Rethinking Transmit Power Control for SAE J3161/1 Congestion Control Algorithm

Hojeong Lee, Hyogon Kim

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


The Society of Automotive Engineers (SAE) has specified wireless channel congestion control algorithm for vehicle-to-everything (V2X) communication: J2945/1 for Dedicated Short Range Communication (DSRC) and J3161/1 for cellular V2X (C-V2X) environment. Although J2945/1 utilizes both transmit (Tx) power control and message rate control, the more recently specified J3161/1 standard for C-V2X environment has opted to abandon the power control. It is understandable as previous studies have demonstrated the inefficacy of power control in J2945/1, resulting in the rate control solely fighting congestion. Consequently, channel congestion leads to a fast increase in packet inter-reception time (PIR) and potentially tracking error. This letter advocates for the reinstatement of Tx power control in J3161/1 as a means to minimize PIR, while proposing a distinct approach from J2945/1 to show the feasibility of an effective combined control. Based on vehicle traffic engineering principles, the approach switches control modes to use power control to cope with increased vehicle density and rate control with increased channel utilization. It leads to significant improvements in packet delivery characteristics while more effectively managing channel load.

Original languageEnglish
Title of host publication2023 IEEE 98th Vehicular Technology Conference, VTC 2023-Fall - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350329285
Publication statusPublished - 2023
Event98th IEEE Vehicular Technology Conference, VTC 2023-Fall - Hong Kong, China
Duration: 2023 Oct 102023 Oct 13

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252


Conference98th IEEE Vehicular Technology Conference, VTC 2023-Fall
CityHong Kong

Bibliographical note

Publisher Copyright:
© 2023 IEEE.


  • SAE J2945/1
  • SAE J3161/1
  • Tx power control
  • V2X communication
  • congestion control
  • rate control

ASJC Scopus subject areas

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


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