ETSI TS 103 574 V1.1.1 (2018-11)

Intelligent Transport Systems (ITS); Congestion Control Mechanisms for C-V2X PC5 interface; Access layer part

DTS/ITS-00445

General Information

• Status: Published
• Publication Date: 11-Nov-2018
• Technical Committee: ITS WG4 - Media and Medium related
• Current Stage: 12 - Completion
• Due Date: 20-Nov-2018
• Completion Date: 12-Nov-2018

Standards Content (Sample)

ETSI TS 103 574 V1.1.1 (2018-11)






TECHNICAL SPECIFICATION
Intelligent Transport Systems (ITS);
Congestion Control Mechanisms for the C-V2X PC5 interface;
Access layer part

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2 ETSI TS 103 574 V1.1.1 (2018-11)



Reference
DTS/ITS-00445
Keywords
ITS, radio
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3 ETSI TS 103 574 V1.1.1 (2018-11)
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 and abbreviations . 6
3.1 Terms . 6
3.2 Abbreviations . 6
4 Congestion Control Overview . 6
4.1 Introduction . 6
4.2 Operational requirements . 7
4.3 Congestion control architecture . 7
4.4 Default parameters for mode 4 . 8
5 Control mechanism . 8
5.1 Calculation of CR . 8
5.2 Calculation of CBR . 9
5.3 Other considerations . 9
6 Congestion Control Process and data exchange . 10
6.1 Introduction . 10
6.2 Algorithm/flowchart (informative) . 10
6.3 Data exchange between access layer congestion control and Congestion Control Management Entity . 10
6.4 Data exchanged between Congestion Control Management Entity and Facilities and Network/transport
layers . 11
History . 12


ETSI

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4 ETSI TS 103 574 V1.1.1 (2018-11)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (https://ipr.etsi.org/).
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.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Intelligent Transport Systems
(ITS).
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

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5 ETSI TS 103 574 V1.1.1 (2018-11)
1 Scope
The present document is the LTE-V2X intra-system congestion control specification. It describes the LTE-V2X
PHY/MAC layer intra-system congestion control techniques as per Release 14 3GPP RAN specifications and includes
interfaces to a congestion control management entity.
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 TS 136 300 (V14.7.0): "LTE; Evolved Universal Terrestrial Radio Access (E-UTRA) and
Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2
(3GPP TS 36.300 version 14.7.0 Release 14)".
[2] ETSI TS 136 321 (V14.7.0): "LTE; Evolved Universal Terrestrial Radio Access (E-UTRA);
Medium Access Control (MAC) protocol specification (3GPP TS 36.321 version 14.7.0
Release 14)".
[3] ETSI TS 136 331 (V14.6.2): "LTE; Evolved Universal Terrestrial Radio Access (E-UTRA); Radio
Resource Control (RRC); Protocol specification (3GPP TS 36.331 version 14.6.2 Release 14)".
[4] ETSI TS 136 214 (V14.4.0): "LTE; Evolved Universal Terrestrial Radio Access (E-UTRA);
Physical layer; Measurements (3GPP TS 36.214 version 14.4.0 Release 14)".
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] ETSI TS 103 613 (V1.1.1): "Intelligent Transport Systems (ITS); Access layer specification for
Intelligent Transport Systems using LTE Vehicle to everything communication in the 5,9 GHz
frequency band".
[i.2] ETSI TS 136 101 (V14.7.0): "LTE; Evolved Universal Terrestrial Radio Access (E-UTRA); User
Equipment (UE) radio transmission and reception (3GPP TS 36.101 version 14.7.0 Release 14)".
ETSI

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6 ETSI TS 103 574 V1.1.1 (2018-11)
3 Definition of terms and abbreviations
3.1 Terms
For the purposes of the present documen
...