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

3 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

Bibliographical note

Funding Information:
Manuscript received January 13, 2021; revised February 2, 2021; accepted February 3, 2021. Date of publication February 5, 2021; date of current version June 10, 2021. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1A2C3011888). The associate editor coordinating the review of this letter and approving it for publication was K. Rajawat. (Corresponding author: Hyogon Kim.) The authors are with the Department of Computer Science and Engineering, Korea University, Seoul 02841, South Korea (e-mail: hyogon@korea.ac.kr). Digital Object Identifier 10.1109/LCOMM.2021.3057451

Publisher Copyright:
© 1997-2012 IEEE.


  • 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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