An Improved Approach for Online Backup Reprovisioning Against Double Near-Simultaneous Link Failures in Survivable WDM Mesh Networks

This paper investigates backup reprovisioning technique to mitigate the impact of double near-simultaneous link failure scenarios. First, a refined model is introduced for accurate identification of vulnerable connections after the failure of the first link. Then, an improved approach termed Successive Backup Reprovisioning (SBR), is developed for online backup reprovisioning to further reduce the number of affected connections when no extra capacities are added to the network for reprovisioning purpose. Complexity analysis and simulation results show that SBR has advantages in tradeoff between capacity efficiency and execution speed