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Underwater wireless sensor networks (UWSNs) can provide a promising solution to underwater target tracking. However, due to the limited energy and bandwidth resources of UWSNs, only a small part of nodes are allowed to track underwater target at each time step. As far as we know, almost all the existing node selection schemes assume the communication channel between a node and the fusion center is...
Compressive sensing (CS) is a promising data acquisition and compression technology that can be used to reduce and balance the transmission cost in wireless sensor networks (WSNs). However, the transmission links are unreliable frequently and data loss is very common in wireless sensor networks. What's more, the reconstruction accuracy is reduced greatly due to unreliable links and data loss. In order...
Dictionary learning algorithm facilitates a sparse representation of a given set of training signals, which has significant impact on signal reconstruction error in compressive sensing. To reduce the recovery error caused by environmental noise, in this paper, a novel structured dictionary learning method for sparse signal representation is presented. The training signals are collected from compressive...
In the range-based localization systems of Wireless Sensor Networks, the existence of the distance outliers will severely decrease the localization accuracy. In order to eliminate distance outliers efficiently, an outlier detection model is constructed based on the geometric constrains of the Cayley-Menger determinant and l1 minimization decoding algorithm. Since not all the outliers can be detected...
Since underwater nodes provide measurements for target tracking based on underwater wireless sensor networks (UWSNs), target-node geometry (T-NG) may affect the performance of target tracking. This paper studies T-NG effect on target tracking in UWSNs using quantized measurements. In order to evaluate the arbitrary T-NG, the relation between posterior Cramer-Rao lower bound (PCRLB) and node's position...
Node localization is one of the important issues in wireless sensor networks. In order to lower the cost of a sensor network and improve localization accuracy and efficiency, we put forward a virtual cluster based mobile beacon aided localization algorithm (VCMBLA) in this paper. A multi-hop distance estimation method based on neighbor distribution (MDEND) is presented and a path planning strategy...
The wireless sensor network is developed in this paper to test and control the temperature and humidity of the barn. Specific procedures are after processing the variable information which is gathered by the humidity and temperature sensor, By using Zigbee agreement we will transfer the packets with wireless data transmission among all these nodes and then send it into PC. It will show the temperature...
Aiming at the requirement for monitoring and controlling information in Smart Grid, the applications of ZigBee technology for Smart Grid were analyzed. After ZigBee technology and its features for Smart Grid were introduced, the prospects of ZigBee applications for Smart Grid were discussed in the cases of ZigBee applications in Smart Grid HAN, fault locating and UHV transmission lines monitoring...
This paper mainly studies the application of synchronous lifting technology in the bridge lifting. The wireless sensor network is installed in the bridge to serve as low-cost alternatives to commercially available cable-based measuring and monitoring systems. Due to the unavoidable sensing noises and the uncertain perturbations in the hydraulic systems, Kalman filter is adopted to reduce the measuring...
Dynamic event region detection is an important application of wireless sensor networks. The position of event region should be transmitted to the base station in good time. A routing scheme based on gradient field and cluster is advised to track dynamic event region. The gradient field is set up after sensors are deployed. Only the event sensors are organized into clusters and then the cluster heads...
While the wireless endoscopic capsule examining human's large gastrointestinal (GI) cavity, such as stomach and large intestine, many interested spots are omitted by only one or two cameras due to its limited field of view. This paper proposes the new system architecture of the Micro-Ball for medical endoscopy application. Six cameras are embedded in the Micro-Ball for multiple fields of view, which...
This paper considers a circular high-density WSNs, which is divided into several homogeneous sectors. For a sector, the route nodes transmit data to base station (BS) along the sides of the sector and the radio of nodes can cover all areas of target area. The paper presents an energy-balance solution to balance the energy consumption, by adjusting transmission range with quality coverage under a FSCTA...
A major problem for many sensor network applications is determining the most efficient way of conserving the energy of the power source. Energy conservation is of prime importance for sensor networks. In this paper, a power saving hierarchical routing protocol PER is proposed for heterogeneous sensor network, optimized via cross-layer designs to save sensor's power. There are two kinds of nodes in...
Low energy assumption is one of design challenges for data transmission in sensor networks. In this paper, we firstly compare the total energy consumption rates of direct transmission protocol, hop-by-hop transmission protocol; direct-hop transmission protocol and energy-balanced transmission (EBT) approach by simulations, and identify the drawbacks of the above protocols respectively. Then a scheme...
This paper considers a cluster-based WSNs, which is partitioned into a number of voronoi cells. For a voronoi cell, the paper presents an energy-balance transmission approach to balance the energy dissipation, by adjusting the ratio of data transmitted to the next hop and the cluster head directly. Simulations show that the network lifetime by this transmission approach extends about 1.5 times of...
Low energy assumption is one of design challenges for data transmission for sensor network. In this paper, we firstly compare the total energy consumption rates of direct transmission protocol, hop-by-hop transmission protocol, direct-hop transmission protocol and energy-balanced transmission (EBT) approach by simulations, and identify the drawbacks of the above protocols respectively. Then a scheme...
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