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Network Virtualization is a key technology for the Future Internet, as it allows the deployment of independent virtual networks using resources of the same basic infrastructure. An important challenge in the dynamic provision of virtual networks resides in the optimal assignment of physical resources (nodes and links) to requirements of virtual networks. This problem is known as Virtual Network Embedding...
The Virtual Optical Network Embedding problem, also called VONE, deals with the efficient mapping of virtual resources onto opticals networks. This study proposes a heuristic algorithm called Sd-Mapping to resolve the VONE problem using traffic grooming techniques to carry several lower traffic requirements onto a single wavelength. The proposed algorithm it is compared with an reference algorithm...
This work deals with the survivable optical network design problem for static multicast traffic, subject to simple node fails. Given a set of multicast request, it is proposed an algorithm based on Multi-Ojective Ant Colony Optimization which tries to find the best network design, as well as the primary and back-up multicast trees, with protection against node fails. The proposed algorithm simultaneously...
Survivability against link failures in WDM optical networks with dynamic traffic, i.e. requirements that change in time, has become very important because it is a more realistic approach than static traffic. This work evaluates the efficiency of the protection method based on p-cycles or pre-configured protection cycles, with a multi-objective approach, optimizing simultaneously network resources...
This work presents a new mining model to train Radial Basis Neural Network (RBNN) for short term prediction. Training is performed in two phases. First, weights of the radial basis function (RBF) are trained and in the second phase, a competitive cooperative coevolutionary multiobjective algorithm is used to determine the parameters for each RBF node. The model has been applied to real problems in...
The techniques for protection against failures in optical networks have been discussed in many scientific papers. In the case of Wavelength Division Multiplexing (WDM) optical networks, the p-cycles strategy of protection is a promising approach that combines the speed of ring protection and efficiency of resource utilization in mesh protection. In real networks, several optical links may fail at...
The study of protection against failures in WDM optical networks plays strategic importance due to huge bandwidth of optical fiber. The p-Cycle is a novel protection approach based on pre-configured cycles to provide a fast recovery for single link failure. The optimal selection of cycles is the central problem to get a high protection performance of p-Cycle approach. In that sense, the importance...
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