ETSI EN 301 790 V1.3.1 (2003-03)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digitalna videoradiodifuzija (DVB) – Povratni kanal za satelitske distribucijske sistemeDigital Video Broadcasting (DVB); Interaction channel for satellite distribution systems33.170Televizijska in radijska difuzijaTelevision and radio broadcasting33.070.40SatelitSatelliteICS:Ta slovenski standard je istoveten z:EN 301 790 Version 1.3.1SIST EN 301 790 V1.3.1:2003en01-december-2003SIST EN 301 790 V1.3.1:2003SLOVENSKI
STANDARD
ETSI ETSI EN 301 790 V1.3.1 (2003-03)2
Reference REN/JTC-DVB-138 Keywords broadcasting, DVB, interaction, satellite ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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© European Telecommunications Standards Institute 2003. © European Broadcasting Union 2003. All rights reserved.
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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.11 4.1 Protocol stack model.11 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.15 6.1.3 Burst synchronization.16 6.1.4 Symbol clock synchronization.16 6.2 Burst format.16 6.2.1 Traffic (TRF) burst formats.16 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.17 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.29 6.6.1.3 Mini-slot method.29 6.6.1.4 Contention based mini-slot method.29 6.6.2 Data Unit Labelling Method (DULM).30 6.6.2.1 DULM with ATM-formatting.30 6.6.2.2 DULM with MPEG-formatting.32 SIST EN 301 790 V1.3.1:2003

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6.6.3 Mini-slot method.33 6.6.4 Contention based mini-slot method.34 6.7 Multiple access.34 6.7.1 MF-TDMA.34 6.7.1.1 Fixed MF-TDMA.34 6.7.1.2 Dynamic MF-TDMA (Optional).34 6.7.1.3 Frequency range.35 6.7.2 Segmentation of the return link capacity.35 6.7.2.1 Superframes.35 6.7.2.2 Frames.36 6.7.2.3 Timeslots.37 6.8 Capacity request categories.37 6.8.1 Continuous Rate Assignment (CRA).37 6.8.2 Rate Based Dynamic Capacity (RBDC).37 6.8.3 Volume Based Dynamic Capacity (VBDC).38 6.8.4 Absolute Volume Based Dynamic Capacity (AVBDC).38 6.8.5 Free Capacity Assignment (FCA).38 7 Synchronization procedures.38 7.1 Overall events sequencing.38 7.2 Initial synchronization procedure.40 7.3 Logon procedure.41 7.4 Coarse synchronization procedure (optional).42 7.5 Fine synchronization procedure (optional).43 7.6 Synchronization maintenance procedure.44 7.7 Logoff procedure.44 7.7.1 General.44 7.7.2 Normal.44 7.7.3 Abnormal.44 8 Control and management.45 8.1 Protocol stack.45 8.1.1 RCST Type A (IP).45 8.1.2 Optional RCST Type B (Native ATM).48 8.2 RCST addressing.48 8.3 Forward link signalling.48 8.3.1 General SI tables.48 8.3.1.1 Superframe Composition Table (SCT).49 8.3.1.2 Frame Composition Table (FCT).49 8.3.1.3 Time-Slot Composition Table (TCT).49 8.3.1.4 Satellite Position Table (SPT).49 8.3.1.5 Correction Message Table (CMT).49 8.3.1.6 Terminal Burst Time Plan (TBTP).49 8.3.2 Terminal Information Message (TIM).49 8.3.3 PCR Insertion TS Packet.49 8.3.4 Summary.50 8.3.5 Repetition rates.50 8.4 Return link signalling.50 8.4.1 RCST synchronization and Identification messages.50 8.4.2 Configuration parameters between RCST and NCC (optional).51 8.4.3 Other messages for network management (optional).51 8.4.4 Burst time plan exchange.52 8.5 Coding of SI for forward link signalling.52 8.5.1 Introduction.52 8.5.2 SI table mechanism.52 8.5.3 DSM-CC section mechanism.53 8.5.4 Coding of PID and table_id fields.53 8.5.5 Table definitions.53 8.5.5.1 Standard section headers.53 8.5.5.1.1 SI section header.54 8.5.5.1.2 DSM-CC private section header.55 8.5.5.2 Superframe Composition Table (SCT).56 SIST EN 301 790 V1.3.1:2003

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8.5.5.3 Frame Composition Table (FCT).58 8.5.5.4 Timeslot Composition Table (TCT).60 8.5.5.5 Satellite Position Table (SPT).63 8.5.5.6 PCR Insertion Transport Stream packet.63 8.5.5.6.1 TS packet format.64 8.5.5.6.2 Adaptation field.64 8.5.5.6.3 Optional payload field.65 8.5.5.7 Terminal Burst Time Plan (TBTP).66 8.5.5.8 Terminal Information Message (TIM).67 8.5.5.9 Correction Message Table (CMT).69 8.5.5.10 descriptor coding.71 8.5.5.10.1 descriptor identification and location.71 8.5.5.10.2 Network Layer Info descriptor (optional).71 8.5.5.10.3 Correction Message descriptor.72 8.5.5.10.4 Logon Initialize descriptor.74 8.5.5.10.5 ACQ Assign descriptor.75 8.5.5.10.6 SYNC Assign descriptor.76 8.5.5.10.7 Encrypted Logon ID descriptor.77 8.5.5.10.8 Echo Value descriptor.78 8.5.5.10.9 Linkage descriptor (private data).78 8.5.5.10.10 RCS content descriptor.80 8.5.5.10.11 Satellite forward link descriptor.81 8.5.5.10.12 Satellite return link descriptor.83 8.5.5.10.13 Table Update descriptor.84 8.5.5.10.14 Contention control descriptor.85 8.5.5.10.15 Correction COntrol descriptor.85 8.5.5.10.16 Forward Interaction Path descriptor.86 8.5.5.10.17 Return Interaction Path descriptor.87 8.5.5.10.18 Connection Control descriptor (optional).89 8.5.5.11 Accessing of the forward link signalling.89 8.5.5.12 RCS Map Table.93 9 Security, identity, encryption.94 9.1 Authentication.95 9.2 Forward link.95 9.3 Return link.95 9.4 Security (optional).95 9.4.1 Cryptographic primitives.96 9.4.1.1 Public key exchange.96 9.4.1.2 Hashing.97 9.4.1.3 Encryption.97 9.4.1.4 Pseudo-random numbers.97 9.4.2 Main Key Exchange (MKE).98 9.4.3 Quick Key Exchange (QKE).99 9.4.4 Explicit Key Exchange (EKE).99 9.4.5 Key derivation.99 9.4.6 Data stream processing.100 9.4.6.1 Payload streams.100 9.4.6.2 Data encryption.100 9.4.6.3 Encryption flags.100 9.4.6.4 Chaining and initialization vector.101 9.4.7 Security establishment.101 9.4.8 Persistent state variables.102 9.4.8.1 Guaranteed delivery.102 9.4.9 Security MAC messages.102 9.4.9.1 Security Sign-On.102 9.4.9.2 Security Sign-On Response.103 9.4.9.3 Main Key Exchange.104 9.4.9.4 Main Key Exchange Response.104 9.4.9.5 Quick Key Exchange.105 9.4.9.6 Quick Key Exchange Response.105 9.4.9.7 Explicit Key Exchange.106 SIST EN 301 790 V1.3.1:2003

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9.4.9.8 Explicit Key Exchange Response.106 9.4.9.9 Wait.107 Annex A (informative): Compliance table.108 Annex B (informative): Bibliography.109 History.110
ETSI ETSI EN 301 790 V1.3.1 (2003-03)7
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). All published ETSI deliverables shall include information which directs the reader to the above source of information. 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: 7 March 2003 Date of latest announcement of this EN (doa): 30 June 2003 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 December 2003 Date of withdrawal of any conflicting National Standard (dow): 31 December 2003
ETSI ETSI EN 301 790 V1.3.1 (2003-03)8
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. 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 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 - Part 1: Systems". [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". SIST EN 301 790 V1.3.1:2003

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[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 (1996): "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". 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the following term and definition applies: 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) Natm Number of ATM cells in an ATM TRF burst (1, 2 or 4). Nmpeg Number of MPEG packets in an optional MPEG2-TS TRF burst (1, 2 × n for n = 1 to 12). Np,atm Number of bytes of the optional prefix used on ATM TRF bursts (0, 2 or 4). Np,sync Number of bytes of the optional SAC field used on SYNC bursts, after randomization and including optional CRC: 0, 2…31 for concatenated code, 0, 12 or 16 for the Turbo code (see clause 6.4). SIST EN 301 790 V1.3.1:2003

ETSI ETSI EN 301 790 V1.3.1 (2003-03)10 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: AAL ATM Adaptation Layer ACQ Acquisition burst ATM Asynchronous Transfer Mode AVBDC Absolute Volume-Based Dynamic Capacity BCD Binary Coded Decimal BTP Burst Time Plan CBC Cipher Block Chaining CMF Control and Monitoring Functions CMT Correction Message Table 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 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 MAC Medium Access Control MandC Monitoring and Control
MF-TDMA Multiple-Frequency Time-Division Multiple Access MIB Management Information Base MKE Main Key Exchange 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 OSI Open Systems Interconnection PAT Program Association Table PC Personal Computer PCR Program Clock Reference SIST EN 301 790 V1.3.1:2003

ETSI ETSI EN 301 790 V1.3.1 (2003-03)11 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 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. SIST EN 301 790 V1.3.1:2003

ETSI ETSI EN 301 790 V1.3.1 (2003-03)12 Access mechanismPacket structureHigher mediumlayersProprietary layersNetwork DependentProtocolsNetwork IndependentProtocolsSynchronizationModulationChannel codingFreq. RangeFilteringPower Figure 1: Layer structure for generic system reference model The present document addresses the satellite interactive network dependent aspects only. 4.2 System model Figure 2 shows the system model which is to be used within DVB for interactive services. In the system model, two channels are established between the service provider and the user: • Broadcast Channel: a unidirectional broadband Broadcast Channel including video, audio and data is established from the service provider to the users. It may include the Forward Interaction Path. • Interaction Channel: a bi-directional Interaction Channel is established between the service provider/user and the user for interaction purposes. It is formed by: - Return Interaction Path (Return Channel): from the user to the service provider. It is used to make requests to the service provider/user, to answer questions or to transfer data. - Forward Interaction Path: from the service provider to the user. It is used to provide information from the service provider/user to the user(s) and any other required communication for the interactive service provision. It may be embedded into the Broadcast Channel. It is possible that this channel is not required in some simple implementations which make use of the Broadcast Channel for the carriage of data to the user. The RCST is formed by the Network Interface Unit (consisting of the Broadcast Interface Module and the Interactive Interface Module) and the Set Top Unit. The RCST provides interface for both Broadcast and Interaction Channels. The interface between the RCST and the interaction network is via the Interactive Interface Module. SIST EN 301 790 V1.3.1:2003

ETSI ETSI EN 301 790 V1.3.1 (2003-03)13 Return Channel Satellite Terminal (RCST) Figure 2: A generic system reference model for interactive systems 4.3 Reference model of the Satellite Interactive Network An overall Satellite Interactive Network, within which a large number of Return Channel Satellite Terminal (RCST) will operate, will comprise the following functional blocks, as shown in figure 3: - Network Control Centre: a NCC provides Control and Monitoring Functions (CMF). It generates control and timing signals for the operation of the Satellite Interactive Network to be transmitted by one or several Feeder Stations. - Traffic Gateway: a TG receives the RCST return signals, provides accounting functions, interactive services and/or connections to external public, proprietary and private service providers (data bases, pay-per-view TV or video sources
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