Determination of the Availability of a Shared Backup Channel

Capacity efficient distributed routing of mesh-restored lightpaths in optical networks

A mesh-restored lightpath in an optical network has a primary route and a diversely routed backup route. The wavelength channels on the primary route of a mesh-restored lightpath are dedicated for that lightpath whereas the wavelength channels on the backup route are shared among different mesh-restored lightpaths. Wavelength channels are shared in a way that ensures restoration of all lightpat...

Availability-driven optimal design of shared path protection in WDM networks

Availability, defined as the fraction of time a network service is operative, is a key network service parameter. Dedicated protection increases availability but also the cost. Shared protection instead decreases the cost, but also the availability. In this article, we formulate and solve an integer linear programming (ILP) model for the problem of minimizing the backup resources required by a ...

Efficient channel reservation for backup paths in optical mesh networks

In an optical mesh network, backup channels are shared between multiple lightpaths to reduce restoration capacity overhead. The sharability of channels is usually constrained by the mandate to provide 100% recovery of all lightpaths affected by any single event failure in the network. This paper proposes a pool based channel reservation scheme that is optimal when the set of primary and backup ...

Dynamic establishment of differentiated survivable lightpaths in WDM mesh networks

In the emerging next-generation transport networks, called intelligent optical transport networks, DWDM-based optical components like add-drop multiplexers and optical cross connects will have full knowledge of the wavelengths in the network, status, and traffic carrying capacity of each wavelength. With such intelligence, these intelligent optical networks could create self-connecting and self...

Online Storage Management: The SAN Virtualization Layer LAN-Free Backup: Reducing the Backup Window Clustering for Improved Availability LAN Free HSM to Shared Tape Libraries