This conference volume contains the papers of the working conference 'Data Networks and Satellites', held on September 20th and 21st, 1982, in Cologne. The conference was performed by the interest group 'Computer Net w 0 r k s " j us t founded by the co mm itt e e 3/4 of the G e sell s c h aft fUr Informatik (GI) and the committees 6, 9, and 12 of the Nachrichten technische Gese11schaft (NTG). It was hosted by the Deutsche For sChungs- und Versuchsansta1t fUr Luft- und Raumfahrt at Cologne. The idea of the conference was to bring together experts from satel lite communication research and development, from telecommunication authorities and from the user community. The fast evolution of sa tellites designed to be used for new data communication services in fluences the necessity to exchange the present knowledge on chances, challenges, and problems of future satellite based data communication systems and services. Within this young te1ematics discipline only few groups in Europe can report on extensive experiences. Therefore we are glad that some of the most advanced activities and plans in Europe could be presented here at their current status. Some rather valuable information has been transferred during the in tensive discussions, and we try to summarize some important aspects of each session within the volume in hand.

Inhalt
Content.- I Opening Speech.- Design Considerations for Data Networking via Satellite Systems.- II Protocols.- Satellite Link Communication Protocols.- The Levels of the OSI Reference Model and their Application for Concatenating Qualitatively Differing Networks.- Modelling Assignment Procedures and Link Control Procedures as a Queueing Network.- III Gateways/Network Access.- Packet Satellite Technology Reference Sources.- Transport Protocol Performance over Concatenated Local Area and Satellite Networks.- The ESA Satellite Communications Controller.- Dynamic Bandwidth Allocation in a TDMA-System.- Discussion of Session II and III.- IV Computer Communications via Satellites.- Computer Communications through Telecommunications Satellite Systems The NADIR Project.- Impact of Satellite Technoloy on Transmission Protocols.- Interconnecting DANUBE Networks through Satellite Links.- High Speed File Transfer, Point to Point and Multipoint, Using Satellite Links.- V Applications.- STELLA: Results of Two Years of Operation for Megabit/Sec Data Transmission.- The Newspaper Arrives by Satellite Experience in Full Page Transmission of the Financial Times from London to Frankfurt am Main via Satellite.- Applications for Specialized Satellite Systems in Europe.- VI Services.- TELECOM I A National Satellite for Domestic and Business Services.- Future Services of the Deutsche Bundespost for High Speed Data Communication.- Discussion of Sessions IV, V, and VI.- VII Final Panel Discussion.- Data Communication Networks via Satellites Part of Integrated Communication Services.