Browsing by Subject "Optical networks"
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Item Open Access Optical core networks research in the e-Photon-ONe+ project(2009) Callegati F.; Cugini F.; Ghobril P.; Gunreben, S.; López V.; Martini, B.; Pavón-Mariño P.; Perényi, M.; Sengezer, N.; Staessens, D.; Szigeti J.; Tornatore, M.This paper reports a summary of the joint research activities on Optical Core Networks within the e-Photon-ONe+ project. It provides a reasonable overview of the topics considered of interest by the European research community and supports the idea of building joint research activities that can leverage on the expertise of different research groups. © 2009 IEEE.Item Open Access Toward an optimal foundation architecture for optoelectronic computing. Part II: Physical construction and application platforms(Optical Society of America, 1997-08-10) Özaktaş, Haldun M.Various issues pertaining to the physical construction of systems that are based on regularly interconnected device planes, such as heat removal and extensibility of the optical interconnections for larger systems, are discussed. Regularly interconnected device planes constitute a foundation architecture that is reasonably close to the best possible as defined by physical limitations. Three application platforms based on the foundation architecture described are offered.Item Open Access TSCP: a tabu search algorithm for wavelength converting node placement in WDM optical networks(IEEE, 2005) Şengezer, Namık; Karasan, EzhanSparse wavelength conversion can increase the performance of all-optical wavelength division multiplexing (WDM) networks signi cantly by relaxing the wavelength continuity constraint. In this paper, we study the wavelength converter placement problem in multi- ber networks with static traf c demands. We present a tabu search based heuristic algorithm. The objective of the algorithm is to satisfy all the traf c demands with the minimum total cost of bers achieved in the full conversion case, by placing minimum number of wavelength converting nodes. We also implement a greedy algorithm and compare the performances of these converter placement algorithms with the optimum solutions on a sample network. The Tabu search based algorithm achieves the optimum solution in 72% of the test cases and it increases the average number of wavelength converting nodes by less than 10% with respect to the optimum solution. The effect of the utilized routing scheme on the generated solutions and the correlation between the converter node locations and the amount of traf c passing through the nodes are also investigated.