1、ETSI EN 300 751 1.2.1 (2003-01) European Sfandard (Telecommunicafions series) Radio broadcasting systems; DAta Radio Channel (DARC); System for wireless infotainment forwarding and teledistribution 2 ETSI EN 300 751 VI .2.1 (2003-01) The pre ent d Reference REN/JTC-DARC-RI Keywords broadcasting, FM,
2、 multimedia, radio ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the p
3、resent document can be downloaded from: http:lwmv.etsi .arq cument may be made available in more than one electronic version or in print. In any ca e of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute
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6、duction in all media. O European Telecommunications Standards Institute 2003. O European Broadcasting Union 2003. All rights reserved. DECTTM, PLUGTESTSTMand UMTSTMare Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being register
7、ed 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 3 ETSI EN 300 751 VI . 2.1 (2003-01) Contents Intellectual Property Rights 6 Foreword . 6 Introduction 6 1 2 3 3.1 3.2 4 5 6 7 Scope 8 Ref
8、erences 8 Definitions and abbreviations . 9 Definitions 9 Abbreviations 9 Multiplex requirements 10 Functions of the multiplexing unit . 10 Reference model . 11 Layers organization OS1 reference model 12 7.1 7.1.1 7.1.2 7.1.3 7.1.4 7.1.5 7.1.6 7.1.7 7.2 7.3 7.3.1 7.3.1.1 7.3.1.1.1 7.3.1.1.2 7.3.1.1.
9、3 7.3.1.1.4 7.3.1.1.5 7.3.1.2 7.3.2 7.3.2.1 7.3.2.1.1 7.3.2.1.2 7.3.2.2 7.3.2.2.1 7.3.2.3 7.3.2.4 7.3.2.5 7.3.2.6 7.3.3 7.3.3.1 7.3.3.1.1 7.3.3. 8 8.1 8.2 8.3 8.3.1 8.3.2 8.3.2. . 2 Functional layers 12 Physical layer (Layer i) 12 Data link layer (Layer 2) . 12 Network layer (Layer 3) . 12 Transport
10、 layer (Layer 4) 13 Session layer (Layer 5) . 13 Presentation layer (Layer 6) 13 Application layer (Layer 7) . 13 Services and protocols 13 Detailed description of Layers 1 to 5 14 Layer 1 14 Service provided by Layer 1 . 14 Service on the transmitter side . 14 Modulation characteristics . 14 Bit ra
11、te . 15 Subcarrier amplitude . 15 Protection ratios . 16 Service on the receiver side . 16 Layer 2 16 Service provided by Layer 2 . 16 Service on the transmitter side . 17 Service on the receiver side . 17 Layer 2 protocol 17 Frame structure 17 Information Block . 20 Parity Block . 21 Block Identifi
12、cation Code (BIC) . 21 21 Layer 3 (Network layer) 22 Service provided by 22 22 22 Service on the receiver side Multiplex organization (Layer 3 and 4) 23 Principles 23 Definition of logical channel 23 Service Channel “SeCh“ (SI/LCh = 8 Hex) 23 Definition 23 Service Channel - Layer 3 24 L3-Header Sech
13、 format 24 ETSI 4 ETSI EN 300 751 VI .2.1 (2003-01) 8.3.3 8.3.3.1 8.3.3.2 8.3.3.3 8.3.3.4 8.3.3.4.1 8.3.3.4.2 8.3.3.5 8.3.3.6 8.3.3.6.1 8.3.3.6.2 8.3.3.6.3 8.3.3.6.4 8.3.3.6.5 8.4 8.4.1 8.4.2 8.5 8.5.1 8.5.2 8.6 8.6.1 8.6.2 8.6.2.1 8.6.2.2 8.6.3 Service message format . . 25 Channel Organization Tab
14、le (COT) . . . . 25 Alternative Frequency Table (AFT) . . 26 Service Alternative Frequency Table (SAFT) . . .27 Time, Date, Position and Network name Table (TDPNT) . .29 MJD, Modified-Julian-Date . 29 Time reference . 29 Service Name Table (SNT) . 3 1 Time and Date Table (TDT) . . 33 Time Format 33
15、MJD, Modified-Julian-Date . 34 Network Name 34 35 36 37 L4-Header SMCh format 37 L3-Header SMCh format 38 38 L4-Header LMCh format 39 L3-Header LMCh format 40 40 L3-Header BMCh format 40 Block Application Chann 41 L4-Header BACh format . . . 41 L3-Header BACh format. . . 41 Synchronous Frame Message
16、 (SI/LCh = B Hex, SCh = 4 Hex) . 42 Short Message Channel “SMCh“ (SI/LCh = 9 Hex) Long Message Channel “LMCh“ (SI/LCh = A Hex) Block Message Channel “BMCh“ (SI/LCh = B Hex) 9 Layer 5 structure . 43 9.1 File, Packet and Information Protocol . . 43 9.1.1 Layer 5 processing . . . . . . . . . . . . . .
17、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43 9.1.2 Types . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44 9.1.3 L5 Packet 44 9.1.3.1 L5 Packet Header 45 9
19、.1.3.2 Extended L5 Packet Header 45 9.1.4 9.1.4.1 9.1.4.2 9.1.4.3 9.1.4.3.1 9.1.5 9.1.5.1 9.2 9.2.1 9.2.1.1 9.2.1.2 9.2.1.3 9.2.1.3.1 9.2.2 45 46 Extended File Header 46 File TLV Structure 47 47 47 48 48 49 49 Description of the DGCA field . 50 Fields description of the session header 50 User Access
20、 field . 5 1 Coding ofthe data group type 12 51 L5-Data group header LMCh format Fields description of the data group minimum header 10 Conditional Access (CA) 52 10.1 Scrambling data 52 10.1.1 Introduction. . .52 Generating scrambling and descrambling sequences. .53 10.1.2 10.1.2.1 Initialization W
21、ord (IW) . . . 53 10.1.2.2 Phasin 53 10.1.3 S cramblin 53 10.1.3.1 Condit 53 10.1.3.3 55 . . 10.1.3.2 Scrambling/Descrambling of the service in Data Groups 55 10.1.3.4 Scrambling/Descrambling of the service sent in SMCh 55 10.1.3.5 DAB compatibility 55 Scrambling/Descrambling of the service in the L
22、ong Message Channel 10.2 Signalling and synchronizing data 56 ETSI 5 ETSI EN 300 751 VI .2.1 (2003-01) 10.2.1 10.2.2 10.2.3 10.2.4 10.2.4.1 10.2.4.2 10.2.5 10.2.5.1 10.2.5.2 10.3 10.3.1 10.3.1.1 10.3.1.2 10.3.1.3 10.3.2 10.3.2.1 10.3.2.2 10.3.2.3 Conditional Access Identifier (CAId) . Service Condit
23、ional Access (SCA) . Data Group Conditional Access (DGCA) . Long Message Channel Conditional Access (LMCCA and LMCCA-Ext) Short Message Channel Conditional Access (SMCCA and SMCCA-Ext) . 56 . 57 . 58 . 59 . 59 . 60 . 61 . 61 .62 .62 . 62 . . SMCCA . SMCCA . ECM and EMM transmission . General descrip
24、tion . ECM coding . .63 EMM coding . . .63 Command Identifier (CI) coding . 64 Transport . 65 LMCh 65 SMCh 66 Together with service data 67 1 1 Error correction strategy .67 1 1.1 Layer 2 error detection and correction .67 1 1.2 Error detection strategy at other layers . 67 11.2.1 L3 short message h
25、eader CRC .67 11.2.2 L3 long message header CRC . 68 1 1.2.3 L4 short message header CRC 68 1 1.2.4 L4 long message header CRC . 68 11.2.5 L5 (data group) CRC . 68 12 Bit-order of transmission 69 13 Service addressing mechanism . 70 13.1 Global services . 70 13.2 Country wide services 70 13.3 Networ
26、k specific services . 71 13.4 Local services of single transmitters 71 13.5 Address allocation for global services 71 14 Quality of service .7 1 . 71 14.1 Useful bit-rate 14.2 Expected capabilities of a Co ss system . 71 14.2.1 From the users point of view . 71 Access time of a newly connected user
27、. . 71 .72 14.2.1.2 Zapping time . From the service operators point of view . . 72 Bit rate needed to broadcast Conditional Access messages .72 14.2.2.1.1 Bit rate for the ECMs .72 14.2.2.1.2 Bit rate for the EMMs .72 Maximum time for changing the access mode .73 . 73 cycle . 73 .73 14.2.2.5 Repetit
28、ion frequency . 14.2.2.6 Hierarchical coding and scrambling . 73 History . .75 14.2.1.1 14.2.2 14.2.2.1 14.2.2.2 14.2.2.3 . 14.2.2.4 15 Classes of services 73 ETSI 6 ETSI EN 300 751 VI .2.1 (2003-01) Intellectual Property Rights IPRs essential or potentially essential to the present document may hav
29、e 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 O00 3 14: “Intellectual Property Rights (7PRs); Essential, orpotentially Essential, IPRs notlJied to ETSI in respect ofETSI standar
30、ds“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (5). 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 prod
31、uced by Joint Technical Committee (JTC) Broadcast of the European Broadcasting Union (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 o
32、f 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 associat
33、ion 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 Broa
34、dcasting Union CH-I218 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 National transposition dates Date of adoption of this EN: Date of latest announcement of this EN (doa): Date of latest publication of new National Standard or endorsement of this EN (dop/e): Date o
35、f withdrawal of any conflicting National Standard (dow): 24 January 2003 30 April 2003 3 1 October 2003 3 1 October 2003 I n t rod uct ion A multiplex is necessary to optimize the use of the radio channel by sharing it between several applications. For example, a dGPS application has some precise co
36、nstraints such as real time (one message per second), size (2 kbits per message). This application requires a continuous channel of perhaps 3 kbit/s. Assuming a DARC channel has a minimum useful bit rate of 6 kbit/s, it would be interesting to use the remaining 3 kbit/s for another application, news
37、papers broadcasting for example. On the opposite, in a newspaper application, it is necessary to broadcast the news twice a day for example in a maximum time (1 hour). This is a low rate service with a big amount of data and without real time. It would be interesting to stop for some time this servi
38、ce if hot news have to be sent (higher service priority). Sometimes, the network operator can offer the same application (class of applicationhervice) to different service providers, for example, different newspapers. It would be interesting to multiplex this newspapers on the same radio channel in
39、a transparent manner for the service provider point of view. ETSI 7 ETSI EN 300 751 VI .2.1 (2003-01) The multiplex can be made: in the Transmitter Station Equipment (TSE), for splitting the radio channel into logical channels using a given mapping at a given time. The characteristic of the logical
40、channels is a constant bit rate enabling real time applications andor applications requiring constant bit rate all the time; in the TSE, for repeating regularly or inserting some information into the multiplex. In this case, a local priority management is required; on the network server, based on a
41、priority mechanism. This enables for example the mixing of several applications with different priorities, but not real time and on demand (news and hot news, pictures preloading and weather information); on the network server, for multiplexing different processes of an application (for example, dif
42、ferent newspapers for the application newspapers broadcasting). This is useful if it should offer a quicker “average“ service (for example, the reading of a newspaper page by page before the complete loading). As described above, there are different multiplexing levels/functions for different reason
43、s. Each function is necessary and it shall be possible to make them running together. ETSI 8 ETSI EN 300 751 VI .2.1 (2003-01) 1 Scope The present document establishes a broadcasting standard of a System for Wireless Infotainment Forwarding and Teledistribution (DARC) designed for delivery of data s
44、ervices for mobile, portable and fixed receivers in the FM band. The present document defines the nature and content of the transmitted DARC signal. It describes also the organization of the multiplex for the DARC standard. 2 Re fe re nces The following documents contain provisions which, through re
45、ference in this text, constitute provisions of the present document. References are either specific (identified by date of publication andor 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
46、 applies. Referenced documents which are not found to be publicly available in the expected location might be found at p. il EN 62106: “Specification of the radio data system (RDS) for VHF/FM sound broadcasting in the frequency range from 87,5 to 108,O MHz“. ETSI ETS 300 075: “Terminal Equipment (TE
47、); Processable data; File transfer“ ETSI ETS 300 174: “Network Aspects (NA); Digital coding of component television signals for contribution quality applications in the range 34 - 45 Mbit/s“. ETSI EN 300 401: “Radio Broadcasting Systems; Digital Audio Broadcasting (DAB) to mobile, portable and fixed
48、 receivers“. IS0 7498: “Information technology - Open systems Interconnection - Basic Reference Model“. ITU-T Recommendation X.200: “Information technology - Open Systems Interconnection - Basic Reference Model: The basic model“. 21 31 41 51 61 71 ITU-R Recommendation BS. 1194: “System for multiplexing frequency modulation (FM) sound broadcasts with a sub-carrier data channel having a relatively large transmission capacity for stationary and mobile reception“. ITU-R Recommendation BS.4
