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Reliable and Swift Message Broadcast Method in Vehicular Ad Hoc Networks

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  • Jaesung Park
  • Yujin Lim

Abstract

A vehicular ad hoc network (VANET) could deliver safety-related messages reliably within a short time to increase road safety. Since safety-related messages should be sent to a set of unspecified receivers, they are delivered by broadcast method. However, the broadcast method specified in the IEEE 802.11p does not have a collision avoidance procedure and receivers do not acknowledge when they receive a broadcast frame. In addition, frames could be lost and corrupted. Therefore, as the portion of nodes that do not receive a broadcast frame increases, the effectiveness of a safety application decreases. To tackle the problem, we propose a reliable and swift message broadcast method (RSMB). In RSMB, to expedite message dissemination process, a relay node is selected in a distributed manner considering the progress made to a frame and the delay requirements of an application. In addition, a relay node broadcasts a message multiple times to assure that the probability that the other nodes successfully receive the message at least once is larger than a given threshold value. Since the number of rebroadcasts is regulated based on the successful message reception probability, the additional bandwidth needed to increase the reliability of broadcast is reasonably small.

Suggested Citation

  • Jaesung Park & Yujin Lim, 2015. "Reliable and Swift Message Broadcast Method in Vehicular Ad Hoc Networks," International Journal of Distributed Sensor Networks, , vol. 11(5), pages 219689-2196, May.
    • Handle: RePEc:sae:intdis:v:11:y:2015:i:5:p:219689
    DOI: 10.1155/2015/219689
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