A Defensive Scheduling Scheme to Accommodate Random Selection Devices in 5G NR V2X

Youngjoon Yoon, Hyeonji Seon, Hyogon Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The newly completed 3GPP Release 16 for 5G New Radio (NR) vehicle-to-everything (V2X) communication assumes that all participating devices can continually sense the channel activities in terms of resource use. However, many non-vehicular devices such as smartphones of vulnerable road users (VRUs) and road-embedded sensors are constrained by battery, and cannot afford such 'always-on' sensing. The deficiency will have undesirable impact on the existing resource allocation algorithm in the envisioned NR V2X integrated framework. As we start the efforts towards Release 17, therefore, there is a pressing need to develop a solution to smoothly integrate the limited-sensing devices into the framework. This letter develops a solution based on the new features available in Release 16 NR Sidelink Mode 2, such as resource reservation pointers and resource pre-emption checks. We demonstrate that a defensive transmission strategy employed by the full-sensing devices that jitters their transmissions around the resource double-booked by the limited-sensing devices can significantly mitigate the packet delivery performance degradation for both the full-sensing and the limited-sensing devices.

Original languageEnglish
Article number9348951
Pages (from-to)2068-2072
Number of pages5
JournalIEEE Communications Letters
Issue number6
Publication statusPublished - 2021 Jun


  • 5G
  • NR
  • V2X
  • defensive scheduling
  • random selection devices
  • resource allocation
  • sidelink mode~2

ASJC Scopus subject areas

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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