RFID labeling-based highway emergency warning message (EWM) data packet identification and reception method

Abstract

The invention discloses a RFID labeling-based highway emergency warning message (EWM) data packet identification and reception method. The method comprises that 1, a RFID responder is installed at each inlet of a highway, wherein the responder comprises ID information of the highway and information related to mileage from the starting inlet of the highway to the responder and ID information data of parts of the same highway along different driving directions are different, 2, when a vehicle goes through an inlet of the road provided with the RFID responder, a reader installed in the vehicle reads highway ID information and mileage information in the responder, 3, a vehicle-mounted CPU effectively processes and records the acquired ID information and mileage information, accumulates the recorded mileage to the mileage computed at the intersection, and continuously updates the memory cell, and 4, through EWM information received by an OBU, according to preferential identification and comparison between the ID information and mileage information in the EWM data packet, the vehicle determines a relative position relationship with a vehicle in an accident and then determines if the EWM information needs to be read or transmitted.

Description

Technical field: [0001] The present invention relates to the wireless communication technology of highway accident vehicles in VII environment Background technique [0002] In the process of achieving zero accident rate on highways and intelligent transportation without driver, vehicle collision avoidance warning system technology under VII (Vehicle infrastructure integration) environment plays a vital role. In the event of an accident, the EWM (emergency warning message) transmission method sent by the accident vehicle is to realize the effective reception of accident information by following the vehicle within a certain range, and analyze the data information through the on-board central processor, so as to take urgent and effective measures. The premise of safety measures (take safe deceleration distance, take safe deceleration, etc.). Therefore, in the environment of expressway VII, it is particularly important to correctly select the following vehicle to receive EWM to...

AI Technical Summary

Problems solved by technology

In the current research, regardless of the communication environment such as ad-hoc ad-hoc network and cellular mobile communication network, the effective EWM cannot be recognized by the vehicle in the opposite lane and the vehicle in front of the accident, so it is easy to receive EWM information non-selectively and affect its normal operation. driving

Especially in the process of short-range wireless transmission on highways, blindly collecting and forwarding invalid EWM information to other vehicles will easily cause information flooding, resulting in limited wireless network channel conditions that cannot bear too much redundant information, resulting in channel congestion and successful information transmission. The rate is low, resulting in an increase in the delay of EWM information transmission

Ultimately, the following vehicle cannot obtain EWM information and take measures in time, which affects the safety of the following vehicle

Images