1 / 22

Fast and Reliable Emergency Message Dissemination Mechanism in Vehicular ad-hoc Networks

Fast and Reliable Emergency Message Dissemination Mechanism in Vehicular ad-hoc Networks. 1 Jeng-Farn Lee, 1 Chang-Sheng Wang , 1 Ming-Chin Chunag 1 Department of Computer Science and Information Engineering National Chung Cheng University, Chia-Yi, Taiwan, R.O.C. WCNC 2010. Outline.

rufina
Download Presentation

Fast and Reliable Emergency Message Dissemination Mechanism in Vehicular ad-hoc Networks

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fast and Reliable Emergency Message Dissemination Mechanism in Vehicular ad-hoc Networks 1Jeng-Farn Lee, 1Chang-Sheng Wang ,1Ming-Chin Chunag 1Department of Computer Science and Information Engineering National Chung Cheng University, Chia-Yi, Taiwan, R.O.C. WCNC 2010

  2. Outline • Introduction • Fast and Reliable Emergency Message Dissemination Mechanism • Performance Analysis • Conclusions

  3. Introduction • Advanced technologies • GPS • power-saving embedded computer • wireless communication system

  4. introduction

  5. Introduction • A. Message Forwarding • 1) Random Time Slot • 2) Adjacency Sectors • B. Reliability • 1) ACK Frame • 2) Repetition scheme

  6. introduction • Goals • Low dissemination delay • High reliability • How • Fast and reliable emergency message dissemination mechanism (FR-EDM)

  7. Fast and Reliable Emergency Message Dissemination Mechanism(FR-EDM) • Assume: • Freeway • GPS • Intelligent transportation system(ITS)

  8. FR-EDM • When a car accident happened • 1)Is it a new message ? • 2)is the message delivered from vehicle in front of me?

  9. FR-EDM • Fast Forwarding • GPS

  10. FR-EDM Ox: length of block Oy: wide of block Area: size of transmission area

  11. FR-EDM • The value of block size • 4m*4m,8m*8m,16m*16m

  12. FR-EDM • The value of block size • 4m*4m,8m*8m,16m*16m

  13. FR-EDM • The value of block size • 4m*4m,8m*8m,16m*16m

  14. FR-EDM

  15. FR-EDM

  16. FR-EDM • Reliability mechanism • rebroadcast n :the number of vehicles in the transmission range P:channel loss ratio

  17. FR-EDM • Reliability mechanism • rebroadcast

  18. Performance Analysis

  19. Performance Analysis

  20. Performance Analysis

  21. Performance Analysis

  22. Conclusions • We propose a fast and reliable emergency message dissemination mechanism (FR-EDM) • In the simulation results, our protocol achieves the low disseminating delay and high reliability while disseminating the emergency message

More Related