Grooming and Protection With Availability Guarantees in Multilayer Optical Networks

Survivability is a key concern in modern network design. This paper investigates the problem of survivable dynamic connection provisioning in general telecom backbone networks, which are mesh structured. Authors assume differentiated services where connections may have different availability requirements, so they may be provisioned differently with protection (if needed) based on their availability requirements and current network state. The problem of effectively provisioning differentiated services requests, widely considered in single-layer networks, assumes peculiar features if sub-lambda request is considered to be protected (or more generically, whose availability target has to be guaranteed), but also have to be groomed for an efficient use of network resources.