Shebanova L. Structure improvement method for transport telecommunication networks by the multi-objective optimization

Object: telecommunication network structure determination and improvement process based on the criterion: networks dependability, capacity and installation costs. Research objective: improving of telecommunication transport network operation by the criterion: networks dependability, capacity and installation costs. Methods: multi-objective optimization methods in conditions of uncertainty or partial uncertainty, fuzzy-possibility methods, mathematical-statistical methods, nonlinear programming methods. Scientific novelty: 1. Mathematical models of networks dependability, capacity and installation costs are improved. The models consider the ability of SDH networks to be restored with traffic protection circuit. 2. The multi-objective optimization method for telecommunication transport networks combine the methods used in conditions of uncertainty or partial uncertainty and Sugeno fuzzy-possibility method is improved. Combination of the proposed methods allows to determine optimum on the alternative ranges. 3. The thesis pioneers the use of the organizing network method for the telecommunication transport networks different from other existent methods with the search rule of network candidate nodes for clustering. The proposed method makes possible to group network nodes with equal capacity on basis of the information about distance between network nodes and economic indicators. 4. The thesis pioneers the use of the transport telecommunication network structure determination method. Мethod makes it possible to determine the most efficient telecommunication network structure taking into account the alternative criterion. It guarantees the high performance of the transport telecommunication network. Theoretical results: new method for planning of the transport telecommunication network structure and new transport telecommunication network structure management possibilities for the operation phases is proposed. It guarantees the high performance of the transport telecommunication network. Practical results: - the software automatizes the rational decision search process for the transport telecommunication network structure and reduces expended time (software - 184 s, experts - 36 hours); - quality metrics: damage stability margin 58%, reliability margin 3%, BER margin without failed nodes 4 10-11 represent degree of performance improvement for the transport telecommunication network based on decision of more expedient network structure with the developed structure determination method. Application of the achievements of science to production: developed software uses for rational decision search for the transport telecommunication network structures of mobile network operator PrJSC "MTS Ukraine" (application statement from 03.02.2011) and fixed network operator LC "Promtelecom" (application statement from 15.03.2011) for new segments planning of transport telecommunication networks and modernization of existent networks. Вranch of use: telecommunications.