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Physical-layer failure-localization potential is explored in finding the survivable mapped lightpaths of IP over transparent optical networks. Numerical results show that accurate or near-accurate failure localizations are achieved with the new survivable mapping design.
Performance of using backup path reprovisioning for non-revertive operations of shared-path-protected optical networks is assessed in terms of connection availability. Numerical results indicate that the approach is attractive when sufficient free wavelengths are available.
Core networks of the future will have a translucent and eventually transparent optical structure. Ultra-high-speed end-to-end connectivity with high quality of service and high reliability will be realized through the exploitation of optimized protocols and lightpath routing algorithms. These algorithms will complement a flexible control and management plane integrated in the proposed solution. Physical...
The successive minimal incremental routing (SMIR) algorithm is proposed to implement the class-aware routing scheme in multi-class optical burst switching (OBS) networks to further reduce the burst loss probability of multiple classes.
We implement extensions to intrinsic functionality of standard RSVP-TE on a commercially available GMPLS protocol stack to setup optically feasible lightpaths and study the performance and deployment feasibility in real-world transparent WDM optical networks.
A framework providing differentiated dual-failure restorability is proposed for single-failure-protected optical networks. Without deteriorating the overall dual-failure restorability, dual-failure restorability of high-class flows can be relatively higher than that of low-class flows by over 30%.
With the increase of the number of wavelengths per fiber, waveband switching has been proposed to decrease the number of switching ports in optical nodes. Another concept, that of Light trails, allows the intermediate nodes along a lightpath to access the wavelength channel, aiming at the reduction of the number of wavelengths. Both techniques apply traffic grooming on different levels of the WDM...
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