SIST-TS CEN/TS 17182:2019
(Main)Intelligent transport systems - eSafety - eCall via an ITS-station
Intelligent transport systems - eSafety - eCall via an ITS-station
In respect of 112-eCall (3.1) (operating requirements defined in EN 16072:2015), this Technical
Specification defines the high level application protocols (3.10), procedures and processes required to
provide the eCall service via an ISO 21217 compliant “ITS station unit”
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 'Public Land Mobile Network' (PLMN) (such as ETSI prime medium)
which supports the European harmonized 112/E112 emergency number and to provide a means of manually
triggering the notification of an emergency incident.
NOTE 2 Requirements for third party services supporting eCall can be found in EN 16102 [6], and have been
developed in conjunction with the development of EN 16072:2015 and EN 16072:2015, and are consistent in
respect of the interface to the PSAP. This technical specification applies only to 112-eCall (3.1) service provision
and makes no specifications in respect of third party eCall service provision, and the reader is referred to
EN 16102 [6] for any third party eCall specifications.
Intelligente Verkehrssysteme - eSicherheit - eCall über eine ITS-Station
Bezüglich 112-eCall (3.1) (Betriebsanforderungen nach EN 16072:2015) legt diese Technische Spezifikation die Anwendungsprotokolle höchster Ebene (3.10), Prozeduren und Verfahren fest, die zur Bereitstellung des eCall-Dienstes über eine ISO 21217-konforme „ITS-Stationseinheit“ erforderlich sind.
ANMERKUNG 1 Das Ziel der Implementierung eines gesamteuropäischen, bordeigenen Notrufsystems (eCall) ist, die Meldung eines Verkehrsunfalls an einem beliebigen Ort in Europa mit denselben technischen Standards und derselben Qualität der Dienst-Zielvorgaben zu automatisieren, indem ein öffentliches landgestütztes Mobilfunknetz (PLMN, en: Public Land Mobile Network) (z. B. ETSI Prime Medium) genutzt wird, das die vereinheitlichte Europäische Notrufnummer 112/E112 unterstützt, und ein Mittel zur manuellen Auslösung der Meldung eines Notfalls bereitzu-stellen.
ANMERKUNG 2 Anforderungen für Dienste dritter Parteien, die eCall unterstützen, sind in der EN 16102 [5] zu finden und wurden in Abstimmung mit der Entwicklung der EN 16072:2015 und der EN 16072:2015 entwickelt und sind bezüglich der Schnittstelle zur Notrufzentrale konsistent. Dieses Lieferergebnis gilt nur für die Bereitstellung von 112-eCall (3.1)-Diensten und stellt eine Spezifikationen bezüglich der Bereitstellung von eCall-Diensten durch dritte Parteien dar, und der Leser wird bezüglich jeglicher drittparteilicher eCall-Spezifikationen auf EN 16102 [6] verwiesen.
Systèmes de transport intelligents - ESafety - eCall via une station ITS
Inteligentni transportni sistemi - e-Varnost - e-Klic prek postaje ITS
V zvezi s storitvijo 112-e-Klic (3.1) (operativne zahteve so opredeljene v standardu EN 16072:2015) ta tehnična specifikacija opredeljuje visokonivojske aplikacijske protokole (3.10), postopke in procese, potrebne za
zagotavljanje storitve e-Klic prek »enote postaje ITS«, skladne s standardom ISO 21217.
OPOMBA 1: Cilj uvedbe vseevropskega sistema za klic v sili v vozilih (e-Klic) je avtomatizirati obveščanje ob prometni nesreči povsod v Evropi z enakimi tehničnimi standardi in enakimi cilji glede kakovosti storitev na podlagi »javnih kopenskih mobilnih omrežij« (PLMN) (kot je primarni medij ETSI), ki podpirajo evropsko usklajeno številko za nujne primere 112/E112, ter zagotoviti način za ročno pošiljanje obvestila ob prometni nesreči.
OPOMBA 2: Zahteve za storitve tretjih strani v podporo e-Klicu so navedene v standardu EN 16102 [6] in so bile pripravljene v povezavi z razvojem standardov EN 16072:2015 in EN 16072:2015, pri čemer je zagotovljena skladnost z vmesnikom za odzivno točko javne varnosti. Ta tehnična specifikacija se uporablja samo za izvajanje storitve 112-e-Klic (3.1) in ne podaja nobenih specifikacij v zvezi z izvajanjem storitve elektronskega klica v sili tretjih strani, uporabnik lahko specifikacije za storitve elektronskega klica v sili tretjih strani najde v standardu EN 16102 [6].
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST-TS CEN/TS 17182:2019
01-januar-2019
Inteligentni transportni sistemi - e-Varnost - e-Klic prek postaje ITS
Intelligent transport systems - eSafety - eCall via an ITS-station
Intelligente Verkehrssysteme - eSicherheit - eCall über eine ITS-Station
Systèmes de transport intelligents - ESafety - eCall via une station ITS
Ta slovenski standard je istoveten z: CEN/TS 17182:2018
ICS:
35.240.60 Uporabniške rešitve IT v IT applications in transport
prometu
SIST-TS CEN/TS 17182:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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CEN/TS 17182
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
October 2018
TECHNISCHE SPEZIFIKATION
ICS 35.240.60
English Version
Intelligent transport systems - eSafety - eCall via an ITS-
station
Systèmes de transport intelligents - ESafety - eCall via Intelligente Verkehrssysteme - eSicherheit - eCall über
une station ITS eine ITS-Station
This Technical Specification (CEN/TS) was approved by CEN on 16 March 2018 for provisional application.
The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.
CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17182:2018 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 . 9
5 Conformance . 11
6 General overview of the eCall session for 112-European eCall via an ISO 21217
compliant ITS station unit . 11
6.1 Pan European eCall . 11
6.2 eCall via circuit switched networks . 11
6.3 eCall using SIP and IMS (IMS-eCall) . 12
6.4 Hybrid communications in an ITS station . 13
7 General Requirements . 16
8 Specific ITS-station requirements. 16
8.1 eCall ITS-S application process identifiers . 16
8.2 Secure installation of the eCall ITS-S application process in an ITS-SU . 17
8.3 Registration of the eCall ITS-S application process in an ITS-SU . 17
8.4 Activation of the eCall service in an ITS-SU . 17
8.5 Call set-up. 18
8.5.1 General . 18
8.5.2 Flow registration . 18
8.6 Procedures. 21
8.6.1 Mandatory preferred operational mode . 21
8.6.2 Mandatory fall-back mode . 21
8.6.3 Optional fall-back mode. 21
8.7 SIP protocol stack . 21
8.8 Voice interface in an ITS-SU. 22
Annex A (normative) EN ISO 17423 communication requirements . 23
A.1 General . 23
A.2 Mandatory preferred mode CSPs . 23
A.3 Optional fall-back mode CSPs . 25
Annex B (normative) Using localized communications . 28
B.1 Preconditions . 28
B.2 General information . 28
B.3 V-ITS-SU architecture overview . 31
B.4 Networking options . 32
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B.5 Requirements . 34
B.5.1 Pre-conditions . 34
B.5.2 General requirements for service advertisement . 34
B.5.3 Requirements for service advertisement specific to eCall . 35
Annex C (informative) Table of timings . 36
Annex D (informative) Extracts from REGULATION (EU) 2015/758 OF THE EUROPEAN
PARLIAMENT AND OF THE COUNCIL . 39
Bibliography . 40
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European foreword
This document (CEN/TS 17182:2018) 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.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
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Introduction
As a result of European Regulation, from 2018, all new model Class M1/N1 vehicles (3.13) will be
equipped with112-eCall (3.1). Other model class M1/N1 vehicles may be voluntarily equipped with
112-eCall (3.1), and work is underway to provide the benefit of eCall to other classes of vehicle,
including commercial vehicles (3.5), busses and coaches.
In the event of an incident, in-vehicle sensors will automatically trigger a 112-eCall (3.1), or it may be
manually triggered by the vehicle occupants. A voice connection is established with the European
emergency number 112 and routed to the most appropriate Public Safety Answering Point (3.15)
(PSAP). As soon as the connection is established, in the case of a GSM/UMTS connection, using circuit
switched networks, a “Minimum set of data” (3.14) (as defined in EN 15722), providing information
such as the time, location, vehicle VIN number, and driving direction, is sent as data via the voice
channel. With the advent of packet switched, IP addressed, networks, a variant has been developed, that
establishes an IMS connection (IMS supports IP multimedia applications (3.4) via IP multimedia
sessions over a multitude of IP Connectivity Access Networks, such as E-UTRAN, UTRAN, GERAN, LAN,
DOCSIS®, WiMAX™, cdma2000® and DVB-RCS2 access) in which the MSD is part of the SIP message
header, so is already available to the PSAP as soon as the communication link is established.
The cooperative ITS (C-ITS) environment is one where ITS station units (ITS-SUs) (e.g. in vehicles, at the
roadside,.) securely cooperate to exchange data with other ITS-SUs using wireless communications
technologies. The C-ITS approach provides for hybrid communications (3.11), i.e. simultaneous
availability of multiple wireless communications technologies. There is already provision for such
networks at 5,8 GHz (widely already used for road tolling and soon to be used for tachograph
monitoring and weigh in motion monitoring), 5,9 GHz for road safety applications (3.4), and of course
the packet switched cellular networks mentioned above. In the future, 60 GHz and other wireless
networks may be employed.
The key to managing these cooperative systems is an ITS station and communications architecture
which enables operation of ITS applications (3.4) in a managed, secure, and prioritized way. This is
support of a functionality rather than a specification of a single black box, and may be achieved in
different ways within e.g. vehicle ITS-SUs. The common functionality is defined in ISO 21217:2014
(Intelligent transport systems – Communications access for land mobiles (CALM) – Architecture) whose
abstract defines “ISO 21217:2014 describes the communications reference architecture of nodes called
“ITS station units” designed for deployment in intelligent transport systems (ITS) communication
networks. The ITS station reference architecture is described in an abstract way. While ISO 21217:2014
describes a number of ITS station elements, whether or not a particular element is implemented in an ITS
station unit depends on the specific communication requirements of the implementation.
ISO 21217:2014 also describes the various communication modes for peer-to-peer communications over
various networks between ITS communication nodes. These nodes may be ITS station units as described in
ISO 21217:2014 or any other reachable nodes.
ISO 21217:2014 also specifies the minimum set of normative requirements for a physical instantiation of
the ITS station based on the principles of a bounded secured managed domain.”
Within vehicles equipped to support this context, it is appropriate to consider eCall as a priority ITS
application (3.4) that can use this in-vehicle functionality, rather than duplicate the in-vehicle
equipment.
This Technical Specification provides the specifications enabling 112-eCall (3.1) to function via an
ISO 21217 complaint “ITS-station unit”. (ITS-SU).
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1 Scope
In respect of 112-eCall (3.1) (operating requirements defined in EN 16072:2015), this Technical
Specification defines the high level application protocols (3.10), procedures and processes required to
provide the eCall service via an ISO 21217 compliant “ITS station unit”
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 'Public Land Mobile Network' (PLMN) (such as ETSI prime medium)
which supports the European harmonized 112/E112 emergency number and to provide a means of manually
triggering the notification of an emergency incident.
NOTE 2 Requirements for third party services supporting eCall can be found in EN 16102 [6], and have been
developed in conjunction with the development of EN 16072:2015 and EN 16072:2015, and are consistent in
respect of the interface to the PSAP. This technical specification applies only to 112-eCall (3.1) service provision
and makes no specifications in respect of third party eCall service provision, and the reader is referred to
EN 16102 [6] for any third party eCall specifications.
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.
CEN/TS 17184:2018, Intelligent transport systems — eSafety — eCall High level application Protocols
(HLAP) using IMS packet switched networks
1
CEN/TS 17240 , Intelligent transport systems - ESafety - ECall end to end conformance testing for IMS
packet switched based systems
EN 15722:2015, Intelligent transport systems ― ESafety ― ECall minimum set of data
EN 16062:2015, Intelligent transport systems ― eSafety ― eCall high level application requirements
(HLAP) using GSM/UMTS circuit switched networks
EN 16072:2015, Intelligent transport systems - ESafety - Pan-European eCall operating requirements
EN 16454:2015, Intelligent transport systems ― ESafety ― ECall end to end conformance testing
EN ISO 17419:2018, Intelligent transport systems — Cooperative systems — Globally unique
identification (ISO 17419)
EN ISO 17423:2018, Intelligent transport systems — Cooperative systems — Application requirements
and objectives (ISO 17423)
CEN ISO/TS 21176, Intelligent transport systems ― Cooperative ITS ― Position, velocity and time
functionality in the ITS station
ISO/TS 16460:2016, Intelligent transport systems ― Communications access for land mobiles (CALM) ―
Communication protocol messages for global usage
1
Under preparation. Stage at the time of publication: FprCEN/TS 17240:2018.
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ISO 21217:2014, Intelligent transport systems — Communications access for land mobiles (CALM) —
Architecture
ISO 22418:2018, Intelligent transport systems — Fast service announcement protocol (FSAP)
ISO 24102-6:2018, Intelligent transport systems — ITS station management — Part 6: Path and flow
management
ETSI TS 122 101, Universal Mobile Telecommunications System (UMTS); LTE; Service aspects; Service
principles (3GPP TS 22.101) [Release 14 or later]
ETSI TS 122 003, Digital cellular communications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; Circuit Teleservices supported by a Public Land Mobile Network
(PLMN) (Teleservice 12/TC12) /E12) [Release 8 or later]
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 21217:2014, ISO 22418:2018,
EN ISO 17419:2018, EN ISO 17423:2018, ISO 24102-6:2018, CEN/TS 17184:2018 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
112-eCall
pan-European eCall regulated by the European Union as a required service provision for all M1/N1
class new model vehicles from 2018, and provided using circuit switched cellular wireless networks
(GSM/UMTS)
3.2
112 emergency voice call
voice telephone call between a caller who dials a recognised emergency services telephone number (e.g.
112) and a PSAP emergency services responder
3.3
112 IMS-eCall
pan-European eCall provided using IMS over packet switched cellular wireless networks (e.g.
E_UTRAN/LTE etc.)
3.4
application
instantiation of a service, typically provided by one or several software modules
3.5
commercial vehicle
classes of vehicles such as heavy goods vehicles used for the transportation of goods and subject to
additional requirements and controls, especially in respect to movement (Typically UNECE classes N, O
and in some cases N6)
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3.6
eCall
emergency call generated either automatically via activation of in-vehicle sensors or manually by the
vehicle occupants (the eCall generator)
Note 1 to entry: when activated, it provides notification and relevant location information to the most
appropriate Public Safety Answering Point (PSAP) (3.15), by means of mobile wireless communications networks
and carries a defined standardized Minimum set of data (3.14), 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
engine control activation
vehicle is in use (previously and commonly referred to as “ignition on”) this term embraces a similar
condition for electric, hybrid, and stop/start vehicles)
3.8
first ITS relay station unit
roadside ITS station unit acting as an eCall forwarding service advertiser
Note 1 to entry: The first ITS relay station unit may also be the last ITS relay station unit (3.12)
3.9
Flow ID
(ITS-S flow identifier)
identifier, unique within an ITS station unit, that identifies an ITS-S flow
[SOURCE: ISO 24102-6]
3.10
high level application protocols
set form and sequence in which data must be presented for handling by a particular computer
application (3.4), especially in the transmission of information between different computer systems, in
order to accurately effect the transactions of an application
3.11
hybrid communications
approach for communications using simultaneously a variety of access technologies according to the
communication needs of ITS-S application processes
3.12
last ITS relay station unit
roadside or central ITS station unit directly accessing a cellular network for connecting to a PSAP
Note 1 to entry: The last ITS relay station unit may also be the first ITS relay station unit (3.8)
3.13
M1/N1 vehicles
vehicles of the UNECE classification M1 (Power-driven vehicles having at least four wheels and used for
the carriage of passengers/Vehicles used for the carriage of passengers and comprising not more than
eight seats in addition to the driver's seat. (Passenger car)) and N1 (Power-driven vehicles having at
least four wheels and used for the carriage of goods/ Vehicles used for the carriage of goods and having
a maximum mass not exceeding 3.5 tonnes. (Pick-up Truck, Van))
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3.14
minimum set of data
standardized data concept comprising data elements of relevant vehicle generated data essential for the
performance of the eCall service
[SOURCE: EN 15722:2015]
3.15
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
3.16
SIP header
component of a SIP message that conveys information about the message
4 Symbols and abbreviations
3GPP 3rd Generation Partnership Project
APDU Application Protocol Data Unit
API Application Program Interface
CCH Control Channel
CDMA 2000 code-division multiple access version of IMT-2000 standard
CI Communication Interface, (see ISO 21218)
C-ITS-SU Central Intelligent Transport System-Station Unit
CN Communication Network
CS Circuit Switched
CSP Communication Service Parameters
DOCSYS Data Over Cable Service Interface Specification
DVB-RCS2 Digital Video Broadcasting - Return Channel via Satellite or (Return channel over
system)
EN European Norm
ETSI European Telecommunications Standards Institut
E-UTRAN Evolved Universal Terrestrial Radio Access Network
FA-SAP Service access point between ITS-S facilities layer and ITS-S application entity
FNTP Fast Networking and Transport-layer Protocol
FSAM Fast Service Advertisement Message
FSAP Fast Service Advertisement Protocol
FSRM Fast Service Response Message
GERAN GSM EDGE Radio Access Network
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GNSS Global Navigation Satellite System
GSM Global System Mobile
HLAP High Level Application Protocols
IETF Internet Engineering Task Force
IMS Internet Protocol Multimedia Subsystem
IN-SAP Service access point between ITS-S access layer and ITS-S networking and transport
layer
IP Internet Protocol
ITS Intelligent Transport Systems
ITS-AID ITS Application Identifier
ITS-SAPID ITS S application process identifer
ITS-SAPIID ITS-S application process instance identifer
ITS-SAPSSID ITS-S application process sink source identifier
ITS-SCU-ID ITS station communication unit identifier
ITS-SU Intelligent Transport Systems-Station Unit
LTE Long Term Evolution
MF-SAP Service access point between ITS-S management entity and ITS-S networking and
transport layer
MI-SAP Service access point between ITS-S management entity and ITS-S access layer
MNO Mobile Network Operator
MN-SAP Service access point between ITS-S management entity and ITS-S networking and
transport layer
MSD Minimum Set of Data
n.a. not applicable
NF-SAP Service access point between ITS-S networking and transport layer and ITS-S
facilities layer
PARES Public Authority responsible for Emergency Services
PLMN Public Land Mobile Network
PS Packet Switched
PSAP Public Safety Answering Point
R-ITS-SU Roadside ITS Station Unit
Rx Receive
SAM Service Advertisement Message
SIP Session Initiation Protocol
SIP-BYE SIP- BYE is a request used to terminate a specific session or attempted session
TCP Transmission Control Protocol
TS Technical Specification
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Tx Transmit
UMTS Universal Mobile Telecommunications Service
UNECE United Nations Economic Commission for Europe
URI Uniform Resource Identifier
URL Uniform Resource Locator
URN Uniform Resource Name
UTRAN Universal Terrestrial Radio Access Network
V-ITS-SU Vehicle-Intelligent Transport System-System Unit
VoIP Voice over Internet Protocol
V-to-x Vehicle-to-any compatible transceiver
WiFi “Wireless Fidelity”; wireless networking technology that allows computers and
other devices to communicate over a wireless signal
WIMAX Worldwide Interoperability for Microwave Access
5 Conformance
This Technical Specification makes no conformance specifications or requirements in respect of TPS
eCall operating requirements which can be found in EN 16102 [6]. Conformance requirements for eCall
applicable for this Technical Specification are to be found in CEN/TS 17240 in respect of packet
switched eCall, and in EN 16454:2015 in respect of circuit switched eCall.
6 General overview of the eCall session for 112-European eCall via an ISO 21217
compliant ITS station unit
6.1 Pan European eCall
In the introduction to EN 16072:2015, eCall is described as:
“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 (PSAP).”
A Minimum set of data (3.14) (MSD) to be provided to the PSAP in the eCall message is specified in
EN 15722:2015.
6.2 eCall via circuit switched networks
In ETSI/3GPP circuit switched networks the eCall is identified as ‘an emergency call with a specific
service category’. The long number is not dialled as the teleservice identifiers inform the mobile
network operator (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, GSM/UMTS eCall then
mutes microphones and speakers and uses a modem to transfer the MSD to the PSAP by sending
acoustic data down the voice channel, before opening up the line to enable conversation between the
PSAP operator and the occupants of the vehicle (see EN 16062:2015)
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The high level paradigm for eCall via an ITS-station remains unchanged, and the provision of this
service using a circuit teleservice supported by a Public Land Mobile Network (PLMN) (Teleservice
12/TS12) ETSI TS 122 003, will remain operational and viable for many years – indeed for as long as
GSM/UMTS PLMNs are available.
6.3 eCall using SIP and IMS (IMS-eCall)
Technology advances, and subsequent to the development of the eCall application (3.4) suite
EN 16072:2015, EN 16062:2015 and EN 16454:2015 standards, packet switched networks have
become available, and over the course of time, these packet switched networks (such as LTE/4G/E-
UTRAN) are expected to provide new PLMNs to complement and eventually replace the circuit switched
GSM/UMTS networks.
In a packet switched IMS environment, the eCall is established as an internet protocol based session
with the exchange of packets of data (which in this case, are largely packets of voice data), and the MSD
is provided as part of the session establishment, i.e. included in a header of the session initiation
protocol (SIP).
The SIP was selected as the signalling mechanism for IMS, thereby allowing voice, text and multimedia
services to traverse all
...
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