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Black-Burst-Based Multihop Broadcast Protocols for Vehicular Networks. Gökhan Korkmaz, Eylem Ekici, and Füsun Özgüner Member , IEEE. IEEE TVT 2007. 5. 4. Outline. Introduction. 1. Directional Broadcast. 2. Intersection Broadcast. 3. Performance Evaluation. 4. Conclusion. - PowerPoint PPT Presentation
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Black-Burst-Based Multihop BroadcastProtocols for Vehicular Networks
Black-Burst-Based Multihop BroadcastProtocols for Vehicular Networks
Gökhan Korkmaz, Eylem Ekici, and Füsun Özgüner
Member, IEEE
IEEE TVT 2007
Outline
Introduction1
Directional Broadcast2
Intersection Broadcast3
4 Performance Evaluation
5 Conclusion
4
Introduction
In Intervehicular Communication (IVC) systems, broadcast is a frequently used method. Possible applications relying on broadcast include sharing emergency traffic weather road data among vehicles delivering advertisements announcements
Introduction
These applications generate packets of various lengths at different rates. accident warnings are short packets that are generated infrequently warning packets reporting slippery road conditions are generally
short advertisement packets can be broadcast in very long packets that
carry pictures, directions, or even short videos
Related Work
Source
Destination
A
B
CD
Goal
Design a special MAC layer for efficient and reliable multihop message dissemination in VANETs address the broadcast storm, hidden node, and reliability problems
of multihop broadcast in vehicular networks.
Directional Broadcast
Request to Broadcast (RTB) Packet
<Position, Intended Broadcast Direction>
Intended Broadcast Direction
Source
AB
C
Black-burst signal
Directional Broadcast
Request to Broadcast (RTB) Packet
<Position, Intended Broadcast Direction>
Intended Broadcast Direction
Source
AB
C
Black-burst signal
1
Duration of the Black-burst
SlotTimeR
NdL
max
1
L1 : black-burst duration in the first iteration
d : the distance between the source and the vehicle
R : the transmission range
Nmax : number of segments created
SlotTime : length of one slot
0 2
Duration of the Black-burst
SlotTimeR
NdL
max
1
030
35max
1
SlotTimeSlotTime
R
NdL
Source
10 10 10
SlotTimeSlotTimeSlotTimeR
NdL
2
30
325max
1
Duration of the Black-burst
Source
Duration of the Black-burst
Source
Intersection Broadcast
Urban Multihop Broadcast (UMB)Obstacle
Vehicle
Infrastructure
Intersection Broadcast
Ad hoc Multihop Broadcast (AMB) Vehicle
BA C
D
E
F
Hunter Vehicle
Performance Evaluation
Success Probability Comparison
Performance Evaluation
Successful Packet Delivery Percentage
Performance Evaluation
Packet Dissemination Speed
Conclusion
Two position-based multihop broadcast protocols for IVC networks have been proposed
The UMB protocol employs repeaters installed at the intersections. AMB is an extension of the UMB protocol with a fully ad hoc intersection
broadcast mechanism.
Design a special MAC layer for efficient and reliable multihop message dissemination in VANETs address the broadcast storm, hidden node, and reliability problems of
multihop broadcast in vehicular networks.