The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Localization with a small number of beacons is a challenging problem in wireless network. Traditional approaches commonly treat it as a nonlinear optimization problem which makes the computation very costly. In this paper, we propose a linear programming algorithm to address the problem. We formulate the nonlinear problem as a simple linear programming using linear approximation and our target is...
Without the applicable methods of forecasting the outbreak of debris flows in a wide area as well as long time, wireless sensor networks (WSN) of monitoring debris flow are essential for protecting safety and property of human. In nowadays, a common and key consideration of the network would be the energy efficiency, since both of the soil moisture (SM) sensor and the radio are power-hungry, meanwhile,...
E-healthcare systems of Wireless Body Area Network (WBAN) promise enormous change in future healthcare industry. The system generally consists of multiple sensor nodes that monitor various medical signals and deliver data to a network coordinator for further processing. One of the major issues of such systems is energy efficiency, owing to the limited power supply and difficult replacement of batteries...
Research on wireless sensor networks (WSNs) has been receiving a lot of attention recently. Because of the constraints on the cost of hardware, there are a lot of restrictions regarding memory, computational ability, and energy consumption, hampering WSN research. So far, many key establishment schemes have been proposed for WSNs. For the proposed schemes, random key predistribution is a practical...
In this paper, a low-cost and low-energy elliptic curves cryptography processor over GF(2m) based solution for security services such as key-distribution and authentication as required for wireless sensor networks was proposed. In order to obtain stronger cryptography as well as to minimize the energy and the cost, the architecture of coprocessor was optimized and implemented based on UMC 0.25μm CMOS...
As the Web contains rich and convenient information, Web search engine is increasingly becoming the dominant information retrieving approach. In order to rank the query results of web pages in an effective and efficient fashion, we propose a new page rank algorithm based on similarity measure from the vector space model, called SimRank, to score web pages. Firstly, we propose a new similarity measure...
Wireless sensor network node as the most important member of the whole network, has some specious characteristics such as small size, low-power consumption, limited capacity of storage and communication and so on, the node design is essential. This paper proposes a wireless sensor network nodes design scheme based on 51 core MPU and the CC2420 RF transceiver chip, introduces the design process of...
ZigBee is a low-rate control network communication protocols which designed for the wireless sensor networks with low power consumption, low cost, low complexity, safety and reliability characteristics, and thus have a broad market prospect. ZigBee PHY layer and MAC layer protocol used IEEE802.15.4. This paper analyses the function of MAC layer in IEEE 802.15.4, introduces the process of design and...
Energy-efficient node placement is one of the main design issues for linear structure wireless sensor networks. Two types of node placement schemes studied in the paper are to maximize the network lifetime and to balance the network reload. For a given number of nodes, study the optimal spacing; for a given node spacing, study the optimal density of nodes. Simulation shows, two types of node placement...
Emergency data which mean something happened in sudden need to be dealt with timely, otherwise will bring very serious consequences. To ensure the low-delay routing of emergency data, a novel graded routing strategy, dynamic adaptive cooperative routing (DACR) is proposed in this paper. This scheme extends the LEACH protocol to enable the multi-hop transmissions among clusters by incorporating a cooperative...
An enhanced ordered binary decision diagram (EOBDD) algorithm is proposed to evaluate the reliability of wireless sensor networks (WSNs), based on the considerations of the common cause failure (CCF) and a large number of nodes in WSNs. The EOBDD algorithm analyzes the common cause event (CCE) and the network structure when CCE takes place according to the stochastic graph and the CCF model of WSNs...
In order to improve energy efficiency, cluster reconstruction strategy based on energy prediction mechanism (CREP) has been proposed in the paper to solve the problem of frequent cluster reconfiguration in wireless sensor networks (WSN). Analyze energy consumption model of sensor nodes , construct the work state transition model, predict the remaining energy of its neighbor nodes and compare remaining...
The optimal number of cluster heads is an important parameter of wireless sensor network performance. Network nodes will consume more energy if the number of cluster heads is too much or too little. This paper focuses on novel calculation method for optimal number of cluster heads. Base on the analysis of LEACH energy dissipation model, novel calculation method is derived from the total energy dissipation...
In order to improve energy efficiency and balance network load in wireless sensor network, an uneven virtual grid-based clustering routing protocol (VGCR) is proposed. VGCR divides network region into different rings through the base station-assisted positioning. According to optimal number of cluster heads, the rings are divided into grids furthermore. Cluster heads election and cluster formation...
In order to improve communication reliability of power line carrier sensor network, a network topology dynamic discovery algorithm based on improved ant colony algorithm is proposed. The network topology discovery issue is changed into the minimum spanning tree of map by optimization strategy which based on antspsila election roads. Moreover, the idea of depth-first search is combined with to ensure...
UWB technology advances the lifetime of UWB-based wireless sensor networks (WSNs) and clustering enhances utilization of limited energy resources of the network.Since cluster heads (CHs) usually forward data via multi-hop, energy consumed by each CH vary with relay traffic and its member size. To achieve energy balance, an overall energy efficient clustering (OEEC) algorithm is proposed. It elects...
A number of faulty sensors would lead to inaccuracy of event region detection and deterioration of network quality of service in wireless sensor networks. This paper proposed a distributed weighted fault-tolerant algorithm (DWFA) for nodes regular deployment and an optimal fault-tolerant mechanism based on weighted distance (WDOFM) for nodes irregular deployment. Both of them exploit spatial correlations...
Based on heterogeneous and redundancy, SEA (Sleep-scheduling & Energy-efficient Algorithm) was brought forward in wireless sensor network. When the node runs for cluster-head, the node with different energy would have different probability. At the same time Sleep-scheduling was imported after the node was divided in cluster. SEA not only could better handle the heterogeneous energy capacities...
In this paper, we propose a novel distributed weighting fault-tolerant algorithm for event region detection in wireless sensor networks. Considering the fault-tolerant range of ldquoneighborhoodpsilas neighborhoodrdquo, we first employ neighborhood nodes to exchange information with its surrounding nodes and estimate the status value of neighborhood nodes, and then weight and synthesize the estimating...
Inspired by the idea of network coding, we propose a cascading data collection (CDC) mechanism to reliably gather sensor data without any structural information. In order to send data back to the sink in the CDC mechanism, sensor nodes wait cascadingly based on their hops to the sink. The intermediate node stores the innovative received data from its farther neighboring nodes and sends out a packet...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.