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Wireless sensor networks are developed to be applied in hazardous or inaccessible places, where hundreds to thousands of sensor nodes are uniformly distributed for long-term data. It has been proved that, to maximize network lifetime, the best position for a sink is the center of the circular deployment area. However, the featured communication pattern, converge cast, brings unbalanced spatial distribution...
Abstract-For high-density networks, several studies have proposed field-based routing paradigms to uniformly distribute the traffic load throughout the network. However, as network density decreases, we observe major shortcomings of the current state-of-the-art: (i) fewer number of neighbors reduce the number of available paths and leads to path merging and (ii) the paths directed towards the border...
Wireless Sensor Network (WSN) is an emerging technology that shows great promise for various futuristic applications both for mass public and military. The sensing technology combined with processing power and wireless communication makes it lucrative for being exploited in abundance in future. The inclusion of wireless communication technology also incurs various types of security threats. Although...
Understanding the energy consumption of individual tasks in wireless sensor networks (WSN) is an important aspect for a network deployment. The fundamental task of WSNs is to gather data in the long-term manner. All additive processes such as routing and localization should not significantly affect the life time of the WSN. It was already proved that concurrent anchor free localization algorithms...
A method of obtaining a topology preserving map from virtual coordinates of a sensor network is presented. In a Virtual Coordinate System (VCS), a node is identified by a vector containing its distances, in hops, to a set of nodes called anchors. VCS is a higher dimensional abstraction of the connectivity map of nodes, with dimensionality defined by the number of anchors. Physical layout information...
In wireless sensor networks, with respect to a desired time deadline real-time data dissemination schemes achieve that by a spatiotemporal communication approach forwarding data from a source to a destination with a delivery speed. The delivery speed is typically obtained from both the static distance from the source to the destination and the interval of the time deadline. However, in case of real-time...
Wireless sensor networks offer a practical and economically viable alternative to manual data gathering in general and military scenarios, providing a means of surveillance of a region of terrain and providing warning of any threats. However, in hostile scenarios, the network is likely to come under attack from malicious entities which seek to compromise routing diversity in these environments. This...
We present the architecture, design, and preliminary evaluation of ACme, a wireless sensor and actuator network for monitoring AC energy usage and controlling AC devices in a large and diverse building environment. The ACme system consists of three tiers: the ACme node which provides a metering and control interface to a single outlet, a network fabric which allows this interface to be exported to...
This paper presents SHiMmer, a wireless platform for sensing and actuation that combines localized processing with energy harvesting to provide long-lived structural health monitoring. The life-cycle of the node is significantly extended by the use of super-capacitors for energy storage instead of batteries. During this period the node is expected to work completely maintenance-free. The node is capable...
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