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首页> 外文会议>Conference on Optical Transmission Systems and Equipment for WDM Networking, Jul 29-31, 2002, Boston, USA >Optical Network Survivability Beyond the Core
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Optical Network Survivability Beyond the Core

机译：超越核心的光网络生存能力

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Optical network survivability in the backbone, or core, network has been an active area of research. As optics move closer to the edge and to end users, the core network is now used not only to provide connections across a wide area, but also to provide connections for local and metropolitan area networks (LANs and MANs). While optical backbone networks are generally concerned with providing end-to-end circuits based upon whole wavelengths, optical LANS and MANs generally provide shared access to a small number of wavelengths. In this paper, we consider the issue of robustness for optical access networks built as overlays on optical mesh networks. The problem of optical access network robustness is that of maintaining connectivity among nodes of the access networks after a link (or possibly node). We survey three methods of providing robustness to optical access networks. The first method consists of building access networks as covers of rings. The second method builds folded bus overlays and use a combination of optical switches and electronic routers to provide reliability. The third generalizes the concept of buses to build tree-based robust collection and distribution routes over mesh networks. Optical access networks are beginning to be deployed at the edge of the optical backbone network to support access by the high-end users that drive increased bandwidth demands. This development in the applications of optical networking poses new challenges in the areas of medium access, topology design and network management. In this article, we survey access network architectures and outline the issues associated with providing reliability for these architectures.
机译：骨干网或核心网中的光网络生存能力一直是研究的活跃领域。随着光学器件越来越靠近边缘和最终用户，现在不仅使用核心网络提供广泛区域的连接，而且还为局域网和城域网（LAN和MAN）提供连接。尽管光骨干网通常会考虑提供基于整个波长的端到端电路，但是光LAN和MAN通常会提供对少量波长的共享访问。在本文中，我们考虑了构建为光网状网络覆盖层的光接入网络的鲁棒性问题。光接入网络健壮性的问题是在链路（或可能的节点）之后保持接入网络的节点之间的连接性。我们调查了为光接入网络提供鲁棒性的三种方法。第一种方法包括建立作为环网覆盖的接入网。第二种方法建立折叠的总线覆盖层，并结合使用光开关和电子路由器来提供可靠性。第三部分概括了总线的概念，以在网状网络上构建基于树的健壮的收集和分配路由。光接入网已开始部署在光骨干网的边缘，以支持驱动带宽需求增加的高端用户的接入。光网络应用的发展在介质访问，拓扑设计和网络管理领域提出了新的挑战。在本文中，我们调查了接入网络架构，并概述了与为这些架构提供可靠性相关的问题。

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