Adaptive Routing
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Comparing OSNR based policies for an adaptive-alternative IA-RWA algorithm applied to all-optical networks
We propose two policies to select the route for an adaptive-alternative routing algorithm for all-optical networks. We use the NrPSR to find the Nr routes with lower cost for a given source-destination pair according to a cost function expanded in a power series (PSR) in which the coefficients are determined by a Particle Swarm Optimizer (PSO). The selected
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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2. Um esquema de seleção de rotas para o balanceamento de segurança e desempenho em redes em malha sem fio / Um Esquema de Seleção de Rotas para o Balanceamento de Segurança e Desempenho em Redes em Malha Sem Fio
Wireless mesh networks (WMNs) have been used to support multimedia applications on different domains, such as health care and entertainment, that require high levels of security and performance simultaneously. Those networks comprise of a wireless backbone of routers that cooperate to provide data communication among mobile devices, such as notebooks, PDAs a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/05/2011
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3. Modelo markoviano de decisão para o roteamento adaptativo em redes WDM totalmente ópticas / Markov decision model for adaptive routing in all-optical WDM networks
As redes ópticas WDM têm sido cada vez mais utilizadas, visto que aproveitam melhor a capacidade de transmissão das fibras ópticas. Com o intuito de evitar conversões óptico-elétricas na transmissão de dados entre os nós da rede, dispositivos capazes de manter a comutação dos sinais no domínio óptico são instalados em cada nó, tornando a rede
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/03/2011
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4. Roteamento utilizando potencial de entrega em redes tolerantes a atrasos
Redes Tolerantes a Atrasos (Delay Tolerant Network - DTN) são redes sujeitas a interrupções frequentes, altos atrasos e elevadas taxas de erro. Nessas redes os nodos são móveis e fazem o papel de roteadores, armazenando e fazendo o repasse das mensagens que precisam ser entregues. O foco deste trabalho está nas redes DTN estocásticas, nas quais as mud
Publicado em: 2010
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5. A service-oriented infrastructure for ecological niche modelling. / Uma infraestrutura orientada a serviços para a modelagem de nicho ecológico.
Ecological niche modelling combines environmental data and information about the occurrence of a species to obtain models to describe its probabilistic distribution in a region. Computational algorithms generate models based on the hypothesis that, if a species was found under the conditions which define its niche, then it may survive in any place which offe
Publicado em: 2009
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6. ANÁLISE DA DINÂMICA DA ATENUAÇÃO POR CHUVAS EM REGIÕES TROPICAIS / DYNAMIC ANALYSIS OF RAIN ATTENUATION IN TROPICAL REGIONS
The main effect causing non-availability in radio communication systems operating in frequencies above 10GHz, is the rain attenuation, particularly the heavy convective rain that is predominant in tropical regions. This thesis presents a detailed study and modelling of the dynamics of rain attenuation in terrestrial links and earthspace links, based on data
Publicado em: 2008
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7. Three-dimensional cutting and packing problems and integration with vehicle routing / Problemas de corte e empacotamento tridimensional e integração com roteamento de veiculos
The wide-scale adoption of the containers made the development of the multimodal transport possible. Nowadays, shipment of boxes in containers is an important activity for companies that have in the load transport a logistic factor of high cost. This work presents the development and the application of metaheuristics with adaptive memory in order to solve th
Publicado em: 2006
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8. Analysis of routing algorithms based in ants. / Análise de algoritmos de roteamento baseados em formigas.
Ant Colony Routing is an adaptive method for routing in communication networks, and several algorithms have been proposed in the last years based on this framework. All these algorithms show excellent results, proving their efficiency and efficacy. This work presents the results of the performance of the main algorithms found in the literature, and based on
Publicado em: 2006
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9. Proposta de um novo algoritmo de roteamento para redes de sensores sem fio e estudo de uma técnica para prover QOS nestas redes
Este trabalho apresenta duas contribuições principais. A primeira propõe um novo e eficiente algoritmo de roteamento para Redes de Sensores Sem Fio chamado Inter Cluster Routing Algorithm (ICA) baseado no algoritmo LEACH (Low-Energy Adaptive Clustering Hierarchy). O ICA foi desenvolvido para redes de sensores que coletam informações periodicamente duran
Publicado em: 2006
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10. Aplicação de uma abordagem adaptativa de busca tabu a problemas de roteirização e programação de veículos.
This project consists in the refinement of the tabu search adaptive approach HTSA (PUREZA, 1996) and the analysis of its performance when applied to the classical Vehicle Routing Problem and to the Vehicle Routing Problem with Time Windows. HTSA promotes the integration of intensification and diversification strategies through the systematic variation of the
Publicado em: 2005
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11. Uma estrategia de roteamento OSPF adaptativo baseado em estimação de banda / An adaptive OSPF routing strategy based on bandwidth estimation
Internet increase and diversity demand "smart" tools that could make possible to routing protocols self-adapt to network current state (its topology and congestion situation). Smart tools, although, can result in great processing and communication overload. This work presents, besides a new adaptive OSPF routing strategy based on bandwidth estimations, a sim
Publicado em: 2004
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12. Estudo de algoritmos de alocação de rota e comprimento de onda em redes opticas
In this work we studied Routing and Wavelength Assignment (RW A) algorithms on Wavelength Division Multiplexing Optical Networks, using discrete event simulation and analytical modeling. Fixed routing, alternate routing and adaptive routing algorithms were implemented. The effect of the number of wavelengths per optical fiber, number of optical fibers and us
Publicado em: 2003