A fixed assignment based window access scheme for enhancing QoS of vehicular adhoc networks

In this paper, we propose a new MAC scheme for Vehicle-to-Infrastructure (V2I) communications that ensures fairness and reassignment of unused TDMA slots. The proposed TDMA based scheduling scheme allocates TDMA slots to the vehicles evenly and continuously monitors the network for unused slots. Our scheme ensures reassignments of unused slots by using “capture effect” and “time slot reassignment” mechanism. Simulation results show that the proposed scheme outperforms the conventional protocols in terms of successfully transmitted data packets, average delay and data loss ratio.

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