@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 = "03 maio 2024"
}