ISO 21111-8:2022

INTERNATIONAL ISO
STANDARD 21111-8
First edition
2022-08
Road vehicles — In-vehicle Ethernet —
Part 8:
Electrical 100-Mbit/s Ethernet
transmission media, components and
tests
Véhicules routiers — Ethernet embarqué —
Partie 8: Tests, composants et supports de transmission ethernet
électriques à 100 Mbit/s
Reference number
© ISO 2022
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 3
5 Communication channel/link .4
5.1 General . 4
5.1.1 Definition of communication channel . 4
5.1.2 Operating temperature . 5
5.1.3 RF parameters . 5
5.1.4 Definition of whole communication channel . 6
5.1.5 Definition of coupling zone . 6
5.2 Specification of single channel charactoristics for SCC, cable and connector . 8
5.2.1 Specification of SCC in WCC configuration including assembly . 8
5.2.2 Specification of the cable in SCC . 9
5.2.3 Specification of the connector in SCC . 9
5.3 Specification related to the electromagnetic interaction between SCC and ES . 9
5.3.1 Specification of the connector . 9
5.3.2 Specification of SCC in WCC including assembly . 10
6 Test methods .10
6.1 Apparatus . 10
6.1.1 Test equipment . 10
6.1.2 Precautions for VNA . 11
6.1.3 VNA setting parameter . 11
6.2 Procedure .12
6.2.1 Cable . 12
6.2.2 Connector . 12
6.2.3 WCC . 14
6.3 Test results . 17
Annex A (informative) Extended test setup definitions .18
Annex B (informative) Correction method for TDR measurements .19
Annex C (informative) Definitions for alien cross talk test setup four-around-one .21
Bibliography .23
iii
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
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on the ISO list of patent declarations received (see www.iso.org/patents).
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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 22, Road vehicles, Subcommittee SC 32,
Electrical and electronic components and general system aspects.
A list of all parts in the ISO 21111 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
Introduction
The ISO 21111 series includes in-vehicle Ethernet requirements and test plans that are disseminated in
other international standards and complements them with additional test methods and requirements.
The resulting requirement and test plans are structured in different documents following the Open
Systems Interconnection (OSI) reference model and grouping the documents that depend on the
physical media and bit rate used.
In general, the Ethernet requirements are specified in ISO/IEC/IEEE 8802-3. The ISO 21111 series
provides supplemental specifications (e.g. wake-up, I/O functionality), which are required for in-vehicle
Ethernet applications. In road vehicles, Ethernet networks are used for different purposes requiring
different bit-rates. Currently, the ISO 21111 series specifies the 1-Gbit/s optical and 100-Mbit/s
electrical physical layer.
The ISO 21111 series contains requirement specifications and test methods related to the in-vehicle
Ethernet. This includes requirement specifications for physical layer entity (e.g. connectors, physical
layer implementations) providers, device (e.g. electronic control units, gateway units) suppliers, and
system (e.g. network systems) designers. Additionally, there are test methods specified for conformance
testing and for interoperability testing.
Safety (electrical safety, protection, fire, etc.) and electromagnetic compatibility (EMC) requirements
are out of the scope of the ISO 21111 series.
The structure of the specifications given in the ISO 21111 series conforms with the Open Systems
[1] [2]
Interconnection (OSI) reference model specified in ISO/IEC 7498-1 and ISO/IEC 10731 .
ISO 21111-1 defines the terms which are used in this series of standards and provides an overview
of the standards for in-vehicle Ethernet including the complementary relations to ISO/IEC/IEEE 8802
and the amendments, the document structure, type of physical entities, in-vehicle Ethernet specific
functionalities, and so on.
[4]
ISO 21111-2 specifies the interface between reconciliation sublayer and physical entity including
reduced gigabit media independent interface (RGMII), and the common physical entity wake-up and
synchronized link sleep functionalities, independent from physical media and bit rate.
[5]
ISO 21111-3 specifies supplemental requirements to a physical layer capable of transmitting
1-Gbit/s over plastic optical fibre compliant with ISO/IEC/IEEE 8802-3, with specific application to
communications inside road vehicles, and a test plan for physical entity conformance testing.
[6]
ISO 21111-4 specifies the optical components requirements and test methods for 1-Gbit/s optical in-
vehicle Ethernet.
[7]
ISO 21111-5 specifies, for 1-Gbit/s optical in-vehicle Ethernet, requirements on the physical layer at
system level, requirements on the interoperability test set-ups, the interoperability test plan that checks
the requirements for the physical layer at system level, requirements on the device-level physical layer
conformance test set-ups, and device-level physical layer conformance test plan that checks a set of
requirements for the OSI physical layer that are relevant for device vendors.
[8]
ISO 21111-6 specifies advanced features of an ISO/IEC/IEEE 8802-3 in-vehicle Ethernet physical
layer (often also called transceiver), e.g. for diagnostic purposes for in-vehicle Ethernet physical
layers. It specifies advanced physical layer features, wake-up and sleep features, physical layer test
suite, physical layer control requirements and conformance test plan, physical sublayers test suite and
physical sublayer requirements and conformance test plan.
[9]
ISO 21111-7 specifies the implementation for ISO/IEC/IEEE 8802-3, which defines the interface
implementation for automotive applications together with requirements on components used to realize
this Bus Interface Network (BIN). ISO 21111-7 also defines further testing and system requirements
for systems implemented according to the system specification. In addition, ISO 21111-7 defines
the channels for tests of transceivers with a test wiring harness that simulates various electrical
communication channels.
v
This document specifies the transmission media, the channel performance and the tests for an
ISO/IEC/IEEE 8802-3 in-vehicle Ethernet.
ISO 21111-9 specifies the data link layer requirements and conformance test plan. It specifies the
requirements and test plan for devices and systems with bridge functionality.
[10]
ISO 21111-10 specifies the application to network layer requirements and test plan. It specifies the
requirements and test plan for devices and systems that include functionality related with OSI layers
from 3 to 7.
Figure 1 shows the parts of the ISO 21111 series and the document structure.
Figure 1 — In-vehicle Ethernet document reference according to the OSI model
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