In order to evaluate the practical application effect of CVIS (Cooperative Vehicle Infrastructure System) information interaction and adapt to the development requirements of system security and reliability, the performance of CVIS information interaction based on broadcast Wi-Fi was tested. The packet loss rate and communication delay were selected as the test indicators of communication performance. Via constructing actual road traffic scenes divided into dynamic and static ones according to vehicle speed, and designing 4 detailed test schemes under different communication distance and line-of-sight conditions, the OBU (On-Board Unit) and RSU (Roadside Unit) were deployed in the closed test field to communicate with each other and the data was collected and processed to analyze the influence of distance, vehicle speed and line-of-sight on the communication performance of CVIS. The results showed that communication distance and line-of-sight were the most obvious influencing factors of packet loss rate, the farther the communication distance was, the worse the performance of CVIS information interaction was, and the higher the packet loss rate was; the packet loss rate under line-of-sight condition was lower than that under non line-of-sight condition, but the speed had no great influence on the packet loss rate; the speed, communication distance and line-of-sight had little influence on the communication delay. It can be seen that communication distance and line-of-sight are the important factors that lead to the degradation of communication performance of CVIS information interaction based on broadcast Wi-Fi. Therefore, CVIS should maintain information interaction within a certain communication range and line-of-sight conditions to ensure that the packet loss rate and communication delay of different kinds of message transmission reach the required value, so as to meet the application requirements on the actual road.
高茁苗，杨 琪，高 剑，邓蓉蓉
. Performance Test and Evaluation of Cooperative Vehicle Infrastructure System Information Interaction Based on Broadcast Wi-Fi in Closed Test Field[J]. Transport Research, 2021
, 7(2)
: 38
-46
.
DOI: 10.16503/j.cnki.2095-9931.2021.02.005
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