Persistent Scheduling with Broadcast Feedback for Cellular V2X Communication

Youngjoon Yoon, Junwon Kang, Hyogon Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


In New Radio (NR) Sidelink Mode 2 for vehicle-to-everything (V2X) communication, each vehicle autonomously selects the wireless resource through sensing-based resource selection and reservation. Since perfect sensing and coordination in distributed scheduling is impossible, resource collisions in the resource reservation are unavoidable. NR V2X copes with the problem by frequently changing resources, which also helps resolve the resource collisions with the vehicles that newly come into the mutual communication range. However, the random and frequent hopping between resources can itself cause resource collisions, which eventually leads to performance degradation by reducing the effectiveness of sensing. In this paper, we explore an alternative approach that does not require such frequent resource switching. We use a persistent scheduling where the selected resource is not changed unless there is an actual resource collision. To cope with the coincidental resource collisions, however, we supplement it with a broadcast feedback scheme. We show that the proposed scheduling approach leads to better performance than the standard semi-persistent scheduling scheme in terms of packet reception ratio (PRR), number of persistent collisions, and the length of consecutive collision events. The performance edge is maintained even with vehicle population churn.

Original languageEnglish
Title of host publication2021 IEEE 93rd Vehicular Technology Conference, VTC 2021-Spring - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728189642
Publication statusPublished - 2021 Apr
Event93rd IEEE Vehicular Technology Conference, VTC 2021-Spring - Virtual, Online
Duration: 2021 Apr 252021 Apr 28

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252


Conference93rd IEEE Vehicular Technology Conference, VTC 2021-Spring
CityVirtual, Online

Bibliographical note

Funding Information:
ACKNOWLEDGMENT This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No. 2020R1A2C3011888).

Publisher Copyright:
© 2021 IEEE.


  • NR V2X
  • Semi-Persistent Scheduling (SPS)
  • Sidelink Mode 2
  • feedback
  • inband emission (IBE)
  • packet collisions
  • persistent scheduling

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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