Document Type

Conference Proceeding

Publisher

IEEE

Faculty

Computing, Health and Science

School

School of Engineering and Mathematics, Centre for Communications Engineering Research

RAS ID

3556

Comments

This conference paper was originally published as: Phung, Q.V. , Habibi, D. , Nguyen, H. N., & Lo, K. (2005). K Pair of disjoint paths Algorithm for Protection in WDM Optical Networks. Proceedings of Asia Pacific Conference on Communications. (pp. 183-187). Perth. IEEE. Original article available here

© 2005 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Abstract

Survivable routing in wavelength division multiplexing (WDM) optical networks has been proven to be NP-hard problem. There is a trade-off between the computational time and the optimality of solutions in existing approaches to the problem. Existing heuristic approaches purely based the graph algorithms are efficient in computational time but do not offer optimal solutions and may fail in some cases even when a solution exists. Meanwhile, the integer linear programming (ILP) models offer optimal solutions but are intractable even with moderate scale networks. In this paper, we introduce a new algorithm for finding K pairs of disjoint paths which are employed as K candidate pairs for each connection in the ILP models. We introduce an ILP model for dedicated path protection in which the number of decision variables is mainly dependant on traffic requests and the constant K, not on the network size

DOI

10.1109/APCC.2005.1554044

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free_to_read

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Link to publisher version (DOI)

10.1109/APCC.2005.1554044