Download or read book Decentralization Channel Management in Scalable Multihop Spread spectrum Packet Radio Networks written by Timothy Jason Shepard and published by . This book was released on 1995 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Decentralized Channel Management in Scalable Multihop Spread Spectrum Packet Radio Networks written by Timothy Jason Shepard and published by . This book was released on 1995 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "This thesis addresses the problems of managing the transmissions of stations in a spread-spectrum packet radio network so that the system can remain effective when scaled to millions of nodes concentrated in a metropolitan area. The principal difficulty in scaling a system of packet radio stations is interference from other stations in the system. Interference comes both from nearby stations and from distant stations. Each nearby interfering station is a particular problem, because a signal received from it may be as strong as or stronger than the desired signal from some other station. Far-off interfering stations are not individually a problem, since each of their signals will be weaker, but the combined effect may be the dominant source of interference. The thesis begins with an analysis of propagation and interference models. The overall noise level in the system (mainly caused by the many distant stations) is then analyzed, and found to remain manageable even as the system scales to billions of nodes. A scheme for designing a scalable packet radio network is then presented. Included is a method of scheduling packet transmissions to avoid collisions (caused by interference from nearby stations) without the need for global coordination or synchronization. Simulations of a system of one thousand stations are used to verify and illustrate the methods used. A method of choosing routes (minimum-energy routes) is demonstrated in simulation to produce a fully connected and functional network for one hundred and one thousand randomly placed stations. Unfortunately, congestion as the system scales is unavoidable if the traffic is not limited to some degree of locality. If traffic is limited to a few hops, then for a large system the techniques presented in this thesis are superior to ideal time division multiplexing of a clear channel."
Download or read book The Future of Ideas written by Lawrence Lessig and published by Vintage. This book was released on 2002-11-12 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Internet revolution has come. Some say it has gone. In The Future of Ideas, Lawrence Lessig explains how the revolution has produced a counterrevolution of potentially devastating power and effect. Creativity once flourished because the Net protected a commons on which widest range of innovators could experiment. But now, manipulating the law for their own purposes, corporations have established themselves as virtual gatekeepers of the Net while Congress, in the pockets of media magnates, has rewritten copyright and patent laws to stifle creativity and progress. Lessig weaves the history of technology and its relevant laws to make a lucid and accessible case to protect the sanctity of intellectual freedom. He shows how the door to a future of ideas is being shut just as technology is creating extraordinary possibilities that have implications for all of us. Vital, eloquent, judicious and forthright, The Future of Ideas is a call to arms that we can ill afford to ignore.
Download or read book Smart Mobs written by Howard Rheingold and published by Basic Books. This book was released on 2007-03-21 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: From Tokyo to Helsinki, Manhattan to Manila, Howard Rheingold takes us on a journey around the world for a preview of the next techno-cultural shift-a shift he predicts will be as dramatic as the widespread adoption of the PC in the 1980s and the Internet in the 1990s. The coming wave, says Rheingold, is the result of super-efficient mobile communications-cellular phones, personal digital assistants, and wireless-paging and Internet-access devices that will allow us to connect with anyone, anywhere, anytime. From the amusing ("Lovegetty" devices in Japan that light up when a person with the right date-potential characteristics appears in the vicinity) to the extraordinary (the overthrow of a repressive regime in the Philippines by political activists who mobilized by forwarding text messages via cell phones), Rheingold gives examples of the fundamentally new ways in which people are already engaging in group or collective action. He also considers the dark side of this phenomenon, such as the coordination of terrorist cells, threats to privacy, and the ability to incite violent behavior. Applying insights from sociology, artificial intelligence, engineering, and anthropology, Rheingold offers a penetrating perspective on the brave new convergence of pop culture, cutting-edge technology, and social activism. At the same time, he reminds us that, as with other technological revolutions, the real impact of mobile communications will come not from the technology itself but from how people use it, resist it, adapt to it, and ultimately use it to transform themselves, their communities, and their institutions.
Download or read book NETWORKING 2000 Broadband Communications High Performance Networking and Performance of Communication Networks written by Guy Pujolle and published by Springer. This book was released on 2003-06-29 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt: This was the first conference jointly organized by the IFIP Working Groups 6. 2, 6. 3, and 6. 4. Each of these three Working Groups has its own established series of conferences. Working Group 6. 2 sponsors the Broadband Communications series of conferences (Paris 1995, Montreal 1996, Lisboa 1997, Stuttgart 1998, and Hong-Kong 1999). Working Group 6. 3 sponsors the Performance of Communication Systems series of conferences (Paris 1981, Zürich 1984, Rio de Janeiro 1987, Barcelona 1990, Raleigh 1993, Istanbul 1995, and Lund 1998). Working Group 6. 4 sponsors the High Performance Networking series of conferences (Aaren 1987, Liège 1988, Berlin 1990, Liège 1992, Grenoble 1994, Palma 1995, New York 1997, Vienna 1998). It is expected that this new joint conference will take place every two years. In view of the three sponsoring Working Groups, there were three separate tracks, one per Working Group. Each track was handled by a different co chairman. Specifically, the track of Working Group 6. 2 was handled by Ulf Körner, the track of Working Group 6. 3 was handled by Ioanis Stavrakakis, and the track of Working Group 6. 4 was handled by Serge Fdida. The overall program committee chairman was Harry Perros, and the general conference chairman was Guy Pujolle. A total of 209 papers were submitted to the conference of which 82 were accepted. Each paper was submitted to one of the three tracks.
Download or read book Information Hiding written by Ross Anderson and published by Springer Science & Business Media. This book was released on 1996-11-13 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the strictly refereed post-workshop proceedings of the First International Workshop on Information Hiding, held in Cambridge, UK, in May/June 1996, within the research programme in computer security, cryptology and coding theory organized by the volume editor at the Isaac Newton Institute in Cambridge. Work on information hiding has been carried out over the last few years within different research communities, mostly unaware of each other's existence. The 26 papers presented define the state of the art and lay the foundation for a common terminology. This workshop is very likely to be seen at some point as one of those landmark events that mark the birth of a new scientific discipline.
Download or read book Mobile Communications Handbook written by Jerry D. Gibson and published by CRC Press. This book was released on 2017-12-19 with total page 813 pages. Available in PDF, EPUB and Kindle. Book excerpt: With 26 entirely new and 5 extensively revised chapters out of the total of 39, the Mobile Communications Handbook, Third Edition presents an in-depth and up-to-date overview of the full range of wireless and mobile technologies that we rely on every day. This includes, but is not limited to, everything from digital cellular mobile radio and evolving personal communication systems to wireless data and wireless networks Illustrating the extraordinary evolution of wireless communications and networks in the last 15 years, this book is divided into five sections: Basic Principles provides the essential underpinnings for the wide-ranging mobile communication technologies currently in use throughout the world. Wireless Standards contains technical details of the standards we use every day, as well as insights into their development. Source Compression and Quality Assessment covers the compression techniques used to represent voice and video for transmission over mobile communications systems as well as how the delivered voice and video quality are assessed. Wireless Networks examines the wide range of current and developing wireless networks and wireless methodologies. Emerging Applications explores newly developed areas of vehicular communications and 60 GHz wireless communications. Written by experts from industry and academia, this book provides a succinct overview of each topic, quickly bringing the reader up to date, but with sufficient detail and references to enable deeper investigations. Providing much more than a "just the facts" presentation, contributors use their experience in the field to provide insights into how each topic has emerged and to point toward forthcoming developments in mobile communications.
Download or read book Technology Trends in Wireless Communications written by Ramjee Prasad and published by Artech House. This book was released on 2003 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an authoritative description of the range of future mobile communications technologies.
Download or read book Cognitive Wireless Communication Networks written by Ekram Hossain and published by Springer Science & Business Media. This book was released on 2007-10-23 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a unified view on the state-of-the-art of cognitive radio technology. It includes a set of research and survey articles featuring the recent advances in theory and applications of cognitive radio technology for the next generation (e.g., fourth generation) wireless communication networks. The contributed articles cover both the theoretical concepts (e.g., information-theoretic analysis) and system-level implementation issues.
Download or read book Performance Evaluation and Planning Methods for the Next Generation Internet written by Andre Girard and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: GERAD celebrates this year its 25th anniversary. The Center was created in 1980 by a small group of professors and researchers of HEC Montreal, McGill University and of the Ecole Polytechnique de Montreal. GERAD's activities achieved sufficient scope to justify its conversion in June 1988 into a Joint Research Centre of HEC Montreal, the Ecole Polytechnique de Montreal and McGill University. In 1996, the U- versite du Quebec a Montreal joined these three institutions. GERAD has fifty members (professors), more than twenty research associates and post doctoral students and more than two hundreds master and Ph.D. students. GERAD is a multi-university center and a vital forum for the devel- ment of operations research. Its mission is defined around the following four complementarily objectives: • The original and expert contribution to all research fields in GERAD's area of expertise; • The dissemination of research results in the best scientific outlets as well as in the society in general; • The training of graduate students and post doctoral researchers; • The contribution to the economic community by solving important problems and providing transferable tools.
Download or read book Ambient Intelligence written by Panos Markopoulos and published by Springer Science & Business Media. This book was released on 2004-10-27 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Second European Symposium on Ambient Intelligence, EUSAI 2004, held in Eindhoven, The Netherlands in November 2004. The 36 revised full papers presented were carefully reviewed and selected from 90 submissions. The papers are organized in topical sections on ubiquitous computing: sofware architectures, communication, and distribution; context sensing and machine perception; human computer interaction in ambient intelligence environments; and algorithms, ontologies, and architectures for learning and adaptation.
Download or read book Rethinking Rights and Regulations written by Lorrie Faith Cranor and published by MIT Press. This book was released on 2003-08-29 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contributors to this volume explore the dynamics of new communications technologies and public policy; from TPRC 2002. The contributors to this volume examine issues raised by the intersection of new communications technologies and public policy in this post-boom, post-bust era. Originally presented at the 30th Research Conference on Communication, Information, and Internet Policy (TPRC 2002)—traditionally a showcase for the best academic research on this topic—their work combines hard data and deep analysis to explore the dynamic interplay between technological development and society.The chapters in the first section consider the ways society conceptualizes new information technologies and their implications for law and policy, examining the common metaphor of "cyberspace as place," alternative definitions of the Internet, the concept of a namespace, and measures of diffusion. The chapters in the second section discuss how technological change may force the rethinking of legal rights; topics considered include spectrum rights, intellectual property, copyright and "paracopyright," and the abridgement of constitutional rights by commercial rights in ISP rules. Chapters in the third and final section examine the constant adjustment and reinterpretation of regulations in response to technological change, considering, among other subjects, liability regimes for common carriers and the 1996 detariffing rule, privacy and enhanced 911, and the residual effect of state ownership on privatized telecommunication carriers. The policy implications of Rethinking Rights and Regulations are clear: major institutional changes may be the necessary response to major advances in telecommunications technology.
Download or read book Proceedings written by Asim Smailagic and published by . This book was released on 2002 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text contains information on the design and testing of computer hardware presented at the 2002 IEEE Computer Society Annual Symposium on VLSI.
Download or read book Proceedings written by and published by . This book was released on 1999 with total page 1376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wireless Sensor Networks and Applications written by Yingshu Li and published by Springer Science & Business Media. This book was released on 2008-02-10 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: A crucial reference tool for the increasing number of scientists who depend upon sensor networks in a widening variety of ways. Coverage includes network design and modeling, network management, data management, security and applications. The topic covered in each chapter receives expository as well as scholarly treatment, covering its history, reviewing state-of-the-art thinking relative to the topic, and discussing currently unsolved problems of special interest.
Download or read book IEEE International Conference on Personal Wireless Communications written by and published by . This book was released on 2000 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 2002 IEEE Seventh International Symposium on Spread Spectrum Techniques and Applications Prague Czech Republic September 2 5 2002 written by and published by . This book was released on 2002 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
