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In this paper, we aim to maximize users' satisfaction by deploying limited number of relays in a target region to form a wireless relay network, and define the Deployment of Cooperative Relay (DoCR) problem, which is proved to be NP-complete. We first propose an O(δ log n) approximation algorithm that utilizes the algorithms for budget weighted Steiner tree problem with novel position weighting assignment...
Tree-based routing structures are widely used to gather data in wireless sensor networks. Along with tree structures, in-network aggregation is adopted to reduce transmissions, to save energy and to prolong the network lifetime. Most existing works that focus on the lifetime optimization for data aggregation do not take the link quality into consideration. In this paper, we study the problem of Maximizing...
Camera sensors can collect visual information from regions of interest (RoI) and provide more information to classify the intruder. In practice, randomly deployed camera sensors can not guarantee that the barrier is full-view covered, and lead to a waste of sensing resources. Our work takes the first attempt to explore the deployment strategy to achieve full-view barrier coverage with rotatable camera...
Data center networks are becoming increasingly important for computing industry. By exploiting millimeter wavelength wireless technology (e.g., 60GHz), data centers are going to be more convenient for the interconnection of different components without complex wiring. 60GHz technique has been widely studied, and great progress has been achieved indeed. However, there are two significant challenges...
As the wireless technology overwhelmingly occupies the consumer electronics market, the booming demands of the mobile users are largely unaccommodated. Thus wireless data broadcasting systems gain increasing attentions recently. Two wellknown metrics for evaluating wireless data broadcasting systems are Access Latency and Tuning Time. In order to reduce these two factors, many existing techniques...
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