Техническая литература
Различные книги в жанре Техническая литератураImplementing Voice over IP
Public and private networks will eventually be configured in such a way that all voice calls are routed using Internet protocols Reviews existing and emerging standards for voice over IP Provides detailed guidance on how to engineer an efficient VoIP network Discusses quality of service (QoS) enforcement techniques Shows how to prototype and test a network's performance
Next Generation Wireless Applications
Cuts through the hype! Golding's compelling offers visionary, but practical insights. A must have" reference treatment for all practitioners in the mobile innovation space." —Jag Minhas, Telefónica O2 Europe Second edition of this best-selling guide to Wireless Applications: fully revised, updated and with brand new material! In Next Generation Wireless Applications, Second Edition, the author establishes a picture of the entire mobile application ecosystem, and explains how it all fits together. This edition builds upon the successes of the first edition by offering an up-to-date holistic guide to mobile application development, including an assessment of the applicability of new mobile applications, and an exploration into the developments in a number of areas such as Web 2.0, 3G, Mobile TV, J2ME (Java 2 Micro Edition) and many more. Key features of this second edition include: New introductory chapters on trends in mobile application, and on becoming an Operator. Two new chapters on Mobile 2.0 and IMS and Mobilizing Media and TV. Extra material on convergence, Web 2.0, AJAX (Asynchronous JavaScript and XML), HSDPA (High Speed Downlink Packet Access) and MBMS (Multimedia Broadcast Multicast Service), WiMAX (Worldwide Interoperability for Microwave Access) and WiFi. Best practice on how to present to, sell to and work with operators. More insights, anecdotes and sidebars reflecting the author's extensive experience in the industry. Next Generation Wireless Applications will prove essential reading for professionals in mobile operator and mobile application developing companies, web developers, and developer community managers. Media companies, general managers, business analysts, students, business consultants, and Java developers will also find this book captivating. «If you want to understand the future of mobile applications and services, their potential impact and the growth opportunities this is the perfect starting point.» —Martin Smith, Head of Content Innovation & Applications, T-Mobile
Wireless Personal Area Networks
Wireless Personal Area Networks provides an in-depth analysis of the recent IEEE 802.15.4 standard for low data rate wireless personal area networks (LR-WPANs), including suggestions to improve performance and comparisons with the related 802.15.1 (Bluetooth) standard. It assesses the suitability of the standard for the development and deployment of wireless sensor networks as well as providing guidance and insight into the relative advantages and disadvantages of various performance solutions. Wireless Personal Area Networks: Provides a comprehensive, in-depth look at the issues surrounding WPAN network operation and performance. Investigates multi-cluster networks and compares how they can be implemented. Analyzes the performance of a single cluster under different traffic and power management regimes including uplink vs. downlink traffic, acknowledged vs. unacknowledged traffic, saturation vs. non-saturation, and the like. Discusses security issues in WPANs such as different security threats, their impact on performance, standard security mechanisms, and security policies. Compares the IEEE 802.15.4 standard with the related Bluetooth IEEE 802.15.1 standard in terms of suitability for implementing wireless sensor networks. This reference is a valuable tool for developers and researchers getting acquainted with various aspects of IEEE 802.15.4 technology. Graduate students studying courses such as Performance Evaluation, Wireless Sensor Networks and Queuing Theory will also find this book very insightful.
Mobile Communications Design Fundamentals
Revised and enlarged version that discusses how to design a mobile communications system. Comprehensively examines the mobile radio environment. Covers prediction of propagation loss, calculation and methods of reducing fades, interference, frequency plans and associated schemes, design parameters, signaling and channel access, cellular CDMA, microcell systems, and miscellaneous related systems. Contains chapter-by-chapter references and problems.
Ultra-wideband Radio Technology
Ultra-wideband (UWB) has been among the most controversial technologies of modern times. Its applications seem endless, its capabilities miraculous and yet it is so poorly understood. In this volume, the authors combine talents to de-mystify ultra-wideband radio and explain it in language that is accessible to non-technologists as well as technologists. They contrast UWB with conventional radio technology so that fundamental, technically accurate information devoid of specific technical and analytical details is accessible for marketing managers, business developers, engineering managers, technology managers, potential investors, financial analysts, executive recruiters, technical writers, and technologists from other fields. The authors also include enough specific technical and engineering information about UWB, for the seasoned technologists, engineers, scientists and academicians who need to understand the topic at an entry level. Provides simple high level, conceptual discussions of UWB followed with more detailed, scientific, mathematical, engineering focused explanations Presents a global perspective by tracing UWB throughout the history of radio, providing a modern basis for the re-emergence of the technology and for the current regulatory and standards activities Features insights into the reasons why the technology developed the way it did Explains the key advantages of UWB, including its bandwidth, potential simplicity and huge system capacity Discusses the applications of UWB in terms of the unique properties and advantages of UWB Ultra-wideband Radio Technology will inform, educate and inspire!…
Towards the Semantic Web
With the current changes driven by the expansion of the World Wide Web, this book uses a different approach from other books on the market: it applies ontologies to electronically available information to improve the quality of knowledge management in large and distributed organizations. Ontologies are formal theories supporting knowledge sharing and reuse. They can be used to explicitly represent semantics of semi-structured information. These enable sophisticated automatic support for acquiring, maintaining and accessing information. Methodology and tools are developed for intelligent access to large volumes of semi-structured and textual information sources in intra- and extra-, and internet-based environments to employ the full power of ontologies in supporting knowledge management from the information client perspective and the information provider. The aim of the book is to support efficient and effective knowledge management and focuses on weakly-structured online information sources. It is aimed primarily at researchers in the area of knowledge management and information retrieval and will also be a useful reference for students in computer science at the postgraduate level and for business managers who are aiming to increase the corporations' information infrastructure. The Semantic Web is a very important initiative affecting the future of the WWW that is currently generating huge interest. The book covers several highly significant contributions to the semantic web research effort, including a new language for defining ontologies, several novel software tools and a coherent methodology for the application of the tools for business advantage. It also provides 3 case studies which give examples of the real benefits to be derived from the adoption of semantic-web based ontologies in «real world» situations. As such, the book is an excellent mixture of theory, tools and applications in an important area of WWW research. * Provides guidelines for introducing knowledge management concepts and tools into enterprises, to help knowledge providers present their knowledge efficiently and effectively. * Introduces an intelligent search tool that supports users in accessing information and a tool environment for maintenance, conversion and acquisition of information sources. * Discusses three large case studies which will help to develop the technology according to the actual needs of large and or virtual organisations and will provide a testbed for evaluating tools and methods. The book is aimed at people with at least a good understanding of existing WWW technology and some level of technical understanding of the underpinning technologies (XML/RDF). It will be of interest to graduate students, academic and industrial researchers in the field, and the many industrial personnel who are tracking WWW technology developments in order to understand the business implications. It could also be used to support undergraduate courses in the area but is not itself an introductory text.
Managing Service Level Quality
QoS (Quality of Service) and Network Management are old topics. However, the fusion of IP style multimedia and wireless networks (3G) means that network managers who might previously have dealt with one or the other, must now manage and provide service guarantees for the both. This is where Managing Service Level Quality across Wireless and Fixed Networks steps in… It begins by examining the mechanisms that already existed in fixed IP data networks prior to the introduction of probe and agent technology. A look at these later developments is then supplemented with a real-world scenario of how real time application performance monitoring can not only provide service level management but can also aid in root cause analysis. This same model is then applied to a wireless environment examining which elements are required to be able to deliver multimedia services across 2nd and 3rd generation mobile networks, detailing the components of data networking that will assist in guaranteeing service level performance and the constraints placed on those guarantees when passing services over an air interface to a wireless-enabled device. It asks a simple question: will multimedia applications and the guaranteed levels of service required by them work when traversing from fixed to wireless networks? It tracks QoS components and mechanisms of both environments and looks at what will provide the glue in this brave new converged world and also provides empirical data to back up the conclusions drawn. * First book available which applies QoS techniques and technologies to wireless/mobile networks 3G/UMTS * Deals with the search for the real time information that constitutes the «customer experience» in terms of application performance so that service levels can be verified against measurable and relevant data in a true end-to-end manner across both fixed and wireless networks * Presents probe and agent technology * Features a real-world scenario of how real time application performance monitoring can not only provide service level management but can also aid in root cause analysis – this will be of particular interest to practitioner * Analyses which elements are required in order to deliver multimedia services across 2nd and 3rd generation mobile networks * Details the components of data networking that will assist in guaranteeing service level performance Essential reading for Wireless and IP data network professionals/practitioners, network managers and architects, technical consultants, quality assessment engineers, infrastructure vendors, application developers, portal designers, wireline operators, lecturers, postgraduates, senior undergraduate students and industry trainees.
Professional Content Management Systems
Content and Content Management are core topics in the IT and broadcast industry. However these terms have not been clearly defined for those learning the field. The topic is complex and users from different industries have different backgrounds and a varied understanding of content issues. Multimedia Content Management helps to clarify the subject area, define problematic issues and establish a universal understanding of content and its management. * Provides clarity in the subject area * Defines potential problems and establishes a universal understanding * Builds an architectural framework upon this account and different aspects of the industry and solutions are reviewed * Comprehensively describes the different users working and accessing content, the applications and workflows Essential reading for students, engineers and technical managers, in the area of data, storage management and multimedia, requiring an overview of this complex topic. The topics discussed will also prove highly insightful for executive managers and media professionals with a technical understanding and broadcast executives in the field.
Mobile Satellite Communication Networks
Mobile satellite services are set to change with the imminent launch of satellite personal communication services (S-PCS), through the use of non-geostationary satellites. This new generation of satellites will be placed in low earth orbit or medium earth orbit, hence, introducing new satellite design concepts. One of the first texts to cover this rapidly evolving field, this text provides the reader with an overview of mobile satellite systems, from their initial introduction (Inmarsat), current satellite-PCS (referring to such systems as Globalstar), through to Satellite-UMTS and an understanding of the following: * The design concepts associated with non-geostationary satellite systems (constellation, link budgets, Doppler) * The concepts of UMTS (network architecture, aims, in the context of IMT-2000) and the role foreseen for the satellite component (complementary to terrestrial network, network extension, global availability) * Inter-working between satellite and terrestrial networks (network architecture, ATM Adaptation Layer) * Radio interface technologies (WB-CDMA, TDMA, transmission environment) * Regulatory issues * Future services and applications * Potential satellite markets (prediction techniques, effect of tariffing policies on potential market) With leading edge information, this valuable resource will be indispensable to researchers, engineers, operators and market evaluators in satellite service industries and research institutions, as well as postgraduates and research students in the field.
Wireless Communications Resource Management
Wireless technologies continue to evolve to address the insatiable demand for faster response times, larger bandwidth, and reliable transmission. Yet as the industry moves toward the development of post 3G systems, engineers have consumed all the affordable physical layer technologies discovered to date. This has necessitated more intelligent and optimized utilization of available wireless resources. Wireless Communications Resource Managem ent, Lee, Park, and Seo cover all aspects of this critical topic, from the preliminary concepts and mathematical tools to detailed descriptions of all the resource management techniques. Readers will be able to more effectively leverage limited spectrum and maximize device battery power, as well as address channel loss, shadowing, and multipath fading phenomena. Presents the latest resource allocation techniques for new and next generation air interface technologies Arms readers with the necessary fundamentals and mathematical tools Illustrates theoretical concepts in a concrete manner Gives detailed coverage on scheduling, power management, and MIMO techniques Written by an author team working in both academia and industry Wireless Communications Resource Managementis geared for engineers in the wireless industry and graduate students specializing in wireless communications. Professionals in wireless service and device manufacturing industries will find the book to be a clear, up-to-date overview of the topic. Readers will benefit from a basic, undergraduate-level understanding of networks and communications. Course instructors can access lecture materials at the companion website:(www.wiley.com/go/bglee)