Abstract
The subject of the study is multiservice communication network using the concept NGN (Next Generation Network) based on the open network architecture IMS (Internet Protocol Multimedia Subsystem), supporting a wide 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 <i>GI</i>/<i>G</i>/1/<i>N<sub>6H</sub></i> 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.
Highlights
Intensive development of the multiservice communication networks packet switched using the architectural concept NGN requires improving probable time response characteristics of a subsystem of a multimedia communication IMS (Internet Protocol Multimedia Subsystem) in case of establishment connections and when rendering the multimedia services providing QoS packets of a traffic systems and signaling protocols [1,2,3].The system and technical analysis showed [ 4, 5] that a great number telecom operators, the providing multimedia services, the management systems transmission of the official traffic realizing Triple play services such as voice services with a possibility activation multimedia applications, video telephony, IPTV, voice and high speed Internet access use
Support of quality of service QoS & QoE is the key requirement to a subsystem IMS and an important index efficiency of the NGN/IMS networks in case of establishment of a multimedia session
Results of the numerical analysis on a figure 2 the dependence average time establishment of a multimedia sessions is provided to the NGN/IMS networks from intensity of the entering flow packets of a signal traffic and transmission rate of a multimedia traffic
Summary
The system and technical analysis showed [ 4, 5] that a great number telecom operators, the providing multimedia services, the management systems transmission of the official traffic realizing Triple play services such as voice services with a possibility activation multimedia applications, video telephony, IPTV, voice and high speed Internet access use. Such approach allows to integrate different services, gives ample opportunities personalization and increase in number multimedia services. The matter is studied insufficiently well and remains low-probed [1,2,3, 7,8,9,10,11,12]
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