Exploració per autor "Tomkos, Ioannis"
Ara es mostren els items 28-41 de 41
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On the benefits of FMF based data center interconnection utilizing MIMO-less PAM-M transceivers
Shariati, Mohammad Behnam; Diamantopoulos, Nikolaos-Panteleimon; Klonidis, Dimitrios; Comellas Colomé, Jaume; Tomkos, Ioannis (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Comunicació de congrés
Accés restringit per política de l'editorialSpace division multiplexing (SDM) has been proposed to cost-effectively increase the capacity of optical transmission systems. The cost savings can be realized by introducing some levels of spatial integration of elements. ... -
On the offline physical layer impairment aware RWA algorithms in transparent optical networks: state-of-the-art and beyond
Azodolmolky, Siamak; Pointurier, Yvan; Klinkowski, Miroslaw; Marín Tordera, Eva; Careglio, Davide; Solé Pareta, Josep; Angelou, Marianna; Tomkos, Ioannis (IEEE Press and Wiley, 2009-02-18)
Text en actes de congrés
Accés obertIn transparent optical networks with no regeneration, the problem of capacity allocation to traffic demands is called "Roting and Wavelength Assignment". Much work on this topic recently has focused on the dynamic case, ... -
Optical subsystems for next generation access networks
Lázaro Villa, José Antonio; Polo Querol, Víctor; Schrenk, Bernhard; Bonada Bo, Francesc; Cano Valadéz, Iván Nicolás; López Pastor, Eduardo Tommy; Kazmierski, Christophe; de Valicourt, Guilhem; Brenot, Romain; Bauwelinck, Johan; Xing-Zhi, Qiu; Ossieur, P.; Forzati, Marco; Rigole, Jean-Pierre; Monroy, I.T; Tangdiongga, E.; Morant, Maryland; Nicolau, L.; Teixeira, A.L.; Erasme, D.; Klonidis, Dimitrios; Tomkos, Ioannis; Prat Gomà, Josep Joan; Kouloumentas,, Christos; Avramopoulos, Hércules (2011)
Text en actes de congrés
Accés restringit per política de l'editorialRecent optical technologies are providing higher flexibility to next generation access networks: on the one hand, providing progressive FTTx and specifically FTTH deployment, progressively shortening the copper access ... -
Options for cost-effective capacity upgrades in backbone optical networks
Shariati, Mohammad Behnam; Rivas Moscoso, José Manuel; Klonidis, Dimitrios; Tomkos, Ioannis; Ben Ezra, Shalva; Jiménez, Felipe; Marom, Dan M.; Sayyad Khodashenas, Pouria; Comellas Colomé, Jaume; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialUpgrading the capacity of backbone optical networks while delivering contents to the end-users with a reduced cost per bit is a day-by-day challenge of network operators. In this paper, we first discuss several mid-term ... -
Performance issues in Optical Burst/Packet Switching
Klinkowski, Miroslaw; Careglio, Davide; Aracil Rico, Javier; Azodolmolky, Siamak; García Haro, Juan; Gunreben, Sebastian; Hu, Guoqiang; Izal, Mikel; Kimsas, Andreas; Veiga Gontán, Javier; Tzanakaki, Anna; Tomkos, Ioannis; Spadaro, Salvatore; Scharf, Joachim; Perelló Muntan, Jordi; Pavón Mariño, Pablo; Morató, Daniel; Magaña, Eduardo; Köhn, Martin (Springer, 2009-04-01)
Capítol de llibre
Accés restringit per política de l'editorialThis chapter summarises the activities on optical packet switching (OPS) and optical burst switching (OBS) carried out by the COST 291 partners in the last 4 years. It consists of an introduction, five sections with ... -
Physical layer evaluation of OFDM-based access networks
Cano Valadéz, Iván Nicolás; Santos Blanco, M. Concepción; Prat Gomà, Josep Joan; Krimmel, H.G.; Kavatzikidis, T.; Giacoumidis, E.; Tomkos, Ioannis (IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, we present a physical layer parameter optimization of direct-detection optical OFDM techniques at bitrates of 10 Gb/s and 40 Gb/s using an intensity modulation and two types of field modulation transmitte ... -
Routing and wavelength assignment for transparent optical networks with QoT estimation inaccuracies
Azodolmolky, Siamak; Pointurier, Yvan; Angelou, Marianna; Solé Pareta, Josep; Tomkos, Ioannis (2010)
Text en actes de congrés
Accés restringit per política de l'editorialWe show how inaccuracies of Quality of Transmission (QoT) estimations, caused by imperfect models and lack of monitors in transparent optical networks, can be mitigated using a novel routing and wavelength assignment algorithm. -
SARDANA: an all-optical access-metro WDM/TDM-PON
Spirou, S.; Tomkos, Ioannis; Prat Gomà, Josep Joan; Segarra Mullerat, Josep; Sales Zaragozá, Vicente; Lázaro Villa, José Antonio; Chanclou, Philippe; Soila, Risto; Teixeira, A.; Tosi Beleffi, Giorgio M. (2011)
Text en actes de congrés
Accés obertA new optical access network, named “Scalable Advanced Ring-based passive Dense Access Network Architecture” (SARDANA), is presented. It transparently integrates WDM metro and TDM PON access technologies, implementing ... -
Simple intradyne PSK system for UDWDM-PON
Prat Gomà, Josep Joan; Polo Querol, Víctor; Zakynthinos, P.; Cano Valadéz, Iván Nicolás; Tabares, J.; Fàbrega Sánchez, Josep Maria; Klonidis, Dimitrios; Tomkos, Ioannis (2012-12-17)
Article
Accés obertA homodyne coherent receiver for ultra-dense WDM-PON with off the shelf components is presented. It consists of a conventional DFB, phase switched clock signal, an optical coupler instead of a 90º hybrid, balanced ... -
Spectrally and spatially flexible optical networks: recent developments and findings
Shariati, Mohammad Behnam; Klonidis, Dimitrios; Marom, Dan M.; Comellas Colomé, Jaume; Velasco Esteban, Luis Domingo; Tomkos, Ioannis (Institute of Electrical and Electronics Engineers (IEEE), 2018-09-27)
Text en actes de congrés
Accés restringit per política de l'editorialSpace division multiplexing (SDM) has been proposed as the ultimate solution to address the capacity crunch of optical transport networks. The efficient utilization of SDM requires some forms of spatial integration which ... -
Techno-economics of resilient extended FTTH PONs
Prat Gomà, Josep Joan; Lázaro Villa, José Antonio; Chatzi, Sotiria; Tomkos, Ioannis (IEEE, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialThis work analyses different architectures of protected FTTH passive optical networks in terms of device and infrastructure requirements and costs, considering different home density scenarios and volume projections. The ... -
Technologies for cost-effective udWDM-PONs
Prat Gomà, Josep Joan; Cano Valadez, Iván Nicolás; Presi, Marco; Tomkos, Ioannis; Klonidis, Dimitrios; Vall-llosera, Gema; Brenot, Romain; Pous, R.; Papastergiou, george; Rafel, Albert; Ciaramella, Ernesto (2016-01-15)
Article
Accés obertNew technologies for ultradense WDM-PON (udWDM-PON), enabled by coherent techniques and low-cost devices, are developed for an efficient utilization of the optical spectrum, revealing that the “Wavelength-to-the-User” ... -
Test-bed functionality of the SARDANA hybrid NG-PON
Prat Gomà, Josep Joan; Polo Querol, Víctor; Lázaro Villa, José Antonio; Bonada, F.; López Pastor, Eduardo Tommy; Schrenk, Bernhard; Omella, M.; Saliou, F.; Le, Q.T.; Chanclou, P.; Leino, D.; Soila, R.; Spirou, S.; Costa, L.; Teixeira, A.; Tosi-Beleffi, G.M.; Klonidis, Dimitrios; Tomkos, Ioannis (2011)
Text en actes de congrés
Accés restringit per política de l'editorialThe tests with broadband multimedia services of the SARDANA multi-layer prototype prove the feasibility of scalable hybrid DWDM/TDM-PON FTTH networks with resilient optically-integrated ring-trees architecture. -
Wavelength-tuneable remote node for enhanced resilience and optimization of WDM access networks
Lázaro Villa, José Antonio; Bonada Bo, Francesc; Schrenk, Bernhard; Costa, Liliana; Teixeira, Marco Antonio; Chatzi, Sotiria; Klonidis, Dimitrios; Tomkos, Ioannis; Prat Gomà, Josep Joan (IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialA remote node design with a wavelength tuneable optical add/drop element is presented and experimentally demonstrated for application in a resilient ring+tree access network architecture. The flexibility of the network ...