@article{3071328,
    title = "A disjoint frame topology-independent TDMA MAC policy for safety applications in vehicular networks",
    author = "Dragonas, V. and Oikonomou, K. and Giannakis, K. and Stavrakakis, I.",
    journal = "Ad Hoc Networks",
    year = "2018",
    volume = "79",
    pages = "43-52",
    publisher = "Elsevier B.V.",
    issn = "1570-8705",
    doi = "10.1016/j.adhoc.2018.06.006",
    keywords = "Medium access control;  Time delay;  Time division multiple access;  Topology, Direction of movements;  Medium access control (MAC);  Safety applications;  TDMA MAC protocols;  Topology-independent;  Vehicular communications;  Vehicular environments;  Vehicular networks, Vehicle to vehicle communications",
    abstract = "Medium access control (MAC) is a challenging problem in vehicular environments due to a constantly changing topology due to vehicle's mobility and stringent delay requirements, especially for safety-related applications (e.g., for vehicular-to-vehicular communication). Consequently, topology-independent TDMA MAC policies that guarantee a number of successful transmissions per frame independently of the underlying topology, can be regarded as a suitable choice for the particular vehicular environment. One such policy (TiMAC) is revisited and considered in this paper for a vehicular environment and is also extended to one that considers disjoint frames depending on the vehicle's direction of movement (d-TiMAC). Both TiMAC and d-TiMAC are evaluated against VeMAC – a well-established TDMA MAC protocol in the area of vehicular networks – based on simulations. It is observed that throughput under the considered TiMAC policy is close to that induced by VeMAC, whereas the number of retransmissions is reduced leading to a smaller time delay. Furthermore, the proposed d-TiMAC appears to achieve a higher throughput than VeMAC, and an even lower number of retransmissions (when compared to TiMAC), suggesting that d-TiMAC yields an even smaller time delay. Eventually, this observation is also supported when d-TiMAC is compared against TiMAC showing a further reduced number of retransmissions. © 2018 Elsevier B.V."
}