Optical Qos
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Proposal of a new approach for BER evaluation of multirate, multiservice OCDMA systems / Proposta de uma nova abordagem para o cálculo da BER de sistemas OCDMA de múltiplas taxas e multiserviços
The continuous evolution of the optical communication technology in the last few years has allowed the growing users demand for higher bandwidth to be satisfactorily attended. This new demand is mainly attributed to the growing popularity of bandwidth-intensive networking applications, such as Internet protocol television (IPTV), high-definition television (
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/08/2012
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2. Increasing energy efficiency in OCDMA network via distributed power control
In this work, we investigate the utilization of transmission power control as mechanism to increase the energy efficiency in optical code division multiplexing access (OCDMA) networks. We have modeled the energy efficiency considering the optical fiber transmission and network infrastructure as encoders, decoders and star coupler. In the analyzed scenario, t
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2012-06
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3. Heuristic solutions related to challenges of optical burst switching paradigm
Several optical network switching paradigms have been under intensive research to support rapidly increasing bandwidth requirements. Of all these paradigms, optical burst switching (OBS) is a promising switching paradigm for the next-generation Internet infrastructure. Despite the significant contributions of OBS to high speed networks such as dynamic connec
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2011-12
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4. Controle dos efeitos da mistura de quatro ondas (FWM) para melhoria no gerenciamento do QoS óptico em redes GMPLS/DWDM. / Control of the four wave mixing (FWM) effects for improvement in the optical QOS management in GMPLS /DWDM networks.
This work investigates the effects of the Four-Wave Mixing (FWM) during the lightpaths establishment in a GMPLS/DWDM (Generalized Multiprotocol Label Switching / Dense Wavelength Division Multiplexing) network. In order to minimize their impacts and thus reduce network blocking, strategies based on RSVP-TE (Resource Reservation Protocol- Traffic Engineering)
Publicado em: 2011
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5. Uma alternativa a inundação baseada em tabelas de dispersão para planos de controle de redes opticas / A hash table based flooding alternative for optical networks control plane
The transport layer structure of the Internet is moving towards a model of highspeed routers interconnected by intelligent optical core networks. A consensus has been reached on wavelength division multiplexing (WDM) as the way to increase the transmission capacity. However there are few proposals for distributed control planes under dynamic Quality of Servi
Publicado em: 2008
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6. Performance analysis of WDM/OCDM burst switching networks / Analise de desempenho de redes opticas hibridas WDM/OCDM
Neste trabalho investigamos o desempenho da tecnologia híbrida de multiplexação por divisão de comprimento de onda e multiplexação por divisão de códigos ópticos (WDM/OCDM) para rede óptica comutada por rajada e roteada por comprimento de onda (WR-OBS). Descrevemos uma arquitetura para o roteador de borda WDM/OCDM e derivamos expressões para a pro
Publicado em: 2008
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7. Um Estudo da Qualidade de Serviço em redes IP sobre DWDM / A study of the quality of services on IP over DWDM networks
A significant effort has been made in the last years for providing Quality of Service (QoS) in generic communication network, using Internet Protocol (IP). Proposed models by the IETF Internet Task Force Engineering, as Best-effort Services, Int-Serv Integrated Services and DiffServ Differentiated Services, provide and guarantee QoS in these networks. On the
Publicado em: 2006
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8. Desenvolvimento de algoritmos de roteamento e atribuição de comprimentos de onda para as redes opticas inteligentes e transparentes / Development of routing and wavelenght assignement algorithms for intelligent and transparent optical networks
Neste trabalho, apresentam-se algumas contribuições para o estudo de redes ópticas inteligentes e transparentes, por exemplo: Redes Ópticas Comutáveis Automaticamente (ASON), no que tange aos protocolos de roteamento e atribuição de comprimentos de onda para o estabelecimento de conexões fim-a-fim em ambientes distribuídos. Os resultados deste traba
Publicado em: 2006
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9. Analysis of optical CDMA systems / Análise de sistemas CDMA ópticos
The evolution of optical networks verified in the last few years has been characterized by the search for better bandwidth utilization efficiency. The successful implementation of practical code division for multiple access techniques (CDMA) in mobile communications systems has stimulated new investigations on this topic, particularly in the optical domain (
Publicado em: 2006
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10. 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