ISO 20530-1:2020

INTERNATIONAL ISO
STANDARD 20530-1
First edition
2020-12
Intelligent transport systems —
Information for emergency service
support via personal ITS station —
Part 1:
General requirements and technical
definition
Systèmes de transport intelligents — Informations pour le support
des services d'urgence par l'intermédiaire d'une station ITS
personnelle —
Partie 1: Exigences générales et définition technique
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 3
5 General information . 3
6 Use case implementation . 3
6.1 Use case clusters and associated use cases . 3
6.2 Use case implementation . 4
6.2.1 UC cluster 1 — Impact detection . 4
6.2.2 UC cluster 2 — Accident determination . 5
7 Data eXchange messages definitions . 7
7.1 General . 7
7.2 impact-detection . 8
7.3 vehicle-speed . 9
7.4 airbag-deployment-check .10
7.5 roll-over-check .11
7.6 send-accident-data .12
Annex A (normative) Data Type .13
Annex B (normative) Code list .16
Bibliography .17
Foreword
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iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport.
A list of all parts in the ISO 20530 series can be found on the ISO website.
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iv © ISO 2020 – All rights reserved

Introduction
The existing standard on emergency call services (EN 16072) excludes the accident detecting process
and focuses on the automotive manufacturer’s perspective. In order for emergency call services to be
widespread in the automotive industry, a unified system requirement and methodology for accident
data gathering and data processing are necessary.
In terms of an accident detection system, the existing emergency call services assess an accident by
checking solely impact data. However, impact occurrence from a non-accident incident, such as crossing
a speed hump and/or pothole, can be determined as an accident, which can generate a false report. This
false report can cause waste of labour, time and expense for eCall service centres (e.g. PSAP [Public
Safety Answering Point]). Therefore, it is necessary to define an accident detection process to identify
an accident while filtering a false report.
INTERNATIONAL STANDARD ISO 20530-1:2020(E)
Intelligent transport systems — Information for
emergency service support via personal ITS station —
Part 1:
General requirements and technical definition
1 Scope
This document defines the use cases and general requirements for supporting emergency services
via P-ITS-S. Any automotive-related service providers can refer to this document for developing eCall
service systems into eCall non-supportive vehicles.
The P-ITS-S acts as a monitoring and data transmitting device which gathers a vehicle’s speed, impact
and airbag deployment signal to assess the accident occurrence and type of accident. Once gathered data
has been determined as an accident, accident related information is sent to an emergency service centre.
Only notable events, such as an airbag-deployed event, rollover and stationary accident, are concerned
by this document. In addition, the vehicle data gathering device requirement and implementation
methodology for the emergency service are not applicable to this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 13185-2, Intelligent transport systems — Vehicle interface for provisioning and support of ITS
services — Part 2: Unified gateway protocol (UGP) requirements and specification for vehicle ITS station
gateway (V-ITS-SG) interface
ISO 13185-3, Intelligent transport systems  — Vehicle interface for provisioning and support of ITS
Services — Part 3: Unified vehicle interface protocol (UVIP) server and client API specification
ISO 21217, Intelligent transport systems  — Communications access for land mobiles (CALM) — Architecture
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13185-2, ISO 13185-3,
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
accident determination
judgement of whether an event is a real accident or not, following an analysis based on gathered data
3.2
G-sensor
sensor module that detects impact by measuring acceleration change
3.3
gyro sensor
angular rate sensor in roll and pitch axis
3.4
ITS station
ITS-S
entity in a communication network, comprised of application, facilities, networking and access layer
components specified in ISO 21217 that operate within a bounded secure management domain
[SOURCE: ISO 13184-2:2016, 3.5]
3.5
personal/vehicle ITS station
P/V-ITS-S
ITS station implemented in a vehicle or mobile device
[SOURCE: ISO 17438-4:2019, 3.1.4]
3.6
stationary vehicle accident
accident where a stopped vehicle is struck by a moving vehicle
3.7
accident detection system
system which runs a process for determining accident occurrence based on the data gathered from
a P-ITS-S
3.8
accident data
data relevant to an accident
Note 1 to entry: An example is impact and rollover magnitude gathered during an accident (i.e. vehicle speed,
impact magnitude, airbag deployment signal [3.9], angular rate). These data are evaluated for an accident
determination (3.1) process.
3.9
airbag deployment signal
ECU signal for airbag deployment during an accident which is gathered from the UVIP server (3.10)
3.10
UVIP server
server implementing the UVIP services
3.11
preset threshold
specified maximum value of impact magnitude which triggers the further accident determination
(3.1) process
Note 1 to entry: Determining impact threshold value is out of scope of this document.
3.12
emergency service centre
response centre to which accident information is sent
2 © ISO 2020 – All rights reserved

4 Abbreviated terms
ECU electronic control unit
UVIP unified vehicle interface protocol
ITS intelligent transport system
5 General information
This document specifies the general requirements for the accident detection system via P-ITS-S. It
contains information on the following:
— accident detection system structure;
— requirements for impact detection;
— accident determination process by accident case (airbag deployed/rollover/stationary).
The accident detection system consists of the UVIP server, which is a part of an in-vehicle system and a
P-ITS-S. The role of a P-ITS-S is to gather accident data from the UVIP server, to analyse this data, and
send the location of the accident detected to the emergency service centre.
The accident detection system implementation method differs according to G-sensor availability within
a vehicle. Whether there is an in-vehicle or P-ITS-S G-sensor, impact data is gathered and sent to the
P-ITS-S for the further accident determination process.
The accident determination process differs according to the accident case (e.g. airbag-deployed, rollover
and stationary) as well as the required data. Required data is covered in use case cluster 2. Figure 1
shows the accident detection reference system.
Figure 1 — Accident detection reference system
6 Use case implementation
6.1 Use case clusters and associated use cases
In general, a vehicle accident generates considerable impact along with sudden deceleration, rapid
RPM dro
...