Literature Database Entry


J. Jeong, Y. Shen, S. Jeong, S. Lee, H. Jeong, T. Oh, T. Park, M. U. Ilyas, S. H. Son and D. H. C. Du, "STMAC: Spatio-Temporal Coordination-Based MAC Protocol for Driving Safety in Urban Vehicular Networks," IEEE Transactions on Intelligent Transportation Systems, vol. 19 (5), pp. 1520–1536, May 2018.


In this paper, we propose a spatio-temporal coordination-based media access control (STMAC) protocol for efficiently sharing driving safety information in urban vehicular networks. STMAC exploits a unique spatio-temporal feature characterized from a geometric relation among vehicles to form a line-of-collision graph, which shows the relationship among vehicles that may collide with each other. Based on this graph, we propose a contention-free channel access scheme to exchange safety messages simultaneously by employing directional antenna and transmission power control. Based on an urban road layout, we propose an optimized contention period schedule by considering the arrival rate of vehicles at an intersection in the communication range of a road-side unit to reduce vehicle registration time. Using theoretical analysis and extensive simulations, it is shown that STMAC outperforms legacy MAC protocols especially in a traffic congestion scenario. In the congestion case, STMAC can reduce the average superframe duration by 66.7%, packet end-to-end delay by 68.3%, and packet loss ratio by 88% in comparison with the existing MAC protocol for vehicle-to-infrastructure communication, based on the IEEE 802.11p.

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Original Version DOI (at publishers web site)
BibTeX BibTeX


J. Jeong
Y. Shen
S. Jeong
S. Lee
H. Jeong
T. Oh
T. Park
M. U. Ilyas
S. H. Son
D. H. C. Du

BibTeX reference

    author = {Jeong, J. and Shen, Y. and Jeong, S. and Lee, S. and Jeong, H. and Oh, T. and Park, T. and Ilyas, M. U. and Son, S. H. and Du, D. H. C.},
    doi = {10.1109/TITS.2017.2723946},
    issn = {1524-9050},
    journal = {IEEE Transactions on Intelligent Transportation Systems},
    month = {5},
    number = {5},
    pages = {1520--1536},
    publisher = {Institute of Electrical and Electronics Engineers},
    title = {{STMAC: Spatio-Temporal Coordination-Based MAC Protocol for Driving Safety in Urban Vehicular Networks}},
    volume = {19},
    year = {2018},

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