Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/16167
Título: | Optimizing network load balancing : an hybridization approach of metaheuristics with column generation |
Autor(es): | Santos, Dorabella Sousa, Amaro Alvelos, Filipe Pereira e Pióro, Michal |
Palavras-chave: | Link load balancing optimization Column generation based heuristics Routing Traffic engineering |
Data: | 2013 |
Editora: | Springer |
Revista: | Telecommunication Systems |
Resumo(s): | Given a capacitated telecommunications network with single path routing and an estimated traffic demand matrix, we aim to determine the routing path of each traffic commodity such that the whole set of paths provide an optimal network load balancing. In a recent paper, we have proposed a column generation based heuristic where, in the first step, we use column generation to solve a linear programming relaxation of the original problem (obtaining, in this way, a lower bound and a set of paths for each commodity) and, in the second step, we apply a multi-start local search with path relinking heuristic on the solution space defined by the paths of the first step. Here, we propose a hybridization approach of the metaheuristic with column generation that can be seen as an enhanced version of the previous approach: we run column generation not only at the beginning (to define the initial search space) but also during the search. These additional column generation steps consist in solving a perturbed problem defined by the incumbent solution. In the previous paper, we have shown that the first approach is efficient in obtaining near optimal routing solutions within short running times. With the enhanced version, we show through computational results that the additional paths, introduced by the additional column generation steps, either improve the efficiency of the algorithm or show similar efficiency in the cases where the original algorithm is already very efficient. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/16167 |
DOI: | 10.1007/s11235-011-9604-3 |
ISSN: | 1018-4864 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | LES/ALG - Artigos em revistas científicas internacionais com arbitragem |
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Optimizing network load balancing_ an hybridization approach of metaheuristics with column generation.pdf Acesso restrito! | 519,41 kB | Adobe PDF | Ver/Abrir |