| Summary: | The telecommunications industry is experiencing an unprecedented demand for mobile
communication services. It is expected that mobile subsribers will increasingly use multimedia
services such as data, voice, and video applications.
In this thesis, we study the access mechanism (medium access control (MAC) protocol
and bandwidth allocation strategy) used in the RACE R2084 Advanced Time Division Multiple
Access (ATDMA) system which focuses on the development of a third generation cellular system
known as the Universal Mobile Telecommunication System (UMTS). In particular, we propose
improvements to the ATDMA access mechanism which allow the base station to dynamically
assign bandwidth to voice and video services based on their activity levels. The performance of
the modified access mechanism is evaluated using the access delay and packet dropping probability
experienced by the voice and video services under varying traffic-load conditions. For video
service, it is shown that the modified access mechanism can increase the ATDMA system capacity
by as much as 45% when compared to the original access mechanism. In supporting voice and
video traffic simultaneously, simulation results show that the modified access mechanism can
increase the system capacity, in general, while satisfying the QoS requirements for both voice and
video services. === Applied Science, Faculty of === Electrical and Computer Engineering, Department of === Graduate
|
|---|
