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LED visible light communication ETC system

A visible light communication and visible light technology, applied in short-distance systems, ticketing equipment, instruments, etc., can solve the problems of occupying spectrum resources, electromagnetic interference, etc., and achieve low-power communication, avoid electromagnetic interference, and low-cost effects

Inactive Publication Date: 2017-07-28
中冶(北京)交通科技发展有限公司
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  • Claims
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AI Technical Summary

Problems solved by technology

The wireless communication method of the existing ETC system is mainly based on radio frequency communication. Radio frequency communication not only occupies a large amount of spectrum resources, but also needs to install additional receiving equipment such as on-board transmitting equipment and antennas, and also generates electromagnetic interference.

Method used

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  • LED visible light communication ETC system

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with various embodiments shown in the drawings. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0016] Such as figure 1 As shown, the communication schematic diagram of the present invention is described. Automotive LED headlights are mainly used as the emission source of the visible light signal of the entire ETC system, and the car LED headlights emit visible light with user information. The photodetectors installed on both sides of the toll station lane are mainly used as the visible light signal receiving end of the entire ETC system, responsible for converting the received visible light signal from the LED headlights of the car into an electrical signal, and then transmitting ...

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Abstract

The invention discloses an ETC (electronic toll collection) system utilizing visible light communication, which is an ETC system based on LED visible light communication. A vehicle unit uses LED visible light, and a roadside unit uses a DSRC protocol receiving unit, which can be compatible with an original ETC vehicle unit. A physical layer of the original ETC communication protocol DSRC is not suitable for visible light wireless communication, but a data link layer and an application layer are composed of data link layer and application layer protocols suitable for LED visible light wireless communication and are still suitable for the requirements of LED visible light wireless communication. Therefore, the ETC wireless communication access method of the invention based on the LED visible light realizes the physical layer specification definition of visible light communication in the ETC communication protocol, seamlessly accesses the data link layer and the application layer, and thus completes the access of the LED visible light and ETC wireless communication.

Description

technical field [0001] The invention relates to an LED visible light communication ETC system, in particular to a highway ETC charging system based on LED visible light communication. Background technique [0002] With the continuous growth of the world's population, the rapid development of the economy, and the continuous improvement of the industrialization process, the pace of development of the automobile industry has been accelerated, and there are more and more vehicles on the road. Collection, ETC) system, will inevitably produce traffic congestion, so that people spend a lot of time to wait in line, unable to improve the efficiency of the ETC system. In order to solve the above problems and improve the working efficiency of the ETC system, a lot of research work has been done on the wireless communication mode of the ETC system. The wireless communication method of the existing ETC system is mainly based on radio frequency communication. Radio frequency communicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07B15/06H04B10/116
CPCG07B15/063H04B10/116
Inventor 高岩
Owner 中冶(北京)交通科技发展有限公司
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