Transmission of variable bit rate video over an Orwell ring

Asynchronous Transfer Mode (ATM) is fast emerging as the preferred information transfer technique for future Broadband Integrated Services Digital Networks (BISON), offering the advantages of both the simplicity of time division circuit switched techniques and the flexibility of packet switched techniques. ATM networks with their inherent rate flexibility offer new opportunities for the efficient transmission of real time Variable Bit Rate (VBR) services over such networks. Since most services are VBR in nature when efficiently coded, this could in turn lead to a more efficient utilisation of network resources through statistical multiplexing. Video communication is typical of such a service and could benefit significantly if supported with VBR video over ATM networks. [Continues.

High efficiency, character-oriented, local area networks

Imperial Users onl

Journal of Telecommunications and Information Technology, 2018, nr 3

kwartalni

Radio Communications

In the last decades the restless evolution of information and communication technologies (ICT) brought to a deep transformation of our habits. The growth of the Internet and the advances in hardware and software implementations modified our way to communicate and to share information. In this book, an overview of the major issues faced today by researchers in the field of radio communications is given through 35 high quality chapters written by specialists working in universities and research centers all over the world. Various aspects will be deeply discussed: channel modeling, beamforming, multiple antennas, cooperative networks, opportunistic scheduling, advanced admission control, handover management, systems performance assessment, routing issues in mobility conditions, localization, web security. Advanced techniques for the radio resource management will be discussed both in single and multiple radio technologies; either in infrastructure, mesh or ad hoc networks

NASA SBIR abstracts of 1990 phase 1 projects

The research objectives of the 280 projects placed under contract in the National Aeronautics and Space Administration (NASA) 1990 Small Business Innovation Research (SBIR) Phase 1 program are described. The basic document consists of edited, non-proprietary abstracts of the winning proposals submitted by small businesses in response to NASA's 1990 SBIR Phase 1 Program Solicitation. The abstracts are presented under the 15 technical topics within which Phase 1 proposals were solicited. Each project was assigned a sequential identifying number from 001 to 280, in order of its appearance in the body of the report. The document also includes Appendixes to provide additional information about the SBIR program and permit cross-reference in the 1990 Phase 1 projects by company name, location by state, principal investigator, NASA field center responsible for management of each project, and NASA contract number

The production of digital public spaces

Digital media are noticeably changing the qualities of urban public spaces, which can no longer be considered a purely physical construct. Yet, the extent to which contemporary digital media can be used to promote other forms of spatial agency remains a critical issue. Whereas the impact of technology from a macro perspective offers a globalizing and homogenizing image, its role in the production of space at a local scale is less clear (Kirsch 1995). The aim of this study is to argue for digital public spaces as a concrete programme to support the articulation of a third notion of public space that emerges at the interface of physical–digital hybrid spaces (Stikker 2013). The project for digital public spaces is posed as one that pursues enabling citizens’ rights to participation and appropriation (Purcell 2002) of physical–digital hybrid spaces. It is argued that while physical and digital spaces do not stand in opposition, their operational models do not fit seamlessly either. Therefore, the research is particularly concerned with how to design for the conditions that allow a dialogical relation between physical and digital features of space, and enable citizens to actively participate in the production of physical–digital hybrid spaces, and for which a dialectical mode of analysis is required. Following a cumulative narrative, the study explores different characterizations of digital public spaces, which have been articulated through design-led action research projects conducted in collaboration with academia, creative industries, citizens and public authorities. The study accomplishes a novel application of the unitary theory of space proposed by the Marxist French philosopher and sociologist, Henri Lefebvre (1992), which is revisited to develop a novel framework to reveal the social production of physical–digital hybrid spaces. The framework is developed through practice, and extensively applied throughout the thesis illustrating three distinctive dominating perspectives of physical–digital hybrid spaces: substitution, co-evolution and recombination (Graham 1998). The framework has proved to be a flexible and insightful method of analysis that: enables approaching the social production of physical and digital spaces individually and in relation to one another; to understand how different spatial configurations allow for participation and appropriation; and in turn, to re-contextualize the right to the city (Lefebvre 1996) in digital public spaces

Modelling, Dimensioning and Optimization of 5G Communication Networks, Resources and Services

This reprint aims to collect state-of-the-art research contributions that address challenges in the emerging 5G networks design, dimensioning and optimization. Designing, dimensioning and optimization of communication networks resources and services have been an inseparable part of telecom network development. The latter must convey a large volume of traffic, providing service to traffic streams with highly differentiated requirements in terms of bit-rate and service time, required quality of service and quality of experience parameters. Such a communication infrastructure presents many important challenges, such as the study of necessary multi-layer cooperation, new protocols, performance evaluation of different network parts, low layer network design, network management and security issues, and new technologies in general, which will be discussed in this book

The survey on Near Field Communication

PubMed ID: 26057043Near Field Communication (NFC) is an emerging short-range wireless communication technology that offers great and varied promise in services such as payment, ticketing, gaming, crowd sourcing, voting, navigation, and many others. NFC technology enables the integration of services from a wide range of applications into one single smartphone. NFC technology has emerged recently, and consequently not much academic data are available yet, although the number of academic research studies carried out in the past two years has already surpassed the total number of the prior works combined. This paper presents the concept of NFC technology in a holistic approach from different perspectives, including hardware improvement and optimization, communication essentials and standards, applications, secure elements, privacy and security, usability analysis, and ecosystem and business issues. Further research opportunities in terms of the academic and business points of view are also explored and discussed at the end of each section. This comprehensive survey will be a valuable guide for researchers and academicians, as well as for business in the NFC technology and ecosystem.Publisher's Versio