An Efficient Message Protocol Using Multichannel with Clustering

To deliver messages in the VANET (Vehicular Ad hoc Network) environment, vehicles are connected by wireless communications. The communications among vehicles is not stable by the vehicle speeds or the surrounding environments of roads. It is required to maintain stable communications between vehicles. In this paper, we modify the WAVE (Wireless Access in Vehicular Environments) communication standard and propose a method for fast emergency message delivery. The proposed method uses a multi-channel and clusters by considering communication capacity. The performance has been measured through simulations and compared with EMDOR (Emergency Message Dissemination with ACK-Overhearing based Retransmission). The proposed method reduces average message delay time and improves the reception ratio compared with EMDOR.