Optical networks: a practical perspective
Optical networks: a practical perspective
Artificial intelligence: a new synthesis
Artificial intelligence: a new synthesis
Routing and Wavelength Assignment for Establishing Dependable Connections in WDM Networks
FTCS '99 Proceedings of the Twenty-Ninth Annual International Symposium on Fault-Tolerant Computing
Lightpath restoration in WDM optical networks
IEEE Network: The Magazine of Global Internetworking
A review of fault management in WDM mesh networks: basic concepts and research challenges
IEEE Network: The Magazine of Global Internetworking
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Contemporary link failures in a WDM optical network results in a very high value of call drop probability (CDP). In a backbone network, a link usually carries a huge amount of data and a low CDP is desirable. To address this issue, in this work, we propose a “path-based backup multiplexed survivable strategy”, namely “dynamic recursive assignment of backup lightpath” (DRABLP). To ensure optimality in backup lightpath assignment, we have used a novel search algorithm, a variant of best first search. This algorithm is triggered at the occurrence of each failure and subsequent repair of a link. We have studied the performance of DRABLP w.r.t. CDP and new call blocking probability for varying network load. A comparison with another “path-based backup multiplexed survivable strategy”, namely “without recursive assignment of backup Lightpath” (WORABLP), shows that DRABLP has smaller CDP than WORABLP when there are consecutive link failures within short span of time.