V_{rel_max}

maximum relative vehicle speed at which the system is capable of operating

maximum relative vehicle speed at which the system is capable of operating

MAC-48

48 bit MAC address

EUI-64

64-bit EUI

absolute charging error

difference between the measured charge (toll) value and the actual value as measured by a reference system where a positive error means that the measurement exceeds the actual value.

difference between the measured charge (toll) value and the actual value as measured by a reference system where a positive error means that the measurement exceeds the actual value.

abstract data type

data type of atomic nature

data type of atomic nature

acceleration

rate of change of velocity of an object with respect to time
NOTE 1 to entry: Acceleration is a physical vector quantity; both magnitude and direction are needed to define it.
The unit of the scalar absolute value (magnitude) of acceleration is measured in the international system of units
as metres per second squared (m/s2).

rate of change of velocity of an object with respect to time
NOTE 1 to entry: Acceleration is a physical vector quantity; both magnitude and direction are needed to define it.
The unit of the scalar absolute value (magnitude) of acceleration is measured in the international system of units
as metres per second squared (m/s2).

accepted charging error interval

interval of the relative charging error that the toll charger considers as acceptable, i.e. as correct charging

interval of the relative charging error that the toll charger considers as acceptable, i.e. as correct charging

access control PDU

PDU generated by the Security Subsystem for purposes of establishing the authorisation status of a peer ITS-S application process

PDU generated by the Security Subsystem for purposes of establishing the authorisation status of a peer ITS-S application process

access methods

procedures and protocols to provision and retrieve data

procedures and protocols to provision and retrieve data

action

function that an application process resident at the roadside equipment can invoke in order to make the onboard equipment execute a specific operation during the transaction

function that an application process resident at the roadside equipment can invoke in order to make the onboard equipment execute a specific operation during the transaction

action

single operator action which is part of a traffic management plan measure, which is normally an “OperatorAction”-implementation of specific messages on variable message signs, by information delivery via other dissemination channels, etc
NOTE 1 to entry: It may be preventive, curative or planned, e.g.: to deliver information to road users; to spread salt on a road in case of danger of black…

single operator action which is part of a traffic management plan measure, which is normally an “OperatorAction”-implementation of specific messages on variable message signs, by information delivery via other dissemination channels, etc
NOTE 1 to entry: It may be preventive, curative or planned, e.g.: to deliver information to road users; to spread salt on a road in case of danger of black ice; to clear a road section of obstacles.

V_add

additional speed considering the tolerance for the test (m/s)

address location (AL)

application category that deals with the task of expressing a real world position in terms of the data representation
NOTE: Address location is one of the six application categories supported by the API.

application category that deals with the task of expressing a real world position in terms of the data representation
NOTE: Address location is one of the six application categories supported by the API.

adjacent channel

refers to the use of a neighbouring DSRC channel by two or more emissions
NOTE: It is possible that a DSRC channel has either one or two adjacent channels.

refers to the use of a neighbouring DSRC channel by two or more emissions
NOTE: It is possible that a DSRC channel has either one or two adjacent channels.

Advisory Point

data model entity that provides information about an approaching condition on a road that may require some action by the driver of a vehicle

data model entity that provides information about an approaching condition on a road that may require some action by the driver of a vehicle

advisory speed

speed set by an authority which it considers appropriate to the road, traffic, or environmental conditions
being experienced

speed set by an authority which it considers appropriate to the road, traffic, or environmental conditions
being experienced

aggregate domain

data concept that defines a grouping of data elements and/or data frames

data concept that defines a grouping of data elements and/or data frames

aggregation

association where the target class is an aggregate; therefore the source class is a part
NOTE 1 to entry: This characteristic is expressed in UML with an attribute named “aggregation” on the target side Association End being set to “aggregate”

association where the target class is an aggregate; therefore the source class is a part
NOTE 1 to entry: This characteristic is expressed in UML with an attribute named “aggregation” on the target side Association End being set to “aggregate”

AF

alternative frequency (an RDS feature)

AFI

Alternative Frequency Information (an RDS-TMC feature)

θ

angle of curved road (AOC) (deg)

ATR

answer to reset

antenna bore sight direction

direction of maximum antenna gain

direction of maximum antenna gain

ACID

Application and Content Identifier

ADC

application data container

application data protocol

application interface

communication point where one part of a system communicates with another in order to service an application
NOTE 1 to entry: The communication point is typically but not necessarily wireless in the scenarios of ISO 26683.

communication point where one part of a system communicates with another in order to service an application
NOTE 1 to entry: The communication point is typically but not necessarily wireless in the scenarios of ISO 26683.

application layer (L7)

top layer of the OSI seven-layer model as defined in ISO/IEC 7498-4
NOTE: This layer defines the structure and format of the data packet content along with the rules and procedures for exchanging data packets.

top layer of the OSI seven-layer model as defined in ISO/IEC 7498-4
NOTE: This layer defines the structure and format of the data packet content along with the rules and procedures for exchanging data packets.

A_PDU

application layer protocol data unit

A_SDU

application layer service data unit