An Experiment of GMPLS-Based Dispersion Compensation Control over In-Field Fibers

Shoichiro SENO  Eiichi HORIUCHI  Sota YOSHIDA  Takashi SUGIHARA  Kiyoshi ONOHARA  Misato KAMEI  Yoshimasa BABA  Kazuo KUBO  Takashi MIZUOCHI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E95-B   No.6   pp.1997-2004
Publication Date: 2012/06/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
optical fiber dispersion,  optical fiber measurement,  dispersion compensation,  restoration,  GMPLS,  WSON,  

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Summary: 
As ROADMs (Reconfigurable Optical Add/Drop Multiplexers) are becoming widely used in metro/core networks, distributed control of wavelength paths by extended GMPLS (Generalized MultiProtocol Label Switching) protocols has attracted much attention. For the automatic establishment of an arbitrary wavelength path satisfying dynamic traffic demands over a ROADM or WXC (Wavelength Cross Connect)-based network, precise determination of chromatic dispersion over the path and optimized assignment of dispersion compensation capabilities at related nodes are essential. This paper reports an experiment over in-field fibers where GMPLS-based control was applied for the automatic discovery of chromatic dispersion, path computation, and wavelength path establishment with dynamic adjustment of variable dispersion compensation. The GMPLS-based control scheme, which the authors called GMPLS-Plus, extended GMPLS's distributed control architecture with attributes for automatic discovery, advertisement, and signaling of chromatic dispersion. In this experiment, wavelength paths with distances of 24 km and 360 km were successfully established and error-free data transmission was verified. The experiment also confirmed path restoration with dynamic compensation adjustment upon fiber failure.