ISO 21111-1:2020

INTERNATIONAL ISO
STANDARD 21111-1
First edition
2020-10
Road vehicles — In-vehicle Ethernet —
Part 1:
General information and definitions
Véhicules routiers — Ethernet embarqué —
Partie 1: Information générale et définitions
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 3
5 In-vehicle Ethernet . 3
5.1 Relationship of in-vehicle Ethernet physical entity to OSI reference model . 3
5.1.1 General. 3
5.1.2 Interface of in-vehicle Ethernet physical entity to data link layer . 4
5.1.3 Interface of in-vehicle Ethernet physical entity to neighbour physical entities. 4
5.1.4 Wake-up and synchronised link sleep . 4
5.1.5 PCS, PMA and PMD sub-layer . 5
5.2 In-vehicle Ethernet physical entity options . 5
5.3 Component, physical entity, device, and network system requirements . 6
Bibliography . 8
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
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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
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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 31,
Data communication.
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 © ISO 2020 – All rights reserved

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 specifications given in the ISO 21111 series complies with the Open Systems
[1] [2]
Interconnection (OSI) reference model specified in ISO/IEC 7498-1 and ISO/IEC 10731 .
This document 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 8802-3
and the amendments, the document structure, type of physical entities, in-vehicle Ethernet specific
functionalities and so on.
[10]
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
synchronised link sleep functionalities, independent from physical media and bit rate.
[11]
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.
[12]
ISO 21111-4 specifies the optical components requirements and test methods for 1-Gbit/s optical in-
vehicle Ethernet.
[13]
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.
[14]
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 sublayers requirements and conformance test plan.
[15]
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.
[16]
ISO 21111-8 specifies the transmission media, the channel performance and the tests for an
ISO/IEC/IEEE 8802-3 in-vehicle Ethernet.
[17]
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.
[18]
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 OSI model
vi © ISO 2020 – All rights reserved

INTERNATIONAL STANDARD ISO 21111-1:2020(E)
Road vehicles — In-vehicle Ethernet —
Part 1:
General information and definitions
1 Scope
This document defines the terms which are used in the ISO 21111 series and provides an overview of the
[7]
standards for in-vehicle Ethernet including the complementary relations to ISO/IEC/IEEE 8802-3:2017
and its amendments, the document structure in accordance with OSI reference model specified in
[1] [2]
ISO/IEC 7498-1 and ISO/IEC 10731:1994, type of physical entities, in-vehicle Ethernet specific
functionalities, and so on.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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
100BASE-T1
physical layer for 100-Mbit/s electrical Ethernet over single balanced twisted pair
[8]
Note 1 to entry: 100BASE-T1 is specified in ISO/IEC/IEEE 8802-3:2017/Amd 1 .
3.2
1000BASE-RHC
physical layer for 1-Gbit/s Ethernet over plastic optical fibre tailored for automotive application
requirements
[9]
Note 1 to entry: 1000BASE-RHC is specified in ISO/IEC/IEEE 8802-3:2017/Amd 9 .
3.3
balanced twisted pair
twisted pair of 100-Ω wire, which consist of copper core and dielectric jacket
3.4
bridge
layer 2 interconnection device (3.5)
[SOURCE: ISO/IEC/IEEE 8802-3:2017, 1.4]
3.5
device
functioning electric/electronic system
3.6
gigabit Ethernet over plastic optical fibre entity
GEPOF entity
physical layer for 1-Gbit/s Ethernet over plastic optical fibre (3.19) tailored for automotive application
requirements
Note 1 to entry: GEPOF is specified in specified in ISO/IEC/IEEE 8802-3:2017/Amd 9.
3.7
gigabit media independent interface
GMII
interface between physical entity (3.15) and data link layer
Note 1 to entry: GMII is specified in ISO/IEC/IEEE 8802-3:2017, Clause 35.
3.8
in-vehicle Ethernet
Ethernet network system optimized for in-vehicle implementation
3.9
link partners
two physical entities connected bi-directionally through a physical media (3.16)
3.10
media dependent interface
MDI
optical or electrical interface between physical layer entity and physical media
Note 1 to entry: MDI is specified in ISO/IEC/IEEE 8802-3.
3.11
media independent interface
MII
interface between physical layer and data link layer
Note 1 to entry: MII is specified in ISO/IEC/IEEE 8802-3:2017, Clause 22.
3.12
neighbour physical entities
two or more physical entities embedded in the same device (3.5)
3.13
OSI reference model
model to divide the communication function into seven different layers
[1] [2]
Note 1 to entry: OSI reference model is specified in ISO/IEC 7498-1 and ISO/IEC 10731 .
3.14
physical coding sublayer
PCS
sublayer in which transmission data bits are encoded
Note 1 to entry: PCS is specified in ISO/IEC/IEEE 8802-3.
3.15
physical entity
in-vehicle Ethernet (3.8) physical layer for certain bit rates and physical media
3.16
physical media
media that transfers signals between physical
...