Security Message Broadcast Mechanism Research in Vehicular Network

Abstract

Due to the rapid movement of the vehicle as a network node in the vehicle ad hoc network, the network topology changes frequently, and the communication link between the nodes is unstable, which leads directly to the fact that the security message cannot be transmitted in a timely and reliable manner. Based on these problems and practical requirements, this paper proposes a security message broadcast mechanism SMLP based on location prediction. The algorithm is divided into three steps. First, the future location information is predicted according to the location and direction of the neighbor node, and then the optimal relay node is selected. Finally, the relay node broadcasts the security message. In the stage of selecting the optimal relay node, the algorithm overcomes the shortcoming of the nearest neighbor node of the destination node as the next hop forwarding node, and further considers the continuous connection time between the nodes, direction coefficient and distance coefficient of node, and the stability coefficient is defined by the combination of these factors. SMLP chooses the neighbor node with the largest stability coefficient as the next hop relay node. The simulation results show that the SMLP routing protocol can reduce the packet loss rate and end-to-end delay in the packet transmission process to a certain extent compared with the GPSR routing protocol. It can be well applied to the transmission of security messages in the vehicle ad hoc network.

X. Fan, Ph.D. Prof., Main research interesting: Vehicular Networks, Mobile Internet, Delay tolerant networks.