Smart Grid and Innovative Frontiers in Telecommunications. Third International Conference, SmartGIFT 2018, Auckland, New Zealand, April 23-24, 2018, Proceedings

Research Article

NO-V2X: Non-orthogonal Multiple Access with Side Information for V2X Communications

  • @INPROCEEDINGS{10.1007/978-3-319-94965-9_14,
        author={Zhenhui Situ and Ivan Ho},
        title={NO-V2X: Non-orthogonal Multiple Access with Side Information for V2X Communications},
        proceedings={Smart Grid and Innovative Frontiers in Telecommunications. Third International Conference, SmartGIFT 2018, Auckland, New Zealand, April 23-24, 2018, Proceedings},
        proceedings_a={SMARTGIFT},
        year={2018},
        month={7},
        keywords={Non-orthogonal multiple access V2X communication Side information Physical-layer network coding Network-coded multiple access},
        doi={10.1007/978-3-319-94965-9_14}
    }
    
  • Zhenhui Situ
    Ivan Ho
    Year: 2018
    NO-V2X: Non-orthogonal Multiple Access with Side Information for V2X Communications
    SMARTGIFT
    Springer
    DOI: 10.1007/978-3-319-94965-9_14
Zhenhui Situ1,*, Ivan Ho,*
  • 1: The Hong Kong Polytechnic University
*Contact email: z.situ@connect.polyu.hk, ivanwh.ho@polyu.edu.hk

Abstract

We study a vehicle-to-everything (V2X) communication scenario where multiple vehicles coming from different road segments converge at a road junction and exchange their information via a road side unit. The high-mobility of vehicles determines that the communication is time-critical. If conventional orthogonal multiple access (OMA) is applied, not only the orthogonal resource allocation but also the scheduling overheads will incur significant delay. In addition, orthogonal domain may not be identified within short contact time among vehicles and the road-side unit. In contrast, non-orthogonal multiple access (NOMA) can provide low-delay and reliable communication by exploiting the overlapped or collided signals. In this paper, we investigate the application of NOMA with side information in V2X communications as the Non-orthogonal V2X (NO-V2X) scheme. NO-V2X takes the advantage of side information and physical-layer network coding (PNC) to increase the decoding success rate in the uplink phase and to reduce the required transmission power in the downlink phase. Our simulation results show that NO-V2X outperforms OMA and the conventional NOMA with successive interference cancellation (SIC).