Abstract:
Wideband Code Division Multiple Access (WCDMA) is
the multiple access technique used in the third generation
of mobile telecommunication (3G) systems. Capacity of
this technique does not have an exact limit. The maximum
capacity of WCDMA depends on current interference in
the system. However, high interference causes the system
a degradation of quality-of-service (QoS). Therefore, a
mechanism to suppress the interference is vital. Call
Admission Control (CAC) is a mechanism capable for
maintaining the interference below a threshold. This
report presents a basic simulation description necessary
for demonstrating a simulation of a simple WCDMA
system with CAC. The report includes some fundamental
theories about a WCDMA system, traffic modeling, and
CAC algorithms. Some simulation results are also given.
The simulation results show that the blocking probability
depends on the average number of users and thresholds.
The results also show that much data traffic is blocked
although the capacity is still available. This leads us to
realize the importance of a mechanism to handle data
traffic in the multi-traffics WCDMA system.
