ETSI TS 102 668 V1.1.1 (2009-04)

ETSI TS 102 668 V1.1.1 (2009-04)
Technical Specification
Digital Radio Mondiale (DRM);
DRM-TMC (Traffic Message Channel)
European Broadcasting Union Union Européenne de Radio-Télévision
EBU·UER
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2 ETSI TS 102 668 V1.1.1 (2009-04)
Reference
DTS/JTC-DRM-21
Keywords
DRM, traffic
ETSI
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Intellectual Property Rights ................................................................................................................................ 4

Foreword ............................................................................................................................................................. 4

Introduction ........................................................................................................................................................ 4

1 Scope ........................................................................................................................................................ 5

2 References ................................................................................................................................................ 5

2.1 Normative references ......................................................................................................................................... 5

2.2 Informative references ........................................................................................................................................ 6

3 Definitions and abbreviations ................................................................................................................... 6

3.1 Definitions .......................................................................................................................................................... 6

3.2 Abbreviations ..................................................................................................................................................... 7

4 General ..................................................................................................................................................... 7

4.1 TMC description ................................................................................................................................................ 7

5 TMC data transport .................................................................................................................................. 7

6 Mapping of TMC messages ..................................................................................................................... 9

7 Signalling and transport in DRM ........................................................................................................... 10

7.1 Signalling in the FAC ....................................................................................................................................... 10

7.2 Signalling in the SDC ....................................................................................................................................... 10

7.2.1 Service following ........................................................................................................................................ 10

7.3 DRM data unit considerations .......................................................................................................................... 10

7.4 DRM packet mode considerations .................................................................................................................... 11

8 DRM-TMC encoder requirements ......................................................................................................... 11

8.1 Date and time ................................................................................................................................................... 11

8.2 Country ............................................................................................................................................................. 11

8.3 TMC Application ID (AID).............................................................................................................................. 11

9 Other operational requirements .............................................................................................................. 11

Annex A (informative): Bibliography ................................................................................................... 13

History .............................................................................................................................................................. 14

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pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

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This Technical Specification (TS) has been produced by Joint Technical Committee (JTC) Broadcast of the European

Broadcasting Union (EBU), Comité Européen de Normalisation ELECtrotechnique (CENELEC) and the European

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

The need for traffic and traveller information is rising in 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 or 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

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 present document allows the use of several

TMC services originating from different sources to cover huge traffic areas combined within one DRM data application

The present document gives information how to transport the Traffic Message Channel (TMC) in the Digital Radio

Mondiale (DRM) system and provides the references to the associated specifications.

References are either specific (identified by date of publication and/or edition number or version number) or

• Non-specific reference may be made only to a complete document or a part thereof and only in the following

- if it is accepted that it will be possible to use all future changes of the referenced document for the

Referenced documents which are not found to be publicly available in the expected location might be found at

NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee

The following referenced documents are indispensable for the application of the present document. For dated

references, only the edition cited applies. For non-specific references, the latest edition of the referenced document

[2] ETSI EN 300 401: "Radio Broadcasting Systems; Digital Audio Broadcasting (DAB) to mobile,

[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

[5] ISO 14819-1: "Traffic and Traveller Information (TTI) - TTI messages via traffic message coding

- Part 1: Coding protocol for Radio Data System - Traffic Message Channel (RDS-TMC) - RDS -

[6] ISO 14819-6: "Traffic and Traveller Information (TTI) - TTI Messages via traffic message coding

- Part 6: Encryption and conditional access for the Radio Data System - Traffic Message Channel

[7] ISO 14819-3: "Traffic and Travel Information (TTI) - TTI Messages via traffic message coding -

The following referenced documents are not essential to the use of the present document but they assist the user with

regard to a particular subject area. For non-specific references, the latest version of the referenced document (including

For the purposes of the present document, the following terms and definitions apply:

DRM-TMC user message: 37 bit field comprising either a TMC user message, TMC tuning information, an

Encryption Administration Group (EAG) or future TMC applications conveyed in ODA groups requiring 37 bits

Fast Access Channel (FAC): channel of the multiplex data stream which contains the information that is necessary to

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

NOTE: Receivers need to check that these bits in order to determine the valid status of the other fields in the same

Service Description Channel (SDC): channel of the multiplex data stream which gives information to decode the

NOTE 3: The SDC also provides additional information to enable a receiver to find alternative sources of the same

TMC multi-group messages: sequences of between two and five TMC single group messages that constitute a detaile