Using EDCA to improve vehicle safety messaging

Sarah Sharafkandi, Gaurav Bansal, John B. Kenney, David H Du

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

7 Scopus citations


The effectiveness of DSRC for collision avoidance depends on the communication performance of safety messages. EDCA, the standard IEEE 802.11 QoS capability, was designed for networks with a mix of voice, video and best effort traffic. This paper examines how to use EDCA to reduce frame collisions for a channel dominated by periodic safety messages. The paper makes two main contributions: Access Category (AC) Isolation and Virtual Division. AC Isolation eliminates inter-AC countdown collisions, dramatically improving the success rate for high priority packets. Virtual Division uses isolation in a novel way that also reduces collisions for lower priority packets. Both techniques are consistent with the 802.11 standard. The paper includes both detailed analysis and insightful NS-2 simulations.

Original languageEnglish (US)
Title of host publication2012 IEEE Vehicular Networking Conference, VNC 2012
Number of pages8
StatePublished - Dec 1 2012
Event2012 IEEE Vehicular Networking Conference, VNC 2012 - Seoul, Korea, Republic of
Duration: Nov 14 2012Nov 16 2012

Publication series

NameIEEE Vehicular Networking Conference, VNC
ISSN (Print)2157-9857
ISSN (Electronic)2157-9865


Other2012 IEEE Vehicular Networking Conference, VNC 2012
Country/TerritoryKorea, Republic of


  • DSRC
  • EDCA
  • NS-2
  • QoS


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