Multi-Level Trust Evaluation Models with Emergency Message Dissemination for Connected Vehicle Ad Hoc Networks

Vehicle Ad hoc Networks (VANETs) are the huge number of connected vehicles which captures maximum of the applications of intelligent transportation system (ITS). So it is very essential to improve the road level security and traffic management among the vehicles to achieve effective communication in it. To improve the network safety trust between the vehicles are enhanced. Currently VANETs perform high speed data transmission among the communication modules such as vehicle to vehicle and vehicle to road side unit (RSU). To provide effective trust among the vehicles in this research, Multi-Level Trust Evaluation Models with Emergency Message Dissemination (MLTE-EMD) is proposed. Here the trust calculation is performed in all the vehicles by measuring the parameters such as Detection of Trust (DT), Reference Trust (RT), Transmission Trust (TT) and Stability Trust (ST). Using these processes, the trustworthiness of the vehicles is highly increased during the process of communication among the vehicles and as well the data transmission with RSUs. The simulation of the proposed MLTE-EMD is carried out in network simulator (NS2) and the parameters which are considered for the process of comparative analysis are packet delivery ratio, computational delay, computational overhead and throughput where the outcome is compared with the recent approaches like SVC-HT and CATM-IV. From the output performance it is proven that the proposed MLTE-EMD perform comparatively better than the earlier researches in terms of packet delivery ratio and throughput.