Telecommunications in Disaster Areas
Disasters happen over relatively short time periods and are usually unexpected, leaving in their wake large numbers of casualties and severe infrastructure damages. These disasters can be due to natural causes (earthquakes, fires, floods, hurricanes, epidemics or combinations thereof) or they can be manmade (industrial accidents, terrorism and war). Essential communications breakdown is one of the common characteristics of all disasters. The partial or complete failure of telecommunications infrastructure leads to preventable loss of life and damage to property, by causing delays and errors in emergency response and disaster relief efforts. Despite the increasing reliability and resiliency of modern telecommunications networks to physical damage, the risk associated with communications failures still remains serious because of growing dependence upon these tools in emergency operations. Coordinated relief to the affected areas needs to be given as soon as possible, so to minimize further nefarious effects. In such scenarios it is vital that communications between interested parties, i.e. relief and security groups, are established as quickly and as easily as possible, ideally in a plug & play or zero configuration fashion. The acknowledgment that infrastructure-based networks in such deployment areas may be destroyed raises the need for new alternatives and communication paradigms, ideally infrastructure-less, and for decentralized wireless technologies. Technical topics discussed in Telecommunications in Disaster Areas include: ���� System Engineering, Power and Communication Infrastructure; ���� Self-Organizing, Cognitive and Location-aware Networks; ���� Public Safety Scenarios Modelling; ���� Inter-Network Interoperability; ���� Networks of Mobile Robots.
Single and Cross-Layer Mimo Techniques for Imt-Advanced
In the last two decades, the wireless arena has witnessed the emergence of an astonishing number of technologies which play a part in the definition of new wireless systems. Driven by the pressing capacity demand, the research community has developed several technological enablers. Fundamental technological building blocks that will be part of wireless systems in the near-future definitely include: Orthogonal Frequency Division Multiplexing (OFDM) modulation at the physical (PHY) layer, Multiple Input Multiple Output (MIMO) systems, and a cross-layer (CL) stack design. While the benefits of OFDM have been recognized for several years, the real capacity improvement of MIMO antennae is still being debated today. As to the last point, even if opportunities for CL have been pointed out for a long time, the impact on the actual legacy systems has not been noticeable, as investors are hesitant to implement the inherent design paradigm shift. Single and Cross-Layer MIMO Techniques for IMT-Advanced will present some advanced MIMO techniques where adaptivity, cross-layer approach, and MIMO antennae are analyzed together to show a deep impact on the sum-capacity achievable over the wireless link. The introduction presents the functional requirements for IMT-A candidate systems and the relation between IEEE802.16 and LTE wireless access networks. Then, in the first part, adaptive strategies are analyzed separately at the PHY and Medium Access Control (MAC) layers. The second part presents an evolution of the previous approach, providing a cross-layer MIMO-ARQ protocol, where adaptive MIMO schemes, namely Spatial Multiplexing (SM) and STBC Alamouti, are used with ARQ protocol. A Multiple User (MU) network is served in DownLink (DL) with a Round Robin (RR) scheduler; the design is ready to include more advanced schedulers. The ARQ state machine at the MAC layer is aware of per-antenna ARQ. The interaction between the ARQ and the PHY layer, with a per-antenna ACK, allows resource exploitation to increase with per-antenna ACKs, shifting from MIMO Signal Processing Gain to MIMO Protocol Gain with no need for Channel State Information (CSI) feedback. The absence of CSI feedback at the PHY layer is an important characteristic of the proposed MIMO-ARQ cross-layer designs since MIMO CSI feedback (when feasible) drastically reduces the network efficiency. The added degrees of freedom offered by MIMO transmissions can make the difference if correctly exploited both at the physical and medium access layers, in particular for overcoming the problem of low MIMO channel ranks. The advantages of the paradigm shift from signal processing gain to protocol gain - together with the modifications to be applied at the classical protocol stack - are discussed in the final chapter.
From Betamax to Blockbuster
How the VCR was transformed from a machine that records television into a medium for movies.The first video cassette recorders were promoted in the 1970s as an extension of broadcast television technology--a time-shifting device, a way to tape TV shows. Early advertising for Sony's Betamax told potential purchasers "You don't have to miss Kojak because you're watching Columbo." But within a few years, the VCR had been transformed from a machine that recorded television into an extension of the movie theater into the home. This was less a physical transformation than a change in perception, but one that relied on the very tangible construction of a network of social institutions to support this new marketplace for movies. In From Betamax to Blockbuster, Joshua Greenberg explains how the combination of neighborhood video stores and the VCR created a world in which movies became tangible consumer goods. Greenberg charts a trajectory from early "videophile" communities to the rise of the video store--complete with theater marquee lights, movie posters, popcorn, and clerks who offered expert advice on which movies to rent. The result was more than a new industry; by placing movies on cassette in the hands (and control) of consumers, video rental and sale led to a renegotiation of the boundary between medium and message, and ultimately a new relationship between audiences and movies. Eventually, Blockbuster's top-down franchise store model crowded local video stores out of the market, but the recent rise of Netflix, iTunes, and other technologies have reopened old questions about what a movie is and how (and where) it ought to be watched. By focusing on the "spaces in between" manufacturers and consumers, Greenberg's account offers a fresh perspective on consumer technology, illustrating how the initial transformation of movies from experience into commodity began not from the top down or the bottom up, but from the middle of the burgeoning industry out.
Digital System Design
Embedded systems are today, widely deployed in just about every piece of machinery from toasters to spacecraft. Embedded system designers face many challenges. They are asked to produce increasingly complex systems using the latest technologies, but these technologies are changing faster than ever. They are asked to produce better quality designs with a shorter time-to-market. They are asked to implement increasingly complex functionality but more importantly to satisfy numerous other constraints. To achieve the current goals of design, the designer must be aware with such design constraints and more importantly, the factors that have a direct effect on them. One of the challenges facing embedded system designers is the selection of the optimum processor for the application in hand; single-purpose, general-purpose or application specific. Microcontrollers are one member of the family of the application specific processors. The book concentrates on the use of microcontroller as the embedded system's processor, and how to use it in many embedded system applications. The book covers both the hardware and software aspects needed to design using microcontroller. The book is ideal for undergraduate students and also the engineers that are working in the field of digital system design.
Planning and Optimisation of 3g and 4g Wireless Networks
An overwhelming development has taken place in voice and data communication over the last twenty years as the industry evolved from fixed to mobile and wireless communication. This development is supported with new technologies and evolving networks from the first generation (1G), 2G, 3G and the fourth generation (4G) mobile wireless communications. During this evolution and revolution in telecommunications, the industry also changed from circuit switched networks to packet switched networks in 3G and 3G. Hence the planning of telecommunication networks has equally changed significantly. By providing the necessary background and technical content to understand and stay abreast of how to plan the new network types, Planning and Optimisation of 3G and 4G Wireless Networks explores the idiosyncrasies of how to plan the various types of wireless networks. Packed with details of the technologies that support each network type, this cutting-edge reference leads the reader step by step on how to plan and optimize various types of wireless networks. It examines current and emerging network planning and enhancement techniques through examples in HSPA, B3G, WiMAX, mesh networks, personal area networks and wireless sensor networks. It clearly provides the different architectures of these networks along with their support design methods. It includes coverage of the latest wireless network types, planning and optimization methods in the form of: - 3G - HSPA and Beyond 3G - WiMAX (fixed and mobile) and LTE - OFDM - Wireless mesh networks - Personal area networks - Propagation models and link budgets - Cognitive radio and spectrum sensing - Planning of wireless sensor networks - Synchronisation of CDMA systems - Interference suppression - Cross-layer optimisation - Topology control - Resource management The illustrative planning and optimization methods provide the reader with a clear foot path into future networks. This book provides educators, industry practitioners, regulators, researchers and subscribers with the ideal foundation for developing the understanding required to design, deploy, train, and use wireless networks of various types.
Future Trends and Challenges for Ict Standardization
This book comes in response to the Future Trends and Challenges for ICT Standardization. The technological areas covered are: - the need, importance and management of radio spectrum, - the development of future radio access technologies, - the convergence of telecommunications and broadcasting, - the possibilities and challenges brought by the Internet of Things (IoT), - the environment sustainability through the use of Green ICT. The book aims at identifying the importance of ICT standardization for strengthening the Indian industrial and business sector through Global ICT Standardization Forum for India (GISFI-www.gisfi.org). Further, it outlines the major challenges and trends in the ICT development worldwide, while mapping the Indian efforts on the background of the overall progress. The motivation behind this book is that a more informed context is made available to ensure sustainable scientific and economic growth. Finally, the book puts forward the best research roadmaps, strategies and challenges contributed by engineers from the industry, academia, and Government. It addresses the benefits to the entire society resulting from standardization.
Link Adaptation for Relay-Based Cellular Networks
Link Adaptation for Relay-Based Cellular Networks focuses on the implementation of various link adaptation methods in OFDM(A) (Orthogonal Frequency Division Multiplexing/Multiple Access)-Time Division Duplex (TDD) based two-hop cellular networks. The analysis and design consider infrastructure based relays. New link adaptive transmission methods which dynamically select the channel coding, modulation, forwarding, relaying mechanisms and the packet size have been designed and evaluated for such networks. The selection among various schemes is based on maximizing the end-to-end throughput. This book provides a channel adaptive scheduler which considers the multiplexing loss caused by the two-phase nature of wireless relaying. The scheduler dynamically schedules the users on the frequency-time radio resources with efficient Modulation and Coding Schemes (MCS)s selected by Adaptive Modulation and Coding (AMC). Relaying is used only if it can provide throughput enhancement. The guidelines for efficient deployment of infrastructure based relay terminals are given. For the two-hop cellular communication systems, the system level performance of various cooperative diversity schemes has been investigated with the scheduler developed and the relays efficiently deployed in the cell. This investigation for low mobility scenarios shows that, a simple cooperative diversity scheme that dynamically chooses the best scheme among direct transmission and two-hop conventional relaying is a promising choice when compared to various more complex cooperative diversity schemes. In this book, a hop adaptive Medium Access Control (MAC)-Protocol Data Unit (PDU) size optimization is proposed for wireless relay networks. With this proposal, the MAC-PDU size in different hops can be different and it is optimized based on the channel condition of each hop. Such optimization improves the end-to-end goodput via MAC-PDU size optimization. The proposal further reduces the total overhead transmitted in the end-to-end path via transmitting longer length packets in the potentially robust Base Station (BS)-to-Relay Station (RS) links. The time and carrier frequency offset issues and the hardware complexity of various cooperative diversity scheme implementations are investigated for the MS. The investigations show a significant complexity increase with the cooperative diversity schemes which require coherent signal combining at the MS. Hence, coherent signal combining at the MS should be used if there is a throughput gain.
Entity Authentication and Personal Privacy in Future Cellular Systems
There are now (Q1 2009) more than 4 billion cellular subscribers in the world and this number is constantly growing. With this in mind it should be clear that use of mobile communication has already become both pervasive and ubiquitous. It has become a global commodity really. Entity Authentication and Personal Privacy in Future Cellular Systems aims at explaining and examining access security as it is found in mobile/cellular systems. A thorough investigation of how access security and personal privacy is handled in the 3GPP system is conducted. This includes both the 2G systems GSM/GPRS and the 3G system UMTS. The emerging fourth generation LTE architecture is also examined. The first part of the book deals exclusively with presenting access security as found in the 3GPP system. Particular attention is given to the authentication and key agreement procedures. The 3GPP systems have evolved and the access security architecture in LTE is substantially more advanced and mature than what you would find in GSM/GPRS, but even the LTE security architecture has its limitations. In part two of the book we go on to examine what is missing from the current cellular access security architectures. Some of the shortcomings found in GSM/GPRS and later UMTS have been partially addressed in LTE, but the burden of backwards compatibility has meant that many issues could not easily be resolved. Free from those restrictions, we shall see that one can provide substantially improved subscriber privacy and enhanced entity authentication, while also avoiding the delegated authentication control that all 3GPP systems have.The design of authentication protocols is discussed in depth, and this would also include looking into the role of formal verification in the design of security protocols.
Wireless Independent Living for a Greying Population
It is widely known today that not only are the aged ageing, or the old getting older, but they are also increasing in number the world over. At the same time, proper care and support for our aged is increasingly at risk. Without some form of support, the quantitative extension of life cannot be matched by a qualitative one. This may mean that the opportunity provided by a longer life is squandered, and life itself, of course, is nothing if not opportunity. Societies find that self-sufficiency and independence not only contribute to individual well-being, but are also economically desirable due to the resultant increase in productivity. The challenges of daily living for a growing population of the aged form the basis of the independent living platform, the AGE@HOME platform, which is described in this book. The platform combines both existing and emerging technologies suitable for the home. Its use and application is considered in the wider context of Web 2.0, the internet of things, and other elements of the burgeoning digital world. It is time that a holistic and multi-disciplinary approach to this constantly enlarging area of human existence is taken. This book is written for researchers and designers of wireless tools, analog and digital circuits as well as academics who are active in the various fields of Human Sciences.
Performance Modelling and Analysis of Heterogeneous Networks
Over the recent years, a considerable amount of effort has been devoted, both in industry and academia, towards the performance modelling, evaluation and prediction of convergent multi-service heterogeneous networks, such as wireless and optical networks, towards the design and dimensioning of the next and future generation Internets. This book follows Heterogeneous Networks: Traffic Engineering, Performance Evaluation Studies and Tools and presents recent advances in networks of diverse technology reflecting the state-of-the-art technology and research achievements in performance modelling, analysis and applications worldwide. Technical topics discussed in the book include: ���� Multiservice Switching Networks; ���� Wireless Ad Hoc Networks; ���� Wireless Sensor Networks; ���� Wireless Cellular Networks; ���� Optical Networks; Heterogeneous Networks: Performance Modelling and Analysis contains recently extended research papers, which have their roots in the series of the HET-NETs International Working Conferences focusing on the 'Performance Modelling and Evaluation of Heterogeneous Networks' under the auspices of the EU Networks of Excellence Euro-NGI and Euro-FGI. Heterogeneous Networks: Performance Modelling and Analysis is ideal for personnel in computer/communication industries as well as academic staff and master/research students in computer science, operational research, electrical engineering and telecommunication systems and the Internet. CACHE_VST
Advances in Broadband Communication and Networks
Broadband communications has become the major focus for industry for offering rich multimedia IP services in next generation networks. Advances in Broadband Communication and Networks deals with the state-of-the-art and the underlying principles of key technologies which facilitate broadband telecommunications. This includes millimetre wave gigabit Ethernet, terahertz communication, multiple input multiple output (MIMO) technology, orthogonal frequency division multiplex (OFDM), ultra wideband (UWB) and the fourth generation (4G) network technologies. The book illustrates the use of these technologies, including high resolution three-dimensional millimetre wave radar imaging and terahertz imaging techniques. Within the next few years advances in graphic rendering and the application of millimetre wave radar technology will enable high resolution radar surveillance and operators of industrial processes to control their machines and to navigate remotely even in poor visibility environments. The principles and performance of terahertz imaging are also demonstrated. The performance and success of emerging all-IP networks depend largely on the efficiency of broadband technologies the authors provide the basis for 4G networks and explore key performance measures such as quality of service and handover between distributed networks (mobile and fixed). The book also demonstrates the medical and biomedical applications of broadband wireless communications.
Telephone Projects for the Evil Genius
Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product.EVIL NEVER SOUNDED SO CLEARListen up! Telephone Projects for the Evil Genius has everything you need to build and customize both wired and wireless phone gadgets that not only save you money, but also improve the quality of your life! Using easy-to-find parts and tools for creating both retro and modern phone projects, this do-it-yourself guide begins with some background on the development of the landline phone and the cell. You'll review basic building techniques, such as installing components, building circuits, and soldering. Then you'll dive into the projects, which, while they range from easy to complex, are all designed to optimize your time and simplify your life! Telephone Projects for the Evil Genius: Features step-by-step instructions for 40 clever and practical phone projects, complete with 150 how-to illustrations Shows you how to enhance both wire-connected phones and cell phonesLeaves room for you to customize your projectsRemoves the frustration-factor-all the parts you need are listed, along with sourcesFrom simple phone gadgets to sophisticated remote control devices, Telephone Projects for the Evil Genius provides you with all the schematics, charts, and tables you need to complete such fun projects as: Ringing phone light flasherTelephone amplifierTelephone ring-controlled relayRemote telephone bell projectTouch tone generatorPhone voice scramblerCaller ID decoder projectTeleAlert phone pager and controlWireless remote phone ringerConferencerAnd much more!
Communication Nets
This text develops a queuing theory model of communications nets, with realistic assessments that will benefit those working with computers and other communications systems. Topics include optimal channel capacity assignment, effect of priority and other queue disciplines, choice of routine procedure, fixed-cost restraint, and design of topological structures. 1964 edition.
Skype for Dummies
Here's the fun and easy way to understand all the hype about Skype and make this cool alternative communication system work for you People love Skype because it's fairly simple to use, it's free, it doesn't have advertisements or pop-up screens, and its communications are encrypted and secure. If you want the ability to make free voice calls or want to maximize Skype and get the most out of this free global telephony system, you've come to the right place. All you need to get going with Skype is a computer with Internet access, a headset or microphone -- and this book! Although the technology is simple, it has some complexities when you go beyond making simple calls. Skype For Dummies covers call forwarding, voice mail, and conference calling and explains the use of two very popular and important Skype features: SkypeIn: Receive telephone calls that you can answer through Skype on your computer SkypeOut: Make calls out to regular old telephones from your computer This no-nonsense guide is written in plain English, leaving the jargon at the door. You'll learn to Install and configure Skype on different platforms and various mobile connections Create a contacts list Set up voicemail and call forwarding Use Skype for worldwide conference calls and Skypecasting Enhance Skype with Bluetooth, Wi-Fi wireless, and video Change your Skype menus to a different language Adjust different hardware configurations and add-ons Troubleshoot problems with hardware configurations and other common issues Skype For Dummies provides guidance on using this technology in a business setting, including some implementations that can help reduce support desk costs and automate surveys and interviews. A popular use of Skype is for video calling, and the book shows how you can easily install and configure this can't-miss feature. A dedicated web site keeps the book up to date as Skype adds new features. Additionally, you'll discover ten ways to use Skype to promote your business and ten ways to use Skype at school. With an appendix on multilanguage support and another on tips and tricks, you won't want to Skype anyone until you have your copy of Skype For Dummies in hand.
Communication Networks
Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product.Clear, operations-focused, and half the size of traditional academic textbooks, this book is the easiest way for communications engineers and students to master the complexities of network behaviorThis unique guide to communication networks fundamentals takes a new approach. Rather than following the standard (and increasingly outmoded) OSI network model, it is organized around networking concepts. Rather than plunge readers into the alphabet soup of communications protocols and technologies, Kasera starts with a concept like "routing," and explains each technology in terms of how it helps to perform that function. The book is designed for communications engineers and technicians, as well as students.
Broadbandits
Dieses Buch blickt hinter die Kulissen der Telekombranche. Hier lesen Sie alles, wor羹ber die Medien nicht berichten - 羹ber die Hauptakteure, die in Boomzeiten den Reibach gemacht haben, 羹ber die Experten, die sich einen Namen gemacht und ihn wieder verloren haben, 羹ber die Unternehmer, die jetzt hart k瓣mpfen, um ihrem Leben wieder einen Sinn zu geben.... "Broadbandits" betrachtet die Telekom-Spekulationsblase aus der Sicht eines Insiders. Mit einer F羹lle von Geschichten und Anekdoten 羹ber eigenwillige Alleing瓣nger, die einfache Licht- und Glasfaserkabel in regelrechte Goldadern verwandelten, 羹ber Finanziers, die zu gierig wurden und Millionen Ahnungsloser schr繹pften, 羹ber unbedarfte Risikokapitalgeber, die glaubten, dass sie die Hauptader angezapft h瓣tten, 羹ber gl羹cklose Unternehmer, die 羹berzeugt waren, dass sie im Begriff waren, die Welt zu ver瓣ndern und 羹ber selbsternannte Experten, die das Geschehen aus dem Hintergrund anfeuerten. Das Buch stellt eine schillernde Besetzung vor - angefangen beim Sohn eines ehemaligen Kneipenwirts von Brooklyn bis hin zum Nachfahre einer blaubl羹tigen Yankeefamilie - und erz瓣hlt, wie sie alle von diesem neuen Goldrausch erfasst und mitgerissen wurden. Hier lesen Sie die Insiderstory, warum viele Startups und auch alt eingesessene Telekomunternehmen dem sog. "high yield heroin", der Droge des gro?en Gewinns, zum Opfer gefallen sind. "Broadbandits" ist das ma?gebliche Buch 羹ber die Finanztricks und Machtk瓣mpfe, die die Telekombranche schlie?lich zu Fall gebracht haben. Die wohl faszinierendste und spannendste Geschichte 羹ber den Untergang der Telekom-Riesen, 羹ber Intrigen und Habgier. Om Malik ist ein f羹hrender Journalist des Red Herring und hat sich auf den Telekommunikationsmarkt spezialisiert.
Performance Analysis and Modeling of Digital Transmission Systems
Mobile Applications
A guide to building successful mobile applications. It covers various facets of development and deployment. It is useful to those who needs to deliver robust, high-value mobile solutions: project managers, technical leaders, architects, and experienced developers alike.
802.11 Security
Mention wireless networks, and the question of security will soon follow. It's not surprising that in spite of compelling business arguments for going wireless, many companies are holding back because of security concerns. But, while it's true that wireless networks create security issues that don't exist in wired networks, the issues are not insurmountable. 802.11 Security shows how you can plan for and successfully contend with security obstacles in your wireless deployment. This authoritative book not only explains the security issues, but shows you how to design and build a your own secure wireless network. 802.11 Security covers the entire process of building secure 802.11-based wireless networks, in particular, the 802.11b ("Wi-Fi") specification. The authors provide detailed coverage of security issues unique to wireless networking, such as Wireless Access Points (WAP), bandwidth stealing, and the problematic Wired Equivalent Privacy component of 802.11. You'll learn how to configure a wireless client and to set up a WAP using either Linux or Free BSD. You'll also find thorough information on controlling network access and encrypting client traffic. Beginning with an introduction to 802.11b in general, the book gives you a broad basis in theory and practice of wireless security, dispelling some of the myths along the way. In doing so, they provide you with the technical grounding required to think about how the rest of the book applies to your specific needs and situations. Next, the book details the technical setup instructions needed for both the Linux and FreeBSD operating systems. Some of the topics covered include: Station Security for Linux, FreeBSD, Open BSD, Mac OS X and Windows Setting Up Access Point Security Gateway Security, including building Gateways, firewall Rules, Auditing, etc. Authentication and Encryption FreeBSD IPsec client and gateway configuration Linux IPsec client and gateway configuration 802.1x authentication 802.11 Security is a book whose time has come. If you are a network, security, or systems engineer, or anyone interested in deploying 802.11b-based systems, you'll want this book beside you every step of the way.
Outline and Digital Communications
Confusing Textbooks? Missed Lectures? Not Enough Time?Fortunately for you, there's Schaum's Outlines. More than 40 million students have trusted Schaum's to help them succeed in the classroom and on exams. Schaum's is the key to faster learning and higher grades in every subject. Each Outline presents all the essential course information in an easy-to-follow, topic-by-topic format. You also get hundreds of examples, solved problems, and practice exercises to test your skills. This Schaum's Outline gives youPractice problems with full explanations that reinforce knowledgeCoverage of the most up-to-date developments in your course fieldIn-depth review of practices and applicationsFully compatible with your classroom text, Schaum's highlights all the important facts you need to know. Use Schaum's to shorten your study time-and get your best test scores!Schaum's Outlines-Problem Solved.
Telecom Management Crash Course
Shows service providers how to efficiently manage their technology advantages and back-end operations to survive in this challenging economic climate.
