IP-over-WDM网中不同等级业务间资源共享的多层保护算法

Differentiated Multi-layer Protection Algorithm with Inter class Resource Sharing for IP-over-WDM Networks

目前,人们普遍认为IP-over-WDM网络将成为未来骨干网的主流,但波分复用技术使得一根光纤的断裂可以导致大量数据的丢失,因此研究IP-over-WDM网络的生存性显得非常重要。为了进一步提高IP-over-WDM网络性能,文中基于辅助图模型(AGM),提出了分等级的多层保护算法和等级间业务备用资源部分共享策略,又提出了一种链路赋值的新方法。通过仿真实验可以发现,这一切大大降低了业务的阻塞率。

Nowdays, it is generally believed that IP-over-WDM networks would become the mainstream of future backbone nets. However, WDM technology may cause great loss in data due to one fiber break-down, consequently, it is very important to study the survivability of IP-over-WDM networks. To further improve the performance of IP-over-WDM networks, and based on auxiliary graph model （AGM）, differentiated multi-layer protection algorithm and partial inter-class backup resource sharing strategy are proposed, including a new method for link cost definition. Simulation experiment indicates that the blockage probability of the requests is greatly reduced.