Vehicle-road communication performance evaluation method and device
A vehicle-road communication and performance technology, applied in multiplex communication, time division multiplexing system, digital transmission system and other directions, can solve the problems of satellite signal occlusion and decrease in measurement accuracy, and achieve high measurement accuracy and improved accuracy. , the effect of accurate and reliable evaluation
Active Publication Date: 2021-12-21
交通运输部公路科学研究院
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Problems solved by technology
[0005] The problem solved by the present invention is that the existing vehicle-road communication performance evaluation method has the problem that the satellite signal is blocked and the measurement accuracy is reduced
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[0033] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0034] figure 1The schematic diagram of the vehicle-road communication performance evaluation scenario provided for this embodiment shows the roadside unit (RSU) and the vehicle-mounted unit (OBU). The RSU is provided with a PPS signal source (Pulse Per Second, pulse per second) and a roadside unit. The module is provided with an on-vehicle terminal module in the OBU. In this embodiment, the roadside module and the vehicle module are single-chip microcomputers including a high-speed internal oscillator clock source as an example for illustration. The function of sending and receiving mes...
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The present invention provides a vehicle-road communication performance evaluation method and device. The method includes: when the vehicle-mounted module receives the evaluation message sent by the roadside module, according to the real-time temperature clock frequency deviation dynamic calibration method, the first One counter is calibrated, and the analysis and forwarding time of the measurement and evaluation message is measured; the roadside module performs the second counter of the roadside module according to the dynamic calibration method of the real-time temperature clock frequency deviation and the Kalman filter dynamic estimation method based on the second pulse signal. Calibrate, and count the total amount of evaluation messages and the total evaluation time corresponding to the evaluation messages; determine the communication performance index according to the analysis forwarding time, total evaluation time, and total amount. The invention can realize accurate and reliable evaluation of the key performance indicators of the vehicle-road communication, uses a local clock signal without being affected by environmental occlusion, and has the characteristics of good environmental adaptability and high measurement accuracy.
Description
technical field [0001] The present invention relates to the technical field of intelligent driving test, in particular to a vehicle-road communication performance evaluation method and device. Background technique [0002] Autonomous driving technology has always been a hot topic in intelligent transportation systems. In view of the disadvantages of single-vehicle automatic driving that cannot meet the needs in terms of safety and reliability at this stage, the development of intelligent vehicle road systems allows "smart" roads to support some functions of automatic driving vehicles. It is an effective means to improve the safety and reliability of self-driving cars to realize the high degree of automation of cars through the cooperative operation between cars and roads. [0003] Vehicle-to-road communication is the key basic supporting technology in the intelligent vehicle-to-road system. It can be regarded as a pipeline connecting the road side unit (Road Side Unit, RSU) ...
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IPC IPC(8): H04L12/26H04J3/06H04L29/08
CPCH04L43/50H04L43/08H04L43/0852H04J3/0638H04L67/12
Inventor 岑晏青宋向辉李宏海李亚檬高剑卢立阳范青蓝赵佳海牛树云孙玲杨凤满
Owner 交通运输部公路科学研究院