In this paper a dynamic network level simulator
was introduced which can be used to investigate the
behavior of GPRS network in a realistic environment.
From the research point of view, we obtained the
function of capacity and spectrum efficiency versus
network load, capacity and spectrum efficiency under
certain network QoS. We studied the performance of
radio resource algorithms - link adaptation, power
control, cell re-selection etc. and we found out which
algorithm gives the best capacity. In addition, lots of
other output data were produced that can be used for
many purposes, especially for dimensioning of the
GPRS network elements and interfaces. From the
network performance point of view, we found out the
key factors affecting to the GPRS network
performance and identified the key parameters that
have control over them; we fine-tuned those
parameters to have an optimum network performance
in specific cases. We learned to better understand the
dynamic behavior of GPRS network, which improves
the competence in network analysis and optimization.
Finally, we got better prepared for potential pitfalls
and capacity bottlenecks when introducing GPRS
gradually into an existing GSM network.