http:// vehicular networks: @ ucla

http://www.scalable-networks.com http://www.ismb.it/http://www.ismb.it/http://www.ismb.it/

Vehicular Networks: Vehicular Networks:

@ @ UCLAUCLA

http://www.scalable-networks.com/



http://www.vehicularlab.org/

2G. Pau NSF Mobility Workshop @ Rutgers, `07 http://www.vehicularlab.orghttp://www.vehicularlab.org

The Standard: DSRC / IEEE 802.11p

Car-Car communications at 5.9Ghz

Derived from 802.11a three types of channels:

Vehicle-Vehicle service, a Vehicle-Gateway service and a control broadcast channel .

Ad hoc mode; and infrastructure mode

802.11p: IEEE Task Group for Car-Car communications

Forward radar

Computing platform

Event data recorder (EDR)

Positioning system

Rear radar

Communication facility

Display


Trace Driven Mobility

Synthetic: Fine grain vehicular traces are generated by using a microscopic traffic simulator (i.e. CORSIM, TRANSIMS, etc)

Issues: Map details (Tiger Database, signals, buildings, etc) Activities (why cars move?) Amount of data (15 minutes = about 4GB)

Actual: Traces are collected from actual vehicle, and a model is inferred.

Issues: Type of mobility Generalization of the model


What is next?

A Synthetic Mobility Model that is REALISTIC!

A density based Mobility model Integrated with TIGER/Naviteq:

validated through Transims Real measurements in several Italian Cities (Torino, Monza, etc)

Made available from September 1st at http://www.vehicularlab.org/


http://www.scalable-networks.com http://www.ismb.it/http://www.ismb.it/http://www.ismb.it/

CC--VVee TTCampus - Vehicular TestbedCampus - Vehicular Testbed







Project Goals

Provide: A platform to support car-to-car experiments in various

traffic conditions and mobility patterns A shared virtualized environment to test new protocols

and applications Remote access to C-VeT through web interface

Allow: Collection of mobility traces and network statistics Experiments on a real vehicular network Full experimental Flexibility but no control on Mobility,

That is given.


Hardware

Cappucino PC

GPS and other hardware similar to current Few High precision GPS installed in the Testbed.


GPS HW RADIO MODEM 802.11 ADAPTER

API

GPS DRV

Ser

vice

s

AUTHORIZATION LAYER

LOCAL DB

VM 2 RM COMMUNICATION LAYER

App

. Lo

gic

VM 2 RM API VIRTUAL NETWORK ADAPTER

Virtual LAN

USER SPACE

Rea

l Mac

hine

Virtual Machine

MODEM DRV AdHoc IF Managed IF

Tran

sparen

t Access


Contributions:

Cvet- Testbed Provides: Full access to the Node (yes you can re-compile your kernel) Mobility (10 Cars - 20 Bus) THANKS MARIO Mobility Trace Collections Emulation environment that exactly replicate the test-bed

Mobility Models: MobiDense a Model that generates Synthetic traces very accourate. Availabe at http://www.vehicularlab.org/ starting Sept 1st.

WE NEED 4 USERS starting SEPT 7.


The C-VeT testbed

The End

Thank You


Example: Portland, Oregon

Some statistics: Cars: 16,000/3500 (tot/avg #) Area: downtown Portland (3 x 7km) Granularity 1sec Microscopic traffic simulation Data: US Bureau of Census Maps: Tiger/Portland Transportation Authority


Mobility Models: (Portland, Oregon)

Different Mobility Models on the same area.

Substantial differences in Connectivity!

QuickTime™ and aH.264 decompressor

are needed to see this picture.


Actual Traces

No real actual traces publically available yet!

Available Bus Aggregated Traces Campus pedestrian traces (Crawdad) Emergency Vehicle traces (available 2nd semester 07)

http:// vehicular networks: @ ucla

Documents

pau nsf mobility workshop

mobility patterns

kernel mobility

synthetic mobility model

model slide

collection of mobility

car car communications

ucla slide