Path protection WDM networks with impaired-transmission |
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Authors: | Sávio R A dos Santos Rosa André C Drummond Nelson L S da Fonseca |
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Affiliation: | 1.Institute of Computing,University of Campinas,Campinas,Brazil |
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Abstract: | In wavelength division multiplexing (WDM) networks, failures may imply severe loss of data due to the high transmission rates,
leading to the need for employment of protective mechanisms. Transparency and switching in all-optical networks cause physical
impairment, which can significantly degrade signal quality. If the signal quality along a path is below acceptable values,
this path cannot be used for incoming requests in the establishment of lightpaths. Therefore, quality must be checked by the
routing and wavelength assignment algorithm. The present article introduces two novel algorithms for shared path protection
in WDM networks that take into consideration the Polarization Mode Dispersion, Amplifier Spontaneous Emission, and homowavelength
cross-talk physical impairments during path selection. The efficiency of these algorithms is compared to that of their impairment-unaware
counterparts. |
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Keywords: | |
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