摘要
作为车路协同功能实现的关键技术,V2X通信能够为驾驶员提供交通状态信息和危险预警信息,因此对V2X通信的及时性、准确性提出了较高要求。随着LTE-V2X相关标准的制定,以及基于LTE-V2X通信的路侧单元和车载单元产品的发展,现在亟需进行基于设备的实车测试,对相关产品和标准进行测试和验证。由此总结了车路协同路侧端所实现的功能,并进行了分类,其中包括12个交通诱导类功能、4个道路感知类功能。然后针对路侧单元和车载单元相关产品对这些功能进行实车测试,主要包括两方面测试内容:一是功能性测试,根据设计的功能,进行场地和设备部署,并对不同的行驶速度和预警距离,测试功能预警能否有效实现;二是通信性能测试,主要测试设备的通信延时和丢包率是否满足功能需求。经过测试,在不同的行驶速度和预警距离下,所设计的功能均能有效实现预警;PC5和Uu模式通信性能受通信距离和车速的影响不大,在有效的通信范围内,保持正常车速行驶,PC5模式能满足车路协同路侧端所涉及的功能需求,而Uu模式由于丢包率和通信延时性能均稍大,不能单独满足功能需要,只能与PC5模式同时使用以增大通信数据的准确性;在相同的速度和距离条件下,PC5模式相较于Uu模式有较低的通信延时和丢包率。
As the key technology of vehicle-road collaboration function,V2X communication can provide traffic drivers with traffic status information and danger warning information.Therefore,vehicle-road collaboration puts forward higher requirements for the timeliness and accuracy of V2X communication.With the formulation of LTE-V2X standards and the development of products such as roadside units and on-board units based on LTE-V2X communication,it is urgent to conduct equipment-based real vehicle testing,test and verify relevant products and standards.This paper summarizes and classifies the functions realized by the vehicle-road collaboration roadside unit,including 12 traffic guidance functions and 4 road perception functions.Then this paper conducts real vehicle test on these functions for the roadside unit and onboard unit related products,the test content mainly includes two aspects:one is functional test.According to the designed functions,the site and equipment are deployed,and test whether the warning function can be implemented under different driving speeds and warning distances;the other is the communication performance test,mainly test whether the communication delay and packet loss rate of device meet functional requirements.After testing,the communication performance of PC5 and Uu mode is not significantly affected by the communication distance and vehicle speed.Within the effective communication range,keep driving at a normal speed,and the PC5 mode can meet the functional requirements of the vehicle-road collaboration roadside unit while the Uu mode cannot meet the functional requirements alone due to the slightly large packet loss rate and communication delay performance,but it can be used simultaneously with PC5 mode to increase the accuracy of communication data.Under the same speed and distance conditions,PC5 mode has lower communication delay and packet loss rate than Uu mode.
作者
华国栋
李俊虎
王众
李宁
梁军
Hua Guodong;Li Junhu;Wang Zhong;Li Ning;Liang Jun(Jiangsu Smart Travel Future Automobile Research Institute Co.,Ltd,Nanjing 211111;Automobile Engineering Research Institute,Jiangsu University,Zhenjiang 212013)
出处
《汽车文摘》
2022年第8期24-30,共7页
Automotive Digest
基金
江苏省智能网联汽车产业创新联盟车联网开放研究课题(ORP-2021-004)。
作者简介
华国栋,出生于1975年,男,高级工程师,现就职于江苏智行未来汽车研究院,主要研究方向为电子信息工程。E-mail:freehgd@126.com;李俊虎,出生于1998年,男,见习工程师,现就职于江苏大学汽车工程研究院,主要研究方向为智能交通与智能车辆,E-mail:junhu5785@163.com;王众,出生于1993年,男,咨询规划部部长,现就职于江苏智行未来汽车研究院,主要研究方向为车路协同、车联网和自动驾驶。E-mail:wangzhong308@163.com;李宁,出生于1989年,男,研究中心主任,现就职于江苏智行未来汽车研究院,主要研究方向为车路协同、自动驾驶。E-mail:lining_essorg@126.com;梁军,出生于1976年,男,教授,特聘专家,现就职于江苏大学汽车工程研究院,主要研究方向为智能交通与智能车辆。E-mail:liangjun@ujs.edu.cn。
