Vehicular communications, considered as one of the key technologies for autonomous driving, are still faced with significant challenges, e.g., distributed resource allocation in the direct communication mode. In Cellular Vehicle-to-Everything (C-V2X), a Semi-Persistent Scheduling (SPS) based Medium-Access-Control (MAC) layer protocol is adopted by 3rd Generation Partnership Project (3GPP) for its sidelink communications. However, the performance of either the SPS scheme in standard or the state-of-the-art enhancement works is not satisfactory. In this paper, we propose a piggyback-based collaboration method and firstly introduce Age of Information (AoI) to evaluate the status update performance of C-V2X. In addition, the closed-form AoI performance is obtained. Through extensive simulations, the proposed scheme exhibits better performance than the current schemes, both in terms of AoI and transmission reliability.


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    Title :

    Piggyback-Based Distributed MAC Optimization for V2X Sidelink Communications


    Contributors:
    Peng, Fei (author) / Jiang, Zhiyuan (author) / Zhang, Shunqing (author) / Xu, Shugong (author)


    Publication date :

    2020-11-01


    Size :

    1436057 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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