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Simulator integration: Vissim (Environment simulator) + NS2 (Telecom simulator) = RuBeNS Rural & UrBan e-Travelling PowerPoint Presentation
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Simulator integration: Vissim (Environment simulator) + NS2 (Telecom simulator) = RuBeNS Rural & UrBan e-Travelling - PowerPoint PPT Presentation


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Simulator integration: Vissim (Environment simulator) + NS2 (Telecom simulator) = RuBeNS Rural & UrBan e-Travelling Network Simulator. Péter Laborczi Sándor Kardos Attila Török Lóránt Vajda . Main goal.

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Simulator integration:Vissim (Environment simulator) + NS2 (Telecom simulator) =RuBeNSRural & UrBan e-Travelling Network Simulator

Péter Laborczi

Sándor Kardos

Attila Török

Lóránt Vajda

main goal
Main goal
  • Integrate environment simulator with telecommunications simulator to evaluate protocols for specific scenarios
    • Pile-up avoidance scenario (accident prevention)
    • Road traffic information scenario (traffic jam avoidance)
    • Ad hoc tempomat scenario (driving comfort)
example
Example
  • Floating Car Data:
    • Vehicle act as moving sensors
      • GPS
      • Weather sensors
      • Radar
  • Distributed
  • Centralized
emergency signalling implementation
Emergency signalling implementation
  • Purpose:
    • Test the effects of wireless emergency warning signalling
  • Why?
    • If legal restrictions forbid intervention (breaking), only signalling is possible
  • Implemented signalling
    • Vehicle detecting accidents broadcasts warning message
    • Messages are forwarded up to 1000m by cars
    • Equipped car drivers are notified when the message is received
    • Cars with no warning device notice the problem 1.5 seconds after the supposed reception
ad hoc traffic information sending handling
Ad hoc traffic information sending/handling
  • Purpose:
    • To avoid traffic jams without centralinfrastructure
  • Why?
    • Reduce travel times withouta single point of failure and maintainance costs
  • Implemented signalling
    • Equipped cars send travel time information
    • They receive information for all neighboringstreets
    • Based on this information they reroute whennecessary
gps module
GPS module
  • Purpose:
    • Realistic modelling of GPS errors
  • Why?
    • Crucial to prevent bump-ins
  • Error sources and modelled error [m]:
graph representation of road network
Graph representation of road network
  • Purpose:
    • To have a mathematically tractablemodel of the map
  • Why?
    • To be able to find shortest path (Dijkstra)between locations and be able to selectrelevant messages
  • Implementation of an online ”converter”from Vissim road network format to our(Boost library based) graph format
realworld map converter
Realworld map converter
  • Purpose:
    • Convert XML format mapfile to VISSIM format
  • Why?
    • To be able to simulatetraffic in real cities
  • Part of Budapest (BUTE surroundings) can nowbe examined within RuBeNS

BUTE

surroundings

Kalvin sqare

Danube

xml based traffic matrix handling
XML based traffic matrix handling
  • Purpose:
    • To have an easily usable trafficdescription
  • Why?
    • To be able to examine differenttraffic conditions
  • Implementation is based on xmlwrapp library
vehicular communication systems software modules
Vehicular communication systems - Software Modules

Linux

Windows

NS-2

VISSIM

Road traffic simulator

Application / Group comm.

interface

CommunicationProtocol

VISSIM interface

PHY

interface

TCP/IP Socket

TCP/IP Socket

four scenarios
Four Scenarios
  • Traditional see the DEMO
    • No equipped vehicles
  • Centralized FCD
  • Distributed FCD see the DEMO
    • Ad-hoc route guidance
  • Cooperative route guidance see the DEMO
lookout
Lookout
  • Simulation environment RUBeNS implemented to simulate:
    • Road network & vehicle traffic
    • Infocommunication network & data traffic
  • Different FCD approaches and communications simulated
  • More applications are under development:
    • Ad-hoc tempomat (ACC)
    • pile-up avoidance
    • Intelligent flooding protocol
  • Study of the communication network:
    • Load
    • Latency
    • Reliability