Impact of quantized side information on subchannel scheduling for cellular V2X

Luis F. Abanto-Leon, Arie Koppelaar, Chetan Belagal Math, Sonia Heemstra de Groot

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

6 Citations (Scopus)
86 Downloads (Pure)


In Release 14, 3GPP completed a first version of cellular vehicle-to-everything (C-V2X) communications wherein two modalities were introduced. One of these schemes, known as \textit{mode-3}, requires support from eNodeBs in order to realize subchannel scheduling. This paper discusses a graph theoretical approach for semi- persistent scheduling (SPS) in \textit{mode-3} harnessing a sensing mechanism whereby vehicles can monitor signal-to-interference-plus-noise ratio (SINR) levels across sidelink subchannels. eNodeBs request such measurements from vehicles and utilize them to accomplish suitable subchannel assignments. However, since SINR values - herein also referred to as side information - span a wide range, quantization is required. We conclude that 3 bits per vehicle every 100 ms can provide sufficient granularity to maintain appropriate performance without severe degradation. Furthermore, the proposed algorithm is compared against pseudo-random and greedy SPS algorithms.

Original languageEnglish
Title of host publication2018 IEEE 87th Vehicular Technology Conference, VTC Spring 2018 - Proceedings
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Number of pages5
ISBN (Electronic)9781538663554
Publication statusPublished - 20 Jul 2018
Event87th Vehicular Technology Conference (VTC 2018-Spring)
- Porto, Portugal
Duration: 3 Jun 20186 Jun 2018
Conference number: 87


Conference87th Vehicular Technology Conference (VTC 2018-Spring)
Abbreviated titleVTC2018-Spring
Internet address


  • cellular V2X
  • safety applications
  • semi-persistent scheduling


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