Abbreviations

Results for area 5.2 Communication parties

term
antenna
definition

roadside equipment that communicates with the roadside units such as signal controllers and the in-vehicle units using radio signals

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term
centre
definition

computer or network that is required to meet a standardized communications interface over a fixed-point communications network, regardless of whether it is the only system within the building or just one of many, or even if it is located in the field

term
destination
definition

system or device to which the information in the data packet is intended to be sent

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term
end-application
definition

process or program using the communications stack

term
vehicle identification based detector
definition

detector that detects vehicle identities based on wireless communication with tags or on-board units (OBU) in the vehicle, which transmits the vehicle's identity information to the traffic signal controller

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term
occupancy based detector
definition

detector that detects vehicles and traffic characteristics based on the state of the occupancy using methods such as loop or magnetic detectors

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term
image processing based detector
definition

detector that detects vehicles based on the real-time image data from the digital camera which has virtual sensing lines for estimating queue length or other parameters in approaching lanes

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term
client
definition

computer or application which requests and accepts data from a server computer or application using some kind of protocol

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term
roadside communication unit
definition

roadside equipment that communicates with the in-vehicle units and the roadside units, e.g. beacons and antennas

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roadside modules
definition

terminal units controlled or monitored by a traffic management centre

NOTE Roadside modules are usually installed at the roadside arena.

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term
port
definition

logical channel in a communications system

NOTE UDP and TCP use port numbers to multiplex data packets from a variety of applications onto a single communications system.

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term
beacon
definition

roadside equipment that communicates with the roadside units such as the signal controllers and the in-vehicle units

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term
server
definition

computer or application which receives and responds to requests for data from client computers or applications using some kind of protocol

term
signal controller
definition

roadside equipment that controls the lighting timings of traffic lights

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term
vehicle ID
definition

identification number used for the identification of emergency and/or public transport vehicles

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term
invehicle unit
definition

the invehicle equipment that transmits/receives information to/from the Roadside Communication Units and, in some cases, outputs information on its screen, etc.

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term
sender
definition

system which created and sent the DATEX-ASN data packet

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term
origin
definition

system or device which was the source for all of the information in the data packet

NOTE In many cases, this will be the same as the sender, but could be different. For example, a bridge (or proxy agent) may translate between protocols; in this case the bridge (or proxy agent) would be the sender, while the system generating the data would be the origin.

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term
detection zone
definition

area on the road surface where the target or the group of targets actuates the detector

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term
traffic management center (TMC)
definition

the central system that controls the functions of traffic data collection, signal control, and information service based on collected data, etc.

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