Hybrid Protection and Restoration Mechanism for High Speed Networks

This paper highlights network survivable schemes in order to guarantee both protection and restoration in high speed networks. In this paper, a hybrid protection and restoration mechanism has been proposed whose objective is allocating the bandwidth in a way that minimizes the total amount of bandwidth used for working and protection paths. In the proposed mechanism, path-based protection has been considered because it yields lower overhead and is also suitable for global optimization where, in case of a single link failure, all the flows utilizing the failed link are re-routed to a pre-computed set of paths. The simulation results demonstrate that proposed mechanism is much more efficient as it provides better quality of services (QoS) in terms of network resource utilization, blocking probability etc. as compared to conventional protection and restoration schemes. The proposed mechanism seems to quantify not only the capacity savings but also offers an attractive combination of features, with both ring like speed and mesh-like efficiency.