oSIST prEN ISO 17575-4:2014

SLOVENSKI STANDARD
oSIST prEN ISO 17575-4:2014
01-februar-2014
Elektronsko pobiranje pristojbin - Definicija aplikacijskega vmesnika za
avtonomne sisteme - 4. del: Gostovanje (ISO/DIS 17575-4:2013)
Electronic fee collection - Application interface definition for autonomous systems - Part
4: Roaming (ISO/DIS 17575-4:2013)
Elektronische Gebührenerhebung - Definition der Anwendungsschnittstelle für autonome
Systeme - Teil 4: Roaming (ISO/DIS 17575-4:2013)
Perception du télépéage - Définition de l'interface d'application pour les systèmes
autonomes - Partie 4: Itinérance (ISO/DIS 17575-4:2013)
Ta slovenski standard je istoveten z: prEN ISO 17575-4
ICS:
03.220.20 Cestni transport Road transport
35.240.60 Uporabniške rešitve IT v IT applications in transport
transportu in trgovini and trade
oSIST prEN ISO 17575-4:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 17575-4:2014

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oSIST prEN ISO 17575-4:2014
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17575-4
ISO/TC 204 Secretariat: ANSI
Voting begins on: Voting terminates on:
2013-12-12 2014-05-12
Electronic fee collection — Application interface definition
for autonomous systems —
Part 4:
Roaming
Perception du télépéage — Définition de l’interface d’application pour les systèmes autonomes —
Partie 4: Itinérance
[Revision of first edition (ISO/TS 17575-4:2011)]
ICS: 35.240.60;03.220.20
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments
received, will be submitted to a parallel two-month approval vote in ISO and
THIS DOCUMENT IS A DRAFT CIRCULATED
formal vote in CEN.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 17575-4:2013(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2013

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oSIST prEN ISO 17575-4:2014
ISO/DIS 17575-4:2013(E)

Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as
permitted under the applicable laws of the user’s country, neither this ISO draft nor any extract
from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means,
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Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2013 – All rights reserved

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oSIST prEN ISO 17575-4:2014
ISO/DIS 17575-4
Contents Page
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative References . 1
3 Terms and definitions . 1
4 Abbreviated terms . 4
5 Basic concept . 4
5.1 General . 4
5.2 Overview . 5
6 Data elements . 6
6.1 General . 6
6.2 Elements of the roaming rules attribute . 7
6.2.1 The roaming rule identifier . 7
6.2.2 The list of relevant EFC contexts . 7
6.2.3 The list of EFC contexts which are grouped using a single charge report . 9
6.2.4 House keeping data elements . 9
7 Communicating the roaming rules attribute . 10
7.1 Requesting an update of the roaming rules attribute . 10
7.2 Responding to a roaming rules download request . 10
7.3 ASN1 coding rules . 10
Annex A (normative) EFC data type specifications . 11
Annex B (normative) Protocol implementation conformance statement (PICS) proforma . 14
B.1 General . 14
B.2 General . 14
B.3 Purpose and structure . 14
B.4 Instruction for completing the PICS Proforma . 14
B.4.1 Definition of support . 14
B.4.2 Status column . 15
B.4.3 Support column . 15
B.4.4 Item reference numbers . 15
B.5 PICS proforma for the Front End . 16
B.5.1 Identification of the implementation . 16
B.5.2 Identification of the standard . 17
B.5.3 Global statement of conformance . 17
B.5.4 PICS proforma tables . 17
B.6 PICS proforma for the Back End . 20
B.6.1 Identification of the implementation . 20
B.6.2 Identification of the standard . 21
B.6.3 Global statement of conformance . 21
B.6.4 PICS proforma tables . 22
Annex C (informative) How to assemble and use roaming data . 24
C.1 General . 24
C.2 First to decide on the required different sets of roaming data . 24
C.3 Next to assemble specific context data sets . 25
C.4 Next to combine EFC contexts to EFC rwegimes . 25
C.5 Finally to assign groups of Users to single sets of roaming rules . 25
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ISO/DIS 17575-4
Annex D (informative) Use of this standard for the EETS .27
D.1 General .27
D.2 Overall relationship between European standardisation and the EETS .27
D.3 European standardisation work supporting the EETS .27
D.4 Correspondence between this standard and the EETS .28
Bibliography .29


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oSIST prEN ISO 17575-4:2014
ISO/DIS 17575-4
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 17575-4 was prepared by Technical Committee ISO/TC 204, Intelligent Transport Systems,
Subcommittee SC , and by Technical Committee CEN/TC 278, Intelligent Transport Systems in collaboration.
This second/third/. edition cancels and replaces the first/second/. edition (), [clause(s) / subclause(s) /
table(s) / figure(s) / annex(es)] of which [has / have] been technically revised.
This second edition cancels and replaces the first edition (ISO/TS 17575 Part 4:2011) which has been
technically revised. The main changes comprise
¾ upgrade of the first edition from a Technical Specification to an International Standard
¾ editorial and formal corrections as well as changes to improve readability
ISO 17575 consists of the following parts, under the general title Electronic fee collection — Application
interface definition for autonomous systems:
¾ Part 1: Charging
¾ Part 2: Communication and connection to the lower layers
¾ Part 3: Context data
¾ Part 4: Roaming
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oSIST prEN ISO 17575-4:2014
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Introduction

Autonomous systems
This part of ISO 17575 is part of a series of four specifications defining the information exchange between the
Front End and the Back End in Electronic Fee Collection (EFC) based on autonomous on-board equipment
(OBE). EFC systems automatically collect charging data for the use of road infrastructure including motorway
tolls, zone-based fees in urban areas, tolls for special infrastructure like bridges and tunnels, distance-based
charging, and parking fees.
NOTE 1 The Front End comprises the on-board equipment and an optional proxy.
NOTE 2 The OBE does not need to include payment means.
Autonomous 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). These EFC systems are referred to by a variety of names. Besides the terms autonomous systems and
GNSS/CN systems, also the terms GPS/GSM systems, and wide-area charging systems are in use.
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.
Some of the strengths of the autonomous approach to electronic fee collection are its flexibility, allowing the
implementation of almost all conceivable charging principles, and its independence from local infrastructure,
thereby predisposing this technology towards interoperability across charging systems and countries.
Interoperability can only be achieved with clearly defined interfaces, which is the aim and justification of ISO
17575.
Business architecture
This part of ISO 17575 complies with the business architecture defined in ISO 17573. According to this
architecture, the Toll Charger is the provider of the road infrastructure and, hence, the recipient of the road
usage charges. The Toll Charger is the actor associated with the Toll Charging role. See Figure 1.
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oSIST prEN ISO 17575-4:2014
ISO/DIS 17575-4
Interoperability
Management
Service
Provision
Toll
Charging
Service Usage

Figure 1 — The rolebased model underlying this International Standard
Service Providers issue OBE to the users of the road infrastructure. Service Providers are responsible for
operating the OBE that will record the amount of road usage in all toll charging systems the vehicle passes
through and for delivering the charging data to the individual Toll Chargers. In general, each Service Provider
delivers charging data to several Toll Chargers, as well as each Toll Charger in general receives charging
data from more than one Service Provider. Interoperability Management in Figure 1 comprises all
specifications and activities that in common define and maintain a set of rules that govern the overall toll
charging environment.
Technical architecture
The technical architecture of Figure 2 is independent of any particular practical realization. It reflects the fact
that some processing functionalities can either be allocated to the OBE or to an associated off-board
component (Proxy). An example of processing functionality that can be realized either on- or off-board is
map-matching, where the vehicle locations in terms of measured coordinates from GNSS are associated to
geographic objects on a map that either resides on- or off-board. Also tariffication can be done with OBE tariff
tables and processing, or with an off-board component.
Scope of
ISO 17575
Proxy
Processing Equipment
OBE
Front End Back End
Road Usage Data
Context Data

Figure 2 — Assumed technical architecture and interfaces
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The combined functionality of OBE and Proxy is denoted as Front End. A Front End implementation where
processing is predominately on OBE-side is known as a smart client (or intelligent client, fat client) or
edge-heavy. A Front End where processing is mostly done off-board is denoted as thin-client or edge-light
architecture. Many implementations between the “thin” and “thick” extremes are possible, as depicted by the
gradual transition in the wedges in Figure 2. Both extremes of architectural choices have their merits and are
one means where manufacturers compete with individual allocations of functionality between on-board and
central resources.
Especially for thin client OBE, manufacturers might devise a wide variety of optimizations of the transfer of
localization data between OBE and off board components, where proprietary algorithms are used for data
reduction and data compression. Standardization of this transfer is neither fully possible nor beneficial.
Location of the specification interface
In order to abstract from, and become independent of, these architectural implementation choices, the primary
scope of ISO 17575 is the data exchange between Front End and Back End (see the corresponding dotted
line in Figure 2). For every toll regime, the Back End will send context data, i.e. a description of the toll regime
in terms of charged objects, charging rules and, if required, the tariff scheme to the Front End, and will receive
usage data from the Front End.
It has to be noted also that the distribution of tasks and responsibilities between Service Provider and Toll
Charger will vary individually. Depending on local legal situation, Toll Chargers will require “thinner” or
“thicker” data, and might or might not leave certain data processing tasks to Service Providers. Hence, the
data definitions in ISO 17575 may be useful on several interfaces.
ISO 17575 also provides for basic media-independent communication services that may be used for
communication between Front End and Back End, which might be line-based or an air-link, and can also be
used for the air-link between OBE and central communication server.
The parts of ISO 17575
Part 1: Charging, defines the attributes for the transfer of usage data from the Front End to the Back End. The
required attributes will differ from one Toll Charger to another, hence, attributes for all requirements are
offered, ranging from attributes for raw localization data, for map-matched geographic objects and for
completely priced toll transactions.
Part 2: Communication and connection to lower layers, defines basic communication services for data transfer
over the OBE air-link or between Front End and Back End.
Part 3: Context Data, defines the data to be used for a description of individual charging systems in terms of
charged geographical objects and charging and reporting rules. For every Toll Charger's system, attributes as
defined in Part 3 are used to transfer data to the Front End in order to instruct it which data to collect and
report.
Part 4: Roaming, defines the functional details and data elements required to operate more than one EFC
regime in parallel. The domains of these EFC regimes may or may not overlap. The charge rules of different
overlapping EFC regimes can be linked, i.e. they may include rules that an area pricing scheme will not be
charged if an overlapping toll road is used and already paid for.
Relations between single EFC schemes can be
¾ EFC domains that can adjoin each other so that when moving from one EFC domain in the domain of the
adjacent EFC regime there may be a zone where the OBE starts to operate according to the rules of the
new regime before stopping the operation according to the old regime rules. Within this zone the
OBE/Front-End needs to operate according to the rules for both of these schemes at the same time.
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¾ Overlapping EFC contexts that can have dependencies in the charge object definition like overlapping
areas where the outer/bigger area will not be charged when in the inner area. Or an area will not be
charged when using a sectioned toll-road in the same area.
¾ Required to combine several usage statements for different EFC schemes in the same charge report.
The data elements (ADUs) required to specify these related properties are defined in this part of ISO 17575.
Back End Front End
Back End Front End
Application Application
BE calls Front End calls
Scope of
ADU
communication communication
this suite of
Functions for EFC Functions for EFC
standards
communication communication
service primitives
service primitives
data communication service

Figure 3 — Scope of ISO 17575
To communicate these ADUs between the Front End and the Back End, the same methodology as for ISO
17575-1 and ISO 17575-3 is applied as illustrated in Figure 3. The use of the communication stack is defined
in ISO 17575-2.
Application needs covered by ISO 17575
¾ The parts of ISO 17575 are compliant with the architecture defined in ISO 17573.
¾ The parts of ISO 17575 support charges for use of road sections (including bridges, tunnels, passes,
etc.), passage of cordons (entry/exit), and use of infrastructure within an area (distance, time).
¾ The parts of ISO 17575 support fee collection based on units of distance or duration, and based on
occurrence of events.
¾ The parts of ISO 17575 support modulation of fees by vehicle category, road category, time of usage, and
contract type (e.g. exempt vehicles, special tariff vehicles, etc.)
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¾ The parts of ISO 17575 support limiting of fees by a defined maximum per period of usage.
¾ The parts of ISO 17575 support fees with different legal status (e.g. public tax, private toll).
¾ The parts of ISO 17575 support differing requirements of different Toll Chargers, especially in terms of
¾ geographic domain and context descriptions,
¾ contents and frequency of charge reports,
¾ feedback to the driver (e.g. green or red light), and
¾ provision of additional detailed data on request, e.g. for settling of disputes.
¾ The parts of ISO 17575 support overlapping geographic toll domains.
¾ The parts of ISO 17575 support adaptations to changes in
¾ tolled infrastructure,
¾ tariffs, and
¾ participating regimes.
¾ The parts of ISO 17575 support the provision of trust guarantees by the Service Provider to the Toll
Charger for the data originated from the Front End.

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oSIST prEN ISO 17575-4:2014
DRAFT INTERNATIONAL STANDARD ISO/DIS 17575-4

Electronic fee collection — Application interface definition for
autonomous systems — Part 4: Roaming
1 Scope
Roaming in the context of this part of ISO 17575 is understood as the ability of a Front End to operate in more
than one EFC context either consecutively or at the same time. Data elements required defining operational
properties of a single EFC context are defined in ISO 17575-3. The additional data elements required
providing interoperability in overlapping and/or interdependent EFC contexts are defined in this part of ISO
17575.
A set protocol implementation conformance statement (PICS) proforma is specified in Annex B.
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 8824-1, Information technology — Abstract Syntax Notation One (ASN.1): Specification of basic
notation
ISO/IEC 8825-2, Information technology — ASN.1 encoding rules: Specification of Packed Encoding Rules (PER)
ISO 17573, Electronic fee collection — Systems architecture for vehicle-related tolling
ISO 14906:20011, Electronic fee collection — Application interface definition for dedicated short-range
communication
ISO 17575-1, Electronic fee collection — Application interface definition for autonomous systems — Part 1:
Charging
ISO 17575-2, Electronic fee collection — Application interface definition for autonomous systems — Part 2:
Communication and connection to the lower layers
ISO 17575-3, Electronic fee collection — Application interface definition for autonomous systems — Part 3:
Context data
EN 15509:2013, Electronic fee collection — Interoperability application profile for DSRC


3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
attribute
addressable package of data consisting of a single data element or structured sequences of data elements
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ISO/DIS 17575-4
[ISO 14906:2011]
3.2
authentication
provision of assurance that a claimed characteristic of an entity is correct
[ISO 2700]
3.3
authenticator
data, possibly encrypted, that is used for authentication
[ISO 14906:2011]
3.4
Back End
computing and communication facilities of an actor (e.g. a Toll Charger or a Toll Service Provider) exchanging
data with a Front or Back End
[ISO/TS 16410:2011]
3.5
Contracted EFC context
EFC context for which an individual user has the contractual consent that his or her Front End is interoperable
3.6
Front End
parts of the toll system where usage data for an individual user are collected, processed and delivered to the
Back End
[ISO 16403-2:2012]
3.7
interoperability
ability of systems to exchange information and to make mutual use of the information that has been
exchanged
[CEN/TR 16092:2011]
3.8
on-board equipment
OBE
equipment located on-board a vehicle including nomadic devices with the function of exchanging information
with external systems
[ISO 14906:2011]
3.9
proxy
optional part of a Front End that communicates with external equipment and processes the data received into
an agreed format to be delivered to the Back End
[ISO/TS 17575-1:2010]
3.10
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ISO/DIS 17575-4
roadside equipment
equipment located along the road, ether fixed or mobile
[ISO 17574:2009]

3.11
service provider
toll service provider
entity providing toll services in one or more toll domains
[CEN/TR 16092:2011]
3.12
toll
any charge, tax or duty levied in relation with using a vehicle in a toll domain
[CEN/TR 16092:20011]
3.13
toll charger
entity which levies toll for the use of vehicles in a toll domain
[CEN/TR 16092:20011]
3.14
toll cluster
a group of toll schemes operating under a common agreement providing interoperability for road users having
a contract with a service provider being part of the cluster
[ISO/TS 17575-120110]
3.15
toll context
logical view as defined by attributes and functions of the basic elements of a toll scheme consisting of a single
basic tolling principle, a spatial distribution of the charge objects and a single behavior of the related front end
[ISO/TS 1
...