Yuriy D. The development of information and communication network infrastructure for e-government systems.

The thesis is devoted to the study of methods for building of modern network systems to implement the concept of e-government in Ukraine, i.e. the development of network infrastructure of e-government, providing an efficient distributed network platform for the interaction of state and local governments between themselves and society, peoples and citizens, and businesses through information and communication technologies in conditions of large workload and servers presence with a large number of services. The work carried out requirements that apply to multiservice network infrastructure that is essential in providing access to services within e-government systems. Analysis of the concept of multiservice backbone network infrastructure management based on software switching technologies defines and analyzes the main features of the Softswitch technology use. The thesis investigates the relationships between the main parameters of a distributed service platform and indicators of quality of service in it. The solution was retrieved to the problems of forecasting and flow distribution within the proposed method of parameters calculating for a distributed service platform. In addition, the ways of developing a methodology for data protection in e-government systems, methods and tools to deal with congestion of network infrastructure were carried out. On the basis of the mathematical models were elaborated the characteristics of the service platform with open interfaces according to the Parlay API architecture were calculated. Results obtained in the thesis are the basis for the calculation and implementation of high-performance distributed service platforms such as part of the development of information and communication network infrastructure for e-government systems.