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Hindawi Publishing
(1830 results)-
Whitepapers
A State-Based Modeling Approach for Efficient Performance Evaluation of Embedded System Architectures at Transaction Level
November 20, 2011, 12:00am PST
Abstract models are necessary to assist system architects in the evaluation process of hardware/software architectures and to cope with the still increasing complexity of embedded systems....
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Whitepapers
Ranging Performance of the IEEE 802.15.4a UWB Standard Under FCC/CEPT Regulations
January 29, 2012, 12:00am PST
The IEEE 802.15.4a standard for wireless sensor networks is designed for high-accuracy ranging using Ultra-WideBand (UWB) signals. It supports coherent and non-coherent (energy detector)...
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Whitepapers
Efficient Dual Domain Decoding of Linear Block Codes Using Genetic Algorithms
January 12, 2012, 12:00am PST
A computationally efficient algorithm for decoding block codes is developed using a Genetic Algorithm (GA). The proposed algorithm uses the dual code in contrast to the existing genetic decoders...
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Whitepapers
Transmission Network Expansion Planning Considering Phase-Shifter Transformers
January 16, 2012, 12:00am PST
This paper presents a novel mathematical model for the transmission network expansion planning problem. Main idea is to consider Phase-Shifter (PS) transformers as a new element of the...
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Whitepapers
Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers
October 31, 2011, 12:00am PDT
In modern wideband communication receivers, the large input-signal dynamics is a fundamental problem. Unintentional signal clipping occurs, if the receiver front-end with the analog-to-digital...
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Whitepapers
Analysis and Mitigation of the Narrowband Interference Impact on IR-UWB Communication Systems
December 13, 2011, 12:00am PST
The impact of narrowband interference signals on impulse radio Ultra-WideBand (UWB) communication system has been investigated. A closed form expression for the bit error rate performance of UWB...
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Whitepapers
On Particle Swarm Optimization for MIMO Channel Estimation
December 14, 2011, 12:00am PST
Multiple-Input Multiple-Output (MIMO) transmission is considered as a key technology to reach the challenging goals of upcoming wireless standards, such as Long-Term Evolution Advanced (LTE-A). A...
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Whitepapers
An Enhanced Genetic Algorithm to Solve the Static and Multistage Transmission Network Expansion Planning
November 18, 2011, 12:00am PST
An Enhanced Genetic Algorithm (EGA) is applied to solve the Long-Term Transmission Expansion Planning (LTTEP) problem. The following characteristics of the proposed EGA to solve the static and...
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Whitepapers
A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO Communications
November 17, 2011, 12:00am PST
Multiple-Input Multiple-Output (MIMO) techniques in combination with high constellation orders have been identified as a promising approach to high spectral efficiency systems. Prominent detection...
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Whitepapers
Intelligent On/Off Dynamic Link Management for On-Chip Networks
December 3, 2011, 12:00am PST
Networks-on-Chips (NoCs) provide scalable on-chip communication and are expected to be the dominant interconnection architectures in multi-core and many-core systems. Power consumption, however,...
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Whitepapers
A Buffer-Sizing Algorithm for Network-on-Chips with Multiple Voltage-Frequency Islands
November 1, 2011, 12:00am PDT
Buffers in on-chip networks constitute a significant proportion of the power consumption and area of the interconnection, and hence reducing them is an important problem. Application-specific...
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Whitepapers
Status Data and Communication Aspects in Dynamically Clustered Network-on-Chip Monitoring
November 1, 2011, 12:00am PDT
Monitoring and diagnostic systems are required in modern Network-on-Chip implementations to assure high performance and reliability. A dynamically clustered NoC monitoring structure for traffic...
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Whitepapers
Multicriteria Reconfiguration of Distribution Network with Distributed Generation
November 7, 2011, 12:00am PST
The paper addresses the problem of multi-criteria reconfiguration of distribution network with distributed generation according to the criterion of minimum power loss under normal conditions and...
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Whitepapers
CP-Based SBHT-RLS Algorithms for Tracking Channel Estimates in Multicarrier Modulation Systems
October 3, 2011, 12:00am PDT
Cyclic Prefix (CP) in multicarrier modulation systems has been considered as an alternative to the training sequences to track channel estimates. In this paper, two new algorithms are developed...
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Whitepapers
Developing a Fuzzy Logic Based on Demand Multicast Routing Protocol
October 10, 2011, 12:00am PDT
A Mobile Ad hoc NETwork (MANET) is formed by wireless mobile nodes which dynamically set up themselves to initiate and maintain a wireless network without any predefined infrastructure. For...
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Whitepapers
Probabilistic Behavior Analysis of MIMO Fading Channels Under Geometric Mean Decomposition
September 22, 2011, 12:00am PDT
Geometric Mean Decomposition (GMD) has been proposed as a method to realize multiple spatial links with identical gains that are intrinsic to a MIMO channel. In order to simplify system design and...
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Whitepapers
Reliability Evaluation of Distribution Power Systems Based on Artificial Neural Network Techniques
August 25, 2011, 12:00am PDT
In order to assess the reliability of distribution systems, more and more researchers are directing their attention to the artificial intelligent method, and several reliability indices have been...
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Whitepapers
A Hardware Design of Neuromolecular Network with Enhanced Evolvability: A Bioinspired Approach
August 30, 2011, 12:00am PDT
Silicon-based computer systems have powerful computational capability. However, they are easy to malfunction because of a slight program error. Organisms have better adaptability than computer...
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Whitepapers
Networks on Chips: Structure and Design Methodologies
October 1, 2011, 12:00am PDT
The next generation of MultiProcessor System on Chip (MPSoC) and Chip MultiProcessors (CMPs) will contain hundreds or thousands of cores. Such a many-core system requires high-performance...
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Whitepapers
Self-Calibrated Energy-Efficient and Reliable Channels for On-Chip Interconnection Networks
August 17, 2011, 12:00am PDT
Energy-efficient and reliable channels are provided for On-Chip Interconnection Networks (OCINs) using a self-calibrated voltage scaling technique with Self-Corrected Green (SCG) coding scheme....
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Whitepapers
Characterization of Hardware Impairments in Multiple Antenna Systems for DoA Estimation
September 12, 2011, 12:00am PDT
The authors consider the effects introduced by hardware impairments on the estimation of the Direction of Arrival (DoA) deploying a multiple antenna radio system. They derive a system model from...
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Whitepapers
An (m, K)-Firm Real-Time Aware Fault-Tolerant Mechanism in Wireless Sensor Networks
September 24, 2012, 12:00am PDT
In this paper, the authors propose an (m, k)-firm-based real-time fault-tolerant mechanism, which helps routing mechanisms to achieve specific QoS requirement by employing a Local Status Indicator...
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Whitepapers
MDS-Based Wormhole Detection Using Local Topology in Wireless Sensor Networks
January 27, 2012, 12:00am PST
Wormhole attack is a severe threat to Wireless Sensor Networks (WSNs), which has received considerable attentions in the literature. In this paper, the authors attempt to relax the limitations in...
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Whitepapers
Efficient Data Dissemination in Urban VANETs: Parked Vehicles are Natural Infrastructures
December 3, 2012, 12:00am PST
Data dissemination is the fundamental operation in Vehicular Ad hoc NETworks (VANETs); for example, after an accident or congestion is detected by the corresponding sensors mounted on the...
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Whitepapers
An Energy-Efficient Distributed Algorithm for Virtual Backbone Construction with Cellular Structure in WSN
December 4, 2012, 12:00am PST
The construction of virtual backbone within Wireless Sensor Network (WSN) is an important means to reduce the redundant transmission and conserve limited energy resources. However, if there is not...
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Whitepapers
Latency Estimation-Based Data Delivery Scheme for Vehicular Ad Hoc Networks
December 5, 2012, 12:00am PST
Data delivery is the most compelling issue for the applications in vehicular ad hoc networks. The characteristics of VAENTs such as highly dynamic topology and the road-constrained mobility pose...
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Whitepapers
An Adaptive Opportunistic Network Coding Mechanism in Wireless Multimedia Sensor Networks
November 21, 2012, 12:00am PST
The network coding technique is promising for improving the performance of video communication in wireless multimedia sensor networks. The authors propose an Adaptive Opportunistic Network Coding...
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Whitepapers
A Survey of Localization in Wireless Sensor Network
November 16, 2012, 12:00am PST
Localization is one of the key techniques in wireless sensor network. The location estimation methods can be classified into target/source localization and node self-localization. In target...
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Whitepapers
Energy-Model-Based Optimal Communication Systems Design for Wireless Sensor Networks
October 3, 2012, 12:00am PDT
With the rapid development of wireless communication and low-power-embedded techniques, Wireless Sensor Networks (WSNs) are widely used in many industrial and civilian application areas, including...
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Whitepapers
Distributed Intrusion Detection of Byzantine Attacks in Wireless Networks with Random Linear Network Coding
November 27, 2012, 12:00am PST
Network Coding (NC) can be applied to achieve the maximal information flow in a network. In energy-constraint wireless networks such as wireless sensor networks, applying NC can further reduce the...
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Whitepapers
An Effective Find and Replicate Strategy for Data Communication in Intermittently Connected Wireless Ad Hoc and Sensor Networks
October 24, 2012, 12:00am PDT
ICWASNs are a kind of wireless networks where, due to mobility of nodes and lack of connectivity, there may be frequent disconnections among the nodes. Hence, the routing path from the source to...
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Whitepapers
Improved LEACH Routing Communication Protocol for a Wireless Sensor Network
November 19, 2012, 12:00am PST
A WSN (Wireless Sensor Network) consists of thousands of sensor nodes with limited energy, memory, and computation capability. The classical hierarchical protocols such as LEACH and LEACH-C have...
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Whitepapers
Interference-Aware Fault-Tolerant Energy Spanner in Wireless Ad Hoc Networks
November 21, 2012, 12:00am PST
Ad hoc networks are formed by autonomous nodes communicating via radio without any additional backbone infrastructure. Ad hoc networks have received significant attention in recent years due to...
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Whitepapers
Energy- and Cognitive-Radio-Aware Routing in Cognitive Radio Sensor Networks
November 7, 2012, 12:00am PST
Cognitive Radio Sensor Networks (CRSNs) are the next generation Wireless Sensor Networks (WSNs) that mitigate overcrowded unlicensed spectrum bands by opportunistically using temporally unoccupied...
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Whitepapers
Optimal Adaptive Antijamming in Wireless Sensor Networks
November 8, 2012, 12:00am PST
Wireless sensor networks have been widely applied to various application domains such as environmental monitoring and surveillance. This paper proposes an adaptive approach to antijamming for...
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Whitepapers
Public-Transportation-Assisted Data Delivery Scheme in Vehicular Delay Tolerant Networks
November 12, 2012, 12:00am PST
As an important component of transportation system, public transportation accounts for a considerable proportion in the whole traffic flow. In this paper, the authors firstly present a...
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Whitepapers
A Minimax Unbiased Estimation Fusion in Distributed Multisensor Localization and Tracking
October 26, 2012, 12:00am PDT
A minimax estimation fusion in distributed multi-sensor systems is proposed, which aims to minimize the worst-case squared estimation error when the cross-covariances between local sensors are...
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Whitepapers
Intelligent Monitoring of Multistory Buildings Under Unknown Earthquake Excitation by a Wireless Sensor Network
October 8, 2012, 12:00am PDT
It is necessary to investigate techniques for monitoring structures under unknown earthquakes. For this purpose, an algorithm is proposed in this paper for the identification of structures and...
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Whitepapers
Ant-Based Transmission Range Assignment Scheme for Energy Hole Problem in Wireless Sensor Networks
October 9, 2012, 12:00am PDT
The authors investigate the problem of uneven energy consumption in large-scale many-to-one sensor networks (modeled as concentric coronas) with constant data reporting, which is known as an...
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Whitepapers
Challenges for Coexistence of Machine to Machine and Human to Human Applications in Mobile Network: Concept of Smart Mobility Management
August 13, 2012, 12:00am PDT
A key factor for the evolution of the mobile networks towards 4G is to bring to fruition high bandwidth per mobile node. Eventually, due to the advent of a new class of applications, namely,...
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Whitepapers
A Mutual Algorithm for Optimizing Distributed Source Coding in Wireless Sensor Networks
November 16, 2011, 12:00am PST
Wireless Sensor Networks (WSNs) are composed of small wireless nodes equipped with sensors, a processor, and a radio communication unit, all normally powered by batteries. In this paper, the...
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Whitepapers
An Experimental Study of WSN Power Efficiency: MICAz Networks with XMesh
October 20, 2011, 12:00am PDT
This is an investigation of Wireless Sensor Networks (WSNs) using Memsic's XMesh routing protocol on MICAz wireless motes. It focuses on the study of the practical aspects of WSNs' power...
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Whitepapers
A Distributed Algorithm for Virtual Backbone Construction with Cellular Structure in WSNs
November 24, 2011, 12:00am PST
The normal node in Wireless Sensor Networks (WSNs) often has no constant energy supply. To make efficient use of limited energy resources significant, a major way to save limited energy resources...
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Whitepapers
Error-Tolerant and Energy-Efficient Coverage Control Based on Biological Attractor Selection Model in Wireless Sensor Networks
November 10, 2011, 12:00am PST
A coverage problem is one of the important issues to prolong the lifetime of a wireless sensor network while guaranteeing that the target region is monitored by a sufficient number of active...
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Whitepapers
A Dynamic Traffic-Aware Duty Cycle Adjustment MAC Protocol for Energy Conserving in Wireless Sensor Networks
November 9, 2011, 12:00am PST
Wireless sensors are battery-limited sensing and computing devices. In this paper, a dynamic traffic-aware MAC protocol for energy conserving in wireless sensor networks is proposed. The proposed...
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Whitepapers
Wireless Link-Quality Estimation in Smart Grid Environments
December 22, 2011, 12:00am PST
In this paper, the performance of the state-of-the-art link-quality estimation methods is investigated for different smart power grid environments, such as outdoor substation, underground network...
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Whitepapers
A Lightweight Lap Time Measurement System for Alpine Ski Sport Using a TDMA-Based Linear Wireless Sensor Network
November 9, 2011, 12:00am PST
In this paper, the authors proposed a practical TDMA-based WSN protocol named LSNP that is dedicated to a class of sensor network application fields where nodes are placed in a linear fashion in a...
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Whitepapers
The Effects of Motion on Distributed Detection in Mobile Ad Hoc Sensor Networks
November 4, 2011, 12:00am PDT
In this paper, the authors consider a set of mobile wireless sensors that collect observations about a brief, localized event. As they continue to move about, one of them processes its...
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Whitepapers
Reliable Latency-Aware Routing for Clustered WSNs
January 2, 2012, 12:00am PST
Wireless Sensor Networks (WSNs) are persistently evolving from merely a notion of microelectronics to a new realm of practical applications. Certain critical applications like disaster management,...
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Whitepapers
Grid-Based Predictive Geographical Routing for Inter-Vehicle Communication in Urban Areas
January 2, 2012, 12:00am PST
Vehicular Ad-hoc NETworks (VANETs) are highly mobile wireless ad hoc networks for vehicular safety and other commercial applications, whereby vehicles move non-randomly along roads while...
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Whitepapers
A Novel Centroid Localization for Wireless Sensor Networks
November 23, 2011, 12:00am PST
Self-localization of sensor nodes is one of the key issues in wireless sensor networks. Based on the analysis of traditional range-free algorithms such as centroid and APIT (Approximate Perfect...
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Whitepapers
An Unbound Network Coding for Extended IEEE 802.16j Multihop Relay Network
November 21, 2011, 12:00am PST
In this paper, the authors propose a network coding-based relay scheme for multi-hop relay networks, called NC-BR. It allows RSs to combine two wireless backhaul transmissions into one using the...
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Whitepapers
One-Time Broadcast Encryption Schemes in Distributed Sensor Networks
December 10, 2011, 12:00am PST
Broadcasting is a message-transferring method characteristic for majority of sensor networks. Broadcast Encryption (BE) is broadcasting encrypted messages in such a way that only legitimate nodes...
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Whitepapers
DI-GEP: A New Lifetime Extending Algorithm for Target Tracking in Wireless Sensor Networks
January 4, 2012, 12:00am PST
Wireless Sensor Networks (WSNs) are widely used in detecting, locating, and tracking moving objects. The cheap, low-powered, and energy-limited sensors that are set up in large areas may consume...
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Whitepapers
Subjective Quality Assessment of H.264/AVC Video Streaming With Packet Losses
January 18, 2011, 12:00am PST
Research in the field of video quality assessment relies on the availability of subjective scores, collected by means of experiments in which groups of people are asked to rate the quality of...
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Whitepapers
Impact of Mobility on Routing Energy Consumption in Mobile Sensor Networks
November 10, 2011, 12:00am PST
Mobility in mobile sensor networks causes frequent route breaks, and each routing scheme reacts differently during route breaks. It results in a performance degradation of the energy consumption...
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Whitepapers
An Adaptive System Supporting Collaborative Learning Based on a Location-Based Social Network and Semantic User Modeling
January 2, 2012, 12:00am PST
In this paper, the authors present an adaptive e-learning system which supports collaborative learning based on a location-based social network and semantic modeling. In the system, a social...
Provided by Hindawi Publishing
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Whitepapers
Performance Analysis of Flow-Based Traffic Splitting Strategy on Cluster-Mesh Sensor Networks
December 3, 2011, 12:00am PST
Performance analysis is crucial for designing predictable and cost-efficient sensor networks. Based on the network calculus theory, the authors propose a flow-based traffic splitting strategy and...
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Whitepapers
Spatial and Temporal Correlations-Based Routing Algorithm in Intermittent Connectivity Human Social Network
January 14, 2012, 12:00am PST
The social network formed by people is one of the key applications of Delay-Tolerant Network (DTN). Owing to its intermittent connectivity and unique human mobility patterns, how to transmit data...
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Whitepapers
Efficient Complex Event Processing Over RFID Streams
January 6, 2012, 12:00am PST
RFID events are a large volume of stream data that continuously come out for tracking and monitoring objects. Many studies have been done to detect a complex event in the RFID stream. However, the...
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Whitepapers
Energy-Efficient Fire Monitoring Over Cluster-Based Wireless Sensor Networks
January 11, 2012, 12:00am PST
Uncontrolled fires occurring in wild areas cause significant damage to natural and human resources. Many countries are looking for ways to fight forest fires at an early stage using sensor...
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Whitepapers
A Study on Cluster Partitioning with Cooperative MISO Scheme in Wireless Sensor Networks
December 28, 2011, 12:00am PST
This paper addresses the cluster partitioning problem in wireless sensor networks deployed in a continuous area. The authors present the model of the network and describe its operational details...
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Whitepapers
Multichannel Communications in Wireless Automation: Interdependencies Between Communication and Control Parameters
December 25, 2011, 12:00am PST
Exploitation of wireless communications in various automation applications brings indisputable benefits, which has proliferated research efforts in the field during the recent years. In this...
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Whitepapers
Logic Macroprogramming for Wireless Sensor Networks
December 17, 2011, 12:00am PST
It is notoriously difficult and tedious to program Wireless Sensor Networks (WSNs). To simplify WSN programming, the authors propose Sense2P, a logic macro-programming system for abstracting,...
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Whitepapers
Energy Efficient MAC Protocol for Low-Energy Critical Infrastructure Monitoring Networks Using Wakeup Radio
February 2, 2012, 12:00am PST
Critical infrastructure monitoring applications are rapidly increasing. Application requirements include reliable data transfer, energy efficiency, and long deployment lifetime. In this paper, the...
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Whitepapers
Energy-Efficient Secure Path Algorithm for Wireless Sensor Networks
January 16, 2012, 12:00am PST
To collect the data and transmit them on the base station is the main task of the sensor nodes in Wireless Sensor Networks (WSNs). This transmission requires a specific routing algorithm. To...
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Whitepapers
InContexto: Multisensor Architecture to Obtain People Context from Smartphones
January 3, 2012, 12:00am PST
The way users interact with Smartphones is changing after the improvements made in their embedded sensors. Increasingly, these devices are being employed as tools to observe individuals habits....
Provided by Hindawi Publishing
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Whitepapers
A Distributed Reclustering Hierarchy Routing Protocol Using Social Welfare in Wireless Sensor Networks
January 26, 2012, 12:00am PST
Wireless Sensor Networks (WSNs) are capable of sensing physical or environmental conditions, such as motion, pressure, and images of the environment, as well as seismic, electromagnetic, and...
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Whitepapers
Enhancing Sink-Location Privacy in Wireless Sensor Networks Through K -Anonymity
January 7, 2012, 12:00am PST
Due to the shared nature of wireless communication media, a powerful adversary can eavesdrop on the entire radio communication in the network and obtain the contextual communication statistics,...
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Whitepapers
Traffic Rerouting Strategy Against Jamming Attacks in WSNs for Microgrid
February 25, 2012, 12:00am PST
In a micro-grid as an energy infrastructure, the vulnerability against jamming attacks is fatal. Thus, the ability to deal with jamming attacks and maintain an acceptable level of service...
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Whitepapers
On Optimal Antijamming Strategies in Sensor Networks
February 6, 2012, 12:00am PST
Physical layer radio jamming is a serious security threat to a wireless sensor network since the network relies on open wireless radio channels. A radio jammer is typically strategic and chooses...
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Whitepapers
Anchor-Node-Based Distributed Localization with Error Correction in Wireless Sensor Networks
January 18, 2012, 12:00am PST
Many applications of wireless sensor networks such as object tracking, environment and habitat monitoring, intrusion detection, and geographic routing rely on the location information of sensor...
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Whitepapers
Pervasive Smart Spaces and Environments: A Service-Oriented Middleware Architecture for Wireless Ad Hoc and Sensor Networks
February 27, 2012, 12:00am PST
In the twenty-first century, the impact of wireless and ubiquitous technologies is changing the way people perceive and interact with the physical world. These communication paradigms promise to...
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Whitepapers
Improving Accuracy for 3D RFID Localization
February 4, 2012, 12:00am PST
Radio Frequency IDentification (RFID) becomes a prevalent labeling and localizing technique in the recent years. Deploying indoor RFID localization systems facilitates many applications. Previous...
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Whitepapers
Dynamic Key-Updating: Privacy-Preserving Authentication for RFID Systems
February 14, 2012, 12:00am PST
The objective of private authentication for Radio Frequency IDentification (RFID) systems is to allow valid readers to explicitly authenticate their dominated tags without leaking the private...
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Whitepapers
Rendezvous Data Collection Using a Mobile Element in Heterogeneous Sensor Networks
February 20, 2012, 12:00am PST
Since the emergence, Wireless Sensor Networks (WSNs) undertake intensive data collection during the sensing period. However, the limited energy storage of tiny sensors involved in a WSN harshly...
Provided by Hindawi Publishing
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Whitepapers
A Local World Evolving Model for Energy-Constrained Wireless Sensor Networks
February 23, 2012, 12:00am PST
In this paper, the authors aim at improving the interactions among sensor nodes, and they present a heterogeneous local-world model to form large-scale wireless sensor networks based on complex...
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Whitepapers
An Extended Virtual Force-Based Approach to Distributed Self-Deployment in Mobile Sensor Networks
February 21, 2012, 12:00am PST
Wireless sensor networks can be deployed manually or spread randomly over the interested regions for practical applications. However, in many working environments, such as remote harsh fields,...
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Whitepapers
A Network Coding Based Rarest-First Packet Recovery Algorithm for Transmitting Geocast Packets Over Hybrid Sensor-Vehicular Networks
January 11, 2012, 12:00am PST
Vehicular Ad hoc NETwork (VANET) and road-side sensors are used to improve driving safety in many applications. Sensor nodes deployed along the roadside are used to sense road conditions and then...
Provided by Hindawi Publishing
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Whitepapers
A Mobile Agent Routing Algorithm in Dual-Channel Wireless Sensor Network
February 27, 2012, 12:00am PST
A Mobile Agent Routing Algorithm (MARA) is presented in this paper, and then based on the dual-channel communication model, the two-layer network combination optimization strategy is also...
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