NECO: Cross-Layer Survivability in WDM-based Networks

现代通信网络采用分层方式构建，在光纤网络之上建立一个或多个电子层（如IP、ATM、SONET）。使用如此多的层是为了简化网络设计和操作，并实现网络资源的有效共享。然而，这种分层也会导致某些效率低下和互操作性问题。该项目探讨了分层对网络生存能力的影响，并开发了对层间故障传播具有弹性的网络架构。尽管它的重要性和实用性，但迄今为止，在理解这种复杂的分层环境中的网络生存能力方面所做的工作很少。这个项目的目标是发展一个理解跨层生存能力的基本理论；以及通过在不同层的网络拓扑的联合设计来提供分层网络生存能力的机制。这项研究的成果将包括：(i)开发用于评估分层网络架构的生存性属性的新指标；（ii）通过逻辑和物理拓扑的联合设计开发增强跨层生存性的机制。（ii）开发具有良好跨层连接特性的新网络架构。这项研究的结果将通过在会议、期刊和网络上的出版物广泛传播。这项研究将直接影响未来网络的设计和部署方式；特别是，这将导致网络设计具有鲁棒性，并且不受故障跨层传播的影响

Modern communication networks are constructed using a layered approach, with one or more electronic layers (e.g., IP, ATM, SONET) built on top of an optical fiber network. This multitude of layers is used in order to simplify network design and operations and to enable efficient sharing of network resources. However, this layering also gives rise to certain inefficiencies and interoperability issues. This project explores the impact of layering on network survivability and develops network architectures that are resilient to failure propagation between layers. In spite its importance and practicality, to date, very little has been done to understand network survivability in this complex layered environment. The goals of this project is to develop a fundamental theory for understanding cross-layer survivability; and mechanisms for providing survivability in layered networks through the joint design of the network topologies at the different layers. The outcomes of this research will include: (i) the development of new metrics for assessing the survivability properties of layered network architectures (ii) the development of mechanisms for enhancing cross-layer survivability through the joint design of the logical and physical topologies. (ii) the development of new network architectures that have good cross-layer connectivity properties. The results of this research will be widely disseminated through publication in conferences, journals and the web. This research will directly impact the way in which future networks will be designed and deployed; and in particular, will lead to network designs that are robust and immune to failure propagation across layers