Wireless long(er) distance transmission One of the main constraints in the construction of 802.11 was that the sites have to "see" each other. The 802.16 technology can use a wideer range of frequency: 2 - 11 and 10 - 66 GHz, so some of waves reflect, which allows you to build a network, even if the stations cannot see each other directly. Of course, depending on the country and local regulations, some frequencies will not be able to be used. WiMax was designed for point-to-multipoint or to set up networks in a mesh topology, so that they form the structure of wireless MANs and provide Internet access for individual subscribers. This micro-course introduces the reader to the subject of WiMax technology and other modern wireless, packet transmission methods.
The Newnes Know It All Series takes the best of what our authors have written to create hard-working desk references that will be an engineer's first port of call for key information, design techniques and rules of thumb. Guaranteed not to gather dust on a shelf! RF (radio frequency) and wireless technologies drive communication today. This technology and its applications enable wireless phones, portable device roaming, and short-range industrial and commercial application communication such as the supply chain management wonder, RFID. Up-to-date information regarding software defined RF, using frequencies smarter, and using more of the spectrum, with ultrawideband technology is detailed. - A 360-degree view from best-selling authors including Roberto Aiello, Bruce Fette, and Praphul Chandra - Hot topics covered including ultrawideband and cognitive radio technologies - The ultimate hard-working desk reference: all the essential information, techniques, and tricks of the trade in one volume
Over the next five to 10 years, wireless technologies will dramatically reshape the communications and information infrastructure of the United States. New radio-based systems now being developed will use advanced digital technologies to bring a wide array of services to both residential and business users, including ubiquitous mobile telephone and data services and many new forms of video programming. Existing wireless systems, including radio and television broadcasting, cellular telephony, and various satellite and data networks, will also convert to digital technology. This will allow them to improve the quality of their services, expand the number of users they can serve, and offer new information and entertainment applications. Before the benefits of these wireless systems can be realized, however, technical, regulatory, and economic uncertainties must be resolved. This report examines the role wireless communication technologies will play in the evolving National Information Infrastructure (NII), examines the challenges facing policy-makers and regulators as wireless becomes a more integral part of the telecommunications and information infrastructure, and identifies some of the longer term implications of the widespread use of wireless systems and services.
"This book explores different models for inter-vehicular communication, in which vehicles are equipped with on-board computers that function as nodes in a wireless network"--Provided by publisher.
Seven Deadliest Wireless Technologies Attacks provides a comprehensive view of the seven different attacks against popular wireless protocols and systems. This book pinpoints the most dangerous hacks and exploits specific to wireless technologies, laying out the anatomy of these attacks, including how to make your system more secure. You will discover the best ways to defend against these vicious hacks with step-by-step instruction and learn techniques to make your computer and network impenetrable. Each chapter includes an example real attack scenario, an analysis of the attack, and methods for mitigating the attack. Common themes will emerge throughout the book, but each wireless technology has its own unique quirks that make it useful to attackers in different ways, making understanding all of them important to overall security as rarely is just one wireless technology in use at a home or office. The book contains seven chapters that cover the following: infrastructure attacks, client attacks, Bluetooth attacks, RFID attacks; and attacks on analog wireless devices, cell phones, PDAs, and other hybrid devices. A chapter deals with the problem of bad encryption. It demonstrates how something that was supposed to protect communications can end up providing less security than advertised. This book is intended for information security professionals of all levels, as well as wireless device developers and recreational hackers. Attacks detailed in this book include: - 802.11 Wireless—Infrastructure Attacks - 802.11 Wireless—Client Attacks - Bluetooth Attacks - RFID Attacks - Analog Wireless Device Attacks - Bad Encryption - Attacks on Cell Phones, PDAs and Other Hybrid Devices
This book provides a comprehensive overview of wireless technologies for industrial network systems. The authors first describe the concept of industrial network systems and their application to industrial automation. They then go on to cover the role of sensing and control in industrial network systems, and the challenge of sensing and control in the industrial wireless environment. Then, the existing techniques for resource efficiency information transmission are introduced and studied. Afterward, the authors introduce sensing and control-oriented transmission for industrial network systems, which take advantage of spatial diversity gain to overcome the interference and fading, which in turn improves the transmission reliability without expending extra spectrum resources and enlarging the transmission delay. Subsequently, edge assisted efficient transmission schemes are introduced, which integrate the capacities of communication, computing, and control to relieve the contradiction of resource limitation and massive data. Finally, the authors discuss open research issues and future works about information transmission in industrial network systems.
This book comprises select proceedings of the 4th International Conference on Optical and Wireless Technologies (OWT 2020). The contents of this volume focus on research carried out in the areas of Optical Communication, Optoelectronics, Optics, Wireless Communication, Wireless Networks, Sensors, Mobile Communications and Antenna and Wave Propagation. The volume also explores the combined use of various optical and wireless technologies in next generation applications, and their latest developments in applications like photonics, high speed communication systems and networks, visible light communication, nanophotonics, wireless and MIMO systems. This book will serve as a useful reference to scientists, academicians, engineers and policy-makers interested in the field of optical and wireless technologies.
This comprehensive text/reference examines the various challenges to secure, efficient and cost-effective next-generation wireless networking. Topics and features: presents the latest advances, standards and technical challenges in a broad range of emerging wireless technologies; discusses cooperative and mesh networks, delay tolerant networks, and other next-generation networks such as LTE; examines real-world applications of vehicular communications, broadband wireless technologies, RFID technology, and energy-efficient wireless communications; introduces developments towards the ‘Internet of Things’ from both a communications and a service perspective; discusses the machine-to-machine communication model, important applications of wireless technologies in healthcare, and security issues in state-of-the-art networks.