The effectiveness of DSRC for collision avoidance depends on the communication performance of safety messages. EDCA, the standard IEEE 802.11 QoS capability, was designed for networks with a mix of voice, video and best effort traffic. This paper examines how to use EDCA to reduce frame collisions for a channel dominated by periodic safety messages. The paper makes two main contributions: Access Category (AC) Isolation and Virtual Division. AC Isolation eliminates inter-AC countdown collisions, dramatically improving the success rate for high priority packets. Virtual Division uses isolation in a novel way that also reduces collisions for lower priority packets. Both techniques are consistent with the 802.11 standard. The paper includes both detailed analysis and insightful NS-2 simulations.


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    Titel :

    Using EDCA to improve vehicle safety messaging


    Beteiligte:
    Sharafkandi, Sarah (Autor:in) / Bansal, Gaurav (Autor:in) / Kenney, John B. (Autor:in) / Du, David H.C. (Autor:in)


    Erscheinungsdatum :

    2012-11-01


    Format / Umfang :

    1130439 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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