Research On Routing Algorithm Of Vehicular Ad Hoc Network

Vehicular Ad-hoc Network(VANET)plays a very important role in today’s technologically advanced traffic management methods and constitutes the core of an Intelligent Transportation System(ITS).Due to the rapid mobility of nodes and the complexity of communication environment,routing technology has become the major challenges of VANET.Different from traditional routing,opportunistic routing takes advantage of the transmission opportunity brought by the mutual mobility of nodes to carry out data transmission,and has certain adaptability and flexibility,which well deals with many problems in VANET.The main work contents of this thesis are as follows:(1)According to the different influences of road characteristics in urban environment and traffic density and traffic Distribution on communication,an optimized Node Distribution Status Opportunistic Routing algorithm for VANET(NDSOR)was proposed.The algorithm was optimized from two aspects.At the crossroads selection stage,the competitive capital function was calculated.The direction of data transmission was determined by the competitive capital function,and the direction of data transmission was optimized.In the node selection stage,the selection of the relay node was determined by the node priority,and the selection of the next hop node was optimized.Simulation results show that compared with other related algorithms,NDSOR routing algorithm has better network performance.(2)For VANET tend to move the driver of the vehicle in the influence of social behavior and social relations and the effectiveness of the message transfer between different communities in VANET,puts forward an optimization opportunity Routing algorithm based on the social attribute for VANET(SAOR),the algorithm was mainly divided into two parts:through the community detection algorithm will be divided into multiple nodes;a community-based data transmission strategy suitable for VANET was formulated and node activity was taken as the main standard to measure the relay nodes,aiming at improving the network performance of inter-vehicle communication.Simulation results show that SAOR routing algorithm has better network performance than other routing algorithms.