Electronic fee collection - Interface definition for on-board account using integrated circuit card (ICC) (ISO/TS 25110:2013)

ISO/TS 25110:2013 defines the data transfer models between roadside equipment (RSE) and integrated circuit card (ICC), and the interface descriptions between RSE and on-board equipment (OBE) for on-board account using ICC. It also provides examples of interface definitions and transactions deployed in several countries.

Elektronische Gebührenerhebung - Schnittstellendefinition für die fahrzeugseitige bordeigene Datenverwaltung mit Chipkarte (ICC) (ISO/TS 25110:2013)

Perception du télépéage - Définition d'interface pour compte de bord utilisant une carte à circuit intégré (ICC) (ISO/TS 25110:2013)

Elektronsko pobiranje pristojbin - Definicija vmesnika za obračun pristojbin, ki uporablja kartico z integriranim vezjem (ICC) (ISO/TS 25110:2013)

Ta tehnična specifikacije definira načine prenosa podatkov med obcestno opremo (RSE) in kartico z integriranim vezjem (ICC) ter opise vmesnikov med obcestno opremo in opremo v vozilu za obračun pristojbin, ki uporablja kartico z integriranim vezjem. Podaja tudi primere definicij vmesnika in transakcije, ki se uporabljajo v več državah.
Ta tehnična specifikacija zajema:
– načine prenosa podatkov med obcestno opremo in kartico z integriranim vezjem, ki ustreza kategoriziranim zahtevam delovanja, ter način prenosa podatkov za vsak model;
– definicijo vmesnika med obcestno opremo in kartico z integriranim vezjem, ki temelji na posameznem modelu prenosa podatkov;
– definicija vmesnika za vsak model vsebuje
– funkcionalno konfiguracijo,
– definicije upravljanja obcestne opreme za dostop s kartico z integriranim vezjem in
– obliko podatkov in definicije elementov podatkov ukazov za obcestno opremo;
– primer prenosa za vsak model v dodatku B.

General Information

Status
Withdrawn
Publication Date
14-May-2013
Withdrawal Date
05-Dec-2017
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
06-Dec-2017

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SLOVENSKI STANDARD
SIST-TS CEN ISO/TS 25110:2013
01-julij-2013
1DGRPHãþD
SIST-TS CEN ISO/TS 25110:2009
(OHNWURQVNRSRELUDQMHSULVWRMELQ'HILQLFLMDYPHVQLND]DREUDþXQSULVWRMELQNL
XSRUDEOMDNDUWLFR]LQWHJULUDQLPYH]MHP ,&&  ,6276

Electronic fee collection - Interface definition for on-board account using integrated circuit

card (ICC) (ISO/TS 25110:2013)

Elektronische Gebührenerhebung - Schnittstellendefinition für die fahrzeugseitige

bordeigene Datenverwaltung mit Chipkarte (ICC) (ISO/TS 25110:2013)

Perception du télépéage - Définition d'interface pour compte de bord utilisant une carte à

circuit intégré (ICC) (ISO/TS 25110:2013)
Ta slovenski standard je istoveten z: CEN ISO/TS 25110:2013
ICS:
03.220.01 Transport na splošno Transport in general
35.240.60 Uporabniške rešitve IT v IT applications in transport
transportu in trgovini and trade
SIST-TS CEN ISO/TS 25110:2013 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CEN ISO/TS 25110:2013
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SIST-TS CEN ISO/TS 25110:2013
TECHNICAL SPECIFICATION
CEN ISO/TS 25110
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
May 2013
ICS 35.240.60; 03.220.01 Supersedes CEN ISO/TS 25110:2008
English Version
Electronic fee collection - Interface definition for on-board
account using integrated circuit card (ICC) (ISO/TS 25110:2013)

Perception du télépéage - Définition d'interface pour Elektronische Gebührenerhebung - Schnittstellendefinition

compte de bord utilisant une carte à circuit intégré (ICC) für die fahrzeugseitige bordeigene Datenverwaltung mit

(ISO/TS 25110:2013) Chipkarte (ICC) (ISO/TS 25110:2013)

This Technical Specification (CEN/TS) was approved by CEN on 11 May 2013 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their

comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available

promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)

until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TS 25110:2013: E

worldwide for CEN national Members.
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SIST-TS CEN ISO/TS 25110:2013
CEN ISO/TS 25110:2013 (E)
Contents Page

Foreword ..............................................................................................................................................................3

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SIST-TS CEN ISO/TS 25110:2013
CEN ISO/TS 25110:2013 (E)
Foreword

This document (CEN ISO/TS 25110:2013) has been prepared by Technical Committee ISO/TC 204

"Intelligent transport systems" in collaboration with Technical Committee CEN/TC 278 “Road transport and

traffic telematics” the secretariat of which is held by NEN.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes CEN ISO/TS 25110:2008.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus,

Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,

Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,

Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO/TS 25110:2013 has been approved by CEN as CEN ISO/TS 25110:2013 without any

modification.
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SIST-TS CEN ISO/TS 25110:2013
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SIST-TS CEN ISO/TS 25110:2013
TECHNICAL ISO/TS
SPECIFICATION 25110
Second edition
2013-05-15
Electronic fee collection — Interface
definition for on-board account using
integrated circuit card (ICC)
Perception du télépéage — Définition d’interface pour compte de
bord utilisant une carte à circuit intégré (ICC)
Reference number
ISO/TS 25110:2013(E)
ISO 2013
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SIST-TS CEN ISO/TS 25110:2013
ISO/TS 25110:2013(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2013

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
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SIST-TS CEN ISO/TS 25110:2013
ISO/TS 25110:2013(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 2

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Abbreviations........................................................................................................................................................................................................... 6

5 Data transfer model .......................................................................................................................................................................................... 6

5.1 Overview ...................................................................................................................................................................................................... 6

5.2 Symbols ......................................................................................................................................................................................................... 7

5.3 Transparent type ................................................................................................................................................................................... 7

5.4 Caching type .............................................................................................................................................................................................. 8

5.5 Buffering type .......................................................................................................................................................................................... 9

6 Interface definition for ICC access ...................................................................................................................................................10

6.1 Transparent type ................................................................................................................................................................................10

6.2 Caching type ...........................................................................................................................................................................................11

6.3 Buffering type .......................................................................................................................................................................................12

Annex A (informative) On-board account requirements ..............................................................................................................14

Annex B (informative) Example of an ICC access method ............................................................................................................16

Annex C (informative) Interoperability relation with other sectors ................................................................................31

Bibliography .............................................................................................................................................................................................................................33

© ISO 2013 – All rights reserved iii
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SIST-TS CEN ISO/TS 25110:2013
ISO/TS 25110:2013(E)
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.

In other circumstances, particularly when there is an urgent market requirement for such documents, a

technical committee may decide to publish other types of document:

— an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical

experts in an ISO working group and is accepted for publication if it is approved by more than 50 %

of the members of the parent committee casting a vote;

— an ISO Technical Specification (ISO/TS) represents an agreement between the members of a

technical committee and is accepted for publication if it is approved by 2/3 of the members of the

committee casting a vote.

An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for

a further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or

ISO/TS is confirmed, it is reviewed again after a further three years, at which time it must either be

transformed into an International Standard or be withdrawn.

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/TS 25110 was prepared by Technical Committee ISO/TC 204, Intelligent transport systems, and

CEN/TC 278, Road transport and traffic telematics.

This second edition cancels and replaces the first edition (ISO/TS 25110:2008), which has been

technically revised.
iv © ISO 2013 – All rights reserved
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SIST-TS CEN ISO/TS 25110:2013
ISO/TS 25110:2013(E)
Introduction
Background and motivation

There are two payment systems dealing with electronic fee collection (EFC). The first is the central

account system using a one-piece on-board unit (OBU), and the second is the on-board account system

using a payment media such as the integrated circuit card (ICC).

ICCs have been widely used for public transport cards such as subway and bus payment means, and

electronic money cards for general purpose payments, as well as for credit cards and banking cards. ICC

is expected to be used for EFC payment means along with these global trends and provides convenience

and flexibility.

Currently, the descriptions in the existing EFC related international standards are focused on the central

account system, which is rather simple and gives more feasibility for EFC interoperability than the on-

board account system, which is complex and has more items to be settled.

With consideration of widespread use for transport cards or electronic money cards, a new international

standard relating the on-board account system using those ICCs is strongly required as shown in

Figure 1. Furthermore, a state-of-the-art mobile phone integrated with ICC functions, a so-called

“mobile electronic purse”, has been used for public transport or retail shopping as a payment means in

some countries so rapidly that standardization on this theme is important and essential for considering

future EFC payment methods as well.
< OBE main body >
- Communication control
< One-piece OBU >
- EFC Application control
- Communication control
- EFC Application control - EFC related data
- EFC related data
- Payment related data
Functionally
separated Result: more
< IC card or other medi a>
convenient
- Payment related data
and lexible
Use: existing cards such as
public transport card or
credit card etc.,
or new future media
Figure 1 — Motivation for on-board account using ICC

Figure 2 shows the scope of the EFC standards, in which the OBU is used as a communication means and

the ICC carries the payment means.
© ISO 2013 – All rights reserved v
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CN/GNSS
DSRC
SIST-TS CEN ISO/TS 25110:2013
ISO/TS 25110:2013(E)
PAPAYMENYMENT SYSTT SYSTEM EM A A PAPAYMENYMENT SYSTT SYSTEM EM B B
ISSUER
ISSUER
COCOLLELLECTIOCTION/N/
CLEARING
CLEARING CLEARING
CLEARING
LOLOADADININGG
SESERVRVICICE E
PRPROVOVIDIDERER
USER
USER
IC Card
OBU
IC Card
OBU
Figure 2 — Illustration of the scope of the EFC standards
Objective

The objective of this Technical Specification is to classify data transfer models based on operational

requirements, and define a specific ICC access interface for on-board account using ICC for each model.

Furthermore, this Technical Specification provides practical examples of transactions in Annex B, for

consideration and easy adoption by toll road operators.
Use

This Technical Specification provides a common technical platform for on-board accounts using ICCs to

deal with various operational requirements, and practical examples of on-board accounts actually used

or planned in several countries.

Each toll road operator can establish their own specification by selecting an example of the models in

this Technical Specification (like a tool box) so as to meet their requirements.
vi © ISO 2013 – All rights reserved
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SIST-TS CEN ISO/TS 25110:2013
TECHNICAL SPECIFICATION ISO/TS 25110:2013(E)
Electronic fee collection — Interface definition for on-
board account using integrated circuit card (ICC)
1 Scope

This Technical Specification defines the data transfer models between roadside equipment (RSE) and

integrated circuit card (ICC), and the interface descriptions between RSE and on-board equipment

(OBE) for on-board account using ICC. It also provides examples of interface definitions and transactions

deployed in several countries.
This Technical Specification covers:

— data transfer models between RSE and ICC which correspond to the categorized operational

requirements, and the data transfer mechanism for each model;
— interface definition between RSE and OBE based on each data transfer model;
— interface definition for each model comprises
— functional configuration,
— RSE command definitions for ICC access, and
— data format and data element definitions of RSE commands;
— a transaction example for each model in Annex B.

Figure 3 shows the configuration of on-board account and the scope of this Technical Specification. The

descriptions in this Technical Specification focus on the interface between RSE and OBU to access ICC.

IC card I/F
DSRC
Road Side
On Board Unit
Central
Equipment
IC card
system
(OBU)
(RSE)
Generic scope of this Technical Speciication
Figure 3 — Configuration of on-board account and generic scope of ISO/TS 25110

Figure 4 shows the layer structure of RSE, OBU, and ICC where the mid-layer of application interfaces are

denoted as the practical scope of this Technical Specification.

NOTE The existing standards for physical and other protocol layers both between RSE and OBE, and between

OBE and ICC, are outside the scope of this Technical Specification. For example, DSRC related items (L-1, L-2,

and L-7) and ICC related items (ICC commands, data definition, etc.) are outside the scope of this Technical

Specification.

There are two types of virtual bridges contained in an OBU. The first type is Bridge-1 on which an RSE

command sent from RSE is decomposed and ICC access command contained in application protocol data

unit (APDU) part of RSE command is transferred to ICC I/F to access ICC. The second type is Bridge-2

on which an RSE command sent from RSU is transformed to ICC access command and transferred to ICC

I/F to access ICC.
© ISO 2013 – All rights reserved 1
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SIST-TS CEN ISO/TS 25110:2013
ISO/TS 25110:2013(E)

Bridge-1 corresponds to the transparent type and the buffering type defined in this Technical

Specification, whereas Bridge-2 corresponds to the cashing type.
OBU application
ICC
RSE
bridge -2
OS/application
application
Application interface
bridge -1
Application interface Application interface
The scope of this
Technical Speciication
DSRC DSRC ICC I/F ICC I/F
Figure 4 — Scope of ISO/TS 25110
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 14906:2011, Electronic fee collection — Application interface definition for dedicated short-range

communication

ISO 15628:2007, Road transport and traffic telematics — Dedicated short range communication (DSRC) —

DSRC application layer
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
access credentials

data that is transferred to on-board equipment (OBE), in order to establish the claimed identity of a

roadside equipment (RSE) application process entity
[ISO 14906, definition 3.1]

Note 1 to entry: The access credentials carry information needed to fulfil access conditions in order to perform

the operation on the addressed element in the OBE. The access credentials can carry passwords as well as

cryptographic based information such as authenticators.
3.2
action

function that an application process resident at the roadside equipment can invoke in order to make the

on-board equipment (OBE) execute a specific operation during the transaction
[ISO 14906, definition 3.2]
2 © ISO 2013 – All rights reserved
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ISO/TS 25110:2013(E)
3.3
attribute

application information formed by one or by a sequence of data elements, and that is managed by

different actions used for implementation of a transaction
[ISO 14906, definition 3.3]
3.4
authenticator

data appended to, or a cryptographic transformation of, a data unit that allows a recipient of the data

unit to prove the source and/or the integrity of the data unit and protect against forgery

[ISO 14906, definition 3.4]
3.5
channel
information transfer path
[ISO 7498-2:1989, definition 3.3.13; and ISO 14906, definition 3.5]
3.6
component

logical and physical entity composing an on-board equipment, supporting a specific functionality

[ISO 14906, definition 3.6]
3.7
contract

expression of an agreement between two or more parties concerning the use of the road infrastructure

[ISO 14906, definition 3.7]
3.8
cryptography

discipline which embodies principles, means, and methods for the transformation of data in order to

hide its information content, prevent its undetected modification and/or prevent its unauthorized use

[ISO 7498-2:1989, definition 3.3.20; and ISO 14906, definition 3.8]
3.9
data group

collection of closely related EFC data attributes which together describe a distinct part of an EFC transaction

[ISO 14906, definition 3.9]
3.10
data integrity

property in which data has not been altered or destroyed in an unauthorized manner

[ISO 7498-2:1989, definition 3.3.21; and ISO 14906, definition 3.10]
3.11
element
〈DSRC〉 directory containing application information in the form of attributes
[ISO 14906, definition 3.11]
3.12
issuer

entity responsible for the payment system and responsible for issuing the payment means to the user

© ISO 2013 – All rights reserved 3
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SIST-TS CEN ISO/TS 25110:2013
ISO/TS 25110:2013(E)
3.13
on-board equipment
OBE

equipment fitted within or on the outside of a vehicle and used for toll purposes

[ISO 14906, definition 3.13]
Note 1 to entry: The OBE does not need to include payment means.
3.14
on-board unit

minimum component of an on-board equipment, whose functionality always includes at least the support

of the DSRC interface
[ISO 14906, definition 3.14]
3.15
roadside equipment

equipment located along the road transport network, for the purpose of communication and data

exchanges with on-board equipment
[ISO 14906, definition 3.16]
3.16
secure application module
SAM

physically, electrically and logically protected module intended to contain algorithm(s), related keys,

security procedures and information to protect an application in such a way that unauthorized access

is not possible
[ISO/TS 17574, definition 3.22]
3.17
service
〈EFC〉 road transport related facility provided by a service provider

Note 1 to entry: Normally a type of infrastructure, the use of which is offered to the user for which the user may

be requested to pay.
Note 2 to entry: Adapted from ISO 14906.
3.18
service primitive

〈communication〉 elementary communication service provided by the application layer protocol to the

application processes
[ISO 14906, definition 3.18]

Note 1 to entry: The invocation of a service primitive by an application process implicitly calls upon and uses

services offered by the lower protocol layers.
3.19
service provider

〈EFC〉 operator that accepts the user’s payment means and in return provides a road-use service to the user

3.20
session

exchange of information and interaction occurring at a specific EFC station between the roadside

equipment and the user/vehicle
[ISO 14906, definition 3.19]
4 © ISO 2013 – All rights reserved
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SIST-TS CEN ISO/TS 25110:2013
ISO/TS 25110:2013(E)
3.21
transaction

whole of the exchange of information between the roadside equipment and the on-board equipment

necessary for the completion of an EFC operation over the DSRC
[ISO 14906, definition 3.24]
3.22
transaction model

functional model describing the general structure of electronic payment fee collection transactions

[ISO 14906, definition 3.25]
3.23
user
customer of a toll service provider

EXAMPLE One liable for toll, the owner of the vehicle, a fleet operator, a driver, etc., depending on the context.

Note 1 to entry: Adapted from ISO 14906.
3.24
transport service provider

person, company, authority or abstract entity offering a transport service to the user for which the user

has to pay a toll
Note 1 to entry: The fee will in some cases be zero, e.g. emergency vehicles.
Note 2 to entry: See ISO 17573.
© ISO 2013 – All rights reserved 5
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SIST-TS CEN ISO/TS 25110:2013
ISO/TS 25110:2013(E)
4 Abbreviations

For the purposes of this document, the following abbreviations apply throughout the document unless

otherwise specified.
AID Application Identifier
APDU Application Protocol Data Unit
ASN.1 Abstract Syntax Notation One (ISO/IEC 8824-1)
ATR Answer to Reset
ATS Answer to Select
BST Beacon Service Table
DSRC Dedicated Short-Range Communication
EAL Evaluation Assurance Level
EFC Electronic Fee Collection
EID Element Identifier
ERP Electronic Road Pricing
EVENT-RT EVENT-Report (ISO 15628)
MAC Medium Access Control
ICC Integrated Circuit(s) Card (IC Card)
IFMS Interoperable Fare Management System
OBE On-board Equipment
5 Data transfer model
5.1 Overview

There are the following three types of data transfer model for on-board account using ICC to cope with

the operational requirements described in Annex A.
5.1.1 Transparent type

The ICC command data are transferred directly from RSE to ICC through OBU. OBU stores the ICC

command data and response data in buffer memory temporarily. See Figure 5.
RSE OB U
command command
CPU
IC C
response response
Figure 5 — Generic structure of transparent type
6 © ISO 2013 – All rights reserved
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SIST-TS CEN ISO/TS 25110:2013
ISO/TS 25110:2013(E)
5.1.2 Caching type

The EFC related data are read out from ICC at the presentation, and stored in the SAM of OBU. In the

DSRC communication, the EFC related data in the SAM is transferred to RSE. See Figure 6.

RSE OB U
command
CPU SAM ICC
response
Figure 6 — Generic structure of caching type
5.1.3 Buffering type

The EFC related data which is limited to non-sensitive data are read from ICC at the presentation, and

stored in the buffer memory in the OBU. In the DSRC communication, the EFC related data in the buffer

memory is transferred to RSE. See Figure 7.
RSE OB U
command command
CPU
ICC
response response
Buffer
Memory
Figure 7 — Generic structure of buffering type
5.2 Symbols

In the data transfer mechanism of each model, the symbols given in Figure 8 are applied.

[Symbols]
DS ICC command
Data set
Debit command
Value data
Figure 8 — Definition of symbols
5.3 Transparent type
5.3.1 General description

In this model, the maximum vehicle speed depends on the data transfer rate between ICC and OBU, so

that the vehicle has to stop or go through slowly under an RSE antenna in case conventional contact ICC is

used. The feature of the transparent type is to make OBU simple by eliminating secure memory inside of

OBU, and the performance will be improved according to the developing ICC with high transfer data rate.

© ISO 2013 – All rights reserved 7
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ISO/TS 25110:2013(E)
5.3.2 Data transfer process

In this model, data exchanges between RSE and ICC are processed directly after establishing DSRC

communication and authentication between RSE and OBU is completed. Mutual authentication between

ICC and RSE is processed directly before the application data are exchanged and value data are accessed.

In the reading sequence, the READ command is sent from RSE to ICC through OBU to read out the data

set stored in ICC. In the READ response, the data set stored in ICC is transferred from ICC to RSE through

OBU. In the writing sequence, the same procedure is processed. In case of prepaid payment, the debit

command is sent from RSE and the same procedure is processed, as shown in Figure 9.

Secure DSRC
ICC
(encryption, etc)
RSE OBU ICC presentation
Initialization
authentication
Vehicle
travel
EFC
Read command
application
Read data
DS DS
Debit command and data
DC VD
Write command and data
NOTE Debit command is used in case of prepaid payment.
Figure 9 — Data transfer process of transparent type
5.4 Caching type
5.4.1 General description

In this model, OBU reads out data sets from ICC and stores them in secure memory inside OBU, upon

insertion and completion of the authentication. The feature of this type is that high data exchange rate

between RSE and OBU is performed even when ICC with slow data rate is used. With this caching type,

...

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