ETSI ES 202 663 V1.1.0 (2010-01)

Final draft ETSI ES 202 663 V1.1.0 (2009-11)
ETSI Standard


Intelligent Transport Systems (ITS);
European profile standard for the physical and medium access
control layer of Intelligent Transport Systems operating
in the 5 GHz frequency band

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2 Final draft ETSI ES 202 663 V1.1.0 (2009-11)



Reference
DES/ITS-0040015
Keywords
ITS, layer 1, layer 2, MAC, profile
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2009.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3 Final draft ETSI ES 202 663 V1.1.0 (2009-11)
Contents
Intellectual Property Rights . 5
Foreword . 5
Introduction . 5
1 Scope . 6
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Definitions, symbols and abbreviations . 9
3.1 Definitions . 9
3.2 Symbols . 9
3.3 Abbreviations . 9
4 General requirements . 9
4.1 ITS station reference architecture . 9
4.2 ITS-G5 mode of operation. 10
4.3 Operations in ITS-G5C . 11
4.4 Distributed congestion control . 11
4.5 Quality of service based on user priority . 11
5 Physical layer . 12
5.1 General requirements . 12
5.2 Frequency allocation . 12
5.3 Channel allocation . 13
5.4 Transmit power control . 14
5.5 Receiver performance . 14
6 Medium access control sub-layer . 15
6.1 General requirements . 15
6.2 Frame format . 15
6.3 MAC header . 15
6.3.1 Header structure . 15
6.3.2 Frame control field. 16
6.3.2.1 Structure . 16
6.3.2.2 Type and subtype . 16
6.3.2.3 To DS and From DS . 16
6.3.2.4 Fragmentation . 16
6.3.2.5 Power management . 16
6.3.2.6 Protected frame . 16
6.3.3 Address fields . 17
6.3.4 QoS control field . 17
6.4 MAC addressing . 17
6.5 Quality of service . 17
6.6 Dynamic frequency selection . 18
7 Management . 18
7.1 General requirements . 18
7.2 Management information base . 18
7.2 Management service access points . 18
7.3 Regulatory domain . 18
7.4 Power management . 19
8 Conformance and test methods . 19
Annex A (normative): Parameters . 20
A.1 IEEE802dot11-MIB attribute values . 20
ETSI

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4 Final draft ETSI ES 202 663 V1.1.0 (2009-11)
A.2 ITS-G5 specific MIB attribute types . 20
A.3 ITS-G5 specific MIB attributes . 21
Annex B (normative): ASN.1 modules . 22
B.1 Modules . 22
B.1.1 IEEE 802.11 . 22
B.1.2 ES 202 663 . 22
Annex C (informative): MAC data services . 23
C.1 Semantics of the data service primitives . 23
C.2 MA-UNITDATA.request . 23
C.3 MA-UNITDATA.indication . 23
C.4 MA-UNITDATA.confirm . 24
Annex D (informative): Management SAP . . 25
D.1 General . 25
D.2 MLME-SAP . 25
Annex E (informative): Bibliography . 26
History . 27

ETSI

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5 Final draft ETSI ES 202 663 V1.1.0 (2009-11)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Intelligent Transport System (ITS), and is
now submitted for the ETSI standards Membership Approval Procedure.
Introduction
Intelligent Transport Systems (ITS) are being developed in all regions by standard institutes, industry initiatives and
research activities.
The present document provides the European profile standard for communications in the 5 GHz band. The work is
based on the published IEEE standard 802.11 [3] and on developments at IEEE on the amendment 802.11p [i.3].
The functionality specified in the present document is named "ITS-G5" and distinguishes several frequency ranges. It
covers the physical layer and parts of the data link layer, i.e. the medium access control sub-layer and extensions to
handle parameters of these layers to be used on a per-MSDU basis, including the related management.
ETSI

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6 Final draft ETSI ES 202 663 V1.1.0 (2009-11)
1 Scope
The present document specifies the European profile in line with [i.8] of the physical and medium access control
sub-layer of 5 GHz intelligent transport systems (ITS) using IEEE 802.11 [3] as the base standard. It covers the
frequency ranges:
• ITS-G5A: Operation of ITS-G5 in European ITS frequency bands dedicated to ITS for safety related
applications in the frequency range 5,875 GHz to 5,905 GHz.
• ITS-G5B: Operation in European ITS frequency bands dedicated to ITS non- safety applications in the
frequency range 5,855 GHz to 5,875 GHz.
• ITS-G5C: Operation of ITS applications in the frequency range 5,470 GHz to 5,725 GHz.
One of the additionally selected functionalities being an essential part of the present document is "communication
outside the context of a BSS" as currently being developed by IEEE 802.11 Task Group p [3].
Communication outside the context of a BSS enables exchange of data frames between stations that are not members of
a BSS. This type of communication allows for immediate exchange of data frames, avoiding the latency associated with
the establishment of a BSS.
The present document covers the following IEEE 802.11 [3] services:
• spectrum management services (DFS, uniform spreading) for ITS-G5C;
• transmit power control;
• traffic differentiation and QoS support;
• selected MAC data services: DCF, EDCA, fragmentation/de-fragmentation (the latter only for ITS-G5C);
• selected MAC control services: ACK, RTS, CTS;
• selected MAC management services: selected action frames (spectrum management action frames);
• OFDM PHY.
The profile excludes the following IEEE 802.11 [3] features:
• association services;
• access control and data confidentiality services;
• higher-layer timer synchronization;
• selected MAC data services, i.e. PCF, HCF HCCA;
• selected MAC control services, i.e. PS-Poll, CF-End, CF-End + CF-Ack, Block Ack Request/Block Ack;
• selected MAC management services, i.e. beacon, ATIM, disassociation, association request/response,
re-association request/response, probe request/response, authentication, de-authentication, selected action
(measurement request/report);
• power management services.
ETSI

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7 Final draft ETSI ES 202 663 V1.1.0 (2009-11)
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://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.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI EN 302 571 (V1.1.1): "Intelligent Transport Systems (ITS); Radiocommunications
equipment operating in the 5 855 MHz to 5 925 MHz frequency band; Harmonized EN covering
the essential requirements of article 3.2 of the R&TTE Directive".
[2] ETSI EN 301 893 (V1.5.1): "Broadband Radio Access Networks (BRAN); 5 GHz high
performance RLAN; Harmonized EN covering the essential requirements of article 3.2 of the
R&TTE Directive".
[3] IEEE 802.11:2007: "IEEE Standard for Information Technology-Telecommunications and
information exchange between systems-Local and metropolitan area networks-Specific
requirements; Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)
Specifications".
NOTE: Amendments to this standard are considered in [i.14] and [i.4] which are essential to understand the
sources from which some of the functionality in the present document is derived.
[4] IEEE Std 802-2001: "IEEE Standard for Local and Metropolitan Area Networks: Overview and
Architecture".
[5] ANSI/IEEE Std 802.2:1998: "Information technology -- Telecommunications and information
exchange between systems -- Local and metropolitan area networks -- Specific requirements --
Part 2: Logical Link control".
[6] ISO/IEC 7498-1:1994: "Information technology - Open Systems Interconnection - Basic
Reference Model: The Basic Model".
[7] ITU-T Recommendation X.691 (2002): "Information technology - ASN.1 encoding rules:
Specification of Packed Encoding Rules (PER)".
[8] IEEE P802.11k (2008): "IEEE Standard for Information technology - Telecommunications and
information exchange between systems - Local and metropolitan area networks - Specific
requirements Part 11: Wireless LAN Medium Access Control (MAC)and Physical Layer (PHY)
Specifications Amendment 1: Radio Resource Measurement of Wireless LANs".
ETSI

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8 Final draft ETSI ES 202 663 V1.1.0 (2009-11)
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies
[i.1] ETSI TR 102 654 (V1.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Road Transport and Traffic Telematics (RTTT); Co-location and Co-existence Considerations
regarding Dedicated Short Range Communication (DSRC) transmission equipment and Intelligent
Transport Systems (ITS) operating in the 5 GHz frequency range and other potential sources of
interference".
[i.2] ETSI EN 300 674 (all parts): "ElectroMagnetic Compatibility and Radio Spectrum Matters
(ERM); Road Transport and Traffic Telematics (RTTT); Technical characteristics and test
methods for Dedicated Short Range Communication (DSRC) transmission equipment (500 kbit/s
/ 250 kbit/s) operating in the 5,8 GHz Industrial, Scientific and Medical (ISM) band".
[i.3] IEEE P802.11pTM/D8.0:2009: "Draft Standard for Information Technology -
Telecommunications and information exchange between systems - Local and metropolitan area
networks - Specific requirements - Part 11: Wireless LAN Medium Access Control (MAC) and
Physical Layer (PHY) specifications; Amendment 7: Wireless Access in Vehicular
Environments".
[i.4] ECC/DEC/(08)01: "ECC Decision of 14 March 2008 on the harmonised use of the 5875-
5925 MHz frequency band for Intelligent Transport Systems (ITS)".
[i.5] ECC/REC/(08)01: "ECC Recommendation (08)01 on the use of the band 5855-5875 MHz for
Intelligent Transport Systems (ITS)".
[i.6] ERC/DEC(99)23: "ERC Decision of 29 November 1999 on the harmonised frequency bands to be
designated for the introduction of High Performance Radio Local Area Networks (HIPERLANs)".
[i.7] ECC/DEC(02)01: "ECC Decision of 15 March 2002 on the frequency bands to be designated for
the co-ordinated introduction of Road Transport and Traffic Telematic Systems".
[i.8] ETSI ETS 300 406 (edition 1): "Methods for Testing and Specification (MTS); Protocol and
profile conformance testing specifications; Standardization methodology".
[i.9] 2005/513/EC: "COMMISSION DECISION of 11 July2005 on the harmonised use of radio
spectrum in the 5 GHz frequency band for the implementation of wireless access systems
including radio local area networks (WAS/RLANs)".
[i.10] 2007/90/EC: "COMMISSION DECISION of 12 February 2007 amending Decision 2005/513/EC
on the harmonised use of radio spectrum in the 5 GHz frequency band for the implementation of
Wireless Access Systems including Radio Local Area Networks (WAS/RLANs)".
[i.11] 2008/671/EC: "COMMISSION DECISION of 5 August 2008 on the harmonised use of radio
spectrum in the 5 875-5 905 MHz frequency band for safety-related applications of Intelligent
Transport Systems (ITS)".
[i.12] ETSI TS 102 687 (V1.1.1): "Intelligent Transport Systems (ITS); Transmitter Power Control
Mechanism for Intelligent Transport Systems operating in the 5 GHz range".
[i.13] ETSI TS 102 723-3: "Intelligent Transport Systems; OSI cross-layer topics; Part 3: Interface
between management entity and access layer".
[i.14] ETSI TS 102 665 (V1.1.1): "Intelligent Transport Systems (ITS); Vehicular Communications;
Architecture".
ETSI

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9 Final draft ETSI ES 202 663 V1.1.0 (2009-11)
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in [1], [2], [3], [4], [5], [6], [7], [8], [i.14] and
the following apply:
ITS-G5: set of protocols and parameters as specified in the present document
ITS-G5 Control Channel: physical channel as defined in clause 5.3
ITS-G5 Service Channel: any other physical channel than the ITS-G5 Control Channel as defined in clause 5.3
ITS-G5 STA: device that contains an ITS-G5
3.2 Symbols
For the purposes of the present document, the following symbols apply:
'00101100’b notation used for numeric values presented in binary numeral system
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in [1], [2], [3], [4], [5], [6], [7], [8], [i.14] and the
following apply:
DCC Decentralized Congestion Control
G5CC ITS-G5 Control Channel
G5SC ITS-G5 Service Channel
ITS-G5A Frequency band ranging from 5,875 GHz to 5,905 GHz
NOTE: Dedicated to ITS for safety related applications.
ITS-G5B Frequency band ranging from 5,855 GHz to 5,875 GHz
NOTE: Dedicated to ITS non-safety applications.
ITS-G5C Frequency band ranging from 5,470 GHz to 5,725 GHz
NOTE: Used for ITS applications.
4 General requirements
4.1 ITS station reference architecture
Figure 1 shows the part of the ITS AL that is covered by the present document. It is based on the OSI layered
communications model with a detailed view of the ITS Access Technology layer.The mapping between the ITS-G5
elements specified in the present document and the ITS AL model is shown in figure 1.
ETSI

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10 Final draft ETSI ES 202 663 V1.1.0 (2009-11)

Figure 1: Access layer with ITS-G5 MAC and PHY
The present document specifies the following elements of ITS-G5: a physical layer, a medium access control sub-layer,
a MAC sub-layer Management Entity (MLME) and a Physical Layer Management entity (PLME). ITS-G5 also
includes the SAPs MAC_SAP and MLME_SAP (depicted in black in figure 1). The internal SAPs PHY_SAP and
PMD_SAP (depicted in white in figure 1) are not part of ITS-G5 specification, which implies that an ITS-G5 STA may
not implement these SAPs. However, a STA implementing these SAPs in compliance with 802.11 [3] is also considered
compliant to ITS-G5.
In figure 1 the ITS-G5 physical layer is composed of the two sub-layers PLCP and PMD. The distinction of the two
sub-layers is only presented for homogeneity with [3]. In fact, ITS-G5 only supports the OFDM PHY specification.
Consequently, ITS-G5 STAs may not have the two sub-layers PLCP and PMD and, instead, may have one single
physical layer.
As compared to [3], ITS-G5 does not provide the SME-PLME_SAP. Consequently, only the MLME can access the
PHY MIB via the MLME-PLME_SAP. The MLME-PLME_SAP is therefore part of ITS-G5 (see annex D).
The MLME SAP can be identical to the MI-SAP in [i.14].
NOTE: The general approach is going to be described in TS 102 723-3 [i.13].
ITS-G5 MAC_SAP, MLME_SAP and MLME-PLME_SAP shall be compliant with the correspondent SAPs of IEEE
802.11 [3] with restrictions and amendments as specified in the present document. In particular, the present document
specifies amendments to the MAC_SAP (see annex C), whereas the ITS-G5 MLME_SAP (see annex D) is a subset of
the IEEE 802.11 [3] MLME_SAP. No amendments nor subset are specified for the MLME-PLME_SAP.
With respect to the ITS AL model depicted in figure 1, ITS-G5 MLME_SAP is the subset of the IM-SAP that
represents the management SAP for ITS-G5 interfaces. The MAC_SAP is not matched by a correspondent SAP in the
ITS AL model. The MAC_SAP is used by the ITS-G5 LLC layer that is out of scope of the present document.
4.2 ITS-G5 mode of operation
An ITS-G5 STA shall operate outside the context of a BSS.
NOTE: The mode of operation outside the context of a BSS is drafted in [i.3]. Consequently, the MAC services
SCAN, JOIN, ASSOCIATE, AUTHENTICATE are not applicable.
All ITS-G5 STAs operating on ITS-G5A and ITS-G5B are treated equally as peer stations, disregard whether they are
fixed or mobile.
ETSI

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11 Final draft ETSI ES 202 663 V1.1.0 (2009-11)
For operation in ITS-G5C, a distinction between fixed and mobile ITS-G5 STAs is made in order to apply spectrum
management based on DFS. Mobile ITS-G5 STAs act as DFS slaves and fixed ITS-G5 STAs as DFS masters.
4.3 Operations in ITS-G5C
The Commission Decisions [i.9] and [i.10] regulate the usage of the 5 GHz frequency band for wireless access systems
and radio local area networks. Operation in the RLAN band, see figure 2 and [2], requires Transmit Power Control
(TPC), a procedure for Dynamic Frequency Selection (DFS) and uniform spreading to detect signals from radar systems
and avoid co-channel operation with these systems; provide on aggregate a near-uniform loading of the spectrum,
i.e. uniform spreading.
NOTE: RLAN also is referred to as WLAN. These requirements apply to all types of RLAN devices regardless of
the type of communication between these devices.
In order to comply with these regulatory requirements [2], it is foreseen for operation in ITS-G5C to allow
communications only between a fixed ITS-G5 STA at the roadside as DFS master device, and the mobile ITS-G5 STA
in the vehicles as DFS slave devices. Consequently, communication between mobile ITS-G5 STAs in ITS-G5C is not
possible.
The DFS master shall be in charge of service advertisement, transmission control and selection of the G5SC. DFS slave
devices being in an active session with a DSF master device shall be instructed by the DSF master device in the active
G5SC about a required change of frequency of the G5SC.
DFS slave devices are restricted to have a maximum EIRP of 200 mW and do not have to implement radar
detection [2].
4.4 Distributed congestion control
ITS applications, in particular safety-related applications, have high requirements on the reliability and the latency of
the data transmission. Considering the limited bandwidth of ITS-G5A, data load on the wireless channels can exceed
the available capacity in some situations.
Distributed Co
...

SLOVENSKI STANDARD
SIST ES 202 663 V1.1.0:2011
01-junij-2011
,QWHOLJHQWQLWUDQVSRUWQLVLVWHPL,76(YURSVNLVWDQGDUG]DSURILOIL]LþQHSODVWLLQ
SODVWLNUPLOMHQMDGRVWRSDGRPHGLMDLQWHOLJHQWQLKWUDQVSRUWQLKVLVWHPRYNL
REUDWXMHMRYIUHNYHQþQHPSDVX*+]
Intelligent Transport Systems (ITS) - European profile standard for the physical and
medium access control layer of Intelligent Transport Systems operating in the 5 GHz
frequency band
Ta slovenski standard je istoveten z: ES 202 663 Version 1.1.0
ICS:
35.100.10 )L]LþQLVORM Physical layer
35.240.60 Uporabniške rešitve IT v IT applications in transport
transportu in trgovini and trade
SIST ES 202 663 V1.1.0:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ES 202 663 V1.1.0:2011

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SIST ES 202 663 V1.1.0:2011

ETSI ES 202 663 V1.1.0 (2010-01)
ETSI Standard


Intelligent Transport Systems (ITS);
European profile standard for the physical and
medium access control layer of
Intelligent Transport Systems operating
in the 5 GHz frequency band

---------------------- Page: 3 ----------------------

SIST ES 202 663 V1.1.0:2011
 2 ETSI ES 202 663 V1.1.0 (2010-01)



Reference
DES/ITS-0040015
Keywords
ITS, layer 1, layer 2, MAC, profile
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2010.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

---------------------- Page: 4 ----------------------

SIST ES 202 663 V1.1.0:2011
 3 ETSI ES 202 663 V1.1.0 (2010-01)
Contents
Intellectual Property Rights . 5
Foreword . 5
Introduction . 5
1 Scope . 6
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Definitions, symbols and abbreviations . 9
3.1 Definitions . 9
3.2 Symbols . 9
3.3 Abbreviations . 9
4 General requirements . 9
4.1 ITS station reference architecture . 9
4.2 ITS-G5 mode of operation. 10
4.3 Operations in ITS-G5C . 11
4.4 Distributed congestion control . 11
4.5 Quality of service based on user priority . 11
5 Physical layer . 12
5.1 General requirements . 12
5.2 Frequency allocation . 12
5.3 Channel allocation . 13
5.4 Transmit power control . 14
5.5 Receiver performance . 14
6 Medium access control sub-layer . 15
6.1 General requirements . 15
6.2 Frame format . 15
6.3 MAC header . 15
6.3.1 Header structure . 15
6.3.2 Frame control field. 16
6.3.2.1 Structure . 16
6.3.2.2 Type and subtype . 16
6.3.2.3 To DS and From DS . 16
6.3.2.4 Fragmentation . 16
6.3.2.5 Power management . 16
6.3.2.6 Protected frame . 16
6.3.3 Address fields . 17
6.3.4 QoS control field . 17
6.4 MAC addressing . 17
6.5 Quality of service . 17
6.6 Dynamic frequency selection . 18
7 Management . 18
7.1 General requirements . 18
7.2 Management information base . 18
7.2 Management service access points . 18
7.3 Regulatory domain . 18
7.4 Power management . 19
8 Conformance and test methods . 19
Annex A (normative): Parameters . 20
A.1 IEEE802dot11-MIB attribute values . 20
ETSI

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SIST ES 202 663 V1.1.0:2011
 4 ETSI ES 202 663 V1.1.0 (2010-01)
A.2 ITS-G5 specific MIB attribute types . 20
A.3 ITS-G5 specific MIB attributes . 21
Annex B (normative): ASN.1 modules . 22
B.1 Modules . 22
B.1.1 IEEE 802.11 . 22
B.1.2 ES 202 663 . 22
Annex C (informative): MAC data services . 23
C.1 Semantics of the data service primitives . 23
C.2 MA-UNITDATA.request . 23
C.3 MA-UNITDATA.indication . 23
C.4 MA-UNITDATA.confirm . 24
Annex D (informative): Management SAP . . 25
D.1 General . 25
D.2 MLME-SAP . 25
Annex E (informative): Bibliography . 26
History . 27

ETSI

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SIST ES 202 663 V1.1.0:2011
 5 ETSI ES 202 663 V1.1.0 (2010-01)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This ETSI Standard (ES) has been produced by ETSI Technical Committee Intelligent Transport System (ITS).
Introduction
Intelligent Transport Systems (ITS) are being developed in all regions by standard institutes, industry initiatives and
research activities.
The present document provides the European profile standard for communications in the 5 GHz band. The work is
based on the published IEEE standard 802.11 [3] and on developments at IEEE on the amendment 802.11p [i.5].
The functionality specified in the present document is named "ITS-G5" and distinguishes several frequency ranges. It
covers the physical layer and parts of the data link layer, i.e. the medium access control sub-layer and extensions to
handle parameters of these layers to be used on a per-MSDU basis, including the related management.
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1 Scope
The present document specifies the European profile in line with [i.10] of the physical and medium access control
sub-layer of 5 GHz intelligent transport systems (ITS) using IEEE 802.11 [3] as the base standard. It covers the
frequency ranges:
• ITS-G5A: Operation of ITS-G5 in European ITS frequency bands dedicated to ITS for safety related
applications in the frequency range 5,875 GHz to 5,905 GHz.
• ITS-G5B: Operation in European ITS frequency bands dedicated to ITS non- safety applications in the
frequency range 5,855 GHz to 5,875 GHz.
• ITS-G5C: Operation of ITS applications in the frequency range 5,470 GHz to 5,725 GHz.
One of the additionally selected functionalities being an essential part of the present document is "communication
outside the context of a BSS" as currently being developed by IEEE 802.11 Task Group p [3].
Communication outside the context of a BSS enables exchange of data frames between stations that are not members of
a BSS. This type of communication allows for immediate exchange of data frames, avoiding the latency associated with
the establishment of a BSS.
The present document covers the following IEEE 802.11 [3] services:
• spectrum management services (DFS, uniform spreading) for ITS-G5C;
• transmit power control;
• traffic differentiation and QoS support;
• selected MAC data services: DCF, EDCA, fragmentation/de-fragmentation (the latter only for ITS-G5C);
• selected MAC control services: ACK, RTS, CTS;
• selected MAC management services: selected action frames (spectrum management action frames);
• OFDM PHY.
The profile excludes the following IEEE 802.11 [3] features:
• association services;
• access control and data confidentiality services;
• higher-layer timer synchronization;
• selected MAC data services, i.e. PCF, HCF HCCA;
• selected MAC control services, i.e. PS-Poll, CF-End, CF-End + CF-Ack, Block Ack Request/Block Ack;
• selected MAC management services, i.e. beacon, ATIM, disassociation, association request/response,
re-association request/response, probe request/response, authentication, de-authentication, selected action
(measurement request/report);
• power management services.
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2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://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.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ETSI EN 302 571 (V1.1.1): "Intelligent Transport Systems (ITS); Radiocommunications
equipment operating in the 5 855 MHz to 5 925 MHz frequency band; Harmonized EN covering
the essential requirements of article 3.2 of the R&TTE Directive".
[2] ETSI EN 301 893 (V1.5.1): "Broadband Radio Access Networks (BRAN); 5 GHz high
performance RLAN; Harmonized EN covering the essential requirements of article 3.2 of the
R&TTE Directive".
[3] IEEE 802.11:2007: "IEEE Standard for Information Technology-Telecommunications and
information exchange between systems-Local and metropolitan area networks-Specific
requirements; Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)
Specifications".
NOTE: Amendments to this standard are considered in [i.1] and [i.2] which are essential to understand the
sources from which some of the functionality in the present document is derived.
[4] IEEE Std 802-2001: "IEEE Standard for Local and Metropolitan Area Networks: Overview and
Architecture".
[5] ANSI/IEEE Std 802.2:1998: "Information technology -- Telecommunications and information
exchange between systems -- Local and metropolitan area networks -- Specific requirements --
Part 2: Logical Link control".
[6] ISO/IEC 7498-1:1994: "Information technology - Open Systems Interconnection - Basic
Reference Model: The Basic Model".
[7] ITU-T Recommendation X.691 (2002): "Information technology - ASN.1 encoding rules:
Specification of Packed Encoding Rules (PER)".
[8] IEEE P802.11k (2008): "IEEE Standard for Information technology - Telecommunications and
information exchange between systems - Local and metropolitan area networks - Specific
requirements Part 11: Wireless LAN Medium Access Control (MAC)and Physical Layer (PHY)
Specifications Amendment 1: Radio Resource Measurement of Wireless LANs".
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2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.3] ETSI TR 102 654 (V1.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Road Transport and Traffic Telematics (RTTT); Co-location and Co-existence Considerations
regarding Dedicated Short Range Communication (DSRC) transmission equipment and Intelligent
Transport Systems (ITS) operating in the 5 GHz frequency range and other potential sources of
interference".
[i.4] ETSI EN 300 674 (all parts): "ElectroMagnetic Compatibility and Radio Spectrum Matters
(ERM); Road Transport and Traffic Telematics (RTTT); Technical characteristics and test
methods for Dedicated Short Range Communication (DSRC) transmission equipment (500 kbit/s /
250 kbit/s) operating in the 5,8 GHz Industrial, Scientific and Medical (ISM) band".
[i.5] IEEE P802.11pTM/D8.0:2009: "Draft Standard for Information Technology -
Telecommunications and information exchange between systems - Local and metropolitan area
networks - Specific requirements - Part 11: Wireless LAN Medium Access Control (MAC) and
Physical Layer (PHY) specifications; Amendment 7: Wireless Access in Vehicular
Environments".
[i.6] ECC/DEC/(08)01: "ECC Decision of 14 March 2008 on the harmonised use of the
5875-5925 MHz frequency band for Intelligent Transport Systems (ITS)".
[i.7] ECC/REC/(08)01: "ECC Recommendation (08)01 on the use of the band 5855-5875 MHz for
Intelligent Transport Systems (ITS)".
[i.8] ERC/DEC(99)23: "ERC Decision of 29 November 1999 on the harmonised frequency bands to be
designated for the introduction of High Performance Radio Local Area Networks (HIPERLANs)".
[i.9] ECC/DEC(02)01: "ECC Decision of 15 March 2002 on the frequency bands to be designated for
the co-ordinated introduction of Road Transport and Traffic Telematic Systems".
[i.10] ETSI ETS 300 406 (edition 1): "Methods for Testing and Specification (MTS); Protocol and
profile conformance testing specifications; Standardization methodology".
[i.11] Commission Decision 2005/513/EC of 11 July2005 on the harmonised use of radio spectrum in
the 5 GHz frequency band for the implementation of wireless access systems including radio local
area networks (WAS/RLANs).
[i.12] Commission Decision 2007/90/EC of 12 February 2007 amending Decision 2005/513/EC on the
harmonised use of radio spectrum in the 5 GHz frequency band for the implementation of Wireless
Access Systems including Radio Local Area Networks (WAS/RLANs).
[i.13] Commission Decision 2008/671/EC of 5 August 2008 on the harmonised use of radio spectrum in
the 5 875-5 905 MHz frequency band for safety-related applications of Intelligent Transport
Systems (ITS).
[i.14] ETSI TS 102 687 (V1.1.1): "Intelligent Transport Systems (ITS); Transmitter Power Control
Mechanism for Intelligent Transport Systems operating in the 5 GHz range".
[i.15] ETSI TS 102 723-3: "Intelligent Transport Systems; OSI cross-layer topics; Part 3: Interface
between management entity and access layer".
[i.16] ETSI TS 102 665 (V1.1.1): "Intelligent Transport Systems (ITS); Vehicular Communications;
Architecture".
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3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in [1], [2], [3], [4], [5], [6], [7], [8], [i.17] and
the following apply:
ITS-G5: set of protocols and parameters as specified in the present document
ITS-G5 Control Channel: physical channel as defined in clause 5.3
ITS-G5 Service Channel: any other physical channel than the ITS-G5 Control Channel as defined in clause 5.3
ITS-G5 STA: device that contains an ITS-G5
3.2 Symbols
For the purposes of the present document, the following symbols apply:
'00101100'b notation used for numeric values presented in binary numeral system
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in [1], [2], [3], [4], [5], [6], [7], [8], [i.18] and the
following apply:
DCC Decentralized Congestion Control
G5CC ITS-G5 Control Channel
G5SC ITS-G5 Service Channel
ITS-G5A Frequency band ranging from 5,875 GHz to 5,905 GHz
NOTE: Dedicated to ITS for safety related applications.
ITS-G5B Frequency band ranging from 5,855 GHz to 5,875 GHz
NOTE: Dedicated to ITS non-safety applications.
ITS-G5C Frequency band ranging from 5,470 GHz to 5,725 GHz
NOTE: Used for ITS applications.
4 General requirements
4.1 ITS station reference architecture
Figure 1 shows the part of the ITS AL that is covered by the present document. It is based on the OSI layered
communications model with a detailed view of the ITS Access Technology layer.The mapping between the ITS-G5
elements specified in the present document and the ITS AL model is shown in figure 1.
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Figure 1: Access layer with ITS-G5 MAC and PHY
The present document specifies the following elements of ITS-G5: a physical layer, a medium access control sub-layer,
a MAC sub-layer Management Entity (MLME) and a Physical Layer Management entity (PLME). ITS-G5 also
includes the SAPs MAC_SAP and MLME_SAP (depicted in black in figure 1). The internal SAPs PHY_SAP and
PMD_SAP (depicted in white in figure 1) are not part of ITS-G5 specification, which implies that an ITS-G5 STA may
not implement these SAPs. However, a STA implementing these SAPs in compliance with 802.11 [3] is also considered
compliant to ITS-G5.
In figure 1 the ITS-G5 physical layer is composed of the two sub-layers PLCP and PMD. The distinction of the two
sub-layers is only presented for homogeneity with [3]. In fact, ITS-G5 only supports the OFDM PHY specification.
Consequently, ITS-G5 STAs may not have the two sub-layers PLCP and PMD and, instead, may have one single
physical layer.
As compared to [3], ITS-G5 does not provide the SME-PLME_SAP. Consequently, only the MLME can access the
PHY MIB via the MLME-PLME_SAP. The MLME-PLME_SAP is therefore part of ITS-G5 (see annex D).
The MLME SAP can be identical to the MI-SAP in [i.16].
NOTE: The general approach is going to be described in TS 102 723-3 [i.15].
ITS-G5 MAC_SAP, MLME_SAP and MLME-PLME_SAP shall be compliant with the correspondent SAPs of
IEEE 802.11 [3] with restrictions and amendments as specified in the present document. In particular, the present
document specifies amendments to the MAC_SAP (see annex C), whereas the ITS-G5 MLME_SAP (see annex D) is a
subset of the IEEE 802.11 [3] MLME_SAP. No amendments nor subset are specified for the MLME-PLME_SAP.
With respect to the ITS AL model depicted in figure 1, ITS-G5 MLME_SAP is the subset of the IM-SAP that
represents the management SAP for ITS-G5 interfaces. The MAC_SAP is not matched by a correspondent SAP in the
ITS AL model. The MAC_SAP is used by the ITS-G5 LLC layer that is out of scope of the present document.
4.2 ITS-G5 mode of operation
An ITS-G5 STA shall operate outside the context of a BSS.
NOTE: The mode of operation outside the context of a BSS is drafted in [i.5]. Consequently, the MAC services
SCAN, JOIN, ASSOCIATE, AUTHENTICATE are not applicable.
All ITS-G5 STAs operating on ITS-G5A and ITS-G5B are treated equally as peer stations, disregard whether they are
fixed or mobile.
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For operation in ITS-G5C, a distinction between fixed and mobile ITS-G5 STAs is made in order to apply spectrum
management based on DFS. Mobile ITS-G5 STAs act as DFS slaves and fixed ITS-G5 STAs as DFS masters.
4.3 Operations in ITS-G5C
The Commission Decisions [i.11] and [i.12] regulate the usage of the 5 GHz frequency band for wireless access systems
and radio local area networks. Operation in the RLAN band, see figure 2 and [2], requires Transmit Power Control
(TPC), a procedure for Dynamic Frequency Selection (DFS) and uniform spreading to detect signals from radar systems
and avoid co-channel operation with these systems; provide on aggregate a near-uniform loading of the spectrum,
i.e. uniform spreading.
NOTE: RLAN also is referred to as WLAN. These requirements apply to all types of RLAN devices regardless of
the type of communication between these devices.
In order to
...