ISO 17515-3:2019

INTERNATIONAL ISO
STANDARD 17515-3
First edition
2019-08
Intelligent transport systems —
Evolved-universal terrestrial radio
access network —
Part 3:
LTE-V2X
Systèmes intelligents de transport) — Réseau d'accès à la radio
terrestre universelle évoluée (E-UTRAN) —
Partie 3: LTE-V2X
Reference number
©
ISO 2019
© ISO 2019
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Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 2
5 Usage of LTE in ITS . 3
5.1 LTE features used in ITS . 3
5.2 General access to the Internet . 3
5.3 Device-to-device communications (D2D) . 4
5.4 Vehicle-to-everything communications (V2X) . 4
5.5 Implementation guidelines . 5
6 General requirements . 5
6.1 LTE basics . 5
6.1.1 LTE-V2X . 5
6.1.2 Supported LTE modes of operation . 5
6.2 ITS station . 6
6.2.1 Station and communication architecture . 6
6.2.2 Service access points . 8
6.2.3 Hybrid communications support . 8
7 Communication interface protocol stack . 8
7.1 Physical layer . 8
7.2 Data link layer . 9
7.2.1 Basic behaviour . 9
7.2.2 Data link layer communication addresses . 9
7.2.3 Identification of higher layer protocols. 9
7.3 Communication adaptation sub-layer .10
8 Communication interface management .11
8.1 General management.11
8.2 Management adaptation entity.11
8.2.1 LTE-V2X parameters and I-Parameters .11
8.2.2 LTE-V2X management commands and MI-SAP commands and requests .11
9 Procedures .12
9.1 Communication interface procedures .12
9.1.1 Transmit procedure .12
9.1.2 Receive procedure .12
9.2 Management procedures .12
9.2.1 Cross-CI prioritization .12
9.2.2 Operational mode .13
9.2.3 LTE-V2X MAC address mapping.13
9.2.4 CI connection procedure .14
9.2.5 CI state management .14
10 Conformance .14
11 Test methods .15
Annex A (normative) Communication interface parameters .16
Annex B (normative) MI-COMMANDs .19
Annex C (normative) MI-REQUESTs .20
Annex D (normative) ASN.1 definitions .21
Annex E (informative) CI state transitions .24
Bibliography .26
iv © ISO 2019 – All rights reserved

Foreword
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This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
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Introduction
Localized communications are an essential component of hybrid communications in Intelligent
Transport Systems (ITS). Various access technologies are suited for localized communications. An
increasing interest of ITS stakeholders for "Cooperative ITS" and "Urban ITS" is in the access technology
known under the acronym of LTE. LTE refers to a packet switched cellular network technology specified
by 3GPP. Beside the "traditional" features of cellular networks, LTE also supports device-to-device
communications, e.g. for public safety applications, and vehicle-to-everything communications (LTE-
V2X) especially designed for ITS.
This document provides complements to LTE-V2X specifications from 3GPP needed to operate it as an
ITS access technology in an ITS station unit specified in ISO 21217. An implementation of this document
is referred to as an ITS-LTE-V2X communication interface (CI).
ITS-LTE-V2X CIs are able to
— operate with support of an LTE base station, and
— operate without support of an LTE base station, e.g. outside LTE coverage areas
as specified by 3GPP.
vi © ISO 2019 – All rights reserved

INTERNATIONAL STANDARD ISO 17515-3:2019(E)
Intelligent transport systems — Evolved-universal
terrestrial radio access network —
Part 3:
LTE-V2X
1 Scope
This document provides specifications related to the ITS-S access layer for a communication interface
(CI) named "ITS-LTE-V2X".
ITS-LTE-V2X CIs are based on the evolved-universal terrestrial radio access (E-UTRA) vehicle-to-
everything (LTE-V2X) technology standardized at 3GPP.
This document enables usage of the LTE-V2X technology as an ITS access technology in an ITS station
by reference to respective specifications from 3GPP, and by specifying details of the “Communication
Adaptation Layer” (CAL) and the “Management Adaptation
...