ETSI TS 101 556-2 V1.1.1 (2016-02)

Intelligent Transport Systems (ITS); Infrastructure to Vehicle Communication; Part 2: Communication system specification to support application requirements for Tyre Information System (TIS) and Tyre Pressure Gauge (TPG) interoperability

DTS/ITS-0010030

General Information

• Status: Published
• Publication Date: 02-Feb-2016
• Technical Committee: ITS WG1 - Application Requirements and Services
• Current Stage: 12 - Completion
• Due Date: 21-Jan-2016
• Completion Date: 03-Feb-2016

Standards Content (Sample)

ETSI TS 101 556-2 V1.1.1 (2016-02)






TECHNICAL SPECIFICATION
Intelligent Transport Systems (ITS);
Infrastructure to Vehicle Communication;
Part 2: Communication system specification to support
application requirements for
Tyre Information System (TIS) and
Tyre Pressure Gauge (TPG) interoperability

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2 ETSI TS 101 556-2 V1.1.1 (2016-02)



Reference
DTS/ITS-0010030
Keywords
application, interoperability, ITS, safety, transport
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3 ETSI TS 101 556-2 V1.1.1 (2016-02)
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 . 6
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 6
4 TIS, TPG application description . 7
4.0 Introduction . 7
4.1 Application context overview. 7
4.2 Application evolution steps . 8
4.3 TPG discovery process . 9
4.4 TIS and TPG pairing . 11
4.5 Tyre refilling process . 11
5 Communication system functional requirements . 12
5.0 General requirements . 12
5.0.1 Introduction. 12
5.0.2 Encoding rules . 12
5.0.3 Message format ASN.1 representation . 12
5.1 TPG discovery protocol and messages specification . 12
5.1.1 Request based discovery . 12
5.1.1.1 Vehicle request for local discovery . 12
5.1.1.2 Vehicle request via Internet. 12
5.1.1.3 General protocol operation . 13
5.1.1.4 DRM data structure . 13
5.1.2 Notification from road side ITS-S or from central ITS-S . 14
5.1.2.1 General protocol operation . 14
5.1.2.2 SNM data structure . 15
5.3 TPG reservation protocol and message specification . 16
5.3.0 General protocol operation . 16
5.3.1 TRM data structure . 17
5.3.2 TCM data structure . 18
5.4 TIS - TPG pairing . 19
5.5 TIS - TPG communication protocol and messages specification during tyres refilling . 20
5.5.0 General protocol operation . 20
5.5.1 VDRM data structure . 20
5.5.2 VDPM data structure . 21
5.5.3 EOFM data structure . 24
6 Communication system operational requirements . 25
6.1 Security requirements . 25
6.2 System performances requirements . 25
6.2.1 Void . 25
6.2.2 Messages broadcasting frequencies . 25
Annex A (normative): ASN.1 message descriptions . 26
History . 31

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4 ETSI TS 101 556-2 V1.1.1 (2016-02)
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 2 of a multi-part deliverable covering Infrastructure to Vehicle Communication as
identified below:
Part 1: "Electric Vehicle Charging Spot Notification Specification";
Part 2: "Communication system specification to support application requirements for Tyre Information
System (TIS) and Tyre Pressure Gauge (TPG) interoperability";
Part 3: "Communications system for the planning and reservation of EV energy supply using wireless networks".
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
ITS stations are interacting together to satisfy a large diversity of customers' services.
The present document is developed in relation to the European Commission Mandate M/457 and in cooperation with
CEN TC 301 TF2b.
Any communication technology enabling I2V communication can be supporting this application as long as the Tyre
Pressure Monitoring System application functional and operational requirements are satisfied.
This TPMS application belongs to road safety application class but also to sustainability class through the possible CO
2
reduction provided that the vehicle tyres pressures are properly adjusted.
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5 ETSI TS 101 556-2 V1.1.1 (2016-02)
1 Scope
The present document provides a specification of the communication system required to support the requirements of
Tyre Information System (TIS) application, TPG (Tyre Pressure Gauge) application and TPG operator application.
The TIS application has the objective to monitor in real time the pressure of the vehicle tyres, to advise the driver and to
support him for the tyre(s) refilling if one or several tyre(s) are not at the recommended pressure. TPG application and
TPG operator application have the objective to notify the TPG to road users and provide tyre pressure refilling service
to vehicles, either manually, or automatically. Consequently, the communication system specification considers the
various phases of the driver support process starting with the provisioning of available Tyre Pressure Gauge (TPG)
locations, pairing the vehicle with a selected TPG and ensuring the data elements exchange required for the selected
TPG to refill the concerned tyre(s) until reaching recommended pressure(s).
The present document is developed in accordance with requirements defined in CEN EN 16661 [1].
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
reference document (including any amendments) applies.
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.
The following referenced documents are necessary for the application of the present document.
[1] CEN EN 16661:2015: "Road vehicles and Tyre Pressure Gauges (TPG) - Interoperability between
Tyre Information Systems (TIS) and TPG - Interfaces and Requirements".
[2] ETSI EN 302 665 (V1.1.1): "Intelligent Transport Systems (ITS); Communications architecture".
[3] ECE/TRANS/WP.29/78/Rev.2: "United Nations Economic and Social Council; Economic
Commission for Europe; Consolidated Resolution on the Construction of Vehicles (R.E.3);
Revision 2".
NOTE: Available at: http://www.unece.org/fileadmin/DAM/trans/main/wp29/wp29resolutions/ECE-TRANS-
WP29-78-r2e.pdf
[4] ETSI TS 101 556-1: "Intelligent Transport Systems (ITS); Infrastructure to Vehicle
Communication; Electric Vehicle Charging Spot Notification Specification".
[5] 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".
[6] ISO 639-1:2002: "Codes for the representation of names of languages - Part 1: Alpha-2 code".
[7] ISO/IEC 8825-2:2008: "Information technology - ASN.1 encoding rules: Specification of Packed
Encoding Rules (PER)".
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6 ETSI TS 101 556-2 V1.1.1 (2016-02)
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
reference 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] IEEE 802.11p™: "802.11p-2010 - IEEE Standard for Information technology - Local and
metropolitan area networks - Specific requirements - Part 11: Wireless LAN Medium Access
Control (MAC) and Physical Layer (PHY) Specifications Amendment 6: Wireless Access in
Vehicular Environments".
[i.2] ETSI TS 103 097: "Intelligent Transport Systems (ITS); Security; Security header and certificate
formats".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in CEN EN 16661 [1], ETSI EN 302 665 [2]
and the following apply:
TIS application: vehicle ITS-S application implementing the application logic to trigger, manage and terminate the
data exchange between vehicle ITS-S and TPG ITS Station or between vehicle ITS-S and TPG operator
TPG application: ITS-S application embedded at TPG ITS Station implementing application logic to trigger, manage
and terminate the data exchange between TPG ITS-S and vehicle ITS-S, or between TPG ITS-S and TPG operator
TPG operator: operator in charge of managing at least one or a set of TPGs for at least one of the maintenance,
operation, and/or reservation services
NOTE: Functionalities of the TPG operator may be embedded in TPG ITS-S or at central ITS-S.
TPG station: local facility that provides tyre pressure refilling service and is equipped with at least one TPG
NOTE 1: One TPG station may include more than one TPG.
NOTE 2: Typically, a TPG station includes other local facilities to support the tyre pressure refilling service
provisioning, e.g. parking facilities, access control facilities. A TPG station may be combined with other
local facilities such as parking station, public transport stations, etc.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AAA Authentication, Authorization, Accounting/Auditing
ASN.1 Abstract Syntax Notation One
DE Date Element
DRM Discovery Request Message
EOFM End Of File Message
HMI Human - Machine Interface
ITS Intelligent Transport System
ITS-G5 Intelligent Transport System - Frequency band comprised between 5 855 MHz to 5 925 MHz
ITS-S ITS station
MAC Medium Access Control
PDU Protocol Data Unit
PER Packet Encoding Rules
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7 ETSI TS 101 556-2 V1.1.1 (2016-02)
TCM TPG reservation Confirmation Message
SNM Service Notification Message
TRM TPG Reservation Message
TIN Tyre Identification Number.
TIS Tyre Information System
TPG Tyre Pressure Gauge
TPMS Tyre Pressure Monitoring System
URL Uniform Resource Location
VDPM Vehicle Data Provisioning Message
VDRM Vehicle Data Request Message
WFC Wheel Fitted Component
4 TIS, TPG application description
4.0 Introduction
The TIS application targets at improving the driving safety through the monitoring and adjustment of the vehicles' tyres
pressures in case of unadapted pressure or under driver request. Moreover, the TIS application also contributes to
reduce the CO emissions for thermal propulsion vehicles since unadapted tyres' pressures also impact the vehicle fuel
2
consumption. The tyre pressure refilling service is provided by a TPG to a vehicle. It may be realized manually or
automatically, as defined in CEN EN 16661 [1]. For automatic refilling service, vehicle provides a set of vehicle data
e.g. tyre placard table, tyre pressure level to TPG, for it to calculate the appropriate tyre pressure to be applied for
vehicle tyres.
The TIS application, TPG application and TPG operator applications interact with each other for data exchanges to
manage the TPG discovery, TPG reservation and tyre pressure refilling.
4.1 Application context overview
An example of the high level data exchanges between the TIS application, TPG application and TPG operator is
illustrated in figure 4.1.1. It includes the following sub systems:
• TIS application embedded in vehicle: it is in charge of identifying the tyre pressure event e.g. low tyre pressure
event, discovering the TPG nearby or along its itinerary, if applicable requesting the reservation of a TPG, and
providing data to TPG for refilling;
• TPG application at road side: it is in charge of exchanging data with TIS application tp manage the refilling;
• TPG operator application at central server: it is in charge of providing TPG availability information to road
users, managing the TPG reservation and managing TPGs in its operation networks.
In one possible implementation, other elements may be added to support the customers' services.
EXAMPLE: Personal ITS-S may be used for TPG discovery and reservation from user, whilst a telematics
service provider may manage some tasks for TPG operators from backend.
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TPG
ITS-S

Figure 4.1.1: TIS, TPG, and TPG operator interaction overview
When the vehicle Tyre Pressure Monitoring System (TPMS) detects an abnormal tyre pressure event
(e.g. under-inflation of one or more tyres), or when the driver wants to check or inflate at least one of its tyres, the TIS
application triggers the TPG discovery and looks for the possible nearest available TPG stations. According to its
embedded resources (communication, digital map) and available functionalities, the discovery may be realized by
initiating a discovery request to the TPG operator at central server or at TPG station, or by receiving a service
notification from the TPG operator, or by consulting the information contained in the embedded digital map containing
the TPG station information.
A road side ITS Station (ITS-S) may be directly embedded into the TPG or connected with TPGs or with TPG
operators, in order to receive real time availability information of TPGs. This road side ITS-S may be positioned on a
geographical spot near by the road network, e.g. at the entry of a city or at the entry of a highway, in order to notify the
local TPGs, their positions and availability to road users by a broadcasting service. A vehicle ITS-S may process the
received TPG service notifications for the discovery purpose, or to update the embedded digital map for later usage.
Upon the discovery of an available TPG, the driver may decide to refill the vehicle's tyre(s). If the refilling need is
confirmed, the driver may request the TIS application via the vehicle HMI to initiate the reservation of a TPG, or may
directly go to the TPG station without reservation. In both cases, the driver can be guided to the selected TPG by means
of its navigation system.
NOTE: The availability of reservation support may be included in a TPG service notification message.
Upon arrival at the TPG station, the TIS application pairs with a selected or the reserved TPG, then the TPG ITS-S
establishes a point to point communication with the vehicle ITS-S for refilling operation. Data exchange requirements
in this step is specified in CEN EN 16661 [1]. At the end of the refilling process, the TPG ITS-S sends an "End of
Pairing" message which may contain the values of the tyre pressures actually provided.
4.2 Application evolution steps
The main application evolution steps are represented in the application state diagram as illustrated in figure 4.2.1.
Consequently, the following three steps are identified for TIS application:
• The discovery step of the nearest TPG by the vehicle, triggered by the detection of an abnormal tyre pressure
event by the TPMS, or by the driver via HMI. The discovery step may further comprise an optional reservation
process to enable end user to reserve one TPG, if the reservation service is offered by the TPG operator.
• The pairing step which consists of pairing the vehicle ITS-S with the TPG ITS-S which has been
reserved/selected by the driver. This step is triggered by the driver at the arrival of the TPG.
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9 ETSI TS 101 556-2 V1.1.1 (2016-02)
• The tyre(s) refilling step which consists of adjusting the tyre(s) pressure(s) by TPG to vehicle according to
data provided by the vehicle. This step is triggered by the TPG request message to TIS and is terminated with
the reception of "end of pairing" message at vehicle ITS-S.
For the TPG application, the following steps are defined:
• Available: the TPG is available and operates correctly to provide refilling services. This step may be
triggered by local TPG (e.g. system is ignited and correctly launched), or by a remote TPG operator.
• Reserved: the TPG is reserved during a time period. The refilling service is expected to be provided to the
customer who has reserved the time slot. This step is triggered by the TPG operator that has confirmed the
reservation with one customer.
• The pairing step which consists of pairing the vehicle ITS-S with the TPG ITS-S which has been
reserved/selected by the driver. This step is triggered at the reception of the pairing data from customer or
from vehicle ITS-S.
• Refilling ready: the TPG is correctly paired with the vehicle ITS-S. The TPG is ready to serve the customer
for refilling. This step is triggered by the successful pairing and is terminated upon transmission of end of
pairing" message to vehicle ITS-S after the refilling.

Figure 4.2.1: Application state machines
The interactions between the TIS application, the TPG application and the TPG operator are classified into three
processes:
• TPG discovery process as defined in clause 4.3;
• TIS and TPG pairing process as defined in clause 4.4;
• Tyre refilling process as defined in clause 4.5.
4.3 TPG discovery process
The TPG discovery process identifies and locates one or more than one available TPGs being in the proximity of the
vehicle or of a specific geographical location indicated by the driver. Following scenarios may be used for discovery
process:
• If the vehicle is equipped with a navigation system, the TPG presence discovery may be realized by consulting
its digital map data base which contains the TPG POIs. No communication is required for this scenario.
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• A road side ITS-S broadcasts the availability of the TPG in local wireless network e.g. via ITS-G5
(IEEE 802.11p [i.1]) to oncoming vehicle ITS-Ss.
NOTE 1 : A service announcement message may be broadcasted before the transmission of the TPG service
notification message. The service announcement message announces the availability of the service
(i.e. TPG notification), and communication parameters for vehicle ITS-S to receive the service data.
NOTE 2: The specification of the service announcement message is out of scope of the present document.
• Vehicle ITS-S has Internet connectivity, it establishes communication directly with TPG operator by issuing a
request, the TPG operator replies with TPG availability in accordance to customer request conditions
e.g. search position, search range, TPG type, etc.
• The road side ITS-S provides Internet router functionalities to vehicle ITS-Ss that do not have Internet
connectivity. It routes vehicle ITS-S request to the TPG operator and forwards the replies back to the
requesting vehicle ITS-S.
NOTE 3: The availability of routing service at road side ITS-S may also be announced via a service announcement
message.
NOTE 4: Access to the TPG operator service may be subject to conditions, e.g. contract, subscription.
TPG Service Provider
Vehicle RSU
TPG service notification
TPG Discovery Request
TPG Service Notification
Router configuration
Router
TPG Discovery Request
TPG Discovery Request
TPG Service Notification
TPG Service Notification
ITS G5 Ethernet/3G

Figure 4.3.1: Examples of discovery scenarios
The discovery process enables TIS application to discover the available TPG according to its refilling needs. The
available TPGs may be shown to users via e.g. HMI or over navigation system. The user then may select one of the
available TPG as the next navigation way point.
Optionally and upon discovery of one available TPG, the customer may initiate the reservation request of a TPG if the
reservation possibility is offered by the TPG operator. The reservation is triggered by the user (driver or passenger of
the vehicle) by transmitting a reservation request to the TPG operator. The TPG operator verifies the reservation
conditions and the availability of the relevant TPG, and proposes a reservation confirmation or declination message to
the requesting user, including all reservation details and conditions.
If the reservation is confirmed, a reservation code may be generated by the TPG operator and transmitted to the
requesting users. This reservation code may be used in TIS and TPG pairing step.
If the reservation is confirmed, the TPG operator changes the reserved TPG state from available to reserved, during the
time period in which the reservation is effective. In case of cancellation (e.g. user no show up on time, reservation
cancellation), the TPG operator puts the TPG back to available state for other users.
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4.4 TIS and TPG p
...