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This article analyzes the hop-distance relationship in a shadow fading environment. Assuming the sensor nodes are randomly deployed in a circular region according to a planar Poisson process, we present the close relationship between the hop counts and their geographic distance. An improved localization algorithm based on the hop-distance relationship, called ILA_HDR, has been proposed. The ILA_HDR...
Wireless sensor network is the core support technology in the framework of the Internet of Things. Environmental monitoring and devices control of intelligent building based on wireless sensor network is considered as one of the most crucial applications. It can perceive several environmental parameters and feedback control information to devices to provide more comfortable environment for people...
Target tracking, which has been applied popularly in military and civil aspects, is one of the important applications in wireless sensor network. In this paper, we propose a new kind of target tracking system based on camera sensor networks considering the tracking accuracy as the key performance metric. The designed tracking system is composed of four basic components: Object Detection, Neighbor...
Power control technology in wireless sensor network (WSN) is of great significance to ensure the network coverage, reduce the power consumption of the nodes, and optimize network performance. In this paper, a new power control based on routing protocol (PCBRP) in the MAC layer is proposed. It operates with the help of routing protocol and calculates optimal transmission power according to the distance...
Mobile sensor network (MSN) is a kind of wireless sensor networks(WSNs) in which nodes can move under their own control or under the control of the environment. In this paper we develop a new mobile sensor node that supports IPv6 technology, which enables WSN to easily connect to Internet. Furthermore, we propose a dynamic path planing for mobile node's moving and mobility control mechanism. Mobile...
Energy efficiency in wireless sensor networks is one of the most crucial technologies. In this paper, we propose a simple and feasible synchronous sleep and wake mechanisms for wireless sensor networks in a small scale. Sensor nodes are divided into forwarding nodes and listening nodes. Beacon frame containing sleep command from coordinator can be forwarded to listening nodes by forwarding nodes....
Position information is of vital importance in the various applications in wireless sensor networks (WSNs). We analyze the features of localization methods considering both precision and energy consumption and propose the idea of hybrid localization system (HLS). HLS is composed of coarse-grained localization system (CGLS) and fine-grained localization system (FGLS). CGLS takes the wireless signal...
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