Network Restoration Utilizing Load Distribution Factor as Survivability Performance Index

In an event of failure, network survivability performance could be demonstrated through restoration. Link restoration is the simplest restoration technique provided by determining paths around a failed link. Our aim is to represent the load distribution level with appropriate values. Therefore, we propose a novel performance index scheme for evaluating how well the restoration scheme can distribute the disrupted traffic among restoration paths. A modified restoration scheme is proposed in order to consider load distribution in path computation by using link restoration technique. Experimental results show that our proposed index forms a good representation of survivability value. By using our proposed restoration scheme, the network load distribution is improved, compared with the shortest path scheme. The outcome of the restoration ratio are also improved equally well when traffic demands are increased or spare capacities is insufficient