QoS and mobility is a field that still has some performance issues.QoS degrade when IP based nodes become mobile. This thesis tries tomake IP based networks as good as cellular networks, when it comes tomobility.
We focus on solving the added complexity introduced by QoS in mobilitymanagement in the middleware layer, inside a remote binding.
The main problem states, that we should find out how a remote bindingcan adapt and enhance QoS-parameters that perform poorly in IP basedmobility management.
The methods used are testing and prototyping. We test existingmobility management software (Mobile IP based) and design, implementand test a QoS-Aware Remote Binding, named MobiBind. A custom trafficgenerator, KGen, was developed as part of this thesis, in order toperforme 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 andseamlessness in mobility management. This did however increase thedelay (round trip time).
We found that the main problem in mobility management is thehand-overs, and the connection breakage of about one second. Thisintroduces QoS degeneration that in our Mobile IP tests showed up inthe QoS parameters packet loss and seamlessness. MobiBind increasedperformance of these QoS parameters, at the cost of delay. Thisindicates that there is a tradeoff between the different QoSparameters, and that total QoS might be difficult to increase unlessthe underlying problem is fixed, in this case; the connectionbreakage. MobiBind enables application developers to control whichQoS parameters mobility management impacts.