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Glossary

Balise

A passive or active device normally mounted in proximity to the track for communications with passing trains. A standard for passive balises has been devised within the EUROBALISE project.

Broadcast Call

A call made to all members of a pre-defined group within a local geographical area. Only the initiator of the call may talk with all other group members listening only.

Base Station Controller (BSC)

Coordinates the actions of BTS. Manages the radio interface, by remote control of BTS; the main functional areas of the BSC are the radio network management, the BTS management, the interface with the transmission network, the handling of MS connections.

Base Transceiver Station (BTS)

Acts as the interface between MS’s and the network, by providing radio coverage functions from their antennas.

Cab Radio

The radio and associated user and other interfaces installed in the cab of a locomotive and for use principally by the locomotive driver. Definition also includes those radios supporting ATC.

Call Type

A prefix used to identify the User Number dialled.

Chief Conductor

A member of the train crew with overall responsibility for passenger related Railway activities on-board the train.

Coach Number

A number assigned to an item of rolling stock on a permanent basis. The coach number may form a component of a functional number used to address users/systems on an item of rolling stock.

Controller

An individual responsible for the conduct of some aspect of train operations (also known as dispatcher). For the purposes of this specification the following functional roles of controllers are defined: ? primary controller; ? secondary controller; ? traffic controller; ? power supply controller. Dependent upon local circumstances, a number of functional roles can be carried out by a single controller or a single functional role can be carried out by a number of controllers.

Direct Mode

The term for back-to-back or set-to-set radio communications without the use of any ground infrastructure.

Driver Safety Device

An on-train system which monitors the alertness of the driver and provides warning and alarms to other systems as appropriate.

EIRENE Network

An EIRENE network is a railway telecommunications network, based on the ETSI GSM standard, which complies with all related mandatory requirements specified in the EIRENE FRS FRS Functional Requirements Specifications and SRS. An EIRENE network may also include optional features and these shall then be implemented as specified in the EIRENE FRS and SRS. The EIRENE network excludes terminals.

EIRENE Network Access Number

A number dialled as an access code to allow use of functional numbers not compliant with the ITU-T Rec E.164.

EIRENE System

An EIRENE system is a railway telecommunications system based on the ETSI GSM standard, which complies with all related mandatory requirements as specified in the EIRENE FRS and SRS. An EIRENE system may also include optional features and these shall then be implemented as specified in the EIRENE FRS and SRS. The EIRENE System includes terminals.

Engine Number

A number assigned to an item of traction stock on a permanent basis. The engine number may form a component of a functional number used to address users/systems on an item of traction stock. Fiche

A UIC fiche or leaflet is a document adopted by UIC members. Statements within the fiche may comprise specifications which are binding on UIC members (‘obligatory’ specifications) or optional (‘recommended’ specifications). The existing track-to-train radio standard is contained within UIC fiche 751-3.

Functional Addressing/Numbering

A term used to describe the process of addressing a call using a number representing the function a user is performing, rather than a number identifying the user’s terminal equipment.

Functional Identity

The full alphanumeric description of the function performed by a called or calling party within the functional numbering scheme, identifying them by function or role rather than by a specific item of radio equipment or user subscription. The functional identity can include characters and/or numbers. Functional Number

The full number used within the functional addressing scheme to contact an end user/system by function or role rather than by a specific item of radio equipment or user subscription.

Group Call

A call made to all members of a pre-defined group within a local geographical area. Only one member of the group may talk at any instant with all other group members listening only.

Handover

The process by which connection between the GSM mobile and the GSM network is maintained as the mobile moves from area to area, by passing communication channel control from one base station to another or between different channels in one cell.

High Speed Line (HSL)

A section of route forming part of the European High Speed Rail Network and any additional routes specified as such by national administrations.

Home Location Register

HLR is a centralised network database that stores and manages all mobiles subscriptions belonging to a specific operator the information stored includes subscriber identity (IMSI, MSISDN), subscriber supplementary services, subscriber location information, subscriber authentication information.

Link Assurance Signal (LAS)

A form of unidirectional signalling transmitted periodically or constantly from one radio to another to allow the receiving user to detect a break in radio transmission during critical manoeuvres (eg during shunting).

Location Dependent Addressing (LDA)

A term used to describe the process of addressing a particular function (typically a controller) based on the current location of the user (typically a train).

Multi-Party Call

A voice communication method whereby a number of parties defined by the call initiator may participate in the call. All parties may talk simultaneously.

Multiple Driver Communications

A term used to describe communications between the drivers of each active cab in a train comprising multiple traction vehicles.

Operational Communications

These are railway communications directly concerned with train movements or train operation. For example controller-driver communications.

Power Supply Controller

A controller responsible for the management of the traction power supply.

Primary Controller

The location and direction of movement of any particular train permits the unique identification of a Primary Controller. The Primary Controller is currently the co-ordinator of train emergency calls. The Primary Controller is normally responsible for the operation of a designated area of track. The exact responsibilities of the Primary Controller are determined on a national basis. Radio Block Centre

An ERTMS ERTMS European Rail Transport Management System /ETCS ETCS European Train Control System term referring to a centralised safety unit to establish and control train separation using radio as the train to ground communication medium. Railway Access Code

A prefix used to identify an EIRENE network outside the network the calling party is operating in.

Railway Emergency Cal (REC)

A high priority call for informing drivers, controllers and other concerned personnel of a level of danger requiring all Railway movements in a pre-defined area to stop. Two types of Railway emergency calls are defined: ? Train emergency calls (for Railway emergencies whilst not involved in Shunting operations). ? Shunting emergency calls (for Railway emergencies whilst involved in Shunting operations). Roaming

The use of a mobile on any communications network other than the user’s home network. Routing database The database that contains the registered relationships between the functional number and the MSISDN. Secondary Controller

A Secondary Controller is a train controller who holds responsibility for the safe running of trains on a designated area of track (e.g. a signaller). Secondary Controllers require the facility to communicate with trains in all situations in order to perform their function. The split of responsibilities between Primary Controllers and Secondary Controllers is determined on a national basis. Shunting Emergency Call

A Railway emergency call used to instruct shunting teams to cease shunting movements immediately.

Shunting Team

A group of people manoeuvring trains in order to change their composition. Communications for shunting are particularly critical when a driver at the front of a train is pushing it backwards towards buffers or other potential obstructions. In this case a lookout is often required to report progress to the driver. Stock Number

A number assigned to an item of traction or rolling stock on a permanent basis. A stock number may form a component of a functional number used to address users/systems on an item of traction or rolling stock.

Traffic Controller

A controller who has responsibility for the scheduling of trains and the ‘flow’ of trains over the network. For example, traffic control personnel are responsible for such activities as holding connecting services and minimising disruption to the timetable. The traffic control function has no formal safety responsibility.

Train Controller

A controller who has responsibility for the safe movement of trains.

Train Number

A number given to a train by operational staff for a particular journey. A train number may form a component of functional number used to address users/systems on a train.

Tromboning

Tromboning may occur when a call is placed to a roaming mobile in the same country as the call originator. Tromboning is the term given to the routing of a call via the mobile’s home country and back. This is obviously undesirable.

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