Minimizing resource reservation for multicast protection with multi-layer approach

Resource utilization is an important issue that needs to be taken into account when providing recovery mechanism in networks. In this paper, we investigate the recovery scheme for multi-layer network which cannot only manage the operation confusion among each layer, but also reserve network resources effectively. Then, we proposed an algorithm that adapts the concept of multi-layer approach to multicast protection in order to recover the failures and reduce network reserved resources at the same time. In our design, four types of failure, i.e. optical link failure, optical node failure, IP link failure and IP node failure are considered. The simulation results show that our algorithm can provide multicast protection which uses less reserved resources compared to the traditional shortest hop algorithm. The difference will be more significant if our algorithm is implemented in the network topology with high average node degree.