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Multi-domain traffic engineering is a major focus area for carriers and crankback signaling offers a very promising alternative. However, even though various crankback studies have been done, there remains significant latitude for improved multi-domain designs. To address these challenges, this work develops a novel solution for intra/inter-domain signaling crankback in IP/MPLS networks. Namely, dynamic...
This paper proposes a novel crankback scheme for routing and wavelength assignment across domains. The scheme leverages existing routing state and provides mechanisms to track signaling setup failures and limit overheads and delays.
This paper studies distributed multi-domain, multi-layer provisioning (grooming) in IP/MPLS-DWDM networks. Although many multi-domain studies have emerged over the years, these have primarily considered "homogeneous" network layers. Meanwhile, most grooming studies have assumed idealized settings with "global" link state across all layers. Hence there is a critical need to develop...
Recent studies on inter-domain DWDM networks have focused on topology abstraction for state summarization, i.e. transforming a physical topology to a virtual mesh, tree, or star network. Although these schemes give very good inter- domain blocking reduction, associated inter-domain routing overheads are significant, particularly as the number of domains and border OXC nodes increase. To address these...
This paper addresses the important area of inter-domain routing and lightpath provisioning in DWDM networks with opto-electronic conversion. Unlike previous work, the more challenging case of full wavelength conversion is considered which requires the handling of converter state. To address this challenge a novel full-mesh abstraction scheme is devised to summarize both wavelength and converter state...
This paper investigates the important area of lightpath provisioning in multi-domain full wavelength conversion 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. To address these concerns, a detailed GMPLS-based hierarchical OSPF-TE routing framework is developed...
As DWDM networks proliferate there is a growing need to address the issue of distributed interdomain lightpath provisioning. Although inter-domain provisioning has been well-studied for packet/cellswitching networks, the wavelength dimension presents many additional challenges. This paper develops a novel hierarchical GMPLS-based framework for provisioning all-optical and opto-electronic multi-domain...
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