针对大规模灾害的可靠通信网络设计与网络恢复

作为国家重要基础设施的通信网络在面对自然灾害等大规模破坏时展现出脆弱性的一面，而随着网络业务的爆炸式增长和人们对网络的依赖加强，亟需扩展目前的网络可靠性理论来应对灾害对网络的影响。本项目的目标是开发一套完整的具有容灾能力的网络设计理论。该工作将集中研究容灾网络可靠性理论的三个最根本问题：1）灾害建模和相关的网络可靠性评估；2）主动的网络防灾设计和网络保护；3）灾前与灾后的网络应急恢复。许多重要的课题将在这个项目中得到充分探讨：考虑空间故障相关性和时间失效相关性的灾害模型设计；高效的防灾网络可靠性评估；灾害敏感网络设计和网络资源配置方案；基于软件定义网络的故障影响最小化策略；根据灾害警报信息的前期预防措施；针对灾害区域特点的故障定位；紧急和智能的故障缓解措施以及灾后恢复设计。通过对区域故障这一类问题展开更深入的研究，我们期望该项目将扎实地为现代网络理论的发展和未来通信网络的持续成功做出贡献。

People now are increasingly relying on large-scale communication network infrastructures (like optical backbone communication networks) to provide reliable and mission critical communications for disaster rescue, datacenters, government, military, finance, health care, etc. It is notable, however, that such communication network infrastructures themselves are facing more and more potential disaster threats, both natural, like as earthquakes, hurricanes, and man-made, like terrorist attacks. Some recent major network disruptions due to disasters include 2012 Sandy Hurricane, 2011 Japan Tsunami, etc. Despite a lot of research activities on reliable network design, a complete theory for disaster-resilient network design has remained largely unexplored. By now, the lack of such a general theory has significantly hindered the systemic design of future highly disaster-resilient network infrastructures with the aim of promoting a safer life for human beings. The goal of this project is to develop a complete theory for disaster-resilient network design by investigating its three fundamental issues, namely disaster modelling and related network reliability assessment, proactive network design and protection against disaster, and reactive pre/post-disaster restoration. A number of important topics, including the modelling of disasters with the considerations of both spatial failure correlation and temporal failure correlation, cost efficient assessment of network reliability against disaster, disaster-aware network design, disaster-aware resource provisioning, virtual router-based network protection, pre-disaster restoration based on disaster alerts, failure localization under disaster, post-disaster restoration through both immediate relief and intelligent relief techniques, will be fully explored in this project for receiving a wide understanding on the disaster-resilient network design. We envision that this project will solidly contribute to the development of modern Network Theory and to the continuing success of future communication networks.