Performance of car to car safety broadcast using cellular V2V and IEEE 802.11P

Jayashree Thota*, Nor Fadzilah Abdullah, Angela Doufexi, Simon Armour

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

7 Citations (Scopus)


Low delay, high reliability and fast exchange of safety broadcast messages are critical to future Intelligent Transport Systems (ITS) systems. This paper presents a cross layer analysis based on Raptor Q codes for transmitting emergency DENM (Decentralized Environmental Notification Message) messages with interference from other vehicles transmitting periodic CAM (Cooperative Awareness message) safety messages. The performance is compared for Cellular Vehicle to Vehicle (C-V2V) Communications and IEEE 802.11p technologies in a realistic highway environment. The end-to-end delay and Packet Reception Ratio (PRR) are used as the performance metrics to demonstrate the latency and reliability problems of standard repetition codes that are addressed using raptor Q codes. Coverage improvements of up to 240m is seen by using C-V2V with raptor Q codes for higher density of vehicles as compared to standard IEEE 802.11p/WAVE with repetition codes. IEEE 802.11p suffers from preamble channel estimation which effects the reliability.

Original languageEnglish
Title of host publication2018 IEEE 87th Vehicular Technology Conference (VTC Spring 2018)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages5
ISBN (Electronic)9781538663554
Publication statusE-pub ahead of print - 20 Jul 2018
Event87th IEEE Vehicular Technology Conference, VTC Spring 2018 - Porto, Portugal
Duration: 3 Jun 20186 Jun 2018


Conference87th IEEE Vehicular Technology Conference, VTC Spring 2018


  • C-V2V
  • connected vehicles
  • IEEE 802.11p
  • Raptor codes
  • reliable multicast
  • vehicular


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