Virtual-topology adaptation with minimal lightpath change for dynamic traffic in WDM mesh networks

Gencata, A.; Sahasrabuddhe, L.; Mukherjee, B.

doi:10.1109/ofc.2002.1036715

Cited by 6 publications

References 5 publications

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Wavelength retuning without service interruption in an all‐optical survivable network

Hu¹,

Jin

et al. 2009

Int J Communication

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SUMMARYThis paper proposes a new wavelength retuning (WRT) scheme in an all-optical WDM network. Compared with the existing WRT schemes developed for all-optical networks, which can alleviate the wavelengthcontinuity constraint but cannot avoid service interruption or data loss, the proposed scheme is able to alleviate the wavelength-continuity constraint and reduce the connection blocking probability with no service interruption to the on-going traffic. This is achieved by allocating two routes, one for active path and one for backup path, to each incoming connection request and conducting WRT only on the backup path. The backup path provides an alternate path in case of a failure, while the active path carries traffic under normal conditions. Thus, WRT on the backup path will not cause any impact on data transmission. An optimal backup path WRT scheme and a heuristic algorithm are developed and the performance evaluation on the proposed schemes is presented. The simulation results show that the proposed optimal scheme reduces the connection blocking probability by 46.8% on average, while the proposed heuristic scheme reduces the blocking probability by 28.3% on average, all compared with the scheme without WRT.

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