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Securing code update is essential for military and health care applications. The functionalists of the sensor nodes in military and health monitoring region depend on their environmental conditions. The sensor nodes will be divided into different multi cast groups based on their location. For each multi cast group a different code update will be sent. We have developed a scheme for secure code update...
In wireless sensor networks securing code update is essential for many crucial military applications. The nodes deployed in border areas in the military region called the border sensor nodes are the more sensitive nodes. The border sensor nodes need to do some special tasks compared to other intermediate sensor nodes. So the code update to be sent to the border nodes will be different from the other...
Most of the sensor nodes are battery powered and energy utilization is one of the important criteria. At the same time Securing code update is very much essential for military, health care and environmental applications. But to send the code updates in a distributed, multihop sensor networks, most of the energy will be consumed in forwarding the packets to next hop sensor nodes. In order to avoid...
The design of new and more pervasive healthcare systems has been fostered by the increased expectancy of life in the coming years. In this field, distributed and networked wireless embedded systems, such as Wireless Sensor Networks (WSNs), suit well with the requirements of continuous monitoring of aged people for their own safety, without affecting their daily activities. WSN4QoL is a Marie Curie...
Contention based MAC protocols for wireless sensor networks (WSNs) suffer from the problem of false blocking of channel access due to unsuccessful attempts of RTS transmission by their neighboring nodes. This does not only reduce the network throughput, but also results in inconsistent and unpredictable data packet transmission pattern, which is unacceptable for real-time applications. A control mechanism...
In this paper, we propose a novel method of anomaly detection in wireless sensor networks (WSN) based on S Transform. It makes use of S transform for feature extraction. We extract only the significant components of the time-series data. Earlier wavelets based approach that extracts features from the time-series data has been applied for detecting anomalies in combination with various classifiers...
Wireless Sensor Network (WSN) has been regarded as a distinguished Ad Hoc Network that can be used for a specific application. Since a WSN consists of potentially hundreds of low cost, small size and battery powered sensor nodes, it has more potentials than others Ad Hoc networks to be deployed in many emerging areas. But they also raised many new challenges and these challenges include the design...
Wireless sensor networks (WSN) are an emerging technology based on the progress in digital electronics, micro-electromechanical systems and wireless communication science in the last decade. These advances have made possible the development of low power sensing devices with short range wireless communication capability at low cost. Business Week has stated that “microelectronic sensor networks is...
Cognitive radio (CR) has emerged as a solution to the problem of spectrum scarcity as it exploits the transmission opportunities in the under-utilized spectrum bands of primary users. Collaborative (or distributed) spectrum sensing has been shown to have various advantages in terms of spectrum utilization and robustness. The data fusion scheme is a key component of collaborative spectrum sensing....
A promising feature of emerging wireless sensor networks is the opportunity for each spatially-distributed node to measure its local state and transmit only information relevant to effective global decision-making. An equally important design objective, as a result of each node's finite power, is for measurement processing to satisfy explicit constraints on, or perhaps make selective use of, the distributed...
Recently, wireless mesh networks (WMNs) have drawn significant attention from academia and industry as a fast, easy, and inexpensive solution for broadband wireless access. In WMNs, many important applications, such as mobile TV and video/audio conferencing, require the support of multicast. In this paper, we address the issue of multicast cooperative communications over WMN. Specifically, we identify...
Equipped with recent advances in electronics and communication, wireless sensor networks gained a rapid development to provide reliable information with higher Quality of Service (QoS) at lower costs. This paper presents a realtime tracking system developed as a part of the ISSNIP BigNet Testbed project. Here a GPS receiver was used to acquire position information of mobile nodes and GSM technology...
This work proposes a genetic algorithm for designing a wireless sensor network based on complex network theory. We develop an heuristic approach based on genetic algorithms for finding a network configuration such that its communication structure presents complex network characteristics, e.g. a small value for the average shortest path length and high cluster coefficient. The work begins with the...
Many applications in wireless sensor networks can benefit from position information. However, existing accurate solutions for indoor environments are costly. RF based approaches are not suitable for some indoor environments such as factory floors where heavy machinery can cause interference. In this paper, we propose a low cost and simple location management system using the Wii remote controller...
Cluster based organization is widely used to achieve energy efficiency in Wireless Sensor Networks (WSN). In order to achieve confidentiality of the sensed data it is necessary to have secret key shared between a node and its cluster head. Key management is challenging as the cluster head changes in every round in cluster based organization. In this paper we are proposing and prototyping a scheme...
Wireless Sensor Networks (WSN) are resource constrained system. Efficient use of resources especially, energy is most important for their life extension. Clustering is a well known technique for achieving high scalability and efficient resource allocation in WSN. One of the fundamental issues in cluster based networks is to determine the optimal number of clusters with the objective of minimizing...
Recent advancement in wireless communications and electronics has enabled the development of low-cost & low power sensors networks. The sensor networks can be used for various application areas (e.g., health, military, home). Wireless Sensor Networks are autonomous devices forwarding locally collected data to a so-called sink node along multi-hop wireless paths. The main con-straint is the limited...
The capability of sensor nodes to collect ambient data makes environmental monitoring as one of the prime applications of wireless sensor networks. Mobile sink traverses an area of interest in collecting data. With the help of virtual infrastructure (VI), an area is divided into cluster. However, the nature of the structure causes various sizes of localized cluster; coarser as a cluster is farther...
Clustering is one of the most popular approaches used in wireless sensor networks to conserve energy and increase node as well as network lifetime. In this paper we have analyzed the affect of confinement of event field within the sensor field on network lifetime and network energy consumption for cluster-based wireless sensor networks based upon LEACH protocol which is among the most popular clustering...
For wireless sensor networks, how to efficiently utilize limited energy directly affects the lifetime and the cost. LEACH is a clustering-based protocol with good performance, which employs localized coordination to balance the energy usage. In this paper, an improved LEACH protocol is proposed with a more reasonable set-up phase. The proposed protocol focuses on saving the energy cost induced due...
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