Soo-Hoon Moon

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Seamless handover is an essential feature of cellular networks. For small-cell networks, effective handover becomes particularly challenging. If some cells may be activated and deactivated dynamically, effective handover handling will become even more difficult. A key factor of good handover performance is “handover timing,” that is, making handover(More)
In wireless sensor networks (WSN), energy efficiency is critical, particularly for large-scale deployments. In this paper, we analyze the benefits of using dual-radio, from the perspective of network lifetime, in conjunction with clustering architecture, which is widely adopted for scalability. Two types of radios, which have different property of energy(More)
In clustered wireless sensor networks, a numerous work for energy efficient routing has been conducted. These works are mainly focused on the decision of energy efficient routing between clusters. In this paper, we change a view of clustered network to a set of `cluster-rings'. A cluster-ring is the doughnut-shaped set of clusters which is placed roughly(More)
Energy efficiency is one of the most important issues of Wireless sensor networks (WSN) due to limited battery capacity. In sink-centric WSN (i.e., sensing data is collected by the sink node), this issue is particularly challenging due to the `funnel effect' which means high energy consumption of the nodes near the sink. While clustering can be used to(More)
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