Heuristicas para roteamento e alocação de comprimentos de onda para comunicações multidifusão e comunicações com restrições de potencia em redes opticas / Heuristics to routing and wavelength assignment applied to multicast communications and communications with power restrictions in optical networks

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Due to the WDM (Wavelength Division Multiplexing) technology maturity and the growing popularization of multicast applications, such as teleconference, the support to this type of transmission in WDM layer must be exploited. An issue in routing multicast connections, due to the high cost, is the limited number of switches capable of divide the light signal to more than one destination. This limit introduces the allocation problem of these kind of switches in the nodes of network with objective of facilitate the multicast routing. Despite these topologic issues of the network, other particularities of the routing and wavelength assignment problem are the power issues in the physical layer, which take some power restrictions in optical signal. This work presents a heuristic to solve two problems. The problem of Splitter placement, multicast routing and wavelength assignment and the problem of routing and wavelength assignment with power issues in physical layer in optical network. Experiments indicate that the heuristic presents a good tradeoff between quality and time solution

ASSUNTO(S)

otimização combinatoria comunicações oticas heuristic programming programação heuristica combinatorial optimization optical communications

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