BS-EN-50478-2007.pdf
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1、BRITISH STANDARD BS EN 50478:2007 Functional receiver specification of satellite digital interactive television with a low data rate return channel via satellite Modem layer specification The European Standard EN 50478:2007 has the status of a British Standard ICS 33.060.30; 33.170 ? Licensed Copy:
2、London South Bank University, London South Bank University, Sun Apr 01 14:52:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 50478:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 2007 ISBN 978 0 580 50441 9 National
3、 foreword This British Standard was published by BSI. It is the UK implementation of EN 50478:2007. The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment. A list of organizations represented on EPL/100 can be obtained
4、on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. Date
5、Comments Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:52:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 50478 NORME EUROPENNE EUROPISCHE NORM February 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de
6、 Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50478:2007 E ICS 33.060.30; 33.170 En
7、glish version Functional receiver specification of satellite digital interactive television with a low data rate return channel via satellite - Modem layer specification Spcification pour le fonctionnement du rcepteur pour la tlvision interactive par satellite avec une voie de retour bas dbit par sa
8、tellite - Spcification du modem de la couche Funktionale Empfngerspezifikation fr digitales interaktives Satellitenfernsehen mit Rckkanal niedriger Datenrate ber Satellit - Festlegungen Modemschicht This European Standard was approved by CENELEC on 2006-06-01. CENELEC members are bound to comply wit
9、h the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretari
10、at or to any CENELEC member. This European Standard exists in two official versions (English and German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official
11、 versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Ro
12、mania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:52:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50478:2007 2 Foreword This European Standard was prepared by the Technical Commit
13、tee CENELEC TC 206, Consumer equipment for entertainment and information and related sub-systems. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50478 on 2006-06-01. The following dates were fixed: latest date by which the EN has to be implem
14、ented at national level by publication of an identical national standard or by endorsement (dop) 2007-09-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-06-01 _ Licensed Copy: London South Bank University, London South Bank University, Sun Apr 0
15、1 14:52:21 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 3 EN 50478:2007 Contents Introduction.7 1 Scope .9 2 Normative references .9 3 Definitions, symbols and abbreviations.9 3.1 Definitions9 3.2 Symbols.10 3.3 Abbreviations.11 3.4 Reference Model for Satellite Interactive Networks.13 3.4.1 Protocol
16、Stack Model13 3.4.2 System Model.14 3.4.3 Reference System Architecture for SATMODE 15 4 Terminal forward link interface18 4.1 Broadcast Interface .18 4.1.1 Frequency.18 4.1.2 Modulation/Coding18 4.1.3 Symbol rate.18 4.1.4 Polarization.18 4.2 Forward Interaction Path.18 4.2.1 Forward Interactive Tra
17、ffic Data18 4.2.2 Forward Link signalling.19 5 Terminal return link interface 22 5.1 General22 5.1.1 Access Method.22 5.1.2 Network.24 5.1.3 Beams.24 5.1.4 Carrier groups.24 5.1.5 Services25 5.1.6 Classes of service and priority25 5.1.7 Usage of return link physical resources25 5.2 Physical Layer In
18、terface27 5.2.1 Return link synchronisation.27 5.2.2 Return Link Coding and Modulation37 5.2.3 Frequency and time structuring 50 5.2.4 Power mask55 5.2.5 Polarisation Return Link SATMODE terminal .56 5.2.6 Return Link Symbol rate .56 5.2.7 Power Spectral Control.56 5.2.8 Programmability, range and g
19、ranularity of configurable parameters.57 5.3 Data Link Layer Interface 58 5.3.1 Return Data Link Layer and Protocols Stack58 5.3.2 Description of the MAC protocol.67 6 Security, authentication, encryption75 7 Software download.76 Annex A (normative) Description of tables syntax.77 Annex B (normative
20、) Definition terminal processing delay Dproc_term95 Annex C (informative) Typical implementation examples96 Annex D (informative) SATMODE Project.112 Bibliography114 Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:52:21 GMT+00:00 2007, Uncontrolled Copy, (c)
21、BSI EN 50478:2007 4 Figures Figure 1 Layer structure for generic system reference model13 Figure 2 A generic system Reference Model for Interactive Systems .14 Figure 3 Overall system description of SATMODE16 Figure 4 Interactive traffic data17 Figure 5 Tables of PAT, PMT descriptors22 Figure 6 Time
22、 and frequency Slotted Aloha.23 Figure 7 Organisation of the network and spectral resources .26 Figure 8 Description of delays between SATMODE terminal and HUB.28 Figure 9 Forward link signalling parameters29 Figure 10 Frame start origin 30 Figure 11 Terminal Operation32 Figure 12 Login Procedure35
23、Figure 13 TX pointing procedure.36 Figure 14 Waveform generation37 Figure 15 Randomizer.38 Figure 16 CRC calculation.38 Figure 17 Flexible encoder architecture 39 Figure 18 Equivalent scheme for mode 1 (PCCC).39 Figure 19 Equivalent scheme for mode 2 (SCCC).40 Figure 20 Equivalent scheme for mode 3
24、(CC)40 Figure 21 Equivalent scheme for mode 4 (QRCC)40 Figure 22 Logical implementation of a programmable CC.41 Figure 23 CC, ring quaternary mode.43 Figure 24 Mapping of bits45 Figure 25 UW Sequence .49 Figure 26 Organization of time slots50 Figure 27 State chart for content lost packets .52 Figure
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