ISO/IEC TR 14543-3:2000

Information technology - Home Electronic Systems (HES) architecture - Part 3: Communication layers

Describes the architecture of a standardised home control system, called the Home Electronic System, HES. Discusses the communication and interoperability aspects of HES. Uses the Open Systems Interconnection (OSI) model, or more precisely: the layering principles borrowed from OSI. Hence the HES reference model defines the modular (layered) structure of the HES communication protocol. The detailed issues of addressing and application protocols for the Home Electronic System of different classes will be given in related standards.

General Information

• Status: Replaced
• Publication Date: 24-May-2000
• ICS: 35.240.67 - IT applications in building and construction industry
• Technical Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Current Stage: DELPUB - Deleted Publication
• Start Date: 25-May-2000
• Completion Date: 13-Feb-2026

Relations

• Replaced By: ISO/IEC 14543-3-1:2006 - Information technology - Home electronic system (HES) architecture - Part 3-1: Communication layers - Application layer for network based control of HES Class 1
• Effective Date: 05-Sep-2023
• Replaced By: ISO/IEC 14543-3-2:2006 - Information technology - Home electronic system (HES) architecture - Part 3-2: Communication layers - Transport, network and general parts of data link layer for network based control of HES Class 1
• Effective Date: 05-Sep-2023

Standards Content (Sample)

ISO/IEC TR 14543-3
Edition 1.0 2000-05
TECHNICAL
REPORT
Information technology – Home electronic system (HES) architecture –
Part 3: Communication layers
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ISO/IEC TR 14543-3
Edition 1.0 2000-05
TECHNICAL
REPORT
Information technology – Home electronic system (HES) architecture –

Part 3: Communication layers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.240.67 ISBN 2-8318-5252-8

– 2 – TR 14543-3 © ISO/IEC:2000(E)

CONTENTS
Page
FOREWORD . 3

Clause
1 Scope . 5

2 Reference documents . 5

3 Definitions. 5

3.1 Basic reference model definitions . 5
3.2 Definitions from ISO/IEC 2382-25 . 6
3.3 Definitions from ISO/IEC 2382-26 . 6
3.4 Definitions from the HES terminology. 6
4 HES reference model. 6
4.1 General. 6
4.2 HES Communication model. 8
4.2.1 Physical Layer . 8
4.2.2 Data Link Layer. 8
4.2.3 Network Layer. 9
4.2.4 Transport Layer . 9
4.2.5 Session Layer . 9
4.2.6 Presentation Layer. 9
4.2.7 Application Layer . 9
4.3 HES application model. 10
4.4 HES Management model . 13
4.4.1 HES system management . 13
4.4.2 HES application management . 15
5 Classes. 16

TR 14543-3 © ISO/IEC:2000(E) – 3 –

INFORMATION TECHNOLOGY –
HOME ELECTRONIC SYSTEMS (HES) ARCHITECTURE –

Part 3: Communication Layers
FOREWORD
1) ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission)

form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC
participate in the development of International Standards through technical committees established by the
respective organization to deal with particular fields of technical activity. ISO and IEC technical committees
collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in
liaison with ISO and IEC, also take part in the work.
2) In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC1.
Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote.
3) Attention is drawn to the possibility that some of the elements of this Technical Report may be the subject of
patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC and ISO technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
report of one of the following types:
• type 1, when the required support cannot be obtained for the publication of an International
Standard, despite repeated efforts;
• type 2, when the subject is still under technical development or where for any other reason
there is the future but not immediate possibility of an agreement on an International
Standard;
• type 3, when the technical committee has collected data of a different kind from that which
is normally published as an International Standard, for example ‘state of the art’.
Technical reports of types 1 and 2 are subject to review within three years of publication to
decide whether they can be transformed into International Standards. Technical reports of
type 3 do not necessarily have to be reviewed until the data they provide are considered to be
no longer valid or useful.
ISO/IEC 14543-3, which is a technical report of type 2, was prepared by subcommittee 25:

Interconnection of information technology equipment, of ISO/IEC joint technical committee 1:
Information technology.
International Standards are drafted in accordance with ISO/IEC Directives, Part 3.
This document is issued in the type 2 technical report series of publications (according to
15.2.2 of the Procedures for the technical work of ISO/IEC JTC1 (1998)) as a prospective
standard for provisional application in the field of Home Electronic Systems (HES)
architecture, because there is an urgent requirement for guidance on how standards in this
field should be used to meet an identified need.
This document is not to be regarded as an “International Standard”. It is proposed for provi-
sional application so that information and experience of its use in practice may be gathered.
Comments on the content of this document should be sent to the IEC Central Office.

– 4 – TR 14543-3 © ISO/IEC:2000(E)

A review of this type 2 technical report will be carried out not later than three years after its
publication with the options of extension for a further three years of conversion either to an

International Standard or withdrawal.

ISO/IEC 14543 consists of the following parts, under the general title Information technology –

Home elecronic systems (HES) architecture:

– Part 1: Introduction
– Part 2: Device modularity
– Part 3: Communication layers

Additional parts are under consideration.

TR 14543-3 © ISO/IEC:2000(E) – 5 –

INFORMATION TECHNOLOGY –
HOME ELECTRONIC SYSTEMS (HES) ARCHITECTURE –

Part 3: Communication Layers
1 Scope
This part of ISO/IEC 14543 describes the architecture of a standardised home control system,
called the Home Electronic System, HES.
It discusses the communication and interoperability aspects of HES. It uses the Open
Systems Interconnection (OSI) model, or more precisely: the layering principles borrowed
from OSI. Hence the HES reference model defines the modular (layered) structure of the HES
communication protocol.
The detailed issues of addressing and application protocols for the Home Electronic System
of different classes will be given in related standards.
NOTE The concept of Functional Groupings (FG) and Reference Points (RP) provides a means to model device
modularity, and hence provides a basis for devide interface standards. This is dealt with in ISO/IEC TR 14543-2
(under preparation).
2 Reference documents
ISO/IEC 2382-25:1992, Information technology – Vocabulary – Part 25: Local Area Networks
ISO/IEC 2382-26:1993, Information technology – Vocabulary – Part 26: Open Systems
Interconnection
ISO/IEC 7498-1:1994, Information technology – Open Systems Interconnection – Basic
Reference Model: The Basic Model
ISO 7498-2:1989, Information processing systems – Open Systems Interconnection – Basic
Reference Model – Part 2: Security Architecture
ISO/IEC 7498-3:1997, Information technology – Open Systems Interconnection – Basic
Reference Model: Naming and addressing

ISO/IEC 7498-4:1989, Information processing systems – Open Systems Interconnection –
Basic Reference Model – Part 4: Management framework
ISO/IEC TR 15044: Information technology – Terminology for Home Electronic System (HES)
3 Definitions
For the purpose of this part of ISO/IEC TR 14543, the following definitions apply.
3.1 Basic reference model definitions
The following terms are defined in ISO/IEC 7498-1:
(N)-entity
(N)-service-data-unit
– 6 – TR 14543-3 © ISO/IEC:2000(E)

(N)-protocol-data-unit
application-entity
application-process
connection-mode transmission
connectionless-mode transmission

segmenting
reassembling
3.2 Definitions from ISO/IEC 2382-25

The following terms are defined in ISO/IEC 2382-25:
bridge
repeater
router
3.3 Definitions from ISO/IEC 2382-26
The following terms are defined in ISO/IEC 2382-26:
application service element
3.4 Definitions from the HES terminology
This technical report uses terms defined in ISO/IEC TR 15044.
4 HES reference model
4.1 General
The HES model is based on the OSI reference model. Because the requirements of HES are
more specific than those of OSI, and also for reasons of protocol efficiency, some of the
layers of the OSI reference model are null or have reduced functionality in the HES reference
model. In particular, some implementations have little or no functionality at one or more of the
layers: transport, session and presentation. If a layer has no functionality of its own, then it is
still regarded as present, merely to map between the layer below and the layer above. Null
layers impose no overhead on any implementation.
The OSI layered reference model defines a framework for functional requirements for

interconnection of systems. It does explicitly not deal with: interworking (which is an
application concept and hence by definition beyond the OSI domain whereas this is included
in the HES reference model), nor with implementation, interfaces or modularity. The major
concepts introduced and defined in the OSI model are layer, service, and protocol. The rich
functionality of the full OSI model is not needed in the relatively simple case of home
automation, therefore only a subset of the OSI model is used to construct the HES reference
model. On the other hand the OSI model does not deal with real time signals, nor with
switched circuit transmission channels as defined for HES Class 2 and 3. Therefore the OSI
model needs to be extended to address HES Class 2 and 3 services (see Figure 1).

TR 14543-3 © ISO/IEC:2000(E) – 7 –

Figure 1 – Real time signals, switched channel domain

This method to construct the HES reference model is purely communication oriented. Since
HES reference model also addresses network management and distributed processing in the
application domain, it is also interoperability oriented.
Figure 2 depicts the overall structure of the HES reference model. An HES implementation
consists of a control channel and optionally one or more information channels. Note that the
control channel and information channel or channels may be on the same or different media
(which may be of different types).
As shown in Figure 2 the HES reference model consists of three parts:
• communication model;
• application model;
• management model.
These are defined in the following sections.
User User
Management Application Application
Management
Application
Protocol
Application Layer Application Layer
Presentation Layer Presentation Layer
Session Layer Session Layer
Communication
Transport Layer Protocols Transport Layer
Network Layer Network Layer
Data Link Layer Data Link Layer
Physical Layer
Physical Layer
Control channel medium
Information channel medium
Control Information Information Control
channel channel
channel channel
Management model Application model Communication model
Figure 2 – Overview of the Home Electronic System Reference Model

– 8 – TR 14543-3 © ISO/IEC:2000(E)

4.2 HES Communication model
In the HES reference model a distinction is made between information and control channels.

The control channel uses packet-switched transmission, whereas the information channel

typically uses circuit-switched transmission.

Packet-switched transmission is fundamental to
...