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Pre-Adjustment Rerouting for Wavelength Defragmentation in Optical Transparent WDM Networks
Akihiro KADOHATA Atsushi WATANABE Akira HIRANO Hiroshi HASEGAWA Ken-ichi SATO
Publication
IEICE TRANSACTIONS on Communications
Vol.E98-B
No.10
pp.2014-2021 Publication Date: 2015/10/01 Online ISSN: 1745-1345
DOI: 10.1587/transcom.E98.B.2014 Type of Manuscript: PAPER Category: Fiber-Optic Transmission for Communications Keyword: optical transparent wdm networks, reconfiguration, defragmentation,
Full Text: PDF(1.7MB)>>
Summary:
We propose a new extension to reconfiguration algorithms used to address wavelength defragmentation to enhance the path accommodation efficiency in optical transparent wavelength division multiplexing networks. The proposed algorithm suppresses the number of fibers employed to search for a reconfigurable wavelength channel by combining routes between the target path and the existing path in a reconfigured wavelength channel. This paper targets three main phases in reconfiguration: i) the reconfiguration trigger; ii) redesign of the wavelength path; and iii) migrating the wavelength paths. The proposed and conventional algorithms are analyzed from the viewpoints of the number of fibers, accommodation rate and the number of migrating sequences. Numerical evaluations show that the number of fibers is suppressed by 9%, and that the accommodation efficiency is increased by approximately 5%-8% compared to when reconfiguration is not performed.
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