Robust Network Design using Topology Characteristics

This paper studies robust network recovery method using logical ring architecture embedded in network topology. We present topology information based capacity provisioning methods for WDM optical networks which are widly used as a backbone architecture of current Internet. The efficiency of spare capacity provisioning is a key issue in survivable network design. In the methods, the spare wavelengths are reserved to perform optical link protection using only topology information of a network without need to calculate the amount of on-going traffic of the network, thus provide simple and efficient spapre capacity planning. The basic idea of the topology information based methods is embedding virtual cycles to perform recovery on the network topology graphs. We compare the proposed scheme with other topology information based schemes. We provide performance analysis of the topology information based schemes by the numerical calculation using cut-sets of the topology graphs, and compare it with computer simulation results.