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Wireless sensor networks
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A centralrootnode (the top level of the hierarchy) is connected to one or more other nodes that are one level lower in the hierarchy (ie, the second level) with a point-to-point link between each of the second level nodes and the top level centralrootnode, while each of
Wireless communications: principles and practice
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2.6 Trunking and Grade of Service Cellular radio systems rely on trunking to accommodate a large number of users in a limited radio spectrum. The concept of trunking allows a large number of users to share the relatively small number of channels in a cell by providing
Wireless security
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Contents Foreword xxi Preface xxv List oí Contributors xxxiii Why is Wireless Different 1 Introduction 1 Protecting the Means Of Communication 2 Protecting Privacy 2 Promoting Safety 4 The Personal and the Public 5 Shaking Up the Status Quo 6 Understanding Wireless Forecasts 7 Reasonable
Spread spectrum CDMA systems for wireless communications
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Third generation (3G) mobile communications systems are expected to provide high quality global roaming capability for voice, data, Internet browsing, and multimedia applications. Proposed 3G technology will utilize some form of spread spectrum technology in the
Wireless sensor network designs
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The emergence of compact, low-power, wireless communication sensors and actuators in the technology supporting the ongoing miniaturization of processing and storage, allows for entirely new kinds of embedded system. These systems are distributed and deployed in A CIP Catalogue record for this book is available from the Library of Congress. ISBN-10 1-4020-4710-X (HB) ISBN-13 978-1-4020-4710-7 (HB) ISBN-10 1-4020-4711-8 (e-book)
Wireless network security
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Wireless communications offer organizations and users many benefits such as portability and flexibility, increased productivity, and lower installation costs. Wireless technologies cover a broad range of differing capabilities oriented toward different uses and needs The vast reduction in size and power consumption of CMOS circuitry has led to a large research effort based around the vision of wireless sensor networks. The proposed networks will be comprised of thousands of small wireless nodes that operate in a multi-hop fashionTime synchronization is a critical piece of infrastructure for any distributed system. Distributed, wireless sensor networks make extensive use of synchronized time, but often have unique requirements in the scope, lifetime, and precision of the synchronization
Routing in clustered multihop, mobile wireless networks with fading channel
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A clusterhead-token infrastructure for multihop, mobile wireless networks has been designed. Traditional routing algorithms in wireline networks are not feasible for mobile wireless environment due to the dynamic change in link connectivity. To gain better
System architecture for wireless sensor networks
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Jason Lester Hill Doctor of Philosophy in Computer Science University of California at Berkeley Professor David Culler, Chair In this thesis we present and operating system and three generations of a hardware platform designed to address the needs of wireless sensor
Wireless sensor networks in precision agriculture
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We present the initial setup of the Lofar Agro project that concentrates on monitoring micro- climates in a crop field. In addition to the agronomic experiment, Lofar Agro aims at gathering statistics on the wireless sensor network itself. These statistics will form the basis
Routing protocols in wireless sensor networks A survey
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Advances in wireless sensor network (WSN) technology has provided the availability of small and low-cost sensor nodes with capability of sensing various types of physical and environmental conditions, data processing, and wireless communication. Variety of sensing
TEEN: ARouting Protocol for Enhanced Efficiency in Wireless Sensor Networks.
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Wireless sensor networks are expected to find wide applicability and increasing deployment in the near future. In this paper, we propose a formal classification of sensor networks, based on their mode of functioning, as proactive and reactivenetworks. Reactive networks, as
Four-bit wireless link estimation.
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We consider the problem of estimating link quality in an ad-hoc wireless mesh. We argue that estimating links well requires combining information from the network, link, and physical layers. We propose narrow, protocol-independent interfaces for the layers, which in total
QoS Support in Wireless Sensor Networks: A Survey.
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In this paper, we assess the state of the art of Quality of Services (QoS) support in wireless sensor networks (WSNs). Unlike traditional end-to-end multimedia applications, many non- end-to-end mission-critical applications envisioned for WSNs have brought forward new
Zigbee technology: Wireless control that simply works
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Up till now there hasnt been a wireless network standard that meets the unique needs of sensors and control devices. Sensors and controls dont need high bandwidth but they do need low latency and very low energy consumption for long battery lives and for large
Modelling data-centric routing in wireless sensor networks
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Sensor networks differ from traditional networks in several ways: sensor networks have severe energy constraints, redundant low-rate data, and many-to-one flows. The end-to-end routing schemes that have been proposed in the literature for mobile ad-hoc networks are
Explicit loss notification and wireless web performance
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This paper describes our experiences with improving TCP and Web performance over a WaveLAN-based wireless network. In previous work, we analyzed the problems to TCP performance in error-prone wireless networks and designed the Berkeley Snoop protocol toThe WiMax Forum (www. wimaxforum. org) a wireless industry consortium with about 100 members including such major vendors as ATT, Fujitsu, Intel, and Siemens Mobile is supporting WiMax technology and promoting its commercial use. As WiMax has gained CSE PROJECTS