SIST-TS CEN/TS 13149-9:2020
(Main)Public transport - Road vehicle scheduling and control systems - Part 9: Time service
Public transport - Road vehicle scheduling and control systems - Part 9: Time service
The CEN 13149 series of products concerns on-board data communication systems on public transport vehicles. This series provides for data services that enable open and managed sharing of relevant information.
This document, being Part 9 of the series, specifies a time publication, enabling all on-vehicle services to share a common understanding of current time, based on a suitable agreed master network clock. It covers:
- the functional scope, i.e. which data the service provides, why, when and how often.
- the transport protocol, i.e. how the data are transmitted.
- the service publication, i.e. how the service can be found by other modules or applications
- the structure of the data, i.e. how the data are structured and how the data elements are named.
This document implements the service framework described in CEN/TS 13149-7.
Öffentlicher Verkehr - Planungs- und Steuerungssysteme für Straßenfahrzeuge - Teil 9: Zeitdienst
Transport public - Systèmes de planification et de contrôle des véhicules routiers - Partie 9 : Service horaires
Javni prevoz - Sistemi za časovno razporejanje in nadzor cestnih vozil - 9. del: Časovna storitev
General Information
Overview
SIST-TS CEN/TS 13149-9:2020 is a technical specification developed by the European Committee for Standardization (CEN) that defines the Time Service within on-board data communication systems for public transport road vehicles. As Part 9 of the broader CEN 13149 series, this standard addresses the critical need for a harmonized, accurate, and synchronized time reference accessible by all vehicle subsystems. The specification supports seamless integration of various public transport components by ensuring a common understanding of current time based on a master network clock using the Simple Network Time Protocol (SNTP).
This standard builds on the system and network architecture described in CEN/TS 13149-7 and aims to enhance interoperability, system efficiency, and operational consistency in modern public transport environments.
Key Topics
Functional Scope
CEN/TS 13149-9 outlines which time data the service provides, the reasons for its use, the timing of its updates, and specific use cases such as synchronizing ticketing, passenger information, and vehicle control systems.Transport Protocol
The Time Service uses the UDP transport protocol with SNTP for efficient and accurate time synchronization between the master time server module and other on-vehicle components.Service Publication
The specification defines how the Time Service is registered and discovered on a network via a service name ("TimeService"), SRV DNS records, and accompanying TXT records. This enables automatic discovery and connection by other modules or applications on the vehicle network.Data Structure
Time data does not involve complex XML structures but relies on SNTP services implemented within the vehicle network. The standard dictates clear naming conventions and record attributes to ensure consistency.Update Rate
The specification requires that time updates occur at a frequency that satisfies the needs of all consuming applications on-board, maintaining accurate synchronization across the vehicle systems.
Applications
Public Transport Vehicle Integration
Enabling diverse on-board systems such as ticket machines, destination displays, and Automated Vehicle Location (AVL) to synchronize their operations with a unified time reference.Networked On-Board Systems
Facilitates IP-based local area networks within vehicles, supporting efficient communication and data sharing between modules using standardized time signaling.Improved Operational Efficiency
Accurate and shared time references aid in schedule adherence, real-time passenger information updates, and integration with external infrastructure like traffic signal priority systems.System Interoperability and Maintenance
Simplifies integration of components from multiple suppliers by providing a clear and common time service framework that reduces technical complexity and maintenance costs.
Related Standards
CEN/TS 13149-7: System and Network Architecture – Defines the overall communication architecture on public transport vehicles and provides the framework for services like the Time Service.
CEN/TS 13149-8: Physical Layer for IP Communication – Specifies the physical network components that support data transmission within vehicle networks.
CEN/TS 13149-10: Location Service (in voting stage) – Complements the Time Service by standardizing positioning and Global Navigation Satellite Systems (GNSS) data communication.
CEN/TS 13149-11: Vehicle Platform Interface Service (in voting stage) – Specifies how vehicle platform data is integrated into the on-board network.
RFC 4330: Simple Network Time Protocol (SNTP) – Provides the basis protocol used for time synchronization in this service.
By implementing SIST-TS CEN/TS 13149-9:2020, public transport operators and system manufacturers can ensure a reliable, standardized time synchronization service is embedded into vehicle communication systems, enabling smoother operations, better system integration, and higher quality passenger experiences. This standard is key for advancing intelligent transport systems and enhancing the interoperability of next-generation public transport infrastructure.
Frequently Asked Questions
SIST-TS CEN/TS 13149-9:2020 is a technical specification published by the Slovenian Institute for Standardization (SIST). Its full title is "Public transport - Road vehicle scheduling and control systems - Part 9: Time service". This standard covers: The CEN 13149 series of products concerns on-board data communication systems on public transport vehicles. This series provides for data services that enable open and managed sharing of relevant information. This document, being Part 9 of the series, specifies a time publication, enabling all on-vehicle services to share a common understanding of current time, based on a suitable agreed master network clock. It covers: - the functional scope, i.e. which data the service provides, why, when and how often. - the transport protocol, i.e. how the data are transmitted. - the service publication, i.e. how the service can be found by other modules or applications - the structure of the data, i.e. how the data are structured and how the data elements are named. This document implements the service framework described in CEN/TS 13149-7.
The CEN 13149 series of products concerns on-board data communication systems on public transport vehicles. This series provides for data services that enable open and managed sharing of relevant information. This document, being Part 9 of the series, specifies a time publication, enabling all on-vehicle services to share a common understanding of current time, based on a suitable agreed master network clock. It covers: - the functional scope, i.e. which data the service provides, why, when and how often. - the transport protocol, i.e. how the data are transmitted. - the service publication, i.e. how the service can be found by other modules or applications - the structure of the data, i.e. how the data are structured and how the data elements are named. This document implements the service framework described in CEN/TS 13149-7.
SIST-TS CEN/TS 13149-9:2020 is classified under the following ICS (International Classification for Standards) categories: 03.220.20 - Road transport; 35.240.60 - IT applications in transport; 43.040.15 - Car informatics. On board computer systems. The ICS classification helps identify the subject area and facilitates finding related standards.
You can purchase SIST-TS CEN/TS 13149-9:2020 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2020
Javni prevoz - Sistemi za časovno razporejanje in nadzor cestnih vozil - 9. del:
Časovna storitev
Public transport - Road vehicle scheduling and control systems - Part 9: Time service
Öffentlicher Verkehr - Planungs- und Steuerungssysteme für Straßenfahrzeuge - Teil 9:
Zeitdienst
Transport public - Systèmes de planification et de contrôle des véhicules routiers - Partie
9 : Service horaires
Ta slovenski standard je istoveten z: CEN/TS 13149-9:2020
ICS:
03.220.20 Cestni transport Road transport
35.240.60 Uporabniške rešitve IT v IT applications in transport
prometu
43.040.15 Avtomobilska informatika. Car informatics. On board
Vgrajeni računalniški sistemi computer systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CEN/TS 13149-9
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
May 2020
TECHNISCHE SPEZIFIKATION
ICS 35.240.60; 43.040.15
English Version
Public transport - Road vehicle scheduling and control
systems - Part 9: Time service
Transport public - Systèmes de planification et de Öffentlicher Verkehr - Planungs- und
contrôle des véhicules routiers - Partie 9 : Service Steuerungssysteme für Straßenfahrzeuge - Teil 9:
horaires Zeitdienst
This Technical Specification (CEN/TS) was approved by CEN on 8 December 2019 for provisional application.
The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.
CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 13149-9:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Time Service . 6
4.1 Functional Scope / Description & Use-Cases . 6
4.2 Architecture & Transport Protocol . 6
4.3 Service Publication . 7
4.3.1 Published Service Name . 7
4.3.2 SRV Record . 7
4.3.3 TXT record . 7
4.4 Structure of the service . 8
4.4.1 Overview of operations . 8
4.4.2 Detailed Description of data structures . 8
4.5 Update rate . 8
Bibliography . 9
European foreword
This document (CEN/TS 13149-9:2020) has been prepared by Technical Committee CEN/TC 278
“Intelligent transport systems”, the secretariat of which is held by NEN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document is Part 9 of a series of European Standards and Technical Specifications that includes:
— CEN/TS 13149-7, Public transport – Road vehicle scheduling and control systems – Part 7: System
and network architecture;
— CEN/TS 13149-8, Public transport – Road vehicle scheduling and control systems – Part 8: Physical
layer for IP communication;
— CEN/TS 13149-9, Public transport – Road vehicle scheduling and control systems – Part 9: Time
service [this document];
— CEN/TS 13149-10, Public transport – Road vehicle scheduling and control systems – Part 10:
Location service [currently at voting stage];
— CEN/TS 13149-11, Public transport – Road vehicle scheduling and control systems – Part 11: Vehicle
platform interface service [currently at voting stage].
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Introduction
This Technical Specification is Part 9 of a series of European Standards and Technical Specifications.
The scope of this series is on-board data communication systems on public transport vehicles.
Public Transport (PT) vehicles have an increasing array of information and communications systems,
including ticket machines, Automated Vehicle Location (AVL) systems, destination displays, passenger
announcement systems, vehicle monitoring systems, etc. Other systems are beginning to be included
such as advertising screens, tourist guides, WiFi “hotspots” and infotainment.
In addition, equipped PT vehicle will usually have a communications facility to enable voice and data to
be exchanged with the control centre, other PT vehicles, PT infrastructure and roadside devices for
instance in requesting priority at traffic signals. Many types of communication channel are used
including public and private wireless communication networks.
These systems may be provided by a number of diffe
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