Abstract
QoS and mobility is a field that still has some performance issues.
QoS degrade when IP based nodes become mobile. This thesis tries to
make IP based networks as good as cellular networks, when it comes to
mobility.
We focus on solving the added complexity introduced by QoS in mobility
management in the middleware layer, inside a remote binding.
The main problem states, that we should find out how a remote binding
can adapt and enhance QoS-parameters that perform poorly in IP based
mobility management.
The methods used are testing and prototyping. We test existing
mobility management software (Mobile IP based) and design, implement
and test a QoS-Aware Remote Binding, named MobiBind. A custom traffic
generator, KGen, was developed as part of this thesis, in order to
performe testing.
In the test of Mobile IP, we found that the QoS parameters; packet loss and seamlessness underperformed. We also found that hand-overs in IP based mobility takes about one second to complete.
MobiBind did manage to increase performance of both packet loss and
seamlessness in mobility management. This did however increase the
delay (round trip time).
We found that the main problem in mobility management is the
hand-overs, and the connection breakage of about one second. This
introduces QoS degeneration that in our Mobile IP tests showed up in
the QoS parameters packet loss and seamlessness. MobiBind increased
performance of these QoS parameters, at the cost of delay. This
indicates that there is a tradeoff between the different QoS
parameters, and that total QoS might be difficult to increase unless
the underlying problem is fixed, in this case; the connection
breakage. MobiBind enables application developers to control which
QoS parameters mobility management impacts.