A slotted and OFDM federated protocol for safety message broadcasting in VANETs

Abstract

MAC protocol design is an important task for safety message broadcasting in VANETs. Previous research works have solved many basic problems. They have a poor performance in the high dynamic and dense vehicle environment. This paper proposes a slotted and OFDM federated protocol in which the control channel of IEEE 1609.4 is divided into many sub-channels for all nodes in the network to avoid conflicts and improve packet delivery ratio. Simulation results show that the proposed protocol has a higher performance of packet delivery ratio.