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ISO/IEC 21823-2
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
colour
inside
Internet of things (IoT) – Interoperability for IoT systems –
Part 2: Transport interoperability
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ISO/IEC 21823-2
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
colour
inside
Internet of things (IoT) – Interoperability for IoT systems –
Part 2: Transport interoperability
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.020; 35.110 ISBN 978-2-8322-8142-0
– 2 – ISO/IEC 21823-2:2020 © ISO/IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Network connectivity for transport interoperability . 6
5 Overview . 7
5.1 Network connectivity model and interfaces between IoT systems . 7
5.2 Network connectivity model and interfaces within an IoT system . 8
5.3 Network connectivity stack model . 10
6 Requirements for network connectivity between IoT systems . 12
6.1 Overview. 12
6.2 Network interfaces between different IoT systems . 13
6.2.1 Network service interface . 13
6.2.2 Network protocol translation interface . 13
6.2.3 Network resource interface . 13
6.3 Requirements of network connectivity . 13
6.3.1 General . 13
6.3.2 Service-related requirement . 13
6.3.3 Communication-related requirement . 14
6.3.4 Network resource-related requirement . 14
6.3.5 QoS requirement . 14
6.3.6 Bandwidth requirement . 15
6.3.7 Signalling requirement . 15
6.3.8 Status monitor requirement . 15
6.3.9 Security requirement . 15
6.3.10 Time-dependent requirement . 15
7 Requirements for network connectivity within an IoT system . 15
7.1 Overview. 15
7.2 Network elements for supporting network connectivity . 16
7.2.1 Network service interface . 16
7.2.2 Network protocol translation interface . 17
7.2.3 Network resource interface . 17
7.3 Gateways for supporting network connectivity . 17
Bibliography . 18
Figure 1 – Facets of IoT interoperability . 6
Figure 2 – Network connectivity model between two IoT systems . 7
Figure 3 – Network connectivity model within an IoT system . 9
Figure 4 – Network connectivity stack model between IoT systems . 10
Figure 5 – Network connectivity stack model within an IoT system . 11
Figure 6 – The connectivity between different IoT systems . 12
Figure 7 – The connectivity within an IoT system . 16
INTERNET OF THINGS (IoT) –
INTEROPERABILITY FOR IoT SYSTEMS –
Part 2: Transport interoperability
FOREWORD
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form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC
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International Standard ISO/IEC 21823-2 was prepared by subcommittee 41: Internet of Things
and related technologies, of ISO/IEC joint technical committee 1: Information technology.
The list of all currently available parts of the ISO/IEC 21823 series, under the general title
Internet of Things (IoT) – Interoperability for IoT systems, can be found on the IEC and ISO
websites.
The text of this International Standard is based on the following documents:
FDIS Report on voting
JTC1-SC41/138/FDIS JTC1-SC41/153/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.
– 4 – ISO/IEC 21823-2:2020 © ISO/IEC 2020
INTRODUCTION
Internet of Things (IoT) systems involve communications among different entities. This applies
to connections between different IoT systems. It also applies to the many connections that exist
within IoT systems. The various entities and their connections are described in ISO/IEC 30141.
The ISO/IEC 21823 series addresses issues that relate to interoperability of the
communications between IoT systems entities, both between different IoT systems and within
a single IoT system. ISO/IEC 21823-1 describes a general framework for interoperability for IoT
systems. This includes a facet model for interoperability which includes five facets of
interoperability: transport; syntactic; semantic; behavioural; policy. This document
(ISO/IEC 21823-2) addresses the transport interoperability for IoT systems. The semantic facet
of interoperability will be addressed in a future International Standard (ISO/IEC 21823-3). The
potential other parts address the syntactic facet, the behavioural facet and the policy facet of
interoperability.
As described in ISO/IEC 30141, IoT systems have multiple different types of networks
connecting the various system entities – network connectivity, addressing the transport facet of
the interoperability model, is thus of great importance in the description of interoperability for
IoT systems. The different networks need to be combined to provide the necessary network
connectivity between entities which are attached to each of the networks – in short, to enable
those entities to be interoperable. An example are the centralized applications and services
which need to receive data from remote sensors, or issue commands to remote actuators.
Network connectivity is the name given to the methods by which the various networks in an IoT
system are connected to one another. This document specifies a framework and requirements
for transport interoperability, in order to enable the construction of IoT systems with information
exchange, peer-to-peer connectivity and seamless communication both between different IoT
systems and also among entities within an IoT system.
To provide seamless communication and interaction between and within networks, it is
important to solve network level
...