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A Disjoint Frame Topology-Independent TDMA MAC Policy for Safety Applications in Vehicular Networks

Dragonas, Vasileios and Oikonomou, Konstantinos and Giannakis, Konstantinos and Stavrakakis, Ioannis (2018) A Disjoint Frame Topology-Independent TDMA MAC Policy for Safety Applications in Vehicular Networks. [Journal Articles] (Accepted for publication)

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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.

Item Type: Journal Articles
Uncontrolled Keywords: Vehicular networks; TDMA MAC; Topology-independent Safety Applications.
Subjects: UNSPECIFIED
Divisions: UNSPECIFIED
Depositing User: Rebeca De Miguel
Date Deposited: 16 Jul 2018 21:12
Last Modified: 16 Jul 2018 21:12
URI: http://eprints.networks.imdea.org/id/eprint/1863

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