代亮,王宁,白浩男,等. 蜂窝车联网侧行链路信道测量与分析[J]. 电波科学学报,2024,39(2):1-10. DOI: 10.12265/j.cjors.2023062
      引用本文: 代亮,王宁,白浩男,等. 蜂窝车联网侧行链路信道测量与分析[J]. 电波科学学报,2024,39(2):1-10. DOI: 10.12265/j.cjors.2023062
      DAI L, WANG N, BAI H N, et al. Cellular vehicle-to-everything sidelink channel measurement and analysis[J]. Chinese journal of radio science,2024,39(2):1-10. (in Chinese). DOI: 10.12265/j.cjors.2023062
      Citation: DAI L, WANG N, BAI H N, et al. Cellular vehicle-to-everything sidelink channel measurement and analysis[J]. Chinese journal of radio science,2024,39(2):1-10. (in Chinese). DOI: 10.12265/j.cjors.2023062

      蜂窝车联网侧行链路信道测量与分析

      Cellular vehicle-to-everything sidelink channel measurement and analysis

      • 摘要: 蜂窝车联网侧行链路接口(PC5)采用终端到终端直接通信的形式,因其通信延迟低、传输容量大和传输可靠性高的特点而具备广阔的科研和工程前景。为了实测蜂窝车联网侧行链路信道特性,使用具有PC5接口的车载板卡在城市道路进行了通信测量工作,并依据测量结果从信道特征对PC5接口信道进行了分析。分析了通信收包时延随距离和信噪比变化的特征,将实测参考信号接收功率值与自由空间和双射线两种路径损耗经验模型及对数距离和双斜率两种路径损耗拟合模型的预测值进行了对比,并引入了四种相关性分析算法,从数值偏移量、线性相关程度和几何形态相似度等角度分析了模型预测值与实测数据的关联性,最终验证了双斜率路径损耗模型最适合表征PC5接口通信信道在城市环境下的衰落特征,基于该模型测算得到的路径损耗指数和阴影衰落方差也进一步说明此模型能够更好地结合实验环境表征信道特性。

         

        Abstract: Cellular-vehicle-to-everything side link interface (PC5) adopts the form of device to device direct communication, which has the characteristics of low communication delay, large transmission capacity and high transmission reliability, and has broad scientific research and engineering prospects. In order to measure the characteristics of the side link channel of the cellular vehicle-to-everything, a vehicle-mounted board with PC5 interface is used for communication measurement on urban roads. Based on the measurement results, the communication channel of PC5 interface is analyzed from the channel characteristics. The characteristics of packet receiving delay varying with distance and signal-to-noise ratio are analyzed. The measured reference signal receiving power value is compared with the predicted values of the two path loss empirical models of free space and double ray and the two path loss fitting models of logarithmic distance and double slope. Four correlation analysis algorithms are introduced to analyze the correlation between the predicted value of the model and the measured data from the degree of linear correlation and the similarity of geometric morphology. It is verified that the dual-slope path loss model is most suitable for characterizing the fading characteristics of the PC5 interface channel in the urban environment. The path loss index and shadow fading variance calculated based on the model can better characterize the channel characteristics in combination with the experimental environment.

         

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