ISO/TR 16401-2:2018

TECHNICAL ISO/TR
REPORT 16401-2
First edition
2018-01
Electronic fee collection — Evaluation
of equipment for conformity to ISO
17575-2 —
Part 2:
Abstract test suite
Perception du télépéage — Évaluation de conformité de l'équipement
à l'ISO 17575-2 —
Partie 2: Suite d'essai abstraite
Reference number
©
ISO 2018
© ISO 2018, Published in Switzerland
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ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Abstract test method (ATM) . 3
5.1 Implementations under tests . 3
5.1.1 Front End (FE) . 3
5.1.2 Back End (BE) . . 3
5.2 Test architecture . 3
5.3 Protocol Implementation Extra Information for Testing (PIXIT). 3
6 Untestable test purposes (TP) . 4
7 ATS data structures . 4
7.1 General . 4
7.2 Common data types . 4
8 External functions . 4
9 Message filtering . 4
10 ATS naming conventions. 4
10.1 Definition naming conventions . 4
10.2 Test case identifier . 6
10.3 TTCN-3 modules identifier . 6
Annex A (informative) TTCN-3 library modules for FE and BE . 7
Annex B (informative) PIXIT proforma for Front End Communications API and Front
End application . 8
Bibliography .10
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.
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 on 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 the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
This first edition of ISO/TR 16401-2 cancels and replaces ISO/TS 16401-2:2012, which has been
technically revised.
The main changes compared to the previous edition are as follows:
— conversion from a Technical Specification to Technical Report has been made;
— the terms and definitions have been revised;
— editorial and formal corrections as well as changes to improve readability have been made.
A list of all parts in the ISO 16401 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

Introduction
This document is part of a set of standards that supports interoperability of autonomous electronic fee
collection (EFC) systems. Autonomous systems use satellite positioning, often combined with additional
sensor technologies such as gyroscopes, odometers, and accelerometers, to localize the vehicle and to
find its position on a map containing the charged geographic objects, such as charged roads or charged
areas. From the charged objects, the vehicle characteristics, the time of day and other data that are
relevant for describing road use, the tariff and ultimately the road usage fee are determined.
The ISO/TR 16401 series provides tests to assess the Front End Communications API and Front End
application behaviours compliancy towards the requirements listed in ISO 17575-2. ISO/TR 16401-1
contains the definition of such tests in the form of test purposes, listing the initial conditions, references
and individual steps in a structured textual manner. This document contains the identical tests written
in Testing and Test Control Notation version 3 (TTCN-3).
Autonomous on-board equipment (OBE) operates without relying on dedicated road-side infrastructure
by employing wide-area technologies such as Global Navigation Satellite Systems (GNSS) and Cellular
Communications Networks (CN). Therefore, autonomous systems may also be referred to as GNSS/CN
systems.
Within the suite of EFC standards, this document defines tests for conformity evaluation of Front End
and Back End that comply with the requirements towards the context data specified in ISO 17575-2.
This document is intended to
— assess Front End Communications API and Front End application capabilities,
— assess Front End Communications API and Front End application behaviour,
— serve as a guide for Front End Communications API and Front End application conformance
evaluation and type approval,
— achieve comparability between the results of the corresponding tests applied in different places at
different times, and
— facilitate communications between parties.
TECHNICAL REPORT ISO/TR 16401-2:2018(E)
Electronic fee collection — Evaluation of equipment for
conformity to ISO 17575-2 —
Part 2:
Abstract test suite
1 Scope
This document contains the definition of test cases, reflecting the individual steps listed in specific test
purposes defined in ISO/TR 16401-1. The test cases are written in Testing and Test Control Notation
version 3 (TTCN-3).
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 17575-1, Electronic fee collection — Application interface definition for autonomous systems — Part 1:
Charging
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 17575-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
conformance testing
testing the extent to which an IUT is a conforming implementation
[SOURCE: ISO/IEC 9646-1:1994, 3.3.23]
3.2
Front End application
part of the Front End above the API
[SOURCE: ISO/TR 16401-1:2017, 3.12]
3.3
implementation under test
IUT
implementation of one or more OSI protocols in an adjacent user/provider relationship, being that part
of a real open system which is to be studied by testing
[SOURCE: ISO/IEC 9646-1:1994, 3.3.43]
...