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Optical Packet Switching Networks With Binary Multiwavelength Labels

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6 Author(s)
Seddighian, P. ; Dept. of Electr. & Comput. Eng., Univ. Laval, Quebec City, QC ; Ayotte, S. ; Rosas-Fernandez, J.B. ; LaRochelle, S.
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We propose a network structure for routing optical packets based on binary multiwavelength labels. We resolve the main drawbacks of previously proposed optical label switching scenarios: high splitting loss and complex, expensive hardware. In our scheme, the label is mapped bit-by-bit to a selection of wavelength bins. Variable-length packets are self-forwarded via a multistage switch. This structure is scalable, high-speed, simple, practical, and low-cost, exploiting the workhorses of today's optical communications systems: arrayed waveguide gratings, distributed feedback lasers, LiNbO3 switches, and low-speed photodiodes and electronics (~ 100 MHz). We also propose a solution to alleviate the sophisticated label swapping processing required in generalized multiprotocol label switching (GMPLS) networks. We time-multiplex the binary multiwavelength labels for the entire optical label switching path. We examine the performance of both schemes experimentally by verifying successful routing and error-free transmission.

Published in:

Lightwave Technology, Journal of  (Volume:27 ,  Issue: 13 )

Date of Publication:

July1, 2009

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