Hierarchical routing and traffic grooming in IP/MPLS-based ASON/GMPLS multi-domain networks |
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Authors: | Wajdi Halabi Kris Steenhaut Marnix Goossens Thu-Huong Truong Ann Nowé |
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Affiliation: | (1) Department of Electrical and Computer Engineering, University of New Mexico, Albuquerque, NM 87131, USA;(2) Wuhan University, Wuhan, People’s Republic of China;(3) Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134, USA |
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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. |
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