Transparent Optical Network
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. A Multilayer Approach for Optical Network Planning
With the increase in demand to Backbone networks, one became fundamental the application of new telecommunication technologies for efficient use of devices and optical links, such as xPSK modulations with dual polarization, dispersion compensating fibers, coherent detection and digital processing signals. Thus, network planning using analytical models have b
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-03
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2. Optical cryptography through analog control of amplitude and delay of spectral slices: anlysis for NRZ and DQPSK signals. / Criptografia Ãptica mediante controle analÃgico da amplitude e do atraso de fatias espectrais: anÃlise para sinais NRZ e DQPSK.
This work investigates a technique to encrypt the optical signal for Transparent Optical Network, TON, in order to safeguard the confidentiality and guarantee the security of informations that are transmitted through the Telecommunications Network. The technique is assessed on the physical layer of the reference model for open systems interconnection, OSI, a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/11/2012
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3. A ESCOLHA DA MELHOR ENTRE AS MENORES ROTAS EM REDES ÓPTICAS TRANSPARENTES / THE CHOICE OF THE BEST AMONG THE SHORTEST ROUTES IN TRANSPARENT OPTICAL NETWORKS
Esta dissertação introduz o problema da escolha da melhor combinação entre as M combinações de menores caminhos no planejamento de rotas para provisão dinâmica de circuitos ópticos transparentes. Para solucionar tal problema de forma otimizada (menor caminho e balanceamento de carga), é proposto um novo algoritmo de roteamento fixo, chamado Melhor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/03/2010
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4. Algoritmos RWA para redes ópticas transparentes considerando limitações da camada física / RWA algorithms for optical transparent networks considering physical impairments
With the proliferation of new multimedia services such as VoIP and IP-TV, an increasing demand for high rates of data transfer is being seen. Thus, the demand on the core of the network is continuously growing, so its capacity must increase in the same ratio to provide a reliable service to end users. The Transparent Optical Networks with WDM appears as a so
Publicado em: 2010
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5. Systemic analysis of noise penalties all-optical network / AnÃlise sistÃmica das penalidades de ruÃdo nas redes Ãpticas transparentes
In this thesis, the routing and wavelength assignment processes are addressed. Besides of considering the network layer resources (number of available wavelengths in a link), the impact of physical layer effects in the transmitted optical signals is analyzed for both processes. The optimization of the wavelength assignment process is obtained by minimizing t
Publicado em: 2007
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6. ContribuiÃÃes ao algoritmo de roteamento para redes Ãpticas baseado na figura de ruÃdo e nas penalidades fÃsicas / Contributions to the routing algorithm for optical networks based on noise figure and physical impairments
This dissertation demonstrates a novel dynamic routing algorithm for transparent optical networks based on physical layer impairments such as, amplifier noise accumulation, amplifier gain saturation and device losses along lightpaths. The metric of the algorithm is based on the calculation of the noise figure using the well known formulation for a cascade of
Publicado em: 2006
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7. A methodology for provisioning and differentiation of optical QoS in FWN impaired transparent optical networks / Uma abordagem para aprovisionamento e diferenciação de QoS optico na presença de FWM em redes opticas transparentes
This Thesis proposes methodologies for differentiated optical QoS in a multi-client scenario, in which client networks (e.g. IP/MPLS and SDH) dynamically request lightpaths from a transparent optical network in which Four-Wave Mixing (FWM) imposes crosstalk among lightpaths. In order to meet Optical Service Level Agreement (OSLA), it is proposed an integrate
Publicado em: 2005
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8. PROJETO DE TOPOLOGIAS VIRTUAIS PARA REDES ÓPTICAS MULTISERVIÇO
Optical communication systems have emerged as the best solution for large scale data transport network implementation, providing optical channels with very high bit rates and covering large distances with low error probability. The entire bandwidth of the optical fibers became available with the development of the wavelength division multiplexing (WDM) techn
Publicado em: 2005
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9. Dye incorporation in polyphosphate gels: synthesis and theoretical calculations
In this work we described theoretical calculations on the electronic structure and optical properties of the dyes crystal violet and malachite green based in semiempirical methods (Parametric Method 3 and Intermediate Neglect of Differential Overlap / Spectroscopic - Configuration Interaction) and the synthesis of a new hybrid material based upon the incorpo
Materials Research. Publicado em: 2003-06