FprCEN/TS 13149-8
(Main)Public transport - Road vehicle scheduling and control systems - Part 8: Physical layer for IP communication
Public transport - Road vehicle scheduling and control systems - Part 8: Physical layer for IP communication
This part 8 specifies the physical layer of an onboard data transmission bus between the different equipment for service operations and monitoring of the fleet. This applies to equipment installed on board vehicles that are operating as part of a public transport network, i.e. in operation under public service contracts. This equipment includes operation aid systems, automatic passenger information systems, fare collection systems, etc.
The use of IEEE 802.11 Wireless LAN communications is excluded from the scope of this Technical Specification; its use is not recommended for the service-based approach of CEN/TS 13149.
Equipment directly related to the safety-related functioning of the vehicle (propulsion management, brake systems, door opening systems, etc.) are excluded from the scope of this Technical Specification and are dealt with in other standardization bodies. Interfaces to such equipment or safety-critical networks can be provided through dedicated gateways.
This document covers the following:
- The link between equipment inside vehicles consisting of one carriage only, e.g. buses and trolleybuses, as well as a set of carriages, e.g. trams and trains;
- The Physical Layer for IP-communication networks onboard PT vehicles;
- The cables, connectors and other equipment including pin assignment and environmental requirements.
This document specifies wired communication networks onboard PT vehicles which are based on the Ethernet specification ISO/IEC/IEEE 8802-3-10 Base T, 100 Base Tx and 1000 Base T.
Öffentlicher Verkehr - Planungs- und Steuerungssysteme für Straßenfahrzeuge - Teil 8: Physikalische Schicht für IP-Kommunikation
Transport public - Systèmes de planification et de contrôle des véhicules routiers - Partie 8: Couche physique pour communication IP
Javni prevoz - Sistemi za časovno razporejanje in nadzor cestnih vozil - 8. del: Fizična plast za IP-komunikacije
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2025
Javni prevoz - Sistemi za časovno razporejanje in nadzor cestnih vozil - 8. del:
Fizična plast za IP-komunikacije
Public transport - Road vehicle scheduling and control systems - Part 8: Physical layer
for IP communication
Öffentlicher Verkehr - Planungs- und Steuerungssysteme für Straßenfahrzeuge - Teil 8:
Physikalische Schicht für IP-Kommunikation
Transport public - Systèmes de planification et de contrôle des véhicules routiers - Partie
8: Couche physique pour communication IP
Ta slovenski standard je istoveten z: FprCEN/TS 13149-8
ICS:
03.220.20 Cestni transport Road transport
35.100.10 Fizični sloj Physical layer
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.
FINAL DRAFT
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
January 2025
ICS 35.240.60; 43.040.15 Will supersede CEN/TS 13149-8:2013
English Version
Public transport - Road vehicle scheduling and control
systems - Part 8: Physical layer for IP communication
Transport public - Systèmes de planification et de Öffentlicher Verkehr - Planungs- und
contrôle des véhicules routiers - Partie 8: Couche Steuerungssysteme für Straßenfahrzeuge - Teil 8:
physique pour communication IP Physikalische Schicht für IP-Kommunikation
This draft Technical Specification is submitted to CEN members for Vote. It has been drawn up by the Technical Committee
CEN/TC 278.
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, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a Technical Specification. It is distributed for review and comments. It is subject to change
without notice and shall not be referred to as a Technical Specification.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprCEN/TS 13149-8:2025 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 Symbols and abbreviations . 7
5 Requirements . 7
5.1 General remarks . 7
5.2 Network bandwidth . 8
5.3 Network structure . 8
5.4 Cabling . 8
5.5 Connectors . 9
5.6 Switches . 13
5.7 Power over Ethernet . 14
5.8 Shielding and grounding . 17
5.9 Additional test requirements . 17
Annex A (informative) European Bus System of the Future reference . 18
A.1 Solution References . 18
Bibliography . 19
FprCEN TS 13149-8:2025 (E)
European foreword
This document (FprCEN/TS 13149-8:2025) has been prepared by Technical Committee CEN/TC 278
“Intelligent Transport Systems”, the secretariat of which is held by NEN.
This document is currently submitted to the Vote on TS.
This document will supersede CEN TS 13149-8 2013.
CEN/TS 13149-8:2013:
— support for 1000 Base T connections (Gigabit Ethernet);
— description of power over ethernet mode B;
— Use of M12 Connector X;
— Adaptors between devices and vehicle network presented as M12 connectors.
Introduction
This document is Part 8 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 different suppliers and may need to be integrated. For
instance:
— a ticket machine may need location information to update fare stages;
— next-stop and destination information may be drawn from schedule information held in the ticket
machine;
— vehicle location systems may be used to drive signal priority requests.
As data exchange between functional units becomes more widespread, a networked approach begins to
become efficient. With standardized underlying technology, the PT vehicle begins to look like a local
area network: making use of IEEE 802 communications and the Internet Protocol (IP) suite.
Without a clear technology framework, integrating these systems would require complex technical
discussions every time a device is procured. The existing EN 13149 standards recognized this long ago
in respect of the core vehicle systems, but these have not been adapted to IP networking.
Six historical parts of EN 13149, namely Parts 1 to 6, have now been withdrawn in favour of the new IP-
based approach. The core of this new approach was specified in two Technical Specifications (TS):
— CEN/TS 13149-7 specifies the Network and System Architecture for on board equipment. It
describes basic principles of communications including a general description of the network
topology, addresses schematics, basic network services, a system overview and basic module
architecture.
— CEN/TS 13149-8 specifies the Physical Layer for IP-communication networks on board PT vehicles.
This part specifies the cables, connectors and other equipment including pin assignment and
environmental requirements.
Building on this, a series of specific services have been detailed:
— CEN/TS 13149-9, specifying the structure to be used by a service providing time data to the on-bus
network and the Profiles of basic and generic Services and Devices as well as profiles of specific
services and devices;
— CEN/TS 13149-10, specifying the structure to be used by a service providing location data to the on-
bus network, specifically relating to Global Navigational Satellite Systems (GNSS);
— CEN/TS 13149-11, specifying the structure to be used by a service providing data from the vehicle
platform to the on-bus network, using the Fleet Management System (FMS) for source data.
FprCEN TS 13149-8:2025 (E)
These documents draw on large scale trials undertaken within European projects such as EBSF (the
“European Bus System of the Future” project) and its successors, together with technical developments
which have since been adopted by programmes such as the German IBIS-IP platform [1] and, more
recently, the European platform ITxPT [2]. This has ensured not only that the CEN specifications are
robustly proved in practice, but also that they have the support of many key system developers and
operators.
With these Technical Specifications, it will be easier to achieve:
— more efficient development of PT components;
— lower cost, lower risks and a smoother on board integration of PT equipment;
— more efficient operation and maintenance of on board PT equipment;
— high quality intermodal passenger services based on intermodal PT information;
— integration of new PT services.
As an IP based solution, this document draws on a range of IETF Requests for Comment (RFCs), not all
of which may be formal standards. A list of those cited is presented in the Bibliography.
1 Scope
This part 8 specifies the physical layer of an onboard data transmission bus between the different
equipment for service operations and monitoring of the fleet. This applies to equipment installed on
board vehicles that are operating as part of a public transport network, i.e. in operation under public
service contracts. This equipment includes operation aid systems, automatic passenger information
systems, fare collection systems, etc.
The use of IEEE 802.11 Wireless LAN communications is excluded from the scope of this Technical
Specification; its use is not recommended for the service-based approach of CEN/TS 13149.
Equipment directly related to the safety-related functioning of the vehicle (propulsion management,
brake systems, door opening systems, etc.) are excluded from the scope of this Technical Specification
and are dealt with in other standardization bodies. Interfaces to such equipment or safety-critical
networks can be provided through dedicated gateways.
This document covers the following:
— The link between equipment inside vehicles consisting of one carriage only, e.g. buses and
trolleybuses, as well as a set of carriages, e.g. trams and trains;
— The Physical Layer for IP-communication networks onboard PT vehicles;
— The cables, connectors and other equipment including pin assignment and environmental
requirements.
This document specifies wired communication networks onboard PT vehicles which are based on the
Ethernet specification ISO/IEC/IEEE 8802-3-10 Base T, 100 Base Tx and 1000 Base T.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO/IEC/IEEE 8802-3:2021, Telecommunications and exchange between information technology systems
— Requirements for local and metropolitan area networks — Standard for Ethernet — Part 3
EN 50328, Railway applications — Fixed installations — Electronic power converters for substations
EN 50155, Railway applications — Rolling stock — Electronic equipment
IEC 61156-6, Multi core and symmetrical pair/quad cables for digital communications — Part 6:
Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz — Work area wiring —
Sectional specification
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
FprCEN TS 13149-8:2025 (E)
3.1
consist
set of cars able to run in service, smallest entity in service
3.2
PT vehicle
smallest entity of a rolling stock
Note 1 to entry: For example: bus, trolley bus, tramway.
4 Symbols and abbreviations
DC - DC- in PoE
DC + DC+ in PoE
ED End Device
EMC Electro Magnetic Capab
...
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