ADD: A Data Dissemination Solution for Highly Dynamic Highway Environments

Vehicular Ad-Hoc Networks (VANETs) are a specific type of moving networks in which the nodes are vehicles with processing, storage and wireless communication capacity. VANETs face a number of challenges in terms of data dissemination due to the volatile density of vehicles and frequent changes in the network topology induced by the high mobility of the vehicles and of short-range communications. The envisaged applications, as well as some inherent characteristics of the VANETs render the data dissemination an essential service and a challenging task in these networks. Many data dissemination protocols have been proposed in the literature, nevertheless, most of such protocols do not deal simultaneously with the problems of broadcast storm and synchronization problem. To face such problems, we propose a new data dissemination protocol in vehicular networks named ADD, which operates in highly dynamic highway environments. The ADD consists two mechanisms, broadcast suppression and delay desynchronization. ADD uses a preference zone to eliminate the broadcast storm problem and the delay desynchronization to eliminate the synchronization problem caused by 802.11p protocol. When compared with three known solutions SRD, Flooding and AID we show that our proposal for data dissemination executes it with higher efficiency than other protocols, exceeding them in different scenarios in all the undertaken evaluations.