Survivable Networks: Algorithms for Diverse Routing
Survivable Networks: Algorithms for Diverse Routing
Loopback recovery from double-link failures in optical mesh networks
IEEE/ACM Transactions on Networking (TON)
Lightpath re-optimization in mesh optical networks
IEEE/ACM Transactions on Networking (TON)
Availability analysis of span-restorable mesh networks
IEEE Journal on Selected Areas in Communications
Backup reprovisioning to remedy the effect of multiple link failures in WDM mesh networks
IEEE Journal on Selected Areas in Communications - Part Supplement
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In this paper, we present a new hybrid protection and restoration scheme to handle two-link failure in WDM mesh networks. Some existing schemes for handling two-link failure use two backup paths to protect each demand or each link. Others reprovision backup paths for affected demands after the first link failure. Our hybrid scheme is more capacity efficient than previous schemes while being able to protect most of the demands upon two-link failure. The protection component of our hybrid scheme reserves backup capacity intelligently to ensure the majority of the affected demands can be restored using pre-planned backup paths upon two-link failure. For the rest of the affected demands, the restoration component of our hybrid scheme dynamically finds new backup paths to quickly restore them. The capacity efficiency and protection/restoration capability of our hybrid scheme are demonstrated through numerical results.