Hierarchical Multiobjective Routing Model in MPLS Networks with Two Service Classes – A Comparison Case Study, Journal of Telecommunications and Information Technology, 2012, nr 2

A two-level hierarchical multicriteria routing model for multiprotocol label switching networks with two service classes (QoS, i.e., with quality of service requirements, and best effort services) and alternative routing is reviewed in this paper. A heuristic resolution approach, where nondominated solutions are obtained throughout the heuristic run and kept in an archive for further analysis is also reviewed. In this paper, an extensive analysis of the application of this procedure to two reference test networks for various traffic matrices is presented. Also a comparison of the results of our method with a lexicographic optimization approach based on a multicommodity flow formulation using virtual networks is carried out. Finally, results of a stochastic discrete event simulation model developed for these networks will be shown to illustrate the effectiveness of the resolution approach and to assess the inaccuracies of the analytic results

Hierarchical Multiobjective Routing in MPLS Networks with Two Service Classes – A Meta-Heuristic Solution, Journal of Telecommunications and Information Technology, 2009, nr 3

The paper begins by reviewing a two-level hierarchical multicriteria routing model for MPLS networks with two service classes (QoS and BE services) and alternative routing, as well as the foundations of a heuristic resolution approach, previously proposed by the authors. Afterwards a new approach, of meta-heuristic nature, based on the introduction of simulated annealing and tabu search techniques, in the structure of the dedicated heuristic, is described. The application of the developed procedures to a benchmarking case study will show that, in certain initial conditions, this approach provides improvements in the final results especially in more “difficult” situations detected through sensitivity analysis

Journal of Telecommunications and Information Technology, 2012, nr 2

kwartalni

Journal of Telecommunications and Information Technology, 2009, nr 3

kwartalni

A meta-model for multiobjective routing in MPLS networks

Routing, Multiobjective optimisation, Telecommunication networks, MPLS/Internet,