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In this paper, we address the problem of allocating channels to wireless users in the multiuser-multichannel dynamic spectrum access (DSA) scenario. To solve this problem, we introduce a special form of multi-armed bandit (MAB), named exploration bandit, into DSA for the first time. Two distributed algorithms are proposed to maximize the channel rewards (e.g., transmission rates) of the users. Meanwhile,...
Wireless sensor networks (WSN) can be widely used in many areas, such as environment monitoring, weather forecasting, traffic control, etc. The wormhole attack problem is an important issue in WSN since it causes many problems, such as routing error, a reduction in sensor lifetime and broken network topology. Several wormhole detection approaches have been proposed, but most of them need special hardware...
Mobile sinks have been used recently, mainly to minimize energy consumption and to resolve some other issues including data collection from disconnected networks, energy depletion from sensor nodes which are close to the sink, etc. In this paper, we address the problem of finding an optimal path for the mobile sink to traverse through the sensing field, to collect a single packet from each sensor...
A common configuration used in area surveillance occurs when an area of interest is protected by deploying a number of concentric rings of sensor nodes around the area. When operating in a harsh environment, the nodes of the deployed Wireless Sensor Network (WSN) become subject to random failure. Consequently, the network becomes vulnerable to undetected unauthorized traversals to the area of interest...
The placement of relay nodes is one of the critical need of wireless sensor networks when connectivity, lifetime, fault tolerance like factors are desired in the network. In this study, we review the node placement techniques based on two broad categories, i.e. algorithm based and approximation based solutions and provide an overall view of this study by summarizing previous achievements. A taxonomy...
Wireless sensor networks (WSN) are used in many applications like environmental monitoring, infrastructure security, healthcare applications, and traffic control. It has been also proven recently that using Mobile Agent (MA) in wireless sensor networks (WSNs) can drastically help to obtain the flexibility of application-aware deployment. Middleware is software that provides a common platform for the...
Relay node placement is one of the critical need of wireless sensor networks when connectivity, lifetime, fault tolerance like factors are desired in the network. In this study, we review the present relay node placement techniques and provide an overall view of this study by summarizing previous achievements. We categorize the placement strategies into four broad categories, namely, approximation,...
Indoor positioning is an important application of wireless sensor network. In order to improve the localization accuracy and fulfill the real-time requirement of localization in the large area, we propose an indoor localization algorithm based on dynamic measurement compressive sensing for wireless sensor network. The algorithm first builds a potential area that possesses the independent features...
The recent research trends have shown that ACO based routing is a research topic of high interest in Wireless Sensor Networks (WSNs). The literature found survey articles on ACO based routing algorithms for WSNs concentrates only on the parameter considered and method employed for pheromone update and decay in the algorithm. Authors could not find much survey article which clearly explains the content...
Due to the difficult characterization of the propagation model, most studies on racking of mobile nodes assume the correct knowledge of the power-distance gradients or the path-loss exponents (PLEs). In this paper, we first investigate the impact of erroneous PLEs on positioning of a wireless nodes when both distance and bearing measurements are available. Thus, an analytical expression of the mean...
The routing information is hard to maintain and the energy is limited in highly dynamic wireless sensor network. To solve these problems, energy-saving geographic routing (ESGR) is proposed, which does not maintain the network topology and can save energy. A node broadcast its position information to its neighboring nodes before transmitting data. The neighboring nodes compute the position of the...
Implementation of WSN based on the proposed concept will simplify the process of recovery and scaling of network and improve network survivability due to the backup of important segments of distributed processor.
The wireless sensor network routing strategies determine the lifetime and the energy consumption of the sensor networks. An algorithm on calculating the approximate maximum network lifetime is presented by establishing the wireless sensor network routing strategy planning model. Through the simulation, the amount of information acquired during the network lifetime could account for 98.2% of the maximum...
Community structure is an important topological property of complex networks. Many algorithms have been developed to detect communities in the past, most of them focus on connectivity or attributes of vertices. In the latest ISNGC algorithm, both shared neighbors and connectivity between vertices have been considered. However, it is designed primarily for unweighted networks and has poor performance...
Wireless Sensor Network (WSN) consists of small nodes with sensing, computation, and communications capabilities. Sensor node senses the data and sends data to the base station for further processing. These sensor nodes mainly rely upon batteries for energy, which get drained at a quicker rate due to the computation and communication and this decreases the lifetime of the network. In order to solve...
This paper studies the energy allocation for sensing and data transmitting in communication systems with energy harvesting sensor nodes. The investigated system consists of a point-to-point data transmission between two energy harvesting nodes that have limited batteries capacity and communicating over a wireless fading channel. The transmitter aims to optimize the throughput over slotted system and...
Wireless sensor networks (WSN) is widely used for gathering data, and thus efficient routing is one of the key operations. Since each node of WSN is battery-powered, its lifetime is limited. To support energy-efficient routing for WSN, a novel routing algorithm is presented in this paper which decides the next hop using multiple criteria decision making (MCDM) technique. Here the hybrid virtual potential...
Nodes in a wireless sensor network (WSN) are susceptible to various attacks primarily due to their nature of deployment and unguarded communication. Therefore, providing security in such networks is of utmost importance. The main challenge to achieve this is to make the security solution light weight so that it is feasible to implement in such resource constrained nodes in WSN. So far, data authentication...
Wireless sensor networks have been recognized as promising tools to collect relevant, in-situ data for a wide range of application domains. However, such networks suffer from hard constraints including the allocated resources. Hence, current research endeavors strive to minimize the amount of data that has to be transmitted. This is typically achieved via data fusing or sending some nodes to sleep...
Recently, a class of online blind extraction algorithms in the framework of Kalman filtering have been developed for wireless sensor networks applications. But their performance is poor when additive noise is not neglectable. To address this issue, a new blind extraction method is proposed. This method novelly adopts two unscented Kalman filters alternately estimate the extraction vector and the source...
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