Ying-Hsin Liang

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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)
The universal mobile telecommunications system (UMTS) and long term evolution (LTE)/LTE-advanced specifications have been proposed to offer high data rate for the forwarding link under high-mobility wireless communications. The keys include supporting multi-modes of various coding schemes (e.g., VSF-OFCDM, OFDM, OFDMA), multiple-input multiple-output, relay(More)
1 Abstract — In a heterogeneous wireless network (HWN) that consists of various wireless networks (e.g., WiMAX and WiFi) and cellular communications (e.g., B3G and 4G), vertical handoff acts as an important mechanism for achieving continuous seamless transmissions and improving grade of service. This work thus proposes an adaptive vertical handoff algorithm(More)
The use of Wireless Sensor Network (WSN) has proved to be a very beneficial in the design of adaptive and dynamic traffic light intersection system that will minimize the waiting time of vehicles and also manage the traffic load at the intersection adaptively. In this paper, we propose an adaptive traffic intersection system based on Wireless Sensor Network(More)
Handover decision algorithms are essential components for the successful implementation of mobility which is the basic concept of mobile communication. These algorithms need to be designed to provide the required Quality of Service (QoS) to a wide range of applications while allowing seamless roaming among a multitude of access network technologies. Wrong(More)
For achieving multicast routing in self-organizing wireless on demand networks, the multicast ad hoc on-demand distance vector (MAODV) routing protocol is proposed. In MAODV, a multicast tree is created when a sender wants to send packets to several receivers in mobile ad hoc networks (MANETs). In such ad hoc networks, wireless links may be lost(More)