Abstract:
With the explosive growth of multimedia services in the telecommunication industry
due to the increase in the role of communication in the recent past, Quality of Service
(QoS) provisioning and ensuring fair bandwidth allocation has become more and
more challenging. Moreover, bandwidth being a valuable and a scarce resource, it
should be used efficiently. It has emerged that use of small cells is a better solution
for achieving a higher capacity but it has its limitations. The consequence of using
small cell sizes is the increased rate of call handovers as mobile users move between
cells. In a network supporting multimedia services, frequent handovers not only result
in network overload, but, and more importantly, may adversely affect the QoS of
the calls due to handover failures. Therefore it cannot be argued that in a congested
environment efficiency can be increased by increasing capacity. The best solution is
to administer good resource management schemes. This necessitates for methods to
manage handovers so that the mentioned problems do not occur.
To reduce handover failures and achieve high bandwidth utilization, a design of an
efficient multi-class integrated framework for Call Admission Control (CAC) and
adaptive bandwidth allocation for multimedia services in mobile cellular networks
is presented. The scheme exploits a new prioritized adaptive bandwidth-allocation
strategy that allows the reclamation of more bandwidth from on-going non-real time
calls up to an optimally determined threshold.
From the simulations, the result obtained in this thesis report shows that under the
adaptive bandwidth allocation scheme developed, the quality of service parameters
such as throughput, packet loss, end to end delay and jitter can be controlled to satisfy
the QoS requirement according to users’ requirements compared to Conventional
Internet Protocol(IP) only scheme.
