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Extending path computation element for lightpath restoration in wavelength-switched optical networks |
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| Authors: | Lianxing Hou Yueming Lu Junhua Wang Yuefeng Ji Yiqiang Hua Key Laboratory of Information Photonics Optical Communications Ministry of Education Beijing University of Posts Telecommunications Beijing China |
| Institution: | Lianxing Hou~*,Yueming Lu,Junhua Wang Yuefeng Ji,, Yiqiang Hua Key Laboratory of Information Photonics , Optical Communications,Ministry of Education,Beijing University of Posts , Telecommunications,Beijing 100876,China |
| Abstract: | Current generalized multi-protocol label switching(GMPLS) standards do not include adequate models for wavelength-switched optical networks(WSON) in recovery mechanisms.In this letter,GMPLS/path computation element(PCE) extensions are applied for the restoration of the lightpaths disrupted by collision or optical impairment.A reserved deflection routing scheme is proposed to achieve fast restoration. It uses the expanded PCE component to compute and assign the backup paths for lightpath recovery. Numerical ... |
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