Download or read book Simulcasting Using Slotted ALOHA in Ad hoc Networks written by Kiung Jung and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Previous studies used unequal error-protection techniques to improve the throughput of a wireless communication system in which a transmission is received by several radios with different capabilities. These capabilities may correspond to differences in path loss, fading, or interference. By taking advantage of the broadcast nature of the channel, additional messages for the more-capable receivers can be included on transmissions to the less-capable receivers at little cost (in terms of required energy at the transmitter or error probabilities at the receivers). This technique has been termed simulcasting or multicast signaling. We consider this technique in an ad hoc network. This technique impacts link throughput, end-to-end throughput, and network connectivity. First, we investigated the basic properties of simulcasting, including how the choice of parameters for the simulcasting technique affects several key network performance metrics. The results show that a properly chosen simulcasting technique can improve the link and end-to-end throughput in ad hoc wireless networks with only a slight degradation in other metrics such as connectivity. Next, we propose cross-layer techniques for unequal resource allocation to improve network performance when using simulcasting. We then propose to allocate the channel more often to radios that can simulcast. This unequal channel access is achieved by a simple modification to the back-off parameter in the MAC algorithm. We then consider the distribution of traffic over multiple routes according to the simulcasting capabilities of the radios along the routes. Finally, we propose schemes to adapt the transmit power and signal constellation shape based on the channel conditions to the intended receivers. Results show that these cross-layer approaches effectively enhance the performance of simulcasting in wireless ad hoc networks.

Download or read book Conference Record written by and published by . This book was released on 2003 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wireless Communications written by Andreas F. Molisch and published by John Wiley & Sons. This book was released on 2012-02-06 with total page 883 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Professor Andreas F. Molisch, renowned researcher and educator, has put together the comprehensive book, Wireless Communications. The second edition, which includes a wealth of new material on important topics, ensures the role of the text as the key resource for every student, researcher, and practitioner in the field." —Professor Moe Win, MIT, USA Wireless communications has grown rapidly over the past decade from a niche market into one of the most important, fast moving industries. Fully updated to incorporate the latest research and developments, Wireless Communications, Second Edition provides an authoritative overview of the principles and applications of mobile communication technology. The author provides an in-depth analysis of current treatment of the area, addressing both the traditional elements, such as Rayleigh fading, BER in flat fading channels, and equalisation, and more recently emerging topics such as multi-user detection in CDMA systems, MIMO systems, and cognitive radio. The dominant wireless standards; including cellular, cordless and wireless LANs; are discussed. Topics featured include: wireless propagation channels, transceivers and signal processing, multiple access and advanced transceiver schemes, and standardised wireless systems. Combines mathematical descriptions with intuitive explanations of the physical facts, enabling readers to acquire a deep understanding of the subject. Includes new chapters on cognitive radio, cooperative communications and relaying, video coding, 3GPP Long Term Evolution, and WiMax; plus significant new sections on multi-user MIMO, 802.11n, and information theory. Companion website featuring: supplementary material on 'DECT', solutions manual and presentation slides for instructors, appendices, list of abbreviations and other useful resources.

Download or read book Wireless Sensor Networks written by Hossam Mahmoud Ahmad Fahmy and published by Springer. This book was released on 2016-03-02 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the principles of wireless sensor networks (WSNs), their applications, and their analysis tools, with meticulous attention paid to definitions and terminology. This book presents the adopted technologies and their manufacturers in detail, making WSNs tangible for the reader. In introductory computer networking books, chapter sequencing follows the bottom-up or top-down architecture of the 7-layer protocol. This book addresses subsequent steps in this process, both horizontally and vertically, thus fostering a clearer and deeper understanding through chapters that elaborate on WSN concepts and issues. With such depth, this book is intended for a wide audience; it is meant to be a helper and motivator for senior undergraduates, postgraduates, researchers, and practitioners. It lays out important concepts and WSN-relate applications; uses appropriate literature to back research and practical issues; and focuses on new trends. Senior undergraduate students can use it to familiarize themselves with conceptual foundations and practical project implementations. For graduate students and researchers, test beds and simulators provide vital insights into analysis methods and tools for WSNs. Lastly, in addition to applications and deployment, practitioners will be able to learn more about WSN manufacturers and components within several platforms and test beds.

Download or read book Multimedia Applications Services and Techniques ECMAST 99 written by Helmut Leopold and published by Springer Science & Business Media. This book was released on 1999-05-19 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 4th European Conference on Multimedia Applications, Services and Techniques, ECMAST'99, held in Madrid, Spain in May 1999. The 37 revised full papers presented were carefully reviewed and selected from a total of 71 submissions. The book is divided in sections on services and applications, multimedia terminals, content creation, physical broadcast infrastructure, multimedia over the Internet, metadata, 3D imaging, multicast protocols, security and protection, and mobility.

Download or read book Mobile Communication Systems written by Krzysztof Wesołowski and published by John Wiley & Sons. This book was released on 2002-02-15 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mobile communication systems have become one of the hottest areas in the field of telecommunications and it is predicted that within the next decade a considerable number of connections will become partially or completely wireless. Rapid development of the Internet with its new services and applications has created fresh challenges for the further development of mobile communication systems. This volume presents an easy to follow overview of such systems ranging from introductory material through to a thorough system description. Provides the necessary background information on digital communication systems, such as speech and channel coding, digital modulations (including OFDM) and basic access protocols Presents the properties of a mobile radio channel and describes mobile radio propagation models Explains the concept of cellular systems and their design Covers GSM and IS-95 and reviews paging systems, first generation cellular systems, wireless telephony, trunking systems and wireless local loops Features HSCSD, GPRS, EDGE, UMTS and WLAN technologies Includes an introduction to smart antennas The extensive scope of Mobile Communication Systems ensures it will be a valuable reference for communication students and engineers wishing to learn about every aspect of this fascinating and fast evolving field.

Download or read book Principles Of Digital Communication System Computer Network written by K.V.K.K. Prasad and published by Dreamtech Press. This book was released on 2003-07-17 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Comprehensive coverage of Digital communication, Data Communication Protocols and Mobile ComputingCovers:" Multiplexing & Multiple accesses" Radio Communications- Terrestrial & Satellite" Error Detection & Correction" ISO/ OSI Protocol Architecture" Wired Internet DNS, RADIUS, Firewalls, VPN" Cellular Mobile Communication" GPS, CTI, Wireless Internet" Multimedia Communication over IP Networks

Download or read book Science Abstracts written by and published by . This book was released on 1995 with total page 1990 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wireless Communications Networks written by William Stallings and published by Pearson Higher Ed. This book was released on 2013-10-03 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: For courses in wireless networking, wireless communications, wireless data communications or wireless technology in departments of Computer Science, Engineering, IT, and Continuing Education. The rapid growth of mobile telephone use, satellite services, and the wireless Internet are generating tremendous changes in telecommunications and networking. Combining very current technical depth with a strong pedagogy and advanced Web support, this new edition provides a comprehensive guide to wireless technology–exploring key topics such as technology and architecture, network types, design approaches, and the latest applications. Visit Stallings Companion Website at http://williamstallings.com/CompSec/CompSec1e.html for student and instructor resources and his Computer Science Student Resource site http://williamstallings.com/StudentSupport.html Password protected instructor resources can be accessed here by clicking on the Resources Tab to view downloadable files. (Registration required) They include Power Point Slides, Solutions, tables and figures.

Download or read book Digital Microwave Communication written by George Kizer and published by John Wiley & Sons. This book was released on 2013-06-24 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book to cover all engineering aspects of microwave communication path design for the digital age Fixed point-to-point microwave systems provide moderate-capacity digital transmission between well-defined locations. Most popular in situations where fiber optics or satellite communication is impractical, it is commonly used for cellular or PCS site interconnectivity where digital connectivity is needed but not economically available from other sources, and in private networks where reliability is most important. Until now, no book has adequately treated all engineering aspects of microwave communications in the digital age. This important new work provides readers with the depth of knowledge necessary for all the system engineering details associated with fixed point-to-point microwave radio path design: the why, what, and how of microwave transmission; design objectives; engineering methodologies; and design philosophy (in the bid, design, and acceptance phase of the project). Written in an easily accessible format, Digital Microwave Communication features an appendix of specialized engineering details and formulas, and offers up chapter coverage of: A Brief History of Microwave Radio Microwave Radio Overview System Components Hypothetical Reference Circuits Multipath Fading Rain Fading Reflections and Obstructions Network Reliability Calculations Regulation of Microwave Radio Networks Radio Network Performance Objectives Designing and Operating Microwave Systems Antennas Radio Diversity Ducting and Obstruction Fading Digital Receiver Interference Path Performance Calculations Digital Microwave Communication: Engineering Point-to-Point Microwave Systems will be of great interest to engineers and managers who specify, design, or evaluate fixed point-to-point microwave systems associated with communications systems and equipment manufacturers, independent and university research organizations, government agencies, telecommunications services, and other users.

Download or read book System on Chip Interfaces for Low Power Design written by Sanjeeb Mishra and published by Morgan Kaufmann. This book was released on 2015-11-17 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: System on Chip Interfaces for Low Power Design provides a top-down understanding of interfaces available to SoC developers, not only the underlying protocols and architecture of each, but also how they interact and the tradeoffs involved. The book offers a common context to help understand the variety of available interfaces and make sense of technology from different vendors aligned with multiple standards. With particular emphasis on power as a factor, the authors explain how each interface performs in various usage scenarios and discuss their advantages and disadvantages. Readers learn to make educated decisions on what interfaces to use when designing systems and gain insight for innovating new/custom interfaces for a subsystem and their potential impact. Provides a top-down guide to SoC interfaces for memory, multimedia, sensors, display, and communication Explores the underlying protocols and architecture of each interface with multiple examples Guides through competing standards and explains how different interfaces might interact or interfere with each other Explains challenges in system design, validation, debugging and their impact on development

Download or read book Broadband Cable Access Networks written by David Large and published by Morgan Kaufmann. This book was released on 2008-11-25 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Broadband Cable Access Networks focuses on broadband distribution and systems architecture and concentrates on practical concepts that will allow the reader to do their own design, improvement, and troubleshooting work. The objective is to enhance the skill sets of a large population that designs and builds broadband cable plants, as well as those maintaining and troubleshooting it. A large cross-section of technical personnel who need to learn these skills design, maintain, and service HFC systems from signal creation through transmission to reception and processing at the customer end point. In addition, data/voice and video specialists need to master and reference the basics of HFC design and distribution before contending with the intricacies of their own unique services. This book serves as an essential reference to all cable engineers—those who specifically design and maintain the HFC distribution plant as well as those primarily concerned with data/voice technology as well as video technology. Concentrates on practical concepts that will allow the user to do his own design, improvement, and trouble-shooting work. Prepares cable engineers and technicians to work with assurance as they face the latest developments and future directions. Concise and tightly focused, allowing readers to easily find answers to questions about an idea or concept they are developing in this area.

Download or read book Multimedia Image and Video Processing written by Ling Guan and published by CRC Press. This book was released on 2017-12-19 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt: As multimedia applications have become part of contemporary daily life, numerous paradigm-shifting technologies in multimedia processing have emerged over the last decade. Substantially updated with 21 new chapters, Multimedia Image and Video Processing, Second Edition explores the most recent advances in multimedia research and applications. This edition presents a comprehensive treatment of multimedia information mining, security, systems, coding, search, hardware, and communications as well as multimodal information fusion and interaction. Clearly divided into seven parts, the book begins with a section on standards, fundamental methods, design issues, and typical architectures. It then focuses on the coding of video and multimedia content before covering multimedia search, retrieval, and management. After examining multimedia security, the book describes multimedia communications and networking and explains the architecture design and implementation for multimedia image and video processing. It concludes with a section on multimedia systems and applications. Written by some of the most prominent experts in the field, this updated edition provides readers with the latest research in multimedia processing and equips them with advanced techniques for the design of multimedia systems.

Download or read book The Information Infrastructure written by Harvard Business Review and published by Harvard Business Review Press. This book was released on 1991 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deploying QoS for Cisco IP and Next Generation Networks written by Vinod Joseph and published by Morgan Kaufmann. This book was released on 2009-05-12 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deploying QoS for IP Next Generation Networks: The Definitive Guide provides network architects and planners with insight into the various aspects that drive QoS deployment for the various network types. It serves as a single source of reference for businesses that plan to deploy a QoS framework for voice, video, mobility and data applications creating a converged infrastructure. It further provides detailed design and implementation details for various service deployments across the various Cisco platforms such as the CRS-1, 12000, 7600 & 7200 series routers that are widely deployed in most Carrier Networks. The book covers architectural and implementation specific information plus recommendations for almost all the popular line cards across the various hardware platforms widely used in the market. It also addresses QoS architecture and deployment on the Cisco CRS-1 platform and is considered as a unique selling point of this book. In short the books serve as an "On the Job Manual" which can also be used as a study guide for Cisco specialist certification programs (CCNA, CCIP, CCIE) This book will includes detailed illustration and configurations. In addition, it provides detailed case studies along with platform specific tests and measurement results. A link to a detailed tutorial on QoS metrics and associated test results will be available at the book's companion website in order to ensure that the reader is able to understand QoS functionality from a deployment standpoint. Covers the requirements and solutions in deploying QoS for voice, video, IPTV, mobility and data traffic classes (Quad-play networks), saving the reader time in searching for hardware specific QoS information, given the abundance of Cisco platforms and line cards. Presents real-life deployments by means of detailed case studies, allowing the reader to apply the same solutions to situations in the work place. Provides QoS architecture and implementation details on Cisco CRS-1, 12000, 7600, and 7200 routing platforms using Cisco IOS/IOS-XR software, aiding the reader in using these devices and preparing for Cisco specialist certification.

Download or read book The Last Centurion written by John Ringo and published by Baen Publishing Enterprises. This book was released on 2008-08-01 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Centurions were the guardians of Rome. At the height of the Roman Republic there were over five thousand qualified Roman Centurions in the Legions. To be a Centurion required that, in a mostly illiterate society, one be able to read and write clearly, to be able to convey and create orders, to be capable of not only performing every skill of a Roman soldier but teach every skill of a Roman soldier. Becoming a Centurion required intense physical ability, courage beyond the norm, years of sacrifice and a total devotion to the philosophy which was Rome. When Rome fell to barbarian invaders, there were less than five hundred qualified Centurions. Not because Rome had fewer people but because it had fewer willing to make the sacrifices. And the last Centurions left their shields in the heather and took a barbarian bride . . . We are . . . The Last Centurions. At the publisher's request, this title is sold without DRM (Digital Rights Management).

Download or read book Intelligent Image and Video Compression written by Fan Zhang and published by Academic Press. This book was released on 2021-04-07 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intelligent Image and Video Compression: Communicating Pictures, Second Edition explains the requirements, analysis, design and application of a modern video coding system. It draws on the authors’ extensive academic and professional experience in this field to deliver a text that is algorithmically rigorous yet accessible, relevant to modern standards and practical. It builds on a thorough grounding in mathematical foundations and visual perception to demonstrate how modern image and video compression methods can be designed to meet the rate-quality performance levels demanded by today's applications and users, in the context of prevailing network constraints. "David Bull and Fan Zhang have written a timely and accessible book on the topic of image and video compression. Compression of visual signals is one of the great technological achievements of modern times, and has made possible the great successes of streaming and social media and digital cinema. Their book, Intelligent Image and Video Compression covers all the salient topics ranging over visual perception, information theory, bandpass transform theory, motion estimation and prediction, lossy and lossless compression, and of course the compression standards from MPEG (ranging from H.261 through the most modern H.266, or VVC) and the open standards VP9 and AV-1. The book is replete with clear explanations and figures, including color where appropriate, making it quite accessible and valuable to the advanced student as well as the expert practitioner. The book offers an excellent glossary and as a bonus, a set of tutorial problems. Highly recommended! --Al Bovik An approach that combines algorithmic rigor with practical implementation using numerous worked examples Explains how video compression methods exploit statistical redundancies, natural correlations, and knowledge of human perception to improve performance Uses contemporary video coding standards (AVC, HEVC and VVC) as a vehicle for explaining block-based compression Provides broad coverage of important topics such as visual quality assessment and video streaming