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Advisor(s)
Abstract(s)
Cada vez mais os operadores olham para os custos/consumos que as redes core actuais têm, sendo que este assunto tem sido recorrente em investigações académicas nos últimos anos. Actualmente os serviços de rede utilizam uma elevada largura de banda colocando o ónus nos operadores de rede de modo a fazerem uso dos recursos de rede de forma eficiente. Os grupos de standarização estão a fazer um progresso significativo ao tentar passar dos canais ópticos disponíveis, com velocidades de 10, 40 e 100 Gbps, até aos esperados 400 Gbps e ou até 1 Tbps nas redes core.
Recorrendo à plataforma de simulação IMB ILOG CPLEX (software que simula modelos matemáticos), este trabalho permitirá efectuar o estudo comparativo entre os diferentes modelos de optimização de custo de implementação e custo operacional para redes core IP (Internet Protocol) sobre WDM (Wavelength Division Multiplexing), com foco em técnicas de encaminhamento eficientes, tal como o bypass óptico. Tendo por base as topologias fixed-grid e flex-grid, as tecnologias em questão possibilitarão a utilização de canais com diferentes velocidades de transmissão da mesma fibra óptica (MLR). De modo a poder-se simular uma abordagem realista, utilizou-se uma rede Alemã fazendo uso da matriz de tráfego IP e da sua previsão de crescimento de tráfego anual (CAGR), segundo o VNI da Cisco, com base em informação estatística.
Comparando os diferentes modelos, conclui-se que tanto o custo de implementação como para o operacional nas redes flex-grid, estes são menores nas tradicionais redes fix-grid. Verificou-se que o custo de implementação reduziu 17.0% enquanto que o custo operacional reduziu 175.8%, face às redes fix-grid.
As redes flex-grid permitem assim, o transporte de volumes de tráfego mais elevados de forma mais eficiente devido à sua maior capacidade, eficiência energética e espectral dos canais de transmissão associados a este tipo de redes.
More and more operators look at the costs / consumptions that current core networks have, and this subject has been recurrent in academic research in recent years. Currently network services use a high bandwidth by placing the burden on network operators to make efficient use of network resources. Standarization groups are making significant progress in moving from the available optical channels, with speeds of 10, 40 and 100 Gbps, up to the expected 400 Gbps and up to 1 Tbps in the core networks. Using the IMB ILOG CPLEX simulation platform, this work will allow the comparative study of the different implementation cost optimization and operational cost models for Wavelength Division Multiplexing (WDM) Internet core networks. efficient routing techniques, such as optical bypass. Based on the fixed-grid and flex-grid topologies, the models in question will allow the use of channels with different transmission speeds of the same optical fiber (MLR). In order to simulate a realistic approach, a German network using the IP traffic matrix and its annual traffic growth forecast (CAGR), according to Cisco's VNI, was used based on statistical information. Comparing the different models, it is concluded that both the implementation cost and the operational cost in the flex-grid networks is lower than in the traditional fix-grid networks. The cost of implementation was reduced to 17.0% while the operational cost reduced 175.8% compared to the fixed grid networks. Flex-grid networks thus allow the transport of higher traffic volumes more efficiently due to their greater capacity, energy efficiency and spectral transmission channels associated with this type of networks.
More and more operators look at the costs / consumptions that current core networks have, and this subject has been recurrent in academic research in recent years. Currently network services use a high bandwidth by placing the burden on network operators to make efficient use of network resources. Standarization groups are making significant progress in moving from the available optical channels, with speeds of 10, 40 and 100 Gbps, up to the expected 400 Gbps and up to 1 Tbps in the core networks. Using the IMB ILOG CPLEX simulation platform, this work will allow the comparative study of the different implementation cost optimization and operational cost models for Wavelength Division Multiplexing (WDM) Internet core networks. efficient routing techniques, such as optical bypass. Based on the fixed-grid and flex-grid topologies, the models in question will allow the use of channels with different transmission speeds of the same optical fiber (MLR). In order to simulate a realistic approach, a German network using the IP traffic matrix and its annual traffic growth forecast (CAGR), according to Cisco's VNI, was used based on statistical information. Comparing the different models, it is concluded that both the implementation cost and the operational cost in the flex-grid networks is lower than in the traditional fix-grid networks. The cost of implementation was reduced to 17.0% while the operational cost reduced 175.8% compared to the fixed grid networks. Flex-grid networks thus allow the transport of higher traffic volumes more efficiently due to their greater capacity, energy efficiency and spectral transmission channels associated with this type of networks.
Description
Trabalho final de mestrado para obtenção do grau de Mestre em Engenharia de Electrónica e Telecomunicações
Keywords
Flex-grid Fixed-grid IP WDM Custo de implementação Implementation cost Custo operacional Functional cost Espectro Spectrum
Citation
ANICETO, Ruben José Dores - Análise comparativa entre o custo de implementação e o custo operacional numa rede core óptica. Lisboa: Instituto Superior de Engenharia de Lisboa, 2014. Dissertação de mestrado.
Publisher
Instituto Superior de Engenharia de Lisboa