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Complexity of column generation in network design with path‐based survivability mechanisms
Author(s) -
Orlowski Sebastian,
Pióro Michał
Publication year - 2012
Publication title -
networks
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.977
H-Index - 64
eISSN - 1097-0037
pISSN - 0028-3045
DOI - 10.1002/net.20484
Subject(s) - column generation , survivability , column (typography) , path (computing) , mathematical optimization , node (physics) , network planning and design , flow (mathematics) , computer science , exponential function , mathematics , computer network , mathematical analysis , geometry , structural engineering , frame (networking) , engineering
This survey deals with computational complexity of column generation problems arising in the design of survivable communication networks. Such problems are often modeled as linear programs based on noncompact multicommodity flow network formulations. These formulations involve an exponential number of path‐flow variables, and therefore require column generation to be solved to optimality. We consider several path‐based protection and restoration mechanisms and present results, both known and new, on the complexity of the corresponding column generation (also called pricing) problems. We discuss results for the case of single link or single node failures scenarios, and extend the considerations to multiple link failures. Further, we classify the design problems corresponding to different survivability mechanisms according to the structure of their pricing problem. Eventually, we show that almost all the encountered pricing problems are hard to solve for scenarios admitting multiple failures, while a great deal of them are \documentclass{article} \usepackage{mathrsfs} \usepackage{amsmath, amssymb} \pagestyle{empty} \begin{document} \begin{align*}\mathcal{NP}\end{align*} \end{document} ‐hard already for single failure scenarios. © 2011 Wiley Periodicals, Inc. NETWORKS, 2012