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.
A fundamental problem when locating sensors in a network is to estimate the distance between pairs of sensors. Since security of sensor networks is vulnerable in the wireless environment, this paper proposes a secure ranging scheme which can provide secure position information for wireless sensor applications. By generalizing the asynchronous distance estimation technology (Distance Estimation via...
For target tracking applications, active ultrasonic sensors may suffer from inter-sensor-interference when these highly dense deployed sensors are not scheduled. In this paper, we propose a dynamic distributed sensor scheduling (DSS) scheme, where the tasking sensor is elected spontaneously from the sensors with pending sensing tasks in a distributed way via random competition by using Carrier Sense...
Underwater wireless sensor network is often constrained by limited power, limited communication range and high bit error rate (BER). We focus on designing a TDMA service for a cube-based underwater wireless sensor network. Such network is readily found in many applications in the area of monitoring, hazard detection, and so on. In this paper, we propose an underwater self-stabilizing TDMA algorithm...
This paper proposes a scheme for improvement of network lifetime and delay by employing a connected group of mobile cluster heads in a wireless sensor network (WSN). As data sensing is triggered by an event, the sensors relaying the aggregated data to the base station run out of energy at a much faster rate than sensors in other parts of the network. This gives rise to an unequal distribution of residual...
In this paper, we propose FCWQE, which is effective supporting continuous window query in wireless sensor networks. And it includes FCDC (Four-color with Delay Computation) approach to color the sensors, partition the logic aggregation groups and build the query-path. In order to save the energy and prolong the networks lifetime, this paper brings forward strategy to choose group leader nodes; at...
This paper addresses a scenario where a wireless sensor network (WSN) is used to implement a real-time relative positioning system. Its goal is to obtain relative coordinates of objects (the WSN nodes) in which the nodes are generally moving relatively to each other. To accomplish this, the distance among nodes is measured and its relative position is computed allowing the representation of their...
Wireless sensor networks (WSNs) deployed for mission-critical applications face the fundamental challenge of meeting stringent spatiotemporal performance requirements using nodes with limited sensing capacity. Although advance network planning and dense node deployment may initially achieve the required performance, they often fail to adapt to the unpredictability of physical reality. This paper explores...
In this paper, we present an energy efficient, scalable, and distributed node disjoint multipath routing algorithm for wireless sensor networks (WSNs). The proposed algorithm, the multipath energy-aware routing protocol (MERP), adjusts traffic flows via a novel load balancing scheme. The MERP has a higher average node energy efficiency, lower control overhead, and a shorter average delay than those...
This paper presents an integrated MAC and routing protocol called Delay Guaranteed Routing and MAC (DGRAM) for delay sensitive wireless sensor network (WSN) applications. DGRAM is a TDMA-based protocol designed to provide deterministic delay guarantee in an energy efficient manner. The design is based on slot reuse to reduce the latency of a node in accessing the medium, while ensuring contention...
We study the problem of decentralized sequential change detection with conditionally independent observations. The sensors form a star topology with a central node called fusion center as the hub. The sensors transmit a simple function of their observations in an analog fashion over a wireless Gaussian multiple access channel and operate under either a power constraint or an energy constraint. Simulations...
Expected growth in use and implementation of wireless sensor networks (WSNs) in different environments and for different applications creates new security challenges. In WSNs, a malicious node may initiate incorrect path information, change the contents of data packets, and even hijack one or more genuine network nodes. As the network reliability completely depends on individual nodespsila presence...
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.