Reliable multi-hop broadcast protocols for vehicular ad hoc networks have been widely discussed recently. However, most of them use acknowledgement based retransmissions to provide reliability. The retransmission method incurs delays when a packet loss cannot be detected on time. Acknowledgement messages also increase the MAC layer contention time at each node. In this paper, we propose a mechanism to use path diversity to provide the reliability. In the proposed mechanism, a message is disseminated by two different paths. By cooperation of these two paths, broadcast messages can be disseminated with a short delay and a high reliability compared with acknowledgement based retransmission approach. The proposed mechanism does not use any explicit acknowledgement message. We evaluate the proposed mechanism using both theoretical analysis and computer simulations.


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    Title :

    A broadcast path diversity mechanism for delay sensitive VANET safety applications


    Contributors:
    Wu, C. (author) / Ohzahata, S. (author) / Kato, T. (author)


    Publication date :

    2011-11-01


    Size :

    170517 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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