Abbreviations

Results for area 8 Dedicated Short Range Communications

term
bit error rate (BER)
definition

averaged number of erroneous bits relative to the total number of transmitted bits

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term
time
definition

number of seconds passed since 1st January 1970, 00:00 (UTC)

NOTE This format is also known as ”UNIX time”.

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term
single-T-APDU fragment
definition

T-APDU that contains a complete PDU

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term
T-APDU fragment
definition

fragment header followed by part or all of the encoding of a value of the ASN.1 type T-APDUs

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term
fragmentation
definition

function performed by the transfer kernel to map one ASDU on multiple LSDUs

NOTE1 In ISO/IEC 7498-1, fragmentation is called segmentation.

NOTE2 The inverse function is called defragmentation or, in ISO/IEC 7498-1, disassembling.

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term
attribute identifier
definition

unambiguously distinguishes an attribute from all other attributes within the same element

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term
element identifier (EID)
definition

unambiguously distinguishes an element from all other elements residing in the same OBU

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term
link identifier
definition

unique address used for addressing the mobile equipment

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term
communication initialization
definition

procedure used to establish communication between an RSU and a newly arrived OBU

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term
channel
definition

for DSRC, a channel is indicated by reference to the downlink centre frequency of one up to four frequency bands with 5 MHz width each

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term
management
definition

provides and distributes values for the communication parameters for controlling the DSRC Communication stack

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term
transmitter spectrum mask
definition

maximum power (density) emitted by the RSU transmitter as function of the frequency

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term
interlayer management
definition

assembly of communication parameters of all protocol layers such that a consistent communication protocol is provided

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term
mobile equipment
definition

mobile communication facility capable of receiving information from the fixed equipment on the downlink and, optionally, also capable of transmitting information to the fixed equipment on the uplink

NOTE The mobile equipment normally corresponds to the vehicle’s communication unit.

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term
modulation
definition

keying of the carrier wave by coded data

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term
multiplexing
definition

function within the Transfer Kernel allowing simultaneous support for more that one Application in a single OBU

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term
carrier frequencies
definition

number and values of the downlink carrier frequencies, which are equal to the frequencies of the continuous wave CW, transmitted by the RSU and used by transponder OBUs for uplink communication; each carrier frequency is the centre frequency of a downlink channel

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term
window
definition

period of time during which the physical medium is allocated either to the fixed equipment or to the mobile equipment

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term
operation
definition

abstract representation of behaviour invoked in an entity

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term
downlink parameters
definition

downlink parameters apply to transmission of data from RSU to OBU

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term
uplink parameters
definition

parameters apply to transmission of data from OBU to RSU

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term
fixed equipment (FE)
definition

fixed communication facility with one or more downlink channels and, optionally, one or more uplink channels

NOTE Normally the fixed equipment is installed at a fixed location, but it may be installed on a mobile platform.

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term
head of the line
definition

queuing discipline (also referred to as strict or fixed priority queuing), where a number of queues are served in priority order; a lower priority queue is served if all higher priority queues are empty, each queue is served in First-Come-First-Serve order, each user goes head of the line of the users of lower priorities but behind all users of equal or higher priority

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term
polarisation
definition

polarisation of the electrical field strength (horizontal, vertical, left or right hand circular)

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term
profile
definition

unique set of parameter values controlling the behaviour of the DSRC

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term
DSRC profiles
definition

consistent and standardised set of cross layer parameters in a specific DSRC implementation identified by a unique number

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term
bit rate
definition

number of bits per second, independent of the data coding

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term
service access point (SAP)
definition

interface point between data link layer and application layer that has a unique Link Identifier and that allows layers to communicate

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term
range of transmission wavelength
definition

the lower and upper optical wavelength describe the optical bandwidth of an IR radiátor; both the lower and upper optical wavelength of an IR radiator are defined by the reduction of the peak intensity by 3dB, taking into account the effects of temperature and component deviations

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term
co-channel
definition

refers to the use of a neighbouring DSRC channel by two or more emissions

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term
concatenation
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term
antenna bore sight direction
definition

direction of maximum antenna gain

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term
broadcast pool
definition

data structure broadcast from the RSU to the OBUs

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term
uplink communication
definition

communication from the OBU to the RSU

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term
chaining
definition

function performed by the Transfer Kernel to link the execution of service primitives together

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term
vehicle service table (VST)
definition

data structure transmitted by the OBU to indicate available services

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term
event
definition

an instantaneous activity occurring spontaneously

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term
termination
definition

the procedure used to terminate communication between a RSU and an OBU

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term
adjacent channel
definition

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.

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term
layer 1 of DSRC (L1)
definition
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term
layer 2 of DSRC (L2)
definition
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