CEN ISO/TS 21184:2021
(Main)Cooperative intelligent transport systems (C-ITS) - Global transport data management (GTDM) framework (ISO/TS 21184:2021)
Cooperative intelligent transport systems (C-ITS) - Global transport data management (GTDM) framework (ISO/TS 21184:2021)
This document specifies a global transport data management (GTDM) framework composed of
— global transport basic data model,
— global transport access control data model,
— global transport function monitor data model, and
— sensor and control network data model
to support data exchange between applications.
This document defines standardized data classes in a Global Transport Data Format (GTDF), and the means to manage them.
Application and role-based access control to resources in GTDF are specified in accordance with IEEE 1609.2 certificates.
This document specifies GTDM as an ITS-S capability which is an optional feature (ITS-capabilities are specified in ISO 24102-6).
The GT access control (GTAC) data model specifies access permissions to data and function control by defining role-based mechanisms.
The GT function monitor (GTFM) data model specifies a configuration method to generate a flow logic for monitoring purposes, e.g. observing data parameters with respect of a defined limit.
Kooperative Intelligente Verkehrssysteme (C-ITS) - Globales Verkehrsdatenmanagement (GTDM) Rahmenwerk (ISO/TS 21184:2021)
Systèmes de transport intelligents coopératifs (C-ITS) - Cadre de gestion globale des données de transport (GTDM) (ISO/TS 21184:2021)
Kooperativni inteligentni transportni sistemi (C-ITS) - Okvir globalnega upravljanja podatkov o prometu (GTDM) (ISO/TS 21184:2021)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2021
Kooperativni inteligentni transportni sistemi (C-ITS) - Okvir globalnega upravljanja
podatkov o prometu (GTDM) (ISO/TS 21184:2021)
Cooperative intelligent transport systems (C-ITS) - Global transport data management
(GTDM) framework (ISO/TS 21184:2021)
Intelligente Transportsysteme - Sichere Fahrzeugschnittstelle - Datenverzeichnis für C-
ITS anwendungsrelevante Fahrzeuginformationen (ISO/TS 21184:2021)
Systèmes de transport intelligents - Interface véhicule sécurisée - Dictionnaire de
données des informations embarquées pour applications C-ITS (ISO/TS 21184:2021)
Ta slovenski standard je istoveten z: CEN ISO/TS 21184:2021
ICS:
03.220.01 Transport na splošno Transport in general
35.240.60 Uporabniške rešitve IT v IT applications in transport
prometu
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CEN ISO/TS 21184
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
March 2021
TECHNISCHE SPEZIFIKATION
ICS 03.220.01; 35.240.60
English Version
Cooperative intelligent transport systems (C-ITS) - Global
transport data management (GTDM) framework (ISO/TS
21184:2021)
Systèmes de transport intelligents coopératifs (C-ITS) - Intelligente Transportsysteme - Sichere
Cadre de gestion globale des données de transport Fahrzeugschnittstelle - Datenverzeichnis für C-ITS
(GTDM) (ISO/TS 21184:2021) anwendungsrelevante Fahrzeuginformationen (ISO/TS
21184:2021)
This Technical Specification (CEN/TS) was approved by CEN on 12 December 2020 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TS 21184:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (CEN ISO/TS 21184:2021) has been prepared by Technical Committee ISO/TC 204
"Intelligent transport systems" in collaboration with Technical Committee CEN/TC 278 “Intelligent
transport systems” 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 shall not be held responsible for identifying any or all such patent rights.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO/TS 21184:2021 has been approved by CEN as CEN ISO/TS 21184:2021 without any
modification.
TECHNICAL ISO/TS
SPECIFICATION 21184
First edition
2021-03
Cooperative intelligent transport
systems (C-ITS) — Global transport
data management (GTDM) framework
Systèmes de transport intelligents coopératifs (C-ITS) - Cadre de
gestion globale des données de transport (GTDM)
Reference number
ISO/TS 21184:2021(E)
©
ISO 2021
ISO/TS 21184:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
ISO/TS 21184:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 3
5 Conventions . 5
6 Global Transport Data Management (GTDM) framework . 5
6.1 General . 5
6.2 Applicable use case groups . 7
6.2.1 General. 7
6.2.2 GTDM framework operation . 8
6.2.3 GTDM certificate-based access control . 9
6.2.4 Proximity use case applications .10
6.2.5 On-board use case applications .11
6.2.6 Remote use case (ITS, product-related) applications .12
6.2.7 Common configuration data authoring process .13
6.3 GTDM Basic principles .14
7 ITS-S global transport data model .15
7.1 Overview .15
7.2 GT basic data model.15
7.2.1 Overview .15
7.2.2 GT basic configuration .16
7.2.3 GT language package .36
7.2.4 GT runtime data .37
7.2.5 GT condition.44
7.3 GT access control data model .48
7.3.1 GTACProtocolConfig .48
7.3.2 ACProtocol . .48
7.3.3 ACProtocolService .49
7.3.4 ACProtocolRole .49
7.3.5 GTACPermissionConfig .49
7.3.6 ACEcuDataParamAccessSet .50
7.3.7 ACEcuDataParamAccess .50
7.3.8 ACAccessDetail .51
7.4 GT function monitor data model .51
7.4.1 GTFMConfig . .51
7.4.2 FMBrick .53
7.4.3 FMDataParamCopy .56
7.4.4 FMMessageSequence .56
7.5 SCN data model (optional) .57
7.5.1 SCNDFConfig .57
7.5.2 ProtocolType .60
7.5.3 DlcPin .61
7.5.4 ProtocolAddressing .62
7.5.5 EcuAddress .62
7.5.6 PhysicalEcuAddress .63
7.5.7 ProtocolService .63
7.5.8 ProtocolResponseMessage . .64
7.5.9 PackageScheduler .64
7.5.10 PackageSource .65
7.5.11 PackageMapping .65
ISO/TS 21184:2021(E)
7.5.12 DtcScheduler .66
7.5.13 CompuMethod .67
7.5.14 CompuScale .69
7.5.15 CompuLimit .69
7.5.16 CompuItem .70
7.5.17 CompuRational .70
7.5.18 CompuTextToValue .70
7.5.19 ExceptionRule .71
7.5.20 ExceptionRuleElement .71
8 ITS-S global transport data management .72
8.1 General .72
8.2 ITS-S Management .73
8.2.1 Configuration Provider (M1) .73
8.2.2 Startup sequence .74
8.3 ITS-S Security .75
8.3.1 General.75
8.3.2 ITS application identifier (ITS-AID) .76
8.3.3 Certificates and keys for use with ISO/TS 21177 secure sessions .76
8.3.4 Access control (S1).77
8.3.5 Security sub-layer (S2) .78
8.4 ITS-S Facilities .78
8.4.1 Data Provider (F1) . . .78
8.4.2 SCN Handler (F2).82
8.4.3 GTP Handler (F3) .84
8.4.4 Function Monitor (F4) .89
8.5 ITS-S Network layer and Transport layer .91
8.5.1 ITS Network Handler (N1) .91
8.5.2 SC Network Handler (N2) .92
8.6 ITS-S Applications .92
8.6.1 Application (A1) .92
9 Service Access Points (SAP) .93
9.1 General .93
9.2 SAP – Management to Application .93
9.3 SAP – Management to Security .93
9.4 SAP – Management to Facilities .94
9.5 SAP – Management to Network .94
9.6 SAP – Security to Facilities .94
9.7 SAP – Security to Network .95
9.8 SAP – Network to Facilities .95
10 ASN.1 definition .96
Annex A (normative) Global Transport ASN.1 definition .97
Bibliography .115
iv © ISO 2021 – All rights reserved
ISO/TS 21184:2021(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.
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 of 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 www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC
278, Intelligent transport systems, in accordance with the Agreement on technical cooperation between
ISO and CEN (Vienna Agreement).
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.
ISO/TS 21184:2021(E)
Introduction
This document is part of a family of deliverables from Standard Development Organizations (SDOs)
for Cooperative Intelligent Transport Systems (C-ITS), which is a subset of standards for Intelligent
Transport Systems (ITS).
ITS aims to improve surface transportation in terms of:
— safety
e.g. crash avoidance, obstacle detection, emergency calls, dangerous goods;
— efficiency
e.g. navigation, green wave, priority, lane access control, contextual speed limits, car sharing;
— comfort
e.g. telematics, parking, electric vehicle charging, infotainment; and
— sustainability,
by applying information and communication technologies (ICT).
The whole set of standards for deployment of C-ITS is difficult to understand for developers of
equipment and software, especially ITS application software, and thus guidelines explaining a beneficial
choice of standards (C-ITS release), the purpose and interaction of standardized features, beneficial
implementation approaches, and guidance in developing ITS applications are a prerequisite for a fair and
open market allowing early deployment of interoperable and future-proof solutions; see ISO/TR 21186-1.
[14]
More details on the C-ITS domain can be found in the Brochure produced by CEN/TC 278.
Referencing other SDOs and their respective deliverables is in no way to be understood as an
endorsement, but rather as an informative piece of information.
At the time of writing this document, no applicable Intellectual Property Rights (IPR) issues were
known related to this document. However, this document references standards for which IPRs are
known. Information on such IPRs is expected to be provided in those respective standards, which might
be from any one of the SDOs working on ITS or C-ITS.
vi © ISO 2021 – All rights reserved
TECHNICAL SPECIFICATION ISO/TS 21184:2021(E)
Cooperative intelligent transport systems (C-ITS) — Global
transport data management (GTDM) framework
1 Scope
This document specifies a global transport data management (GTDM) framework composed of
— global transport basic data model,
— global transport access control data model,
— global transport function monitor data model, and
— sensor and control network data model
to support data exchange between applications.
This document defines standardized data classes in a Global Transport Data Format (GTDF), and the
means to manage them.
Application and role-based access control to resources in GTDF are specified in accordance with
IEEE 1609.2 certificates.
This document specifies GTDM as an ITS-S capability which is an optional feature (ITS-capabilities are
specified in ISO 24102-6).
The GT access control (GTAC) data model specifies access permissions to data and function control by
defining role-based mechanisms.
The GT function monitor (GTFM) data model specifies a configuration method to generate a flow logic
for monitoring purposes, e.g. observing data parameters with respect of a defined limit.
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 8824-1, Information technology — Abstract Syntax Notation One (ASN.1): Specification of basic
notation — Part 1:
ISO/IEC 8825-7, Information technology — ASN.1 encoding rules — Part 7: Specification of Octet Encoding
Rules (OER)
ISO 14229-1, Road vehicles — Unified diagnostic services (UDS) — Part 1: Application layer
ISO/TS 17429, Intelligent transport systems — Cooperative ITS — ITS station facilities for the transfer of
information between ITS stations
ISO/TS 21177, Intelligent transport systems — ITS station security services for secure session establishment
and authentication between trusted devices
ISO 21217, Intelligent transport systems — Communications access for land mobiles (CALM) — Architecture
ISO 22900-2, Road vehicles — Modular vehicle communication interface (MVCI) — Part 2: Diagnostic
protocol data unit (D-PDU API)
ISO/TS 21184:2021(E)
ISO 24102-6, Intelligent transport systems — Communications access for land mobiles (CALM) — ITS
station management — Part 6: Path and flow management
CEN/TS 17496, Cooperative intelligent transport systems — Communication profiles
IEEE 1609.2, IEEE Standard for Wireless Access in Vehicular Environments — Security Services for
Applications and Management Messages
RFC 5646, Tags for Identifying Languages
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/TS 21177, CEN/TS 17496,
ISO 21217 and the following 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
class
an extensible programme-code-template for creating objects, providing initial values for state (member
variables) and implementations of behaviour (member functions or methods) in object-oriented
programming
3.2
convention
Cvt
indicates if specification is "M" (mandatory), "O" (optional), or "C" (conditional)
3.3
global transport protocol client
GTP client
entity that instigates the provision of the GTP service
3.4
global transport protocol server
GTP server
entity that provides the GTP service
3.5
raw data
data of a sensor control network (SCN) in the untreated format as specified by the SCN owner
3.6
raw data source identifier
unique identifier of an entity in an SCN (3.9)
3.7
retrofit
addition of new technology or features to existing systems
3.8
secure data interface
SDI
gateway providing bidirectional means for security and access control
2 © ISO 2021 – All rights reserved
ISO/TS 21184:2021(E)
3.9
sensor control network
SCN
communication bus with measured inputs and controlled outputs
4 Abbreviated terms
ADU application data unit
AMQP advanced message queuing protocol
ASN.1 abstract syntax notation one
BP basic principle
CAN controller area network
cId common identifier
C-ITS-SU central ITS station unit
C-ITS-S central ITS station
CUP CAN utility protocol
Cvt convention
dId data identifier
D-PDU diagnostic protocol data unit
dpId data parameter identifier
DTC diagnostic trouble code
eCall emergency call
ECU electronic control unit
ecuId electronic control unit identifier
enh-diag enhanced diagnostic
FSH facilities service handler
GNSS global navigation satellite system
GPIO general purpose input/output
GT global transport
GTAC global transport access control
GTBasic global transport basic
GTDF global transport data format
GTDM global transport data management
GTDF2SCNPDU global transport data format to sensor control network protocol data unit
ISO/TS 21184:2021(E)
GTFM global transport function monitor
GTP global transport protocol
i internal
IEEE Institute of Electrical and Electronics Engineers
IMU inertial measurement unit
IP internet protocol
IPR intellectual property rights
itid info type identifier
ITS-AID ITS application identifier
ITS-SU ITS station unit
IVN in-vehicle network
K-line communication line
KWP2000 Keyword Protocol 2000
lid local identifier
LDM local dynamic map
LSb least significant bit
LSB least significant byte
MIL malfunction indicator light
MQTT message queuing telemetry transport
MVCI modular vehicle communication interface
OBD on-board diagnostics
odt object description table
OTL on-board diagnostic threshold limits
PDU protocol data unit
pgn parameter group number
pid parameter identifier
ProtBuf protocol buffers
P-ITS-S personal ITS-station
P-ITS-SU personal ITS-station unit
PSID provider service identifier
r read
4 © ISO 2021 – All rights reserved
ISO/TS 21184:2021(E)
rid routine identifier
R-ITS-S roadside ITS-station
R-ITS-SU roadside ITS-station unit
SAP service access point
SCNDF sensor and control network data format
SCNPDU2GTDF sensor and control network protocol data unit to global transport data format
snsid sensor identifier
SNI secure network interface
spn suspect parameter number
SPaT signal phase and timing
SSP service specific permission
tid test identifier
TLS transport layer security
u user optional
UDS unified diagnostic services
UGP unified gateway protocol
VIS vehicle information service
V-ITS-S vehicle ITS-station
V-ITS-SU vehicle ITS-station unit
w write
W3C world wide web
WWH-OBD world wide harmonized on-board-diagnostic
x execute
XCP universal measurement and calibration protocol
xml extensible markup language
5 Conventions
This document conforms to the OSI Service Conventions specified in ISO/IEC 10731.
6 Global Transport Data Management (GTDM) framework
6.1 General
The data flow from sensor and control networks (e.g., in-vehicle networks, roadside station unit
networks) to a data server, which functions as a data publisher, is illustrated in Figure 1. The technical
ISO/TS 21184:2021(E)
solution specified in this document addresses the complexity of converting protocol data units (PDUs)
with raw (device-specific) data of any sensor and control network, of any kind of technical equipment, as
part of the ITS eco-system into a standardized data format, called global transport data format (GTDF).
The state-of-the-art conversion of sensor and control network raw data is an implementation of
conversion routines hard-coded in software in a gateway/an electronic control unit (ECU). The
gateway/ECU provides the PDUs upon request/response scheme to a client.
The global transport data framework (GTDM) fulfills the function of data conversion of sensor and
control network raw data in a flexible way, using configuration data specific for the sensor and control
network connected to. The advantage of the configuration concept is the flexibility to use the same
implementation architecture for different sensor and control networks.
Key
1 sensor and control network #1 to #s protocol data units
2 sensor and control network PDUs converted into GTDF data
3 GTDF data provider containing all data parameter values specified in the configuration(s)
4 GTDF data broker performs event-based transfer of instant updates or historically measured data according
to subscription(s)
5 clients (GTDF data subscribers) subscribe to data parameters based on the implementation of use cases
a
Sensor and control network protocol data units, containing raw signals in raw data format, forwarded to the
SCNDF to GTDF data converter.
b
GTDF data parameter values forwarded to the GTDF data provider.
c
GTDF data provider provides data parameter values to the GTDF data broker for publishing to
subscriber(#1 to #x).
d
The GTDF data broker publishes data parameter values based on subscription by clients.
Figure 1 — Data flow from SCN data format to global transport data format
Figure 2 depicts the overall GTDM framework. Use cases are to be defined by stakeholders to identify
the objectives, actors, input data and output data to achieve their objectives. Once the use cases are
defined, the use case information is converted into requirement statements. Such requirements are
implemented in use case-specific applications. The use case input and output information are converted
into data parameters compatible to the GTDF specified in this document. GTDF defined data are based
on data types specified in this document. One or more configurations are created based on use cases
definitions. Applications can share their data in the same data format (GTDF). GTDF configurations are
the data necessary to interpret data exchange between entities. The data flow is determined by the
GTDF configurations.
NOTE Use cases and stakeholder task definitions are not within the scope of this document.
6 © ISO 2021 – All rights reserved
ISO/TS 21184:2021(E)
Figure 2 — GTDM framework
6.2 Applicable use case groups
6.2.1 General
The use case groups (Proximity, On-Board, Remote) illustrated in Figure 3 are candidates for
diagnostics inspection and maintenance, on-board applications, remote ITS applications and remote
ITS applications and neutral backend server(s) applications, which utilize the GTDM framework (this
document) implemented on a secure network interface (SNI). The secure communication interface
software implements at least the requirements stated in the following documents:
— ISO/TS 21177;
— ISO/TS 21184 (this document); and
ISO/TS 21184:2021(E)
— ISO/TS 21185.
SNI implementations utilize the GTDM framework in combination with ISO 22900-2 D-PDU, the
diagnostic protocol data unit, to interface to the SCN
Key
1 central station unit (C-ITS-SU) e.g. traffic management system backoffice server specific sensor and
control network
2 roadside station unit (R-ITS-SU) specific sensor and control network
3 on-board unit (V-ITS-SU) specific sensor and control network
4 personal (smartphone) station unit (P-ITS-SU) specific sensor and control network
a
IEEE 1609.2 certificate with Provider Service Identifier (PSID) and Service-Specific Permission (SSP) identifier.
b
Digital signature for verifying the authenticity of digital configuration documents.
c
Integrated firewall based on GTDF and SCNDF configuration file information.
Figure 3 — Application use cases and sensor and control networks
R-ITS-SU, V-ITS-SU, P-ITS-SU and C-ITS-SU products, implemented in accordance with the documents
specified in Clause 2, are applicable for new designed products and retrofits.
The various use case-based applications illustrated are described in 6.2.4 to 6.2.6 and based on access
to SCN examples. The same or similar use cases apply to R-ITS-SUs, for example.
6.2.2 GTDM framework operation
At startup, the GTDM framework software loads the GTDF configurations and optionally SCNDF
configurations. Based on the content of the configurations, the software starts the communication
with the SCN(s) and accesses raw information as specified in the SCNDF configurations. Once the
protocol data units (PDUs) are available, the relevant information converted into the global transport
data format (GTDF). Conversion information is contained in the SCNDF configuration. The timing of
accessing raw data on the SCN(s) is defined in the scheduler as part of the SCNDF configuration. Various
access methods (e.g. on event, periodic, request and response scheme) are available on how to access
the data on the SCN(s). Each data item is assigned a raw data source identifier corresponding to its
source function or physical unit, and a data parameter identifier. The combination of both identifiers
makes it a unique identifier for a newly created or updated data item in the GTDM framework.
8 © ISO 2021 – All rights reserved
ISO/TS 21184:2021(E)
All data items (ECU data parameters) in GTDF are time stamped at the time of raw data reception.
After conversion of the data from the raw data format to the standardized format, the information is
forwarded to the GTDM Data Provider, which also supports a GTDM data broker function. The global
transport protocol (GTP) services specified in this document are used to access and control data items.
The GTP services provide a superset of functionality of the most common protocols (e.g. ISO 13185-2
[2] [4][15] [11] [12] [13)]
UGP , ISO/IEC 19464 AMQP , MQTT , ProtBuf , W3C VIS used in the industry. A protocol
service mapping and a data format converter needs to be installed for each protocol to interface with
the GTP services.
6.2.3 GTDM certificate-based access control
The access control specified in this document is dedicated to the GTP services (see 8.4.3.2) and
individual ECU data parameter depending on the content of the IEEE 1609.2 compatible certificates.
The certificate contains a Provider Service Identifier (PSID) which is the equivalent of an ITS
Application Identifier (ITS-AID), see 8.3.2. The certificate also includes a BitmapSsp (Bitmap Service-
Specific Permission) structure, see 8.3.3. Figure 27 illustrates an example of a BitmapSsp including a
role identifier. Examples of role are: predicitve maintenance, read-only vehicle diagnostics, enhanced
vehicle diagnostics and station software update. A prerequisite of a client application accessing data
and controlling functions of a station as shown in Figure 3 (R-ITS-SU, V-ITS-SU, P-ITS-SU, C-ITS-SU)
requires an ITS-AID (PSID) and a BitmapSsp with an appropriate role identifier, which is compatible
with the ITS-AID.
This example describes a diagnostic application (ITS-AID) which is limited to "predictive maintenance"
(BitmapSsp: role = predictive maintenance) and therefore is not authorized to clear diagnostic trouble
code information.
Table 1 describes an example of access control applied to GTP services and EcuDataParams.
Table 1 — Example of access control applied to GTP services and EcuDataParams
GTP service EcuDataParam BitmapSsp (role id)
a b c
1 2 3
d d d
GetSupportedInfo( provides a list of all supported combinations of ECU and data X X X
EcuDataParams) parameter: e.g., ECM.Calculated LOAD Value, ECM.Engine
RPM, TCM.Vehicle Speed Sensor, ECM.Engine Idle Speed;
e e e
GetSupportedInfo(DTCs) provides a list of all supported DTCs by the SNI or a specific --- --- ---
ECU connected to the SCN;
e e e
GetSupportedInfo( provides a list of all supported messages by the SNI: e.g., --- --- ---
Messages) eCall Minimum Set of Data;
d d e
SubscribeValues ECM.Calculated LOAD Value X X ---
d d e
ECM.Engine RPM X X ---
d d e
TCM.Vehicle Speed Sensor X X ---
d d e
PublishValues ECM.Calculated LOAD Value X X ---
d d e
ECM.Engine RPM X X ---
d d e
TCM.Vehicle Speed Sensor X X ---
e d e
SetValues ECM.Engine Idle Speed --- X ---
e d e
ControlValues ECM.Engine RPM --- X ---
e e e
SubscribeMessages e.g. server application subscribes to eCall Minimum Set of --- --- ---
Data message
a
Predictive maintenance application.
b
Enhanced vehicle diagnostics.
c
Station software update.
d
Cell selected/feature defined.
e
Empty cell/feature not selected.
...
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