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One of the greatest challenges in Vehicular Ad-hoc NETworks (VANET) is to establish stable routing. Due to the dynamic network this is a difficult problem. In this paper, the authors use trust-based routing. The node is chosen to be next-hop node until it reaches to trust threshold. To evaluate the node trust, they introduce the node' role trust, interaction printer trust, and recommendation trust. Moreover, the Analytic Hierarchy algorithm is used to coalesce various recommendation opinions from neighbor nodes. The simulation results show that the proposed approach improves VANET performance compared with GPSR (greedy perimeter stateless routing) and OLSR (optimized link-state routing).
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