ISO 14827-2:2022 高度道路交通システム — 交通情報センターと制御システムの間のデータ インターフェイス — Part 2: AP-DATEX | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.

This second edition cancels and replaces the first edition (ISO 14827-2:2005), which has been technically revised.

The main changes are as follows:

• the title has been modified;
• the concept of a platform-independent model (PIM) as defined in ISO/TS 19468 has been integrated;
• the message format previously defined in ISO 14827-1:2005 (to be withdrawn) has been included.

A list of all parts in the ISO 14827 series can be found on the ISO website.

Introduction

Data exchange among centres is a baseline service for implementing intelligent transport system (ITS) services. For interoperability purposes, data delivery and collaborative ITS services need to be implemented according to certain specifications based on fully-described interfaces.

This document has been revised based on the concept of a platform-independent model (PIM) as defined in ISO/TS 19468, maintaining backward compatibility with ISO 14827-2:2005 and taking into consideration the future withdrawal of ISO 14827-1:2005.

The development of the first editions of ISO 14827-1 and ISO 14827-2 began in the 1990s. These documents were published in 2005 based on European DATEX. Since then, the exchange environment of traffic information and traffic data has made a great deal of progress and DATEX II has been developed, enabling the distribution of traffic information and traffic management information in a way that is not dependent on language and presentation format. DATEX II is closely related to ISO/TS 19468. ISO/TS 19468 aims to describe the general exchange specification technology and to describe interaction through a high-level model which is not dependent on a specific technology in a model-driven approach; it defines functional exchange profiles by several possible exchange patterns.

According to this concept, ISO 14827-2 (this document) was revised as a platform-specific model for AP-DATEX (application profile-data exchange) and other Internet protocol (IP) networks. The relationship between ISO/TS 19468 and the ISO 14827 series (including this document) is shown in Figure 1. This document aims to define and describe the data exchange requirements using TCP/UDP (transmission control protocol/user datagram protocol) datagrams (defined as “DATEX-ASN”) and the basics of ASN.1 messages, as defined in ISO 14827-1.

This document is not intended to conflict with existing International Standards on interfaces of data exchange among ITS centres.

Figure 1—Relationship between exchange-related documents

Key

PIM	platform-independent model
EP	exchange pattern
FEP	functional exchange profile
PSM	platform-specific model

1 Scope

This document defines a platform-specific model (PSM) for data exchange, which specifically uses ASN.1 and TCP/UDP (transmission control protocol/user datagram protocol) datagrams which were defined as “DATEX-ASN” in the first edition of this document for AP-DATEX (application profile-data exchange) and other Internet protocol (IP) networks. A PSM is an actual implementation of a platform-independent model (PIM) for exchange. This document specifies the message rules and procedures for communication between different systems for ITS using TCP/UDP datagrams.

This document deals mainly with the communication interfaces. It has been designed to meet the unique requirements of intelligent transport systems (ITS). However, it has also been designed in a generic fashion and thus can be used for other data exchanges as well.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO/TS 19468 and the following apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

Bibliography