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

作　　者：代亮[1,2] 王宁 白浩男 宁耀军 孟芸 许宏科 DAI Liang;WANG Ning;BAI Haonan;NING Yaojun;MENG Yun;XU Hongke(School of Electronics and Control Engineering,Chang’an University,Xi’an 710064,China;The Joint Laboratory for Internet of Vehicles,Ministry of Education-China Mobile Communications Corporation,Chang’an University,Xi’an 710064,China;School of Automation,Xi’an University of Posts&Telecommunications,Xi’an 710121,China;Morningcore Holding Co.,Ltd.,Shanghai 201206,China)

机构地区：[1]长安大学电子与控制工程学院,西安710018 [2]长安大学车联网教育部-中国移动联合实验室,西安710018 [3]西安邮电大学自动化学院,西安710121 [4]宸芯科技股份有限公司,上海201206

出　　处：《电波科学学报》2024年第2期361-370,共10页Chinese Journal of Radio Science

基　　金：国家重点研发计划项目(2021YFB2601401);长安大学中央高校基本科研业务费专项资金(300102323201)。

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。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.

关 键 词：蜂窝车联网 侧行链路 信道测量 路径损耗模型 相关性分析 

分 类 号：TN98[电子电信—信息与通信工程]