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

Zhenhui Situ, Ivan Wang Hei Ho

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)


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).

Original languageEnglish
Title of host publicationSmart Grid and Innovative Frontiers in Telecommunications - 3rd International Conference, SmartGIFT 2018, Proceedings
EditorsPeter Han Joo Chong, Boon-Chong Seet, Michael Chai, Saeed Ur Rehman
Number of pages12
ISBN (Print)9783319949642
Publication statusPublished - 7 Jul 2018
Event3rd International Conference on Smart Grid and Innovative Frontiers in Telecommunications, SmartGIFT 2018 - Auckland, New Zealand
Duration: 23 Apr 201824 Apr 2018

Publication series

NameLecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST
ISSN (Print)1867-8211


Conference3rd International Conference on Smart Grid and Innovative Frontiers in Telecommunications, SmartGIFT 2018
Country/TerritoryNew Zealand


  • Network-coded multiple access
  • Non-orthogonal multiple access
  • Physical-layer network coding
  • Side information
  • V2X communication

ASJC Scopus subject areas

  • Computer Networks and Communications

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