Submitted by Fernanda Ciolfi (fernanda.ciolfi@puc-campinas.edu.br) on 2016-08-16T18:29:14Z No. of bitstreams: 1 Juliano Silva Mar?al.pdf: 14418180 bytes, checksum: e94d4d5adc61aeda0c174d60cabfa216 (MD5) / Made available in DSpace on 2016-08-16T18:29:14Z (GMT). No. of bitstreams: 1 Juliano Silva Mar?al.pdf: 14418180 bytes, checksum: e94d4d5adc61aeda0c174d60cabfa216 (MD5) Previous issue date: 2016-06-27 / Pontif?cia Universidade Cat?lica de Campinas ? PUC Campinas / In the current technological environment from the point of view of optical transmission, multiplexing technologies for wavelength division (Wavelength Oivision Multiplexing - WOM) working with fixed 50 GHz grid will not support the existing demand for the next 10 years. This scarcity occurs due to several reasons: channels with fixed width of 50 GHz, limitation of 80 optical channels per link, maximum transmission capacity of 100 Gb / s per channel. In search of viable forward solutions to this paradigm that presents technology proposal comes known as Optical Networks Elastic (Elastic Optical Network - EON), a technology that enables optical channels with bandwidths of 3,125, 6,250, 12,500, 25 and 50 GHz transmission capability of rates supported by the WOM yet rates of 200 Gb / s, 400 Gb / s and 1 Tb / s, and can be implemented on the same optical infrastructure WOM already existing thus corresponding to a highly cost less if compared to deployment of new networks. The efficiency of this proposed new technology is mainly in routing algorithms and spectral assignment (Routing and Spectrum Assignment - RSA) aimed at maximizing network availability of resources by reducing the likelihood of blocking. The use of RSAs on the EONS networks fragmentation results in the generation of reducing the availability of network resources. Within this scenario, the present work-studies the feasibility of defragmentation use based on the relocation of the link to submit further fragmentation indexo This paper studies the adoption of two indices: consecutiveness index and more FSUs index busy, both indexes allow the selection of the link to be defragmented. The results of this study were obtained from the development of version 5 of the simulator Elastic Optical Network Simulator (EONSim). To obtain the results, different transmission rates were evenly distributed for each traffic load between 45 and 100 Erlang (E), the First-Fit RSA (FF) was adopted for ali the simulations to reduce the defragmentation processing were performed from an R number of released connections (R = 10, R = 50 and R = 100). For the scenario using the consecutiveness index gain of up to 44 was measured to 55 E and average gain of 15 compared to results without defragmentation scenario for the use of higher index number of occupied FSUs, gain was observed 26 to 55 E and average gain of 10. From the results it can be concluded that the adoption of defragmentation strategies for eons networks are likely to be used since they have decreased blocking probability and increase the availability of network resources. / Na atual conjuntura tecnol?gica do ponto de vista de transmiss?es ?pticas, as tecnologias de multiplexa??o por divis?o de comprimento de onda (Wavelength Oivision Multiplexing - WOM) que trabalham com grade fixa de 50 GHz n?o ir?o comportar a demanda existente para os pr?ximos 10 anos. Esta escassez ocorre por v?rios motivos: canais com largura fixa de 50 GHz, limita??o de 80 canais ?pticos por enlace, capacidade m?xima de transmiss?o de 100 Gb/s por canal. Em busca de solu??es vi?veis frente a este paradigma que se apresenta, surge a proposta da tecnologia conhecida como Redes ?pticas El?sticas (Elastic Optical Network- EON), uma tecnologia que permite canais ?pticos com larguras de banda de 3.125, 6.250, 12.500, 25 e 50 GHz, capacidade de transmiss?o das taxas suportadas pela tecnologia WDM e ainda taxas de 200 Gb/s, 400 Gb/s e 1 Tb/s, e podem ser implantadas sobre a mesma infraestrutura ?ptica WDM j? existente correspondendo assim a um custo altamente inferior se comparado a implanta??o de novas redes. A efici?ncia desta nova proposta de tecnologia est? principalmente nos algoritmos de roteamento e atribui??o espectral (Routing and Spectrum Assignment - RSA) que visam a maximiza??o dos recursos de disponibilidade da rede atrav?s da diminui??o da probabilidade de bloqueio. O uso do RSA resulta na gera??o de fragmenta??o diminuindo a disponibilidade de recursos da rede. Dentro deste cen?rio, o presente trabalho estuda a viabilidade do uso de desfragmenta??o baseada na realoca??o sobre o enlace que apresentar maior ?ndice de fragmenta??o e analisa a ado??o de dois ?ndices: ?ndice de consecutividade e ?ndice de maior n?mero de FSUs ocupados, para a sele??o do enlace a ser desfragmentado. Os resultados deste estudo foram obtidos a partir do desenvolvimento da vers?o 5 do simulador Elastic Op tica I Network Simulator (EONSim). Para a obten??o dos resultados, diferentes taxas de transmiss?o foram distribu?das uniformemente para cada uma carga de tr?fego entre 45 e 100 erlang (E), o RSA First-Fit (FF) foi adotado para todas as simula??es, para diminuir o processamento as desfragmenta??es foram executadas a partir de um n?mero R de conex?es liberadas (R= 10, R= 50 e R= 100). Para o cen?rio utilizando o ?ndice de consecutividade, foi aferido ganho de at? 44 para 55 E e ganho m?dio de 15 quando comparado aos resultados do cen?rio sem desfragmenta??o, para o uso do ?ndice de maior n?mero de FSUs ocupados, foi observado ganho de 26 para 55 E com ganho m?dio de 10. A partir dos resultados obtidos ? poss?vel concluir que a ado??o de estrat?gias de desfragmenta??o para redes EONs s?o pass?veis de serem utilizadas pois apresentam diminui??o da probabilidade de bloqueio e aumento da disponibilidade dos recursos da rede

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