Research On Expressway Multipath Recognition Key Technology

In recent years,the mileage of Hunan expressway has reach a huge development,and the traffic mileage was about 6450 kilometers,it’s the top three of whole country.The expressway structure become complicated,so it is unavoidable that it may cause some expressway loop network.For example,there may be two or more ways out the expressway between site A and B,which we called Ambiguous Path.To solve this problem,we are going to adapt the license plate recognition technology.At the present stage,the license plate recognition charging was a reasonable and reliable solution,because the cost is relatively low,the construction period is short,and the impact on the existing charge order is minimal.The success of license plate auto recognition techniques depends on two key technologies.First,improve the data transmission throughput between the toll station and the provincial identification center.Second,when it comes some image cannot be recognized,we should choose most possible three license images to the toll station staffs.In this paper,based on the multipath transmission technology,we study the existing multipath transmission technology and MPTCP protocol,analyzed the Hunan Expressway’s shortcoming using MPTCP protocol.We proposed a Transmission Prediction Scheduling Algorithm,fully consider the round trip time and the numbers of ACK,and give the detail description of the relative algorithm.Secondly,this paper compares the advantages and disadvantages of the routing algorithm principle.Based on the reference to part of the positive feedback principle of ant colony algorithm,we proposed User Evaluation Algorithm Model.When it comes to vehicle license could not recognize,based on the path and the speed of vehicle,we recommended three license plate images to the toll station staffs.Lastly,the current NS-3 simulator has no MPTCP module,this paper adds the MPTCP module into the NS-3,based on Google preserved.By modifying the MPTCP module,the simulation result shows that,comparing to the traditional MPTCP,the MPTCP with the TPSA algorithm could efficiently improve the bandwidth utilization and throughput of Hunan Expressway,which gain better dynamic adaptability.