应对大规模灾难损毁的光网络临灾保护与恢复机制研究

In recent years, large-scale disasters (earthquake, hurricane, flood, weapons of mass destruction, etc.) posed critical threats to optical network survivability which attracted wide attention from both industry and academia. The existing researches on surviving disaster failures were usually based on empirical models, which were hard to accurately describe the complex and changeful disaster destruction processes and were apt to cause problems such as unclear surviving targets, weak surviving reliability, and low resource utilization. Accordingly, this project, on the background of earthquake disaster, studies the disaster early warning based network destruction model and the surviving plan decision model by employing the earthquake early warning mechanism. On this basis, aiming at the severe network resource damage caused by the disaster and the large amount of traffic sharply increased in post disaster, this project proposes and researches various network status adapted urgent protection and restoration mechanisms, and corresponding resource optimization mechanisms. By exploiting periodic disaster early warning, as well as grading and quantifying resource usability, we overcome the obstacles in terms of network performance evaluation and resource utilization encountered in the existing researches. By defining performance measures such as resource usability grade, semi-damaged component’s life time, and effective reliable bandwidth, we solve the key problems involved in the research work. Conducting this project can significantly contribute to realizing our strategic plan of future optical network development on both theoretical and technical aspects.

近年来，大规模灾难事件（地震、飓风、洪水，以及大规模杀伤性武器等）对光网络生存性造成的严重威胁已受到工业界和学术界的广泛关注。现有的光网络灾难抗毁研究通常建立在经验损毁模型基础上，难以准确描述复杂多变的灾难损毁过程，容易造成抗毁目标不明确、抗毁可靠性差、资源利用率低的情况。为此，本项目以地震灾难为背景，通过引入地震预警机制，研究基于灾难预警的网络损毁模型和抗毁方案决策模型。在此基础上，针对灾难造成的网络资源严重损毁和灾后业务流量激增的情况，研究并提出适应不同网络状态的临灾保护与恢复机制，以及相应的资源优化机制。通过采用阶段性灾难预警和分级量化资源可用性等方法，解决现有研究在网络性能评估和资源利用率方面遇到的障碍，通过研究定义资源可用性等级、半损毁组件生命期、有效可靠性带宽等性能指标，解决本项目中的一些关键问题。该项目的研究将为实现我国未来光网络建设的战略计划提供重要的理论和技术支持。

本项目针对大规模灾难事件对光网络造成的严重威胁，重点研究大规模地震灾难下的网络生存性机制。现有的光网络灾难抗毁研究通常建立在经验损毁模型基础上，难以准确描述复杂多变的灾难损毁过程，容易造成抗毁目标不明确、抗毁可靠性差、资源利用率低的情况。本项目通过引入地震预警机制，研究建立基于灾难预警的网络损毁模型和抗毁方案决策模型。在此基础上，针对灾难造成的网络资源严重损毁和灾后业务流量激增的情况，研究并提出适应不同网络状态的临灾保护与恢复机制，以及相应的资源优化机制。通过采用阶段性灾难预警和分级量化资源可用性等方法，解决现有研究在网络性能评估和资源利用率方面遇到的障碍，通过研究定义资源可用性等级、半损毁组件生命期、有效可靠性带宽等性能指标，解决本项目中的一些关键问题。本项目的顺利完成为实现我国未来光网络建设的战略计划提供了重要的理论和技术支持。