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Optical Engineering

Protection schemes with waveband grooming in fault-tolerant multidomain optical networks
Author(s): Lei Guo; Jiannong Cao; Xingwei Wang; Dingde Jiang; Ting Yang
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Paper Abstract

In wavelength-division-multiplexing networks, the fault-tolerance is very important since failures may lead to a significant amount of data loss. At the same time, the waveband switching technique is very interesting since it can save switching ports in optical cross-connections. In addition, the hierarchical routing in multidomain optical networks is very challenging since the interdomain routing is based on aggregative virtual topology. However, previous works did not jointly consider the three issues. We propose two schemes, segment-based protection (SBP) and path-based protection (PBP), to provide the fault-tolerance and waveband grooming in multidomain optical networks. In SBP, for each connection we first compute an interdomain loose route based on virtual topology, and then we compute the intradomain exact path-pairs in each single domain traversed by the loose route based on physical topology. In PBP, for each connection we first compute an interdomain loose primary path and an interdomain loose backup path based on virtual topology, and then we compute the intradomain exact paths in each single domain traversed by the loose primary path and backup path based on the physical topology. To support multidomain waveband grooming, we present the layered auxiliary graph. Simulation results show that PBP performs better than SBP.

Paper Details

Date Published: 1 April 2010
PDF: 9 pages
Opt. Eng. 49(4) 045002 doi: 10.1117/1.3381182
Published in: Optical Engineering Volume 49, Issue 4
Show Author Affiliations
Lei Guo, Northeastern Univ. (China)
Jiannong Cao, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Xingwei Wang, Northeastern Univ. (China)
Dingde Jiang, Northeastern Univ. (China)
Ting Yang, Northeastern Univ. (China)


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