TDSM: Trusted Dissemination Safety Messages in a Multi-hop V2V Communication

Broadcasting is a transmission of the same message to multiple recipients to form the communication process between wireless vehicular networks. Yet, many challenges still need to be addressed to ensure proper broadcasting. These include resolving the different security problems that affect the vehicular network efficiency while exchanging messages, and achieving low dissemination overhead and minimum broadcast delay while maintaining high delivery ratio. In this paper, we present a novel model for trusting the safety message before disseminating it, through multi-hop V2V communication. We also, ensured message high delivery rate with minimum time delay. To this end, we recommend the idea of dividing the digital roadmap of the interested area into small fixed size segments. To transmit the packets between vehicles, we depend on pairs of concatenated information composed of the beacon message and the safety message, where the sending time is arranged according to the road density. The model relies on the idea of using a forwarder to rebroadcast the safety message between segments. Choosing the best forwarder is thus based on a calculated weight value for links between the vehicles. Our contribution is achieved by adding two decentralized data trust stages: to entrust the safety message information in one-hop, and before disseminating it farther through multi-hop. The simulation results using NS2 and SUMO showed the effectiveness of the model. The two stages of the trust method are also verified.