Refining Packet Collision Check in Resource Allocation for NR Sidelink Mode 2

Sumin Lee, Hyungjoon Shin, Hyogon Kim

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


To enable direct vehicle-to-vehicle communication in 3GPP New Radio (NR) Sidelink Mode 2, each vehicle must autonomously select radio radio resource to use by using Sensing-based semi-persistent-scheduling (SB-SPS) algorithm. SB-SPS helps avoid packet collisions through determining whether or not selecting a particular resource inside the resource selection window will cause a collision with other vehicle's transmission. This paper shows that such check is insufficient because packet collisions can still occur beyond the selection window due to various combinations of resource reservation periods allowed in the NR Sidelink Mode 2 in Release 16. In order to solve the problem and further reduce packet collisions currently unchecked by SB-SPS, a resource scoring method and a Received Signal Strength Indicator (RSSI)-based scoring assistance scheme are proposed. Simulation experiments show that the proposal reduces the number of total packet collisions and the number of consecutive collision events by 15-25% compared to SB-SPS.

Original languageEnglish
Title of host publication2023 IEEE 97th Vehicular Technology Conference, VTC 2023-Spring - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350311143
Publication statusPublished - 2023
Event97th IEEE Vehicular Technology Conference, VTC 2023-Spring - Florence, Italy
Duration: 2023 Jun 202023 Jun 23

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252


Conference97th IEEE Vehicular Technology Conference, VTC 2023-Spring

Bibliographical note

Publisher Copyright:
© 2023 IEEE.


  • NR
  • Sidelink Mode 2
  • V2X
  • packet collision
  • resource allocation
  • sensing-based semi-persistent scheduling

ASJC Scopus subject areas

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


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