ISO/TR 21735:2019

Intelligent transport systems - Framework architecture for plug and play (PnP) functionality in vehicles utilizing nomadic devices

This document defines framework architecture for plug and play (PnP) vehicles and identifies the issues related to exchanging information between occupants (users) and PnP vehicles with nomadic devices. The purpose of architecture is to enhance PnP vehicles and the occupants' safety state by exchanging the information/availability from PnP vehicles and occupants' information/status. The function of frame architecture is to define message follows and its effect on safety state between a PnP vehicle and the occupants. This document specifies the framework of safety state representation between the PnP vehicle and the occupants. The state of the PnP vehicle depending on the PnP vehicle's equipment informs the occupants, and the status of the occupants is also transmitted to the PnP vehicle where status information is delivered by nomadic devices.

Titre manque

General Information

• Status: Published
• Publication Date: 15-Jul-2019
• ICS: 35.240.60 - IT applications in transport
• ICS: 43.040.15 - Car informatics. On board computer systems
• Technical Committee: ISO/TC 204 - Intelligent transport systems
• Drafting Committee: ISO/TC 204/WG 17 - Nomadic Devices in ITS Systems
• Current Stage: 6060 - International Standard published
• Start Date: 16-Jul-2019
• Completion Date: 13-Dec-2025

Overview

ISO/TR 21735:2019 - "Intelligent transport systems - Framework architecture for plug and play (PnP) functionality in vehicles utilizing nomadic devices" - defines a framework architecture and information-exchange model for vehicles that support plug-and-play (PnP) devices. The technical report addresses bidirectional communication between a PnP vehicle and occupants’ nomadic devices (e.g., smartphones, wearables), with the primary goal of improving occupant convenience and the vehicle/occupant safety state by sharing device, sensor and occupant status.

Key topics and technical requirements

• Framework architecture for in‑vehicle PnP
  • A PnP layer/gateway abstracts hardware (sensors, actuators, communication modules) from applications to allow attaching, switching and updating devices before and after market.
• Information representation
  • Defines representation of vehicle safety/availability states and occupant status (driver info, health, authentication).
• Information transmission logic
  • Bidirectional flows: vehicle → nomadic device (device status, sensor data, communication capability) and occupant → vehicle (identification, input, health/status).
  • Periodic monitoring and event-driven updates via the PnP gateway.
• Device classes covered
  • Sensors (radar, lidar, camera), mechanical systems (steering, braking, ECUs), and communication devices (WLAN, Bluetooth, V2X).
• Safety-state effects
  • How changes in device availability or occupant condition affect vehicle safety state and automated responses.
• Use cases (illustrative)
  • Acceptance/denial of service usage, ownership exchange, suggesting an optimum functional package, and mandatory operation of functional packages.

Practical applications and users

Who benefits:

• Automotive OEMs and tier‑1 suppliers - designing modular vehicle platforms that support after‑market upgrades and flexible feature sets.
• Software and app developers - building nomadic-device applications that report occupant state and present vehicle capabilities to users.
• System integrators and cybersecurity teams - implementing secure PnP gateways and safe message flows between devices and occupants.
• Regulators and safety engineers - assessing how device changes impact vehicle safety state and human‑vehicle interaction.

Practical uses:

• Rapid prototyping of new sensor-based functions without deep rework of vehicle software.
• Personalization: nomadic device transmits driver preferences and health status to adapt vehicle behavior.
• After-market upgrades: swapping sensors or communication modules while preserving interoperability and safety signaling.

Related standards

• ISO 17419 - Globally unique identification (referenced)
• ISO 17423 - Cooperative systems application requirements (referenced)
• ISO 21217 - CALM communications architecture (referenced)

Keywords: ISO/TR 21735:2019, plug and play, PnP vehicle, nomadic devices, intelligent transport systems, vehicle architecture, in-vehicle PnP, vehicle-occupant communication, safety state, vehicle sensors.

Standards Content (Sample)

TECHNICAL ISO/TR
REPORT 21735
First edition
2019-07
Intelligent transport systems —
Framework architecture for plug and
play (PnP) functionality in vehicles
utilizing nomadic devices
Reference number
©
ISO 2019
© ISO 2019
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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Conventions . 2
6 Technical information . 2
6.1 General descriptions . 2
6.2 Framework architecture for in-vehicle PnP . 3
6.3 Information transmission logic . 3
6.4 Information from a PNP vehicle to occupants . 4
6.4.1 General. 4
6.4.2 Sensor related information . 4
6.4.3 Communication related information . 5
6.4.4 Mechanical related information . 5
6.5 Information from occupant to PnP vehicle . 5
6.5.1 General. 5
6.5.2 Occupants’ information . . 5
7 Use case scenario . 5
7.1 Use case 1 — Acceptance and denial of service usage . 6
7.1.1 Overview . 6
7.1.2 Description . . . 6
7.1.3 Example . 6
7.2 Use case 2 — Ownership exchanging . 7
7.2.1 Overview . 7
7.2.2 Description . . . 7
7.2.3 Example . 8
7.3 Use case 3 — Suggestion of optimum functional package . 8
7.3.1 Overview . 8
7.3.2 Description . . . 8
7.3.3 Example . 8
7.4 Use case 4 — Mandatory operation of functional package . 8
7.4.1 Overview . 8
7.4.2 Description . . . 8
7.4.3 Example . 9
Bibliography .10
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 systems.
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 2019 – All rights reserved

Introduction
This document specifies framework architecture for plug and play (PnP) functionality in vehicles and
identifies the issues related to exchanging information between occupants (users) and PnP functions.
The connection between PnP vehicles and occupants is established by nomadic devices and the
exchanging information is bidirectional. The main purpose of architecture is to utilize the PnP vehicle
information and enhance the safety state and improve the convenience of occupants in PnP vehicles by
adopting various pieces of information of PnP functionality in vehicles including sensors, mechanical
equipment, and communication devices.
This document covers subjects related to representation of the status of a PnP vehicle and occupant.
The status of a PnP vehicle and occupant is represented as a safety state/availability state and driver
information, respectively. Therefore, information exchange between a PnP vehicle and occupants is
mandatory.
This system is based on the following assumptions:
— A PnP vehicle is equipped with several sensors such as radar, lidar, camera, vehicle mechanical
information such as steering, acceleration/brake, ECU, and communication devices such as WLAN,
Bluetooth. In addition, more sensors or devices can be extensible with the advance of technology,
and a PnP vehicle can adapt these devices.
— Occupants have a nomadic device such as smart phone, or wearable which can be used to exchange
information with a PnP vehicle. The health information of occupants may be delivered to a PnP
vehicle.
— The major use case is to inform the status of a PnP vehicle and occupants using the information
between a PnP vehicle and occupants.
TECHNICAL REPORT ISO/TR 21735:2019(E)
Intelligent transport systems — Framework architecture
for plug and play (PnP) functionality in vehicles utilizing
nomadic devices
1 Scope
This document defines framework architecture for plug and play (PnP) vehicles and identifies the issues
related to exchanging information between occupants (users) and PnP vehicles with nomadic devices.
The purpose of architecture is to enhance PnP vehicles and the occupants’ safety state by exchanging
the information/availability from PnP vehicles and occupants’ information/status.
The function of frame architecture is to define message follows and its effect on safety state between a
PnP vehicle and the occupants. This document specifies the framework of safety state representation
between the PnP vehicle and the occupants. The state of the PnP vehicle depending on the PnP vehicle’s
equipment informs the occupants, and the status of the occupants is also transmitted to the PnP vehicle
where status information is delivered by nomadic devices.
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 17419, Intelligent transport systems — Cooperative systems — Globally unique identification
ISO 17423, Intelligent transport systems — Cooperative systems — Application requirements and objectives
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 17419, ISO 17423 and
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
plug and play
PnP
vehicle which allows attaching, switching and detaching devices, e.g. sensors, actuators or
communication devices, in the vehicle at both before and after market, and then the various applications
can be implemented using a specific function
Note 1 to entry: Plug and play is a next generation ITS concept.
Note 2 to entry: The information from the PnP function can be monitored and controlled by nomadic devices. It
could be a chance to produce small and special batches by small manufacturers, and to keep continuous value
improvement of the vehicle by switching devices to improved ones as modern desktop computers do.
3.2
plug and play v
...