This book introduces an efficient resource management approach for future spectrum sharing systems. The book focuses on providing an optimal resource allocation framework based on carrier aggregation to allocate multiple carriers' resources efficiently among mobile users. Furthermore, it provides an optimal traffic dependent pricing mechanism that could be used by network providers to charge mobile users for the allocated resources. The book provides different resource allocation with carrier aggregation solutions, for different spectrum sharing scenarios, and compares them. The provided solutions consider the diverse quality of experience requirement of multiple applications running on the user's equipment since different applications require different application performance. In addition, the book addresses the resource allocation problem for spectrum sharing systems that require user discrimination when allocating the network resources.

This book describes the design and implementation of Cloud Armor, a novel approach for credibility-based trust management and automatic discovery of cloud services in distributed and highly dynamic environments. This book also helps cloud users to understand the difficulties of establishing trust in cloud computing and the best criteria for selecting a service cloud. The techniques have been validated by a prototype system implementation and experimental studies using a collection of real world trust feedbacks on cloud services. The authors present the design and implementation of a novel protocol that preserves the consumers' privacy, an adaptive and robust credibility model, a scalable availability model that relies on a decentralized architecture, and a cloud service crawler engine for automatic cloud services discovery. This book also analyzes results from a performance study on a number of open research issues for trust management in cloud environments including distribution of providers, geographic location and languages. These open research issues illustrate both an overview of the current state of cloud computing and potential future directions for the field. Trust Management in Cloud Services contains both theoretical and applied computing research, making it an ideal reference or secondary text book to both academic and industry professionals interested in cloud services. Advanced-level students in computer science and electrical engineering will also find the content valuable.

ISGC 2009, The International Symposium on Grid Computing was held at Academia Sinica, Taipei, Taiwan in April 2009 bringing together prestigious scientists and engineers worldwide to exchange ideas, present challenges/solutions and introduce future development in the field of Grid Computing. Managed Grids and Cloud Systems in the Asia-Pacific Research Community presents the latest achievements in grid technology including Cloud Computing. This volume also covers international projects in Grid Operation, Grid Middleware, E-Science applications, technical developments in grid operations and management, Security and Networking, Digital Library and more. The resources used to support these advances, such as volunteer grids, production managed grids, and cloud systems are discussed in detail. This book is designed for a professional audience composed of grid users, developers and researchers working in the grid computing. Advanced-level students focusing on computer science and engineering will find this book valuable as a reference or secondary text book.

In a knowledge economy urban form and functions are primarily shaped by global market forces rather than urban planning. As the role of knowledge in wealth creation becomes a critical issue in cities, urban administrations and planners need to discover new approaches to harness the considerable opportunities of abstract production for a global order. ""Creative Urban Regions"" explores the utilization of urban technology to support knowledge city initiatives, providing scholars and practitioners with essential fundamental techniques and processes for the successful integration of information technologies and urban production. Converging timely research on a multitude of cutting-edge urban information communication technology issues, this ""Premier Reference Source"" will make a valuable addition to every reference library.

Have you ever tried to figure out why your computer clock is off, or why your emails somehow have the wrong timestamp? Most likely, its due to an incorrect network time synchronization, which can be reset using the Network Time Protocol. Until now, most network administrators have been too paranoid to work with this, afraid that they would make the problem even worse. However, Expert Network Time Protocol: An Experience in Time with NTP takes the mystery out of time, and shows the network administrator how to regain the upper hand.

This book is a fascinating look into NTP, and the stories behind the science. Written by Peter Rybaczyk, one of the foremost experts on NTP, this book will show the Network Administrator how to become more comfortable working with time.-->Table of Contents-->Multiple Views of TimeNetwork Administration and IT Trends Throughout History!NTP Operational, Historical, and Futuristic OverviewNTP ArchitectureNTP Design, Configuration, and Troubleshooting

MPLS-enabled networks are enjoying tremendous growth, but practical information on managing MPLS-enabled networks has remained hard to find. Until now.
MPLS Network Management: MIBs, Tools, and Techniques is the first and only book that will help you master MPLS management technologies and techniques, as they apply to classic MPLS networks, traffic-engineered networks, and VPNs. Written by the co-author of most current MPLS management standards, it provides detailed, authoritative coverage of official MIBs, examining key topics ranging from syntax to access levels to object interaction. It also offers extensive consideration of third-party management interfaces, including tools for metering traffic and predicting traffic growth and behavior. If you're a network operator, network device engineer, or MPLS application developer, you need this book to get all you can out of all of MPLS's many capabilities.
* The only book devoted entirely to the tools and techniques for controlling, monitoring, debugging, and optimizing MPLS-enabled networks.
* Authoritative information from the co-author of most IETF MIBs relating to MPLS and GMPLS, PWE3, and PPVPN.
* Covers both standards-based and proprietary management technologies.
* Includes interviews with seminal figures in the development of MPLS.
* Via a companion web site, provides information on late-breaking developments in MPLS management and links to additional resources.
* To be followed by a second volume presenting best-practice case studies dealing with how real companies approach the management of their MPLS networks.

This dictionary is a collection of technical abbreviations and acronyms used in information and communication technologies and other industrial activities. They are used in industries, institutes, organisations and universities, all too often without mentioning their meaning. Areas covered by this dictionary are Information and Communication Technology (ICT), including hardware and software; Information Networks, including the Internet and the World Wide Web; Automatic Control; and ICT-related Computer-Aided Techniques and Activities. Apart from the technical terms this dictionary also lists abbreviated names of relevant organisations, conferences, symposia and workshops. This reference book is important for all practitioners and users in the areas mentioned above and those who consult or write technical material (manuals, guides, books, articles, marketing and teaching material). These publications often omit the meaning of acronyms and confront the reader with jargon too often difficult to understand. This edition contains over 33,000 items and differs from the previous one by deleting obsolete terms and less relevant acronyms. Ten thousand new items have been added.

The primary objective of this book is to teach the architectures, design principles, and troubleshooting techniques of a LAN. This will be imparted through the presentation of a broad scope of data and computer communication standards, real-world inter-networking techniques, architectures, hardware, software, protocols, technologies and services as they relate to the design, implementation and troubleshooting of a LAN. The logical and physical design of hardware and software is not the only process involved in the design and implementation of a LAN. The latter also encompasses many other aspects including making the business case, compiling the requirements, choosing the technology, planning for capacity, selecting the vendor, and weighing all the issues before the actual design begins.

Software design is becoming increasingly complex and difficult as we move to applications that support people interacting with information and with each other over networks. Computer supported cooperative work applications are a typical example of this. The problems to be solved are no longer just technical, they are also social: how do we build systems that meet the real needs of the people who are asked to use them and that fit into their contexts of use. We can characterise these as wicked problems, where our traditional software engineering techniques for understanding requirements and driving these through into design are no longer adequate.

This book presents the Locales Framework - and its five aspects of locale foundations, civic structures, individual views, interaction trajectory and mutuality - as a way of dealing with the intertwined problem-solution space of wicked problems. A locale is based on a metaphor of place as the lived relationship between people and the spaces and resources they use in their interactions. The Locales Framework provides a coherent mediating framework for ethnographers, designers, and software engineers to facilitate both understanding requirements of complex social situations and designing solutions to support these situations in all their complexity.

This book gives an overview of constraint satisfaction problems (CSPs), adapts related search algorithms and consistency algorithms for applications to multi-agent systems, and consolidates recent research devoted to cooperation in such systems. The techniques introduced are applied to various problems in multi-agent systems. Among the new approaches is a hybrid-type algorithm for weak-commitment search combining backtracking and iterative improvement; also, an extension of the basic CSP formalization called partial CSP is introduced in order to handle over-constrained CSPs.The book is written for advanced students and professionals interested in multi-agent systems or, more generally, in distributed artificial intelligence and constraint satisfaction. Researchers active in the area will appreciate this book as a valuable source of reference.

This book describes the struggle to introduce a mechanism that enables next-generation information systems to maintain themselves. Our generation observed the birth and growth of information systems, and the Internet in particular. Surprisingly information systems are quite different from conventional (energy, material-intensive) artificial systems, and rather resemble biological systems (information-intensive systems). Many artificial systems are designed based on (Newtonian) physics assuming that every element obeys simple and static rules; however, the experience of the Internet suggests a different way of designing where growth cannot be controlled but self-organized with autonomous and selfish agents. This book suggests using game theory, a mechanism design in particular, for designing next-generation information systems which will be self-organized by collective acts with autonomous components. The challenge of mapping a probability to time appears repeatedly in many forms throughout this book. The book contains interdisciplinary research encompassing game theory, complex systems, reliability theory and particle physics. All devoted to its central theme: what happens if systems self-repair themselves?

Despite the complexity of the subject, this wealth of information is presented succinctly and in such a way, using tables, diagrams and brief explanatory text, as to allow the user to locate information quickly and easily. Thus the book should be invaluable to those involved with the installation, commissioning and maintenance of data communications equipment, as well as the end user.
*A practical engineer's reference that puts the key information at your fingertips
*Covers essential data, techniques and working practice
*This update covers the latest international regulations

Brings you up to speed on mobile data system design, current and emerging wireless network and systems standards, and network architectures. Describes mobile data applications and wireless LANs, and analyzes and evaluates current technologies.

Safety is a paradoxical system property. It remains immaterial, intangible and invisible until a failure, an accident or a catastrophy occurs and, too late, reveals its absence. And yet, a system cannot be relied upon unless its safety can be explained, demonstrated and certified. The practical and difficult questions which motivate this study concern the evidence and the arguments needed to justify the safety of a computer based system, or more generally its dependability. Dependability is a broad concept integrating properties such as safety, reliability, availability, maintainability and other related characteristics of the behaviour of a system in operation. How can we give the users the assurance that the system enjoys the required dependability? How should evidence be presented to certification bodies or regulatory authorities? What best practices should be applied? How should we decide whether there is enough evidence to justify the release of the system? To help answer these daunting questions, a method and a framework are proposed for the justification of the dependability of a computer-based system. The approach specifically aims at dealing with the difficulties raised by the validation of software. Hence, it should be of wide applicability despite being mainly based on the experience of assessing Nuclear Power Plant instrumentation and control systems important to safety. To be viable, a method must rest on a sound theoretical background.

The telecommunications industry is experiencing a worldwide explosion of growth as few other industries ever have. However, as recently as a decade ago, the bulk of telecommunications services were delivered by the traditional telephone network, for which design and analysis principles had been under steady development for over three-quarters of a century. This environment was characterized by moderate and steady growth, with an accompanying slower development of new network equipment and standardization processes. In such a near-static environment, attention was given to optimization techniques to squeeze out better profits from existing and limited future investments. To this end, forecasts of network services were developed on a regular planning cycle and networks were optimized accordingly, layer by layer, for cost-effective placement of capacity and efficient utilization. In particular, optimization was based on a fairly stable set of assumptions about the network architecture, equipment models, and forecast uncertainty. This special edition is devoted to heuristic approaches for telecommunications network management, planning, and expansion. We hope that this collection brings to the attention of researchers and practitioners an array of techniques and case studies that meet the stringent time to market' requirements of this industry and which deserve exposure to a wider audience. Telecommunications will face a tremendous challenge in the coming years to be able to design, build, and manage networks in such a rapidly evolving industry. Development and application of heuristic methods will be fundamental in our ability to meet this challenge.

Over one billion people access the Internet worldwide, and new problems of language, security, and culture accompany this new excess in access. Computer-Mediated Communication across Cultures: International Interactions in Online Environments provides readers with the foundational knowledge needed to communicate safely and effectively with individuals from other countries and cultures via online media. Through a closer examination of the expanded global access to the Web, this book discusses the use and design of cross-cultural digital media and the future of the field for executives, marketers, researchers, educators, and the average user.

To optimally design and manage a directory service, IS architects and managers must understand current state-of-the-art products. Directory Services covers Novell's NDS eDirectory, Microsoft's Active Directory, UNIX directories and products by NEXOR, MaxWare, Siemens, Critical Path and others. Directory design fundamentals and products are woven into case studies of large enterprise deployments. Cox thoroughly explores replication, security, migration and legacy system integration and interoperability. Business issues such as how to cost justify, plan, budget and manage a directory project are also included. The book culminates in a visionary discussion of future trends and emerging directory technologies including the strategic direction of the top directory products, the impact of wireless technology on directory enabled applications and using directories to customize content delivery from the Enterprise Portal.
Directory Services is a comprehensive and practical guide that provides organizations and consultants with a roadmap used to create the directory enabled global enterprise. To provide the reader with the core knowledge required for designing directory services, the book discusses directory fundamentals including X.500, X.509 and LDAP as well as how to cost justify, plan, budget and manage a directory project
Provides critical info for design, integration, or migration for multiple messaging platforms
Covers all major directories
Provides case studies and guidelines for deployment and integration issues

The Palm theory and the Loynes theory of stationary systems are the two pillars of the modern approach to queuing. This book, presenting the mathematical foundations of the theory of stationaryqueuing systems, contains a thorough treatment of both of these.

This approach helps to clarify the picture, in that it separates the task of obtaining the key system formulas from that of proving convergence to a stationary state and computing its law.

The theory is constantly illustrated by classical results and models: Pollaczek-Khintchin and Tacacs formulas, Jackson and Gordon-Newell networks, multiserver queues, blocking queues, loss systems etc., but it also contains recent and significant examples, where the tools developed turn out to be indispensable.

Several other mathematical tools which are useful within this approach are also presented, such as the martingale calculus for point processes, or stochastic ordering for stationary recurrences.

This thoroughly revised second edition contains substantial additions - in particular, exercises and their solutions - rendering this now classic reference suitable for use as a textbook.

Data networking now plays a major role in everyday life and new applications continue to appear at a blinding pace. Yet we still do not have a sound foundation for designing, evaluating and managing these networks.

This book covers topics at the intersection of algorithms and networking. It builds a complete picture of the current state of research on Next Generation Networks and the challenges for the years ahead. Particular focus is given to evolving research initiatives and the architecture they propose and implications for networking.

Topics: Network design and provisioning, hardware issues, layer-3 algorithms and MPLS, BGP and Inter AS routing, packet processing for routing, security and network management, load balancing, oblivious routing and stochastic algorithms, network coding for multicast, overlay routing for P2P networking and content delivery.

This timely volume will be of interest to a broad readership from graduate students to researchers looking to survey recent research its open questions.

Computer Networks & Communications (NetCom) is the proceedings from the Fourth International Conference on Networks & Communications. This book covers theory, methodology and applications of computer networks, network protocols and wireless networks, data communication technologies, and network security. The proceedings will feature peer-reviewed papers that illustrate research results, projects, surveys and industrial experiences that describe significant advances in the diverse areas of computer networks & communications.

In this book the author examines 60 GHz and conventional UWB. The book introduces the fundamentals, architectures, and applications of unified ultra wideband devices. The material includes both theory and practice and introduces ultra wideband communication systems and their applications in a systematic manner. The material is written to enable readers to design, analyze, and evaluate UWB communication systems.

Software Defined Radio makes wireless communications easier, more efficient, and more reliable. This book bridges the gap between academic research and practical implementation. When beginning a project, practicing engineers, technical managers, and graduate students can save countless hours by considering the concepts presented in these pages.The author covers the myriad options and trade-offs available when selecting an appropriate hardware architecture.As demonstrated here, the choice between hardware- and software-centric architecture can mean the difference between meeting an aggressive schedule and bogging down in endless design iterations.Because of the author's experience overseeing dozens of failed and successful developments, he is able to present many real-life examples.Some of the key concepts covered are: Choosing the right architecture for the market - laboratory, military, or commercial, Hardware platforms - FPGAs, GPPs, specialized and hybrid devices, Standardization efforts to ensure interoperability and portabilitym State-of-the-art components for radio frequency, mixed-signal, and baseband processing.

The text requires only minimal knowledge of wireless communications; whenever possible, qualitative arguments are used instead of equations.An appendix provides a quick overview of wireless communications and introduces most of the concepts the readers will need to take advantage of the material.An essential introduction to SDR, this book is sure to be an invaluable addition to any technical bookshelf."

This book describes state-of-the-art approaches to Fog Computing, including the background of innovations achieved in recent years. Coverage includes various aspects of fog computing architectures for Internet of Things, driving reasons, variations and case studies. The authors discuss in detail key topics, such as meeting low latency and real-time requirements of applications, interoperability, federation and heterogeneous computing, energy efficiency and mobility, fog and cloud interplay, geo-distribution and location awareness, and case studies in healthcare and smart space applications.

Advanced Wired and Wireless Networks brings the reader a sample of recent research efforts representative of advances in the areas of recognized importance for the future Internet, such as ad hoc networking, mobility support and performance improvements in advanced networks and protocols.

Advanced Wired and Wireless Networks is structured to meet the needs of a professional audience in industry, as well as graduate-level students in computer science and engineering.