Download or read book Age of Information Aware Communication Systems written by Antzela Kosta and published by Linköping University Electronic Press. This book was released on 2020-04-16 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in wireless communications and networking technology have taken us towards a pervasively connected world in which a vast array of wireless devices, from mobile phones to environmental sensors, seamlessly communicate with each other. In many of these systems the freshness of the transmitted information is of high importance. Characterization of time-critical information can be achieved through the so-called real-time status updates that are messages, encapsulated in packets, carrying the timestamp of their generation. Status updates track time-varying content that needs to be transmitted from the generation point to a remote destination in a network. To quantify the freshness of information in networked systems, a novel metric, different from delay or latency, termed as “age of information” (AoI) has been introduced. In this thesis, we focus on characterizing and controlling age under various communication system setups. The first part of the thesis considers multiple access communication systems and comprises two papers. The first paper, investigates AoI in relation with throughput in a shared access setup with heterogeneous traffic. More specifically, we consider a shared access system consisting of a primary link and a network of secondary nodes, with multipacket reception (MPR) capabilities. To study the joint throughput-timeliness performance, we formulate two optimization problems considering both objectives and provide guidelines for the design of such a multiple access system satisfying both timeliness and throughput requirements. In the second paper, we study the AoI performance in various multiple access schemes, including scheduling and random access. We present an analysis of the AoI with and without packet management at the transmission queue of the source nodes, considering that packet management is the capability to replace unserved packets in the queue whenever newer ones arrive. We incorporate the effect of channel fading and network path diversity in such a system and provide simulation results that illustrate the impact of network operating parameters on the performance of the considered access protocols. The second part of the thesis considers the characterization of AoI and other freshness performance metrics in a point-to-point communication link, again comprising two papers. In the third paper of this thesis, we expand the concept of information ageing by introducing the cost of update delay (CoUD) metric to characterize the cost of having stale information at the destination. Furthermore, we introduce the value of information of update (VoIU) metric that captures the degree of importance of the update received at the destination. We employ queue-theoretic concepts and provide a theoretical analysis and insights into the prospects of cost and value. Finally, in the last paper, we study the properties of a sample path of the AoI process, and we obtain a general formula of its stationary distribution. We relate this result to a discrete time queueing system and provide a general expression of the generating function of AoI in relation with the system time, and the peak age of information (PAoI). To illustrate the applicability of the results, we analyze the AoI in single-server queues with different disciplines and assumptions. We build upon these results to provide a methodology for analyzing general non-linear age functions for this type of systems.

Download or read book Age of Information written by Yin Sun and published by Springer Nature. This book was released on 2022-06-01 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Information usually has the highest value when it is fresh. For example, real-time knowledge about the location, orientation, and speed of motor vehicles is imperative in autonomous driving, and the access to timely information about stock prices and interest rate movements is essential for developing trading strategies on the stock market. The Age of Information (AoI) concept, together with its recent extensions, provides a means of quantifying the freshness of information and an opportunity to improve the performance of real-time systems and networks. Recent research advances on AoI suggest that many well-known design principles of traditional data networks (for, e.g., providing high throughput and low delay) need to be re-examined for enhancing information freshness in rapidly emerging real-time applications. This book provides a suite of analytical tools and insightful results on the generation of information-update packets at the source nodes and the design of network protocols forwarding the packets to their destinations. The book also points out interesting connections between AoI concept and information theory, signal processing, and control theory, which are worthy of future investigation.

Download or read book Age of Information written by Antzela Kosta and published by Foundations and Trends in Networking. This book was released on 2017-11-28 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Age of Information is destined to become an important research topic in networked systems. This monograph provides the reader with an easy-to-read tutorial-like introduction into this novel approach of dealing with the freshness of information within systems.

Download or read book Systems Engineering for the Digital Age written by Dinesh Verma and published by John Wiley & Sons. This book was released on 2023-10-24 with total page 901 pages. Available in PDF, EPUB and Kindle. Book excerpt: Systems Engineering for the Digital Age Comprehensive resource presenting methods, processes, and tools relating to the digital and model-based transformation from both technical and management views Systems Engineering for the Digital Age: Practitioner Perspectives covers methods and tools that are made possible by the latest developments in computational modeling, descriptive modeling languages, semantic web technologies, and describes how they can be integrated into existing systems engineering practice, how best to manage their use, and how to help train and educate systems engineers of today and the future. This book explains how digital models can be leveraged for enhancing engineering trades, systems risk and maturity, and the design of safe, secure, and resilient systems, providing an update on the methods, processes, and tools to synthesize, analyze, and make decisions in management, mission engineering, and system of systems. Composed of nine chapters, the book covers digital and model-based methods, digital engineering, agile systems engineering, improving system risk, and more, representing the latest insights from research in topics related to systems engineering for complicated and complex systems and system-of-systems. Based on validated research conducted via the Systems Engineering Research Center (SERC), this book provides the reader a set of pragmatic concepts, methods, models, methodologies, and tools to aid the development of digital engineering capability within their organization. Systems Engineering for the Digital Age: Practitioner Perspectives includes information on: Fundamentals of digital engineering, graphical concept of operations, and mission and systems engineering methods Transforming systems engineering through integrating M&S and digital thread, and interactive model centric systems engineering The OODA loop of value creation, digital engineering measures, and model and data verification and validation Digital engineering testbed, transformation, and implications on decision making processes, and architecting tradespace analysis in a digital engineering environment Expedited systems engineering for rapid capability and learning, and agile systems engineering framework Based on results and insights from a research center and providing highly comprehensive coverage of the subject, Systems Engineering for the Digital Age: Practitioner Perspectives is written specifically for practicing engineers, program managers, and enterprise leadership, along with graduate students in related programs of study.

Download or read book Security and Privacy in Mobile Information and Communication Systems written by Andreas U. Schmidt and published by Springer. This book was released on 2012-08-20 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the thoroughly refereed post-conference proceedings of the fourth International ICST Conference on Security and Privacy in Mobile Information and Communication Systems (MOBISEC 2012) held in Frankfurt/Main, Germany, in June 2012. The 13 revised full papers were carefully selected from numerous submissions and cover the application layer of security, highlighting the practical importance of security of mobile devices in concrete usages. Contributions to MobiSec 2012 range from treatments on user privacy issues, over mobile application and app security, to mobile identity management, and NFC. With the orientation toward applications, MobiSec is a perfect interface between academia and industry in the field of mobile communications.

Download or read book Handbook of Mobile Data Privacy written by Aris Gkoulalas-Divanis and published by Springer. This book was released on 2018-10-26 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook covers the fundamental principles and theory, and the state-of-the-art research, systems and applications, in the area of mobility data privacy. It is primarily addressed to computer science and statistics researchers and educators, who are interested in topics related to mobility privacy. This handbook will also be valuable to industry developers, as it explains the state-of-the-art algorithms for offering privacy. By discussing a wide range of privacy techniques, providing in-depth coverage of the most important ones, and highlighting promising avenues for future research, this handbook also aims at attracting computer science and statistics students to this interesting field of research. The advances in mobile devices and positioning technologies, together with the progress in spatiotemporal database research, have made possible the tracking of mobile devices (and their human companions) at very high accuracy, while supporting the efficient storage of mobility data in data warehouses, which this handbook illustrates. This has provided the means to collect, store and process mobility data of an unprecedented quantity, quality and timeliness. As ubiquitous computing pervades our society, user mobility data represents a very useful but also extremely sensitive source of information. On one hand, the movement traces that are left behind by the mobile devices of the users can be very useful in a wide spectrum of applications such as urban planning, traffic engineering, and environmental pollution management. On the other hand, the disclosure of mobility data to third parties may severely jeopardize the privacy of the users whose movement is recorded, leading to abuse scenarios such as user tailing and profiling. A significant amount of research work has been conducted in the last 15 years in the area of mobility data privacy and important research directions, such as privacy-preserving mobility data management, privacy in location sensing technologies and location-based services, privacy in vehicular communication networks, privacy in location-based social networks, privacy in participatory sensing systems which this handbook addresses.. This handbook also identifies important privacy gaps in the use of mobility data and has resulted to the adoption of international laws for location privacy protection (e.g., in EU, US, Canada, Australia, New Zealand, Japan, Singapore), as well as to a large number of interesting technologies for privacy-protecting mobility data, some of which have been made available through open-source systems and featured in real-world applications.

Download or read book Age of Information written by Nikolaos Pappas and published by Cambridge University Press. This book was released on 2023-01-31 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive treatment of Age of Information, this cutting-edge text includes detailed exposition and real-world applications.

Download or read book Introduction to Communication Systems written by Upamanyu Madhow and published by Cambridge University Press. This book was released on 2014-11-24 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: An accessible undergraduate textbook introducing key fundamental principles behind modern communication systems, supported by exercises, software problems and lab exercises.

Download or read book Wireless Powered Backscatter Communications for Internet of Things written by Furqan Jameel and published by Springer Nature. This book was released on 2020-06-26 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides and assesses the techniques required for the realization of practical wireless-powered backscatter systems for large-scale and intelligent IoT networks. It explores the deployment, reliability, and security aspects of backscatter devices for both indoor and outdoor environments. The book also sheds light on some of the recently evolving technologies such as artificial intelligence/ machine learning, non-orthogonal multiple access (NOMA), and multi-tone carrier techniques and identifies their application in backscatter communications. In addition, it offers a valuable blueprint for future studies in the domains of intelligent reflective surfaces, ambient backscatter communications and massive IoT networks.

Download or read book Information Society in Global Age written by Feroz Khan and published by APH Publishing. This book was released on 2002-12 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Global Awareness written by Robert P. Clark and published by Rowman & Littlefield. This book was released on 2002 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book raises students' awareness and understanding of global trends, forces, and events by showing them how to think about the world systematically. Based on more than a decade of teaching about global issues to university undergraduates, the book focuses on understanding globalization and its effects on our lives. The book's seven chapters cover important principles and concepts from the systems perspective, such as what a system is, what global systems are, how and why systems grow and decline, what makes global systems invisible, how global issues are addressed as political questions, and others. Seven case studies apply these principles to global issues, such as the AIDS pandemic, endangered species and endangered languages, global energy systems and gasoline prices, contaminated food, and the consequences of the terrorist attacks of 9-11. The book includes two appendices: a glossary of important global system terms, and a description of global systems and cyberspace, including the structure and governance of the Internet.

Download or read book Public Administration in the Information Age Revisited written by I.Th.M. Snellen and published by IOS Press. This book was released on 2012-10-10 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The information age has become a reality, and has brought with it many implications for public administration. New ICT's offer new opportunities for government and governing, but at the same time they pose challenges in some key areas of public administration, like trust, or the idea of checks and balances. This book is an examination of the developments and effects of ICT in public administration over the last 10 to 15 years. It represents a re-visiting of the 1998 IOS Press publication ‘Public Administration in an Information Age: A Handbook’. As a point of departure, the authors of this new book have chosen the speed of the succession of theoretical approaches, represented by the 'phase of theories' which has appeared since 1998. This approach, which reflects that of the 1998 handbook, avoids the impression of technological determinism and provides an opportunity to focus on the phases of theory and technological developments. The book is divided into five sections. The first section examines key issues, and the second focuses on aspects of democracy. In the third section, the focus shifts towards structural conditions; the conditions that public administration has to meet in order to maintain its effectiveness and its legitimacy in the information age. Section four addresses some objects of implementation, like IT-inspired redesign, HRM and the phenomenon of Street Level Bureaucrats. Finally, the last section offers some concluding thoughts.

Download or read book Fundamentals of Wireless Communication written by David Tse and published by Cambridge University Press. This book was released on 2005-05-26 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook takes a unified view of the fundamentals of wireless communication and explains cutting-edge concepts in a simple and intuitive way. An abundant supply of exercises make it ideal for graduate courses in electrical and computer engineering and it will also be of great interest to practising engineers.

Download or read book Foundations of Semantic Communication Networks written by Walid Saad and published by Wiley-IEEE Press. This book was released on 2024-11-20 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive overview of the principles, theories, and techniques needed to build end-to-end semantic communication systems, with case studies included. In this rapidly evolving landscape, the integration of connected intelligence applications highlights the pressing need for networks to gain intelligence in a non-siloed and ad hoc manner. The traditional incremental approach to network design is no longer sufficient to support the diverse and dynamic requirements of these emerging applications. This necessitates a paradigm shift towards more intelligent and adaptive network architectures. From theory to application, Foundations of Semantic Communication Networks describes and provides a comprehensive understanding of everything needed to build end-to-end semantic communication systems. This book covers various interdisciplinary topics such as the mathematical foundations of semantic communications, information theoretical perspectives, joint-source channel coding, semantic-aware resource management strategies, interoperability under heterogeneous semantic communication users, advanced artificial intelligence (AI) and machine reasoning techniques for enabling connected intelligent applications, secure and privacy-preserving semantic communication systems, and the coexistence and interoperability of semantic, goal-oriented, and legacy systems. The book examines unique features of end-to-end networking with semantic communications, including instilling reasoning behaviors in communication nodes, the role of the semantic plane in information filtering, control of communication and computing resources, transmit and receive signaling schemes, and connected intelligence device control. It emphasizes the importance of data semantics and age of information metrics. The book also discusses the profound impact of semantic communications on the telecom industry, highlighting changes in network performance, resource management, traffic, as well as spectral and energy efficiency. Furthermore, the book provides insights into the mathematical constructs and AI theories for formulating semantic information, such as topology and category theory. It explores real-world applications, case studies, and future research directions as wireless technologies transition to 6G and beyond. Written by four recognized experts in the field with a wealth of expertise from academia, industry, and research institutions, Foundations of Semantic Communication Networks addresses sample topics, including: Novel Semantic Information Formulations: Proposing new formulations using rigorous mathematical frameworks such as category theory and algebraic topology. Practical Applications and Networking Features: Focusing on real-world scenarios, addressing multiple access and networking challenges through collaborative frameworks for multi-modal transmissions, examining multiple access schemes to enhance transmission efficiency, and ensuring coexistence with legacy systems. AI-Native Air Interface and Semantic-Aware Resource Allocation: Enabling efficient large-scale systems for 6G and beyond wireless systems through AI-native air interfaces and semantic-aware resource allocation strategies. Advanced AI and Machine Reasoning: Utilizing causality and neuro-symbolic artificial intelligence for minimalistic transmissions, and achieving generalizability and transferability across contexts and data distributions to develop high-fidelity semantic communication systems. Multi-Domain Security Vulnerabilities: Examining security vulnerabilities associated with deep neural networks in semantic communications, and proposing encrypted, privacy-preserving semantic communication systems (ESCS) as a solution. Foundations of Semantic Communication Networks is an excellent forward-thinking resource on the subject for readers with a strong background in the subject matter, including graduate-level students, academics, practitioners, and industry researchers.

Download or read book Law enforcement access to communication systems in the digital age written by United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Telecommunications and the Internet and published by . This book was released on 2004 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Report of the Commission to Assess the Threat to the United States From Electromagnetic Pulse Attack written by United States. Congress. House. Committee on Armed Services and published by Amicus. This book was released on 2005 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amicus Readers at level 1 include: a picture glossary, a table of contents, index, websites, and literacy notes located in the back of each book. Additionally, content words are introduced within the text supported by a variety of photo labels. In particle, this title describes a trip to the city and typical things one might do when visiting a large city. Includes visual literacy activity.

Download or read book The Evolution of Untethered Communications written by National Research Council and published by National Academies Press. This book was released on 1998-01-01 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to a request from the Defense Advanced Research Projects Agency, the committee studied a range of issues to help identify what strategies the Department of Defense might follow to meet its need for flexible, rapidly deployable communications systems. Taking into account the military's particular requirements for security, interoperability, and other capabilities as well as the extent to which commercial technology development can be expected to support these and related needs, the book recommends systems and component research as well as organizational changes to help the DOD field state-of-the-art, cost-effective untethered communications systems. In addition to advising DARPA on where its investment in information technology for mobile wireless communications systems can have the greatest impact, the book explores the evolution of wireless technology, the often fruitful synergy between commercial and military research and development efforts, and the technical challenges still to be overcome in making the dream of "anytime, anywhere" communications a reality.