Abstract
This paper studies routing scalability in multi-domain DWDM networks. Although inter-domain provisioning has been well studied for packet/cell-switching networks, the wavelength dimension (along with wavelength conversion) poses many challenges in multi-domain DWDM settings. To address these concerns a detailed GMPLS-based hierarchical routing framework is proposed for multi-domain DWDM networks with wavelength conversion. This solution uses mesh topology abstraction schemes to hide domain-internal state. However related inter-domain routing loads can be significant here, growing by the square of the number of border nodes. To address these scalability limitations, improved inter-domain routing update strategies are also proposed and the associated performance of inter-domain lightpath RWA and signaling schemes studied.
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Liu, Q., Xie, C., Frangieh, T. et al. Routing scalability in multi-domain DWDM networks. Photon Netw Commun 17, 63–74 (2009). https://doi.org/10.1007/s11107-008-0143-0
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DOI: https://doi.org/10.1007/s11107-008-0143-0