Docstoc

Satellite - Mobile Broadcasting

Document Sample
Satellite - Mobile Broadcasting Powered By Docstoc
					TM 2582


   Satellite - Mobile Broadcasting

  44th Meeting of the Technical Module
           of the DVB Project

          Geneva, 21st of November 2001
              Satellite - Mobile Broadcasting
                                    Overview
   Operational & Planned Systems Worldwide :
     WorldSpace : 1st Satellite Digital Sound Broadcasting (S-DSB)
     
     operator, with 2 operational L band (1.4 GHz) satellites (AfriStar &
     AsiaStar) and a 3rd (AmeriStar) planned for launch in 2002
            Digital Systems DH and DS defined in Recommendation ITU-R BO.1130-4

     XM Satellite Radio and Sirius Satellite Radio : each offers seamless
     
     mobile services (SDARS1) throughout the USA in S band (2.3 GHz)
            Time magazine named XM a « 2001 Invention of the Year »
            XM ’s technology is from WorldSpace

     Mobile Broadcasting Corp. : recently announced plans to launch
     
     satellite mobile broadcasting services in Japan in S band (2.6 GHz)

     Alcatel & WorldSpace, with Fraunhofer IIS as technology partner,
     
     forming a consortium of industrial & multimedia players to provide L
     band mobile broadcasting services to Europe starting in 2004
                               1   SDARS :Satellite Digital Audio Radio Service, US/FCC term for
              Satellite - Mobile Broadcasting
                         Markets and Services
   Market Goals :
        Direct digital delivery of audio and multimedia content via satellite and
         terrestrial means to consumers in a mobile environment
      Seamless coverage solutions for national & international broadcasters
      Large number of channels




   Enhanced Broadcasting Services Will Include :
      Real-time broadcasts and « push & store » services offering radio « on
       demand » by local interactivity
      Unique, new formats to address niche markets

      Pan-European coverage with multilingual programs

      Multimedia services (telematics applications, video clips, weather, alert
       messages, push IP solutions, news, traffic information...)
      Interactivity through cellular links
             Satellite - Mobile Broadcasting
                Markets and Services (continued)
   S-DSB is a Mass Market Application :
      8 car & truck makers and 17 receiver makers currently factory-install
       and/or manufacture S-DSB receivers for the US market
      Major surveys in the U.S.A. and Europe validate market for seamless

       satellite/terrestrial radio services
      ASMS-TF (Advanced Satellite Mobile Systems - Task Force), backed

       by ESA & the EC, has identified a significant market opportunity for
       seamless European mobile multimedia & broadcasting services
      Interoperability is possible with DVB, DAB and Mobile Communication

       Networks


   S-DSB Business Model :
        Multiple revenue streams including leasing, advertisements, and
         subscription sales for new services
          S-DSB System Concept


   Introduction to Hybrid Concept

   Comparison With Other Systems

   Key Features
                     Hybrid System Approach

                            Spatial diversity (2 active) satellites for
                            better service availability



                                          rural
                                          area



                                urban
                                center


                                                               Diversity combining of satellite
                                                               and (weak) terrestrial signal
                                         sub-urban




Terrestrial repeaters for
areas with low satellite                              Satellite offers large coverage areas
signal availability                                   ("European coverage")
                                                      High link margin to cope with tree
                                                      shadowing
                       S-DSB Hybrid Approach
                        Versus Other Systems

                                                                                                 Mobile reception for
Spectrum                                        Allowed                                            terrestrial single
efficiency          High power efficiency       delay                                            frequency networks
                    for Satellite waveform      spread
        DVB-T                                                                EU147
        (64-QAM)                                          DVB-T
                                                                                                        S-DSB-
                                                                                                        TERR


     S-DSB-
     TERR                        S-DSB-                                                   Mobile reception of
                                 SAT                                                       satellite signals
              DVB-T
              (QPSK)
                              DVB-S                   DVB-S1
     EU147
                                                                                                          S-DSB-
                                                                                                          SAT
                   Total power efficiency                                                  Allowed vehicle
                   (including power amplifier                                              speed (L-Band)
                   efficiency)

                                                          1) Note: high vehicle speed is possible for
                                                          DVB-S in case of LOS reception
                   S-DSB System Features

Time Space Codes          The Information is Spread in Space and Time by:
                               Long time interleaver
                               Spatial diversity using 2 satellites at different orbit
                                positions (optionally, system can use 1 Satellite only)
                               Efficient diversity combining technology
High Satellite Power      Power Efficient Satellite Waveform / QPSK TDM
Efficiency                     Good Eb/N0 performance (2.4dB for AWGN channel)
                               Low crest factor -> Efficient use of satellite power
Multipath Resistant       Full Mobile Reception / OFDM
Terrestrial Waveform           High Doppler spread
                               High delay spread
High System Capacity      Efficient Source Coding
                               US SDARS systems: More than 200 audio programs
                                in 25MHz bandwidth
             Interworking Between S-DSB
                  and DVB Standard
European Market is            SDARS Systems Need Adaptation for European
Different from US Market       Market
                                   Different marketing requirements (to be discussed
                                    with DVB-CM)
                                   Better synergy/interoperability with other systems
                                   Compatibility with frequency planning (e.g. CEPT,
                                    Wiesbaden conference) is a key requirement
Packetized Data Stream        Data Packets Concept is Already Used
                                   Packet size can be adapted to MPEG transport
                                    stream characteristics to make systems
                                    compatible at multiplex layer
                                        High reuse of technology possible
                                        Short time-to-market
MPEG 4 Based                  Streaming of Audio and Data is the Main
                               Application

     DVB-S, DVB-C, DVB-T         S-DSB = DVB-“Satellite Mobile Broadcasting" ?
                Satellite Mobile Broadcasting
                                 Conclusion

            Satellite Mobile Broadcasting Concept is Consistent
                     With the New DVB Vision (DVB v2)

   It Will Serve the Following Key Objectives:
        Enhanced mobile broadcasting services
        National and pan European coverage
        Mass market
        Short time-to-market

   It Will Benefit From Field Proven Technology Under Development Worldwide

   Opportunity for DVB Project to initiate a Satellite Mobile Broadcasting Ad
    Hoc Group
   For Further Information Please Contact:
      Christian Combe
                 Christian.Combe@space.alcatel.fr
                 Phone: +33 5 3435 5083
      Hugues Salord

                 hsalord@worldspace.com
                 Phone: +33 1 4284 3898
      Albert Heuberger

                 heb@iis.fhg.de
                  Phone: +49 9131 776 6300
       Ernst Eberlein
                 ebl@iis.fhg.de
                  Phone: +49 9131 776 6320

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:8
posted:8/14/2011
language:English
pages:11