Abstract
Up to now, most research on optical multicast protection has been focused
on link failure recovery, due to its predominance. Nevertheless, the impact
of node failures is more severe, although they are less frequent. In a network,
it might be less cost effective to implement dedicated protection approaches
for separate link failure recovery and node failure recovery. A combined node
and link failure recovery approach is more cost-effective and very crucial
to network survivability. Hence, in this paper, we provide a detailed performance
evaluation of several types of optical multicast protection approaches for
100% combined node and link failure recovery. The optical multicast protection
approaches considered in this paper include the node-and-link protecting ${p}$-cycle based
approach, the tree-protecting ${p}$-cycle based approach and the optimal path pair based approach.
Among them, the node-and-link protecting ${p}$-cycle based approach is newly proposed
in this paper, which is a novel multicast application of previously reported
ordinary ${p}$-cycle
approach. Simulation results show that the integer linear programming based
spare capacity optimization of node-and-link protecting ${p}$-cycle algorithm achieves the best
capacity efficiency, for static traffic. For dynamic traffic, the efficiency-score
based heuristic algorithm of node-and-link protecting ${p}$-cycle outperforms the other heuristic
algorithms.
© 2009 IEEE
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