A Novel MAC Scheme for Reliable Safety Messages Dissemination in Vehicular Networks

Muhammad Alam*, João Rufino, Kok Hoe Wong, Joaquim Ferreira

*Corresponding author for this work

Research output: Chapter in Book or Report/Conference proceedingConference Proceedingpeer-review


Safety messages dissemination in vehicular networks requires real-time and deterministic medium access. The existing standard, IEEE 802.11p, for vehicular networks is based on Carrier Sense Multiple Access (CSMA) which is not a deterministic mechanism as collision may occur to access the medium that can cause unbounded delays. Therefore, in this paper, we presented a new deterministic Medium Access Control (MAC) scheme for vehicular communications that ensure reliable safety messages dissemination in vehicular networks. In the proposed scheme, each Road Side Unit (RSU) and On-Board Units (OBU) is assigned a time slot in a fix medium access time (elementary cycle). Each RSU controls time access using the knowledge of the connected vehicles. Two realistic scenarios, Vehicle-to-Infrastructure (V2I)/Infrastructure-to-Vehicle (I2V) and Vehicle-to-Vehicle (V2V), are presented to test the proposed scheme. The proposed scheme is simulated and the presented results validate its effectiveness in terms of higher safety packets success rate and low communications delays.

Original languageEnglish
Title of host publicationHybrid Intelligent Systems - 18th International Conference on Hybrid Intelligent Systems HIS 2018
EditorsMaria Leonilde Varela, Ajith Abraham, Niketa Gandhi, Ana Maria Madureira
PublisherSpringer Verlag
Number of pages9
ISBN (Print)9783030143466
Publication statusPublished - 2020
Event18th International Conference on Hybrid Intelligent Systems, HIS 2018 - Porto, Portugal
Duration: 13 Dec 201815 Dec 2018

Publication series

NameAdvances in Intelligent Systems and Computing
ISSN (Print)2194-5357
ISSN (Electronic)2194-5365


Conference18th International Conference on Hybrid Intelligent Systems, HIS 2018


  • Gateways
  • Medium access control
  • Safety messages
  • Vehicular networks

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