ISO 29281-2:2019

INTERNATIONAL ISO
STANDARD 29281-2
Second edition
2019-01
Intelligent transport systems —
Localized communications —
Part 2:
Legacy system support
Systèmes intelligents de transport — Communications localisées —
Partie 2: Support pour systèmes hérités
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 2
5 Requirements . 2
6 Architecture . 3
6.1 ITS station . 3
6.2 Communication scenarios . 3
6.3 Implementation scenarios . 3
6.4 15628 legacy CIs . 4
6.5 15628 legacy applications. 5
7 Facilities layer protocols . 6
7.1 General . 6
7.2 FSAP communication handler . 6
7.3 Legacy CI Port Agent . 6
7.4 15628 kernel emulator . 7
7.4.1 15628 legacy applications . 7
7.4.2 CI classes . 7
7.4.3 Registration of 15628 legacy applications . 7
7.4.4 Service operation phase . 8
7.5 Basic primitive application functions . 8
8 Conformance . 8
9 Test methods . 9
Annex A (normative) ASN.1 .10
Annex B (normative) 15628 legacy CI .11
Annex C (informative) 15628 legacy service guidelines .17
Bibliography .27
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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electrotechnical standardization.
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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
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Attention is drawn to the possibility that some of the elements of this document may be the subject of
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.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
This second edition cancels and replaces the first edition (ISO 29281-2:2013), which has been technically
revised. It also incorporates the Amendment ISO 29281-2:2013/Amd 1:2014.
A list of all parts of the ISO 29281 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 © ISO 2019 – All rights reserved

Introduction
This document is part of a family of International Standards for communications in Intelligent Transport
Systems (ITS) based on the ITS station and communication architecture specified in ISO 21217:2014.
This document is Part 2 of a multipart series of International Standards which determines functionalities
of ITS localized communications related to the legacy communications application layer specified in
ISO 15628. These functionalities are protocols and procedures located in the various layers and entities
of the ITS station.
INTERNATIONAL STANDARD ISO 29281-2:2019(E)
Intelligent transport systems — Localized
communications —
Part 2:
Legacy system support
1 Scope
This document specifies elements of communications for localized communications in ITS.
In particular, the following architectures, procedures and protocols are specified:
— support of communication interfaces (DSRC-CI) using the DSRC application layer specified in
ISO 15628;
— support of ISO 15628 DSRC applications via an ITS access technology suited for localized
communications.
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.
ISO/IEC 8825-2, Information technology — ASN.1 encoding rules: Specification of Packed Encoding Rules
(PER) — Part 2
ISO 15628, Intelligent transport systems — Dedicated short range communication (DSRC) — DSRC
application layer
ISO 17419, Intelligent transport systems — Cooperative systems — Globally unique identification
ISO 17423, Intelligent transport systems — Cooperative systems — Application requirements and objectives
ISO 21217, Intelligent transport systems — Communications access for land mobiles (CALM) — Architecture
ISO 21218, Intelligent transport systems — Hybrid communications — Access technology support
ISO 22418, Intelligent transport systems — Fast service announcement protocol (FSAP)
ISO 24102-1, Intelligent transport systems — ITS station management — Part 1: Local management
ISO 24102-3, Intelligent transport systems — ITS station management — Part 3: Service access points
ISO 24102-4, Intelligent transport systems — ITS station management — Part 4: Station-internal
management communications
ISO 24103, Intelligent transport systems — Communications access for land mobiles (CALM) — Media
adapted interface layer (MAIL)
ISO 29281-1, Intelligent transport systems — Localized communications — Part 1: Fast networking &
transport layer protocol (FNTP)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
15628 legacy CI
communication interface design in support of the ISO 15628 application layer
3.2
15628 legacy service
application layer service specified in ISO 15628
3.3
DSRC application layer
application layer specified in ISO 15628
3.4
15628 legacy application
ITS application using the ISO 15628 application layer
4 Symbols and abbreviated terms
DSRC Dedicated short range communication
NOTE The term DSRC has two meanings. One indicates IEEE 802.11 OCB communications at 5,9 GHz,
standardized for ITS in ISO 21215. The other one indicates communications at 5,8 GHz such as the European
[3]
DSRC backscatter technology standardized in EN 12253 , and the Japanese active transceiver technology
[9] [10]
standardized in ARIB STD-T75 and ARIB STD-T110 . The latter meaning of DSRC applies in this document.
5 Requirements
Communication functionality, which is different to the functionality of networked communications,
e.g. functionality out of the set of Internet protocols (IP), is referred to as localized communications
functionality in this document.
The functionality to support legacy systems, especially those related to ISO 15628 "DSRC application
layer" shall be as specified in this document.
Detailed requirements are specified in the following clauses of this document.
— Clause 6 specifies architectural elements.
— Clause 7 specifies facility layer protocols
— Clause 8 specifies conformance declaration.
— Clause 9 specifies test methods.
— Annexes A and B provide further mandatory requirements.
— The informative Annex C provides 15628 legacy service guidelines.
2 © ISO 2019 – All rights reserved

6 Architecture
6.1 ITS station
The specifications given in this document shall comply with the ITS station architecture and with the
concept of an ITS station communication unit (ITS-SCU) as specified in ISO 21217 and ISO 24102-4.
6.2 Communication scenarios
General ITS communication scenarios are illustrated in ISO 21217. Specific comm
...