Abstract:
Vertical Hando is becoming more and more important area of research in
recent years. The demand for high data rates and high capacity wireless Internet
access from mobile users has led to the integration of third and fourth
generation networks with the legacy technologies using MIPv6 as a mobility
service. In order to provide high QoS for the majority of the multimedia applications,
MIPv6 is further assisted by MIH during vertical handover process
for seamless connectivity. However, MIH assisted MIPv6 does not ful ll the
QoS requirement of these applications owing to the fact that these standards
do not negotiate in the occurrence of any congestion event, such as high
packet loss etc. The main focus of this thesis is to evaluate and improve the
performance of MIH assisted MIPv6 to accomplish the QoS requirements
for most of the multimedia applications, by initiating MAC layer triggers,
during the vertical handover process. First we develop a simulation model
that runs MIH on top of the MIPv6 to enable the exchange of triggers and
to achieve e cient mobility services. We then carry out a comprehensive
analysis to determine the thresholds of QoS requirements for the multimedia
applications to appropriately commence the triggers so that to facilitate
the end subscribers timely negotiate their connections. Our study reveals
that, compared to the basic MIH assisted MIPv6, the proposed mechanism
achieves better QoS requirements for the multimedia applications in terms
of packet loss, delay, jitter etc. during the handover process. We show that
the proposed mechanism reduces the handover delay by 19% and achieves
better performance.
