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Self-protection in WSN (wireless sensor networks) has not been deeply studied because WSN has a high rate of failure. The major concern in WSN is to maximize the networkpsilas lifetime. In this work we propose and evaluate a WSN architecture consisting of nodes grouped in cell arrays. Sensors located in arrays of directional antennas may apply strategies of self-configuration and some mechanisms to...
This paper presents the PAIS system which is an innovative WSN (wireless sensor network) for the environmental monitoring. The main goal of the PAIS system is to reduce the wildfire damages with early detection and suppression. Moreover, each PAIS node can integrate a number of heterogeneous sensors in order to operate a complete environmental monitoring. Usually the sensor nodes are located in wild...
Most of wireless sensor networks (WSN) research topics consider how to save the energy of the sensor nodes. However, in some applications of WSN, such as in the monitoring of an earthquake or forest wildfire, transmitting emergency data packets to the sink node as soon as possible is much more important than saving power. In this paper, we propose a Priority-based Hybrid Protocol (PHP) WSN model to...
TDMA has been proposed as a MAC protocol for wireless sensor networks (WSNs) due to its efficiency in high WSN load. However, TDMA is plagued with shortcomings; we present modifications to TDMA that will allow for the same efficiency of TDMA, while allowing the network to conserve energy during times of low load (when there is no activity being detected). Recognizing that aggregation plays an essential...
To save their energy, sensors spent most of their life in sleeping mode waking up for short intervals to achieve any required tasks. While performing their sensing and communicational obligations to the network and due to the random nature of sleep and awake cycles, sensors are usually assigned different workloads which in turn consume their energy unevenly. Eventually, the energy of those heavily...
Wireless sensor networks (WSNs) have recently emerged as a key sensing technology with diverse civilian and military applications. In these networks, a large number of small sensors or nodes perform distributed sensing of a target field. Each node is capable of sensing events of interest within its sensing range and communicating with neighboring nodes. The target field is said to be k-covered if...
Faults in WSN are very common and appear in different levels of the system. For pervasive applications to be adopted by end-users there is a need for autonomic self-healing. This paper discusses our initial approach to self-healing in WSN and describes experiments with two case studies of body sensor deployment. We evaluate the impact of sensor faults on activity and gesture classification accuracy...
Wireless sensor networks (WSN) consist of large numbers of sensor nodes embedded in physical space for continuously sensing/monitoring a specified physical phenomenon. Typically, WSN requires spatially dense sensor deployment to satisfactorily respond to the requirements of the application. The spatial proximity of nodes and the temporal behaviour of the sensing operation causes the observations sensed...
Born as data networks for personal areas (WPAN), wireless sensor networks (WSN) have rapidly gained a growing importance in many other contexts. One of the most interesting and innovative field of application of WSN is represented by the planetary exploration context; taking into account the actual scopes of NASA and ESA, the aim of this paper is to present the performance evaluation of an IEEE802...
Wireless sensor networks (WSNs) research has pre-dominantly assumed the use of a portable and limited energy source, viz. batteries, to power sensors. Without energy, a sensor is essentially useless and cannot contribute to the utility of the network as a whole. Consequently, substantial research efforts have been spent on designing energy-efficient networking protocols to maximize the lifetime of...
A biomedical signals monitoring system with multiple physiological signs measurement capability in real time is designed and implemented. This system performs a local vital sign data analysis using cell phone over wireless sensor network (WSN) technology and code division multiple access (CDMA) network. Cell phone-based personal medical recorder becomes popular to facilitate self-control of chronic...
In the application of wireless sensor networks (WSN), the balance of energy consumption plays an important role in extending the life cycle of WSN. Aim at energy consumption of Wireless sensors network, a dynamic cluster-based routing protocol based on the greedy algorithm (GDCRP). In the protocol, nodes run for the cluster head according to the energy and location. The elected cluster head has optimal...
In this paper, we study the problem of constructing full-coverage three dimensional networks with multiple connectivity. We design a set of patterns for full coverage and two representative connectivity requirements, i.e. 14- and 6-connectivity. We prove their optimality under any ratio of the communication range over the sensing range among regular lattice deployment patterns. We also conduct a study...
Wireless sensor networks (WSNs) have received more and more attention on the object tracking system, but the performance of active routing is low. In this paper,we present an novel energy efficient dynamic target tracking (EE-DTT) protocol for wireless sensor network, EE-DTT has three obvious features: firstly, it improves virtual grid ideas to divide each cluster into MtimesN square area and select...
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...
In clustering wireless sensor networks, cluster-head nodes are backbone network to process and transmit data. Vast intra-cluster nodes obtain sleep, reduce data delay, lighten cluster head burden. In this paper, we derived the smallest active node number K, and achieved a new intra-cluster active nodes scheduling algorithm. The experimental results show that the result of the algorithm in saving energy...
Wireless sensor network (WSNs) offers great promise for information capture and processing for different application, which inherits military applications excessively. Military is using this concept rigorously for their advancement in warfare and field. This work is compilation of some recent work of ldquomilitary application using WSNrdquo.
In wireless sensor networks (WSNs), boolean sensing model are popularly adopted for coverage analysis since analytical and asymptotic analysis carried with this model are simple and tractable. As the boolean sensing model assumes, however, it is unlikely that sensing capability of sensor drop abruptly from perfect detection capability to zero. Hence, sensing capability characterization in such boolean...
In many WSN (wireless sensor network) applications, such as [1], [2], [3], the targets are to provide long-term monitoring of environments. In such applications, energy is a primary concern because sensor nodes have to regularly report data to the sink and need to continuously work for a very long time so that users may periodically request a rough overview of the monitored environment. On the other...
Wireless sensor network (WSN) is a distributed system which possesses time varying wireless connectivity without any infrastructural backbone. Scarce energy and computation power of individual nodes, unattended and harsh operation environment, self configuration after random deployment etc complexities are known characteristic features of a WSN. Despite aforesaid constraints WSN has been evolved as...
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