Study on optical network survivability with GMPLS technology

Survivability will be an important asset of the emerging GMPLS controlled optical networks. It is widely recognized that future transport networks will have to evolve to support the well-known growth of data traffic and new emerging network requirements such as fast and flexible provisioning, multiple levels of quality of service (QoS), optical rerouting, and fast restoration. A series of recovery schemes have been proposed by IETF under GMPLS framework to provide different tradeoffs between these requirements. The recovery schemes are implemented through specific recovery strategies including algorithms and protocol extensions. This paper first presents a survey on these recovery schemes and also on the recovery strategies available in literature to implement them. Then the performance of these recovery schemes will be analyzed and compared both theoretically and through simulation.