Download or read book Topology Control and Data Handling in Wireless Sensor Networks written by L. L. Shum and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Our work in this thesis have provided two distinctive contributions to WSNs in the areas of data handling and topology control. In the area of data handling, we have demonstrated a solution to improve the power efficiency whilst preserving the important data features by data compression and the use of an adaptive sampling strategy, which are applicable to the specific application for oceanography monitoring required by the SECOAS project. Our work on oceanographic data analysis is important for the understanding of the data we are dealing with, such that suitable strategies can be deployed and system performance can be analysed. The Basic Adaptive Sampling Scheduler (BASS) algorithm uses the statistics of the data to adjust the sampling behaviour in a sensor node according to the environment in order to conserve energy and minimise detection delay. The motivation of topology control (TC) is to maintain the connectivity of the network, to reduce node degree to ease congestion in a collision-based medium access scheme; and to reduce power consumption in the sensor nodes. We have developed an algorithm Subgraph Topology Control (STC) that is distributed and does not require additional equipment to be implemented on the SECOAS nodes. STC uses a metric called subgraph number, which measures the 2-hops connectivity in the neighbourhood of a node. It is found that STC consistently forms topologies that have lower node degrees and higher probabilities of connectivity, as compared to k-Neighbours, an alternative algorithm that does not rely on special hardware on sensor node. Moreover, STC also gives better results in terms of the minimum degree in the network, which implies that the network structure is more robust to a single point of failure. As STC is an iterative algorithm, it is very scalable and adaptive and is well suited for the SECOAS applications.

Download or read book Topology Control and Data Handling in Wireless Sensor Networks written by Lam Ling Shum and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Topology Control in Wireless Sensor Networks written by Miguel A. Labrador and published by Springer Science & Business Media. This book was released on 2009-02-27 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eld of wireless sensor networks continues to evolve and grow in both practical and research domains. More and more wireless sensor networks are being used to gather information in real life applications. It is common to see how this technology is being applied in irrigation systems, intelligent buildings, bridges, security mec- nisms,militaryoperations,transportation-relatedapplications,etc.Atthesametime, new developments in hardware, software, and communication technologies are - panding these possibilities. As in any other technology, research brings new dev- opments and re nements and continuous improvements of current approaches that push the technology even further. Looking toward the future, the technology seems even more promising in two directions. First, a few years from now more powerful wireless sensor devices will be available, and wireless sensor networks will have applicability in an endless number of scenarios, as they will be able to handle traf c loads not possible today, make more computations, store more data, and live longer because of better energy sources. Second,a few years from now, the opposite scenario might also be possible. The availability of very constrained, nanotechnology-made wireless sensor devices will bring a whole new world of applications, as they will be able to operate in - vironments and places unimaginable today. These two scenarios, at the same time, will both bring new research challenges that are always welcome to researchers.

Download or read book The Art of Wireless Sensor Networks written by Habib M. Ammari and published by Springer Science & Business Media. This book was released on 2013-12-13 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last one and a half decades, wireless sensor networks have witnessed significant growth and tremendous development in both academia and industry. “The Art of Wireless Sensor Networks: Volume 1: Fundamentals” focuses on the fundamentals concepts in the design, analysis, and implementation of wireless sensor networks. It covers the various layers of the lifecycle of this type of network from the physical layer up to the application layer. Its rationale is that the first volume covers contemporary design issues, tools, and protocols for radio-based two-dimensional terrestrial sensor networks. All the book chapters in this volume include up-to-date research work spanning various classic facets of the physical properties and functional behavior of wireless sensor networks, including physical layer, medium access control, data routing, topology management, mobility management, localization, task management, data management, data gathering, security, middleware, sensor technology, standards, and operating systems. This book will be an excellent source of information for both senior undergraduate and graduate students majoring in computer science, computer engineering, electrical engineering, or any related discipline. In addition, computer scientists, researchers, and practitioners in both academia and industry will find this book useful and interesting.

Download or read book Wireless Sensor And Robot Networks From Topology Control To Communication Aspects written by Nathalie Mitton and published by World Scientific. This book was released on 2013-12-19 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless sensor networks have gained much attention these last years thanks to the great set of applications that accelerated the technological advances. Such networks have been widely investigated and many books and articles have been published about the new challenges they pose and how to address them. One of these challenges is node mobility: sensors could be moved unexpectedly if deployed in an uncontrolled environment or hold by moving object/animals.Beyond all this, a new dimension arises when this mobility is controlled, i.e. if these sensors are embedded in robots. These robots cohabit with sensors and cooperate together to perform a given task collectively by presenting hardware constraints: they still rely on batteries; they communicate through short radio links and have limited capacities.In this book, we propose to review new challenges brought about by controlled mobility for different goals and how they are addressed in the literature in wireless sensor and Robot networks, ranging from deployment to communications.

Download or read book Underwater Acoustic Sensor Networks written by Yang Xiao and published by CRC Press. This book was released on 2010-05-19 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed review of underwater channel characteristics, Underwater Acoustic Sensor Networks investigates the fundamental aspects of underwater communication. Prominent researchers from around the world consider contemporary challenges in the development of underwater acoustic sensor networks (UW-ASNs) and introduce a cross-layer approach for effec

Download or read book Wireless Sensor Networks and Applications written by Yingshu Li and published by Springer Science & Business Media. This book was released on 2008-02-10 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: A crucial reference tool for the increasing number of scientists who depend upon sensor networks in a widening variety of ways. Coverage includes network design and modeling, network management, data management, security and applications. The topic covered in each chapter receives expository as well as scholarly treatment, covering its history, reviewing state-of-the-art thinking relative to the topic, and discussing currently unsolved problems of special interest.

Download or read book Handbook of Research on Developments and Trends in Wireless Sensor Networks From Principle to Practice written by Jin, Hai and published by IGI Global. This book was released on 2010-02-28 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book showcases the work many devoted wireless sensor network researchers all over world, and exhibits the up-to-date developments of WSNs from various perspectives"--Provided by publisher.

Download or read book Wireless Ad Hoc and Sensor Networks written by Jing (Selina) He and published by CRC Press. This book was released on 2013-08-06 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although wireless sensor networks (WSNs) have been employed across a range of applications, there are few books available that cover the required algorithms, performance analysis, and applications of network management techniques in WSNs. Filling this need, this book presents new network management techniques that can address many of the shortcomings of traditional techniques. It summarizes traditional and classical network management techniques as well as state-of-the-art methods.

Download or read book Wireless Sensor and Actuator Networks written by Amiya Nayak and published by John Wiley & Sons. This book was released on 2010-02-12 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: This timely book offers a mixture of theory, experiments, and simulations that provides qualitative and quantitative insights in the field of sensor and actuator networking. The chapters are selected in a way that makes the book comprehensive and self-contained. It covers a wide range of recognized problems in sensor networks, striking a balance between theoretical and practical coverage. The book is appropriate for graduate students and practitioners working as engineers, programmers, and technologists.

Download or read book Networking Wireless Sensors written by Bhaskar Krishnamachari and published by Cambridge University Press. This book was released on 2005-12-22 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless sensor networks promise an unprecedented fine-grained interface between the virtual and physical worlds. They are one of the most rapidly developing information technologies, with applications in a wide range of fields including industrial process control, security and surveillance, environmental sensing, and structural health monitoring. Originally published in 2005, this book provides a detailed and organized survey of the field. It shows how the core challenges of energy efficiency, robustness, and autonomy are addressed in these systems by networking techniques across multiple layers. The topics covered include network deployment, localization, time synchronization, wireless radio characteristics, medium-access, topology control, routing, data-centric techniques, and transport protocols. Ideal for researchers and designers seeking to create algorithms and protocols and engineers implementing integrated solutions, it also contains many exercises and can be used by graduate students taking courses in networks.

Download or read book Wireless Sensor Networks written by Nirupama Bulusu and published by Artech House Publishers. This book was released on 2005 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first-of-its-kind resource offers you an in-depth understanding of wireless sensor networks from a systems perspective. The book describes and categorizes the technological trends, leading applications, state-of-the-art platform developments, future trends, and challenges of sensor networks. You find critical coverage of network protocols and mechanisms for node localization, time synchronization, media access control, topology creation and management, routing, transport, storage, collaborative signal processing, security and fault tolerance, and node deployment in large-scale sensor networks.

Download or read book Energy aware Topology Control and Data Delivery in Wireless Sensor Networks written by Seung-Jong Park and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this thesis is to address the problem of energy conservation in wireless sensor networks by tackling two fundamental problems: topology control and data delivery. We first address energy-aware topology control taking into account throughput per unit energy as the primary metric of interest. Through both experimental observations and analysis, we show that the optimal topology is a function of traffic load in the network. We then propose a new topology control scheme, Adaptive Topology Control (ATC), which increases throughput per unit energy. Based on different coordinations among nodes, we proposed three ATC schemes: ATC-CP, ATC-IP, and ATC-MS. Through simulations, we show that three ATC schemes outperform static topology control schemes, and particularly the ATC-MS has the best performance under all environments. Secondly, we explore an energy-aware data delivery problem consisting of two sub-problems: downstream (from a sink to sensors) and upstream (from sensors to a sink) data delivery. Although we address the problems as two independent ones, we eventually solve those problems with two approaches: GARUDA-DN and GARUDA-UP which share a common structure, the minimum dominating set. For the downstream data delivery, we consider reliability as well as energy conservation since unreliable data delivery can increase energy consumption under high data loss rates. To reduce energy consumption and achieve robustness, we propose GARUDA-DN which is scalable to the network size, message characteristics, loss rate and the reliable delivery semantics. From ns2-based simulations, we show that GARUDA-DN performs significantly better than the basic schemes proposed thus far in terms of latency and energy consumption. For the upstream data delivery, we address an energy efficient aggregation scheme to gather correlated data with theoretical solutions: the shortest path tree (SPT), the minimum spanning tree (MST) and the Steiner minimum tree (SMT). To approximate the optimal solution in case of perfect correlation among data, we propose GARUDA-UP which combines the minimum dominating set (MDS) with SPT in order to aggregate correlated data. From discrete event simulations, we show that GARUDA-UP outperforms the SPT and closely approximates the centralized optimal solution, SMT, with less amount of overhead and in a decentralized fashion.

Download or read book Cooperating Embedded Systems and Wireless Sensor Networks written by Michel Banatre and published by John Wiley & Sons. This book was released on 2010-01-05 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of different system concepts have become apparent in the broader context of embedded systems over the past few years. Whilst there are some differences between these, this book argues that in fact there is much they share in common, particularly the important notions of control, heterogenity, wireless communication, dynamics/ad hoc nature and cost. The first part of the book covers cooperating object applications and the currently available application scenarios, such as control and automation, healthcare, and security and surveillance. The second part discusses paradigms for algorithms and interactions. The third part covers various types of vertical system functions, including data aggregation, resource management and time synchronization. The fourth part outlines system architecture and programming models, outlining all currently available architectural models and middleware approaches that can be used to abstract the complexity of cooperating object technology. Finally, the book concludes with a discussion of the trends guiding current research and gives suggestions as to possible future developments and how various shortcomings in the technology can be overcome.

Download or read book Hierarchical Topology Control for Wireless Networks written by Jiguo Yu and published by CRC Press. This book was released on 2018-02-05 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 2018. Routledge is an imprint of Taylor & Francis, an Informa company.

Download or read book The Art of Wireless Sensor Networks written by Habib M. Ammari and published by Springer Science & Business Media. This book was released on 2013-12-17 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last one and a half decades, wireless sensor networks have witnessed significant growth and tremendous development in both academia and industry. A large number of researchers, including computer scientists and engineers, have been interested in solving challenging problems that span all the layers of the protocol stack of sensor networking systems. Several venues, such as journals, conferences, and workshops, have been launched to cover innovative research and practice in this promising and rapidly advancing field. Because of these trends, I thought it would be beneficial to provide our sensor networks community with a comprehensive reference on as much of the findings as possible on a variety of topics in wireless sensor networks. As this area of research is in continuous progress, it does not seem to be a reasonable solution to keep delaying the publication of such reference any more. This book relates to the second volume and focuses on the advanced topics and applications of wireless sensor networks. Our rationale is that the second volume has all application-specific and non-conventional sensor networks, emerging techniques and advanced topics that are not as matured as what is covered in the first volume. Thus, the second volume deals with three-dimensional, underground, underwater, body-mounted, and societal networks. Following Donald E. Knuth’s above-quoted elegant strategy to focus on several important fields (The Art of Computer Programming: Fundamental Algorithms, 1997), all the book chapters in this volume include up-to-date research work spanning various topics, such as stochastic modeling, barrier and spatiotemporal coverage, tracking, estimation, counting, coverage and localization in three-dimensional sensor networks, topology control and routing in three-dimensional sensor networks, underground and underwater sensor networks, multimedia and body sensor networks, and social sensing. Most of these major topics can be covered in an advanced course on wireless sensor networks. This book will be an excellent source of information for graduate students majoring in computer science, computer engineering, electrical engineering, or any related discipline. Furthermore, computer scientists, researchers, and practitioners in both academia and industry will find this book useful and interesting.

Download or read book Topology Management Protocols in Ad Hoc Wireless Sensor Networks written by Ho Gil Kim and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A wireless sensor network (WSN) is comprised of a few hundred or thousand autonomous sensor nodes spatially distributed over a particular region. Each sensor node is equipped with a wireless communication device, a small microprocessor, and a battery-powered energy source. Typically, the applications of WSNs such as habitat monitoring, re detection, and military surveillance, require data collection, processing, and transmission among the sensor nodes. Due to their energy constraints and hostile environments, the main challenge in the research of WSN lies in prolonging the lifetime of WSNs. In this dissertation, we present four different topology management protocols for K-coverage and load balancing to prolong the lifetime of WSNs. First, we present a Randomly Ordered Activation and Layering (ROAL) protocol for K-coverage in a stationary WSN. The ROAL suggests a new model of layer coverage that can construct a K-covered WSN using the layer information received from its previously activated nodes in the sensing distance. Second, we enhance the fault tolerance of layer coverage through a Circulation-ROAL (C-ROAL) protocol. Using the layer number, the C-ROAL can activate each node in a round-robin fashion during a predefined period while conserving reconfiguration energy. Next, Mobility Resilient Coverage Control (MRCC) is presented to assure K-coverage in the presence of mobility, in which a more practical and reliable model for K-coverage with nodal mobility is introduced. Finally, we present a Multiple-Connected Dominating Set(MCDS) protocol that can balance the network traffic using an on-demand routing protocol. The MCDS protocol constructs and manages multiple backbone networks, each of which is constructed with a connected dominating set (CDS) to ensure a connected backbone network. We describe each protocol, and compare the performance of our protocols with Dynamic Source Routing (DSR) and/or existing K-coverage algorithms through extensive simulations. The simulation results obtained by the ROAL protocol show that K-coverage can be guaranteed with more than 95% coverage ratio, and significantly extend network lifetime against a given WSN. We also observe that the C-ROAL protocol provides a better reconfiguration method, which consumes only less than 1% of the reconfiguration energy in the ROAL protocol, with a greatly reduced packet latency. The MRCC protocol, considering the mobility, achieves better coverage by 1.4% with 22% fewer active sensors than that of an existing coverage protocol for the mobility. The results on the MCDS protocol show that the energy depletion ratio of nodes is decreased consequently, while the network throughput is improved by 35%.