Hierarchical routing and traffic grooming in IP/MPLS-based ASON/GMPLS multi-domain networks

Authors:
Wajdi Halabi;Kris Steenhaut;Marnix Goossens;Thu-Huong Truong;Ann Nowé
Affiliations:
ETRO Department, Vrije Universiteit Brussel (VUB), Brussels, Belgium 1050;ETRO Department, Vrije Universiteit Brussel (VUB), Brussels, Belgium 1050 and IWT Department, Erasmus Hogeschool Brussel (EHB), Brussels, Belgium 1070;ETRO Department, Vrije Universiteit Brussel (VUB), Brussels, Belgium 1050;Department of Communication Systems, Hanoi University of Science and Technology, Hanoi, Vietnam;ETRO Department, Vrije Universiteit Brussel (VUB), Brussels, Belgium 1050 and COMO Lab, Vrije Universiteit Brussel (VUB), Brussels, Belgium 1050
Venue:
Photonic Network Communications
Year:
2012

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Abstract

Routing, connection setup, and path computation are well-known problems in multi-domain networks, which have been largely analyzed in pure IP (packet) networks. In circuit-switched optical multi-domain networks, there remain, however, a number of routing and path computation challenges. Traffic grooming means combining a number of low-speed traffic streams so that the high capacity of each lightpath may be used as efficiently as possible, as path computation implements the core of the grooming function, it is obvious that solutions for the traffic grooming problem in optical multi-domain networks are still not sufficiently investigated. In this study we propose a methodology to address the problems of routing, connection setup, and traffic grooming in optical multi-domain networks, which adapts a two-level hierarchical routing scheme and full-mesh topology abstraction algorithm to improve routing scalability and lower inter-domain blocking probabilities; additionally our proposed methodology adapts a scheme for traffic grooming in DWDM multi-domain networks to improve the resources usage. To test our proposed methodology we propose a detailed IP/MPLS-based ASON/GMPLS multi-domain multilayer test framework.