Date Added: Aug 2009
Survivability becomes an important issue in optical networks due to the huge bandwidth offered by optical technology. Many works have studied network survivability. The majority of these works are typically destined to single-domain. In this paper, the authors address the survivability in multi-domain optical networks. This paper provides a classification of the existing protection solutions proposed for multi-domain networks and analyses their advantages and limitations. They propose a new solution for multi-domain optical networks based on p-cycles. For scalability and security reasons, they also propose a topology aggregation model adapted to the p-cycles computation. This aggregation model allows their proposed solution to find a trade-off between two competing goals: efficient use of backup resources and small running time.