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We study scalable routing for a sensor network deployed in complicated 3D settings such as underground tunnels in gas system or water system. The nodes are in general 3D space but they are very sparsely located and the network has complex topology. We propose a routing scheme by first embdding the network on a surface with possibly non-zero genus. Then we compute a canonical hyperbolic metric of the...
Advances in wireless communication and microelectronic devices technologies have achieved the success production of low-power micro-sensors, enabling the large scale deployment of wireless sensor networks (WSNs). In order to track objects energy efficiently in OTSNs, many methods have been proposed but the performance is still not satisfactory. In fact, improving the performance of flooding is necessary...
Secret Vector which has characteristics of smart bulk, high-capacity and portable depends on human management mainly. In case of lacking identity authentication, the vector - with weak self-protect capability - will be liable to go out of control. Thereby, the current secret vector can hardly satisfy the need of monitoring vector in all aspects. Based on analysis of the characteristics of wireless...
We present a localization system based on phase measurement for wireless sensor networks. The system features at least 3 anchor nodes with known locations. The anchor nodes broadcast synchronized reference signal to the location-unknown user nodes. The user nodes measure relative phase offset of reference signals from different anchors, and the relative phase offset indicates relative distance offset...
This article puts forward a method to access the data and analyzed results from the monitoring system of environment based on WSN with the B/S mode. It resolves the problem of low speed of page refresh with Ajax. The experiment shows that the partial refresh feature of Ajax can make it possible for the users to get access to the data and analyzed results easily through the browser, and experience...
This paper presents a design of wireless network system based on Zigbee for monitoring the formaldehyde level. The system consists of coordinator, router and sensor nodes, in which signals are mainly controlled, transmitted and received by Chipcon's leading SoC chip CC2430. The communication in the network is realized by Texas Instruments' Z-stack, which is compatible with Zigbee specification. Compared...
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