EN 17905:2023

SLOVENSKI STANDARD
01-april-2024
Inteligentni transportni sistemi - e-Varnost - e-Klic HLAP v hibridnih omrežnih
okoljih s komutiranim vezjem/paketno komutiranim omrežjem
Intelligent transport systems - eSafety - eCall HLAP in hybrid circuit switched/packet
switched network environments
Intelligente Verkehrssysteme - eSicherheit - Übergeordnetes eCall-Anwendungsprotokoll
(HLAP) in hybriden geschalteten Netzwerkumgebungen
Systèmes de transport intelligents - eSafety - HLAP d’eCall dans les environnements
réseaux hybrides à commutation de circuits et de paquets
Ta slovenski standard je istoveten z: EN 17905:2023
ICS:
03.220.20 Cestni transport Road transport
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.

EN 17905
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2023
EUROPÄISCHE NORM
ICS 03.220.20; 35.240.60
English Version
Intelligent transport systems - eSafety - eCall HLAP in
hybrid circuit switched/packet switched network
environments
Systèmes de transport intelligents - eSafety - HLAP Intelligente Verkehrssysteme - eSicherheit -
d'eCall dans les environnements réseaux hybrides à Übergeordnetes eCall-Anwendungsprotokoll (HLAP) in
commutation de circuits et de paquets hybriden geschalteten Netzwerkumgebungen
This European Standard was approved by CEN on 22 October 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17905:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Symbols and abbreviations . 9
5 Conformance . 9
6 General overview of the eCall session for Pan European eCall . 10
7 Requirements . 11
7.1 General. 11
7.2 General requirements . 11
7.2.1 Enabled IVS . 11
7.2.2 Enabled PSAP . 12
7.3 Procedures following power-up of the in-vehicle system: self-test . 12
7.4 Activation . 13
7.5 Call setup (IVS) . 13
7.5.1 General. 13
7.5.2 eCall activation . 13
7.5.3 eCall in progress . 13
7.5.4 Domain selection . 13
7.5.5 Fallback . 15
7.5.6 Domain handover . 15
7.6 PSAP application features . 16
7.6.1 General. 16
7.6.2 Logging of MSD transfer type . 16
7.6.3 MSD (update) request . 16
7.6.4 Information to operator about hybrid situation . 17
7.7 Handling non equipped situations / error cases . 17
7.7.1 Network registration fails . 17
7.7.2 Other issues . 17
8 Third party services supported eCall (TPS-eCall) . 17
9 Defences against attack (Security provisions) . 17
10 Quality of service requirements . 17
11 Test and conformance requirements . 17
12 Marking, labelling and packaging . 18
13 Declaration of patents and intellectual property . 18
Annex A (informative) Transitional Use Cases . 19
Bibliography . 21

European foreword
This document (EN 17905:2023) has been prepared by Technical Committee CEN/TC 278 “Intelligent
transport systems”, the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2024, and conflicting national standards shall be
withdrawn at the latest by May 2024.
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 is the result of narrowing down the scope of PREN 17184 (during its review and upgrade
to EN) to exclusively describe the eCall High Level Application Protocols in packet switched networks and
as such partly supersedes CEN/TS 17184.
The document complements EN 16062 and prEN 17184.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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, Türkiye and the United
Kingdom.
Introduction
An eCall is an emergency call generated either automatically via activation of in-vehicle sensors or
manually by the vehicle occupants; when activated, to provide notification and relevant location
information to the most appropriate Public Safety Answering Point (PSAP), by means of mobile wireless
communications networks and carries a defined standardized minimum set of data, notifying that there
has been an incident that requires response from the emergency services and establishes an audio
channel between the occupants of the vehicle and the most appropriate PSAP.
NOTE The term PSAP, which is most widely used in the eCall documentation, European Commission
documents, etc., is used throughout this document and equates to the term emergency call response centre used in
the ITS Implementation Directive.
EN 15722 specifies a standardized MSD for eCall, and EN 16072 specifies pan-European eCall operating
requirements (for third party systems, EN 16102 specifies third party services supporting eCall operating
requirements; see EC Communication on eCall Implementation 2009 [COM(2009) 434 final] and Official
Journal eCall Recommendation C_2011_6269, for more information).
The pan-European eCall are made using Public Land Mobile Networks (PLMN) for which operating
requirements are specified in a number of ETSI standards and technical specifications. In order to provide
the eCall service across a wireless network, high level application protocols are required as an essential
element to affect this service provision. Originally PLMNs were circuit switched networks for which
EN 16062 specifies High Level Application Protocols. In these networks eCall uses Teleservice No 12
(TS12) and in-band modem transfer of data.
Over time new communications technologies have become available. These technologies use so called
‘packet switched’ technologies using Internet Protocols (IP). Particularly, 3GPP has evolved a
communication management system called IMS (IP Multimedia Subsystem) which is suitable to operate
over a number of bearer technologies, including LTE, NR and their successors. It is anticipated that packet
switched networks (such as LTE, NR and their successors), which now co-exist with circuit switched
networks (like GSM/UMTS), will, over the course of time, replace circuit switched networks.
EN 17184 provides High Level Application Protocols (HLAP) for eCall using IMS over packet switched
networks. It provides the equivalent of EN 16062 for circuit switched networks and should be suitable
for all/any packet switched networks and wireless access such as LTE, NR and their successors.
During at least a couple of years, packet switched networks will not be available throughout the working
area of eCall. In other areas both circuit switched and packet switched networks will co-exist, but there
will be areas that only have packet switched network services. This document specifies the protocols in
this hybrid situation, in order to make sure that pan-European eCall will function as efficiently as possible.
NOTE A (possibly) large number of vehicles support circuit switched in-band eCall only (and not eCall using
IMS over packet switched networks). For these to be able to continue using the eCall service either the onboard
equipment will need to be upgraded (to support eCall using IMS) or sufficient circuit switched networks need to
remain operational. This falls outside the scope of this document and is not addressed herein.
The European Committee for Standardization (CEN) draws attention to the fact that, while no direct
patents are known in express regard to the content of these specifications, the underlying ETSI
communications Standards may involve patents and the reader is directed to the referenced ETSI
standards in these respects. Similarly, as this standard relies on EN 16062 and EN 17184 the
specifications below may involve the use of patents specified in these standards, and the reader is
directed to these documents in respect of these aspects.
1 Scope
In respect of 112-eCall (pan-European eCall) (operating requirements defined in EN 16072), this
document defines the additional high level application protocols, procedures and processes required to
provide the eCall service whilst there are still both circuit switched and packet switched wireless
communication networks in operation.
NOTE The objective of implementing the pan-European in-vehicle emergency call system (eCall) is to automate
the notification of a traffic accident, wherever in Europe, with the same technical standards and the same quality of
services objectives by using a PLMN (such as ETSI prime medium) which supports the European harmonized
112/E112 emergency number (using TS12 or IMS equivalant) and to provide a means of manually triggering the
notification of an emergency incident.
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 15722, Intelligent transport systems - ESafety - ECall minimum set of data
EN 16062, Intelligent transport systems - ESafety - eCall high level application requirements (HLAP)
using GSM/UMTS circuit switched networks
EN 16072, Intelligent transport systems - ESafety - Pan-European eCall operating
requirements
EN 16454, Intelligent transport systems - ESafety - ECall end to end conformance testing
EN 17184:—, Intelligent transport systems – eSafety - eCall High level application Protocols (HLAP)
using IP Multimedia Subsystem (IMS) over packet switched networks
EN 17240:—, Intelligent transport systems - ESafety - ECall end to end conformance testing for IMS
packet switched based systems
EN 18052:—, Intelligent transport systems - ESafety - ECall end to end conformance testing eCall
HLAP in hybrid circuit switched/packet switched network environments
ETSI TS 122 011, Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile
Telecommunications System (UMTS); LTE; Service accessibility (3GPP TS 22.011) [Release 14 or
later]
ETSI TS 123 122, Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile
Telecommunications System (UMTS); LTE; Non-Access-Stratum (NAS) functions related to Mobile Station
(MS) in idle mode (3GPP TS 23.122) [Release 14 or later]
ETSI TS 123 167, Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia
Subsystem (IMS) emergency sessions (3GPP TS 23.167) [Release 14 or later]

To be published. Stage at the time of publication: prEN 17184:2023.
To be published. Stage at the time of publication: prEN 17240:2023.
To be published. Stage at the time of publication: prEN 18052:2023.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
single European emergency call number supporting Teleservice 12
Note 1 to entry: See ETSI TS 122 003.
3.2
cellular network
wireless communications network consisting of multiple adjacent access points (cells) with the capability
of homogeneous transfer of a communications session instance to an adjacent cell without significant
interruption to the session
3.3
CS-eCall
CS eCall
eCall over CS
emergency call generated either automatically via activation of in-vehicle sensors or manually by the
vehicle occupants via a circuit switched mobile network
3.4
data
representations of static or dynamic objects in a formalized manner suitable for communication,
interpretation, or processing by humans or by machines; in packet switched networks, voice is carried in
packets of data
3.5
E112
emergency communications service using the single European emergency call number, 112, which is
enhanced with location information of the calling user
Note 1 to entry: The number is not actually used directly in the communication but sets indicators in the IMS call
header that identifies the call as an emergency call of type ‘eCall’ to the MNO.
3.6
eCall
emergency call generated either automatically via activation of in-vehicle sensors or manually by the
vehicle occupants
Note 1 to entry: When activated it provides notification and relevant location information to the most appropriate
Public Safety Answering Point, by means of mobile wireless communications networks, carries a defined standardized
minimum set of data (MSD) notifying that there has been an incident that requires response from the emergency
services, and establishes an audio channel between the occupants of the vehicle and the most appropriate Public
Safety Answering Point.
3.7
eCall generator
occupant of a vehicle or equipment within a vehicle that has cause to trigger an eCall session by automatic
or manual means
3.8
eCall service
end-to-end emergency service to connect occupants of an affected vehicle to the most appropriate PSAP
via an audio link across a PLMN together with the transfer of a minimum set of data to the PSAP
3.9
eCall session
establishment of a mobile wireless communications session across a public wireless communications
network and the transmission of a minimum set of data from a vehicle to a public safety answering point
and the establishment of an audio channel between the vehicle and the PSAP
3.10
emergency call response centre
term used in ITS Implementation Directive to mean Public Safety Answering Point (PSAP)
3.11
identifier
label, symbol or token that names or identifies an entity or a collection of data or the means of designating
or referring to a specific instance of a data concept
3.12
in-vehicle equipment
equipment within the vehicle that provides or has access to in-vehicle data required for the minimum set
of data and any other data that is to be sent as part of or complementary to the minimum set of data to
effect the eCall session via a public mobile wireless communications network providing a link between
the vehicle and a means of enacting the eCall service via a public mobile wireless communications
network
3.13
in-vehicle system
IVS
in-vehicle equipment together with the means to trigger, manage and effect the eCall session
3.14
IMS-eCall
IMS eCall
eCall over IMS
manually or automatically initiated IMS emergency call, from an IVS, supplemented with a minimum set
of data (MSD), via a packet switched mobile network
3.15
minimum set of data
MSD
standardized data concept comprising data elements of relevant vehicle generated data essential for the
performance of the eCall service
Note 1 to entry: See EN 15722.
3.16
mobile wireless communications network
wireless communications network with homogeneous handover between network access points
3.17
mobile wireless communications network device
device providing communications to a mobile wireless communications network with homogeneous
handover between network access points
3.18
most appropriate PSAP
destination for eCall defined beforehand by responsible authorities to cover emergency calls from a
certain area or for emergency calls of a certain type
Note 1 to entry: See also PSAP.
Note 2 to entry: A number of different instantiations of PSAP service are supported within this document. A PSAP
can be a Public Authority or a private service provider operating on behalf of the responsible authorities.
3.19
Network Access Device
NAD
see mobile wireless communications network device
3.20
Public Safety Answering Point
PSAP
physical location working on behalf of the national authorities where emergency calls are first received
under the responsibility of a public authority or a private organization recognized by the national
government
Note 1 to entry: See also most appropriate PSAP.
Note 2 to entry: A number of different instantiations of PSAP service are supported within this document.
3.21
service provider
physical and functional component responsible for providing telematics based services to its subscribers
3.22
vehicle occupant
person inside the vehicle
3.23
wireless communications network
network operating using an air-interface capable of bi-directional transfer of data and or voice
Note 1 to entry: There are different types of wireless communications such as PAN, LAN, cellular network, etc.
4 Symbols and abbreviations
3G rd
3 Generation
3GPP Third Generation Partnership Project
CLI Calling Line Identification
CS Circuit Switched
EC European Commission
ECL eCall over IMS support indicator
EMS IMS Emergency Service support indicator
ETSI European Telecommunications Standards Institute
GSM Global System for Mobile communications
IMS IP Multimedia Subsystem
IVS In-Vehicle System
LAN Local Area Network
LTE Long Term Evolution
MNO Mobile Network Operator
MSD Minimum Set of Data
NAD Network Access Device
NR New Radio
PLMN Public Land Mobile Network
PS Packet Switched
PSAP Public Safety Answering Point
TPS Third Party Service
TPSP Third Party Service Provider
TS Technical Specification
TS12 Teleservice 12
UMTS Universal Mobile Telecommunication System
USIM Universal Subscriber Identity Module
VoIMS Voice over IMS
5 Conformance
Conformance requirements are to be found in EN 18052 and subsequently in EN 16454 (for circuit
switched networks) and EN 17240 (for packet switched networks).
6 General overview of the eCall session for Pan European eCall
As described in the introduction to the document EN 16062, eCall is an emergency call generated either
automatically via activation of in-vehicle sensors or manually by the vehicle occupants (the eCall
generator); when activated, it provides notification and relevant location information to the most
appropriate Public Safety Answering Point, by means of mobile wireless communications networks and
carries a defined standardized minimum set of data, notifying that there has been an incident that requires
response from the emergency services and establishes an audio channel between the occupants of the
vehicle and the most appropriate Public Safety Answering Point.
Figure 1 shows an illustrative view of the pan-European eCall service, as defined in EN 16072.

Figure 1 — General overview: 112-eCall service using GSM/UMTS
In circuit switched mobile networks the eCall is identified as an emergency call and specifically an eCall
in the telecircuit switching (TS) process. The emergency number (112) is not dialled as the TS identifiers
inform the MNO that the call is an emergency call/eCall and the MNO has procedures to direct these calls
to “the most appropriate” PSAP. Having established a voice channel, the onboard eCall unit then mutes
microphones and speakers and uses a modem to transfer the Minimum Set of Data (MSD) to the PSAP
before unmuting the audio devices to enable conversation between the PSAP operator and the occupants
of the vehicle. This high level paradigm for circuit switched networks is described and standardized in
EN 16062 and tests for conformance are found in EN 16454.
The eCall paradigm can be extended to other means of communications and notably to packet switched
mobile networks (such as LTE, NR and their successors) that have become available providing new
PLMNs. In such networks eCall uses IMS and an eCall is established as an internet protocol based session
to a specific URN designating the call as either a manual or automatic eCall. The MSD is provided as part
of the session establishment and after it has been set up packets of data (which in this case, are largely
packets of voice data) are exchanged. The high level paradigm for packet switched networks is described
analogously to the circuit switched
...