Abstract
In this paper, a reliability enhanced and density adaptive data disseminating scheme is proposed for Vehicular Ad hoc NETworks (VANETs). The distributed on demand inquiring and responding mechanism is employed to get nodes’ connectivity information. The announcing-listening process is also designed to find the nodes with bigger additional degree to rebroadcast, by which the relaying node is selected freely from density’s influence. Simultaneously, a reliability parameter is designed to choose redundant relays for each hop. According to the importance of the broadcast, the parameter is set by the source node properly. Simulation results show that the scheme has achieved good performances such as low forwarding ratio, short latency and low load. The broadcast coverage ratio is ensured against the influence of key link errors and relaying nodes failure by paying suitable additional communication.
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