RESEARCH AND ANALYSIS PERFORMANCE INDICATORS MULTISERVICE SIGNAL NETWORKS NGN/IMS

Object of research is multiservice communication networks with use of the concept NGN (Next Generation Network) on the basis of an open network architecture IMS (Internet Protocol Multimedia Subsystem), supporting full range of services. The basis of this architecture is the IMS core, consisting of a set of specialized modules responsible for various functions for customer service. The purpose of the article is to analyze the existing technical capabilities of the IMS multimedia messaging subsystem and perspective solutions for the functioning of the NGN/IMS network efficiency in providing multimedia services. The effectiveness NGN/IMS networks during the establishment of a multimedia session was analyzed and the functional architecture of the IMS multimedia messaging subsystem that determine the interaction of NGN signaling systems an protocols was explored. One of the important requirements for the IMS subsystem is the maintenance QoS (Quality of Service) A mathematical model for estimating the quality of communication services using a system GI G Nбн / /1/ based on the theory of diffusion approximation is proposed. On the basis of the model analytical expressions are obtained, which allow evaluating the performance indicators of the Triple Play service