Study On Communication Scenario-oriented V2X Field Test Scheme

Reliability insurance of V2X(Vehicle-to-Everything)applications is a matter of life and death,V2 X equipment must undergo rigorous testing before large-scale commercialization.Field test,which is considered as an effective approach for connected vehicle testing,is widely accepted all over the world.Currently,existing field test schemes generally focus on protocol conformance,interoperability,and safety application functionality,with a few on V2 X communication performance.Moreover,comprehensive test cases are in need in the marketization progress.Thus,this thesis aims to propose a V2 X field test scheme,which considers both communication and application performance,while communication test scenarios are designed.The test scheme proposed in this thesis is based on a dense node array V2 X field test system,which is designed by our research team.According to the characteristics of this test system,a rapid configuration method for the V2 X field test system is designed,while corresponding communication scenarios,which considers various factors,such as vehicle density,vehicle mobility,weather,and roadside buildings,are analyzed to construct use case library.In the process,all impact factors are mapped to parameters of an integrated simulation channel model to generate configurations for test system control.To verify the rationality of the selection of influencing factors and the feasibility of the V2 X field communication scenario simulation method,field test procedures,which support both communication and application test,namely “joint test”,are designed in this thesis.V2 X communication tests are conducted and simulated with urban and highway scenarios.Moreover,three typical safety applications,which are forward collision warning(FCW),abnormal vehicle warning(AVW),and red-light warning(Red Light Violation Warning,RLVW),are tested as well.The communication field test results show that different influencing factors have different degrees of influence on V2 X communication;the error analysis between the field test results and the NS-3 simulation results(the average values of the error percentages of PDD and PDR are less than 4% and 2%,respectively)proves the feasibility of the communication scenario simulation method proposed;the joint test results show that both vehicle density and application implementation have an impact on the timeliness of V2 X application response.