International Workshop on
Satellite and Space Communications 2008

IWSSC 2008 tutorials on October 1st afternoon

Wednesday, October 1st , 2008, 14:00 - 15:30 Two tutorials in parallel tracks:
Wednesday, October 1st , 2008, 16:00 - 17:30 Two tutorials in parallel tracks:


IWSSC 2008 Tutorial 1 - Characterization and modelling of the LMS channel

October 1, 14:00 - 15:30, Room A

Fernando Perez-Fontan, University of Vigo, Spain

Abstract: The land mobile satellite propagation channel (LMS) is mainly impaired by shadowing and multipath, the same as conventional cellular channels, however it presents some particularities that make it necessary to study it on its own. A review of the channel modelling basics will be made before going on to analyze in detail its relevant features and application scenarios. Statistical and deterministic techniques will be addressed as well as the generation of synthetic time series for simulation purposes. Especial emphasis will be placed on how availability may be increased by using satellite diversity and gap-fillers. The satellite-to-indoor channel will also be studied in some detail. Other scenarios such the aeronautical mobile channel will also be discussed.

Biography: Fernando Pérez-Fontán. Born in Villagarcía de Arosa, Spain. He obtained his degree in Telecommunications Engineering in 1982 from the Technical University of Madrid and his PhD in 1992 from the same university. After working in industry since 1984 he became an assistant professor at the University of Vigo in 1988. In 1993 he became an associate professor and in 1999 a full professor at the Signal Theory and Communications Department of the University of Vigo. He lectures in Radiocommunication Systems, especially in terrestrial fixed and mobile system related topics. He is the author of a number of books and journal papers and has been the leader in several projects funded by public and private entities. He participates in ITU-R WG3 on Propagation Modeling. He has been Management Committee Member of EU' COST 255 and 280, and currently participates with the same role in COST 297.

IWSSC 2008 Tutorial 2 - Encapsulation matters: from MPE over ULE to GSE

October 1, 16:00 - 17:30, Room A

Bernhard Collini-Nocker, University of Salzburg, Austria

Abstract: Advanced modulation and coding schemes have the potential to optimally exploit signal quality at receivers and provide adaptive forward error correction when and to the extent needed. Consequently, data fields are of variable length - short when more FEC is required and longer when less FEC is necessary. On top of this base band layer a suitable, yet flexible and efficient encapsulation protocol should provide all reasonable functionality to allow for carriage of IP packets and other network layer packets, as well as support for bridging Ethernet frames of any kind. Whereas in the first generation DVB carriers only the MultiProtocol Encapsulation (MPE) is officially supported, the IETF Unidirectional Lightweight Encapsulation (ULE) has gained attractiveness and served as precursor for the Generic Stream Encapsulation, envisaged as encapsulation for all second generation DVB carriers. This tutorial will highlight the design issues for an encapsulation protocol, introduce MPE, provide the rationale for ULE, focus on the role of extension headers, and finally discuss in detail GSE and its fragmentation.

Biography: Bernhard Collini-Nocker received his master degree in Computing Sciences and Systems Analysis in 1993 and his doctor degree in Applied Informatics 1998. Since the early nineties he is university assistant and research associate responsible for technical activities in numerous ESA and EU funded projects. His research interests include multimedia networking, IP based multimedia protocols, applications over digital video broadcasting bearer and IP-multicast applications.

IWSSC 2008 Tutorial 3 - Satellite Networks I: Constellations

October 1, 14:00 - 15:30, Room B

Lloyd Wood, Cisco Systems Global Government Solutions Group, Bedfont Lakes, London

Abstract: A tutorial discussing and illustrating the geometrical and orbital choices for multiple satellites, and how these choices and the resulting satellite coverage and diversity play into system design choices for various satellite applications. This tutorial describes these choices for constellations for applications such as communication, positioning, and remote sensing, and highlights some of the tradeoffs that result from these choices. Live simulations of these constellations will be provided using the SaVi satellite simulation software (http://savi.sf.net/).

Biography: Lloyd Wood is a Chartered Engineer and a space initiatives manager in Cisco Systems' Global Goverment Solutions Group, where he has responsibility for CLEO, the Cisco router in Low Earth Orbit. Lloyd spent some years contributing to the Internet Engineering Task Force and modifying IOS, Cisco's router software... so he's gone on to fly his own code in space. Working with colleagues from NASA Glenn Research Center and Surrey Satellite Technology Ltd, Lloyd achieved the first tests from orbit of IPv6 and of the delay-tolerant networking bundle protocol. Lloyd gained his PhD from the Centre for Communication Systems Research at the University of Surrey, where he researched internetworking and satellite constellations.

IWSSC 2008 Tutorial 4 - Satellite Networks II: System Design and Applications

October 1, 16:00 - 17:30, Room B

Markus Werner, TriaGnoSys GmbH, Germany

Abstract: Key challenges for the deployment of reasonably tailored regional and global satellite systems are the system design and capacity dimensioning to meet the addressed scenario and targeted market/traffic requirements. In the first part, this tutorial presents a coherent methodology for the design and capacity dimensioning of a multiple spot-beam GEO satellite system targeting a generic multi-service communications market. The design considerations are then complemented by looking into some selected network design issues (routing, handover) for non-GEO satellite networks, based on the fundamental material presented in the tutorial Satellite Networks I: Constellations. In a second part, the tutorial highlights the use of current and emerging multi-regional or global satellite networks for selected markets, including aeronautical passenger communications, emerging satellite-based air traffic management, maritime passenger and cargo-tracking services, and land-mobile emergency communications. The concept of backhauling local wireless networks via satellite will be explained, being one way to achieve truly integrated terrestrial/satellite communications, and thus deemed to be a key factor to success of all such application scenarios. The tutorial concludes presenting some perspectives for the future of both tailored and integrated/multipurpose satellite networks.

Biography: Markus Werner received the Dipl.-Ing. degree from Darmstadt Technical University, Darmstadt, Germany, in 1991, and the Ph.D. degree from Munich Technical University, Munich, Germany, in 2002, both in electrical engineering. He is with TriaGnoSys GmbH, a satellite and aeronautical communications company, as managing director since 2002. From 1991 to 2005, he was with the Institute of Communications and Navigation of the German Aerospace Center (DLR) as research scientist, project manager and group leader. His project experience includes a range of national, ESA, and EU projects. He has been national delegate to the COST Actions 227, 252, and 272. In 2004 and 2005, he was project coordinator of the European Network of Excellence in Satellite Communications (SatNEx). His main R&D activities cover the broad range of modern satellite system design, including technical and business aspects, with some focus on multiservice traffic engineering, capacity dimensioning, and satellite-based systems and solutions for aeronautical and maritime services.




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