SIST EN 301 790 V1.4.1:2006

SLOVENSKI STANDARD
01-marec-2006
Digitalna videoradiodifuzija (DVB) – Povratni kanal za satelitske distribucijske
sisteme
Digital Video Broadcasting (DVB); Interaction channel for satellite distribution systems
Ta slovenski standard je istoveten z: EN 301 790 Version 1.4.1
ICS:
33.070.40 Satelit Satellite
33.170 Televizijska in radijska Television and radio
difuzija broadcasting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)

Digital Video Broadcasting (DVB);
Interaction channel for satellite distribution systems

European Broadcasting Union Union Européenne de Radio-Télévision
EBU·UER
2 ETSI EN 301 790 V1.4.1 (2005-09)

Reference
REN/JTC-DVB-169
Keywords
broadcasting, DVB, interaction, satellite
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2005.
© European Broadcasting Union 2005.
All rights reserved.
TM TM TM
DECT , PLUGTESTS and UMTS are Trade Marks of ETSI registered for the benefit of its Members.
TM
TIPHON and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI
3 ETSI EN 301 790 V1.4.1 (2005-09)
Contents
Intellectual Property Rights.7
Foreword.7
1 Scope.8
2 References.8
3 Definitions, symbols and abbreviations .9
3.1 Definitions.9
3.2 Symbols.9
3.3 Abbreviations.10
4 Reference models for satellite interactive networks in DVB .12
4.1 Protocol stack model.12
4.2 System model.12
4.3 Reference model of the Satellite Interactive Network.13
5 Forward link.14
6 Return link base-band physical layer specification and multiple access definition .15
6.1 RCST synchronization.15
6.1.1 Timing control.15
6.1.2 Carrier synchronization.16
6.1.3 Burst synchronization.16
6.1.4 Symbol clock synchronization.17
6.2 Burst format.17
6.2.1 Traffic (TRF) burst formats .17
6.2.1.1 ATM TRF burst .17
6.2.1.2 Optional MPEG2-TS TRF burst .17
6.2.2 Synchronization and acquisition burst formats.18
6.2.2.1 Synchronization (SYNC) burst format.18
6.2.2.2 Acquisition (ACQ) burst .18
6.2.3 Common Signalling Channel (CSC) burst format .19
6.2.4 Bit numbering and interpretation.20
6.2.5 Transmission order.20
6.3 Randomization for energy dispersal.21
6.4 Coding.21
6.4.1 CRC error detection code .21
6.4.2 Reed-Solomon outer coding .22
6.4.3 Convolutional inner coding .22
6.4.4 Turbo code.23
6.4.4.1 Description of the turbo code permutation.24
6.4.4.2 Determination of the circulation states.25
6.4.4.3 Rates and puncturing map.25
6.4.4.4 Order of transmission and mapping to QPSK constellation.26
6.5 Modulation.27
6.5.1 Bit mapping to QPSK constellation.27
6.5.2 Baseband shaping and quadrature modulation.27
6.5.3 EIRP control.28
6.5.4 Guard time.28
6.6 MAC messages.28
6.6.1 Methods based on the Satellite Access Control (SAC) field .28
6.6.1.1 SAC field composition.28
6.6.1.2 Prefix method mechanism.31
6.6.1.3 Mini-slot method.31
6.6.1.4 Contention based mini-slot method.31
6.6.1.5 MPEG Adaptation Field Method (MPAF) (option) .31
6.6.2 Data Unit Labelling Method (DULM).32
6.6.2.1 DULM with ATM-formatting.33
ETSI
4 ETSI EN 301 790 V1.4.1 (2005-09)
6.6.2.2 DULM with MPEG-formatting.35
6.7 Multiple access.36
6.7.1 MF-TDMA.37
6.7.1.1 Fixed MF-TDMA.37
6.7.1.2 Dynamic MF-TDMA (Optional).37
6.7.1.3 Frequency range.37
6.7.2 Segmentation of the return link capacity .38
6.7.2.1 Superframes.38
6.7.2.2 Frames.39
6.7.2.3 Timeslots.39
6.8 Capacity request categories .40
6.8.1 Continuous Rate Assignment (CRA).40
6.8.2 Rate Based Dynamic Capacity (RBDC) .40
6.8.3 Volume Based Dynamic Capacity (VBDC) .40
6.8.4 Absolute Volume Based Dynamic Capacity (AVBDC) .40
6.8.5 Free Capacity Assignment (FCA).40
7 Synchronization procedures.41
7.1 Overall events sequencing.41
7.2 Initial synchronization procedure .43
7.3 Logon procedure.44
7.4 Coarse synchronization procedure (optional).45
7.5 Fine synchronization procedure (optional).45
7.6 Synchronization maintenance procedure.46
7.7 Logoff procedure.47
7.7.1 General.47
7.7.2 Normal.47
7.7.3 Abnormal.47
8 Control and management.47
8.1 Protocol stack.47
8.1.1 RCST Type A (IP).48
8.1.2 Optional RCST Type B (Native ATM).50
8.2 RCST addressing.50
8.3 Forward link signalling .51
8.3.1 General SI tables.51
8.3.1.1 Superframe Composition Table (SCT).51
8.3.1.2 Frame Composition Table (FCT).51
8.3.1.3 Time-Slot Composition Table (TCT).51
8.3.1.4 Satellite Position Table (SPT).51
8.3.1.5 Correction Message Table (CMT) .51
8.3.1.6 Terminal Burst Time Plan (TBTP).52
8.3.2 Terminal Information Message (TIM).52
8.3.3 PCR Insertion TS Packet .52
8.3.4 Summary.52
8.3.5 Repetition rates.52
8.4 Return link signalling.53
8.4.1 RCST synchronization and Identification messages.53
8.4.2 Configuration parameters between RCST and NCC (optional).53
8.4.3 Other messages for network management (optional).54
8.4.4 Burst time plan exchange.54
8.5 Coding of SI for forward link signalling .54
8.5.1 Introduction.54
8.5.2 SI table mechanism.55
8.5.3 DSM-CC section mechanism.55
8.5.4 Coding of PID and table_id fields .55
8.5.5 Table definitions.55
8.5.5.1 Standard section headers.56
8.5.5.1.1 SI section header.56
8.5.5.1.2 DSM-CC private section header.57
8.5.5.2 Superframe Composition Table (SCT).58
8.5.5.3 Frame Composition Table (FCT).60
ETSI
5 ETSI EN 301 790 V1.4.1 (2005-09)
8.5.5.4 Timeslot Composition Table (TCT).62
8.5.5.5 Satellite Position Table (SPT).65
8.5.5.6 PCR Insertion Transport Stream packet.65
8.5.5.6.1 TS packet format .66
8.5.5.6.2 Adaptation field.66
8.5.5.6.3 Optional payload field .67
8.5.5.7 Terminal Burst Time Plan (TBTP).68
8.5.5.8 Terminal Information Message (TIM) .69
8.5.5.9 Correction Message Table (CMT) .71
8.5.5.10 Descriptor coding.73
8.5.5.10.1 Descriptor identification and location .73
8.5.5.10.2 Network Layer Info descriptor (optional).73
8.5.5.10.3 Correction Message descriptor .74
8.5.5.10.4 Logon Initialize descriptor.76
8.5.5.10.5 ACQ Assign descriptor.78
8.5.5.10.6 SYNC Assign descriptor.79
8.5.5.10.7 Encrypted Logon ID descriptor .80
8.5.5.10.8 Echo Value descriptor .80
8.5.5.10.9 Linkage descriptor (private data).81
8.5.5.10.10 RCS content descriptor.82
8.5.5.10.11 Satellite forward link descriptor .83
8.5.5.10.12 Satellite return link descriptor .85
8.5.5.10.13 Table Update descriptor.86
8.5.5.10.14 Contention control descriptor .87
8.5.5.10.15 Correction Control descriptor.88
8.5.5.10.16 Forward Interaction Path descriptor .88
8.5.5.10.17 Return Interaction Path descriptor.89
8.5.5.10.18 Connection Control descriptor (optional).91
8.5.5.11 Accessing of the forward link signalling.91
8.5.5.12 RCS Map Table.95
8.5.5.13 Transmission Mode Support Table .96
9 Security, identity, encryption .97
9.1 Authentication.98
9.2 Forward link.98
9.3 Return link.98
9.4 Security (optional).98
9.4.1 Cryptographic primitives.99
9.4.1.1 Public key exchange.99
9.4.1.2 Hashing.99
9.4.1.3 Encryption.100
9.4.1.4 Pseudo-random numbers.101
9.4.1.5 Padding.101
9.4.2 Main Key Exchange (MKE) .102
9.4.3 Quick Key Exchange (QKE) .103
9.4.4 Explicit Key Exchange (EKE).103
9.4.5 Key derivation.103
9.4.6 Data stream processing .104
9.4.6.1 Payload streams.104
9.4.6.2 Data encryption.104
9.4.6.3 Encryption flags.104
9.4.7 Security establishment.105
9.4.8 Persistent state variables .106
9.4.8.1 Guaranteed delivery.107
9.4.9 Security MAC messages.107
9.4.9.1 Security Sign-On.107
9.4.9.2 Security Sign-On Response.109
9.4.9.3 Main Key Exchange .110
9.4.9.4 Main Key Exchange Response .110
9.4.9.5 Quick Key Exchange .111
9.4.9.6 Quick Key Exchange Response.111
9.4.9.7 Explicit Key Exchange .112
ETSI
6 ETSI EN 301 790 V1.4.1 (2005-09)
9.4.9.8 Explicit Key Exchange Response.113
9.4.9.9 Wait.113
9.5 Transport of security messages (optional).113
Annex A (informative): Compliance table.115
Annex B (informative): Bibliography.116
History .117

ETSI
7 ETSI EN 301 790 V1.4.1 (2005-09)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by Joint Technical Committee (JTC)
Broadcast of the European Broadcasting Union (EBU), Comité Européen de Normalisation ELECtrotechnique
(CENELEC) and the European Telecommunications Standards Institute (ETSI).
NOTE: The EBU/ETSI JTC Broadcast was established in 1990 to co-ordinate the drafting of standards in the
specific field of broadcasting and related fields. Since 1995 the JTC Broadcast became a tripartite body
by including in the Memorandum of Understanding also CENELEC, which is responsible for the
standardization of radio and television receivers. The EBU is a professional association of broadcasting
organizations whose work includes the co-ordination of its members' activities in the technical, legal,
programme-making and programme-exchange domains. The EBU has active members in about
60 countries in the European broadcasting area; its headquarters is in Geneva.
European Broadcasting Union
CH-1218 GRAND SACONNEX (Geneva)
Switzerland
Tel: +41 22 717 21 11
Fax: +41 22 717 24 81
Founded in September 1993, the DVB Project is a market-led consortium of public and private sector organizations in
the television industry. Its aim is to establish the framework for the introduction of MPEG-2 based digital television
services. Now comprising over 200 organizations from more than 25 countries around the world, DVB fosters
market-led systems, which meet the real needs, and economic circumstances, of the consumer electronics and the
broadcast industry.
National transposition dates
Date of adoption of this EN: 26 August 2005
Date of latest announcement of this EN (doa): 30 November 2005
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 May 2006
Date of withdrawal of any conflicting National Standard (dow): 31 May 2006

ETSI
8 ETSI EN 301 790 V1.4.1 (2005-09)
1 Scope
The present document forms the specification for the provision of the interaction channel for GEO satellite interactive
networks with fixed Return Channel Satellite Terminals (RCST). The present document facilitates the use of RCSTs for
individual or collective installation (e.g. SMATV) in a domestic environment. It also supports the connection of such
terminals with in-house data networks. The present document may be applied to all frequency bands allocated to GEO
satellite services.
The solutions provided for interaction channel for satellite interactive networks are a part of a wide set of alternatives to
implement interactive services through Digital Video Broadcasting (DVB) systems.
The revision accomplished in 2002 provides the means to extend the applicability of the standard to regenerative
satellite systems. This revision also allows for reduction in terminal costs without significantly impacting the
performance.
The revision accomplished in 2004 integrates the DVB-S2 standard for forward link transmission. DVB-S2 is the
second generation standard for satellite transmission, which provides higher power and bandwidth efficiency as well as
adaptive coding and modulation.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
[1] ETSI EN 300 421: "Digital Video Broadcasting (DVB); Framing structure, channel coding and
modulation for 11/12 GHz satellite services".
[2] ETSI TR 101 202: "Digital Video Broadcasting (DVB); Implementation guidelines for Data
Broadcasting".
[3] ETSI ETS 300 802: "Digital Video Broadcasting (DVB); Network-independent protocols for DVB
interactive services".
[4] ETSI EN 300 468: "Digital Video Broadcasting (DVB); Specification for Service Information (SI)
in DVB systems".
[5] ETSI EN 301 192: "Digital Video Broadcasting (DVB); DVB specification for data broadcasting".
[6] ETSI EN 301 459: "Satellite Earth Stations and Systems (SES); Harmonized EN for Satellite
Interactive Terminals (SIT) and Satellite User Terminals (SUT) transmitting towards satellites in
geostationary orbit in the 29,5 GHz to 30,0 GHz frequency bands covering essential requirements
under article 3.2 of the R&TTE Directive".
[7] IETF RFC 2684 (1999): "Multiprotocol Encapsulation over ATM Adaptation Layer 5".
[8] ETSI TR 100 815: "Digital Video Broadcasting (DVB); Guidelines for the handling of
Asynchronous Transfer Mode (ATM) signals in DVB systems".
[9] ISO/IEC 13818-1 (1996): "Information technology - Generic coding of moving pictures and
associated audio information: Systems".
ETSI
9 ETSI EN 301 790 V1.4.1 (2005-09)
[10] ETSI TR 101 154: "Digital Video Broadcasting (DVB); Implementation guidelines for the use of
MPEG-2 Systems, Video and Audio in satellite, cable and terrestrial broadcasting applications".
[11] ITU-T Recommendation Q.2931 (1995): "Digital Subscriber Signalling System No. 2 -
User-Network Interface (UNI) layer 3 specification for basic call/connection control".
[12] IEEE 802.3: "Information technology - Telecommunications and information exchange between
systems - Local and metropolitan area networks - Specific requirements -
Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and
Physical Layer Specifications".
[13] ITU-T Recommendation I.432 (all parts): "B-ISDN user-network interface - Physical layer
specification".
[14] ETSI ES 200 800: "Digital Video Broadcasting (DVB); DVB interaction channel for Cable TV
distribution systems (CATV)".
[15] IETF RFC 2104 (1997): "HMAC: Keyed-Hashing for Message Authentication".
[16] ANSI/IEEE 754 (1985): "IEEE Standard for Binary Floating-Point Arithmetic".
[17] ISO/IEC 13818-6 (1998): "Information technology - Generic coding of moving pictures and
associated audio information - Part 6: Extensions for DSM-CC".
[18] ITU-T Recommendation I.363-5 (1996): "B-ISDN ATM Adaptation Layer specification: Type 5
AAL".
[19] ETSI EN 302 307: "Digital Video Broadcasting (DVB); Second generation framing structure,
channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering
and other broadband satellite applications".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
reserved: when used in the clauses defining the coded bit stream, indicates that the value may be used for future
extensions
NOTE: The value of reserved bits follows EN 300 468 [4] except in encrypted DVB-RCS specific messages as
explicitly stated in clause 8.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
× multiplication
^ power
~ concatenation
mod modulo division
(unsigned char)x ANSI C cast operator: converts value x to unsigned char
"" empty string (zero length)
nonce1 random string (NCC)
nonce2 random string (RCST)
N Number of ATM cells in an ATM TRF burst (1, 2 or 4).
atm
N Number of MPEG packets in an optional MPEG2-TS TRF burst (1, 2 × n for n = 1 to 12).
mpeg
N Number of bytes of the optional prefix used on ATM TRF bursts (0, 2 or 4).
p,atm
ETSI
10 ETSI EN 301 790 V1.4.1 (2005-09)
N Number of bytes of the optional SAC field used on SYNC bursts, after randomization and
p,sync
including optional CRC: 0, 2…31 for concatenated code, 0, 12 or 16 for the Turbo code (see
clause 6.4).
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AAL ATM Adaptation Layer
ACM Adaptive Coding and Modulation
ACQ ACQuisition burst
ATM Asynchronous Transfer Mode
AUU ATM User-to-ATM-User
AVBDC Absolute Volume-Based Dynamic Capacity
BAT Bouquet Association Table
BCD Binary Coded Decimal
BTP Burst Time Plan
CBC Cipher Block Chaining
CCM Constant Coding and Modulation
CMF Control and Monitoring Functions
CMT Correction Message Table
CNI Carrier to Noise plus Interference ratio
CPCS-PDU Common Part Convergence Sublayer Protocol Data Unit
CR Capacity Requests
CRA Constant-Rate Assignment
CRC Cyclic Redundancy Check
CRSC Circular Recursive Systematic Convolutional
CSC Common Signalling Channel
CTRL/MNGM Control/Management virtual channel used in DULM
DES Data Encryption Standard
DSM-CC Digital Storage Medium - Command and Control
DULM Data Unit Labelling Method
DVB Digital Video Broadcast
DVB-S Digital Video Broadcast by Satellite
nd
DVB-S2 Digital Video Broadcasting - Satellite transmission 2 generation
EIT Event Information Table
EKE Explicit Key Exchange
FCA Free Capacity Assignment
FCT Frame Composition Table
FLS Forward Link Signalling
GEO Geostationary Earth Orbit
GFC Generic Flow Control
HMAC Hash-based Message Authentication Code
I In-phase
ID IDentifier
IDU InDoor Unit
IE Information Element
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronics Engineers
IP Internet Protocol
ISDN Integrated Services Digital Network
ISO International Standards Organization
ITU International Telecommunication Union
IV Initialization Vector
LFSR Linear Feedback Shift Register
LLC Logical Link Control
LSB Least Significant Bit
M&C Monitoring and Control
MAC Medium Access Control
MF-TDMA Multiple-Frequency Time-Division Multiple Access
MIB Management Information Base
ETSI
11 ETSI EN 301 790 V1.4.1 (2005-09)
MKE Main Key Exchange
MPAF MPEG Adaptation Field method
MPEG Moving Picture Experts Group
MSB Most Significant bit
NCC Network Control Centre
NCR Network Clock Reference
NIT Network Information Table
NIU Network Interface Unit
ODU Outdoor unit
OPCR Original Program Clock Reference
OSI Open Systems Interconnection
PAT Program Association Table
PC Personal Computer
PCR Program Clock Reference
PID Packet IDentifier
PMT Program Map Table
ppm parts per million
PRBS Pseudo Random Binary Sequence
PRNG Pseudo-Random Number Generator
PSI Program Specific Information
PSTN Public Switched Telephone Network
PVC Permanent Virtual Circuit
Q Quadrature
QKE Quick Key Exchange
QPSK Quadrature Phase-Shift Keying
RBDC Rate-Based Dynamic Capacity
RCST Return Channel Satellite Terminal
RMT RCS Map Table
RS Reed-Solomon
SAC Satellite Access Control
SAR Segmentation And Re-assembly
SCT Superframe Composition Table
SDT Service Description Table
SI Service Information
SIT Satellite Interactive Terminal
SMATV Satellite Master Antenna Television
SNAP Sub Network Access Protocol
SNMP Simple Network Management Protocol
SPT Satellite Position Table
SUT Satellite User Terminal
SVC Switched Virtual Circuit
SYNC SYNChronization burst type
TBTP Terminal Burst Time Plan
TCT Time-slot Composition Table
TDMA Time-Division Multiple Access
TG Traffic Gateway
TIM Terminal Information Message
TRF Traffic (burst type)
TS Transport Stream
Tx Transmitter
UNI User Network Interface
VBDC Volume-Based Dynamic Capacity
VCI Virtual Circuit Identifier
VPI Virtual Path Identifier
ETSI
12 ETSI EN 301 790 V1.4.1 (2005-09)
4 Reference models for satellite interactive networks in
DVB
4.1 Protocol stack model
For interactive services supporting broadcast to the end user with return channel, a simple communications model
consists of the following layers:
physical layer: where all the physical (electrical) transmission parameters are defined.
transport layer: defines all the relevant data structures and communication protocols like data containers, etc.
application layer: is the interactive application software and runtime environment (e.g. home shopping application,
script interpreter, etc.).
A simplified model of the OSI layers was adopted to facilitate the production of specifications for these layers. Figure 1
points out the lower layers of the simplified model and identifies some of the key parameters for the lower two layers.
Proprietary layers
Network Independent
Higher medium
Protocols
layers
Access mechanism
Packet
...