Τίτλος:
A disjoint frame topology-independent TDMA MAC policy for safety applications in vehicular networks
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
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.
Συγγραφείς:
Dragonas, V.
Oikonomou, K.
Giannakis, K.
Stavrakakis, I.
Περιοδικό:
Ad Hoc Networks
Λέξεις-κλειδιά:
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
DOI:
10.1016/j.adhoc.2018.06.006
