| In recent years,with the development of computer information technology,intelligent control technology,and communication technology,people have begun to apply Internet of Vehicle technology to the construction of automatic intersection systems.Automatic intersections interact with vehicles based on vehicle information and road condition information,and control vehicle travel in real time until the vehicle leaves the intersection.The automatic intersection management under the Io V technology has a significant effect on improving traffic conditions and improving the service efficiency of intersections.This paper studies Autonomous Intersection Management(Autonomous Intersection Management)under the Internet of Vehicles technology,and models Petri nets for vehicle driving scenarios and intersection control scenarios in the AIM system,and focuses on the message interaction behavior of vehicles and intersections A channel failure model is established,and a message retransmission model under random failure is proposed.The main research contents are as follows:1.Constructed AIM system vehicle driving scene,intersection control scene and AIM system CPN(Colored Petri Net)model,and analyzed the dynamic properties of the model to verify the correctness of the model.2.Based on the message interaction behavior in the above scenario,establish a channel failure model for vehicle and intersection message interaction,including failure occurrence and failure duration subnet models.Aiming at the delay and packet loss caused by channel failure,a message retransmission model is proposed,and a message retransmission CPN model is established.Through the performance analysis of the message retransmission model,it is concluded that the message delay of the retransmission message model is less than the channel failure model delay.3.Write the retransmission message model algorithm on the AIM simulation platform,and design four sets of experiments to evaluate the performance of the message retransmission model from the aspects of vehicle delay and completion time,number of vehicles completed,number of requests reserved,and packet loss rate For analysis.By comparing the simulation experiment results,the effectiveness of the message retransmission model is proved. |
