Trunking capacity estimation for wide area multicell private mobile radio networks

In this paper, we propose a more realistic trunking capacity estimation for full duplex voice calls under call queuing strategy for multicell private mobile radio networks (PMR), such as TETRA (terrestrial trunked radio). The traditional approach has been based on a simple delay system (Erlang C). However, the generated calls can be classified in two different types: inter-site and intra-site calls, with different requirements of resource occupation. We show a numerical way of estimating the system capacity for mixed inter-site and intra-site voice calls and compare the curves obtained as a result of this new point of view with the Erlang C curves. Results show that this new approach allows to get more accurate capacity estimation in the performance analysis of the system.