1、 ETSI TS 102 668 V1.1.2 (2014-11) Digital Radio Mondiale (DRM); DRM-TMC (Traffic Message Channel) TECHNICAL SPECIFICATION ETSI ETSI TS 102 668 V1.1.2 (2014-11)2Reference RTS/JTC-DRM-29 Keywords DRM, traffic ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 F
2、ax: +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 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org The present document may be made available in electronic versions and/or in
3、print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of th
4、e Portable Document Format (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:/
5、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 or utilized in any form or by any means, electronic or mechanic
6、al, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications St
7、andards Institute 2014. European Broadcasting Union 2014. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organization
8、al Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 102 668 V1.1.2 (2014-11)3Contents Intellectual Property Rights 4g3Foreword . 4g3Modal verbs terminology 4g3Introduction 4g31 Scope 5g32 References 5g32.1 Normative references . 5g32.2 Informat
9、ive references 5g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 6g34 General . 7g34.1 TMC description 7g35 TMC data transport 7g36 Mapping of TMC messages . 9g37 Signalling and transport in DRM . 10g37.1 Signalling in the FAC . 10g37.2 Signalling in the SDC . 10g37.2.1
10、Service following 10g37.3 DRM data unit considerations 10g37.4 DRM packet mode considerations 11g38 DRM-TMC encoder requirements . 11g38.1 Date and time . 11g38.2 Country . 11g38.3 TMC Application ID (AID) 11g39 Other operational requirements 11g3Annex A (informative): Bibliography . 13g3History 14g
11、3ETSI ETSI TS 102 668 V1.1.2 (2014-11)4Intellectual 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
12、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:/ipr.etsi.org). Pursuant to the ETSI IPR Policy, no
13、 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 Technical
14、Specification (TS) has been produced 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 19
15、90 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. Th
16、e 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 headquar
17、ters is in Geneva. European Broadcasting Union CH-1218 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “may not“, “need“, “need not“, “will“, “will not“, “can“ and “ca
18、nnot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. Introduction The need for traffic and traveller information is rising in
19、our society. The Traffic Message Channel (TMC) is a specific application which delivers road driver information in an efficient way. TMC messages are intended for dedicated decoders, which perform a selection of the relevant messages and transform them to human-intelligible output, e.g. by display o
20、r a speech synthesiser. TMC messages can be filtered so that only those relevant to the current journey are displayed, while a TMC-enabled navigation system can offer dynamic route guidance - alerting the driver of a problem on the planned route and calculating an alternative route to avoid the inci
21、dent. TMC is already available in Digital Audio Broadcasting (DAB) 2 and in FM-RDS 4. To increase the availability of TMC, the DRM system 1 provides a suitable broadcast system. The huge coverage areas of DRM enable the distribution of nationwide and trans-national traffic messages. Therefore the pr
22、esent document allows the use of several TMC services originating from different sources to cover huge traffic areas combined within one DRM data application service. ETSI ETSI TS 102 668 V1.1.2 (2014-11)51 Scope The present document gives information how to transport the Traffic Message Channel (TM
23、C) in the Digital Radio Mondiale (DRM) system and provides the references to the associated specifications. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies
24、. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this cl
25、ause were valid at the time of publication, ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. 1 ETSI ES 201 980: “Digital Radio Mondiale (DRM); System specification“. 2 ETSI EN 300 40
26、1: “Radio Broadcasting Systems; Digital Audio Broadcasting (DAB) to mobile, portable and fixed receivers“. 3 ETSI TS 101 968: “Digital Radio Mondiale (DRM); Data applications directory“. 4 IEC 62106: “Specification of the radio data system (RDS) for VHF/FM sound broadcasting in the frequency range f
27、rom 87,5 to 108,0 MHz“. 5 ISO 14819-1: “Intelligent transport systems-Traffic and travel information messages via traffic message coding - Part 1: Coding protocol for Radio Data System - Traffic Message Channel (RDS-TMC) using ALERT-C“. 6 ISO 14819-6: “Traffic and Traveller Information (TTI) - TTI M
28、essages via traffic message coding - Part 6: Encryption and conditional access for the Radio Data System - Traffic Message Channel ALERT C coding“. 7 ISO 14819-3: “Intelligent transport systems-Traffic and travel information messages via traffic message coding - Part 3: Location referencing for Radi
29、o Data System - Traffic Message Channel (RDS-TMC) using ALERT-C“. 2.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. Not applicable. ETSI ETSI TS 102 668 V1.1.2
30、 (2014-11)63 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: DRM-TMC system message: 16 bit field comprising a part of TMC system information DRM-TMC user message: 37 bit field comprising either a TMC user message, TM
31、C tuning information, an Encryption Administration Group (EAG) or future TMC applications conveyed in ODA groups requiring 37 bits mapping Fast Access Channel (FAC): channel of the multiplex data stream which contains the information that is necessary to find services and begin to decode the multipl
32、ex Main Service Channel (MSC): channel of the multiplex data stream which occupies the major part of the transmission frame and which carries all the digital audio services, together with possible supporting and additional data services reserved for future addition (rfa): bits with this designation
33、are set to zero NOTE: Receivers need not decode these bits. reserved for future use (rfu): bits with this designation are set to zero NOTE: Receivers need to check that these bits in order to determine the valid status of the other fields in the same scope. Service Description Channel (SDC): channel
34、 of the multiplex data stream which gives information to decode the services included in the multiplex NOTE: The SDC also provides additional information to enable a receiver to find alternative sources of the same data. TMC multi-group messages: sequences of between two and five TMC single group me
35、ssages that constitute a detailed TMC message TMC system information: information that enables a TMC product to decode and evaluate essential data, which describes the transmission, being received e.g. AID, LTN, SID, MGS TMC system message: message comprising either TMC system information or TMC tun
36、ing information TMC tuning information: information that a TMC product needs to change from one transmitter to another if the signal becomes weak TMC user message: message comprising parameters of the actual traffic message such as the Location code and the Event code 3.2 Abbreviations For the purpo
37、ses of the present document, the following abbreviations apply: AID Application Identification ALERT-C Advice and problem Location for European Road Traffic, Version C BER Bit Error RAte CC Country Code (TMC) CRC Cyclic Redundancy Check DRM Digital Radio Mondiale EAG Encryption Administration Group
38、ECC Extended Country Code FAC Fast Access Channel FM Frequency Modulationhdr Header ETSI ETSI TS 102 668 V1.1.2 (2014-11)7ID IDentifier LTN Location Table Number (TMC) LTO Local Time Offset MGS Message Geographical Scope (TMC) MSb Most significant bit MSC Main Service Channel ODA Open Data Applicati
39、on (RDS) PAD Program Associated Data RDS Radio Data System rfa reserved for future addition rfu reserved for future use SDC Service Description Channel SID Service IDentifier (TMC) TMC Traffic Message Channel TMCHI Traffic Message Channel Header Indicator UA User Application UTC Co-ordinated Univers
40、al Time 4 General DRM has been designed to provide transport mechanisms for data applications which are complimentary to the audio service(s) carried or which stand alone. 3 gives the data application identifiers needed for DRM. 4.1 TMC description Traffic messages are coded in Events, Locations and
41、 Extents. All over Europe the same protocols are used. A TMC decoder in the receiver should be able to perform a selection of the relevant messages. The output can be by display, speech synthesizer or forwarded to the navigation system for automatic traffic incidents avoidance. TMC is split into: TM
42、C user messages carrying traffic data, being made known to the driver or a navigation system. TMC system messages carrying meta data such as table numbers, being of use to the TMC decoder for management purpose. 5 TMC data transport DRM enables the distribution of nationwide and trans-national traff
43、ic messages. The collection of several TMC services originating from different sources can be combined within one DRM data application service. Each TMC service can be transmitted in its own application format and with its own parameters (e.g. local time offset). The different TMC services shall use
44、 different unique TMC Short IDs. DRM provides different mechanisms to transport data. For the transmission of the TMC data a DRM packet mode stream with DRM data units shall be used. This mode is advantageous for this application because it supports variable bit rates and provides error control and
45、synchronisation mechanisms. A further advantage of this mechanism is the flexibility. If other applications using packet mode are in use the capacity of the service can be shared dynamically. TMC multi-group messages, i.e. several corresponding DRM-TMC user messages shall be within one data unit. Up
46、 to 7 padding bits may be included at the end of the data unit to achieve byte alignment. The length of the data units shall be equal to or less than 128 bytes. The DRM-TMC system messages and DRM-TMC user messages are packed into DRM data units, whereby the content of the data unit is defined as fo
47、llows: TMCHI 1 bit rfu 1 bitETSI ETSI TS 102 668 V1.1.2 (2014-11)8 TMC Short ID 4 bits when TMCHI = 1: the DRM-TMC header shall be transmitted: - rfa 1 bit - TMC UA flag 1 bit When TMC UA flag is = 1 an additional field is sent: - TMC UA data 16 bits number of TMC Services 4 bits Country ID 4 bits E
48、CC (Extended Country Code) 8 bits TMC LTO 6 bits number of DRM-TMC system messages, m (m 0) 2 bits m DRM-TMC system messages m 16 bits and additional TMC user messages could be transmitted: - n DRM-TMC user messages n 37 bits - Paddingbits variable length - CRC 16 bits when TMCHI = 0: n DRM-TMC user
49、 messages (n 0) n 37 bits Paddingbits variable length CRC 16 bit The following definitions apply: TMCHI: this TMC header indicator bit shall indicate the presence of the TMC header which consists of the following first fields. rfu: this bit is reserved for future use of the remainder of the parameter field and shall be set to zero for the currently specified definition of this field. TMC Short ID: this field contains the short ID for the TMC service concerned. It is unique for a combination of Country
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