RUBeNS Rural

1
RUBeNSRural UrBan e-TravellingNetwork
Simulator

• Sándor Kardos, Péter Laborczi, Attila Török,
  Lóránt Vajda
• Bay Zoltán Foundation for Applied Research,
  H-1116 Budapest, Fehérvári út 130., Hungary
• E-mail kardos, laborczi, torok, vajda_at_ikti.hu

Vehicular ad hoc networks
Our work

• Implementation of a generic simulation
  environment
• Multi-purpose (protocol design validation)
• Used components
• NS-2 (Linux)
• VISSIM (Windows)

Applications

• Road safety information
• Warning messages (sloppy road)
• Pile-up avoidance
• Cooperative driving
• to ease, secure the crossing of road
  intersections
• Adaptive Cruise Control ACC
• Platooning
• a string of cars closely following each other
• their speed should be synchronized (tempomat)
• Road Traffic Information
• Traffic jams, Travel times, Traffic control

Simulation Components
Problem Formulation

• Inter-vehicular wireless ad hoc networks will be
  wide spread in the future
• Today appropriate tools are required for protocol
  design and analysis

State of the Art
We have defined generic interfaces in cooperation
with German collegaues for simulator
interconnection and C in order to achieve
relatively easy adaptation to other possible
simulators.
They all either use too simple modelling or are
proprietary

• BMW Research and Technology (2005)
• CARISMA NS-2
• Traffic jam warning messages
• Michigan State University (2005)
• OwnSim NS-2
• 3 car pile-up avoidance scenario
• Volkswagen AG (2005)
• VISSIM NS-2
• Emergency warning messages

Simulator Architecture
Controls VISSIM. Translates commands and
parameters received from the TCP/IP Socket module
and translates to VISSIM and vice versa Start,
Stop, RunTill, GetVehicleAttribute, SetVehicleA
ttribute, GetAllVehicleAttribute Tools Visual
C, VISSIM COM interface
We decided to implement our own interconnection
of a road traffic simulator and a
telecommunications simulator (NS-2)
Creates commands for VISSIM according to the
defined command set and sends to the TCP/IP
Socket Module the module also translates the
response for NS-2.
Road Traffic Simulators examined
MITSSIMLab

• Open source traffic simulator with a wide range
  of traffic management system designs models the
  response of drivers to real-time traffic
  information and controls
• Managed to compile from the source under linux
  (old gcc 2.96 only)
• Only user documentation, no support

SUMO (Simulation of Urban MObility)

• GPL mobility simulator with microscopic car
  movement model, space-continuous and
  time-discrete car-following model
• Managed to compile version 0.9.2 from the source
  under Linux
• Sparse documentation
• primitive motion and road modelling

PHYMAC Module Apply an 802.11b protocol module
under NS-2. The module is able to modify/query
the node positions.
Application Communication Protocol Module
Implementation of the control application and a
simple flooding protocol for the demo
application. A simple flooding protocol transmits
this information to other affected cars, which
react on this information.
Text-based comminucation protocol based on Boost
and DataReel libraries
VISSIM

• Commercial microscopic, time step and behavior
  based simulation model developed to model urban
  traffic and public transit operations (Wiedemann
  Approach)
• Models different driving modes (free driving,
  approaching, following), braking, lane changes
• Provides good documentation of COM interface and
  has support

Future work

• Exact Definition of applications / scenarios
• More advanced group communication
• Challenges
• Multi-hop communication
• Reducing network traffic
• Digital Map Handling