Overview DVB-RCS: An Evolving Platform. for IP-based Services. Introduction to SatNEx. SatNEx. Evolving Broadband Market. Workpackage Structure

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1 DVB-RCS: for IP-based Services Gorry Fairhurst, Barry Evans, et al., SatNEx Consortium. Overview Introduction to SatNEx Evolving Broadband Market The Internet Protocol Satellite Trends Adaptive Waveforms Conclusions Questions & Answers DVB-RCS Symposium, ESTEC, NL, 9th September 2005 Introduction to SatNEx SatNEx SatNEx is a in Satellite Communications Coordinated by German Aerospace Center (DLR) 9 European Countries 22 Partners across Europe Promote SatCom for broadband services Connecting partners across Europe Integration and distance e-learning Workpackage Structure Evolving Broadband Market Assembly Steering Board Coordinator Management Committee Advisory Board WP 1000 Integrating Activities WP 2000 Jointly Executed Research WP 3000 Spreading of Excellence WP 4000 Network Management WP 1100 Research Coordination WP 1200 Integrated Research Tools & Testbeds WP 1300 Communication & Collaboration Platform WP 2100 Research Strategy & Visions WP 2200 System Studies WP 2300 Networking WP 3100 Training WP 3200 Dissemination & Knowledge Transfer WP 3300 Standardisation & Regulation WP 4100 Overall Coordination of the Joint Activities WP 4200 Project Admin & Controlling WP 1400 Personnel Exchange WP 2400 Access WP 1500 Integrated Management of Knowledge& IPR WP 2500 Research Trials DVB-RCS Symposium, 9th September

2 Roles and Competition Evolving Market Broadband satellite systems mainly serve 3 roles 1. Access technology 2. Content distribution: deliver content to the edge of access networks in a single hop 3. Trunk interconnection (backbone connectivity) Strong competition in each case: 1. Alternative last-mile technologies (xdsl, cable, fixed wireless etc) 2,3 From fibre Challenge to keep solution cost at comparable levels Traffic Growth Improved Systems New Services Advances in Technology Requirements IPv4 / IPv6 Services provided by the systems Network optimised for IP protocols Radio interface should be flexible to needs of Internet applications, whilst coping with challenges of radio link Integration of satcom in global telecom infrastructure User should have same experience in terms of service types and performance IPv6 is one of the corner stone technologies of eeurope * * IPv6 and Broadband EC IST IPv6 Cluster Evolving IP Services Evolving Service Model Internet access Web-surfing Multimedia (VoIP, TVoIP,...) IP networking (IPv6 in future) Device Mobility Content delivery Unicast Multicast Peer-to-peer Triple-Play Internet, VoIP, TVoIP DVB-RCS Symposium, 9th September

3 ETSI/BSM SI-SAP ETSI-BSM Work Satellite Dependent Satellite Independent IPV4 or IPV6 Satellite Independent Adaptation Functions SI-SAP Satellite Dependent Adaptation Functions Satellite Link Control (SLC) Satellite Medium Access Control (SMAC) Satellite Physical (SPHY) Satellite Independent Service Access Point Common system functions above SI-SAP Satellite-Independent Functions (at/above IP) Architecture (QoS; RRM interface; X-Layer; etc) QoS Addressing Security Multicast (2006) IPv6 (2006) IETF Standards Work Satellite Trends Internet Area ipdvb - IP over DVB ipv6 - IP Version 6 Working Group mip6/mip4/mipshop/nemo - Mobility Operations ipcdn - IP over Cable Data Network mboned - multicast deployment Transport tsvwg - QoS, TCP, SCTP, etc rohc - Robust Header Compression mmusic - Multiparty Multimedia Session Control rmt - reliable multicast transport Security ipsec & msec - IP (Multicast) Security Increasing appropriate to DVB-RCS! Next. Gen Satellites Regenerative OBP More Power Higher frequency bands (Ka-band) Spot beams and regenerative (OBP) satellites... Spot-Beams DVB-RCS Uplink DVB-S Downlink Hub On-board MPEG-2 TS multiplexor ATM mode in future DVB-RCS Symposium, 9th September

4 Adaptive Waveforms Traditional Link Design Waveform (modulation, coding) fixed at system design Engineered for worst-case propagation conditions All network traffic treated the same DVB-RCS Air Interfaces Native IP Air Interfaces DVB/MPEG-2 From the Digital Television Broadcast community Unidirectional (e.g., DVB-S/DVB-S2) With interaction channel Terrestrial return link (hybrid) Satellite return link (e.g., DVB-RCS) Hughes IPoS Alcatel s dedicated-ip Satellite DOCSIS : an adaptation of the cable modem standard to the satellite (Wildblue) IP-Star (little detail available) Next generation DVB-RCS? Advanced Coding/Modulation: DVB-S2 Optimal modulation depends on the E/No value FEC 1/2 9/10 DVB-S2 Waveform(s) Higher-order modulation Combines amplitude coding and phase modulation 16APSK > 16QAM in a non-linear environment - A small satellite output back-off (less than 1-2 db) Flexible (software) waveforms Modulation BPSK QPSK 8PSK 16APSK 32APSK Not a fixed configuration choice! DVB-RCS Symposium, 9th September

5 Adaptive Waveforms Allow waveform to be selected when provisioned: Terminal size / power Terminal location Traffic requirements (multi/uni-cast, QoS) etc Markets for DVB-S2 Next Generation Broadcast TV Services, using: DVB-S DVB-S2 backwards-compatible mode DVB-S2 Interactive Constant coding and modulation Adaptive coding and modulation Services: Digital TV Contribution & DSNG Professional Applications - Including Trunking & Point-2-Point services DVB-RCS Cross-Layer Optimisation Fade Mitigation Old approach: Optimise protocol layers one-at-a-time New approach: Look for/provide hints between layers Tune physical/link to network/traffic Hub Link Fading In-coming Signal Monitored Fading estimated, RCST signalled Transmit waveform adjusted IP QoS-support Challenges to Cross-Layer Hub Complexity v. Benefit trade-offs Simulation on vastly different time-scales Architectural implications Requires interfaces between layers Arriving Traffic Monitored QoS requirement booked / estimated Waveform adjusted Needs radio engineers to talk to protocol engineers!!!! FMT is a first step, expect more in the future! DVB-RCS Symposium, 9th September

6 Conclusions Conclusions Satellite a part of the next generation Internet A growing importance of the IP network-layer IPv4; IPv6; QoS; Multicast Next generation will utilise: Advanced physical layer technology Cross-layer optimisation New satellite designs Focus moving from systems to services Research is progressing in all these areas Thanks DLR AUTh BRU BUTE CNES CNIT FhI GET ICCS ISARS ISTI JSI RWTH TeSA TUG UCIIIM UniS UoA UoB UToV UVI Deutsches Zentrum für Luft- und Raumfahrt e.v., Germany Aristotle University of Thessaloniki, Greece University of Bradford, School of Informatics, UK Budapest University of Technology and Economics, Hungary Centre National d'etudes Spatiales, France Consorzio Nazionale Interuniversitario per le Telecomunicazioni, Italy Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung e.v., Germany Groupe des Ecoles des Télécommunications / Ecole Nationale Supérieure des Télécommunications, France Institute of Communication and Computer Systems of NTUA, Greece National Observatory of Athens, Greece Istituto di Scienze e Tecnologia dell'informazione, Italy Jozef Stefan Institute, Slovenia Rheinisch-Westfaelische Technische Hochschule Aachen, Germany Office National d'etudes et de Recherches Aérospatiales, France Technische Universitaet Graz, Austria Universidad Carlos III de Madrid, Spain University of Surrey, CCSR, UK University of Aberdeen, UK University of Bologna, Italy Universita Degli Studi Di Roma Tor Vergata, Italy Universidad De Vigo, Spain DVB-RCS Symposium, 9th September