Vorträge des am 23./24. Oktober 1980 in München abgehaltenen Kongresses / Proceedings of a Congress Held in Munich, October 23/24, 1980
Author: W. Kaiser
Category: Technology & Engineering
Auf dem Gebiet der Nachrichtensatelliten hat sich eine ungewöhnlich steile Entwicklung vollzogen. Erst 15 Jahre ist es her, seitdem der er ste geostationäre Nachrichtensatellit mit einer maximalen Kapazität von damals nur 240 Fernsprechkanälen gestartet wurde, und inzwischen ist die Technik so weit fortgeschritten, daß der in Bälde den Betrieb aufnehmende neueste Typ, INTELSAT V, bereits 12 000 Fernsprechsignale und 2 Fernsehprogramme gleichzeitig übertragen kann. In Zukunft werden Nachrichtensatelliten mit noch größerer Leistung, scharf bündelnden Antennen, hoher Ausrichtgenauigkeit und flexiblen Möglichkeiten des Vielfachzugriffs die Erde umkreisen, wobei der Trend zu großen, auf Plattformen montierten Relaisstationen mit riesigen Solargeneratoren geht. Kommunikationssatelliten sind aber nicht nur zur Ubertragung von Fern sprech- und Fernsehsignalen geeignet, sondern werden immer stärker für die Daten- und Textkommunikation, für die elektronische Briefübermitt lung und für Konferenzschaltungen verwendet werden. Zu den vielfälti gen Einsatzfällen gehören auch die mobilen Dienste, die Verbindungen zu Schiffen und Flugzeugen und auch zwischen Satelliten umfassen. Darüber hinaus gibt es Satelliten zur Navigation und Erderkundung, ja selbst zur Gewinnung und elektrischen Ubertragung von Sonnenenergie zur Erde sind Satelliten im Gespräch.
This book provides up to date coverage of the basics of ATM and internet protocols, and characteristics of satellite networks and internetworking between satellite and terrestrial networks Satellite Networking: Principles and Protocols, Second Edition provides up to date information of the original topics in satellite networking and protocols focusing on Internet Protocols (IP) over satellites, broadband over satellites, next generation IP (IPv6) over satellites, new generation of DVB-S/S2 and DVB-RCS next generations and new services and applications. It also includes some analytical techniques for evaluation of end to end IP performance and QoS over satellite, reflecting the recent convergence of telecommunication, Internet, broadcasting and mobile networks. Topics new to this edition: Internetworking with MANET, DVB-S/S2 and DVB-RCS/RCS2 (including TCP/IP over DVB-S/RCS), recent developments in broadband satellite systems, convergence of services and network technologies (including Internet, telecom, mobile, TV, etc.), radio resource management, PEP, I-PEP, SCPS, traffic modelling and engineering with analysis and examples, and future developments of satellite networking. Provides up to date coverage of the basics of ATM and internet protocols, and characteristics of satellite networks and internetworking between satellite and terrestrial networks (e.g. mobile ad hoc networks), including coverage of new services and applications (e.g. Internet, telecom, mobile and TV) Discusses the real-time protocols including RTP, RTCP and SIP for real-time applications such as VoIP and MMC, and explains TCP/IP over satellite and evolution of IPv6 over satellite and beyond
This is a practical introduction to the key computing concepts of networks and communications, suitable for a first year undergraduate or industrial course. It provides the foundational knowledge on which to build a fully developed understanding of modern communications methodologies, techniques and standards. It will also be a useful professional reference companion.; The book begins with a general introduction to data communications and the options commonly open to the system designer. It then provides overviews of the key areas in which design decisions must be made: communication media; interface standards; network architectures; modems and multiplexers; network topologies, switching and access control; local area networks; wide-area networks; performance; software issues; security; and implementation.; As a second edition of an established text the book has been thoroughly revised and improved but retains the strengths of the first edition in its clear and well- illustrated exposition. It includes current developments in standards and architecture including ATM, B-ISDN, SNMP, TCP/IP, and other state-of-the- art features of the computer communications world.; In its first edition the book was an authoritative textbook and personal reference for industry. In this new edition it should be even more essential for all with a need for an accessible modern technical introduction to computer communications and networks. Suitable for a practically orientated computer science course at degree level or for an introductory industrial course.
Very small aperture terminals (VSATs) enable satellite transmission to provide data, voice and video communications directly to the user's premises. Networks using VSATs can be set up or changed rapidly in response to varying demands and as such look set to figure highly in the communications of the next century. In this long-awaited book, Everett collects 28 major contributions to describe the key technology, representative leading systems, technical issues and also consider the economics and regulations.
With a Preface by noted satellite scientist Dr. Ahmad Ghais, the Second Edition reflects the expanded user base for this technology by updating information on historic, current, and planned commercial and military satellite systems and by expanding sections that explain the technology for non-technical professionals. The book begins with an introduction to satellite communications and goes on to provide an overview of the technologies involved in mobile satellite communications, providing basic introductions to RF Issues, power Issues, link issues and system issues. It describes early commercial mobile satellite communications systems, such as Marisat and Marecs and their military counterparts. The book then discusses the full range of Inmarsat and other current and planned geostationary, low earth orbiting and hybrid mobile satellite systems from over a dozen countries and companies. It is an essential guide for anyone seeking a comprehensive understanding of this industry and military tool. • Revised edition will serve both technical and non-technical professionals who rely every day on mobile satellite communications • Describes and explains historic, current, and planned civil, commercial, and military mobile satellite communication systems. • First Edition charts and tables updated and expanded with current material for today’s mobile satellite technology
Since the publication of the best-selling first edition of the Satellite Communication Applications Handbook, the satellite industry has experienced explosive growth thanks to a flood of innovations in consumer electronics, broadcasting, the Internet, transportation, and broadband telecommunications. This second edition covers all the latest advances in satellite technology and applications and features new chapters on mobile digital audio radio and VSAT networks. It updates and expands upon the engineering and management topics that made the first edition a must-have for every satellite communications professional as well as network architects. Engineers get the latest technical details into operations, architectures, and systems components. Managers are brought up to date with the latest business applications as well as regulatory and legal decisions affecting domestic and international markets. the treatment is also of value to marketing, legal, regulatory, and financial and operations professionals who must gain a clear understanding of the capabilities and issues associated with satellite space and ground facilities and services.
Fundamentals and Systems Analysis for Global Connectivity
Author: Arun K. Majumdar
Publisher: Springer Nature
Category: Technology & Engineering
This book presents posits a solution to the current limitations in global connectivity by introducing a global laser/optical communication system using constellation satellites, UAVs, HAPs and Balloons. The author outlines how this will help to satisfy the tremendous increasing demand for data exchange and information between end-users worldwide including in remote locations. The book provides both fundamentals and the advanced technology development in establishing worldwide communication and global connectivity using, (I) All-Optical technology, and (ii) Laser/Optical Communication Constellation Satellites (of different types, sizes and at different orbits), UAVs, HAPs (High Altitude Platforms) and Balloons. The book discusses step-by-step methods to develop a satellite backbone in order to interconnect a number of ground nodes clustered within a few SD-WAN (software-defined networking) in a wide area network (WAN) around the world in order to provide a fully-meshed communication network. This book pertains to anyone in optical communications, telecommunications, and system engineers, as well as technical managers in the aerospace industry and the graduate students, and researchers in academia and research laboratory. Proposed a solution to the limitations in global connectivity through a global laser/optical communication system using constellation satellites, UAVs, HAPs and Balloons; Provides both fundamentals and the advanced technology development in establishing global communication connectivity using optical technology and communication constellation satellites; Includes in-depth coverage of the basics of laser/optical communication constellation satellites.