Study On Nodes Deployment And Transmission Method Of Highway Traffic Parameters Acquisition Network

With the rapid development of the highway,the traffic flow of the highway increases sharply,traffic accidents and traffic congestion problem are becoming more and more serious.Reliable and accurate traffic parameters are important basis for real-time monitoring for highway traffic condition and efficient operation of highway.Sensor network,which is used in highway,provide informative and intelligent means in study on traffic parameters acquisition.There are two parts in the study on highway sensor network,which are traffic parameters perception layer and traffic parameters transmission layer.The work in perception layer is a study on scheme of sensor nodes deployment,which can help to obtain the most complete and reliable traffic parameters based on multi-game considering the deployment values and costs.The work in transmission layer is a study on traffic data transmission with the lowest energy consumption.There are two key steps of traffic parameters acquisition,which is from traffic parameters perception to traffic parameters transmission.The research object of this paper is highway sensor network oriented to traffic parameters acquisition,which is a study on the nodes deployment and data transmission of highway sensor network.The main achievements of this paper are illustrated in the following aspects:(1)The sensor nodes deployment method oriented to traffic parameters acquisition is studied.First of all,based on the characteristic of traffic parameters,the concept of traffic parameters perception degree is proposed,which can be used in quantitative analysis of the completeness of traffic parameters.Secondly,the concept of perception coverage degree of traffic parameters is proposed.Redundancy perception of traffic parameters is realized through the multiple sensing coverage of the ramp.Thirdly,a scheme of uniform deployment in child road is proposed by analyzing the influencing factors of sensor nodes deployment.The model of nodes deployment is built based on multi-game considering the deployment values and costs.And the method according to Simulated Annealing is gave to solve this problem.Finally,the feasibility and accuracy of node deployment model is proved combined with Jiangsu Province highway.(2)The data transmission method oriented to traffic parameters acquisition is studied.First of all,based on the demand of data transmission,the double-level network used to transmit traffic parameters in the highway is constructed,and the qualitative and quantitative analysis of the double-level network nodes are gave.Secondly,the concept of cluster-head index is proposed,and it is used for cluster-head selection mechanism of the double-level network.The non-uniform clustering routing algorithm based on cluster-head index is proposed to balance the energy consumption of network.Thirdly,the energy balance model is established to evaluate the transmission routing algorithm.And the method based on Genetic Particle Swarm is gave to solve this problem.Finally,a case study of Jiangsu Province highway is performed to prove that the data transmission method is effective in balancing energy consumption and extending life cycle of the network.