SIST-TS CEN/TS 17184:2023

SLOVENSKI STANDARD
SIST-TS CEN/TS 17184:2023
01-maj-2023
Nadomešča:
SIST-TS CEN/TS 17184:2018
Inteligentni transportni sistemi - e-Varnost - Visokonivojski aplikacijski protokoli
za e-Klic (HLAP) z uporabo IP multimedijskega podsistema (IMS) v paketno
preklopnih omrežjih
Intelligent transport systems - eSafety - eCall High level application protocols (HLAP)
using IP Multimedia Subsystem (IMS) over packet switched networks
Intelligente Verkehrssysteme - eSicherheit - Allgemeines eCall Anwendungsprotokoll
(HLAP) unter Verwendung von IMS paketvermittelnden Netzwerken
Systèmes de transport intelligents - ESafety - Exigences de protocole d'application de
haut niveau (HLAP) relatives à l'eCall via des systèmes IMS basés sur la commutation
de paquets
Ta slovenski standard je istoveten z: CEN/TS 17184:2022
ICS:
03.220.01 Transport na splošno Transport in general
35.240.60 Uporabniške rešitve IT v IT applications in transport
prometu
SIST-TS CEN/TS 17184:2023 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 17184:2023


CEN/TS 17184
TECHNICAL SPECIFICATION

SPÉCIFICATION TECHNIQUE

December 2022
TECHNISCHE SPEZIFIKATION
ICS 35.240.60 Supersedes CEN/TS 17184:2018
English Version

Intelligent transport systems - eSafety - eCall High level
application protocols (HLAP) using IP Multimedia
Subsystem (IMS) over packet switched networks
Systèmes de transport intelligents - ESafety - Exigences Intelligente Verkehrssysteme - eSicherheit -
de protocole d'application de haut niveau (HLAP) Allgemeines eCall Anwendungsprotokoll (HLAP) unter
relatives à l'eCall via des systèmes IMS basés sur la Verwendung von IMS paketvermittelnden Netzwerken
commutation de paquets
This Technical Specification (CEN/TS) was approved by CEN on 30 October 2022 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, 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17184:2022 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 . 8
4 Symbols and abbreviations . 12
5 Conformance . 13
6 General overview of pan European eCall session via Packet Switched networks . 13
6.1 General principle . 13
6.2 eCall over Packet Switched networks . 14
6.3 eCall using IMS over Packet Switched networks . 14
6.4 The hybrid situation . 19
7 Requirements . 20
7.1 General requirements . 20
7.1.1 General . 20
7.1.2 Enabled IVS. 20
7.1.3 Enabled PSAP . 20
7.1.4 eCall only IVS . 20
7.2 Procedures following power-up of the in-vehicle system . 21
7.2.1 Self-test . 21
7.2.2 Standby mode applicable to eCall only IVS . 21
7.3 Activation . 21
7.3.1 Activation of eCall using IMS over packet switched networks . 21
7.3.2 Activation of a test eCall . 22
7.4 Call set-up . 22
7.4.1 General . 22
7.4.2 eCall in progress . 22
7.4.3 Network selection and registration . 23
7.4.4 Authentication of the subscriber . 23
7.4.5 Establishment of an eCall using IMS over packet switched networks . 23
7.4.6 Cell localization (by network) . 24
7.4.7 Manual termination of eCall by vehicle occupants before trigger confirmation . 24
7.4.8 Call failure . 24
7.4.9 Security . 24
7.5 MSD transfer for eCall using IMS over packet switched networks . 24
7.6 Application layer acknowledgement (AL-ACK) . 25
7.6.1 General . 25
7.6.2 Successful receipt by the PSAP of the initial MSD . 26
7.6.3 Unsuccessful receipt by the PSAP of initial MSD . 26
7.6.4 No receipt of acknowledgement . 26
7.6.5 Other forms of acknowledgement . 27
7.7 PSAP requests a new MSD . 27
7.7.1 General . 27
7.7.2 Before session clear-down . 27
7.7.3 After session clear-down . 28
7.8 MSD transfer using in-band modem (optional) . 28
7.9 Audio link to vehicle occupants . 28
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7.10 eCall clear-down . 28
7.11 PSAP call back . 29
7.12 Rerouting to another PSAP/emergency control centre . 29
7.13 Handling non equipped situations / error cases . 30
7.13.1 Network related issues . 30
7.13.2 MSD related issues . 30
7.13.3 PSAP network/ICT failure . 31
7.13.4 Call related issues . 32
8 Third party services supported eCall (TPS-eCall) . 32
9 Defences against attack (Security provisions) . 33
10 Quality of service requirements . 33
11 Test and conformance requirements . 33
12 Marking, labelling and packaging . 33
13 Declaration of patents and intellectual property . 33
Annex A (normative) Table of timings . 34
Annex B (informative) SIP and IMS explained. 36
Bibliography . 50

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SIST-TS CEN/TS 17184:2023
CEN/TS 17184:2022 (E)
European foreword
This document (CEN/TS 17184:2022) has been prepared by Technical Committee CEN/TC 278
“Intelligent transport systems”, the secretariat of which is held by NEN.
This document supersedes CEN/TS 17184:2018.
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.
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.
Part of this revision of the document is aimed at making it purely packet switched and removing
references to eCall over circuit switched networks, this in order to make the document future proof.
In comparison with the previous edition, the following technical modifications have been made:
— reordering and combining of some clauses to better reflect coherence and provide consistency
(numbering below refers to the current numbering; where this differs from the numbering in the
previous published version of this document, the original number is cited stroke through and
between brackets)
— provide a mechanism to transfer the MSD via in-band modem via IMS as an option (Clause 7.8 (7.3.6
and 7.4.3))
— added expected IVS behaviour after reception of 6xx or 4xx response including positive MSD ACK
(updated Clauses 7.4.1, 7.6.2 and 7.13.3 (7.3.6 and 7.14.4))
— removed section about PSAP application (7.8) which was moved to EN 16072
— updated expected IVS behaviour when the PSAP operator does not respond (updated
Clauses 7.13.3.2 and 7.13.3.3 (7.14.3 and 7.14.4))
— updated definition of test eCall activation (updated Clauses 7.3.2 and 7.4.5 (7.2.2 and 7.3.6))
— updated Clauses 7.5, 7.13.1, 7.13.4.1 (7.4.2, 7.4.3, 7.5.2, 7.13.3, 7.13.4.2) and Annex B
— updated terms, definitions, symbols and abbreviations
— removed requirement to fall-back to CS eCall
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, Türkiye and the
United Kingdom.
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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.
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) and EN 16062 specifies High Level
Application Protocols for eCall using GSM/UMTS.
The operating requirements for pan-European eCall are made using Public Land Mobile Networks
(PLMN) (such as GSM and UMTS, and latterly LTE, NR and their successors), as 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 important essential element to affect this service provision.
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.
Subsequent to the publication of the suite of eCall standards (EN 16072, EN 16062 and EN 16454) which
support the eCall Regulations, new communications technologies have become available. Over the course
of time, these networks (such as LTE, NR and their successors) are expected to complement and
eventually replace the circuit switched GSM/UMTS networks. These technologies use so called ‘packet
switched’ technologies using Internet protocols (IP). Particularly, 3GPP have 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.
In circuit switched networks the eCall is identified as an emergency call and specifically an eCall in the
telecircuit switching (TS) process. No number is 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 microphones and speakers are muted and a modem is used
to transfer the Minimum Set of Data (MSD) to the PSAP before opening up the line to enable conversation
between the PSAP operator and the occupants of the vehicle.
In a ‘packet switched’ network, packets of data (including voice) are sent using an internet protocol (IP)
communication system. 3GPP have created the IP Multimedia Subsystem (IMS) which makes use of SIP
(Session Initiation Protocol) for its call management.
This document provides High Level Application Protocols (HLAP) for eCall using IMS. It therefore
provides the IMS packet switched equivalent of EN 16062 for circuit switched networks and should be
suitable for all/any packet switched networks that support IMS and wireless access such as LTE, NR and
their successors.
This document specifies the protocols to put into effect the pan-European eCall operating requirements,
over packet switched networks networks (such as LTE, NR and their successors).
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.
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1 Scope
In respect of pan European eCall (operating requirements defined in EN 16072), this document defines
the high level application protocols, procedures and processes required to provide the eCall service via a
packet switched wireless communications network using IMS (IP Multimedia Subsystem) and wireless
access (such as LTE, NR and their successors).
This document assumes support of eCall using IMS over packet switched networks by an IVS and a PSAP
and further assumes that all PLMNs available to an IVS at the time an eCall or test eCall is initiated are
packet switched networks. Support of eCall where eCall using IMS over packet switched networks is not
supported by an IVS or PSAP is out of the scope of this document.
At some moment in time packet switched networks will be the only Public Land Mobile Networks (PLMN)
available. However as long as GSM/UMTS PLMNs are available (Teleservice 12/TS12) ETSI TS 122 003
will remain operational. Both the use of such PLMNs and the logic behind choosing the appropriate
network in a hybrid situation (where both packet-switched and circuit-switched networks are available)
are out of scope of this document.
NOTE 1 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 (TS12 ETSI TS 122 003 or IMS packet switched network) and to provide a means of
manually triggering the notification of an emergency incident.
NOTE 2 HLAP requirements for third party services supporting eCall can be found in EN 16102,. This document
makes reference to those provisions but does not duplicate them.
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 16072:2022, Intelligent transport systems - ESafety - Pan-European eCall operating requirements
EN 16454, Intelligent transport systems - ESafety - ECall end to end conformance testing
CEN/TS 17240, Intelligent transport systems - ESafety - ECall end to end conformance testing for IMS packet
switched based systems
ETSI TS 122 003, Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile
Telecommunications System (UMTS); LTE; Circuit Teleservices supported by a Public Land Mobile Network
(PLMN) (3GPP TS 22.003) [Release 14 or later]
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 122 071, Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile
Telecommunications System (UMTS); LTE; Location Services (LCS); Service description; Stage 1
(3GPP TS 22.071 [Release 14 or later]
ETSI TS 122 101, Universal Mobile Telecommunications System (UMTS); LTE; Service aspects; Service
principles (3GPP TS 22.101) [Release 14 or later]
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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]
ETSI TS 123 216, Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile
Telecommunications System (UMTS); LTE; Single Radio Voice Call Continuity (SRVCC); Stage 2
(3GPP TS 23.216) [Release 14 or later]
ETSI TS 123 401, LTE; General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial
Radio Access Network (E-UTRAN) access (3GPP TS 23.401) [Release 14 or later]
ETSI TS 123 501, 5G; System architecture for the 5G System (5GS) (3GPP TS 23.501) [Release 14 or later]
ETSI TS 124 229, Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile
Telecommunications System (UMTS); LTE; IP multimedia call control protocol based on Session Initiation
Protocol (SIP) and Session Description Protocol (SDP); Stage 3 (3GPP TS 24.229) [Release 14 or later]
ETSI TS 124 301, Universal Mobile Telecommunications System (UMTS); LTE; Non-Access-Stratum (NAS)
protocol for Evolved Packet System (EPS); Stage 3 (3GPP TS 24.301) [Release 14 or later]
ETSI TS 124 501, 5G; Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3 (3GPP TS 24.501)
[Release 14 or later]
ETSI TS 131 102, Universal Mobile Telecommunications System (UMTS); LTE; Characteristics of the
Universal Subscriber Identity Module (USIM) application (3GPP TS 31.102) [Release 14 or later]
ETSI TS 133 203, Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile
Telecommunications System (UMTS); LTE; 3G security; Access security for IP-based services
(3GPP TS 33.203) [Release 14 or later]
ETSI TS 136 331, LTE; Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC);
Protocol specification (3GPP TS 36.331) [Release 14 or later]
ETSI TS 138 331, 5G; NR; Radio Resource Control (RRC); Protocol specification (3GPP TS 38.331) [Release
15 or later]
IETF RFC 8147, Next-Generation Pan-European eCall
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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
112
single European emergency call number supporting Teleservice 12
Note 1 to entry: See ETSI TS 122 003.
3.2
call clear-down
termination of call and freeing up of line (usually achieved by hanging up the receiver or pressing ‘end
call’ or similar on screen)
3.3
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
3.4
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
data concept
any of a group of data structures (i.e. object class, property, value domain, data elements, message,
interface dialogue, association) referring to abstractions or things in the natural world that can be
identified with explicit boundaries and meaning and whose properties and behaviour all follow the same
rules
3.6
data element
single unit of information of interest (such as a fact, proposition, observation, etc.) about some (entity)
class of interest (e.g. a person, place, process, property, concept, state, event) considered to be indivisible
in a particular context
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3.7
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.
3.8
eCall generator
occupant of a vehicle or equipment within a vehicle that has cause to trigger an eCall session by automatic
or manual means
3.9
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
3.10
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
3.11
Emergency Call Server
ECS
functional entity that consists of a Location Retrieval Function (LRF) and either a routing proxy or a
redirect server, e.g. an ECS contains a VPC and a Routing Proxy or Redirect Server in NENA I2 architecture
3.12
emergency control centre
unit which deals with emergency calls and which has the capacity to consider professionally the need for
response, and which has the provision to mobilise the needed resources to deal with the emergency in
question
3.13
emergency call response centre
term used in ITS Implementation Direct
...