C-V2X mode 4 performance analysis considering noise and hidden terminals in high-load scenarios
A data transmission analysis model,which took into account random noise,random shadow fading and hidden terminal,was proposed to further explore the data transmission performance of Cellular Vehicle-to-Everything(C-V2X)mode 4 in high-load scenarios.Firstly,a double random signal-to-noise ratio and signal-to-interference-to-noise ratio model was established,and the Cauchy distribution was used to solve the model.Secondly,the analytical formulas of four typical error probabilities in the process of data transmission were derived,and the coupling relationship between noise,shadow fading and data conflict was revealed.Thirdly,based on the four error types,the packet delivery ratio analytical model integrating noise,shadow fading and hidden terminal influence was further constructed.Finally,numerical simulations were used to analyze the key parameters affecting communication efficiency,and the influence of each parameter on packet delivery ratio was discussed.The results show that the packet delivery ratio(PDR)is reduced by 16.7%compared with the previous literature in the environment of high noise,high moving speed and high load,which verifies the adverse effects of random noise and hidden terminals on communication.
cellular vehicle-to-everything(C-V2X)modedouble random signal-to-noise modelCauchy distributionpacket delivery ratio(PDR)
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