Research Of VANET Efficient And Reliable Routing Algorithm

Through between the vehicle and vehicle, communication between vehicle and roadside unit make traffic information sharing is an important part of intelligent transportation system,Including vehicle driving direction and speed of vehicles, road environment and the surrounding accident information.VANET is designed for the realization of communication between vehicle wireless self-organized network. However, VANET topology changes fast and make it faces challenges, which need to be solved is one of the key technologies of routing problem. Because traditional self-organizing network routing protocol is flawed, it does not apply to VANET, therefore, based on the research analyzed the classical principle of protocol, this thesis has presented an applicable to urban traffic scenarios, based on the geographic location of the routing protocol, the main contents are as follows:Part 1, in this thesis, based on the geographic location of the routing algorithm mainly includes two parts: the choice of the routing and packet forwarding. The part of routing has focused on figuring out how to be more efficient routing. Scheme has been put forward to considering the connectivity and physical length of road to choose routing through the transportation weight decided by the weight of vehicles on the road density and physical length. In addition, in the urban road junction base station and the number of cars have been deployed to collect information, then the calculation of traffic information service center statistics receive the information to calculate the routing path.Part 2, at the part of data forwarding, the thesis has focused on considering the stability of the link, which chose the node to maintain longer link time as the next jump. By comparing the synthetic and reverse selection of the next-hop node, forwarding scheme is designed,namely give priority to choose the speed of the direction of the vehicle as the next hop node.Part 3, finally, the performance analysis model is established, and obtained the calculation formula of the network throughput. Through the comparison of throughput, it can be seen that the proposed algorithm has better performance. At the same time, in this thesis,the simulation environment was studied.