Ben-Jye Chang

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The multicast mobile ad-hoc network (multicast MANET) is proposed for a sender sending packets to several receivers through a multicast session. Since members of a multicast group changes frequently, the issue of supporting secure authentication and authorization in multicast MANET becomes more critical than the network provided a fixed central(More)
The main goal of vehicle navigation systems is to determine the optimal routing path for achieving the least travel time and exhausted gasoline. Most navigation systems use the static shortest path routing algorithm or use optional traffic information broadcasted by a centralized traffic information center (TIC) to avoid routing to heavy traffic load roads.(More)
Vertical handoff provides continuous and seamless transfer between various wireless mobile networks, which have different data transmission techniques and standards. In contrast to the horizontal handoff, the vertical handoff should consider not only the strength of signal power but also QoS classes, network bandwidth and service types, etc. Most of the(More)