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Wi-Fi Integration to the 4G Mobile Network
by Andre PerezThe adoption of smartphones has had as a corollary the use of services that require streaming, such as video streaming, which is a constraint for the 4G mobile network. The integration of the network of Wi-Fi hotspots deployed by the operators adds capacity to the 4G mobile network.The use of Wi-Fi technology in carrier networks is the result of developments coordinated by the IEEE, WFA and WBA standardization bodies. For its part, the 3GPP standardization body has been working to integrate Wi-Fi technology into the 4G mobile network.The first part of this book presents the characteristics of the Wi-Fi radio interface. The different IEEE 802.11b / g / n / ac physical layers characterize the implementation in the 2.4 GHz ISM frequency bands and U- NII at 5 GHz. The MAC layer defines a number of media access procedures such as scanning, associating, or transferring data.The second part of this book deals with the architecture of the 4G network based on the Wi-Fi interface. This architecture defines several models corresponding, on the one hand, to Wi-Fi access controlled or not, On the other hand, to a handover controlled by the network or by the mobile. The integration of Wi-Fi technology resulted in a redefinition of attachment and session set-up procedures.Smartphones have the ability to activate simultaneously the two radio interfaces, LTE and Wi-Fi, which allows to direct certain services to one and / or the other of the interfaces. The ANDSF and HotSpot 2.0 functions provide the mobile with rules for network selection and traffic control to determine which traffic is to be routed to what type of interface.
WiFi, WiMAX and LTE Multi-hop Mesh Networks
by Hung-Yu Wei Sudhir Dixit Jarogniew RykowskiWifi, WiMAX, and Cellular Multihop Networks presents an overview of WiFi-based and WiMAX-based multihop relay networks. As the first text to cover IEEE 802.16j multihop hop relay technology, this revolutionary resource explores the latest advances in multi-hop and ad-hoc networking. Not only does this reference provide the technological aspects, but also the applications for the emerging technology and architectural issues. Ranging from introductory material to advanced topics, this guidebook, plus PowerPoint slides, is essential for engineers, researchers, and students interested in learning more about WiFi and WiMAX multihop relay networks.
WiMAX Modeling: Techniques and Applications
by Rohit M. Thanki Komal R. Borisagar Bhavin S. SedaniThis book provides information about wireless systems and WIMAX modeling. The authors provide various techniques for the WiMAX systems such as antenna diversity and Alamouti coding. The performance of these systems is tested using various types of data and the results of systems are presented and discussed. Additional topics include WiMAX simulation using diversity techniques and real time WiMAX system modeling. The book pertains to researchers, academics, students, and professionals.Provides information about wireless system modeling and WiMAX systems;Presents WiMAX system modeling using antenna diversity techniques and the Alamouti coding scheme;Includes real time WiMAX system modeling for speech signal and digital images.
WiMAX Network Planning and Optimization (Wireless Networks and Mobile Communications)
by Yan ZhangThis book offers a comprehensive explanation on how to dimension, plan, and optimize WiMAX networks. The first part of the text introduces WiMAX networks architecture, physical layer, standard, protocols, security mechanisms, and highly related radio access technologies. It covers system framework, topology, capacity, mobility management, handoff m
WiMAX Networks
by Ramjee Prasad Fernando J. VelezIgnited by the mobile phone's huge success at the end of last century, the demand for wireless services is constantly growing. To face this demand, wireless systems have been and are deployed at a large scale. These include mobility-oriented technologies such as GPRS, CDMA or UMTS, and Local Area Network-oriented technologies such as WiFi. WiMAX Networks covers aspects of WiMAX quality of service (QoS), security, mobility, radio resource management, multiple input multiple output antenna, planning, cost/revenue optimization, physical layer, medium access control (MAC) layer, network layer, and so on.
WiMAX Security and Quality of Service
by Peter Muller Hamid Sharif Seok-Yee TangWiMAX is the first standard technology to deliver true broadband mobility at speeds that enable powerful multimedia applications such as Voice over Internet Protocol (VoIP), online gaming, mobile TV, and personalized infotainment. WiMAX Security and Quality of Service, focuses on the interdisciplinary subject of advanced Security and Quality of Service (QoS) in WiMAX wireless telecommunication systems including its models, standards, implementations, and applications. Split into 4 parts, Part A of the book is an end-to-end overview of the WiMAX architecture, protocol, and system requirements. Security is an essential element in the wireless world and Part B is fully dedicated to this topic. Part C provides an in depth analysis of QoS, including mobility management in WiMAX. Finally, Part D introduces the reader to advanced and future topics.One of the first texts to cover security, QoS and deployments of WiMAX in the same book. Introduces the primary concepts of the interdisciplinary nature of WiMAX security and QoS, and also includes discussion of hot topics in the field. Written for engineers and researchers, answering practical questions from industry and the experimental field in academia. Explains how WiMAX applications' security and QoS are interconnected and interworked among the cross layers.
WiMAX/MobileFi: Advanced Research and Technology
by Yang XiaoWiMAX is bringing about a worldwide revolution in broadband wireless access, including both fixed and mobile handsets. The IEEE 802.16 working group standardized most aspects of WiMAX signaling messages. However, several algorithms were left unspecified opening the door for innovations in protocol engineering for 802.16/802.20-based broadband wirel
WiMAX: A Wireless Technology Revolution
by G. Radhamani G.S.V. Radha RaoExamining the technology's global development and deployment activities, WiMAX: A Wireless Technology Revolution presents its unique features and evaluates its revolutionary approach. The book covers the mission, product, and services of WiMAX, as well as specific features such as security and mobility. It discusses the implementation of the IEEE 802.16 standard and also explores how WiMax stacks up to 3G and 4G and the economic and opportunity costs. This reference also analyzes the future prospects of WiMAX and its contribution to the wireless and mobile communication technology field. It is a must-have resource for those who are either intrigued or involved with this standards-based technology.
WiMAX: Taking Wireless to the MAX (Informa Telecoms & Media)
by Deepak PareekWith market value expected to reach $5 billion by 2007 and the endorsement of some of the biggest names in telecommunications, World Interoperability for Microwave Access (WiMAX) is poised to change the broadband wireless landscape. But how much of WiMAX's touted potential is merely hype? Now that several pre-WiMAX networks have been deployed, what
Wicked Problems: Herausforderungen für PR und Organisationskommunikation (Organisationskommunikation)
by Katrin Hassenstein Swaran Sandhu Christine RitzPR und Organisationskommunikation müssen zunehmend wicked problems, also verzwickte Probleme, lösen. Ob Digitalisierung, Künstliche Intelligenz oder andere aktuelle Entwicklungen, sie stellen die PR und Organisationskommunikation vor knifflige oder verzwickte Probleme: Für diese kann es keine einfachen Lösungen geben, weil sie sich dynamisch entwickeln und nicht zentral geregelt werden können. Die Beiträge zeigen dies aus unterschiedlichen Perspektiven auf und stellen sich den Herausforderungen von wicked problems auf Mikro-, Meso- und Makroebene sowie auf einer Querschnittsebene.
Wide-Range Antennas
by Boris LevinExpanding the range of antenna frequency is the main objective of this book. Solutions proposed are based on the development of new theoretical methods for analyzing and synthesizing antennas. The book shows that concentrated capacitive loads connected along linear and V-antennas provide a high level of matching with a cable over a wide frequency range and improves directional characteristics of antennas, i.e. increases the communication distance. New theoretical methods are proposed for analysis and synthesis of antennas under consideration: 1) method of calculating directional characteristics of radiators with a given current distribution, and 2) method of electrostatic analogy for calculating mutual and total fields of complex multi-element radiating structures. These methods allow us to obtain optimal directional characteristics for director-type antennas (arrays of Yagi-Uda) and log-periodic antennas with concentrated capacitances and show that use of capacitors makes it possible to extend the frequency range of the director antennas and to decrease dimensions of the log-periodic antennas Multi-element (flat and three-dimensional) self-complementary antennas with different variants of connecting generator poles and cable wires to antenna elements are proposed, which improves the matching with a cable. Characteristics of flat structures are compared with characteristics of volume structures: conical, parabolic, and located on a pyramid edges. The book describes new versions of transparent antennas, antennas for cellular communication, multi-tier and multi-radiator antennas, and much more.
Wideband FM Techniques for Low-Power Wireless Communications
by John F.M. GerritsUltra Wideband (UWB) communications are poised to enable short-range applications, such as remote health monitoring (e-health) and home or office automation. Sensor networks are also suitable candidates for UWB since the low radiated power of the UWB transmitter enables low DC power consumption, yielding long battery life and the possibility to use energy scavenging. Size and cost constraints require a low-complexity approach that allows multiple users to share the same RF bandwidth, and offers robustness to interference, frequency-selective multipath and antenna mismatch. Wideband FM Techniques for Low-Power Wireless Communications presents research and applications that have taken place in UWB Communications over the past years. This book is being published posthumously in agreement with the authors’ former colleagues from both the Swiss Center for Electronics and Microtechnology (CSEM) and Delft University of Technology in The Netherlands.
Wideband, Multiband, and Smart Antenna Systems (Signals and Communication Technology)
by Mohammad Abdul MatinThis book provides current R&D trends and novel approaches in design and analysis of broadband, multiband, and smart antennas for 5G and B5G mobile and wireless applications, as well as the identification of integration techniques of these antennas in a diverse range of devices. The book presents theoretical and experimental approaches to help the reader in understanding the unique design issues and more advanced research. Moreover, the book includes chapters on the fundamentals of antenna theory. The book is pertinent to professionals and researchers working in the field of antenna engineering; it is written for graduate students, researchers, academics, and industry practitioners who want to improve their understanding in the current research trends in design analysis of broadband, multiband, and smart antennas for wireless applications.
Widening the Family Circle: New Research on Family Communication
by Dr Kory W. Floyd Dr Mark T. MormanWidening the Family Circle: New Research on Family Communication, Second Edition continues to address historically under-studied family relationships, such as those involving grandparents, in-laws, cousins, stepfamilies, and adoptive parents. In this engaging text, editors Kory Floyd and Mark T. Morman bring together a diverse collection of empirical studies, theoretic essays, and critical reviews of literature on communication to constitute a stronger, more complete understanding of communication within the family.
Wife in the North :
by Judith O'ReillyWhen Judith O’Reilly, a successful journalist and mother of three, agreed to leave London for a remote northern outpost, she made a deal with her husband that the move was a test-run to weigh the benefits of country living. In the rugged landscape of Northumberland County, O’Reilly swapped her high heels for rubber boots and life-long friends for cows, sheep, and strange neighbors. In this tremendously funny and acutely observed memoir, O’Reilly must navigate the challenges and rewards of motherhood, marriage, and family as she searches for her own true north in an alien landscape. Her intrepid foray into the unknown is at once a hilarious, fish-out-of-water story and a poignant reflection on the modern woman’s dilemma of striking the right balance between career and family.
Wigner-Verteilung trifft Lichtquantenleiter (essentials)
by Reiner ThieleReiner Thiele löst die Leitungsgleichungen des Lichtquantenleiters. Er erhält aus diesen Ergebnissen eine einheitliche Impulsantwort, unabhängig von der Ansteuerart dieses Übertragungskanals. Weiterhin berechnet der Autor die Wigner-Spannungsverteilung und -Stromverteilung des Eingangs- und Ausgangssignals sowie die Wigner-Verteilung der Impulsantwort des linearen zeitinvarianten Lichtquantenleiters. Daraus ergibt sich ein neues Übertragungsverfahren auf der Grundlage der Wigner-Übertragungsgleichung als spezielles Faltungsintegral. Abschließend sind Methoden der Signal-Rekonstruktion dargestellt.
Wiki Writing: Collaborative Learning in the College Classroom
by Cummings Matt Robert E. BartonWhen most people think of wikis, the first---and usually the only---thing that comes to mind is Wikipedia. The editors ofWiki Writing: Collaborative Learning in the College Classroom, Robert E. Cummings and Matt Barton, have assembled a collection of essays that challenges this common misconception, providing an engaging and helpful array of perspectives on the many pressing theoretical and practical issues that wikis raise. Written in an engaging and accessible manner that will appeal to specialists and novices alike,Wiki Writingdraws on a wealth of practical classroom experiences with wikis to offer a series of richly detailed and concrete suggestions to help educators realize the potential of these new writing environments. Robert E. Cummings began work at Columbus State University in August 2006 as Assistant Professor of English and Director of First-Year Composition. Currently he also serves as the Writing Specialist for CSU's Quality Enhancement Plan, assisting teachers across campus in their efforts to maximize student writing in their curriculum. He recently concluded a three-year research study with the Inter/National Coalition for Electronic Portfolio Research and continues to research in the fields of computers and writing, writing across the curriculum, writing in the disciplines, and curricular reform in higher education. Matt Barton is Assistant Professor, St. Cloud State University, Department of English-Rhetoric and Applied Writing Program. His research interests are rhetoric, new media, and computers and writing. He is the author ofDungeons and Desktops: A History of Computer Role-Playing Gamesand has published in the journalsText and Technology,Computers and Composition,Game Studies, andKairos. He is currently serving as Associate Editor ofKairosnewsand Managing Editor ofArmchair Arcade. "Wiki Writingwill quickly become the standard resource for using wikis in the classroom. " ---Jim Kalmbach, Illinois State Universitydigitalculturebooks is an imprint of the University of Michigan Press and the Scholarly Publishing Office of the University of Michigan Library dedicated to publishing innovative and accessible work exploring new media and its impact on society, culture, and scholarly communication. Visit the website at www. digitalculture. org .
WikiLeaks: Inside Julian Assange's War on Secrecy
by David Leigh Luke HardingA team of journalists with unparalleled inside access provides the first full, in-depth account of WikiLeaks, its founder Julian Assange, and the ethical, legal, and political controversies it has both uncovered and provoked.
Wikinomics
by Don Tapscott Anthony D. WilliamsThe acclaimed bestseller that's teaching the world about the power of mass collaboration. Translated into more than twenty languages and named one of the best business books of the year by reviewers around the world, Wikinomics has become essential reading for business people everywhere. It explains how mass collaboration is happening not just at Web sites like Wikipedia and YouTube, but at traditional companies that have embraced technology to breathe new life into their enterprises. This national bestseller reveals the nuances that drive wikinomics, and share fascinating stories of how masses of people (both paid and volunteer) are now creating TV news stories, sequencing the human gnome, remixing their favorite music, designing software, finding cures for diseases, editing school texts, inventing new cosmetics, and even building motorcycles.
Wikipedia @ 20: Stories of an Incomplete Revolution
by Joseph Reagle and Jackie KoernerWikipedia's first twenty years: how what began as an experiment in collaboration became the world's most popular reference work.We have been looking things up in Wikipedia for twenty years. What began almost by accident--a wiki attached to an nascent online encyclopedia--has become the world's most popular reference work. Regarded at first as the scholarly equivalent of a Big Mac, Wikipedia is now known for its reliable sourcing and as a bastion of (mostly) reasoned interaction. How has Wikipedia, built on a model of radical collaboration, remained true to its original mission of "free access to the sum of all human knowledge" when other tech phenomena have devolved into advertising platforms? In this book, scholars, activists, and volunteers reflect on Wikipedia's first twenty years, revealing connections across disciplines and borders, languages and data, the professional and personal.
Wikipedia Reader's Guide: The Missing Manual
by John BroughtonYou don't have to understand how to edit Wikipedia in order to find the information you need and join the conversation. This booklet gives you just what you need to know in friendly, concise form so you can research any subject without getting lost in Wikipedia's labyrinth. With it, you'll be able to unlock the mysteries of the many links on every Wikipedia page and the sometimes cryptic buzzwords you see on Talk pages.And, while this booklet focuses on Wikipedia readers, it also includes a tutorial for first-time editors and explains Wikipedia's editing tools. You'll find valuable advice on how to alert editors to flaws in articles and how to contribute to Talk pages without getting caught up in pointless disputes.The author of Wikipedia Reader's Guide: The Missing Manual has edited more than 15,000 Wikipedia articles, and has written a comprehensive index to Wikipedia for editors to use in their daily work. His knowledge of Wikipedia is limitless and his passion is contagious. With this guide, you'll catch on quickly.
Wikipedia and the Politics of Openness
by Nathaniel TkaczFew virtues are as celebrated in contemporary culture as openness. Rooted in software culture and carrying more than a whiff of Silicon Valley technical utopianism, openness--of decision-making, data, and organizational structure--is seen as the cure for many problems in politics and business. But what does openness mean, and what would a political theory of openness look like? With Wikipedia and the Politics of Openness, Nathaniel Tkacz uses Wikipedia, the most prominent product of open organization, to analyze the theory and politics of openness in practice--and to break its spell. Through discussions of edit wars, article deletion policies, user access levels, and more, Tkacz enables us to see how the key concepts of openness--including collaboration, ad-hocracy, and the splitting of contested projects through "forking”--play out in reality. The resulting book is the richest critical analysis of openness to date, one that roots media theory in messy reality and thereby helps us move beyond the vaporware promises of digital utopians and take the first steps toward truly understanding what openness does, and does not, have to offer.
Wikipedia: The Missing Manual
by John BroughtonWant to be part of the largest group-writing project in human history? Learn how to contribute to Wikipedia, the user-generated online reference for the 21st century. Considered more popular than eBay, Microsoft.com, and Amazon.com, Wikipedia servers respond to approximately 30,000 requests per second, or about 2.5 billion per day. It's become the first point of reference for people the world over who need a fact fast.If you want to jump on board and add to the content, Wikipedia: The Missing Manual is your first-class ticket. Wikipedia has more than 9 million entries in 250 languages, over 2 million articles in the English language alone. Each one is written and edited by an ever-changing cast of volunteer editors. You can be one of them. With the tips in this book, you'll quickly learn how to get more out of -- and put more into -- this valuable online resource.Wikipedia: The Missing Manual gives you practical advice on creating articles and collaborating with fellow editors, improving existing articles, and working with the Wikipedia community to review new articles, mediate disputes, and maintain the site. Up to the challenge? This one-of-a-kind book includes:Basic editing techniques, including the right and wrong ways to editPinpoint advice about which types of articles do and do not belong on WikipediaWays to learn from other editors and communicate with them via the site's talk pagesTricks for using templates and timesaving automated editing toolsRecommended procedures for fighting spam and vandalismGuidance on adding citations, links, and images to your articlesWikipedia depends on people just like you to help the site grow and maintain the highest quality. With Wikipedia: The Missing Manual, you get all the tools you need to be part of the crew.
Wild Nights Out: The Magic of Exploring the Outdoors After Dark
by Chris Salisbury"A fun, inventive adventure guide about helping children explore nature after dark . . . Its activities are a great excuse to turn off the television, set down smartphones, and explore the rich, mysterious world just beyond the back door."—Foreword Reviews The go-to guide for exploring nature at night, whether on summer holidays, weekends away or even back garden adventures! Foreword by Chris Packham, author, naturalist, and BBC presenter Learn how to call for owls, walk like a fox and expand your sensory perceptions. Wild Nights Out is a wonderful new hands-on guide for those who wish to take kids (of all ages) outdoors for fun, thrilling nighttime nature adventures. Parents, grandparents, teachers and nature educators alike will discover a wealth of unique activities to explore the natural world from dusk till dawn. Alongside games, walks and exercises to expand our senses, storyteller and outdoor educator Chris Salisbury will bring this unexplored nocturnal dimension to life with lore about badgers, bats and minibeasts as well as tales of the constellations and planets to share around the campfire. In Wild Nights Out you can expect to find: 25 fun and informative games and activities Practical information on how to conduct night walks safely Animal facts and stargazing stories Beautiful black-and-white illustrations throughout Nature has so much to offer at night, so let Wild Nights Out be your guide to the dark. It will boost the resilience and self-confidence of children and adults, and instill a lifelong love of having fun in the outdoors when the sun goes down.
Will Self and Contemporary British Society
by G. MatthewsThis stimulating and comprehensive study of Will Self's work spans his entire career and offers insightful readings of all his fictional and non-fictional work up to and including his Booker prize nominated novel Umbrella.