SLIDE 1
- Introduction
- Problems
- EWM Dissemination in VSNs
- Conclusion
Contents
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Emergency Messages in VSNs By: Noor Ullah Contents Introduction - - PowerPoint PPT Presentation
Emergency Messages in VSNs By: Noor Ullah Contents Introduction - - PowerPoint PPT Presentation
Emergency Messages in VSNs By: Noor Ullah Contents Introduction Problems EWM Dissemination in VSNs Conclusion 2 Introduction Emergency Situations Accidents Natural Disasters VANETs Vehicular communication
SLIDE 2
SLIDE 3
- Emergency Situations
– Accidents – Natural Disasters
- VANETs
– Vehicular communication – Safety purpose – Infotainment purpose
Introduction
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SLIDE 4
- Emergency Warning Messages
– Issued by source vehicle – Broadcast to effected area – V2V – V2I
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Introduction
SLIDE 5
- Flooding [1]
– Every Node rebroadcasts every message
- Faces Broadcast Storm Problem
- Epidemic [2]
– Shares all messages in buffer upon each contact – Negotiates which messages to share
- Creates Delay, Overhead
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Introduction Contd...
1.
- K. Obraczka, K. Viswanath, and G. Tsudik, “Flooding for reliable multicast in multi-hop ad hoc networks,”
Wireless Networks, vol. 7, no. 6, pp. 627–634, 2001 2.
- A. Vahdat and D. Becker, “Epidemic Routing for Partially Connected Ad Hoc Networks,” in Technical Report CS-
200006, Apr 2000.
SLIDE 6
- Every node rebroadcasts
– Network congestion – Crash down
Broadcast Storm Problem
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SLIDE 7
- Access Point (AP) knows about Nodes
- Nodes may not know about AP
– Collision – Distortion
Hidden Node Problem
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SLIDE 8
- Exploiting human factors
– Social relationships – Direct/Indirect
- Vehicular Mobility
– Common routes – Patterns
- Communication means
– WAVE/DSRC, cellular etc
Vehicular Social Networks
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a b c d e f
SLIDE 9
- “Vehicular Social Networks: Enabling Smart
Mobility”
– In IEEE Communication Magazine
- Smart Cities
– Integration of innovative technologies for management of city’s facilities
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Our Paper on VSN
SLIDE 10
- Selfishness
– Social selfishness
- Delay
- Simulation and Analysis
– Real Databases cannot be used – Relies on simulation
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Challenges for EWMs in VSNs
SLIDE 11
- Vehicular Location Data
– Coordinates, distance b/w two vehicles from GIS
- Social features
– Centrality, similarity, community etc
- Suitable dissemination strategy
Proposed Method
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X1, y1 Xn, yn Danger Zone Immediate Zone Social Zone
SLIDE 12
- VANETMobisim
– Generates traces of vehicles mobility – Java based application – Xml coding
- NS2
– Famous network modeling simulator
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Simulation Tools
SLIDE 13
- EWMs dissemination is important
- Different problems exist
- Solutions based on VSNs have to be explored
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Conclusion
SLIDE 14
Suggestions are Welcome!
Any Questions?
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