Topic
Optical Transport Network
About: Optical Transport Network is a research topic. Over the lifetime, 6055 publications have been published within this topic receiving 85783 citations.
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05 Mar 2006
TL;DR: Simulation results show that the algorithm proposed in this paper is always better than the bounds of two link-disjoint paths protection scheme.
Abstract: This paper investigates the maximum survivability problem in mesh networks with multiple failures. A heuristic algorithm is proposed to maximize the end-to-end survivability. Simulation results show that the algorithm proposed in this paper is always better than the bounds of two link-disjoint paths protection scheme.
23 citations
12 Nov 2013
TL;DR: In this paper, application-specific virtual optical networks (VONs) are provisioned as infrastructure services, and VON composition methods over the Mixed-Line-Rate optical WDM network are introduced, taking into account the optical layer constraints.
Abstract: Optical network virtualization enables the provisioning of application-specific virtual optical networks (VONs) as infrastructure services. VON composition methods over the Mixed-Line-Rate optical WDM network are introduced, taking into account the optical layer constraints.
23 citations
TL;DR: The motivations and architecture for optical-based network virtualization are overviewed, it is argued that spectrum-sliced elastic optical path networks can be considered as a promising substrate choice, and the NP-completeness of the OVNE-SLICE problem is proved.
Abstract: The recent decade has witnessed an evolution toward virtualization of everything for the IT industry. Resources, from utility resources to networking components and functions, are abstracted as logical or virtual services. Virtualization results in elastic, agile, and automated resource provision, and facilitates the resource pricing in a pay-as-you-go model. Among this wave, the optical community has made parallel efforts in virtualizing resources in optical networks including both optical node and link resources. A virtualized optical network can not only seamlessly support automated resource provision, but also supply high-bandwidth any-to-any connectivity for network virtualization. In this paper, we overview the motivations and architecture for optical-based network virtualization. Among candidate optical networking paradigms, we argue that spectrum-sliced elastic optical path (SLICE) networks can be considered as a promising substrate choice, and study the key enabling problem, namely optical virtual network embedding over SLICE networks (OVNE-SLICE). We prove the NP-completeness of the OVNE-SLICE problem, and propose two mathematical models for this problem based on a concept named path-channel . The models are evaluated in our simulation, and compared with alternative models proposed in the literature.
23 citations
17 Mar 2002
TL;DR: The spectral efficiency, which can be defined as the ratio of the bit rate per channel to the inter-channel spacing, determines the capacity that can be packed into a single fiber in a WDM.
Abstract: The usable capacity in the fiber is limited by the operating windows in the different bands. Within these constraints, the cost of the WDM line at high capacities is directly dependent on the spectral efficiency, which can be defined as the ratio of the bit rate per channel to the inter-channel spacing. The higher the spectral efficiency is, the higher is the capacity that can be packed into a single fiber.
23 citations
Patent•
02 Feb 2004TL;DR: In this paper, the authors propose an optical network (1001) configuration, which includes a plurality of optical edge routers (1003) having optical path establishing means (1316) and connecting an external IP network (1002) to the optical network.
Abstract: An optical network (1001) includes: a plurality of optical edge routers (1003) having optical path establishing means (1316) and connecting an external IP network (1002) to the optical network (1001); and a plurality of optical cross connect devices having switching means on optical path basis for connecting the edge routers (1003) to one another by an optical path. The optical edge routers (1003) include both of (1) an optical network control instance INSp having topology information in the optical network (1001) and performing optical path routing and signaling and (2) an IP network instance INSi having an external IP network routing table and operating a routing protocol between the edge routers and the external IP network. With this configuration, it is possible to realize a multi-layer linkage function and provide an optical network having a high stability.
23 citations