ISO 15784-3:2008

Intelligent transport systems (ITS) — Data exchange involving roadside modules communication — Part 3: Application profile-data exchange (AP-DATEX)

ISO 15784-3:2008 defines an application profile referring ISO 14827 and other base standards. The application profile it specifies is used to exchange data and messages between a traffic management centre and roadside modules for traffic management, and between roadside modules used for traffic management. The scope of ISO 15784-3:2008 does not include the communication between roadside modules and in-vehicle units, in-vehicle communication, in-cabinet communication or motion video transmission from a camera or recorded media.

Systèmes intelligents de transport (SIT) — Échange de données impliquant la communication par modules en bordure de route — Partie 3: Profil d'application-échange de données (AP-DATEX)

General Information

• Status: Published
• Publication Date: 05-Oct-2008
• ICS: 03.220.20 - Road transport
• ICS: 35.240.60 - IT applications in transport
• Technical Committee: ISO/TC 204 - Intelligent transport systems
• Drafting Committee: ISO/TC 204/WG 9 - Integrated transport information, management and control
• Current Stage: 9093 - International Standard confirmed
• Due Date: 06-Nov-2024
• Completion Date: 06-Nov-2024

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 15784-3
First edition
2008-10-15
Intelligent transport systems (ITS) — Data
exchange involving roadside modules
communication —
Part 3:
Application profile-data exchange
(AP-DATEX)
Systèmes intelligents de transport (SIT) — Échange de données
impliquant la communication par modules en bordure de route —
Partie 3: Profil d'application-échange de données (AP-DATEX)

Reference number
©
ISO 2008
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ii © ISO 2008 – All rights reserved

Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Abbreviated terms . 4
5 General. 5
5.1 Open systems interconnection (OSI) reference model. 5
5.2 Scenario. 5
6 Requirements . 7
6.1 General Requirements. 7
6.1.1 Stack definition . 7
6.1.2 Optional features . 7
6.1.3 Compatibility . 7
6.2 Application layer requirements . 7
6.3 Presentation layer requirements. 7
6.4 Session layer requirements. 7
6.5 Transport layer requirements. 7
Annex A (normative) Application profile for DATEX-ASN profile requirement list . 8
Annex B (informative) Compatibility with other application profiles. 14
Bibliography . 15

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 committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 15784-3 was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
ISO 15784 consists of the following parts, under the general title Intelligent transport systems (ITS) — Data
exchange involving roadside modules communication:
⎯ Part 1: General principles and documentation framework of application profiles
⎯ Part 3: Application profile-data exchange (AP-DATEX)

iv © ISO 2008 – All rights reserved

Introduction
The functional requirements for communication between a traffic management centre and roadside modules
used for traffic management are varied because internationally there are many kinds of roadside modules for
traffic management, such as signal controllers, dynamic message signs and vehicle detectors. In the
development of standards for data exchanges between a traffic management centre and roadside modules
used for traffic management, ISO/TC 204/WG9 agreed that the concept of a single standard for all countries
and devices might not be appropriate, but a set of standards for different types of roadside module might be
more appropriate.
As a result, ISO/TC 204/WG9 adopted the philosophy of producing profile documents to specify how data
should be exchanged.
In the development of this part of ISO 15784, reference was made to the existing standards about profiles,
specifically NTCIP 8003 which is the US standard for a profile framework, and ISO/IEC TR 10000, which is a
series of Technical Reports under the general title Information technology — Framework and taxonomy of
International Standardized Profiles.
The purpose of a profile is to specify the use of one or more base standards to provide a requested function.
Because there are multiple functional requirements to data exchange between a centre and the roadside
modules, ISO 15784 defines multi-part profiles.
This part of ISO 15784 defines only the application profile. End application data is defined in the data-registry.
Each country should define lower layer profiles based on the internationally standardized protocols because
each country has its own circumstance on communication infrastructure.

INTERNATIONAL STANDARD ISO 15784-3:2008(E)

Intelligent transport systems (ITS) — Data exchange involving
roadside modules communication —
Part 3:
Application profile-data exchange (AP-DATEX)
1 Scope
The purpose of this part of ISO 15784 is to define an application profile referring ISO 14827 and other base
standards.
The application profile specified in this part of ISO 15784 is used to exchange data and messages in the
following cases.
a) Between a traffic management centre and roadside modules for traffic management.
b) Between roadside modules used for traffic management.
The scope of this part of ISO 15784 does not include the communication between roadside modules and in-
vehicle units, in-vehicle communication, in-cabinet communication or motion video transmission from a
camera or recorded media.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO/IEC 8825-1:2002, Information technology — ASN.1 encoding rules: Specification of Basic Encoding
Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) — Part 1
ISO/IEC TR 10000-2:1998, Information technology — Framework and taxonomy of International Standardized
Profiles — Part 2: Principles and Taxonomy for OSI profiles
ISO 14827-2:2005, Transport information and control systems — Data interfaces between centres for
transport information and control systems — Part 2: DATEX-ASN
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
application layer
layer containing all functions needed for the distributed applications and not already provided by the
presentation service
NOTE The application layer constitutes layer 7 of the OSI model.
3.2
base standard
approved international standard or a related authoritative standard
3.3
Basic Encoding Rules
BER
standardized determination of data encoding to conform to the requirements of ISO 8824, ASN.1
NOTE The Basic Encoding Rules are given in ISO 8825.
3.4
centre
computer or network that is required to meet a standardized communications interface over a fixed-point
communications network, regardless of whether it is the only system within the building or just one of many, or
even if it is located in the field
3.5
client
computer or application which requests and accepts data from a server computer or application using some
kind of protocol
3.6
compatibility
capability of two or more items or components of equipment or material to exist and/or function in the same
system or environment without modification, adaptation or mutual interference
3.7
data
information before it is interpreted
3.8
datagram
a self-contained unit of data transmitted independently of other datagram
3.9
data link layer
layer that manages frames and performs error detection and correction
NOTE The data link layer constitutes layer 2 of the OSI model. It can also be used to co-ordinate distribution of
physical connections.
3.10
data packet
entity of data that can be sent between end-application systems in order to exchange information
NOTE A data packet relates to the application layer of the OSI stack and may be broken into several pieces by lower
layer protocols.
3.11
encoding rules
rules which specify the representation during transfer of the values of ASN.1 types
NOTE Encoding rules also enable the values to be recovered from the representation, given knowledge of the type.
3.12
end-application
process or program using the communications stack
2 © ISO 2008 – All rights reserved

3.13
intelligent transport systems
major national initiative to improve information, communication and control technologies in order to improve
the efficiency of surface transport
3.14
internet protocol
network protocol offering a connectionless mode network service in the internet suite of protocols
3.15
message
set of data grouped together for transmission
3.16
network layer
layer that provides functional and procedural means of transferring variable length data sequences from a
source to a destination
NOTE The network layer constitutes layer 3 of the OSI model.
3.17
open systems interconnection
OSI
reference model developed by ISO to enable different or similar systems to dialogue with one another
NOTE 1 This model constitutes a reference framework for describing data exchanges. Each layer performs a service at
the request of the adjacent higher layer, and in turn, requests more basic services from the lower layers. It is described in
7 layers.
NOTE 2 Open systems interconnection (OSI) is an international effort to facilitate communications among computers of
different manufacture and technology.
3.18
physical layer
layer that defines the physical data transmission medium
NOTE The physical layer constitutes layer 1 of the OSI model.
3.19
port
logical channel in a communications system
NOTE UDP and TCP use port numbers to multiplex data packets from a variety of applications onto a single
communications system.
3.20
port number
identifier of an application-entity to a transport service in the internet suite of protocols
NOTE The concept of port numbers is often present in OSI literature; however, port numbers are not inter-network
standardized, but exist as local network conventions only.
3.21
presentation layer
layer that converts data using different syntax
NOTE The presentation layer constitutes layer 6 of the OSI model.
ISO 15784-3:20
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