IMS: Model and calculation method of telecommunication network's capacity

TLDR: The article analyzes the functioning of the IMS core in solving the problems of conjugation of transport and signal flows and proposes a model that allows to calculate the volume of incoming traffic from heterogeneous networks and its value after conversion to a standard form in accordance with the requirements ofThe IMS architecture.

Abstract: Solving the problems of convergence networks of various technologies, ensuring their compatibility at the level of control, signaling and traffic flows is connected with bringing the networks in compliance with the requirements of the IMS (IP Multimedia Subsystem) architecture. In the process of network pairing, two main tasks must be solved. The first is the interconnection of networks of different technologies for signaling. The second task is to ensure the interaction of networks at the level of traffic flows. When solving the first task, all kinds of signaling are transferred to the use of the SIP protocol. And when solving the second task, all types of transport streams are transferred to the stack protocols of IP network. All pairing tasks are addressed at the element management level CSCF (Call Session Control Function), P-CSCF (Proxy Call Session Control Function), I-CSCF (Interrogating CSCF), S-CSCF (Serving-CSCF). When designing the IMS management layer, it is necessary to determine the amount of traffic that will be served by CSCF elements. And then calculate the necessary performance of the branches of the telecommunications network to handle the signal and transport load. The article analyzes the functioning of the IMS core in solving the problems of conjugation of transport and signal flows. A list of the main elements involved in the management process has been determined. A model is proposed that allows to calculate the volume of incoming traffic from heterogeneous networks and its value after conversion to a standard form in accordance with the requirements of the IMS architecture. The requirements for the telecommunications component of the IMS architecture are defined.