FRIEND: A Cyber-Physical System for         Traffic Flow Related Information          aggrEgatioN and Dissemination       ...
Agenda   Introduction   Motivation   Cyber-Physical System      Node Definition      Data Required      Communicatio...
Introduction   Vehicular Ad-Hoc Network (VANET) is a    type of Mobile Ad-hoc Network that allows    communications betwe...
Motivation   Several applications have been proposed to solve a problem in traffic.   By integrating resources and capab...
Cyber-Physical System – Node Definition  Smart Cats Eye (SCE)      new functionality on top of cats eye retro-reflectors ...
Cyber-Physical System- More Node Definition   Roadside Unit (RSU)        consist of a small computing center connected w...
Cyber-Physical System- Extra Node Definition  Moving nodes which are vehicles:  Radar  Electronic Stability Control (ES...
Cyber-Physical System -Data Collection and Information to maintain   Vehicles keep track of:      Speed      Accelerati...
Data Exchange and Communication between  FRIEND’s NodesVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab             ...
FRIEND - Incident Detection   Using RSU(s) and/or SCE(s).   RSU(s) receive a report from EDR (taking into account privac...
FRIEND – Information Propagation   Our idea of information propagation depends on two main    factors: traffic density an...
FRIEND – Information Propagation  Stage I : Direct propagation   Our system divides the area behind an incident into two ...
FRIEND – Information Propagation  Stage I : Direct propagationVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab      ...
FRIEND – Information Propagation  Stage I : Direct propagationVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab      ...
FRIEND – Information Propagation  Stage II : Tracking Head and Tail of an event   We define a Head of the accident and a ...
FRIEND – Information Propagation  Stage II : Tracking Head and Tail of an event                                           ...
Simulation and Evaluation   We evaluate our frame work using ONE simulator , which is the    Opportunistic Network Enviro...
Evaluations   In evaluation, simulation data is analyzed to get the optimal value of    number of SCE needed to communica...
Examples of Applications     Incident Detection     Traffic Monitoring     Weather Alert System     Traffic Informatio...
Classification of ApplicationsVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab                                      ...
Conclusion We presented a new cyber-physical system called FRIEND for incident  detection on highways and dissemination o...
Questions?  Please visit the Intelligent Networking and Systems (iNetS)  Research Group in the Department of Computer Scie...
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FRIEND: A Cyber-Physical System for Traffic Flow Related Information aggrEgatioN and Dissemination

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VANETs from Theory to Practice (VTP 2012)
San Francisco, California, USA
June 25th , 2012

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FRIEND: A Cyber-Physical System for Traffic Flow Related Information aggrEgatioN and Dissemination

  1. 1. FRIEND: A Cyber-Physical System for Traffic Flow Related Information aggrEgatioN and Dissemination Samy El-Tawab, Stephan Olariu and Mohammad Almalag Old Dominion University Department of Computer Science Norfolk, Virginia, USA VANETs from Theory to Practice (VTP 2012) San Francisco, California, USA June 25th , 2012VTP 2012, San Francisco, CA, USA Samy El-Tawab June 25th, 2012
  2. 2. Agenda  Introduction  Motivation  Cyber-Physical System  Node Definition  Data Required  Communication  Incident Detection  Information Dissemination and Propagation  Simulation and Evaluation  Classification of Applications  ConclusionVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 2 2
  3. 3. Introduction  Vehicular Ad-Hoc Network (VANET) is a type of Mobile Ad-hoc Network that allows communications between nearby vehicles and between vehicles and “roadside infrastructure”.  We need an Intelligent Transportation System (ITS) that can alert drivers to traffic- related events and weather/road conditions.  Car manufacturers are offering new applications: Internet access, Traffic information, movie download…etc.VTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 3 3 * Photo Credit : http://media.nowpublic.net/images
  4. 4. Motivation  Several applications have been proposed to solve a problem in traffic.  By integrating resources and capabilities at the nexus between the cyber and physical worlds, FRIEND will contribute to aggregating traffic flow data collected by the huge fleet of vehicles on our roads into a comprehensive, near real-time synopsis of traffic flow conditions.  FRIEND  it is built on existing infrastructure  provide accurate information about traffic flow and can be used to propagate this informationVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 4
  5. 5. Cyber-Physical System – Node Definition  Smart Cats Eye (SCE) new functionality on top of cats eye retro-reflectors  The cat’s eye nodes are deployed uniformly along the road on both sides  Increase the functionality of the cats eye nodes by A short-range radio transceiver A metal detector sensor A simple embedded processor Waterproof and unbreakable: solar panel  With these additions the cats eyes form a network that can be used to Detect traffic parameters Infer the occurrence or imminence of traffic events Disseminate the information about average speed and density (number of vehicles per time period) to the other nodes of the network.VTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 5
  6. 6. Cyber-Physical System- More Node Definition  Roadside Unit (RSU)  consist of a small computing center connected with a solar panel, rechargeable battery and communication capability  deployed at regular intervals  the role of the RSUs is to collect and aggregate traffic-related information from the passing cars as well as by interchanging information, on an intermittent basis with adjacent RSUsVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 6
  7. 7. Cyber-Physical System- Extra Node Definition  Moving nodes which are vehicles:  Radar  Electronic Stability Control (ESC)  Cameras  Event Data Recorder (EDR)  Global Positioning System (GPS)  Smart Wheels  Communication Capability (DSRC)VTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 7 7
  8. 8. Cyber-Physical System -Data Collection and Information to maintain  Vehicles keep track of:  Speed  Acceleration  Position  Lane change  Headway distanceVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 8
  9. 9. Data Exchange and Communication between FRIEND’s NodesVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012
  10. 10. FRIEND - Incident Detection  Using RSU(s) and/or SCE(s).  RSU(s) receive a report from EDR (taking into account privacy and security) about any lane change occurs in previous segment of the highway.  A threshold of lane changing in a certain position conclude an existing of blocking incident.VTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 10 10
  11. 11. FRIEND – Information Propagation  Our idea of information propagation depends on two main factors: traffic density and the duration of an accident or event.  The longer it takes to clear the event, the further the information needs to be propagated.  The denser the traffic, the faster it will back up.  Propagate information as a function of density and time.  Drivers would like to receive information that affects their decision rather than just notification about incidents that will be solved by the time they reach this point on the highwayVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 11 11
  12. 12. FRIEND – Information Propagation Stage I : Direct propagation  Our system divides the area behind an incident into two stages. It defines stage I as the area behind the incident where the cars need to be notified in order to prevent a Secondary Accident.  The longer the accident stays, the more often we send messages to coming vehicles.  We focus on the first goal which notifying vehicles with short distance to an accident.VTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 12 12
  13. 13. FRIEND – Information Propagation Stage I : Direct propagationVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 13
  14. 14. FRIEND – Information Propagation Stage I : Direct propagationVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 14
  15. 15. FRIEND – Information Propagation Stage II : Tracking Head and Tail of an event  We define a Head of the accident and a Tail of the accident. The head of the accident is the place where is the source of the backup exists (xh0,yh0).  In case of a slow movement of vehicles after accident is clear. Head is updated with new values of (xh1, yh1). Also, Tail is updated if the backup exceed D (specific distance from data management centers)VTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 15 15
  16. 16. FRIEND – Information Propagation Stage II : Tracking Head and Tail of an event Distance Backward the accident 0 G1 (HEAD) G2 G3 Gi (TAIL) Accident Cleared, Vehicles are moving faster than backup 0 G1 G2 (HEAD) G3 Gi (TAIL) Accident Cleared, Vehicles are moving slower than backup 0 G1 G2 (HEAD) G3 Gi+1 (TAIL)VTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 16
  17. 17. Simulation and Evaluation  We evaluate our frame work using ONE simulator , which is the Opportunistic Network Environment simulator  It allows to visualize both mobility and message passing in real time in its graphical user interface.  ONE can import mobility data from real-world traces or other mobility generators. It can also produce a variety of reports from node movement to message passing and general statisticsVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 17 17
  18. 18. Evaluations  In evaluation, simulation data is analyzed to get the optimal value of number of SCE needed to communicate together to detect vehicles.  To detect all vehicles moving with maximum speed of 55mile/hr, we expected that the larger the size of node, the more able to detect the vehicles on the highway.  At the same time, we cannot increase the size more than 4 nodes as it will disconnect nodes and prevent communication.  Four nodes in a range of 100 meters are sufficient to detect all vehicles.VTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 18
  19. 19. Examples of Applications  Incident Detection  Traffic Monitoring  Weather Alert System  Traffic Information  Data CenterVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 19 19 * Photo Credit :http://www.roadtraffic-technology.com/
  20. 20. Classification of ApplicationsVTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 20
  21. 21. Conclusion We presented a new cyber-physical system called FRIEND for incident detection on highways and dissemination of information. We described our nodes definition and how incident detection is done. We explained the technique of tracking the Head and Tail of a backup and how information propagation is handled. We provided application classification in VANET.VTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 21
  22. 22. Questions? Please visit the Intelligent Networking and Systems (iNetS) Research Group in the Department of Computer Science at Old Dominion University: http://www.cs.odu.edu/~inets/ Samy El-Tawab (tel@cs.odu.edu) VTP 2012, San Francisco, CA, USA PhD Proposal El-Tawab Samy - Samy El-TawabJune 25th, 2012 22 *Photo Credit: http://blog.doostang.com

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