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Title: Variable neighborhood descent with iterated local search for routing and wavelength assignment.
Authors: Martins, Alexandre Xavier
Duhamel, Christophe
Mahey, Philippe
Saldanha, Rodney Rezende
Souza, Maurício Cardoso de
Keywords: Routing and assignment
Network desing
Variable neighborhood descent
Local search
Issue Date: 2012
Citation: MARTINS, A. X. et al. Variable neighborhood descent with iterated local search for routing and wavelength assignment. Computers & Operations Research, v. 39, n. 9, p. 2133-2141, 2012. Disponível em: <>. Acesso em: 09 out. 2012.
Abstract: In this work we treat the Routing and Wavelength Assignment (RWA) with focus on minimizing the number of wavelengths to route demand requests. Lightpaths are used to carry the traffic optically between origin-destination pairs. The RWA is subjected to wavelength continuity constraints, and a particular wavelength cannot be assigned to two different lightpaths sharing a common physical link. We develop a Variable Neighborhood Descent (VND) with Iterated Local Search (ILS) for the problem. In a VND phase we try to rearrange requests between subgraphs associated to subsets of a partition of the set of lightpath requests. In a feasible solution, lightpaths belonging to a subset can be routed with the same wavelength. Thus, the purpose is to eliminate one subset of the partition. When VND fails, we perform a ILS phase to disturb the requests distribution among the subsets of the partition. An iteration of the algorithm alternates between a VND phase and a ILS phase. We report computational experiments that show VND-ILS was able to improve results upon powerful methods proposed in the literature.
ISSN: 03050548
metadata.dc.rights.license: O Periódico Computers & Operations Research concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3291280451177.
Appears in Collections:DECEA - Artigos publicados em periódicos

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