ISO/IEC 10192-4-2:2024

Information technology - Home Electronic System (HES) interfaces - Part 4-2: Common user interface and cluster-to-cluster interface to support interworking among home cluster systems - Interfaces, services and objects

ISO/IEC 10192-4-2:2024 specifies a control architecture, user interface, and service objects in the HES gateway to enable interworking among home cluster systems and interoperability among the applications supported by these cluster systems. The ISO/IEC 10192 series specifies a common user interface to these cluster-system applications. This common user interface provides input and output methods for user information exchange to access, monitor, control and coordinate applications running on home cluster systems.
This document specifies the application object, service and interface modules from the interoperability standard (ISO/IEC 18012 series) necessary for interworking and incorporation of these modules in the HES gateway (ISO/IEC 15045 series).

General Information

• Status: Published
• Publication Date: 11-Sep-2024
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Drafting Committee: WG 1 - ISO/IEC JTC 1/SC 25/WG 1
• Current Stage: PPUB - Publication issued
• Start Date: 12-Sep-2024
• Completion Date: 04-Oct-2024

Overview

ISO/IEC 10192-4-2:2024 - part of the ISO/IEC 10192 Home Electronic System (HES) interfaces series - specifies the common user interface (CUI) and cluster-to-cluster (C2C) interfaces, services and objects required to enable interworking among home cluster systems. The standard defines a control architecture, application objects and service/interface modules to be incorporated into an HES gateway so that multiple heterogeneous home clusters (lighting, HVAC, safety, audio/video, etc.) can interoperate and present a unified user experience without requiring Internet dependency.

Key technical topics and requirements

• CUI architecture and components: Defines options for embedding a common user interface in clusters, as separate devices, or as service modules to provide consistent input/output methods across cluster applications.
• CUI operational information: Specifies composition, delivery, translation to interactive media (visual, touch, voice), selection logic and synchronization of user devices.
• C2C secure connection: Describes secure connectivity patterns (e.g., TLS-based channels) and requirements for establishing trusted cluster-to-cluster links via the HES gateway.
• C2C authorization and identity federation: Covers user identity federation, authorization procedures and mappings (correlation to OAuth 2.0 roles is noted) to control cross-cluster access and delegation.
• Interworking services and objects: Identifies required application objects, interface modules and services derived from the ISO/IEC 18012 interoperability series to enable device-to-device collaboration.
• ISEE group and service roles: Defines C2C interworking application components such as authorization controller/processor and C2C controller/processor services plus HAN interface modules.
• Security, privacy and safety: Includes considerations and requirements for protecting user data, system safety (e.g., emergency scenarios) and secure operation of inter-cluster actions.

Practical applications and users

Who benefits:

• HES gateway vendors implementing ISO/IEC 15045-compatible gateways to mediate different home area networks (HANs) and protocols.
• Home automation platform developers building unified control apps and CUI services that integrate multi-vendor clusters.
• Device manufacturers seeking interoperability paths so their cluster devices can collaborate with external clusters.
• System integrators and installers deploying multi-cluster smart homes that require consistent user interaction and cross-cluster automation.
• Security architects and compliance teams ensuring authorization, identity federation and safe failover during emergencies (e.g., fire detection → lighting/speakers/HVAC coordination).

Example use case: a fire-detection cluster triggers lighting scenes, broadcasts evacuation announcements on audio clusters, shuts HVAC blowers and calls emergency services - achieved through the C2C interworking and CUI services defined in ISO/IEC 10192-4-2.

Related standards (for implementation)

• ISO/IEC 10192 series (Parts 4-1: Architecture; 4-3: Messaging)
• ISO/IEC 15045 series (HES gateway)
• ISO/IEC 18012 series (interoperability objects and services)
• Common protocols referenced for security/authorization (e.g., TLS, OAuth 2.0 mappings)

Keywords: ISO/IEC 10192-4-2, Home Electronic System, HES gateway, common user interface, cluster-to-cluster interworking, home automation interoperability, CUI, C2C authorization, identity federation.

Standards Content (Sample)

ISO/IEC 10192-4-2
Edition 1.0 2024-08
INTERNATIONAL
STANDARD
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Information technology – Home Electronic System (HES) interfaces –
Part 4-2: Common user interface and cluster-to-cluster interface to support
interworking among home cluster systems – Interfaces, services and objects

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ISO/IEC 10192-4-2
Edition 1.0 2024-09
INTERNATIONAL
STANDARD
colour
inside
Information technology – Home Electronic System (HES) interfaces –

Part 4-2: Common user interface and cluster-to-cluster interface to support

interworking among home cluster systems – Interfaces, services and objects

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.200 ISBN 978-2-8322-9665-3

– 2 – ISO/IEC 10192-4-2:2024
© ISO/IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 10
4 Conformance . 11
5 HES components for common user interface . 11
6 Common user interface . 13
7 CUI operational information . 13
7.1 Usage . 13
7.2 CUI operational information composition . 15
7.3 Delivery of CUI operational information . 15
7.4 Interoperability of heterogeneous CUI operational information . 16
7.5 CUI selection and resultant actions for handling devices . 16
7.5.1 General . 16
7.5.2 Acquisition of user's set of devices . 17
7.5.3 Synchronization of user devices . 17
7.5.4 Handling of request and response for user devices . 17
8 Secure C2C connection . 17
9 C2C authorization . 18
9.1 General . 18
9.2 User identity federation . 18
9.3 C2C authorization procedure . 21
10 C2C interface . 22
11 CUI service . 22
12 C2C interworking application ISEE group . 22
12.1 General . 22
12.2 C2C authorization controller service. 23
12.3 C2C authorization processor service . 23
12.4 C2C controller service . 23
12.5 C2C processor service . 24
12.6 Other services . 24
12.7 HAN interface module . 25
13 Privacy, security, and safety considerations . 25
Bibliography . 26

Figure 1 – Core interoperability and HES standards . 7
Figure 2 – HES gateway applications standards. 7
Figure 3 – CUI components of alternative #1: common user interface in a cluster . 12
Figure 4 – CUI components of alternative #2: common user interface as a separate
device . 12
Figure 5 – CUI components of alternative #3: common user interface in a service
module . 12

© ISO/IEC 2024
Figure 6 – Translation between CUI operational information and interactive media . 13
Figure 7 – Interactive visual and touch media . 14
Figure 8 – Interactive speaker and voice media . 14
Figure 9 – Interoperability of heterogenous CUI systems . 16
Figure 10 – TLS based C2C secure connection . 18
Figure 11 – Configuration of user identities and devices . 19
Figure 12 – Configuration of user identity federation table . 21
Figure 13 – C2C authorization procedure . 22
Figure 14 – Structure of C2C interworking application ISEE group . 23
Figure 15 – Address referencing of binding map service to a device in a cluster . 24

Table 1 – Correlation between roles in OAuth 2.0 and CUI components . 21

– 4 – ISO/IEC 10192-4-2:2024
© ISO/IEC 2024
INFORMATION TECHNOLOGY –
HOME ELECTRONIC SYSTEM (HES) INTERFACES –

Part 4-2: Common user interface and cluster-to-cluster interface
to support interworking among home cluster systems –
Interfaces, services and objects

FOREWORD
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ISO/IEC 10192-4-2 has been prepared by subcommittee 25: Interconnection of information
technology equipment, of ISO/IEC joint technical committee 1: Information technology. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
JTC1-SC25/3221/CDV JTC1-SC25/3263/RVC

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

© ISO/IEC 2024
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1, and the ISO/IEC Directives, JTC 1 Supplement
available at www.iec.ch/members_experts/refdocs and www.iso.org/directives.
A list of all parts in the ISO/IEC 10192 series, published under the general title Information
technology – Home Electronic System (HES) interfaces, can be found on the IEC website.

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– 6 – ISO/IEC 10192-4-2:2024
© ISO/IEC 2024
INTRODUCTION
A home cluster system is implemented by interconnecting several devices to deliver one or
more applications. A cluster can function independently of other clusters. Cluster devices
include sensors, actuators, a controller, and user interfaces. Multiple home cluster systems can
be installed and operated in a single home for the following reasons.
• There are various types of application domains in the home such as lighting, safety, air
conditioning, telecommunications, audio and video, etc. One or more applications are
implemented by the constituents of a cluster. Therefore, if a user purchases several
applications, they will be implemented by one or more home cluster systems.
• Home application vendors usually provide systems implemented in clusters of required
devices. Depending on the user's needs, several application systems, possibly from
different manufacturers, can be installed in a home as separate clusters.
A customer can access the functions provided by a cluster via a user interface associated with
that cluster. With multiple clusters it is important for a user to learn how to operate a range of
different interfaces. This document provides the cluster-to-cluster interworking foundation
necessary for a single common user interface to manage applications in multiple clusters.
Application-to-application and the resulting device-to-device collaboration are essential for
providing integrated services in a multi-device Home Electronic System (HES) environment. For
example, if a fire monitoring system detects a fire, it is important that the indoor lights are turned
on and the fire announcement is broadcast through available speakers in the house for prompt
evacuation of the residents, the ventilation blowers are stopped to avoid spreading the fire, and
the public fire service is contacted. This needs collaboration among fire detectors, indoor lights,
speakers, HVAC and telecommunication devices. If the devices are located in different clusters,
cluster-to-cluster interworking is essential for collaboration among them.
In practice, a safety monitoring cluster can send out a fire-detected message and a lighting
cluster can be ready to activate a lighting scene that alerts the occupant by turning on or flashing
the appropriate lights. However, these two clusters usually do not have a way to communicate
with each other especially if supplied by different manufacturers possibly using different
protocols and messages. This document solves that problem by providing the necessary
interworking and interoperability functionality to ensure that the clusters can work together.
When the cluster systems are in different HANs or use different protocols, interworking is
accomplished using the HES gateway (ISO/IEC 15045 series) and related interoperability
standards (ISO/IEC 18012 series). For interworking between cluster systems using the same
protocols and belonging to the same HAN, HES gateway services can optionally be used if the
cybersecurity, privacy and safety features of the HES gateway are desired. The functions
specified in this document do not require the Internet to operate but can connect to the Internet
if the application requires.
This document specifies the architecture for interworking home cluster systems where
– the home cluster systems use different HANs or protocols, or
– the home cluster systems use the same HANs and protocols plus the services of the HES
gateway.
Figure 1 shows the core interoperability and HES gateway standards. Figure 2 shows the
common user interface series of standards designated ISO/IEC 10192-4, Information
technology – Home Electronic System (HES) interfaces – Common user interface and cluster-
to-cluster interface to support interworking among home cluster systems. ISO/IEC 10192-4
consists of three parts:
Part 4-1: Architecture
Part 4-2: Interfaces, services and objects
Part 4-3: Messaging
© ISO/IEC 2024
Figure 1 – Core interoperability and HES standards

Figure 2 – HES gateway applications standards

– 8 – ISO/IEC 10192-4-2:2024
© ISO/IEC 2024
INFORMATION TECHNOLOGY –
HOME ELECTRONIC SYSTEM (HES) INTERFACES –

Part 4-2: Common user interface and cluster-to-cluster interface
to support interworking among home cluster systems –
Interfaces, services and objects

1 Scope
This part of ISO/IEC 10192 specifies a control architecture, user interface, and service objects
in the HES gateway to enable interworking among home cluster systems and interoperability
among the applications supported by these cluster systems. The ISO/IEC 10192 series
specifies a common user interface to these cluster-system applications. This common user
interface provides input and output methods for user information exchange to access, monitor,
control and coordinate applications running on home cluster systems.
This document specifies the application object, service and interface modules from the
interoperability standard (ISO/IEC 18012 series) necessary for interworking and incorporation
of these modules in the HES gateway (ISO/IEC 15045 series).
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/IEC 10192-4-1, Information technology – Home Electronic System (HES) interfaces –
Part 4-1: Common user interface and cluster-to-cluster interface to support interworking among
home cluster systems – Architecture
ISO/IEC 15045-1, Information technology – Home Electronic System (HES) gateway – Part 1:
A residential gateway model for HES
ISO/IEC 15045-2, Information technology – Home Electronic System (HES) gateway – Part 2:
Modularity and protocol
ISO/IEC 15045-3-1, Information technology – Home Electronic System (HES) gateway –
Part 3-1: Privacy, security, and safety – Introduction
ISO/IEC 15045-3-2, Information technology – Home Electronic System (HES) gateway –
Part 3-2: Privacy, security, and safety – Privacy framework
ISO/IEC 15045-4-1, Information technology – Home Electronic System (HES) gateway –
Part 4-1: Structure – Structural class and module requirements
ISO/IEC 15045-4-2, Information technology – Home Electronic System (HES) gateway –
Part 4-2: Structure – Simple gateway
ISO/IEC 18012-1, Information technology – Home Electronic System (HES) – Guidelines for
product interoperability – Part 1: Introduction

© ISO/IEC 2024
ISO/IEC 18012-2, Information technology – Home Electronic System (HES) – Guidelines for
product interoperability – Part 2: Taxonomy and application interoperability model
ISO/IEC 18012-3, Information technology – Home Electronic System (HES) – Guidelines for
product interoperability – Part 3: Lexicon
ISO/IEC 18012-4, Information technology – Home Electronic System (HES) – Guidelines for
product interoperability – Part 4: Event encoding
3 Terms, definitions, and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology 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
3.1.1
access token
trusted object encapsulating the authority for a subject to access a resource
[SOURCE: ISO/IEC 29146:2016]
3.1.2
cluster controller
functional unit that manages the operation of a home cluster system
3.1.3
C2C interface
interface in a cluster that supports HAN communication for C2C interworking with an HES
gateway by a cluster controller in a home cluster system
[SOURCE: ISO/IEC 10192-4-1:2022, 3.1.1]
3.1.4
C2C interworking
communications among home cluster systems to support coordination among them
3.1.5
common user interface
interface that provides input and output methods for user information exchange to access,
monitor and control applications running on home cluster systems
3.1.6
CUI operational information
local user object and service that enable users to access, monitor, and control applications
running on their home cluster system and to schedule coordination among them
___________
First edition under preparation. Stage at the time of publication: ISO/IEC CDV 18012-3:2024.
First edition under preparation. Stage at the time of publication: ISO/IEC CDV 18012-4:2024.

– 10 – ISO/IEC 10192-4-2:2024
© ISO/IEC 2024
3.1.7
federation
group of entities that have agreed to form a union based on common properties that the entities
can share
3.1.8
home cluster system
set of functional units under common control in a home environment that includes sensors,
actuators, user interfaces, and a cluster controller
[SOURCE: ISO/IEC 10192-4-1:2022, 3.1.3]
3.1.9
ISEE group
group of interface modules, service modules and HES-CLME event encoding to support a
particular application or operation
3.1.10
master CUI C2C interface
C2C interface of a home cluster system that includes CUI user objects that initiate actions on
remote systems
[SOURCE: ISO/IEC 10192-4-1:2022, 3.1.4]
3.1.11
receptive CUI C2C interface
C2C interface of a home cluster system that manipulates the local cluster based upon receipt
of CUI user objects from a remote master CUI
[SOURCE: ISO/IEC 10192-4-1:2022, 3.1.6]
3.1.12
user interface
functional system used specifically to interface the computer-based control system to the
operator, maintenance personnel, or engineer
[SOURCE: IEC 62270:2013, 2.51, modified – In the definition, "engineer, etc." has been
replaced with "or engineer".]
3.2 Abbreviated terms
API application programming interface
C2C cluster to cluster
CUI common user interface
HAN home area network
HES home electronic system
HES-CLME home electronic system – common language messaging exchange
HVAC heating, ventilation, and air conditioning
ID identifier
ISEE interface (e.g. HAN and WAN interface modules), service (e.g. service modules),
and event encoding (e.g. HES-CLME)
SSO single sign-on
TLS transport layer security
© ISO/IEC 2024
4 Conformance
Home cluster systems that claim conformance to this document shall support the common user
interface as specified in this document.
5 HES components for common user interface
The architecture for the common user interface (CUI) shall be one of the three alternatives
specified in ISO/IEC 10192-4-1. The common user interface can be located in a cluster
(alternative #1), a separate device (alternative #2), or a service module (alternative #3) in the
HES gateway. Figure 3 (alternative #1), Figure 4 (alternative #2) and Figure 5 (alternative #3)
show the architecture required to support the common user interface in each alternative. On
the left side of the HES gateway in Figure 3 to Figure 5, there can be multiple home area
networks (HANs) and multiple clusters on one HAN. The architectural models of the HES
gateway shall be as specified in ISO/IEC 15045-1 and ISO/IEC 15045-2, structural classes shall
be as specified in ISO/IEC 15045-4-1 and ISO/IEC 15045-4-2, and product interoperability shall
be as specified in ISO/IEC 18012-1, ISO/IEC 18012-2, ISO/IEC 18012-3 and ISO/IEC 18012-4.
The parts marked with red in Figure 3 to Figure 5 indicate components added to support the
common user interface.
The common user interface enables one local user interface to be used for multiple clusters in
order to access objects and services in the clusters connected with the HES gateway and to
allow collaboration and co-ordination among cluster applications, regardless of cluster type or
manufacturer.
The cluster to cluster (C2C) interface in a cluster or a separate device specifies the transfer of
information and procedures necessary over the HAN to operate other clusters. The C2C
interface is supported by the C2C interworking application ISEE group in the HES gateway.
A cluster (alternative #1) or separate device (alternative #2) having the common user interface
includes a master CUI C2C interface or a master CUI interface, respectively, that initiates CUI
operational information. When the common user interface is implemented in the HES gateway
(alternative #3), the HES gateway includes a service module containing common user interface
service that emits CUI operational information.
A cluster that receives and reacts to CUI operational information includes a receptive CUI C2C
interface. The master CUI C2C interface or the service module of the HES gateway containing
common user interface service initiates the actions to the receptive CUI C2C interface.
The HES gateway includes HAN interface modules, service modules and
...