ETSI TS 102 916-2 V1.2.1 (2023-05)

Intelligent Transport Systems (ITS); Test specifications for the mitigation techniques to avoid interference between Cooperative ITS-G5 and TTT DSRC; Part 2: Test Suite Structure and Test Purposes (TSS & TP)

RTS/ITS-00439

General Information

• Status: Not Published
• Technical Committee: ITS WG4 - Media and Medium related
• Current Stage: 12 - Completion
• Due Date: 15-May-2023
• Completion Date: 09-May-2023

Standards Content (Sample)

TECHNICAL SPECIFICATION
Intelligent Transport Systems (ITS);
Test specifications for the mitigation techniques to avoid
interference between Cooperative ITS-G5 and TTT DSRC;
Part 2: Test Suite Structure and Test Purposes (TSS & TP)

2 ETSI TS 102 916-2 V1.2.1 (2023-05)

Reference
RTS/ITS-00439
Keywords
DSRC, ITS, radio, RTTT, TSS&TP
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ETSI
3 ETSI TS 102 916-2 V1.2.1 (2023-05)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definition of terms, symbols and abbreviations . 6
3.1 Terms . 6
3.2 Symbols . 6
3.3 Abbreviations . 6
4 Test configurations . 7
4.1 Overview . 7
4.2 TTT DSRC RF detector test configuration . 7
4.3 Geolocation simulator test configuration . 7
4.4 CAM coexistence message test configuration . 7
4.5 TX power level test configuration . 8
4.6 Unwanted emission test configuration . 8
4.7 Duty cycle test configuration. 8
4.8 Time synchronization test configuration . 8
5 Test Suite Structure (TSS) . 8
5.1 General . 8
5.1.1 Introduction. 8
5.1.2 TP naming convention . 8
5.1.3 Test strategy . 9
5.2 Test Purposes . 9
5.2.0 Introduction. 9
5.2.1 Mitigation methods . 9
5.2.1.1 Mitigation method overview . 9
5.2.1.2 Mitigation method prerequisites . 9
5.2.1.3 Coexistence mode A . 10
5.2.1.4 Coexistence mode B . 10
5.2.1.5 Coexistence mode C . 11
5.2.1.6 Coexistence mode D . 11
5.2.1.7 Combined power reduction and duty cycle restriction . 12
5.2.1.8 Synchronization of fixed ITS-S with a tolling station . 13
5.2.2 Mitigation triggering . 13
5.2.2.1 Mitigation triggering overview . 13
5.2.2.2 Radio detection . 14
5.2.2.3 Map based detection . 15
5.2.2.4 Detection by temporary information from a vehicle CAM . 15
5.2.2.5 Detection by temporary information from an infrastructure CAM . 16
5.2.2.6 Detection by permanent information from an infrastructure CAM . 17
History . 19

ETSI
4 ETSI TS 102 916-2 V1.2.1 (2023-05)
Intellectual Property Rights
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Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Intelligent Transport Systems
(ITS).
The present document is part 2 of a multi-part deliverable covering the test specifications for the mitigation techniques
to avoid interference between Cooperative ITS-G5 and TTT DSRC, as identified below:
Part 1: "Protocol Implementation Conformance Statement (PICS)";
Part 2: "Test Suite Structure and Test Purposes (TSS & TP)";
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
5 ETSI TS 102 916-2 V1.2.1 (2023-05)
1 Scope
The present document provides the Test Suite Structure and Test Purposes (TSS&TP) for the test specifications for the
methods to ensure coexistence of cooperative ITS-G5 with TTT DSRC as specified in ETSI TS 102 792 [4] and ETSI
EN 302 663 [1] in compliance with the relevant requirements and in accordance with the relevant guidance given in
ISO/IEC 9646-7 [i.4] and ETSI ETS 300 406 [i.2].
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI EN 302 663: "Intelligent Transport Systems (ITS); ITS-G5 Access layer specification for
Intelligent Transport Systems operating in the 5 GHz frequency band".
[2] ETSI TS 102 916-1: "Intelligent Transport Systems (ITS); Test specifications for the methods to
ensure coexistence of Cooperative ITS G5 with RTTT DSRC; Part 1: Protocol Implementation
Conformance Statement (PICS)".
[3] ETSI EN 302 571 (V2.1.1): "Intelligent Transport Systems (ITS); Radiocommunications
equipment operating in the 5 855 MHz to 5 925 MHz frequency band; Harmonised Standard
covering the essential requirements of article 3.2 of Directive 2014/53/EU".
[4] ETSI TS 102 792 (V1.2.1): "Intelligent Transport Systems (ITS); Mitigation techniques to avoid
interference between European CEN Dedicated Short Range Communication (CEN DSRC)
equipment and Intelligent Transport Systems (ITS) operating in the 5 GHz frequency range".
[5] ETSI EN 302 637-2 (V1.3.2): "Intelligent Transport Systems (ITS); Vehicular Communications;
Basic Set of Applications; Part 2: Specification of Cooperative Awareness Basic Service".
[6] ETSI TS 102 894-2 (V1.2.1): "Intelligent Transport Systems (ITS); Users and applications
requirements; Part 2: Applications and facilities layer common data dictionary".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] Void.
[i.2] ETSI ETS 300 406: "Methods for testing and Specification (MTS); Protocol and profile
conformance testing specifications; Standardization methodology".
ETSI
6 ETSI TS 102 916-2 V1.2.1 (2023-05)
[i.3] ISO/IEC 9646-1: "Information technology -- Open Systems Interconnection -- Conformance
testing methodology and framework -- Part 1: General concepts".
[i.4] ISO/IEC 9646-7: "Information technology -- Open Systems Interconnection -- Conformance
testing methodology and framework -- Part 7: Implementation Conformance Statements".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the terms given in ETSI TS 102 792 [4], ETSI EN 302 663 [1] and the
following apply:
Abstract Test Method (ATM): Refer to ISO/IEC 9646-1 [i.3].
Abstract Test Suite (ATS): Refer to ISO/IEC 9646-1 [i.3].
Implementation Under Test (IUT): Refer to ISO/IEC 9646-1 [i.3].
Test Purpose (TP): Refer to ISO/IEC 9646-1 [i.3].
3.2 Symbols
For the purposes of the present document, the following symbols apply:
CenDsrcTollingZone data field of vehicle CAM containing protected zone information
ProtectedCommunicationZone data field of roadside unit CAM containing protected zone information
protectedZoneType distinguishes between temporary and non-temporary protected zone information
T time in between two transmissions
off
T duration of a transmitted data packet
on
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI TS 102 792 [4], ETSI EN 302 663 [1] and
the following apply:
ATS Abstract Test Suit
CAM Cooperative Awareness Message
CEN Comité Européen de Normalisation
DSRC Dedicated Short Range Communication
GPS Global Positioning System
ICS Implementation Conformance Statement
ITS Intelligent Transport System
ITS-G5 Acronym for the 5,9 GHz vehicular ad-hoc network
ITS-S ITS Station
IUT Implementation Under Test
OBU On Board Unit
PICS Protocol Implementation Conformance Statement
RF Radio Frequency
SUT System under Test
TP Test Purpose
TSS Test Suite Structure
TTT Transport and Traffic Telematics
TX Transmit
ETSI
7 ETSI TS 102 916-2 V1.2.1 (2023-05)
4 Test configurations
4.1 Overview
Test purposes of the present document address the mitigation techniques to avoid interference between European CEN
Dedicated Short Range Communication (TTT DSRC) equipment and Intelligent Transport Systems (ITS) operating in
the 5 GHz frequency range.
The mitigation techniques are specified in ETSI TS 102 792 [4]. Mobile ITS-S can either trigger the mitigation method
when close to a TTT DSRC toll station, or operate always in coexistence mode. Depending on the distance to the next
TTT DSRC toll station, fixed ITS-S can either operate always in normal mode, or they shall always operate in
coexistence mode.
When operating in coexistence mode, the TX power level and/or the TX timing (duty cycle) of the ITS-S are restricted.
The TX power level restriction depends on the distance to the tolling station, and the duty cycle restriction depends on
the number ITS-S surrounding the toll station. Both methods can be combined. Four coexistence modes (A, B, C,
and D) are specified in ETSI TS 102 792 [4] to simplify the choice of appropriate implementation criteria in terms of
complexity and performance. For fixed ITS-S an additional mitigation method is specified in ETSI TS 102 792 [4] that
is based on time synchronization with the tolling station nearby.
From this, the following test purposes can be derived:
• Triggering by detection of a TTT DSRC RF signal
• Triggering by a geolocation database
• Triggering by reception of a geolocation
• Mitigation by TX power reduction
• Mitigation by duty cycle restriction
• Mitigation by time synchronization with the tolling station
The following clauses specify the test configurations necessary to assess the abovementioned test purposes.
4.2 TTT DSRC RF detector test configuration
The test configuration and test description for the TTT DSRC RF detector test is specified in clause 5.3.10.3.3 of ETSI
EN 302 571 V2.1.1 [3].
4.3 Geolocation simulator test configuration
For the test purposes that assess the correct detection of a tolling station by its geolocation, a GPS simulator is
necessary. The GPS simulator is connected to the GPS antenna connector of the SUT and simulates the signals of GPS
satellites characteristic for a certain geolocation. Alternatively the geolocation can be transferred to the SUT via a test
interface.
4.4 CAM coexistence message test configuration
ETSI EN 302 637-2 [5] and ETSI TS 102 894-2 [6] specify the CAM data fields CenDsrcTollingZone for vehicle ITS-S
(ICS 17) and ProtectedCommunicationZone for ITS-S of type road side unit (ICS 16), to disseminate the protected zone
information. For a roadside unit the data element protectedZoneType is used to distinguish between a temporary
protected zone position (protectedZoneType 1) and a protected zone centre position list (protectedZoneType 0).
For the test purposes that assess the correct handling of the CAM data fields CenDsrcTollingZone and
ProtectedCommunicationZone, a test system that can transmit a CAM containing one of these data fields shall be
connected to the ITS-G5 antenna connector of the SUT.
ETSI
8 ETSI TS 102 916-2 V1.2.1 (2023-05)
4.5 TX power level test configuration
The test configuration and test description for the RF output power measurement is specified in clause 5.3.3 of ETSI
EN 302 571 V2.1.1 [3].
4.6 Unwanted emission test configuration
The test configuration and test description for the RF unwanted emissions measurement is specified in clause 5.3.4 of
ETSI EN 302 571 V2.1.1 [3].
4.7 Duty cycle test configuration
The time T is defined as the duration of a transmitted data packet. The time T is the time in between two
on off
transmissions. T can be determined by measuring the time while the transmit power level is above an appropriate
on
threshold, while T is the time during which the transmit power level is below this threshold.
off
The maximum time measurement deviation of the test system shall be better than ±100 µs.
4.8 Time synchronization test configuration
The test configuration for the time synchronization test consists of a tolling station that is synchronized with the SUT,
so that the SUT is never transmitting when the toll system is transmitting or receiving. The transmission timing of the
SUT can be assessed similar to the duty cycle test configuration specified in clause 4.7. The transmission timing of the
tolling station can be either assessed by monitoring of the TX power level or by a test interface, since for the reception
timing assessment anyhow a test interface is necessary.
5 Test Suite Structure (TSS)
5.1 General
5.1.1 Introduction
Test Purposes have been written for mitigation techniques to avoid interference between European Transport and
Traffic Telematics Dedicated Short Range Communication (TTT DSRC) equipment and Intelligent Transport Systems
(ITS) operating in the 5 GHz frequency range as defined in ETSI TS 102 792 [4] and ETSI EN 302 663 [1]. All test
purposes in the present document assess mandatory functionality unless they have been marked with the keyword
"OPTIONAL" at the beginning of the TP summary. The test purposes can only be performed when certain
preconditions are met. These preconditions are listed in the TP summary tables.
The test purposes have been divided according to the functionalities into two groups:
• TP_MIT Mitigation methods
• TP_TRIG Trigger methods
5.1.2 TP naming convention
TPs are numbered, starting at 001, within each group. Groups are organized according to the TSS.
ETSI
9 ETSI TS 102 916-2 V1.2.1 (2023-05)
Table 1: TP identifier naming convention scheme
Identifier: ___
= Test Purpose: fixed to "TP"
= group MIT Test of mitigation method
TRIG Test of coexistence mode triggering
= type of IUT: VEHICLE ITS-G5 vehicle station
PERSON Personal ITS-G5 device
FIX ITS-G5 roadside station
MOBILE ITS-G5 personal devices and ITS-G5 vehicle stations
ALL Any ITS-G5 station
= sequential number (01 to 99)

5.1.3 Test strategy
As the base standards ETSI TS 102 792 [4] and ETSI EN 302 663 [1] contain no explicit requirements for testing, the
TPs were generated as a result of an analysis of the base standard and the PICS specification ETSI TS 102 916-1 [2].
Radio conformance tests specified in ETSI EN 302 571 [3] are included in the present document by reference.
The test descriptions are split into the assessment of mitigation methods (clause 5.2.1) and the assessment of the correct
triggering of the mitigation methods for mobile ITS-S (clause 5.2.2). The triggering tests include the assessment of the
detection and determination of the size of a protected zone. The mitigation methods are assessed by characterizing the
transmit timing (e.g. duty cycle) and the spectral power density of the transmitted signal.
For mobile ITS-S the mitigation test method is an integral part of the triggering test. Only for fixed ITS-S and mobile
ITS-S operating always in coexistence mode the mitigation test method shall be tested separately.
Clause 5.2.1.8 is only applicable to fixed ITS-S and deals with the special case of synchronizing it with a tolling station.
5.2 Test Purposes
5.2.0 Introduction
All PICS items referred to by their Implementation Conformance Statement (ICS) item number in this clause are as
specified in ETSI TS 102 916-1 [2] unless indicated otherwise by another numbered reference.
5.2.1 Mitigation methods
5.2.1.1 Mitigation method overview
ETSI TS 102 792 [4] specifies four mitigation methods for mobile ITS-S denominated as coexistence mod
...