1、ETS 300 802 November 1997 Source: EBU/CENELEC/ETSI JTC Reference: DE/JTC-DVB-25 ICs: 33.020 Key words: DVB, broadcasting, digital, video, TV, MPEG, protocol European Broadcasting Uni Union Europenne de Radio-Tlvision Dkring Digital Video Broadcasting (DVB); Network-independent protocols for DVB inte
2、ractive services ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat etsi.fr Tel
3、.: +33 4 92 94 42 O0 - Fax: +33 4 93 65 47 16 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. O European Telecommunications Standards Institute 1997. O European Broadcasting
4、 Union 1997. All rights reserved. STD.ETS1 ETS 300 802-ENGL 1777 1111 34001955 0241714 O58 M Page 2 ETS 300 802: November 1997 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerni
5、ng its accuracy, please write to “ETSI Editing and Committee Support Dept.“ at the address shown on the title page. . STD-ETSI ETS 300 802-ENGL 1797 I3400855 U241715 T74 = Page 3 ETS 300 802: November 1997 Contents Foreword . .-_ 5 . Scope . 7 Normative references . ._._. 7 Abbreviations . 8 . Proto
6、col stack and system models 9 4.1 Protocol stack model 9 4.2 System model . _ 1 O 4.3 Logical model . 11 Protocol stacks 14 5.1 S1 - Broadcast or Narrowcast Content - audio, video, data . 14 5.2 S2 - ACD/ACD and DDC between Server and STB 15 5.3 5.4 5.5 S3 - Session control signalling . 16 S4 - Conn
7、ection control signalling . 17 S5 - Capability Transfer and Network Management 17 PPP data link setup . 18 6.1 PPP configuration for IP transmission . 18 Network congestion control 18 Session control in DVB interactive services . .- 18 8.1 Introduction 18 8.2 Session establishment 18 Session release
8、 . 19 8.3 8.4 Status inquiry . 20 8.5 Connection reset 20 Annex A (informative): Bibliography 21 History . 22 STD.ETS1 ETS 300 802-ENGL 1997 H 3400855 024L72b 920 H Page 5 ETC 300 802: November 1997 Foreword This European Telecommunication Standard (ETS) has been produced by the Joint Technical Comm
9、ittee (JTC) of the European Broadcasting Union (EBU), Comit Europen de Normalisation ELECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI). NOTE: The EBU/ETSI JTC was established in 1990 to co-ordinate the drafting of standards in the specific field of broadcastin
10、g and related fields. Since 1995 the JTC 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
11、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 Ancienne Route 17A CH-1218 GRAND SACONN
12、EX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 Digital Video Broadcasting (DVB) Project 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 intr
13、oduction of MPEGQ based digital television services. Now comprising over 200 organizations from more than 25countries around the world, DVB fosters market-led systems, which meet the real needs, and economic circumstances, of the consumer electronics and the broadcast industry. Transposition dates D
14、ate of adoption: Date of latest announcement of this ETS (doa): 5 September 1997 28 February 1998 Date of latest publication of new National Standard or endorsement of this ETS (dop/e): 31 August 1998 Date of withdrawal of any conflicting National Standard (dow): 31 August 1998 Previous page is blan
15、k STD-ETSI ETS 300 602-ENGL 1997 3400855 02q3737 8b7 Page 7 ETS 300 802: November 1997 1 Scope This ETS covers the core Digital Video Broadcasting (DVB) requirements to enable interactive services supporting broadcasting to the home with narrowband return channels (see annex A: Bibliography - “DVB c
16、ommercial requirements“). The system defined in this ETS provides a generic solution for a variety of future interactive services, through the adoption of DSM-CC User-to-User, Download and Object Carousel protocols, as specified in TR 101 194 2. The interactive services are provided on systems consi
17、sting of a high bitrate downstream channel (up to the maximum bitrate of the Broadcast channel) from the Service Providers to Service consumers and low bitrate interaction channels (up to 150 kbit/s). The Broadcast Service Provider and the Interactive Service Provider need not operate from the same
18、location. The services are primarily digital video broadcast enhanced with interactivity. At the simplest level the Interactive channel allows the consumer to react by voting, to order articles displayed in the broadcast programme, to select certain programme bouquets or to choose movies in near-vid
19、eo-on-demand systems. It is also possible to deliver text, graphics, audio and still pictures (including e-mail) on-demand, although this may require an interactive channel with higher bitrates. There are many possible network configurations covering the currently specified DVB broadcast options inc
20、luding satellite, terrestrial, cable, SMATV and MMDS in conjunction with PSTN, ISDN, cable and other Interactive channel options. The network dependent protocols are specified in ETS 300 800 3, ETS 300 801 4, ETS 300 803 5. The implications for interactive services via these types of networks will b
21、e described in a separate guidelines document TR 101 194 2 which will also summarize the functionality of the protocols identified in this ETS. 2 Normative references This ETS incorporates by dated and undated reference, provisions from other publications. These normative references are cited at the
22、 appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest edition of the publication re
23、ferred to applies. 31 (41 51 i71 ISO/IEC 1381 8-6: “Information Technology: Coding of moving pictures and associated audio - Part 6 - Digital Storage Media Command and Control (DSM-CC)“. TR 101 194: “Digital Video Broadcasting (DVB); Guidelines for the use of the DVB network-independent protocols fo
24、r interactive services“. ETS 300 800: “Digital Video Broadcasting (DVB); DVB interaction channel through CATV Networks“. ETS 300 801 : “Digital Video Broadcasting (DVB); DVB interaction channel through PSTN/ISDN“. prETS 300 803: “Digital Video Broadcasting (DVB); DVB interaction channel for Satellit
25、e Master Antenna TV distribution systems (SMAN)“. prEN 300 468: “Digital Video Broadcasting (DVB); Specification for Service Information (SI) in DVB streams“. ETR 21 1 : “Digital Video Broadcasting (DVB); Guidelines for the Implementation and Usage of Service Information (SI) in DVB streams“. prEN 3
26、01 192: “Digital Video Broadcasting (DVB); Specification for Data Broadcasting Services in DVB“. Previous page is blank Page 8 ETS 300 802: November 1997 191 RFC 768 (UDP): “User Datagram Protocol“, J. Postel, 28.08.1980. 1 o1 RFC 791 (IP): “Internet Protocol“, J. Postel, 01.09.1 981. 111 RFC 793 (T
27、CP): “Transmission Control Protocol“, J. Postel, 01.09.1981. RFC 1332 (IPCP): “The PPP Internet Protocol Control Protocol“, G. McGregor, 26.05.1992. i31 RFC 1661 (PPP): “The Point-to-Point Protocol“, W. Simpson, 21.07.1994. i 41 RFC 1662: “PPP in HDLC-like Framing“, W. Simpson, 21.07.1994. 11 51 RFC
28、 1700: “Assigned Numbers“, J. Reynolds, J. Postel, 20.10.1994. “Universal Network Object Specification“, Version 1 .O (identical to OMG-UNO Specification for CORBA 2.0). RFC 1717 (MP): “The PPP Multilink Protocol“, K. Sklower, B. Lloyd, G. McGregor, D. Carr, T. Coradetti, 16.08.96. 3 Abbreviations F
29、or the purposes of this ETS, the following abbreviations apply: AAL ACD/ACD API ARP ASN. 1 ATM BER CATV CHAP CPU DAVIC DDC DSM-CC DSM-CC U-N DSM-CC U-U DVB HDLC IEEE llOP IOR IP IPCP ISDN LCP LLC MAC MATV MIB MMDS MP MPEG MPEG TS MTU NSAP os I PAP PPP PSTN ATM Adaptation Layer Application Control Da
30、tdApplication Communication Data Application Programming Interface Address Resolution Protocol Abstract Syntax Notation 1 (one) Asynchronous Transfer Mode Basic Encoding Rules Community Antenna TeleVision Challenge Handshake Authentication Protocol Central Processing Unit Digital Audio Vlsual Counci
31、l Data Download Control Digital Storage Media - Command and Control DSM-CC User-to-Network DSM-CC User-to-User Digital Video Broadcasting High Level Data Link Control Institute of Electrical and Electronic Engineers (US) Internet lnter-ORB Protocol Interoperable Object Reference I nt ernet Protocol
32、Internet Protocol Control Protocol Integrated Services Digital Network Link Control Protocol Link Layer Control Medium Access Control Master Antenna TeleVision Management Information Base Multipoint Microwave Distribution System Multilink Point-to-Point Protocol (PPP) Moving Picture Experts Group MP
33、EG Transport Stream Multiport Transceiver Unit Network Services Access Point Open Systems Interconnection Password Authentication Protocol Point-to-Point Protocol Public Switched Telephone Network RFC RPC RTP SI SIS SMATV SNAP SNMP SRM STB STU TCP UDP UNO-CDR UNO-RPC STD.ETS1 ETS 300 802-ENGL 1997 3
34、Li00855 02Li1719 b3T Page 9 ETS 300 802: November 1997 Request For Com ment s Remote Procedure Call Real Time Protocol Service Information Systems for Interactive Services Satellite Master Antenna TeleVision Sub Network Attachment Point Simple Network Management Protocol Session and Resource Manager
35、 Set Top Box Set Top Unit Transmission Control Protocol User Datagram Protocol Universal Networked Object - Common Data Representation Universal Networked Object - Remote Procedure Call 4 Protocol stack and system models 4.1 Protocol stack model Within the DVB commercial requirements for asymmetric
36、interactive services supporting broadcast to the home with narrowband return channel (see annex A: Bibliography) a simple communications model has been used to identify the necessity and importance of each commercial requirement consisting of the following layers: Physical layer: where all the physi
37、cal (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 environments (ag. home shopping application, script interprete
38、r, etc.). ETS 300 800 3, ETS 300 801 4 and ETS 300 803 5 address the lower two layers (the physical and transport) leaving the application layer open to competitive market forces. The DVB adopted a simplified model of the OS1 layers to facilitate the production of specifications for these nodes. Fig
39、ure 1 points out the lower three layers of the simplified model and identifies some of the key parameters. Following the User requirements for interactive services, this ETS does not consider higher layers. This approach is in broad agreement to that proposed by other bodies such as DAVIC (see annex
40、 A: Bibliography). Page 10 ETC 300 802: November 1997 Layer Structure for Generic System Reference Model Higher medium layers Network Independent Protocols Access mechanism Packet Stnicture Modulation Channel Coding Freq . Range Fil tering Equalisation Power Network Dependent Protocols Figure 1 : La
41、yer Structure for Generic System Reference Model This ETS addresses the network independent protocols only, up to layer 4 on the OS1 stack in most cases. The network dependent protocols within the transport layer and the physical layers for different network options are specified separately, .e. for
42、 PSTNASDN (ETC 300 801 4), CATV (ETS 300 800 3), and SMATV/MAlV (ETS 300 803 5) networks. 4.2 System model Figure 2 shows the system model which is to be used within DVB for interactive services. STD-ETSI ETS 300 802-ENGL 1977 W 3q00855 0241721 298 Page 11 ETS 300 802: November 1997 Broadcast Channe
43、l (DVB Transmission Systems) interaction Cliannel Tntemcti on tt network independent II network independent network dependent li Figure 2: A Generic System Reference Model for Interactive Systems In the system model, two channels are established between the User and the Service Provider: the Broadca
44、st channel and the Interaction channel. Broadcast channel: A unidirectional broadband Broadcast channel including video, audio and data. The Broadcast channel is established from the Service Provider to the Users. It may include the Forward Interaction path. Interaction channel: A Bi-directional Int
45、eraction channel is established between the User and the Service Provider for interaction purposes. It is formed by: Return Interaction path from the User to the Service Provider is a narrowband channel, commonly known as Return channel, which is used to make requests to the Service Provider or to a
46、nswer quest ions. Forward Interaction path from the Service Provider to the User is used to provide some sort of information by the Service Provider to the User and any other required communication for the interactive service provision. It may be embedded into the Broadcast channel. It is possible t
47、hat this channel is not required in some simple implementations which make use of the Broadcast channel for the carriage of data to the User. 4.3 Logical model Figure 3 shows the mapping of logical channels onto the system model. The Broadcast channel carries Content from the Broadcast Service Provi
48、der and, in some instances, from the Interactive Service Provider to the User. The Broadcast channel may also carry embedded ACDACD and/or DDC from the Interactive Service Provider to the User, possibly for controlling an application for which Broadcast Programme Associated Data is being supplied by
49、 the Interactive Service Provider. The Interaction channel carries Content from the Interactive Service Provider to the User, and may also carry User Contribution Content back to the Interactive Service Provider. The Interaction channel also carries ACD/ACD to and from the User, and may also carry DDC to the User. The Interactive Service Provider may also need to send Content, either to the Broadcast Service Provider, or to the Broadcast Network Adapter. The latter will require the Interactive Service Provider to send ACD/ACD and/or DDC to the B
