Testing Triple Play Services Over Open Source IMS Solution for Various Radio Access Networks

Abstract — Nowadays, with the development of next generation networks, new standards for voice and video services have been introduced, and VoIP (Voice over IP) has become a very popular protocol. It leads to the convergence of networks which provide voice and data transfer services with enhanced and improved applications for customers. As a key element of the next generation networks, IMS (IP Multimedia Subsystem) architecture aims to offer multimedia services via fixed-mobile convergent solutions. In this paper, a work model offering triple play services via a UMTS network and an IMS subsystem is realized. This model is realized through an Open Source software solution for an IMS subsystem, and the success of the triple play service provided by this system is analyzed. Testing of access networks and of different codecs using an Open IMS Core system and a UMTS access network is carried out. The most successful codec is determined and proposed for use while offering triple play services. Further, an optimization of the UMTS radio-access network of a middle size operator is done by planning the optimal number of NodeB’s for this software solution and the dimensioning and optimization of the same. The conclusion is that, from the standpoint of offering triple play services to a certain number of users, no significant extensions of the radio network capacity are needed. The resulting system for offering triple play services is functional and optimized for exploitation in an active network with high reliability