Vanets Simulations

8/17/2019 Vanets Simulations

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Presentation Overview

History and background

Why is VANET special?

Vehicular networking vs. ITS

What is required for simulation?

Existing approaches Simulation packages

Veins (OMNeT++ & SUMO)

SUMO demo

OMNeT++ demo

Veins demo

Remaining challenges

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History and Background

Traditional traffic simulations: Civil worked with vehicular traffic

Road design

Intersection

E&E worked with network traffic

Computer networks

Mobile networks

Recent developments: Vehicular Ad-hoc NETworks (VANET)

Intelligent Transportation Systems (ITS)

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4

O B

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R S

U

V 2

I

V 2

V

W i - F i

C A N

I S

P

I T

S

M

M

M

O S T

W

I M A X

W

A V E

C o n t r o l l e r A r e a

N e t w o r k

I n t e r n e t S e r v i c e

P r o v i s i o n

I n t e l l i g e n t T r a n s p o r t a t i o n S y s t e m s

M O S T M a s t e r

M e d i a O r i e n t e d

S y s t e m s T r a n s p o r t

W o r l d w i d e I n t e r o p e r a b i l i t y f o r M i c r o w a

v e A c c e s s

W i r e l e s s A c c e s s i n V e h i c u l a r E n v i r o n m e n t s

O n B o a r d U n i t

R o a d S i d e U n i t ( W

A V E )

V e h i c l e t o I n f r a s t r u c t u r e

V e h i c l e t o v e h i c l e

W i r e l e s s F i d e l i t y

RSU

OBU

Internet

I n

t r a - c a r

I n t e r - c a

r

V 2 V

E x t r a - c a r

V 2 I

MM

N e

t w o r k s

S e r v e r

s a n d

C o n s u

m e r s

ITS network

WIMAX

Wi-Fi

Cellular

WAVE

MOST

ring

CAN bus

WAVE

Servers and

databases

Operators and end users

Navigation Emergencydetectors

Audio-visualsources

Displays

Safety and

traffic management

Entertainment and

Internet connectivity


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Vehicular simulation: challenges, what’s different?

V2I and V2V Mobility patterns

Fast

Unpredictable, but constrained.

Broad range of applications Safety critical

Infotainment

Power usage

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What is required for simulation?

VANET: Accurate simulation of communications

signal propagation

networking

Accurate simulation of vehicle mobility Comms simulation use mobility info

ITS: Same as VANET

More applications support

Comms simulation (application) affects mobility

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Some approaches

Mobility Fixed number of vehicles at constant speed in straight

line in the same direction

Proprietary simulators (simple following, no overtaking)

Generate traces with a proper simulator, save to file

Limited scenarios and densities

Highway

Urban

Communications Fixed range, if within range communications successful.

Taking into account radio properties

Interference

Obstacles 7


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VANET simulation packages

Tool Advantages Disadvantages

Trafic and Network Simulator

(TraNs) (SUMO and ns-2).

Flexibility and real world maps.

Integrated solution.

No feedback is provided

from ns-2 to SUMO.

Development suspended

recently.

National Chiao Tung

University network simulator(NCTUns) is a proprietary

mobility and communications

simulator.

Single application with integrated

GUI. Popular for VANETresearch.

NCTUns is UNIX-based

and only runs on Fedora.Limited support.

VanetMobiSim with ns-2. Flexible mobility models with

micro-mobility and macro-mobility

models. Maps can be imported

from TIGER database.

No feedback is provided

from ns-2 to

VanetMobiSim.

Separate simulators.

Vehicles in Network

Simulation

(Veins), which integrates

SUMO and OMNeT++

Flexibility and real world maps.

Active community with support.

Full IEEE 802.11p

implementation. Integrated

solution.

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Veins (SUMO & OMNeT) Simulation model

Veins : veins.car2x.org/ (easy installation here)

OMNeT++ : www.omnetpp.org/ (easy thorough tutorial here)

MiXiM : mixim.sourceforge.net/

SUMO : sumo.sourceforge.net/

OpenStreetMap : www.openstreetmap.org/ 9

OM NeT++

M i X i M

Metrics

VeinsSUMO O p e

n S t r e e t M a p

H i g

h w a y m a p

U

r b a n m a p

Highway routesUrban routes

PHY layer

TraCI Mobility

HD traffic flows

LD traffic flows

MAC layer

Application

http://veins.car2x.org/http://goo.gl/NeACShttp://www.omnetpp.org/http://goo.gl/FuCJ8http://mixim.sourceforge.net/http://sumo.sourceforge.net/http://www.openstreetmap.org/http://mixim.sourceforge.net/http://mixim.sourceforge.net/http://www.openstreetmap.org/http://sumo.sourceforge.net/http://sumo.sourceforge.net/http://www.openstreetmap.org/http://sumo.sourceforge.net/http://mixim.sourceforge.net/http://goo.gl/FuCJ8http://www.omnetpp.org/http://goo.gl/NeACShttp://veins.car2x.org/


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SUMO Setup: Map: www.OpenStreetMap.org

Export map from web site, and convert to XML with SUMO’s netconvert netconvert --osm rc.osm

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rc.osm

net.net.xml

Road sections are called edges


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SUMO setup: trips

Generate random trips (from A to B) from the road network (net.net.xml)

randomTrips.py -n net.net.xml -l -e 600 -o trips.trips.xml

Convert the trips to routes (what is between A and B) and traffic flow

duarouter -n net.net.xml –t trips.trips.xml -o routes.rou.xml

--ignore-errors 11

trips.trips.xml

routes.routes.xml


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SUMO setup: simulation

Can also specify flows (in stead of single vehicles), vehicle types, different

following models, etc.

Configure the simulation by specifying the network, the routes, and theduration in a config file.

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sumo.sumo.cfg


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SUMO simulation

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OMNeT++ setup

Connections between layers are done using “gates”. C++ files specify the behaviour of the modules

The NED files specify how gates are connected.

In the .ini file specifies parameters Transmitter power, receiver sensitivity, thermal noise, slot durations, etc.

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C++ module file: TraCIDemo.cc (application)

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NED files (there are many)

In TraCIDemo.NED (application layer)

In Car.NED:

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Initialization file

In config.ini:

For each node, you can also specify location and speed, managedby the mobility module.

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OMNeT++ simple mobility demo

BaseNetwork example that ships with MiXiM installation, just run the

config.ini file (right click, run as OMNeT simulation)

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Veins setup

Veins connects SUMO and OMNeT++

Veins uses a TCP connection and Python scripts to enableSUMO to act as a mobility model in OMNeT++

Python set up to wait for Veins (module in OMNeT++)

sumo-launchd.py -p 9999 -vv -c /c/user/src/sumo/bin/sumo.exe

And OMNeT is configured to look for mobility module

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Veins (OMNeT++ & SUMO) demo

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Demo that ships with Veins installation, just run the config.ini file

(Traci launch demo) (right click, run as OMNeT simulation) Only thing replaced are the SUMO net.net.xml and routes.rou.xml

files.


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Remaining challenges

Data dissemination

Signal propagation with obstacles

Multichannel management in IEEE 802.11p

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http://www.sun.ac.za/


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Questions or comments?
http://www.sun.ac.za/http://www.sun.ac.za/http://www.sun.ac.za/

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Vanets Simulations