Random Backoff Scheme of Emergency Warning Message for Vehicle-to-Vehicle Communications 


Vol. 37,  No. 3, pp. 165-173, Mar.  2012


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  Abstract

In this paper, we propose a random backoff scheme for Emergency Warning Messages (EWMs) in the vehicle-to-vehicle environment. The EWMs are disseminated from a vehicle that detects an emergency situation to other vehicles in a multi-hop fashion. Since the vehicle-to-vehicle communication based on IEEE 802.11 adapts CSMA/CA, the density of vehicles increase the probability of collisions between transmissions. Moreover, in the presence of background traffic, the EWM should have a higher priority than that of other messages in neighboring vehicles. To that end, we propose the Distant-Dependent Adaptive Backoff (DDAB) scheme, which set a different contention window for random backoff depending on the distance from the sender to the receiver. In the case when a vehicle is expected to located in the outskirts of the communication boundary, the proposed scheme makes the contention window size small in order to compete the background traffic transmission. Otherwise the contention window is set to a large number to reduce the collision possibility among the EWM transmissions. Via simulations, we show that the proposed scheme performs better than the previous schemes for EWM.

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  Cite this article

[IEEE Style]

J. Byun and S. Kwon, "Random Backoff Scheme of Emergency Warning Message for Vehicle-to-Vehicle Communications," The Journal of Korean Institute of Communications and Information Sciences, vol. 37, no. 3, pp. 165-173, 2012. DOI: .

[ACM Style]

Jaeuk Byun and Sungoh Kwon. 2012. Random Backoff Scheme of Emergency Warning Message for Vehicle-to-Vehicle Communications. The Journal of Korean Institute of Communications and Information Sciences, 37, 3, (2012), 165-173. DOI: .

[KICS Style]

Jaeuk Byun and Sungoh Kwon, "Random Backoff Scheme of Emergency Warning Message for Vehicle-to-Vehicle Communications," The Journal of Korean Institute of Communications and Information Sciences, vol. 37, no. 3, pp. 165-173, 3. 2012.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880