C-V2X mode 4 performance analysis considering noise and hidden terminals in high-load scenarios

doi:10.3969/j.issn.1674-8484.2024.06.016

Abstract

Abstract:

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.

Key words: cellular vehicle-to-everything (C-V2X) mode, double random signal-to-noise model, Cauchy distribution, packet delivery ratio (PDR)

CLC Number:

TN929.2

DOU Zufang, WANG Peng, YANG Qiaoli, YANG Xijuan. C-V2X mode 4 performance analysis considering noise and hidden terminals in high-load scenarios[J]. Journal of Automotive Safety and Energy, 2024, 15(6): 943-951.

Figures/Tables 9

References 21

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发射功率	20、23 dBm
车辆密度	0.1、0.2、0.3 辆 / m
信道带宽	10 MHz
数据传输率	10、20 Hz
单子帧子信道数	2、4
数据大小	190 bytes
感知功率阈值	-90.3 dBm

发射功率	20、23 dBm
车辆密度	0.1、0.2、0.3 辆 / m
信道带宽	10 MHz
数据传输率	10、20 Hz
单子帧子信道数	2、4
数据大小	190 bytes
感知功率阈值	-90.3 dBm