Fragmentation-Minimized Periodic Network-Bandwidth Expansion Employing Aligned Channel Slot Allocation in Flexible Grid Optical Networks

Hiroshi HASEGAWA
Takuma YASUDA
Yojiro MORI
Ken-ichi SATO

Publication
IEICE TRANSACTIONS on Communications   Vol.E104-B    No.12    pp.1514-1523
Publication Date: 2021/12/01
Publicized: 2021/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2021EBP3027
Type of Manuscript: PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
semi-flexible grid,  periodic network upgrade,  fragment mitigation,  

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Summary: 
We propose an efficient network upgrade and expansion method that can make the most of the next generation channel resources to accommodate further increases in traffic. Semi-flexible grid configuration and two cost metrics are introduced to establish a regularity in frequency assignment and minimize disturbance in the upgrade process; both reduce the fragmentation in frequency assignment and the number of fibers necessary. Various investigations of different configurations elucidate that the number of fibers necessary is reduced about 10-15% for any combination of upgrade scenario, channel frequency bandwidth, and topology adopted.