ETC (electronic toll collection) communication control method, multi-beam antenna, RSU (road side unit) and ETC system

A multi-beam antenna and communication control technology, applied to instruments, ticketing equipment, etc., can solve problems such as car-following interference, communication failure, communication and vehicle charging reliability, etc., to achieve the effect of improving accuracy and preventing car-following interference

Active Publication Date: 2012-12-19
SHENZHEN GENVICT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, if the length of this area is small, the time for exchanging information between RSU and OBU is short, which may easily cause communication failure and affect the reliability of communication and vehicle charging; if the length of this area is too long, When there are many vehicles, there will be two or more vehicles interacting with the RSU at the same time in the communication area, which is prone to follow-up interference, sometimes resulting in communication errors or fee deductions errors

Method used

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  • ETC (electronic toll collection) communication control method, multi-beam antenna, RSU (road side unit) and ETC system
  • ETC (electronic toll collection) communication control method, multi-beam antenna, RSU (road side unit) and ETC system
  • ETC (electronic toll collection) communication control method, multi-beam antenna, RSU (road side unit) and ETC system

Examples

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Effect test

Embodiment 1

[0047] Such as figure 2 As shown, the ETC-based communication control method of an embodiment of the present application includes the following steps:

[0048] Step S101: a position detection step, that is, the RSU detects the position information of the vehicle. There are many ways to realize this step. For example, position sensors can be used for detection, that is, ground induction coils or other forms of position sensors are pre-installed at different positions in the lane. The position sensor thus obtains position information of the vehicle. The position information of the vehicle can be the specific position coordinates of the vehicle on the lane. For example, the position coordinates take the vertical projection position of the RSU on the lane as the coordinate origin, including the horizontal (perpendicular to the lane extension direction) coordinate values ​​and the longitudinal (consistent with the lane extension direction) ) coordinate value, or the position inf...

Embodiment 2

[0059] Please refer to Figure 17 The difference between this embodiment and Embodiment 1 is that the position detector in the RSU mainly includes the following components:

[0060]Positioning antenna, the positioning antenna is arranged in the RSU, an antenna array is formed by at least three receiving antennas 11 arranged on the same straight line, each receiving antenna 11 is used to receive microwave signals sent by the same OBU, and one receiving antenna 11 is used as an array For example, in this embodiment, there are N receiving antennas 11 (N is a natural number greater than 3), in order to improve the accuracy of positioning, the distance d between the equivalent phase centers of two adjacent receiving antennas 11 can be set to be equal , the distance d is preferably half of the wavelength λ of the microwave signal sent by the OBU. Those skilled in the art can understand that the arrangement of receiving antennas 11 on the same straight line means that the equivalent...

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Abstract

The invention discloses an ETC (electronic toll collection) communication control method, a multi-beam antenna, a RSU (road side unit) and an ETC system. The method comprises the following steps: a step of position detection and a step of communication area control, wherein in the step of position detection, the position information of an automobile is detected by the RSU; and in the step of communication area control, the communication areas of an antenna array on a lane is switched over by the RSU according to the detected position information of the automobile and referring to a corresponding relationship between preset automobile position information and the communication areas of the antenna array on the lane; wherein at least two communication areas are provided; different communication areas have different distances with the antenna array; the corresponding relationship is preset in the specific mode that the closer the automobile is apart from the RSU, the smaller the distance between the communication areas and the antenna array is. With the adoption of the method, the automobile interference phenomenon during the communication between the RSU and an OBU (on-board unit) can be avoided effectively, and the reliability and the accuracy in communication between the RSU and the OBU are improved.

Description

technical field [0001] This application relates to the field of intelligent transportation (ITS: Intelligent Transportation System), in particular to a communication control method based on electronic toll collection (ETC: Electronic Toll Collection), multi-beam antenna, road side unit (RSU: Road Side Unit) and ETC system. Background technique [0002] In the ETC system, during the process of information exchange between the RSU set on the lane and the on-board unit (OBU: On-board Units) installed on the vehicle through dedicated short-range communication technology (DSRC: Dedicated Short Range Communication), the RSU should only Communicate with a specific OBU within the lane area of ​​this RSU antenna to maintain the accuracy and reliability of communication and charging. [0003] In order to prevent the OBU in a vehicle on this lane from communicating with the RSU, the OBUs in other vehicles behind the vehicle are also located in the communication area of ​​the antenna i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07B15/06
Inventor 殷忠良徐根华
Owner SHENZHEN GENVICT TECH
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