Institute of Information Theories and Applications FOI ITHEA
The aim of this paper is to be determined the network capacity (number of necessary internal switching
lines) based on detailed users’ behaviour and demanded quality of service parameters in an overall
telecommunication system. We consider detailed conceptual and its corresponded analytical traffic model of
telecommunication system with (virtual) circuit switching, in stationary state with generalized input flow, repeated
calls, limited number of homogeneous terminals and losses due to abandoned and interrupted dialing, blocked
and interrupted switching, not available intent terminal, blocked and abandoned ringing (absent called user) and
We propose an analytical - numerical solution for finding the number of internal switching lines and values of the
some basic traffic parameters as a function of telecommunication system state. These parameters are requisite
for maintenance demand level of network quality of service (QoS). Dependencies, based on the numericalanalytical
results are shown graphically.
For proposed conceptual and its corresponding analytical model a network dimensioning task (NDT) is
formulated, solvability of the NDT and the necessary conditions for analytical solution are researched as well. It is
proposed a rule (algorithm) and computer program for calculation of the corresponded number of the internal
switching lines, as well as corresponded values of traffic parameters, making the management of QoS easily.