Summary: Nguyen, Son, Capacity and Throughput Optimization in Multi-cell 3G WCDMA Networks
Master of Science (Computer Science and Engineering), August 2005, 82 pp., 16 tables, 25
figures, 50 titles.
User modeling aids in the computation of the traffic density in a cellular network, which
can be used to optimize the placement of base stations and radio network controllers as well
as to analyze the performance of resource management algorithms towards meeting the final
goal: the calculation and maximization of network capacity and throughput for different
data rate services. An analytical model is presented for approximating the user distributions
in multi-cell third generation Wideband Code Division Multiple Access (WCDMA) networks
using 2-dimensional Gaussian distributions by determining the means and the standard de-
viations of the distributions for every cell. This allows for the calculation of the inter-cell
interference and the reverse-link capacity of the network.
An analytical model for optimizing capacity in multi-cell WCDMA networks is presented.
Capacity is optimized for different spreading factors and for perfect and imperfect power
control. Numerical results show that the SIR threshold for the received signals is decreased by
0.5 to 1.5 dB due to the imperfect power control. The results also show that the determined
parameters of the 2-dimensional Gaussian model matches well with traditional methods for
modeling user distribution.
A Call Admission Control algorithm is designed that maximizes the throughput in multi-
cell WCDMA networks. Numerical results are presented for different spreading factors and