28 January 2017 Network expansion strategy for elastic optical networks that considers channel capacity upgrades
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Abstract
We propose introducing aligned frequency assignment to each bandwidth channel, i.e., the semi-flexible grid, with the goal of minimizing frequency slot fragmentation under dynamic flexible-grid network expansion considering the expected need for channel capacity upgrades. In semi-flexible grid networks, for each set of channels having the same frequency bandwidth, a regular grid is defined where its spacing is the same as the required bandwidth and channels are aligned to their corresponding grids. A network expansion algorithm is developed that maximizes the efficiency of semiflexible grid assignment to achieve efficient channel bandwidth upgrading. Numerical experiments prove that the number of fibers necessary and the degree of fragmentation in the frequency domain are reduced by 15% and 80%, respectively, compared to conventional flexible grid networks accommodating the same traffic.
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Takuma Yasuda, Takuma Yasuda, Yojiro Mori, Yojiro Mori, Hiroshi Hasegawa, Hiroshi Hasegawa, Ken-ichi Sato, Ken-ichi Sato, } "Network expansion strategy for elastic optical networks that considers channel capacity upgrades", Proc. SPIE 10129, Optical Metro Networks and Short-Haul Systems IX, 1012909 (28 January 2017); doi: 10.1117/12.2250489; https://doi.org/10.1117/12.2250489
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