EN 50478:2007

Introduction
1 Scope
2 Normative references
3 Definitions, symbols and abbreviations
  3.1 Definitions
  3.2 Symbols
  3.3 Abbreviations
  3.4 Reference Model for Satellite Interactive Networks
      3.4.1 Protocol Stack Model
      3.4.2 System Model
      3.4.3 Reference System Architecture for SATMODE
4 Terminal forward link interface
  4.1 Broadcast Interface
      4.1.1 Frequency
      4.1.2 Modulation/Coding
      4.1.3 Symbol rate
      4.1.4 Polarization
  4.2 Forward Interaction Path
      4.2.1 Forward Interactive Traffic Data
      4.2.2 Forward Link signalling
5 Terminal return link interface
  5.1 General
      5.1.1 Access Method
      5.1.2 Network
      5.1.3 Beams
      5.1.4 Carrier groups
      5.1.5 Services
      5.1.6 Classes of service and priority
      5.1.7 Usage of return link physical resources
  5.2 Physical Layer Interface
      5.2.1 Return link synchronisation
      5.2.2 Return Link Coding and Modulation
      5.2.3 Frequency and time structuring
      5.2.4 Power mask
      5.2.5 Polarisation Return Link SATMODE terminal
      5.2.6 Return Link Symbol rate
      5.2.7 Power Spectral Control
      5.2.8 Programmability, range and granularity of
            configurable parameters
  5.3 Data Link Layer Interface
      5.3.1 Return Data Link Layer and Protocols Stack
      5.3.2 Description of the MAC protocol
6 Security, authentication, encryption
7 Software download
Annex A (normative) Description of tables syntax
Annex B (normative) Definition terminal processing delay
                      D[proc_term]
Annex C (informative) Typical implementation examples
Annex D (informative) SATMODE Project
Bibliography

This standard applies for the interaction channel for interactive television networks using Geostationary Satellites with fixed return channel satellite terminals via low data rate dedicated return link. It specifies the essential elements for the implementation of the interaction channel.