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Black-Burst-Based Multihop Broadcast Protocols for Vehicular Networks

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.

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Black-Burst-Based Multihop Broadcast Protocols for Vehicular Networks

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  1. Black-Burst-Based Multihop BroadcastProtocols for Vehicular Networks Gökhan Korkmaz, Eylem Ekici, and Füsun Özgüner Member, IEEE IEEE TVT 2007

  2. 5 4 Outline Introduction 1 Directional Broadcast 2 Intersection Broadcast 3 Performance Evaluation 4 Conclusion

  3. 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

  4. 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

  5. Related Work Source Destination D C B A

  6. 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.

  7. Directional Broadcast Intended Broadcast Direction Source B A Black-burst signal C Request to Broadcast (RTB) Packet <Position, Intended Broadcast Direction>

  8. Directional Broadcast Intended Broadcast Direction Source B A Black-burst signal C Request to Broadcast (RTB) Packet <Position, Intended Broadcast Direction>

  9. Duration of the Black-burst 0 1 2 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

  10. Duration of the Black-burst Source 10 10 10

  11. Duration of the Black-burst Source

  12. Duration of the Black-burst Source

  13. Intersection Broadcast Obstacle • Urban Multihop Broadcast (UMB) Vehicle Infrastructure

  14. Intersection Broadcast Vehicle • Ad hoc Multihop Broadcast (AMB) Hunter Vehicle D A C F B E

  15. Performance Evaluation • Success Probability Comparison

  16. Performance Evaluation • Successful Packet Delivery Percentage

  17. Performance Evaluation • Packet Dissemination Speed

  18. 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.

  19. Thank You !

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