Traffic engineering and regenerator placement in GMPLS networks with restoration

Emre Yetginer; Ezhan Karasan

doi:10.1117/12.475266

8 July 2002 Traffic engineering and regenerator placement in GMPLS networks with restoration

Emre Yetginer, Ezhan Karasan

Proceedings Volume 4868, Scalability and Traffic Control in IP Networks II; (2002) https://doi.org/10.1117/12.475266
Event: ITCom 2002: The Convergence of Information Technologies and Communications, 2002, Boston, MA, United States

Abstract

In this paper we study regenerator placement and traffic engineering of restorable paths in Generalized Multipro-tocol Label Switching (GMPLS) networks. Regenerators are necessary in optical networks due to transmission impairments. We study a network architecture where there are regenerators at selected nodes and we propose two heuristic algorithms for the regenerator placement problem. Performances of these algorithms in terms of required number of regenerators and computational complexity are evaluated. In this network architecture with sparse regeneration, offline computation of working and restoration paths is studied with bandwidth reservation and path rerouting as the restoration scheme. We study two approaches for selecting working and restoration paths from a set of candidate paths and formulate each method as an Integer Linear Programming (ILP) prob-lem. Traffic uncertainty model is developed in order to compare these methods based on their robustness with respect to changing traffic patterns. Traffic engineering methods are compared based on number of additional demands due to traffic uncertainty that can be carried. Regenerator placement algorithms are also evaluated from a traffic engineering point of view.

Citation Download Citation

Emre Yetginer and Ezhan Karasan "Traffic engineering and regenerator placement in GMPLS networks with restoration", Proc. SPIE 4868, Scalability and Traffic Control in IP Networks II, (8 July 2002); https://doi.org/10.1117/12.475266

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