DocumentCode :
579310
Title :
Survivable traffic grooming in elastic optical networks — Shared path protection
Author :
Liu, Menglin ; Tornatore, Massimo ; Mukherjee, Biswanath
Author_Institution :
Dept. of Comput. Sci., Univ. of California, Davis, Davis, CA, USA
fYear :
2012
fDate :
10-15 June 2012
Firstpage :
6230
Lastpage :
6234
Abstract :
This study investigates the survivable traffic grooming problem for elastic optical networks with flexible grid employing new transmission technologies, e.g., orthogonal frequency-division multiplexing (OFDM). In such networks, the strict ITU-T wavelength grid is not followed. Instead, optical transponders are developed to be capable of properly tuning their rates. Equipping the network with gridless and elastic optical paths allows us to efficiently use the optical spectrum. In this paper, we propose a novel elastic shared path protection (ESPP), which does not only provide the traditional backup sharing of shared path protection (SPP) (i.e., the backup capacity of one optical path (i.e., lightpath) can be shared among multiple backup paths, provided that their corresponding working paths are link-disjoint), but also explores a new opportunity of sharing enabled by the tunability of the transponders: in fact, the backup spectrum can be shared between two adjacent lightpaths on a link, if their corresponding working paths are link-disjoint. The elasticity of the transponder enables the expansion and contraction of the lightpaths, so that at one time, the backup spectrum is used by only one of the adjacent lightpaths. Note that in traditional wavelength-division-multiplexing (WDM) networks, the lightpaths are fixed-grid, rigid-bandwidth, nor can they overlap each other. Our results show that ESPP is more spectrum efficient than traditional SPP.
Keywords :
OFDM modulation; optical fibre networks; telecommunication traffic; transponders; wavelength division multiplexing; ESPP; ITU-T wavelength grid; adjacent lightpaths; backup spectrum; elastic optical networks; elastic shared path protection; optical transponders; orthogonal frequency division multiplexing; survivable traffic grooming; wavelength division multiplexing networks; Bandwidth; Elasticity; Optical fiber networks; Optical signal processing; Transponders; WDM networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (ICC), 2012 IEEE International Conference on
Conference_Location :
Ottawa, ON
ISSN :
1550-3607
Print_ISBN :
978-1-4577-2052-9
Electronic_ISBN :
1550-3607
Type :
conf
DOI :
10.1109/ICC.2012.6364983
Filename :
6364983
Link To Document :
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