SIST-TS CEN/TS 17496:2021

SLOVENSKI STANDARD
SIST-TS CEN/TS 17496:2021
01-maj-2021
Kooperativni inteligentni transportni sistemi - Komunikacijski profili
Cooperative intelligent transport systems - Communication profiles
Intelligente Verkehrssysteme - Kommunikationsprofile für eine sichere Verbindung
zwischen zuverlässigen Geräten
Systèmes intelligents de transport - Interface véhicule sécurisée - Profils de
communication pour connexion sécurisée entre une station ITS et un véhicule
Ta slovenski standard je istoveten z: CEN/TS 17496:2021
ICS:
35.240.60 Uporabniške rešitve IT v IT applications in transport
prometu
SIST-TS CEN/TS 17496:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CEN/TS 17496:2021


CEN/TS 17496
TECHNICAL SPECIFICATION

SPÉCIFICATION TECHNIQUE

February 2021
TECHNISCHE SPEZIFIKATION
ICS 35.240.60
English Version

Cooperative intelligent transport systems -
Communication profiles
Systèmes intelligents de transport - Profils de Kooperative intelligent Verkehrssysteme -
communication Kommunikationsprofile
This Technical Specification (CEN/TS) was approved by CEN on 30 November 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/TS 17496:2021 E
worldwide for CEN national Members.

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Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Symbols and abbreviations . 7
5 Object identifiers . 8
6 Architecture . 8
7 Communication profiles and protocol stacks - overview . 9
7.1 Definitions and methodology . 9
7.2 Contexts . 10
7.2.1 ITS-SCPs related to communications between ITS-SCUs . 10
7.2.2 ITS-SCPs related communications between ITS-SUs . 10
7.2.3 ITS-SCPs related to SCNs . 10
8 ITS communication protocols . 11
8.1 ITS-CP identifiers . 11
8.2 Initially identified ITS-SCPs . 11
8.2.1 ITS-S access layer . 11
8.2.2 ITS-S networking and transport layer . 13
8.2.3 ITS-S facilities layer . 14
8.2.4 ITS-S security entity . 16
8.2.5 ITS-S management entity . 16
8.2.6 Combinations of ITS-S layers and entities . 16
9 ITS-S communication protocol stacks . 17
9.1 ITS-SCPS identifiers . 17
9.2 Initially identified ITS-SCPSs. 17
9.2.1 ITS-SCPS for “ITS station-internal management communications” . 17
9.2.2 ITS_SCPS for “SCN-access”. 17
9.2.3 ITS-SCPS for “M5 service announcement” . 19
9.2.4 ITS-SCPS for “Secure sessions involving Internet “ . 20
9.2.5 ITS-SCPS for “Secure broadcast of messages with the ETSI ITS-G5 Release 1 stack” . 21
9.2.6 ITS-SCPS for ” IPv6 localized communications” . 22
10 ITS-S communication profiles . 22
10.1 ITS-SCP identifiers . 22
10.2 Initially identified ITS-SCPs . 23
10.2.1 ITS station-internal management communications . 23
10.2.2 Access to an SCN for diagnostics purposes . 24
10.2.3 Service announcement . 25
10.2.4 General secure sessions involving Internet . 26
10.2.5 Secure broadcast of ETSI road safety messages with the ITS-G5 Release 1 stack . 27
Annex A (normative) ASN.1 module . 28
A.1 Overview . 28
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A.2 Module SISNprofiles . 28
Bibliography . 34

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European foreword
This document (CEN/TS 17496:2021) has been prepared by 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.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
According to the CEN/CENELEC Internal Regulations, the national standards organisations 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.
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Introduction
ITS Station Communication Profiles, see EN ISO 17423 and EN ISO 17419, used for communications
between (trusted) devices simplify achieving
— interoperability between ITS station units,
— and portability of ITS applications (that provide the ITS services).
Examples of trusted devices, i.e. ITS-secured communication nodes, are ITS-station units specified in
[32]
ISO 21217, which fully covers ETSI EN 302 665 . Four implementation contexts of communication
nodes in ITS communications networks are identified in ISO 21217, each comprised of ITS-station units
taking on a particular role; personal, vehicular, roadside, or central. Such ITS station units participate in
a wide variety of ITS services related to e.g. sustainability, road safety and transportation efficiency.
An ITS station unit can be composed of ITS station communication units from different vendors where
each ITS station communication unit is linked to a different configuration and management centre
[21]
specified in ISO 24102-2 and EN ISO 17419. Station-internal management communications between
[22]
ITS station communication units of the same ITS station unit is specified in ISO 24102-4 .
The identification of ITS station communication profiles specified in this document is generically
applicable to all kind of communications including broadcast information dissemination and sessions,
e.g. sessions between ITS station units, sessions between ITS station communication units of the same
ITS station unit, sessions between roadside ITS station units and a cloud platform, and between vehicle
ITS station units and a cloud platform, including communications sessions compatible with extended
[12]
vehicles standards developed by ISO TC 22 (ISO 20077 series ).
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1 Scope
This document specifies a methodology to define ITS-S communication profiles (ITS-SCPs) based on
standardized communication protocols to interconnect trusted devices. These profiles enable secure
information exchange between such trusted devices, including secure low-latency information exchange,
in different configurations. The present document, in order to exemplify the methodology, also
normatively specifies some ITS-SCPs based on the methodology, yet without the intent of covering all
possible cases. Further ITS-SCPs can be specified at a later stage.
Configurations of trusted devices for which this document defines ITS-SCP’s include:
a) ITS station communication units (ITS-SCU) of the same ITS station unit (ITS-SU), i.e. station-internal
communications;
b) an ITS-SU and an external entity such as a sensor and control network (SCN), or a service in the
Internet;
c) ITS-SUs.
The specifications given in this document can be equally applied to secured and unsecured
communications, being groupcast and unicast communications, being localized or networked
communications.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN ISO 17419, Intelligent transport systems — Cooperative systems — Globally unique identification
(ISO 17419)
EN ISO 17423, Intelligent transport systems — Cooperative systems — Application requirements and
objectives (ISO 17423)
ISO 21217, Intelligent transport systems — Station and communication architecture
ISO/IEC 8825-1, Information technology — ASN.1 encoding rules: Specification of Basic Encoding Rules
(BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) — Part 1:
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3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 17419, EN ISO 17423,
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
ITS-S communication profile
parameterized ITS-S communication protocol stack
[SOURCE: EN ISO 17423:2018, definition 3.6]
3.2
ITS communication protocol
communication protocol applicable in ITS
3.3
ITS-S communication protocol stack
consistent set of ITS-S communication protocols enabling communications between an ITS-SCU and other
nodes which may be identified by a registered globally unique reference number
[SOURCE: EN ISO 17423:2018, definition 3.7]
4 Symbols and abbreviations
CSP communication service parameter
[SOURCE: EN ISO 17423]
ITS-CP ITS communication protocol
ITS-SCP ITS station communication profile
[SOURCE: EN ISO 17423]
ITS-SCPS ITS station communication protocol stack
[SOURCE: EN ISO 17423]
ITS-SCU ITS station communication unit
[SOURCE: ISO 21217]
ITS-SU ITS station unit
[SOURCE: ISO 21217]
IRN infrastructure/roadside network
IVN in-vehicle network
SCN sensor and control network
SSTD secure session between trusted devices
OID object identifier
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5 Object identifiers
The following OIDs are used in this document and shall be as specified below:
1) Identifying this document:
{ iso(1) identified-organization(3) cen(162) cp17496 (17496) }
2) Identifying ASN.1 module specifications of this document
{ iso(1) identified-organization(3) cen(162) cp17496 (17496) asn1 (1) }
3) Identifying an ITS communications protocol:
{ iso(1) identified-organization(3) cen(162) cp17496 (17496) commProtocol (2) }
4) Identifying an ITS-S communication protocol stack (ITS-SCPS)
{ iso(1) identified-organization(3) cen(162) cp17496 (17496) its-scps (3) }
5) Identifying an ITS-S communications profile (ITS-SCP)
{ iso(1) identified-organization(3) cen(162) cp17496 (17496) its-scp (4) }
6 Architecture
This document considers the ITS station and communication architecture specified in ISO 21217, and
specifies globally unique identifiers of ITS-S communication profiles (ITS-SCPs), e.g.:
— interconnecting ITS-SCUs in an ITS-SU,
— interconnecting ITS-SUs, and for,
— interconnecting an ITS-SU with a SCN,
using OIDs identifying
— ITS communication protocols,
— ITS-S communication protocol stacks (ITS-SCPS),
— ITS-S communication profiles (ITS-SCP),
also specified in this document. The approach is based on the methodology for protocol parameters
CSP_Protocol and CSP_SpecificCommsProts specified in EN ISO 17423 and illustrated in 7.1.
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7 Communication profiles and protocol stacks - overview
7.1 Definitions and methodology
An ITS-SCP is defined in EN ISO 17423 as a “parameterized ITS-S communication protocol stack”.
EN ISO 17423 further specifies how ITS-S application processes can present their communication needs
by means of “Communication Service Parameters” (CSP) to the ITS-S management, and how the ITS-S
management selects applicable ITS-S communication profiles. This document uses the following two
CSPs for specifying ITS-SCPs:
a) CSP_Protocol:
Identification of a complete non-parameterized communication protocol stack by means of a globally
unique registered communication protocol stack identifier of ASN.1 type
ProtocolReq:: = ITSprotocolStackID, with ITSprotocolStackID specified in
EN ISO 17419.
NOTE 1 EN 17419 specifies ITSprotocolStackID as an INTEGER.
b) CSP_SpecificCommsProts:
Identification of selected non-parameterized communications protocol stack elements by means of
a sequence of protocol identifiers of ASN.1 type SpecCommProts:: = SEQUENCE OF ITSprotID,
with ITSprotID specified in EN 17419 as a sequence of a ITS-S protocol location of ASN.1 type
ItssProtocolLocation followed by an ITS protocol identifier of ASN.1 type
ItsProtocolIdentifier; see Table 1 and Clause 8.
NOTE 2 EN ISO 17419 specifies ItsProtocolIdentifier as an INTEGER.
Table 1 — Named Integer values of ItsProtocolLocation as specified in EN ISO 17419
a
ITS-S layer or entity (ISO 21217:2014)
ItsProtocolLocation
Acronym Value
ITS-S access layer “acLayer” 1
ITS-S networking and transport layer “ntLayer” 2
ITS-S facilities layer “fcLayer” 4
ITS-S management entity “mgEntity” 8
ITS-S security entity “scEntity” 16
other location “other” 32
a
For ITS protocols residing in more than one layer or entity, the acronym to be used in the context of this
document is “several” with a value given by the sum of the values of the respective layers and entities.
Alternatively, the parts of such an ITS protocol may be identified separately.
The methodology for specifying ITS-SCPs in this document is given by the following steps:
1) Identify ITS communication protocols (ITS-CPs) by means of an OID reference to the standard or
specification of the protocol based on the methodology for CSP_SpecificCommsProts specified in
EN ISO 17423; see 8.1.
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2) Identify ITS-SCPSs by means of an OID reference to a set of ITS-CPs based on the methodology for
CSP_Protocol specified in EN ISO 17423; see 9.1.
3) Identify ITS-SCPs by means of an OID reference to an ITS-SCPS and parameterization information,
see 10.1.
7.2 Contexts
7.2.1 ITS-SCPs related to communications between ITS-SCUs
An example of an ITS-SCP for the links between ITS-SCUs of the same ITS-SU, see Figure 1, is presented
in 10.2.1.

Figure 1 — Interconnection of ITS-SCUs in an ITS-SU
7.2.2 ITS-SCPs related communications between ITS-SUs
An example of an ITS-SCP for the link between ITS-SUs, see Figure 2, is presented in 10.2.3

Figure 2 — Interconnection of ITS-SUs
7.2.3 ITS-SCPs related to SCNs
An example of an ITS-SCP for the link between ITS-SUs (ITS-SCUs) and the interface towards sensor and
control networks, see Figure 3, is presented in 10.2.2.
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Figure 3 — Interface between ITS-SU and sensor and control network
While the “Interface” in Figure 3 has to be ITS trusted and secured, the SCN may be ITS trusted and
secured or not. This document only considers the communications link between the ITS-SU and the ITS-
[13]
secured “Interface”. Details on security are specified in ISO 21177 .
8 ITS communication protocols
8.1 ITS-CP identifiers
ITS-CPs are identified by an “ITS protocol identifier” of type OID, see 7.1, pointing to a standard or
specification. Subclauses 8.2.1, 8.2.2, 8.2.3, 8.2.4, and 8.2.5 specify the OID value of ITS-CPs in the ITS-S
access layer, ITS-S networking and transport layer, ITS-S facilities layer, ITS-S security entity, and ITS-S
management entity, respectively; these layers and entities are specified in ISO 21217.
The “ITS-CP identifier” OID values specified in Tables 2, 3, 4, and 5 identify communication protocol stack
elements for the purpose of this document. Combinations of such protocols, i.e. ITS communication
protocol stacks, are specified in Clause 9.
Requirement 1: The generation of an OID for identifying an ITS-CP shall follow the following structure:
— {iso(1) identified-organization(3) cen(162) cp17496 (17496) commProtocol (2)
(itssProtocolLocation) itsProtocolIdentifier-'n' ('n')}
with
— and itssProtocolLocation as specified in Table 1;
— itsProtocolIdentifier-'n': 'n': equals ItsProtocolIdentifier with values assigned in this
document.
8.2 Initially identified ITS-SCPs
8.2.1 ITS-S access layer
Table 2 presents ITS protocol identifiers of ITS-CPs residing in the ITS-S access layer.
NOTE 1 The ITS-S access layer covers the OSI layers one and two; see ISO 21217.
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Table 2 — Communication protocol stack elements — ITS-S access layer
Standard reference ITS communication protocol Comment
identifier
none {iso(1) identified-organization(3) Networked communications, i.e.
cen(162) cp17496 (17496) general access to the Internet.
commProtocol (2) acLayer (1)
This standard reference is used in the
a
itsProtocolIdentifier-1 (1)}
general meaning of “any access
technology providing access to
Internet”.
An example of a cellular access
technology is specified in ISO 17515-1
[9]
.
[16]
{iso(1) identified-organization(3) Localized communications using
ISO 21214
cen(162) cp17496 (17496) infrared light.
commProtocol (2) acLayer (1)
itsProtocolIdentifier-2 (2)}
[17]
{iso(1) identified-organization(3) Localized communications using
ISO 21215
cen(162) cp17496 (17496) microwaves. This can be either
commProtocol (2) acLayer (1) ordinary WiFi mode or OCB mode in
itsProtocolIdentifier-3 (3)} different frequency bands.
[18]
{iso(1) identified-organization(3) Common adaptation layer towards the
ISO 21218
cen(162) cp17496 (17496) ITS-S networking and transport layer
commProtocol (2) acLayer (1)
itsProtocolIdentifier-4 (4)}
[25]
{iso(1) identified-organization(3) Wired Ethernet communications.
IEEE Std. 802.3™
cen(162) cp17496 (17496)
commProtocol (2) acLayer (1)
itsProtocolIdentifier-5 (5)}
[2]
{iso(1) identified-organization(3) DoIP — Wired interface based on
ISO 13400-3
[25]
cen(162) cp17496 (17496)
IEEE Std. 802.3™ .
commProtocol (2) acLayer (1)
itsProtocolIdentifier-6 (6)}
[31]
{iso(1) identified-organization(3) Localized communications using
ETSI EN 302 663
cen(162) cp17496 (17496) microwaves at 5,9 GHz in OCB mode
commProtocol (2) acLayer (1) with LPD.
itsProtocolIdentifier-7 (7)}
a
This OID is used in ISO/TS 21185 to indicate Internet access with LTE.
NOTE 2 Further standard references can be identified and linked to an ITS protocol identifier at a later stage.
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8.2.2 ITS-S networking and transport layer
Table 3 presents ITS protocol identifiers of ITS-CPs residing in the ITS-S networking and transport layer.
NOTE 1 The ITS-S networking and transport layer covers the OSI layers three and four; see ISO 21217.
Table 3 — Communication protocol stack elements — ITS-S networking and transport layer
Standard reference ITS communication protocol identifier Comment
[23]
{iso(1) identified-organization(3) cen(162) Localized
ISO 29281-1
cp17496 (17496) commProtocol (2) ntLayer communications
(2) itsProtocolIdentifier-1 (1)} messaging protocol
(FNTP) — partly
interoperable with
IEEE WSMP (IEEE
[27] a
Std. 1609.3™ )
[27]
{iso(1) identified-organization(3) cen(162) Localized
IEEE Std. 1609.3™
cp17496 (17496) commProtocol (2) ntLayer communications
(2) itsProtocolIdentifier-2 (2)} messaging protocol
(WSMP) —
interoperable with
ISO FNTP
[23] a
(ISO 29281-1 )
[15]
{iso(1) identified-organization(3) cen(162) Internet protocol
ISO 21210
cp17496 (17496) commProtocol (2) ntLayer version 6 (IPv6)
(2) itsProtocolIdentifier-3 (3)}
[33]
{iso(1) identified-organization(3) cen(162) Geo-location-based
ETSI EN 302 636–4-1
cp17496 (17496) commProtocol (2) ntLayer communications
(2) itsProtocolIdentifier-4 (4)} messaging protocol
(GeoNetworking).
[34]
{iso(1) identified-organization(3) cen(162) Basic Transport
ETSI EN 302 636–5-1
cp17496 (17496) commProtocol (2) ntLayer Protocol (BTP)
(2) itsProtocolIdentifier-5 (5)}
[36]
{iso(1) identified-organization(3) cen(162) User Datagram
RFC 768
cp17496 (17496) commProtocol (2) ntLayer Protocol (UDP)
(2) itsProtocolIdentifier-6 (6)}
[37]
{iso(1) identified-organization(3) cen(162) Transmission Control
RFC 793
cp17496 (17496) commProtocol (2) ntLayer Protocol (TCP)
(2) itsProtocolIdentifier-7 (7)}
[10]
{iso(1) identified-organization(3) cen(162) Low-bandwidth
ISO 19079
cp17496 (17496) commProtocol (2) ntLayer communications
(2) itsProtocolIdentifier-8 (8)} using 6LoWPAN
a
Interoperability is at least given for the information dissemination mode (broadcast communications), as
[27] [5]
IEEE Std. 1609.3™ only requires this mode out of the set of all modes identified in ISO/TS 16460 and
[23]
ISO 29281-1 .
NOTE 2 Further standard references can be identified and linked to an ITS protocol identifier at a later stage.
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8.2.3 ITS-S facilities layer
Table 4 presents ITS protocol identifiers of ITS-CPs residing in the ITS-S facilities layer.
NOTE 1 The ITS-S facilities layer covers the OSI layers five, six and seven; see ISO 21217.
Table 4 — Communication protocol stack elements — ITS-S facilities layer
Standard reference ITS communication protocol Comment
identifier
[1]
{iso(1) identified- Universal gateway protocol
ISO 13185-2
organization(3) cen(162)
cp17496 (17496)
commProtocol (2) fcLayer (4)
itsProtocolIdentifier-1 (1)}
[3]
{iso(1) identified- Unified diagnostic services -
ISO 14229-2
organization(3) cen(162) session layer services
cp17496 (17496)
commProtocol (2) fcLayer (4)
itsProtocolIdentifier-2 (2)}
[8]
{iso(1) identified- Generic message transmission
ISO/TS 17429
organization(3) cen(162) using the “Facilities Service
cp17496 (17496) Handler” (FSH); managed by the
commProtocol (2) fcLayer (4) “Communication Profile Handler”
itsProtocolIdentifier-3 (3) } (CPH).
[14]
{iso(1) identified- Global Transport Data
FprCEN ISO/TS 21184
organization(3) cen(162) Management (GTDM) framework
cp17496 (17496)
commProtocol (2) fcLayer (4)
itsProtocolIdentifier-4 (4)}
[20]
{iso(1) identified- Application programming
ISO 22900-2
organization(3) cen(162) interface for diagnostic protocol
cp17496 (17496) data unit
commProtocol (2) fcLayer (4)
itsProtocolIdentifier-5 (5)}
[4]
{iso(1) identified- Unified diagnostic services on
ISO 14229-5
organization(3) cen(162) Internet Protocol implementation
cp17496 (17496) (UDSonIP)
commProtocol (2) fcLayer (4)
itsProtocolIdentifier-6 (6)}
[21]
{iso(1) identified- Remote ITS station management
ISO 24102-2
organization(3) cen(162) protocol:
cp17496 (17496)
Remote management
commProtocol (2) fcLayer (4)
communication handler (RMCH)
itsProtocolIdentifier-7 (7)}
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Standard reference ITS communication protocol Comment
identifier
[19]
{iso(1) identified- Service announcement protocol:
EN ISO 22418
organization(3) cen(162)
FSAP communication manager
cp17496 (17496)
commProtocol (2) fcLayer (4)
itsProtocolIdentifier-8 (8)}
[22]
{iso(1) iden
...