Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4756
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Title: Wavelength-routed networks with lightpath data interchanges
Authors: Li, CY
Cai, L
Wai, PKA 
Li, OKV
Xu, A
Issue Date: 1-Jul-2010
Source: Journal of optical communications and networking, 1 July 2010, v. 2, no. 7, p. 415-426
Abstract: We observe that tunable wavelength converters (TWCs) that are traditionally installed in wavelength-routed (WR) networks for wavelength contention resolution can be further utilized to provide fast data switching between lightpaths. This allows us to route a data unit through a sequence of lightpaths from source to destination if a direct single lightpath connection is not available or if we want to minimize the overhead of setting up new lightpaths. Since TWCs have a tuning time of picoseconds, it may be possible to use the installed TWCs as lightpath data interchanges (LPIs) to improve the performance of WR networks without significant optical hardware upgrade. Compared with the multihop electronic grooming approach of lightpath networks, the LPI approach has a simpler WR node architecture, does not need expensive high-speed electrical multiplexers/routers, and does not sacrifice the bit-rate/format transparency of data between the source and destination. Our simulation results show that WR networks with LPIs can have much lower blocking probability than WR networks without LPIs if the traffic duration is short. We show that LPIs can also be used to provide new data transportation services such as optical time division multiplexing access (OTDMA) time-slotted service in WR networks.
Keywords: Wavelength-routed networks
Tunable wavelength converters
Wavelength division multiplexing
Optical time division multiplexing
Publisher: Optical Society of America
Journal: Journal of optical communications and networking 
ISSN: 1943-0620 (print)
1943-0639 (online)
DOI: 10.1364/JOCN.2.000415
Rights: © 2010 Optical Society of America. This paper was published in Journal of Optical Communications and Networking and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/jocn/abstract.cfm?uri=jocn-2-7-415. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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