Keio University, Graduate School of Media and Governance
MAUI Project
Ph.D. Dissertation

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ACADEMIC YEAR 2007( March 23th, 2008 )
TITLE End System Based Handover Management for Multihomed Mobile Internet

The key aspect of the future Internet is that it has ubiquitously deployed wireless access networks. At many locations, chances are you will be right in the middle of several wireless networks. Thus, a future mobile terminal is equipped with multiple wireless network interfaces (multihomed), and it switches between or simultaneously uses these interfaces according to network conditions and user demands. How to provide the best possible connectivity to mobile users in such a Multihomed Mobile Internet is the proposition of this research.

In general, handover is the process of switching an ongoing network connection from one network to another. The traditional handover management thus aims to change the default route without service interruption. Hence, the mobile terminal is able to use only one network at the same time. This means all different types of user services are routed via the same network although the node is multihomed. Ideally, each service must be routed via its suitable network.

In order to solve this issue, flow-oriented smooth handover management architecture is proposed in this research. The new end-system architecture is designed based on the separation of Path maintenance and Flow migration concept. The IP path maintenance is executed per interface and it aims to maintain the path as much as possible. The handover is executed per flow and it aims to route the flow via the suitable network among the several IP paths provided by the Path maintenance module.

Another key concept is Handover services that provide cross-layer and inter-node interactions. The handover involves many processes across layers so that a combination of optimizations at each layer is required to enhance the performance. Handover services assist to integrate and cooperate various seamless handover and network condition adaptation techniques.

As the result of the empirical experiments, it is confirmed that our system shows the best possible performance in all handover scenarios.

Keywords: Heterogeneous Networking, IP Mobility, Seamless Handover, Multihoming, Adaptive Application

CONTACT To obtain the whole paper, please contact;
MITSUYA, Koshiro ( mitsuya at )

MAUI Proejct
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