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Wide-Sense Nonblocking W-S-W Node Architectures for Elastic Optical Networks
Wojciech KABACIŃSKI Mustafa ABDULSAHIB Marek MICHALSKI
IEICE TRANSACTIONS on Communications
Publication Date: 2019/05/01
Online ISSN: 1745-1345
Type of Manuscript: Special Section PAPER (Special Section on European ICT R&D Project Activities on Broadband Access Technologies in Conjunction with Main Topics of 2016/2017 IEICE ICT Forum)
elastic optical networks, photonic switching systems, optical switching fabrics, nonblocking conditions,
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This paper considers wide-sense nonblocking operation of the Wavelength-Space-Wavelength elastic optical switch. Six control algorithms, based on functional spectrum decomposition in interstage links and functional decomposition of center stage switches, are proposed for two switching fabric architectures. For these algorithms we derived wide-sense nonblocking conditions and compared them with strict-sense nonblocking ones. The results show that the proposed algorithm reduces the required number of frequency slot units (FSUs) or center stage switches, depending on the switching fabric architecture. Savings occur even when connections use small number of frequency slot units.