1、 ETSI TR 102 252 V1.1.1 (2003-10)Technical Report Digital Video Broadcasting (DVB);Guidelines for implementation and use of thecontrol channel for SMATV/MATVdistribution systemsEuropean Broadcasting Union Union Europenne de Radio-Tlvision EBUUER ETSI ETSI TR 102 252 V1.1.1 (2003-10) 2 Reference DTR/
2、JTC-DVB-152 Keywords broadcasting, control, digital, DVB, SMATV, video 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 but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7
3、803/88 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 ve
4、rsion 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 s
5、tatus. 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, send your comment to: editoretsi.org Copyright Notification No part may be reproduced except as authorized by written permi
6、ssion. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2003. European Broadcasting Union 2003. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHO
7、NTMand the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TR 102 252 V1.1.1 (2003-10) 3 Contents Intellectual Property Rights5 F
8、oreword.5 1 Scope 6 2 References 7 3 Abbreviations .7 4 Reference model.8 5 Configurations of SMATV/MATV distribution systems.9 5.1 Current SMATV/MATV implementation 9 5.2 SMATV/MATV implementation based on the control channel.10 5.3 Typical SMATV/MATV topologies 11 5.3.1 SMATV/MATV installations wi
9、th resistive taps11 5.3.2 SMATV/MATV installations with inductive directional taps 12 5.3.3 SMATV/MATV installations with d.c. coupled inductive taps12 5.3.4 “Multiswitches equipped“ SMATV installations13 5.3.5 Intermediate amplification13 5.4 Performance of typical SMATV/MATV installations in the C
10、ontrol Channel frequency range13 6 Control Channel protocol .15 6.1 Basic features .15 6.2 CRC decoding implementation 16 6.3 Extension of the message length 17 7 Control Channel bus.17 7.1 Implementation of the 22 kHz bus .17 7.1.1 Example for a 22 kHz bus interface circuit.19 7.2 Implementation of
11、 the RF control channel bus.20 7.2.1 ACK and answer to a command .20 7.2.2 Control channel frequencies in networks with intermediate amplification.20 8 Performance evaluation of the multiaccess system21 8.1 kHz Control Channel bus .21 8.2 RF Control Channel bus .23 8.2.1 System description23 8.2.2 T
12、raffic hypothesis .23 8.2.3 Theoretical analysis 23 8.2.4 Collision scenario for repeated transmissions.25 9 Receiver and Head-end implementation aspects25 9.1 Physical Layer based on a 22 kHz bus .26 9.2 Physical Layer based on a RF bus26 Annex A: Installation and operation routines28 A.1 Introduct
13、ion 28 A.1.1 Network diagram28 A.1.2 PIN_code allocation .29 A.1.3 Assumptions .29 A.1.4 Installation operation29 A.1.4.1 Automatic Installation.29 A.1.4.2 Pre-setting.29 A.1.4.3 Installation Routine.30 A.2 Operation32 A.2.1 Manual Installation.32 A.2.2 Pre-setting.32 A.2.3 Installation Routine .33
14、ETSI ETSI TR 102 252 V1.1.1 (2003-10) 4 A.2.4 Operation34 Annex B: DiSEqC Commands allowing compatibility with existing systems.35 B.1 SMATV_Installation35 B.2 Headend_Call_Out_of_Standby.35 B.3 Headend_Tuning_Parameters 35 B.4 Master_Switch_to_Standby36 B.5 SMATV_Installation_reply36 B.6 Headend_Ca
15、ll_Out_of_Standby_reply 37 B.7 General_Call_for_STB(s) 37 B.8 Service_Commands_for_the_Head-end.37 B.9 Head-end installation, tuning, etc. procedure.37 Annex C: Subset of commands that FLEXIMATV recommends for implementation of the control channel protocol.39 C.1 Framing bytes.39 C.2 Commands39 Anne
16、x D: Common bus implementation 40 D.1 Introduction 40 D.2 Physical layer .40 D.3 Message structure.41 D.4 Bus protocol .41 Annex E (informative): Bibliography .44 History 45 ETSI ETSI TR 102 252 V1.1.1 (2003-10) 5 Intellectual Property Rights IPRs essential or potentially essential to the present do
17、cument 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
18、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 exi
19、stence 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 Technical Report (TR) has been produced by Joint Technical Committee (JTC) Broadcast of the European Broadcasting Union
20、 (EBU), Comit Europen 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
21、 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 membe
22、rs 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
23、: +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 organization
24、s 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. ETSI ETSI TR 102 252 V1.1.1 (2003-10) 6 1 Scope The present document provides the first guidance to manufactu
25、rers, network operators and service providers on equipment design for the use of the Control Channel for SMATV/MATV systems, whose baseline specification is given in TS 101 964 1. The Control Channel for SMATV/MATV distribution systems is intended to provide remote control of the head-end device fro
26、m the users terminal through a set of commands in a closed in-building environment for the delivery of broadcast services. Furthermore, the Control Channel allows each single user of the building to autonomously decide on the possibility of receiving digital broadcasting services through the communi
27、ty installation, without the need of authorisation from the other users. So the user connected via the in-building cable network can access the broadcast services, satellite and terrestrial, as in the case of “individual reception“. The Control Channel protocol is based on DiSEqC 2 to maintain compa
28、tibility with existing products and has the further advantage of being sufficiently flexible to allow for future extensions, if and when needed. The structure of the Control Channel message ensures a robust transmission mechanism. SMATV/MATV distribution systems, as described in EN 300 473 3, repres
29、ent a solution widely adopted for in-building delivery of DVB signals (both satellite and terrestrial) through collective installations. The adoption of the Control Channel specification, which has been defined in accordance with the commercial requirements given in DVB-TM 2342 (see bibliography), o
30、ffers an alternative cost-effective solution to the current implementation of SMATV/MATV systems, especially for the case of small and medium size installations, allowing the delivery of DVB TSs/multiplexes without the constraints of the limited bandwidth available in the installation. The technical
31、 specification of the Control Channel system (see TS 101 964 1) describes the message structure and the set of commands and coding used for remote controlling the Head-end of the SMATV/MATV distribution system. The specification covers both the approaches adopted for the delivery of satellite signal
32、s as identified in EN 300 473 3, i.e. transmodulation from QPSK to QAM (System A) and direct distribution in QPSK after frequency conversion (System B), as well as the remote control of other head-end devices for broadcast services. The specification also takes into account the requirements from EN
33、301 790 4 in order to achieve the best commonality and ensure the minimum functionality required for operating via the SMATV systems the satellite interactive terminals. Although primarily focused on SMATV systems for delivery of satellite DVB services, the Control Channel shall also be applicable t
34、o MATV systems currently used for terrestrial broadcasting services via VHF/UHF and microwave. The Physical layers of the Control Channel system, described in clauses A.1 and A.2 of TS 101 964 1, allow for a general use of the Control Channel in the whole range of SMATV/MATV distribution systems, ha
35、ving different topologies and characteristics. The transmission protocol providing the communication link between the users terminal and the head-end device makes use of the same commands and coding for both physical layers. Furthermore, since the Control Channel capacity is shared among all the use
36、r terminals, a “multiaccess“ approach is adopted in order to guarantee adequate access time to the selected service. The solution presented in clause A.1 of TS 101 964 1, which is based on the use of a 22 kHz bus, is suitable for the case of small SMATV/MATV installations using d.c. coupled elements
37、. The solution presented in clause A.2 of TS 101 964 1, which is based on the use of an RF bus in a frequency range above 10 MHz, provides the capability to pass through community installations using inductive components. So, this second solution potentially allows for a transparent introduction of
38、the Control Channel in most existing SMATV/MATV systems. The present document gives details on the technical parameters and guidelines for system implementation, and provides an evaluation of the performance of the multiaccess schemes adopted for the 22 kHz bus and the RF Control Channel bus, as wel
39、l as a better knowledge of the features and possibilities offered by the Control Channel protocol . FLEXIMATV Project IST-2000-28695 has been devoted to develop technological solutions based on the DVB control channel specification, aiming at consolidating that European standard, introducing any nec
40、essary enhancements and producing clear guidelines on the best practices for implementing DVB control channel systems. These contributions have been included in the present document. Consequently, FLEXIMATV has been aimed at the consolidation of a mature standard supported and endorsed by the analys
41、is and studies, development of industrial solutions, confirmation of suitable performances through appropriate tests in laboratory and in real installations. ETSI ETSI TR 102 252 V1.1.1 (2003-10) 7 2 References For the purposes of this Technical Report (TR) the following references apply: 1 ETSI TS
42、101 964: “Digital Video Broadcasting (DVB); Control Channel for SMATV/MATV distribution systems; Baseline Specification“. 2 Eutelsat: “DiSEqC Bus Functional Specification version 4.2“, February 25, 1998 . 3 ETSI EN 300 473: “Digital Video Broadcasting (DVB); Satellite Master Antenna Television (SMAT
43、V) distribution systems“. 4 ETSI EN 301 790: “Digital Video Broadcasting (DVB); Interaction channel for satellite distribution systems“. 5 IEC 60728-1: “Cabled distribution system for sound and television signals - Part 1: Methods of measurement and system performance“. 6 ETSI EN 300 421: “Digital V
44、ideo Broadcasting (DVB); Framing structure, channel coding and modulation for 11/12 GHz satellite services“. 7 ETSI EN 300 429: “Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for cable systems“. 8 ETSI EN 300 744: “Digital Video Broadcasting (DVB); Framing struct
45、ure, channel coding and modulation for digital terrestrial television“. 3 Abbreviations For the purposes of the present document, the following abbreviations apply: ACK ACKnowledge CRC Cyclic Redundancy Check DC Direct Current DiSEqC Digital Satellite Equipment Control DVB-TS Digital Video Broadcast
46、ing-Transport Stream FDMA Frequency Division Multiple Access FEC Forward Error Correction FSK Frequency Shift Keying HE Head EndHeCD Head-end Control Device HED Head End Device HP High Priority IDU InDoor Unit IF Intermediate Frequency LNB Low Noise Block LP Low Priority MATV Master Antenna TV MID M
47、aster IDentifier MMI Man-Machine Interface ODU OutDoor Unit OFDM Orthogonal Frequency Division Multiplexing PIN Personal Identification Number PWK Pulse Width Keying QAM Quadrature Amplitude Modulation QPSK Quaternary Phase Shift Keying RF Radio Frequency SID Slave IDentifier SMATV Satellite Master
48、Antenna TV STB Set Top Box TDMA Time Division Multiple Access ETSI ETSI TR 102 252 V1.1.1 (2003-10) 8 UHF Ultra High Frequency VHF Very High Frequency 4 Reference model The reference model representing the Control Channel solution adopted by SMATV/MATV distribution systems, and specified in TS 101 9
49、64 1, is shown in figure 1. HeCD Set - Top - Box Module 1 (e.g. QPSK to QAM , IF to IF) SMATV/MATV Cable Network Head - end device Control Channel (Narrow - band carrier) Control Channel Interface Module 2 In - building Hea d - end unit Module N Broadcast Channel User - allocated RF Channel (e.g. 8 MHz) Local bus Figure 1: Simplified functional block diagram of the in-building SMATV/MATV System using a Control Channel The system approach is based on the allocation of two independent logical channels to each user terminal: Broadc
