Intelligent transport systems -- Information for emergency service support via personal ITS station

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.

Systèmes de transport intelligents -- Informations pour le support des services d'urgence par l'intermédiaire d'une station ITS personnelle

General Information

Status
Published
Publication Date
13-Dec-2020
Current Stage
5060 - Close of voting Proof returned by Secretariat
Start Date
14-Nov-2020
Completion Date
13-Nov-2020
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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 20530-1:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 20530-1:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 20530-1:2020(E)
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

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 20530-1:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

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.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 20530-1:2020(E)
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.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
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

© ISO 2020 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO 20530-1:2020(E)
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
---------------------- Page: 7 ----------------------
ISO 20530-1:2020(E)
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 drop, and airbag deployment. This series of data provides a reasonable source of information for

© ISO 2020 – All rights reserved 3
---------------------- Page: 8 ----------------------
ISO 20530-1:2020(E)

identifying accidents and filtering out false detections. In order for the P-ITS-S to detect an accident

properly, the following functionalities are required:

— Exchange of data between the P-ITS-S and the vehicle’s UVIP server and ability to monitor vehicle

status, such as impact and speed in real time.

If an impact is detected which exceeds a preset threshold, then the P-ITS-S shall make a request for

airbag deployment signal check through the UVIP server.

Once impact data has been determined as an accident, the P-ITS-S sends accident related information,

such as time and accident detected location, to the emergency service centre.

Table 1 provides an overview of the different use cases. The use cases are grouped into use case clusters.

Table 1 — Overview of use case clusters and associated use cases
Title of use
Brief description
case cluster

This cluster describes an impact data gathering system which is classified according to

G-sensor availability within a vehicle. If a vehicle doesn’t support G-sensor, then P-ITS-S

1 - Impact
shall act as an impact gathering system.
detection
UC 1.1 - Impact detection using in-vehicle G-sensor
UC 1.2 - Impact detection using P-ITS-S G-sensor

Although there are various accident types, this cluster covers three particular use cases:

airbag-deployed accident (UC 2.1), rollover accident (UC 2.2) and stationary accident (UC

2.3). After the P-ITS-S gathers impact data and checks with a preset threshold, each acci-

2 - Accident dent case shall follow the corresponding accident detection process.

determination
UC 2.1 - Airbag-deployed accident
UC 2.2 - Rollover accident
UC 2.3 - Accident while stopped in traffic
6.2 Use case implementation
6.2.1 UC cluster 1 — Impact detection

The P-ITS-S monitors impact data through G-sensor in real-time and checks whether the impact has

exceeded a preset threshold. Determining a preset impact threshold is not covered in this document.

This use case cluster involves the case where impact is gathered and sent to the P-ITS-S. The role of the

P-ITS-S is differed by G-sensor availability within a vehicle.
6.2.1.1 UC 1.1 Impact detection through in-vehicle G-sensor

Table 2 defines the use case where impact data from G-sensor within a vehicle is gathered. In this use

case, the P-ITS-S which communicates with a UVIP server gathers impact data directly from an in-

vehicle G-sensor in DXMessage format. The UVIP client within the P-ITS-S shall receive impact data

along with an airbag deployment signal and move on to the further process.
4 © ISO 2020 – All rights reserved
---------------------- Page: 9 ----------------------
ISO 20530-1:2020(E)
Table 2 — UC 1.1 Impact detection through in-vehicle G-sensor
Cluster 1 - Impact detection
Detect an impact from in-vehicle G-sensor
UC 1.1 - Impact detection
(UVIP Server)
Name through in-vehicle
G-sensor
Occurrence area Vehicle involved in an accident
Use case
Provisioning phase Check impact data which is gathered from UVIP server
P-ITS-S control Gather impact data
Hindrance factor False impact
Requirements Receive impact data through UVIP server
Subclause Name Exe Description
Messages
Not applicable
6.2.1.2 UC 1.2 Impact detection through P-ITS-S G-sensor

Table 3 defines the use case of using the P-ITS-S acting as an impact gathering entity for an older and

low-end vehicle model which does not have an in-vehicle G-sensor.
In this use case, if
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 20530
ISO/TC 204
Intelligent transport systems —
Secretariat: ANSI
Information for emergency service
Voting begins on:
2020­09­18 support via personal ITS station —
General requirements and technical
Voting terminates on:
2020­11­13
definition
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 20530:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 20530:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH­1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 20530:2020(E)
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 impact­detection ................................................................................................................................................................................... 8

7.3 vehicle­speed ............................................................................................................................................................................................ 9

7.4 airbag-deployment-check ...........................................................................................................................................................10

7.5 roll-over-check .....................................................................................................................................................................................11

7.6 send­accident­data ...........................................................................................................................................................................12

Annex A (normative) Data Type .............................................................................................................................................................................13

Annex B (normative) Code list .................................................................................................................................................................................16

Bibliography .............................................................................................................................................................................................................................17

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 20530:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 204, Intelligent transport.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 20530:2020(E)
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.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 20530:2020(E)
Intelligent transport systems — Information for
emergency service support via personal ITS station —
General requirements and technical definition
1 Scope

This document defines the use cases and general requirements to support 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 vehicle.

The P­ITS­S 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 shall be 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 13185­2, 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 13185­3, 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

© ISO 2020 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO/FDIS 20530:2020(E)
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 P­ITS­S
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
---------------------- Page: 7 ----------------------
ISO/FDIS 20530:2020(E)
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 in­vehicle or P­ITS­S G­sensor, impact data is gathered and sent to the

P­ITS­S 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 drop, and airbag deployment. This series of data provides a reasonable source of information for

© ISO 2020 – All rights reserved 3
---------------------- Page: 8 ----------------------
ISO/FDIS 20530:2020(E)

identifying accidents and filtering out false detections. In order for the P-ITS-S to detect an accident

properly, the following functionalities are required:

— Exchange of data between the P-ITS-S and the vehicle’s UVIP server and ability to monitor vehicle

status, such as impact and speed in real time.

If an impact is detected which exceeds a preset threshold, then the P-ITS-S shall make a request for

airbag deployment signal check through the UVIP server.

Once impact data has been determined as an accident, the P­ITS­S sends accident related information,

such as time and accident detected location, to the emergency service centre.

Table 1 provides an overview of the different use cases. The use cases are grouped into use case clusters.

Table 1 — Overview of use case clusters and associated use cases
Title of use
Brief description
case cluster

This cluster describes an impact data gathering system which is classified according to

G-sensor availability within a vehicle. If a vehicle doesn’t support G-sensor, then P-ITS-S

1 ­ Impact
shall act as an impact gathering system.
detection
UC 1.1 ­ Impact detection using in­vehicle G­sensor
UC 1.2 ­ Impact detection using P­ITS­S G­sensor

Although there are various accident types, this cluster covers three particular use cases:

airbag-deployed accident (UC 2.1), rollover accident (UC 2.2) and stationary accident (UC

2.3). After the P-ITS-S gathers impact data and checks with a preset threshold, each acci­

2 ­ Accident dent case shall follow the corresponding accident detection process.

determination
UC 2.1 - Airbag-deployed accident
UC 2.2 ­ Rollover accident
UC 2.3 - Accident while stopped in traffic
6.2 Use case implementation
6.2.1 UC cluster 1 — Impact detection

The P-ITS-S monitors impact data through G-sensor in real-time and checks whether the impact has

exceeded a preset threshold. Determining a preset impact threshold is not covered in this document.

This use case cluster involves the case where impact is gathered and sent to the P­ITS­S. The role of the

P-ITS-S is differed by G-sensor availability within a vehicle.
6.2.1.1 UC 1.1 Impact detection through in-vehicle G-sensor

Table 2 defines the use case where impact data from G-sensor within a vehicle is gathered. In this use

case, the P-ITS-S which communicates with a UVIP server gathers impact data directly from an in-

vehicle G­sensor in DXMessage format. The UVIP client within the P­ITS­S shall receive impact data

along with an airbag deployment signal and move on to the further process.
4 © ISO 2020 – All rights reserved
---------------------- Page: 9 ----------------------
ISO/FDIS 20530:2020(E)
Table 2 — UC 1.1 Impact detection through in-vehicle G-sensor
Cluster 1 - Impact detection
Detect an impact from in­vehicle G­sensor
UC 1.1 - Impact detection
(UVIP Server)
Name through in-vehicle
G-sensor
Occurrence area Vehicle involved in an accident
Use case
Provisioning phase Check impact data which is gathered from UVIP server
P-ITS-S control Gather impact data
Hindrance factor False impact
Requirements Receive impact data through UVIP server
Subclause Name Exe Description
Messages
Not applicable
6.2.1.2 UC 1.2 Impact detection through P-ITS-S G-sensor
Table 3 defines the use case of using the P-ITS-S
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