ETSI TS 102 890-1 V1.1.1 (2017-05)

Intelligent Transport Systems (ITS); Facilities layer function; Part 1: Services Announcement (SA) specification

DTS/ITS-0020044

General Information

• Status: Published
• Publication Date: 18-May-2017
• Technical Committee: ITS WG2 - Architecture and Cross Layer
• Current Stage: 12 - Completion
• Due Date: 22-May-2017
• Completion Date: 19-May-2017

Standards Content (Sample)

ETSI TS 102 890-1 V1.1.1 (2017-05)






TECHNICAL SPECIFICATION
Intelligent Transport Systems (ITS);
Facilities layer function;
Part 1: Services Announcement (SA) specification

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2 ETSI TS 102 890-1 V1.1.1 (2017-05)



Reference
DTS/ITS-0020044
Keywords
interoperability, ITS, service, validation
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3 ETSI TS 102 890-1 V1.1.1 (2017-05)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
Introduction . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definitions, symbols and abbreviations . 6
3.1 Definitions . 6
3.2 Symbols . 7
3.3 Abbreviations . 7
4 SA functional description . 8
4.1 SA functional architecture . 8
4.2 Interfaces of the SA service . 9
4.2.1 Interface between Application entity and Management entity . 9
4.2.2 Interface between Facilities layer and the Management entity . 10
4.2.3 Interface between Facilities layer and the Security entity . 11
4.2.4 Interface between Facilities layer and the Networking &Transport layer . 11
5 SAEM format . 11
5.1 General . 11
5.2 Service info component . 12
5.3 Channel info component . 12
5.4 IPv6 routing advertisement. 12
6 SAEM dissemination . 13
6.1 Identification . 13
6.2 SA service trigger, update, repetition and termination . 13
6.3 SA service communication requirements . 13
6.4 SA Application Identifier (AID) . 14
6.5 SA Service Specific Permissions (SSP) . 14
Annex A (normative): ASN.1 specification of SAEM . 15
Annex B (normative): ASN.1 specification of extensions . 16
B.1 General . 16
B.2 ChannelInfo extensions . 16
B.2.1 ProtocolType extension . 16
History . 17

ETSI

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4 ETSI TS 102 890-1 V1.1.1 (2017-05)
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 (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.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Intelligent Transport Systems
(ITS).
The present document is part 1 of a multi-part deliverable covering Intelligent Transport Systems; Facilities layer
function, as identified below:
Part 1: "Services Announcement (SA) specification";
Part 2: "Position and time facility specification".
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.
Introduction
Some of the applications of the Basic Set of Applications (see ETSI TR 102 638 [i.1]) require ITS stations (Service
Users) to have knowledge of a certain service of interest that is provided by other ITS stations (Service Providers) via
defined communication access technologies.
The C-ITS protocol stack supports push and pull mechanisms in order to allow an ITS station to identify the availability
of ITS services. The push mechanism is named "ITS service announcement" which is also known as "ITS service
advertisement" (see ETSI EN 302 665 [i.2]). Throughout this document this service is referred to as service
announcement service (SA service).
The ITS SA service is a functionality agnostic to the medium and the announced service that can be used by specific
services to provide the push functionality mentioned above. In this sense, each specification of an ITS service will tailor
the ITS service announcement to its needs. This means that ITS service definitions (e.g. in other standards or technical
specifications) should make use of the provisions of the present document to define its service-specific use of ITS
service announcement, i.e. to profile the ITS service announcement appropriately (for example the use of service
announcement in a Platooning service). The present document defines therefore a general framework which needs to be
followed whenever a specific service is specified. Compliance should be tested according to this service specification
that defines the application-specific requirements for the service announcement.
ETSI

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5 ETSI TS 102 890-1 V1.1.1 (2017-05)
1 Scope
The present document provides the specification of the Services Announcement (SA) service, including its protocol
functions, based on ISO/TS 16460 [1].
The definition of the interface between Service Provider and Service Announcer ITS stations (ITS-S) as well as of the
communication steps following the service announcement protocol procedure and related protocol details between
Service Announcer and Service User ITS-S are application-specific are not covered by the present document.
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] ISO/TS 16460:2016: "Intelligent transport systems -- Communications access for land mobiles
(CALM) -- Communications protocol messages for global usage".
[2] ETSI TS 102 894-2: "Intelligent Transport Systems (ITS); Users and applications requirements;
Part 2: Applications and facilities layer common data dictionary".
[3] ETSI EN 302 636-4-1: "Intelligent Transport Systems (ITS); Vehicular Communications;
GeoNetworking; Part 4: Geographical addressing and forwarding for point-to-point and point-to-
multipoint communications; Sub-part 1: Media-Independent Functionality".
[4] ETSI TS 103 097 (V1.2.1): "Intelligent Transport Systems (ITS); Security; Security header and
certificate formats".
[5] ETSI EN 302 931 (V1.1.1): "Intelligent Transport Systems (ITS); Vehicular Communications;
Geographical Area Definition".
[6] Recommendation ITU-T X.691/ISO/IEC 8825-2 (2015): "Information technology - ASN.1
encoding rules: Specification of Packed Encoding Rules (PER)".
[7] ETSI TS 102 965: "Intelligent Transport Systems (ITS); Application Object Identifier (ITS-AID);
Registration".
[8] ETSI TS 103 248: "Intelligent Transport Systems (ITS); GeoNetworking; Port Numbers for the
Basic Transport Protocol (BTP)".
[9] IEEE 1609.3™ - 2016: "IEEE Standard for Wireless Access in Vehicular Environments (WAVE)
- Networking Services".
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.
ETSI

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6 ETSI TS 102 890-1 V1.1.1 (2017-05)
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 TR 102 638 (V1.1.1): "Intelligent Transport Systems (ITS); Vehicular Communications;
Basic Set of Applications; Definitions".
[i.2] ETSI EN 302 665 (V1.1.1): "Intelligent Transport Systems (ITS); Communications Architecture".
[i.3] ISO/TS 17423:2014: "Intelligent transport systems -- Cooperative systems -- ITS application
requirements and objectives for selection of communication profiles".
[i.4] ETSI TS 102 723-11: "Intelligent Transport Systems (ITS); OSI cross-layer topics; Part 11:
Interface between networking and transport layer and facilities layer".
[i.5] ETSI TS 102 723-5 (V1.1.1): "Intelligent Transport Systems (ITS); OSI cross-layer topics; Part 5:
Interface between management entity and facilities layer".
[i.6] ETSI EN 302 636-5-1: "Intelligent Transport Systems (ITS); Vehicular Communications;
GeoNetworking; Part 5: Transport Protocols; Sub-part 1: Basic Transport Protocol".
[i.7] ETSI TS 103 301: "Intelligent Transport Systems (ITS); Vehicular Communications; Basic Set of
Applications; Facilities layer protocols and communication requirements for infrastructure
services".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
ITS application: association of two or more complementary ITS-S applications
ITS-S application: fragment of an ITS application available at an ITS-S that uses ITS-S services to connect to one or
more other fragments of the same ITS application
ITS-S gateway: gateway functionality based on the ITS-S reference architecture
ITS-S router: routing functionality based on the ITS-S reference architecture
ITS service: service provided by an ITS application to the user of ITS
ITS-S service: communication functionality offered by an ITS-S to an ITS-S application
Services announcement: provision, via an ITS communication functionality, of information about an ITS service
NOTE: Such information can include the ITS service identity, availability and communication details.
Service announcer ITS-S: ITS-S that announces services on behalf of the service provider ITS-S by transmitting
SAEM
Service provider ITS-S: ITS-S that provides remote or local ITS services
Service user ITS-S: consumer of ITS services monitoring SAEM for an announced ITS service opportunity of interest
NOTE: These definitions are in line with ETSI EN 302 665 [i.2].
ETSI

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3.2 Symbols
For the purposes of the present document, the following symbols apply:
changeCount Component of samBody
channelIndex Component of ServiceInfo pointer to ChannelInfo
ChannelInfo Datatype of channelInfos list entry
channelInfos Component of samBody
chOptions Component of ServiceInfo
contentCount Component of changeCount
defaultGateway Component of routingAdvertisement
ExtendedChannelInfos Component of extensions of samBody
extensions Component of samBody
GatewayMACaddress Component of routingAdvertisement
IPv6Address Component of chOptions
ItsPduHeader Header component of the SAEM
messageID Component of the ItsPduHeader
protocolType Component of chOptions
protocolVersion Component of the ItsPduHeader
ProviderMACaddress Component of chOptions
routingAdvertisement Component of samBody
saID Component of changeCount
sam Component of the SAEM
Sam Datatype specified in ISO/TS 16460 [1]
samBody Component of sam
serviceID Component of ServiceInfo
ServiceInfo Datatype of serviceInfos list entry
serviceInfos Component of samBody
serviceProviderPort Unused component of chOptions
SrvAdvChangeCount Datatype of changeCount
stationID Component of the ItsPduHeader
systemService Unused component of chOptions
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AID Application Identifier
API Application Programming Interface
ASN Abstract Syntax Notation
BTP Basic Transport Protocol
C-ITS Cooperative ITS
GN GeoNetworking
ID Identifier
IETF Internet Engineering Task Force
IP Internet Protocol
IPv6 Internet Protocol Version 6
ISO International Organization for Standardization
ITS Intelligent Transport System
ITS-S ITS Station
ITU-T International Telecommunication Union - Telecommunication Standardization Sector
MAC Medium Access Control
MA-SAP Management to Application Service Access Point
MDA Minimum Dissemination Area
MF Management to Facilities
MF-SAP Management to Facilities Service Access Point
NF Networking & Transport to Facilities
NF-SAP Networking & Transport to Facilities Service Access Point
PER Packed Encoding Rules
RX Reception
SA Services Announcement
ETSI

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SAEM Services Announcement Extended Messa
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