Download or read book Loss resilient Proactive Data Transmission in Wireless Sensor Networks written by Yingqi Xu and published by . This book was released on 2006 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Among a wide range of sensor network applications, many of them require reliable data communication such that data packets can be delivered to the destination without loss. However, existing reliable transmission techniques either are too costly for resource-constrained sensor networks or have limited capabilities for achieving reliable data communication. In this paper, an effective coding scheme that exploits the tradeoff between redundant data transmission and encoding/decoding complexity is proposed. Two key design parameters of the proposed scheme, the degree of repair packets and the number of repair packets, are derived to achieve a high data recovery probability with minimum coding redundancy and computation overhead. Furthermore, the proposed scheme is leveraged under recoverable and permanent failure models for proactive transmission. Accordingly, the expected probability of a destination obtaining all data packets is analyzed. Simulations have been conducted to verify our theoretical results. The simulation results reveal profound insights in support of the proactive transmission paradigm to achieve high communication reliability in wireless sensor networks."

Download or read book Remote Sensing written by Boris Escalante and published by BoD – Books on Demand. This book was released on 2012-06-13 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual conception of remote sensing brought us to the idea of preparing two different books; in addition to the first book which displays recent advances in remote sensing applications, this book is devoted to new techniques for data processing, sensors and platforms. We do not intend this book to cover all aspects of remote sensing techniques and platforms, since it would be an impossible task for a single volume. Instead, we have collected a number of high-quality, original and representative contributions in those areas.

Download or read book Multiscale Entropy Approaches and Their Applications written by Anne Humeau-Heurtier and published by MDPI. This book was released on 2020-11-06 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiscale entropy (MSE) measures to evaluate the complexity of time series by taking into account the multiple time scales in physical systems were proposed in the early 2000s. Since then, these approaches have received a great deal of attention and have been used in a wide range of applications. Multivariate approaches have also been developed. The algorithms for an MSE approach are composed of two main steps: (i) a coarse-graining procedure to represent the system’s dynamics on different scales and (ii) the entropy computation for the original signal and for the coarse-grained time series to evaluate the irregularity for each scale. Moreover, different entropy measures have been associated with the coarse-graining approach, each one having its advantages and drawbacks. In this Special Issue, we gathered 24 papers focusing on either the theory or applications of MSE approaches. These papers can be divided into two groups: papers that propose new developments in entropy-based measures or improve the understanding of existing ones (9 papers) and papers that propose new applications of existing entropy-based measures (14 papers). Moreover, one paper presents a review of cross-entropy methods and their multiscale approaches.

Download or read book Resilient Data Aggregation in Wireless Sensor Networks written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Sensor nodes are low-cost and low-power devices that are prone to node compromises, communication failures and malfunctioning of sensing hardware. As a result, some nodes may report outlying data values, introducing significant deviations in the aggregated sensor readings. This thesis presents a practical resilient outlier detection technique to filter out the influence of the outlying data reported by faulty or compromised nodes. The proposed outlier detection algorithm is based on event localization using minimum mean squared error (MMSE) estimation combined with threshold-based consistency checking to detect outliers. Data aggregation is one of the key techniques commonly used to develop lightweight communication protocols applicable to wireless sensor networks. The proposed approach handles localization of multiple events by grouping the sensor readings into spatially correlated clusters and performing an event-centric detection of outliers. In the entire process of data aggregation, the outlier detection technique fits as a preprocessing stage for reducing the effect of outliers on the aggregated result. Suitable extensions to the basic outlier detection algorithm are proposed to effectively apply the algorithm to both centralized and decentralized sensor network architectures. This thesis further includes studies that test the effectiveness of the proposed approach, including the detection rate, the false positive rate, degree of damage and the resilience to malicious readings introduced by the attackers. The experimental results show that on average the proposed approach detects as high as 80-90% of the outliers while resulting in 5-15% false positive rate when the network consists of 40-45% outliers. The experiments also show that the extent of damage on the aggregated result is below 50% due to the elimination of outliers before aggregation. Finally, the resilient data aggregation process requires modest computational and memory requirements with zero commu.

Download or read book Resilient Data Aggregation in Wireless Sensor Networks written by Srinath Anantharaju and published by . This book was released on 2005 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: MMSE, Multiple Events, Event Detection Model, Distributed Outlier Detection, Spatial correlation, Event-centric Outlier Detection, Event Localization.

Download or read book Improving Data Transmission Reliability and Throughput in Wireless Sensor Networks written by Ee Foong Lee and published by . This book was released on 2008 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Compromise resilient Anti jamming Communication in Wireless Sensor Networks written by Xuan Jiang and published by . This book was released on 2011 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Secure Robust and Trusted Communications in Wireless Networks written by Mohit Virendra and published by . This book was released on 2008 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: ?Pub Inc This dissertation adopts a "data-first" approach for improving robustness and security guarantees in wireless communications: it provides solutions for robust data delivery under several threat and failure models associated with diverse network settings. The emphasis is on mitigating risks from exploits that target open-air properties of the wireless media. Two parallel streams of work address dominant data communication and design issues in Wireless Data Networks (WDNs, which include Mobile Ad-hoc and Wireless Mesh Networks) and Wireless Sensor Networks (WSNs). In line with the bottom-up approach in WDNs, the first scenario evaluated is survivable architectures for Wireless LANs (WLANs). This forms the basis for designing a broad Traffic Splitting Paradigm (TSP) at the Network layer for Mobile Ad-hoc and Wireless Mesh networks. Under TSP, mesh and ad-hoc nodes split and simultaneously schedule their traffic through multiple available routes to the destination. This dissertation is the first to use simultaneous activation of multiple paths. A mesh node can connect to multiple mesh routers over multiple wireless hops. If the mesh routers are connected together via a backbone network, then a node's traffic to the distribution system can be split across several paths to connected routers and a low cost reassembly of this traffic can be performed at the distribution system. This shifts the bottleneck from the wireless medium to the distribution system. To validate the efficacy of the traffic splitting protocol (TSP) from security and robustness viewpoints, a unique approach emulating adversarial behavior is adopted. In this approach, attacks are launched against both traffic splitting and single path protocols and the success probabilities for such attacks are compared. It is demonstrated that traffic splitting paradigms are provably resilient to jamming, blocking, node isolation, and network partition-type attacks. The broad term "Trust" is loosely coined to model selfish and greedy adversarial behavior as well as ambient network conditions like channel congestion that are detrimental to wireless networks performance. A trust-based environment aware routing scheme dynamically schedules traffic across several available routes in response to changing route conditions. A variant of the Trust Model is also used as basis for key establishment and key management decisions in the network if the network uses encryption protocols. Under current schemes, keys are established with a node as long as it has not been declared malicious previously. The TSP is limited in its effectiveness by the conventional CSMA/CA protocol at the MAC layer. IEEE 802.11 forces nodes to contend for channel access, promoting selfish behavior. For a node to successfully split and effectively schedule traffic through its neighbors, a contention avoiding cooperative MAC would be necessary. Multi-hop Wireless MAC (MWMAC) protocol is developed for this purpose. Under MWMAC, neighboring nodes schedule transmission intervals cooperatively and this reduces channel contention. The second stream of research is in the wireless sensor domain. Misaggregation and unaccounted data loss are amongst the most critical open problems in WSNs: it is hard to distinguish them from in-network-processing and passive participation, which are genuine techniques used for reducing communication and computation overhead. Here, a framework based on sampling-theory and cryptographic-techniques and comprising of non-interactive proofs and proxy reports is developed to bound the error margins in reported values and enable the Base Stations to detect outliers and potential cheating by aggregator nodes. The framework is marked by its simplicity and practical usability: all verification and error checking by the BS are performed in a single round of communication. The validation of the schemes presented in this dissertation is performed by a combined approach consisting of simulations, proof of concepts and theoretical evaluations and comparing their performance with existing techniques. It is deduced that some of these schemes may entail slight overheads in terms of network performance, but are beneficial in the enhanced security and robustness they provide. An attempt is made to integrate security into the protocol architectures themselves, thereby providing a composite framework of proactive and reactive schemes.

Download or read book Wireless Sensor Networks written by Fei Hu and published by CRC Press. This book was released on 2010-05-06 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by award-winning engineers whose research has been sponsored by the U.S. National Science Foundation (NSF), IBM, and Cisco's University Research Program, Wireless Sensor Networks: Principles and Practice addresses everything product developers and technicians need to know to navigate the field. It provides an all-inclusive examina

Download or read book Wireless Sensor Networks for Industrial Health Assessment Based on a Random Forest Approach written by Wiem Elghazel and published by . This book was released on 2015 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: An efficient predictive maintenance is based on the reliability of the monitoring data. In some cases, themonitoring activity cannot be ensured with individual or wired sensors. Wireless sensor networks (WSN) arethen an alternative. Considering the wireless communication, data loss becomes highly probable. Therefore,we study certain aspects of WSN reliability. We propose a distributed algorithm for network resiliency and datasurvival while optimizing energy consumption. This fault tolerant algorithm reduces the risks of data loss andensures the continuity of data transfer. We also simulated different network topologies in order to evaluate theirimpact on data completeness at the sink level. Thereafter, we propose an approach to evaluate the system'sstate of health using the random forests algorithm. In an offline phase, the random forest algorithm selects theparameters holding more information about the system's health state. These parameters are used to constructthe decision trees that make the forest. By injecting the random aspect in the training set, the algorithm (thetrees) will have different starting points. In an online phase, the algorithm evaluates the current health stateusing the sensor data. Each tree will provide a decision, and the final class is the result of the majority voteof all trees. When sensors start to break down, the data describing a health indicator becomes incompleteor unavailable. Considering that the trees have different starting points, the absence of some data will notnecessarily result in the interruption of the prediction process.

Download or read book Reliability of Data Collection and Transmission in Wireless Sensor Networks written by Basheer Al-Qassab and published by . This book was released on 2013 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: A network of wireless sensor nodes that are connected to a centralized base station is presented to conduct a study on reliability of data collection and transmission in wireless sensor networks (WSNs) with focus on data loss and data duplication. Software applications for specific sensor nodes called Sun SPOTs are presented, and programming techniques, for example packet transmitting time delay and data checking for loss and duplication, are implemented in these software applications to improve the functionality of the network. Acceleration data on a vibration plate are collected at sampling frequency of 100 Hz to validate the operation of the network. Additionally, the wireless sensor network is optimized to enhance the synchronization of data collection from different nodes. The result of this research shows that the reliability of the network is related to data sampling frequency, synchronization of the wireless data traffic, wireless sensor node signal strength, and wireless data routing protocols. The indoor tests on signal strength show the limitation of -70 dBm and higher for optimum data collection without data or packet loss.

Download or read book Smart Wireless Sensor Networks written by Yen Kheng Tan and published by IntechOpen. This book was released on 2010-12-14 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent development of communication and sensor technology results in the growth of a new attractive and challenging area - wireless sensor networks (WSNs). A wireless sensor network which consists of a large number of sensor nodes is deployed in environmental fields to serve various applications. Facilitated with the ability of wireless communication and intelligent computation, these nodes become smart sensors which do not only perceive ambient physical parameters but also be able to process information, cooperate with each other and self-organize into the network. These new features assist the sensor nodes as well as the network to operate more efficiently in terms of both data acquisition and energy consumption. Special purposes of the applications require design and operation of WSNs different from conventional networks such as the internet. The network design must take into account of the objectives of specific applications. The nature of deployed environment must be considered. The limited of sensor nodes resources such as memory, computational ability, communication bandwidth and energy source are the challenges in network design. A smart wireless sensor network must be able to deal with these constraints as well as to guarantee the connectivity, coverage, reliability and security of network's operation for a maximized lifetime. This book discusses various aspects of designing such smart wireless sensor networks. Main topics includes: design methodologies, network protocols and algorithms, quality of service management, coverage optimization, time synchronization and security techniques for sensor networks.

Download or read book Industrial Wireless Sensor Networks written by V. Çağrı Güngör and published by CRC Press. This book was released on 2017-12-19 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collaborative nature of industrial wireless sensor networks (IWSNs) brings several advantages over traditional wired industrial monitoring and control systems, including self-organization, rapid deployment, flexibility, and inherent intelligent processing. In this regard, IWSNs play a vital role in creating more reliable, efficient, and productive industrial systems, thus improving companies’ competitiveness in the marketplace. Industrial Wireless Sensor Networks: Applications, Protocols, and Standards examines the current state of the art in industrial wireless sensor networks and outlines future directions for research. What Are the Main Challenges in Developing IWSN Systems? Featuring contributions by researchers around the world, this book explores the software and hardware platforms, protocols, and standards that are needed to address the unique challenges posed by IWSN systems. It offers an in-depth review of emerging and already deployed IWSN applications and technologies, and outlines technical issues and design objectives. In particular, the book covers radio technologies, energy harvesting techniques, and network and resource management. It also discusses issues critical to industrial applications, such as latency, fault tolerance, synchronization, real-time constraints, network security, and cross-layer design. A chapter on standards highlights the need for specific wireless communication standards for industrial applications. A Starting Point for Further Research Delving into wireless sensor networks from an industrial perspective, this comprehensive work provides readers with a better understanding of the potential advantages and research challenges of IWSN applications. A contemporary reference for anyone working at the cutting edge of industrial automation, communication systems, and networks, it will inspire further exploration in this promising research area.

Download or read book Secure Data Transmission in Wireless Sensor Networks written by Corinna Schmitt and published by . This book was released on 2013 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wireless Sensor Networks written by Kazem Sohraby and published by John Wiley & Sons. This book was released on 2007-04-06 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrastructure for Homeland Security Environments Wireless Sensor Networks helps readers discover the emerging field of low-cost standards-based sensors that promise a high order of spatial and temporal resolution and accuracy in an ever-increasing universe of applications. It shares the latest advances in science and engineering paving the way towards a large plethora of new applications in such areas as infrastructure protection and security, healthcare, energy, food safety, RFID, ZigBee, and processing. Unlike other books on wireless sensor networks that focus on limited topics in the field, this book is a broad introduction that covers all the major technology, standards, and application topics. It contains everything readers need to know to enter this burgeoning field, including current applications and promising research and development; communication and networking protocols; middleware architecture for wireless sensor networks; and security and management. The straightforward and engaging writing style of this book makes even complex concepts and processes easy to follow and understand. In addition, it offers several features that help readers grasp the material and then apply their knowledge in designing their own wireless sensor network systems: * Examples illustrate how concepts are applied to the development and application of * wireless sensor networks * Detailed case studies set forth all the steps of design and implementation needed to solve real-world problems * Chapter conclusions that serve as an excellent review by stressing the chapter's key concepts * References in each chapter guide readers to in-depth discussions of individual topics This book is ideal for networking designers and engineers who want to fully exploit this new technology and for government employees who are concerned about homeland security. With its examples, it is appropriate for use as a coursebook for upper-level undergraduates and graduate students.

Download or read book Security and Resilience in Intelligent Data Centric Systems and Communication Networks written by Massimo Ficco and published by Academic Press. This book was released on 2017-09-29 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Security and Resilience in Intelligent Data-Centric Systems and Communication Networks presents current, state-of-the-art work on novel research in theoretical and practical resilience and security aspects of intelligent data-centric critical systems and networks. The book analyzes concepts and technologies that are successfully used in the implementation of intelligent data-centric critical systems and communication networks, also touching on future developments. In addition, readers will find in-demand information for domain experts and developers who want to understand and realize the aspects (opportunities and challenges) of using emerging technologies for designing and developing more secure and resilient intelligent data-centric critical systems and communication networks. Topics covered include airports, seaports, rail transport systems, plants for the provision of water and energy, and business transactional systems. The book is well suited for researchers and PhD interested in the use of security and resilient computing technologies. - Includes tools and techniques to prevent and avoid both accidental and malicious behaviors - Explains the state-of-the-art technological solutions for main issues hindering the development of monitoring and reaction solutions - Describes new methods and technologies, advanced prototypes, systems, tools and techniques of future direction

Download or read book Bridge Maintenance Safety Management Resilience and Sustainability written by Fabio Biondini and published by CRC Press. This book was released on 2012-06-21 with total page 4119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge Maintenance, Safety, Management, Resilience and Sustainability contains the lectures and papers presented at The Sixth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2012), held in Stresa, Lake Maggiore, Italy, 8-12 July, 2012. This volume consists of a book of extended abstracts (800 pp) Extensive collection of revised expert papers on recent advances in bridge maintenance, safety, management and life-cycle performance, representing a major contribution to the knowledge base of all areas of the field.