V2X Vehicle Alarm Information Spectrum Allocation Optimization Scheme And Development Of Vehicle Terminal With Vehicle Road Coordination System

As an important part of the intelligent transportation system,V2X(Vehicle to Everything)has received extensive attention in the academic and industrial circles in recent years.At present,there are two major standards in the field of V2 X communication in the world: LTE-V(Long Term Evolution – Vehicle),which has been proposed and rapidly developed in recent years,and DSRC(Dedicated Short Range Communications),which is widely used in developed countries such as Europe and the United States.The quality of communication based LTE-V is degraded in the shortage of spectrum resources,which is extremely disadvantageous for vehicle alarm information transmission involving vehicle driving safety.In addition,China’s V2 X application is relatively late,and there is currently no research on V2 X field application.In the V2 X application process,after receiving the surrounding road and vehicle information,the vehicle communication unit needs to convert it into relevant specific applications to realize the value of ensuring traffic safety and improving traffic efficiency.Based on the above two points,the main research contents and innovations of this paper are as follows:First,In the vehicle communication process based LTE-V,when the vehicle density is too high resulting in the spectrum resources are scarce,and the vehicle alarm information communication quality is degraded,a set of spectrum resource allocation optimization scheme is proposed.The BP neural network algorithm is innovatively used according to the vehicle driving state information.The vehicle priority is predicted,and a dedicated resource pool is reserved for the alarm information communication,and the transmission quality of the high priority alarm information is preferentially guaranteed.In the optimization scheme,first the vehicle priority level is predicted based on the vehicle driving state information,and then the vehicle priority level information is shared to the surrounding base stations,and the base station combines the vehicle priority level with the currently available spectrum resource information to reserve a dedicated vehicle warning information transmission on the road.The spectrum resources are used to ensure low-latency and high-reliability transmission of alarm information when a high-priority vehicle encounters an emergency to send vehicle alarm information.The simulation results show that in the scenario where the density of the vehicle is high and the spectrum resources are scarce,the scheme can effectively reduce the waiting delay of alarm information transmission and improve the success rate of alarm information transmission,thus ensuring traffic safety.Secondly,Aiming at the problem that the real-time and reliability of China’s V2 X terminal is not mature,based on the DSRC communication protocol,the message format in V2 X communication process is designed,and a set of V2 X vehicle terminal application software is developed.Then,DSRC communication equipment is provided,and the application software is verified in V2 X field system.The V2 X vehicle terminal application software is developed based on the MVC architecture and the observer mode.Through the parallel design of the program data flow and the control flow,the basic information of the road and the vehicle transmitted by the vehicle communication unit is utilized,it satisfies the white paper for intelligent application of the vehicle network.Under the premise of low latency and high reliability,the road warning,optimal speed guidance,anti-collision warning,and special vehicle priority pass are developed.Finally,the V2 X vehicle terminal application platform is used in the field detection application of the V2 X vehicle road coordination system based on DSRC communication.The above functions can accurately solve the problem and provide feedback to the driver in the form of graphical interface and voice prompts,and achieved a good experimental effect.Finally,this paper summarizes the above two parts of the research and puts forward the prospects for future research work.