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Table 1 List of abbreviations and symbols

From: A quantitative study of Cooperative Awareness Messages in production VANETs

Abbreviation/symbol

Meaning

A5, A6

Autobahn 5/6

B CAM

CAM size (bytes)

C

Transmission bandwidth of 802.11p

C2C, Car2Car

Car-to-car communication

CAM

Cooperative awareness message

d co

Crossover distance

d range comm

Communication range (radius)

DENM

Decentralized environmental notification message

d vehicle inter

Average distance between vehicles on a lane

d HS

Hidden station range (radius)

d

Distance between sender and receiver

γ

Nakagami signal attenuation parameter

Γ SNR

Signal-to-noise ratio

hsnd,hrcv

Antenna height of sender and receiver

l vehicle

Average length of vehicles

λ

Signal wavelength

LDM

Local dynamic map

μ

Path loss coefficient

n lanes

Number of overall parallel lanes of a road

n rcvd passing

Number of received CAMs from a single vehicle whilepassing

φ

Penetration rate of VANET technology

P [ d 1 , d 2 ]

Average message reception probability for distance interval [d1,d2]

P combined success

Overall CAM reception probability

P Nakagami success

Message reception probability for Nakagami model

P hidden loss

Message loss probability due to hidden stations

r rcvd CAM

Rate of received CAMs ( CAMs s )

r sent cr

Rate of sent CAMs within communication range of receiver

r rcvd cr

Rate of received CAMs within communication range ofreceiver

ρ

Relative channel load

σ CAM

CAM generation density per meter and second

σ vehicle

Vehicle density ( vehicles m )

SUMO

Simulator for Urban MObility

T air

Air-time of message on channel

T CA

Channel access time

T sent CAM

Inter-generation time of CAMs from a single sender

T d inter

Inter-reception time of CAMs from senders with distance d

T [ d 1 , d 2 ] inter

Inter-reception time of CAMs from senders with distance d1 to d2

T Off

Back-off time for CAM triggering

t pass

Communication time between vehicles passing in opposite direction

TraCI

Traffic control interface

VANET

Vehicular ad-hoc network

v

Average vehicle speed

V2V

Vehicle-to-vehicle communication