Etc visible light wireless communication access method based on LED lights

Abstract

The invention discloses an ETC visible light wireless communication accessing method based on an LED vehicle lamp. The method includes the following steps that firstly, technological indexes of visible light communication and corresponding data unit frames in a physical layer are defined; secondly, the physical layer provides the service primitive which reads or sets the physical layer parameter function when the layer is accessed and the service original primitive is accessed to a data link layer; thirdly, an MAC sublayer in the data link layer carries out data transmission, data reception and data validation and an LLC sublayer in the data link layer carries out error detection and flow control; fourthly, an application layer responds to the service primitive of the data link layer and ETC visible light wireless communication based on the LED vehicle lamp between a vehicle-mounted device and a terminal system is finished. According to the ETC visible light wireless communication accessing method based on the LED vehicle lamp, the adaption problem between the LED vehicle lamp and an ETC communication protocol is solved, visible light emitted by the LED vehicle lamp can be directly used for carrying out short-distance wireless communication, visible light communication can be achieved when lighting is performed, an extra vehicle-mounted device is not needed, electromagnetic interference caused by radio frequency communication is avoided, and visible light communication can be achieved with low cost and low power consumption.

Description

technical field [0001] The invention relates to the technical field of visible light wireless communication and automatic vehicle identification, in particular to an ETC visible light wireless communication access method based on LED lights. Background technique [0002] ETC (ElectronicTollCollectionSystems, Electronic Toll Collection System) is an advanced toll collection method that countries all over the world are vigorously admiring. The owner only needs to install the electronic tag on the car window. When the vehicle passes the toll station, the reader set up at the toll station will read and write the electronic tag of the passing vehicle, and automatically read and write the electronic tag from the pre-bound radio frequency card or bank account. After deducting the corresponding fee, the car owner can quickly pass through the toll station without parking and manual payment, and truly realize a smooth road. [0003] LED car lights refer to car lights that use LEDs (l...

AI Technical Summary

Problems solved by technology

The mature application experience of the expressway electronic non-stop toll collection system is used for reference, but the front-end communication of the system adopts radio frequency mode, so the communication mode is not suitable for the communication mode of ETC based on LED lights

[0005] The Chinese patent application with the application number 201210042738.5 also mentions the community vehicle access system based on LED visible light communication, but the article mainly proposes that the access control facilities include displacement sensors, automatic barrier machines and vehicle-mounted facilities. The vehicle-mounted facilities include LED visible light transmitters that emit LED visible light signals. device, but did not specifically propose the use of LED transmitters and the communication system in the community vehicle access system

Images