Backup reprovisioning to remedy the effect of multiple link failures in WDM mesh networks

As networks grow in size and complexity, both the probability and the impact of failures increase. The pre-allocated backup bandwidth, which has been widely investigated in the literature, may not be able to provide full protection guarantee when multiple failures occur in a network. In this study, we consider multiple concurrent failures where concurrent means that a new failure occurs before a previous failure is repaired. To combat the effect of multiple concurrent failures, new backups can be reprovisioned after one failure such that the next potential failure can be handled effectively and efficiently. We consider dynamic traffic where a pair of link-disjoint primary and backup paths is provisioned when a new connection request arrives. After a failure occurs, the affected connections switch traffic from their primary paths to backup paths. To protect against next potential failure, we reprovision new backups for connections that become unprotected or vulnerable because of losing ...

• Type: Journal
• Year: 2006
• Where: JSAC
• Authors: Jing Zhang, Keyao Zhu, Biswanath Mukherjee
• Keywords: Backup, JSAC 2006, Multiple Concurrent Failures, Potential Failure