research unit 1

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Type of publication:Inproceedings
Entered by:
TitleOnline RWA Based on Impairment Generating Sources
Bibtex cite IDRACTI-RU1-2009-118
Booktitle 28th IEEE conference on Global telecommunications
Year published 2009
Location USA
We propose and evaluate an impairment-aware multi-parametric routing and wavelength assignment algorithm for online traffic in transparent optical networks. In such networks the signal quality of transmission degrades due to physical layer impairments. In the multiparametric approach, a vector of cost parameters is assigned to each link, from which the cost vectors of candidate lightpaths are calculated. In the proposed scheme the cost vector includes impairment generating source parameters, such as the path length, the number of hops, the number of crosstalk sources and other inter-lightpath interfering parameters, so as to indirectly account for the physical layer effects. For a requested connection the algorithm calculates a set of candidate lightpaths, whose quality of transmission is validated using a function that combines the impairment generating parameters. For selecting the lightpath we propose and evaluate various optimization functions that correspond to different IA-RWA algorithms. Our performance results indicate that the proposed algorithms utilize efficiently the available resources and minimize the total accumulated signal degradation on the selected lightpaths, while having low execution times.
Kokkinos, Panagiotis
Christodoulopoulos, Konstantinos
Manousakis, Kostas
Varvarigos, Emmanouel
Publication ID803