Distributed approaches for impairment-aware routing and wavelength assignment algorithms in GMPLS networks

Authors:
Gustavo Sousa Pavani;Luiz Gustavo Zuliani;Helio Waldman;Mauricio Magalhães
Affiliations:
School of Electrical and Computer Engineering, State University of Campinas (Unicamp), Rua Albert Einstein, 400. CP 6101, CEP: 13083-852 Campinas-SP, Brazil;School of Electrical and Computer Engineering, State University of Campinas (Unicamp), Rua Albert Einstein, 400. CP 6101, CEP: 13083-852 Campinas-SP, Brazil;Federal University of ABC (UFABC), Rua Catequese, 242, CEP: 09090-400 Santo André-SP, Brazil;School of Electrical and Computer Engineering, State University of Campinas (Unicamp), Rua Albert Einstein, 400. CP 6101, CEP: 13083-852 Campinas-SP, Brazil
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking
Year:
2008

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Abstract

This work proposes two different distributed strategies for provisioning lightpaths in the presence of optical physical-layer impairments in GMPLS networks. The first approach is a more classical one, which introduces new extensions to the OSPF-TE routing protocol. The other approach makes use of an Ant Colony Optimization (ACO) algorithm to adaptively calculate routes in the network by actively monitoring the aggregate optical power of each link. By using an analytical model to incorporate the constraints of the Amplified Spontaneous Emission (ASE) noise of the optical amplifiers into the routing, we demonstrate the effectiveness of our approaches by means of an illustrative numerical example.