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Rahul Mangharam, D' Weller, D' Stancil, Raj Rajkumar

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Regions are determined by position, speed and direction ... Vehicles migrate to roads with higher speed limits. GM-CMU Collaborative Research Laboratory ... – PowerPoint PPT presentation

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Title: Rahul Mangharam, D' Weller, D' Stancil, Raj Rajkumar


1
GrooveSim A Topography-Accurate Simulator for
Geographic Routing in Vehicular Networks
  • Rahul Mangharam, D. Weller, D. Stancil, Raj
    Rajkumar
  • rahul_at_cmu.edu
  • General Motors-CMU Collaborative Research
    Laboratory
  • Carnegie Mellon University
  • Jay Parikh, General Motors
  • ACM VANET, Cologne, Germany. 2 September 2005

2
Outline
  • The GM-CMU Collaborative Research Lab
  • On-Road GM-CMU CRL Vehicular Networking Test-bed
  • The GrooveSim Simulator
  • Market Penetration to make v2v useful?
  • Performance in urban, rural and highway?
  • What mix of mobile gateways, infrastructure and
    on-board wireless?
  • Which multi-hop protocols work best and under
    what conditions?
  • Evaluation
  • Conclusions

3
The GM-CMU Collaborative Research Lab
  • Operational since Jan 1, 2000
  • Over 15 CMU faculty members and 15 graduate
    students
  • Close collaboration with researchers from General
    Motors
  • Projects on
  • Vehicular networking
  • Dependable architectures and software
  • Human-machine interfaces
  • Wireless sensor communications

4
Experimental Multi-hop Vehicular Network Test-bed
5.9 GHz DSRC Dedicated Short Range Communications
Between vehicles
GPS
Differential GPS reference station beacons
Mobile Nodes
  • Vehicle-to-Vehicle Multi-hop
  • Vehicle-to-Mobile Gateway
  • Vehicle-to-Infrastructure

5
Vehicular Networking Application Categories
  • Safety Alerts
  • Sudden Braking
  • Airbag deployment
  • Skidding
  • Traffic Congestion Probing
  • Travel Time
  • Dynamic Route Planning
  • Road Condition Notification
  • Interactive Applications
  • Social Networking
  • Multimedia Content Exchange
  • Advertising

6
GrooveNet Test Kit
LAPTOP w/ RADIO CARD
GPS RECEIVER
GPS ANTENNA
POWER CORD (12 DC)
5.8 GHz ANTENNAS
WEB CAM
HEADPHONES W/ MICROPHONE
  • Driven 5 vehicles over 400 miles Urban, Rural
    and Highway
  • Over 625,000 link measurements

7
GeoRoute Broadcast Scenarios
Highway Driving City
Driving Rural Driving
  • Path with Intermediate points
  • Static Source Routing
  • Radial Broadcast
  • Bounding Box
  • Controlled Flooding

8
GrooveSim Hybrid Simulator for Vehicular Networks
Five Modes of Operation
  • Drive On-road communication, tracking, logging
  • Over 400 miles driven with 5 vehicles
  • Test Robustness of Protocol
  • Simulate Over 5,000 concurrent vehicles Anywhere
    in the US
  • Scalability Performance Analysis over City,
    Rural, Highway
  • Playback Visual Performance Analysis
  • Networking, Propagation, GPS Performance
  • Hybrid Simulate Mix Real Virtual Vehicles
  • Effect of real Traffic and Channel
  • Test Generation Easy Large-scale test setup

9
On-Road Tests
  • Over 400 miles of on-road testing with a group of
    5 vehicles
  • Signal Attenuation (20-50 mph) Approx. 100m
    range
  • Packet error lt 10
  • Parallel effort on vehicle-to-vehicle channel
    modeling

10
GrooveSim On-Road Alerts (1)
  • Broadcast Safety Alerts to all vehicles in the
    vicinity
  • Messages are valid in a specific geographic
    region
  • Regions are determined by position, speed and
    direction

11
GrooveSim On-Road Alerts (2)
  • Only vehicles in the relevant geographic region
    receive alerts

12
On-Road Geographic Routing Tests
  • GPS-enabled routing
  • All vehicles West of event receive alert messages
  • 50m accuracy at 40mph

13
On-Road Circular Routing Region Tests
Reject ALERT Invalid Region
Accept ALERT Valid Region
  • Geographic Region using Event heading Position
  • Targets messages to approaching vehicles only
  • Opposite direction vehicles forward messages but
    do not accept

14
GrooveSim Large Scale Vehicle Network Simulator
15
1,000 Vehicles in Chicago, IL suburb
Routed with Minimum Cost Routing
16
v2v Degrees of Freedom Metrics
  • Degrees of Freedom
  • Speed
  • Temporal Vehicle density
  • Spatial Vehicle density
  • Travel direction
  • Size of routing region
  • Message rebroadcast frequency
  • Transmission power
  • Performance Metrics
  • Message Penetration Distance
  • Message Delay
  • Message Lifetime

17
Vehicular Network Modeling
  • Mobility Model
  • Speed Uniform, Street Speed, Markov Model,
    Load-based model
  • Trip Model
  • Random walk, Explicit Origin-Destination,
    Distributed Origin-Destination
  • Communication Model
  • Channel Model and Multiple Access Model
  • Traffic Model
  • Start time distribution, use real or synthetic
    traces

18
Minimum Weight Routing
Vehicles migrate to roads with higher speed limits
19
Performance Message Propagation Distance
20
Performance Message Lifetime
21
Performance Message Delay
22
GrooveSim is Easy to Use
23
GrooveSim Conclusion
  • GrooveSim Five modes of operation
  • Drive
  • Simulate
  • Visual Playback
  • Test Generation
  • Hybrid Simulation
  • Realistic Simulation of thousands of vehicles in
    US locations
  • Basic Vehicular Network Models
  • Trip
  • Mobility Speed and direction
  • Traffic Density in time and space
  • Communication
  • Over 400 miles on-road driving
  • Realistic network and channel models

24
GrooveSim Public Domain Release
  • GrooveSim is available for research use at
  • http//www.ece.cmu.edu/rahulm/GrooveSim
  • Easily Extensible for Customized Models
  • Extend Models Super Classes
  • Enhance Vehicle Navigation Graph-based approach
  • Modify Log Files

25
(No Transcript)
26
GrooveSim Speed Models
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