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This paper proposes a novel Spectrum Compactness based Defragmentation scheme to maximize the profitability of defragmentation. Numerical simulation shows that there exists an optimum load region to operate defragmentation.
As the survivable mapping is critical in IP-over-wavelength-division-multiplexing (WDM) network to guarantee the restorability of IP layer, provisioning survivability in network with dynamic traffic is essential. However, survivable mapping problem for dynamic traffic shows more complexity than that for static traffic: 1) How to guarantee a survivable mapping since the lightpath is established and...
A unified control plane is necessary to be designed for multi-layer optical networks, especially for IP over WDM networks to improve the performance and efficiency of the entire networks. This paper focuses on the framework of PCE-based unified control plane, and proposes some strategies for different optimization objectives.
The OTN over WDM network is one of the best solutions of the transmission network. How to manage the cross-connects capacity of the OTN node is a key problem in the OTN over WDM network. In this paper, an OTN over WDM numeric model is proposed to solve the OTN LIU placement problem. Based on the numeric model above, three multi-layer traffic grooming algorithms (OC-DKI, OC-DIK and OC-DIKP) are also...
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