benefits of collective self-learning ... -
Service and resource differentiation in shared-path protection environments to maximize network operator's revenues
Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Perelló Muntan, Jordi; Spadaro, Salvatore; Comellas Colomé, Jaume (IEEE Press. Institute of Electrical and Electronics Engineers, 2011-02)
Article
Accés obertNetwork operators are facing hard competition for opportunities in the telecommunications market, forcing network investments to be carefully evaluated before the decision-making process. A great part of core network operators’ ... -
Serving multicast requests on single layer and multilayer flexgrid networks
Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2015-03)
Article
Accés restringit per política de l'editorialAdvanced services require a high bitrate, e.g., multigigabit, multicast connectivity beingprovided by core transport networks. Multicast services can be supported either by one single tree connecting the source to every ... -
Signal overlap for efficient 1+1 protection in elastic optical networks (EONs)
Cugini, Filippo; Sambo, Nicola; Foggi, Tomasso; Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo; Castoldi, Piero (Optical Society of American (OSA), 2017)
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Accés restringit per política de l'editorialAn innovative transmission technique enabling signal overlap is introduced for spectrally-efficient 1+1 protection. Simulation results show that the proposed technique successfully reduces the overall amount of occupied ... -
Single-path provisioning with multi-path recovery in flexgrid optical networks
Castro Casales, Alberto; Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2012)
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Accés restringit per política de l'editorialThe new flexgrid technology, in opposition to the fixed grid one traditionally used in wavelength switched optical networks (WSON), allows allocating the spectral bandwidth needed to convey heterogeneous client demand ... -
Smart filterless optical networks based on optical spectrum analysis
Ruiz Ramírez, Marc; Sgambelluri, Andrea; Cugini, Filippo; Velasco Esteban, Luis Domingo (2019)
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Accés obertDynamic network operations can produce power fluctuations of the established connections in filterless optical networks. In addition, the gridless nature of filterless networks make that some ...