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@InProceedings{CandiaCarvRodr:2013:MoMaAl,
               author = "Candia, Marcos Paulo Lobo de and Carvalho, Solon Ven{\^a}ncio de 
                         and Rodrigues, Rita de Cassia Meneses",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Modelo Markoviano para aloca{\c{c}}{\~a}o de espectro em redes 
                         WDM flex{\'{\i}}veis",
            booktitle = "Anais...",
                 year = "2013",
         organization = "Simp{\'o}sio Brasileiro de Pesquisa Operacional, 45. (SBPO).",
             keywords = "redes {\'o}pticas el{\'a}sticas, aloca{\c{c}}{\~a}o de 
                         espectro, processo Markoviano, elastic optical networks, spectrum 
                         allocation, Markov process.",
             abstract = "A fibra {\'o}ptica vem sendo utilizada para atender a crescente 
                         demanda de tr{\'a}fego de dados em redes computacionais. As redes 
                         WDM flex{\'{\i}}veis, recentemente propostas, oferecem 
                         capacidade de aloca{\c{c}}{\~a}o din{\^a}mica de espectro para 
                         acomoda{\c{c}}{\~a}o de diferentes taxas de transmiss{\~a}o. 
                         Nestas redes, o problema fundamental, denominado como Routing and 
                         Spectrum Allocation (RSA), {\'e} rotear e alocar o recurso 
                         espectral para acomodar as requisi{\c{c}}{\~o}es de 
                         conex{\~a}o. O RSA pode ser dividido em dois subproblemas: 
                         roteamento e aloca{\c{c}}{\~a}o de espectro. Na 
                         aloca{\c{c}}{\~a}o de espectro, uma conex{\~a}o {\'e} 
                         atribu{\'{\i}}da a um ou mais slots de espectro, dependendo da 
                         capacidade de transmiss{\~a}o requerida, e, se m{\'u}ltiplos 
                         slots s{\~a}o necess{\'a}rios, eles devem ser 
                         cont{\'{\i}}guos. Neste trabalho, estudase, por meio de um 
                         modelo markoviano, o subproblema de aloca{\c{c}}{\~a}o de 
                         espectro em um link de uma rede WDM flex{\'{\i}}vel. Uma 
                         heur{\'{\i}}stica para acomoda{\c{c}}{\~a}o das conex{\~o}es 
                         que minimize a fragmenta{\c{c}}{\~a}o de espectro {\'e} 
                         proposta e comparada a outras da literatura. ABSTRACT: Optical 
                         fiber has been used to supply the growing demand for data traffic 
                         in computer networks. The flexible WDM networks, recently 
                         proposed, provide capacity for dynamic spectrum allocation to 
                         accommodate different transmissions rates. In these networks, the 
                         fundamental problem, denoted by Routing and Spectrum Allocation 
                         (RSA), is routing and allocating spectrum resource to accommodate 
                         the connection requests. RSA can be divided into two sub problems: 
                         routing and spectrum allocation. In the spectrum allocation, a 
                         connection is assigned to one or more slots of spectrum depending 
                         on the transmission capacity required, and, if multiple slots are 
                         necessary, they must be contiguous. In this paper, we study, 
                         through a Markov model, the spectrum allocation sub problem on a 
                         link in a flexible WDM network. A heuristic for allocation of 
                         connections that minimizes the spectrum fragmentation is also 
                         proposed and compared to others from the literature.",
  conference-location = "Natal, Brasil",
      conference-year = "6 a 19 de setembro de 2013",
             language = "pt",
           targetfile = "115584.pdf",
        urlaccessdate = "24 jan. 2021"
}


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