ISO 21219-10:2023

Intelligent transport systems - Traffic and travel information (TTI) via transport protocol experts group, generation 2 (TPEG2) - Part 10: Conditional access information (TPEG2-CAI)

This document defines the TPEG conditional access information (CAI) application. It allows the protection of the content of a TPEG service from unauthorized access. It further supports the management of subscriber information (e.g. control words and entitlement control message, ECM) on client devices in order to setup, prolong or revoke a subscription on a given client device. The CAI application defines: - the logical channel for the transmission of the additional CAI, and - how the CAI is linked and synchronized to the scrambled content. This document is related to conditional access applied on the service component level. It can be integrated into different conditional access systems. NOTE The basic concept behind the CAI application is to transport CAI in separate TPEG service components of a dedicated application type and to define a service and network information (SNI) table that contains the link between scrambled content and related CAI.

Systèmes intelligents de transport — Informations sur le trafic et le tourisme via le groupe expert du protocole de transport, génération 2 (TPEG2) — Partie 10: Information d'accès conditionnel (TPEG2-CAI)

General Information

• Status: Published
• Publication Date: 18-May-2023
• ICS: 03.220.01 - Transport in general
• ICS: 35.240.60 - IT applications in transport
• Technical Committee: ISO/TC 204 - Intelligent transport systems
• Drafting Committee: ISO/TC 204/WG 10 - Traveller information systems
• Current Stage: 6060 - International Standard published
• Start Date: 19-May-2023
• Due Date: 04-Sep-2022
• Completion Date: 19-May-2023

Relations

• Revises: ISO/TS 21219-10:2016 - Intelligent transport systems - Traffic and travel information (TTI) via transport protocol experts group, generation 2 (TPEG2) - Part 10: Conditional access information (TPEG2-CAI)
• Effective Date: 23-Apr-2020

Overview

ISO 21219-10:2023 - TPEG2-CAI defines the Conditional Access Information (CAI) application within the TPEG Generation 2 (TPEG2) suite for intelligent transport systems (ITS). The standard specifies how to protect TPEG traffic and travel information (TTI) content from unauthorized access and how to manage subscriber-related data (for example, control words and entitlement control messages - ECM) on client devices. It establishes the logical transport channel for CAI and describes how CAI is linked and synchronized to scrambled service components.

Keywords: ISO 21219-10:2023, TPEG2-CAI, conditional access, TPEG, intelligent transport systems, traffic and travel information.

Key topics and technical requirements

• Scope of protection: Defines CAI for service-component-level conditional access to protect TPEG service components without mandating a single CA system implementation.
• Subscriber management: Supports transmission and life-cycle operations for subscriber data needed to set up, prolong or revoke subscriptions on client devices (e.g., ECMs and control words).
• Logical channel and synchronization: Specifies the dedicated logical channel (separate TPEG service components) that carries CA metadata and how it is synchronized to the corresponding scrambled content.
• Service and Network Information (SNI) linkage: Uses SNI tables to link scrambled content to related CAI service components so decoders can locate and process entitlement data.
• EncID and service-component granularity: Aligns with the TPEG2 encryption identifier (EncID) mechanism to indicate which components are encrypted and which CAI applies.
• Physical representations: Includes normative annexes for binary and tpegML representations (conversion to transmission formats).
• Frame and CRC requirements: CAI uses the TPEG “Service Component Frame with dataCRC” as defined elsewhere in TPEG2.

Practical applications and users

Who benefits:

• Broadcast and multicast service providers implementing paid or restricted TTI channels.
• Conditional access system vendors integrating CAI into existing CA platforms.
• Receiver and client device manufacturers that must implement decryption and subscription management for TPEG2 services.
• Transport authorities and mobility service operators distributing premium or regional TTI content.
• Software developers building TPEG2 encoders/decoders and content management tools.

Practical uses:

• Protecting premium traffic feeds, route guidance, or location-based services.
• Managing entitlements and subscription lifecycles on in-vehicle units and mobile receivers.
• Bundling multiple encrypted service components under shared CA metadata for package-based offerings.

Related standards

• ISO 21219-1 (TPEG2 introduction, numbering and versions)
• ISO 21219-4 (service component framing)
• ISO 21219-5 (conditional access methodology)
• ISO 21219-9 (Service and Network Information - SNI)
• Other parts of the ISO 21219 series covering TPEG2 applications and location referencing

ISO 21219-10:2023 is essential for anyone implementing secure, subscription-capable TPEG2 traffic and travel information services.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 21219-10
First edition
2023-05
Intelligent transport systems —
Traffic and travel information (TTI)
via transport protocol experts group,
generation 2 (TPEG2) —
Part 10:
Conditional access information
(TPEG2-CAI)
Systèmes intelligents de transport — Informations sur le trafic et le
tourisme via le groupe expert du protocole de transport, génération 2
(TPEG2) —
Partie 10: Information d'accès conditionnel (TPEG2-CAI)
Reference number
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Application specific constraints . .2
5.1 Application identification . 2
5.2 Version number signalling . 2
5.3 TPEG service component frame . 2
6 Conditional access methodology .2
7 CAI structure. 3
8 CAI message components . 4
8.1 CAIMessage. 4
Annex A (normative) TPEG CAI, TPEG-binary representation . 5
Annex B (normative) TPEG CAI, tpegML representation . 6
Bibliography . 7
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
This first edition cancels and replaces the first edition (ISO/TS 21219-10:2016), which has been
technically revised.
The main changes are as follows:
— the document has been changed from a Technical Specification to an International Standard.
A list of all parts in the ISO 21219 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
0.1  History
TPEG technology was originally proposed by the European Broadcasting Union (EBU) Broadcast
Management Committee, who established the B/TPEG project group in the autumn of 1997 with a brief
to develop, as soon as possible, a new protocol for broadcasting traffic and travel-related information in
the multimedia environment. TPEG technology, its applications and service features were designed to
enable travel-related messages to be coded, decoded, filtered and understood by humans (visually and/
or audibly in the user’s language) and by agent systems. Originally, a byte-oriented data stream format,
which can be carried on almost any digital bearer with an appropriate adaptation layer, was developed.
Hierarchically structured TPEG messages from service providers to end-users were designed to
transfer information from the service provider database to an end-user’s equipment.
One year later, in December 1998, the B/TPEG group produced its first EBU specifications. Two
documents were released. Part 2 (TPEG-SSF, which became ISO/TS 18234-2) described the syntax,
semantics and framing structure which was used for all TPEG applications. Meanwhile, Part 4 (TPEG-
RTM, which became ISO/TS 18234-4) described the first application for road traffic messages.
Subsequently, in March 1999, CEN/TC 278, in conjunction with ISO/TC 204, established a group
comprising members of the former EBU B/TPEG and this working group continued development
work. Further parts were developed to make the initial set of four parts, enabling the implementation
of a consistent service. Part 3 (TPEG-SNI, later ISO/TS 18234-3) described the service and network
information application used by all service implementations to ensure appropriate referencing from
one service source to another.
Part 1 (TPEG-INV, later ISO/TS 18234-1) completed the series by describing the other parts and their
relationship; it also contained the application IDs used within the other parts. Additionally, Part 5, the
public transport information application (TPEG-PTI, later ISO/TS 18234-5), was developed. The so-
called TPEG-LOC location referencing method, which enabled both map-based TPEG-decoders and non-
map-based ones to deliver either map-based location referencing or human-readable text information,
was issued as ISO/TS 18234-6 to be used in association with the other applications of parts of the
ISO 18234 series to provide location referencing.
The ISO 18234 series has become known as TPEG Generation 1.
0.2  TPEG Generation 2
When the Traveller Information Services Association (TISA), derived from former forums, was
inaugurated in December 2007, TPEG development was taken over by TISA and continued in the TPEG
applications working group.
It was about this time that the (then) new Unified Modelling Language (UML) was seen as having major
advantages for the development of new TPEG applications in communities who would not necessarily
have the binary physical format skills required to extend the original TPEG TS work. It was also realized
that the XML format for TPEG described within the ISO 24530 series (now superseded) had a greater
significance than previously foreseen, especially in the content-generation segment, and that keeping
two physical formats in synchronism, in different standards series, would be rather difficult.
As a result, TISA set about the development of a new TPEG structure that would be UML-based. This has
subsequently become known as TPEG Generation 2 (TPEG2).
TPEG2 is embodied in the ISO 21219 series and it comprises many parts that cover an introduction,
rules, toolkit and application components. TPEG2 is built around UML modelling and has a core of
rules that contain the modelling strategy covered in ISO 21219-2, ISO 21219-3 and ISO 21219-4 and the
conversion to two current physical formats: binary (see Annex A) and XML (see Annex B); others can
be added in the future. TISA uses an automated tool to convert from the agreed UML model XMI file
directly into an MS Word document file, to minimize drafting errors; this file forms the annex for each
physical format.
v
TPEG2 has a three-container conceptual structure: message management (ISO 21219-6), application
(several parts) and location referencing (ISO/TS 21219-7). This structure has flexible capability and
can accommodate many differing use cases that have been proposed within the TTI sector and wider
for hierarchical message content.
TPEG2 also has many location referencing options as required by the service provider community, any
of which may be delivered by vectoring data included in the location referencing container.
The following classification provides a helpful grouping of the different TPEG2 parts according to their
intended purpose. Note that the list below is potentially incomplete, as there is the possibility that new
TPEG2 parts will be introduced after the publication of this document.
— Toolkit parts: TPEG2-INV (ISO 21219-1), TPEG2-UML (ISO 21219-2), TPEG2-UBCR (ISO 21219-3),
TPEG2-UXCR (ISO 21219-4), TPEG2-SFW (ISO 21219-5), TPEG2-MMC (ISO 21219-6), TPEG2-LRC
(ISO/TS 21219-7).
— Special applications: TPEG2-SNI (ISO 21219-9), TPEG2-CAI (ISO 21219-10 - this document), TPEG2-
LTE (ISO/TS 21219-24).
— Location referenc
...