We study the feasibility of IEEE 802.11p unicast communication in Vehicular Ad Hoc Networks (VANETs). In brief, we found unicast communication using MAC acknowledgement frames (ACKs) to be unsuitable for vehicular networks, because missing ACKs make protocol operations susceptible to pronounced head of line blocking effects. Worse, a transmit queue that is blocked by a missing ACK will delay messages for all protocols running on the same node that use the same access category. Other than in traditional networks, missing ACKs are especially prevalent in VANETs due to their high topology dynamics. Depending on the scenario, delays of messages could be shown to reach 200 ms and beyond - above the tolerable range of many VANET applications. Our findings are based on analytical calculations, measurements on hardware, as well as computer simulations; we conducted simulations both at small scale, for a baseline validation, and at a macroscopic level, to gauge the impact on a more complex protocol.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    IEEE 802.11p unicast considered harmful


    Contributors:


    Publication date :

    2015-12-01


    Size :

    1985669 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Channel estimation schemes for IEEE 802.11p standard

    Zhao, Zijun | Online Contents | 2013


    IEEE 802.11p performance evaluation and protocol enhancement

    Yi Wang, / Ahmed, Akram / Krishnamachari, Bhaskar et al. | IEEE | 2008


    Analytical study of the IEEE 802.11p EDCA mechanism

    Sun, Wei / Zhang, Hesheng / Pan, Cheng et al. | IEEE | 2013


    Empirical IEEE 802.11p performance evaluation on test tracks

    Demmel, Sebastien / Lambert, Alain / Gruyer, Dominique et al. | IEEE | 2012


    Empirical IEEE 802.11p Performances Evaluation on Test Tracks

    Demmel, S. / Lambert, A. / Gruyer, D. et al. | British Library Conference Proceedings | 2012