Open AccessHighly spectral efficient networks based on grouped optical path routing
Author(s) -
Yuki Terada,
Yojiro Mori,
Hiroshi Hasegawa,
Ken-ichi Sato
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.006213
Subject(s) - computer science , optical path , routing (electronic design automation) , optical add drop multiplexer , wavelength division multiplexing , optical transport network , computer network , frequency allocation , optical cross connect , node (physics) , optics , electronic engineering , optical performance monitoring , optical fiber , telecommunications , physics , engineering , acoustics , wavelength
In order to mitigate the signal spectrum narrowing caused by optical filtering at nodes, an adequate guard band is needed between optical channels, which degrades the frequency utilization of optical fibers. In this study, we propose a grouped routing based network architecture that minimizes spectrum narrowing while greatly improving spectral efficiency. Coarse granular routing at GRE (grouped routing entity) level is employed at each ROADM node, but fine granular add/drop is adopted to retain high frequency utilization. Optical channels are packed densely in each GRE, and sufficient guard bands are inserted between GREs. As a result, signal spectrum narrowing is minimized and efficient spectrum utilization is achieved. Network design/control algorithms that support both static and dynamic traffic growth are developed. Extensive simulations demonstrate the effectiveness of the proposed architecture. To implement the scheme, current LCOS-based ROADMs are applied without any hardware changes; only the control schema are modified.