The simulator tool used in this study is a dynamic,
time-driven network level simulator for GSWGPRS
and EDGE' performance evaluation. A dynamic
simulator models the causality and time correlation
between the events in the simulated network, which
bring the needed determinism in the simulated system
- in each simulation step the time is increased and
mobiles move along their paths. An important
property is the correlation of the signal with the
evolving simulation time, which is crucial when
modeling features like fast (multipath) fading and
frequency hopping in the simulator. Modeling of user
mobility leads to handover and cell reselection events,
which can play an important role in the end-user
perfOnnanCe.
The time resolution of the simulator is one TDMA
frame, i.e. 4.615 ms. Carrier-to-Interference-Ratio
(CIR) is calculated for every traflic burst in the whole
network, taken into account noise level and both COchannel
and adjacent channel interference. Link level
simulation results are made separately and imported
into system simulator by burst-level look-up tables