CN118433690A

CN118433690A - Data transmission method and device for ETC transaction and electronic equipment

Info

Publication number: CN118433690A
Application number: CN202410852841.9A
Authority: CN
Inventors: 黄可可; 潘一威; 叶金刚; 张军龙; 程海波
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2024-06-27
Filing date: 2024-06-27
Publication date: 2024-08-02
Anticipated expiration: 2044-06-27
Also published as: CN118433690B

Abstract

The embodiment of the application provides a data transmission method and device for ETC transaction and electronic equipment, and relates to the technical field of intelligent transportation; the data transmission method for the ETC transaction comprises the following steps: and responding to the fact that the vehicle exists on the ETC lane, continuously sending a channel negotiation request, receiving negotiation result information continuously returned by at least one vehicle-mounted unit (OBU), judging that the negotiation channel is successful if a plurality of negotiation result information in the negotiation result meets a preset auxiliary condition is detected, responding to the fact that the negotiation channel is successful with the OBU of the target vehicle on the ETC lane, taking the first channel as a working channel of a target antenna, sending a data request to the OBU of the target vehicle, if ETC transaction data returned by the OBU of the target vehicle is detected to be not received for more than a preset time, switching the working channel of the target antenna from the first channel to the second channel, and retransmitting the data request to the OBU of the target vehicle so as to carry out ETC transaction. Therefore, the ETC transaction efficiency can be improved through the scheme.

Description

Data transmission method and device for ETC transaction and electronic equipment

Technical Field

The present application relates to the field of intelligent traffic technologies, and in particular, to a data transmission method and apparatus for ETC transaction, and an electronic device.

Background

ETC (Electronic Toll Collection ) is an extremely important part in intelligent transportation, and is mainly suitable for highways, ETC lanes are specially arranged On the highways, RSUs (Road Side units) are arranged On each ETC lane, and vehicle owners only need to install OBUs (On Board units) On front windshields of vehicles and pre-store fees, when the OBUs are close to the RSUs, data communication can be carried out between the RSUs and the OBUs through channels, so that ETC transactions are realized, and the vehicles can pass through quickly; the RSU can comprise an RSU antenna and an RSU controller, wherein the RSU antenna is used for sending and receiving data, and the RSU controller is used for processing data of ETC transaction and completing transaction flow; in addition, the national standard specifies that there are only two channels for RSU to communicate with OBU, channel 0 and channel 1, respectively.

However, the radio frequency communication coverage area of the RSU antenna between adjacent ETC lanes has an overlapping area, if vehicles need to perform ETC transactions on all 2 ETC lanes in the overlapping area, the mutual interference of data can occur, so that the time of the ETC transactions becomes long, the efficiency of the ETC transactions is low, and even the situation of transaction failure can occur.

Therefore, a data transmission method for ETC transaction is needed to improve the efficiency of ETC transaction.

Disclosure of Invention

The embodiment of the application aims to provide a data transmission method and device for ETC transaction and electronic equipment, so as to improve the efficiency of ETC transaction. The specific technical scheme is as follows:

In a first aspect, an embodiment of the present application provides a data transmission method for an ETC transaction, which is applied to a road side unit RSU, where the RSU is disposed in an electronic toll collection ETC lane, and the RSU has a target antenna; the method comprises the following steps:

Responding to the existence of a vehicle on the ETC lane, and continuously sending a channel negotiation request based on the target antenna; the channel negotiation request is used for negotiating with a receiver to use a first channel when data interaction is carried out, wherein the first channel is a preset channel utilized when the target antenna works;

Receiving negotiation result information continuously returned by at least one vehicle-mounted unit OBU; the negotiation result information continuously returned by any OBU is the result information which is fed back by the OBU after continuously receiving the channel negotiation request and represents successful negotiation;

Detecting whether a plurality of pieces of negotiation result information fed back by an OBU of the same vehicle of the ETC lane exist in the received negotiation result information, wherein the negotiation result information meets a preset auxiliary condition; the judging mode that the negotiation result information satisfies the preset auxiliary condition comprises the following steps: based on the information source positioning result of the microwave signals to which the plurality of negotiation result information belongs, recognizing that the same vehicle gradually approaches the RSU to which the target antenna belongs, and judging that the plurality of negotiation result information meets a preset auxiliary condition;

if so, judging that the OBU negotiation channel with the target vehicle on the ETC lane is successful; wherein the OBU of the target vehicle is an OBU of an issuer that is the information of the plurality of negotiation results;

In response to successful channel negotiation with an OBU of a target vehicle on the ETC lane, sending a data request for performing ETC transaction to the OBU of the target vehicle through the target antenna by taking a first channel as a working channel of the target antenna;

Detecting whether ETC transaction data returned by the OBU of the target vehicle is not received or not in a preset time; if yes, switching the working channel of the target antenna from the first channel to the second channel, retransmitting the data request to the OBU of the target vehicle through the target antenna, and carrying out ETC transaction after receiving the transaction data returned by the OBU of the target vehicle based on the data request;

the second channel is a preset channel used when the antenna on the adjacent ETC lane works.

In a second aspect, an embodiment of the present application provides a data transmission device for ETC transaction, applied to a road side unit RSU, where the RSU is disposed in an electronic toll collection ETC lane, and the RSU has a target antenna; the device comprises:

The continuous sending module is used for responding to the existence of the vehicle on the ETC lane and continuously sending a channel negotiation request based on the target antenna; the channel negotiation request is used for negotiating with a receiver to use a first channel when data interaction is carried out, wherein the first channel is a preset channel utilized when the target antenna works;

The receiving module is used for receiving negotiation result information continuously returned by at least one vehicle-mounted unit OBU; the negotiation result information continuously returned by any OBU is the result information which is fed back by the OBU after continuously receiving the channel negotiation request and represents successful negotiation;

The first detection module is used for detecting whether a plurality of pieces of negotiation result information fed back by the OBU of the same vehicle of the ETC lane exist in the received negotiation result information, and the negotiation result information meets a preset auxiliary condition; the judging mode that the negotiation result information satisfies the preset auxiliary condition comprises the following steps: based on the information source positioning result of the microwave signals to which the plurality of negotiation result information belongs, recognizing that the same vehicle gradually approaches the RSU to which the target antenna belongs, and judging that the plurality of negotiation result information meets a preset auxiliary condition;

The judging module is used for judging that the OBU negotiation channel with the target vehicle on the ETC lane is successful if the OBU negotiation channel exists; wherein the OBU of the target vehicle is an OBU of an issuer that is the information of the plurality of negotiation results;

The transmitting module is used for responding to success of channel negotiation with an OBU of a target vehicle on the ETC lane, taking a first channel as a working channel of a target antenna, and transmitting a data request for ETC transaction to the OBU of the target vehicle through the target antenna;

The second detection module is used for detecting whether ETC transaction data returned by the OBU of the target vehicle is not received for more than a preset time; a retransmission module, configured to switch, if yes, a working channel of the target antenna from the first channel to the second channel, and retransmit, through the target antenna, the data request to an OBU of the target vehicle, so as to perform an ETC transaction after receiving that the OBU of the target vehicle returns transaction data based on the data request;

In a third aspect, an embodiment of the present application provides an electronic device, including:

A memory for storing a computer program;

and the processor is used for realizing any data transmission method aiming at ETC transaction when executing the program stored in the memory.

In a fourth aspect, embodiments of the present application provide a computer readable storage medium having a computer program stored therein, which when executed by a processor, implements any of the above-described data transmission methods for ETC transactions.

In a fifth aspect, embodiments of the present application provide a computer program product comprising a computer program which, when executed by a processor, implements any of the above described data transmission methods for ETC transactions.

The embodiment of the application has the beneficial effects that:

According to the data transmission method for ETC transaction provided by the embodiment of the application, a channel negotiation request can be continuously sent based on a target antenna in response to the existence of a vehicle on an ETC lane, negotiation result information continuously returned by at least one vehicle-mounted unit OBU is received, whether a plurality of negotiation result information fed back by the OBU of the same vehicle on the ETC lane exist in the received negotiation result information is detected, if the plurality of negotiation result information meet the preset auxiliary condition, the success of the OBU negotiation channel with the target vehicle on the ETC lane is judged, the success of the OBU negotiation channel with the target vehicle on the ETC lane is responded, the first channel is used as a working channel of the target antenna, a data request for carrying out ETC transaction is sent to the OBU of the target vehicle through the target antenna, whether ETC transaction data returned by the OBU of the target vehicle is not received for a preset time is detected, if the received negotiation result information is the plurality of negotiation result information fed back by the OBU of the same vehicle on the ETC lane is detected, the working channel of the target antenna is switched from the first channel to the second channel, and the OBU data request of the target vehicle is sent again, so that the ETC transaction data is carried out after the data request based on the data request is received by the OBU of the target vehicle is received.

The method comprises the steps that based on a mode that a target antenna continuously sends out a channel negotiation request and a corresponding detection mode, after the fact that an OBU negotiation channel of a target vehicle on an ETC lane is successful is effectively judged, a first channel is used as a working channel of the target antenna, and a data request for ETC transaction is sent to the OBU of the target vehicle; and when the ETC transaction data returned by the OBU of the target vehicle is detected to be not received for more than the preset time, the OBU of the target vehicle can be considered to have interference generated by the second channel in the transmission process of the data request, so that the OBU of the target vehicle is changed into the second channel in consideration of the interference, and therefore, the RSU can directly switch a preset channel utilized when the target antenna works into the second channel and retransmit the data request based on the second channel, so that the OBU of the target vehicle can receive the data request, and ETC transaction is carried out. Thus, through the scheme, the condition that data are mutually interfered due to channel interference can be relieved, the time of ETC transaction is reduced, and the efficiency of ETC transaction is improved.

In addition, compared with the related art, the application reduces the data interference in the ETC transaction process without improving the performance of the RSU antenna, reduces the cost, and has better effect of improving the ETC transaction efficiency. And when the RSU receives the negotiation result information, detecting whether the negotiation result information fed back by the OBU of the same vehicle of the ETC lane exists or not, and the negotiation result information meets the preset auxiliary condition, and then, when the condition is detected to be met, sending the data request to the target vehicle, so that the data request to the traffic jam vehicle on the ETC lane can be avoided, the accuracy of identifying the target vehicle to be transacted is improved, and the efficiency of ETC transaction can be improved at the same time.

Of course, it is not necessary for any one product or method of practicing the application to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the application, and other embodiments may be obtained according to these drawings to those skilled in the art.

Fig. 1 is a plan view of an ETC toll station for expressways according to an embodiment of the present application;

Fig. 2 is a flow chart of a data transmission method for ETC transaction according to an embodiment of the present application;

fig. 3 is a flow chart of a method for identifying an RSU to which a target antenna belongs in a same vehicle gradually according to an embodiment of the present application;

FIG. 4 (a) is a timing diagram of data transmission for ETC transactions according to an embodiment of the present application;

FIG. 4 (b) is a timing diagram of another data transmission for ETC transactions according to an embodiment of the present application;

FIG. 4 (c) is a timing diagram of still another data transmission for ETC transactions according to an embodiment of the present application;

FIG. 5 is a timing diagram for an ETC transaction according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a data transmission device for ETC transaction according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by the person skilled in the art based on the present application are included in the scope of protection of the present application.

First, for better understanding of the present solution, the application scenario and the principle of generating data interference of the present application are briefly described below with reference to the accompanying drawings, as shown in fig. 1:

Fig. 1 is a plan view of an ETC toll station for a highway, where an ETC lane 1 and an ETC lane 2 are adjacent lanes, an RSU antenna 1 is provided in front of the ETC lane 1, an RSU antenna 2 is provided in front of the ETC lane 2, and toll booths are also provided on both sides of the ETC lane; and, the RSU antenna 1 and the RSU antenna 2 are generally disposed at a high position, so that signals can be broadcast and data communication can be performed between the RSU antenna 1 and the RSU antenna 2, and because the range of signals broadcast by the RSU antenna 1 and the RSU antenna 2 is fan-shaped, the coverage area of radio frequency communication has an overlapping area, that is, a shadow area, when the vehicle travels to the area, the OBU on the vehicle receives signals broadcast by the RSU antenna 1 and the RSU antenna 2, so that data interference can be generated; when data interference occurs, in order to complete a transaction, an RSU on an ETC lane generally needs to send a transaction request to a vehicle multiple times, which results in a long transaction duration and affects transaction efficiency.

The signals broadcast by the RSU antenna may be referred to as radio frequency signals or radio frequency data, which is not particularly limited in the present application. And, the RSU and the OBU may communicate using DSRC (DEDICATED SHORT RANGE COMMUNICATION ) technology. In addition, when the RSU performs data communication with the OBU for the first time, the RSU broadcasts BST (Beacon Service Table ) information, a channel can be designated when the BST information is transmitted, when the OBU receives the BST information issued by the RSU, the OBU can reply to VST (VEHICLE SERVICE Table ) information, after receiving the BST information, the OBU switches the channel used by the OBU to the corresponding channel, replies to the VST information, and can handshake with the RSU.

Of course, the present application is not limited to expressway scenes, and any ETC charging scene based on RSU and OBU can be applied to the present application, and the present application is not limited thereto.

And, for better understanding of the present solution, the following description will be given for simplicity of related art:

In the related art, most of the schemes for improving the performance of the RSU antenna are adopted, signals broadcast by the RSU antenna are fixed on the lane as far as possible, or a filtering mechanism for signal reception is added, signals transmitted by the RSU antenna of an adjacent ETC vehicle are filtered, so that interference of the adjacent ETC lane to data is weakened, but the schemes require hardware to be added, the cost of the hardware is increased, and the conditions of data interference cannot be avoided because the range of the signals broadcast by the RSU antenna is fan-shaped, so that the anti-interference effect is influenced, the time of the ETC transaction is prolonged, and the efficiency of the ETC transaction is low.

The following first describes a data transmission method for ETC transactions according to an embodiment of the present application.

The data transmission method for ETC transaction provided by the embodiment of the application can be applied to an RSU, the RSU can specifically comprise an RSU antenna and an RSU controller, and in specific application, the data transmission method for ETC transaction can specifically be applied to the RSU controller. The specific form of the RSU controller and the specific form of the RSU are not limited in the present application.

The data transmission method for ETC transaction is applied to a Road Side Unit (RSU), wherein the RSU is arranged on an ETC lane for electronic toll collection and is provided with a target antenna; the method comprises the following steps:

detecting whether ETC transaction data returned by the OBU of the target vehicle is not received or not in a preset time;

If yes, switching the working channel of the target antenna from the first channel to the second channel, retransmitting the data request to the OBU of the target vehicle through the target antenna, and carrying out ETC transaction after receiving the transaction data returned by the OBU of the target vehicle based on the data request;

The following describes a data transmission method for ETC transactions according to an embodiment of the present application with reference to the accompanying drawings.

As shown in fig. 2, the data transmission method for ETC transaction provided by the embodiment of the application is applied to a road side unit RSU, wherein the RSU is arranged in an electronic toll collection ETC lane, and the RSU is provided with a target antenna; the method may comprise the steps of:

S201, responding to the existence of a vehicle on the ETC lane, and continuously sending a channel negotiation request based on the target antenna;

The channel negotiation request is used for negotiating with a receiver to use a first channel when data interaction is carried out, wherein the first channel is a preset channel utilized when the target antenna works;

The ETC lane can be any lane provided with an RSU, and the ETC lane is provided with adjacent ETC lanes; and, the target antenna may also be referred to as a target RSU antenna, and is mainly used for transmitting and receiving data, which is not specifically limited in the present application; in addition, the channel negotiation request is used for performing data interaction with the OBU that receives the channel negotiation request, where the first channel is a channel preset when the target antenna works, and the first channel may be any channel specified by a national standard, and by way of example, only two channels, namely, channel 0 and channel 1, of the RSU and the OBU are specified by the national standard, and then the first channel may be channel 0 or channel 1, which is not limited in particular by the present application. For convenience of description, the above-described RSU for performing a data transmission method for ETC transactions provided by the present application will be hereinafter abbreviated as RSU, and an ETC lane in which the above-described RSU is disposed will be hereinafter abbreviated as ETC lane.

It will be appreciated that there are a variety of ways in which the RSU may detect whether a vehicle is present on the ETC lane. For example, in one way, it is determined that a vehicle is present on the ETC lane when an image about the vehicle is acquired by means of the acquisition device; the vehicle existing on the ETC vehicle can be sensed by any sensing module on the lane, and the sensing module can be an infrared sensing module and the like by way of example; the present application is not limited to this, and the OBU of the vehicle on the ETC lane may automatically send information when approaching the RSU, so that the RSU may determine that the vehicle on the ETC lane is detected.

It is emphasized that the RSU may continuously issue a channel negotiation request in broadcast form based on the target antenna in response to the presence of a vehicle on the ETC lane, i.e., the channel negotiation request may be continuously received by the OBU of any vehicle within the signal coverage. In addition, since the channel negotiation request is not continuously transmitted to the OBU of a vehicle, when a certain vehicle is located in the signal coverage range of a plurality of RSU antennas, the OBU of the vehicle continuously receives a plurality of channel negotiation requests, and therefore, when the OBU of the vehicle does not return transaction data based on a data request, the OBU of the vehicle determines a channel characterized by the channel negotiation request as an operating channel in response to the channel negotiation request received later in time.

S202, receiving negotiation result information continuously returned by at least one vehicle-mounted unit OBU;

the negotiation result information continuously returned by any OBU is the result information which is fed back by the OBU after continuously receiving the channel negotiation request and represents successful negotiation;

It may be understood that the RSU may receive a plurality of negotiation result information continuously returned by the OBU, the number of the received negotiation result information is also a plurality of, and the number of the received negotiation result information is also a plurality of, which is not particularly limited in the embodiment of the present application.

It is emphasized that when the negotiation result information continuously returned by the plurality of OBUs is received, the negotiation result information continuously returned by the plurality of OBUs includes negotiation result information continuously returned by the OBUs of the target vehicle; and, since the RSU continuously sends out the channel negotiation request in the form of broadcasting, each OBU continuously receiving the channel negotiation request responds to the channel negotiation request, determines the channel represented by the channel negotiation request as a working channel, and continuously returns negotiation result information to the RSU, where the negotiation result information continuously returned by any OBU is: the OBU continuously receives the result information which is fed back after the channel negotiation request and represents the successful negotiation.

S203, detecting whether a plurality of pieces of negotiation result information fed back by the OBU of the same vehicle of the ETC lane exist in the received negotiation result information, wherein the negotiation result information meets a preset auxiliary condition;

the judging mode that the negotiation result information satisfies the preset auxiliary condition comprises the following steps: based on the information source positioning result of the microwave signals to which the plurality of negotiation result information belongs, recognizing that the same vehicle gradually approaches the RSU to which the target antenna belongs, and judging that the plurality of negotiation result information meets a preset auxiliary condition;

It is to be understood that, in the received negotiation result information, there may be a plurality of negotiation result information fed back by the OBU of the same vehicle of the ETC lane, and the plurality of negotiation result information may or may not satisfy the predetermined auxiliary condition, which is not particularly limited in the present application.

It should be emphasized that, when it is recognized that the same vehicle is traveling on the ETC lane and gradually approaches the RSU to which the target antenna belongs based on the source positioning results of the microwave signals to which the plurality of negotiation result information belongs, at this time, it may be determined that the plurality of negotiation result information satisfies the predetermined auxiliary condition, and then step S204 may be executed; then, when the vehicle on the ETC lane is in the traffic jam state, the plurality of pieces of negotiation result information fed back by the OBU of the vehicle do not satisfy the predetermined assist condition, so step S204 cannot be executed subsequently either.

And detecting whether a plurality of negotiation result information fed back by the OBU of the same vehicle of the ETC lane exists in the received negotiation result information, wherein a plurality of implementation manners of the plurality of negotiation result information meeting the predetermined auxiliary condition are various, and for the sake of layout clarity, an implementation manner will be described in other embodiments, and will not be repeated here.

S204, if the vehicle is in the ETC lane, judging that the OBU negotiation channel with the target vehicle on the ETC lane is successful;

Wherein the OBU of the target vehicle is an OBU of an issuer that is the information of the plurality of negotiation results;

It can be understood that if there are multiple pieces of negotiation result information fed back by the OBU of the same vehicle in the ETC lane and the multiple pieces of negotiation result information meet the predetermined auxiliary condition, it indicates that the OBU of the target vehicle has responded to the channel negotiation request sent by the target antenna, determines the channel represented by the channel negotiation request as a working channel, and returns the negotiation result information to the RSU, where it can be directly determined that the channel negotiation with the OBU of the target vehicle in the ETC lane is successful; and the vehicle may be regarded as a target vehicle, and the OBU of the target vehicle is the OBU of the sender that is the plurality of negotiation result information.

In another implementation, there may be multiple negotiation result information that is detected and received, where there is no feedback from the OBU of the same vehicle in the ETC lane, where it may be that the OBU of the target vehicle is damaged and cannot perform data communication, which is, of course, merely an exemplary description, and the present application is not particularly limited.

S205, in response to successful channel negotiation with the OBU of the target vehicle on the ETC lane, sending a data request for ETC transaction to the OBU of the target vehicle through the target antenna by taking the first channel as a working channel of the target antenna;

it may be understood that, the channel that the RSU negotiates with the OBU of the target vehicle and that is utilized by the target antenna during operation is the first channel, after the RSU responds to successful negotiation of the channel with the OBU of the target vehicle, the RSU and the OBU of the target vehicle may perform data interaction through the first channel, where the RSU may determine the operating channel of the target antenna as the first channel, and send, through the target antenna, a data request for performing the ETC transaction to the OBU of the target vehicle, that is, may request data from the OBU of the target vehicle. Illustratively, RSU1 may send a data request to OBU1 for performing an ETC transaction via a target antenna in response to successful channel negotiation with OBU1 of a target vehicle on the ETC lane, with channel 0 as the operating channel of the target antenna.

In addition, when the RSU sends a data request for performing the ETC transaction to the OBU of the target vehicle through the target antenna, the OBU of the target vehicle may be determined based on a Mac (MEDIA ACCESS Control Address) Address of the OBU of the target vehicle, or may be determined in other manners, which is not specifically limited in the embodiment of the present application.

S206, detecting whether ETC transaction data returned by the OBU of the target vehicle is not received for more than a preset time, if yes, executing step S207;

it will be appreciated that the RSU may detect whether ETC transaction data returned by the OBU of the target vehicle is not received for more than a predetermined time in the process of sending the data request, and since the present application adopts a manner that adjacent ETC lanes adopt different channels, the preset channels used when the antennas on the adjacent ETC lanes operate are different channels, that is, the first channel and the second channel are different channels, and if the first channel is channel 0, the second channel is channel 1.

And if the ETC transaction data returned by the OBU of the target vehicle is not received for more than a predetermined time, it may be considered that the second channel used when the antenna on the adjacent ETC lane is operated generates interference, the interference generated by the second channel may cause the operation channel of the OBU of the target vehicle to be changed from the first channel to the second channel, and the cause of the interference may be: after the RSU successfully negotiates a channel with the OBU of the target vehicle on the ETC lane, when a data request is not sent to the OBU of the target vehicle, the adjacent ETC lane is driven to a vehicle, and as the channels used by the antennas of the two ETC lanes are different, other RSUs arranged on the adjacent ETC lanes can send a channel negotiation request to the OBU of the vehicle on the lane, the channel negotiation request is used for negotiating that a second channel is used when data interaction is performed, and the OBU of the target vehicle is located at a position capable of receiving the channel negotiation request, so that the OBU of the target vehicle can respond to the channel negotiation request and change the working channel of the OBU into the second channel, and the RSU can detect that the working channel of the OBU of the target vehicle is changed into the second channel, thereby determining that interference generated by the second channel exists in the transmission process of the data request. Of course, the reason why the interference is generated is described above as an exemplary description, and the present application is not particularly limited.

It should be emphasized that, since the operating channel of the OBU of the target vehicle is changed to the second channel and the preset channel utilized when the target antenna operates is the first channel, the two channels are different, so that the OBU and the RSU of the target vehicle cannot communicate data through the target antenna, and obviously, the RSU cannot receive the ETC transaction data returned by the OBU of the target vehicle.

And because the communication time between the OBU and the RSU of the target vehicle is extremely short, the preset time is also extremely short, and the ETC transaction data returned by the OBU of the target vehicle is not received beyond the preset time, so that the interference generated by the second channel in the transmission process of the data request can be judged. For example, the predetermined time may be set to 20ms, and the rsu may detect whether ETC transaction data returned by the OBU of the target vehicle is not received more than 20 ms.

And S207, switching the working channel of the target antenna from the first channel to the second channel, retransmitting the data request to the OBU of the target vehicle through the target antenna, and carrying out ETC transaction after receiving the data request returned by the OBU of the target vehicle based on the data request.

It will be appreciated that if it is detected that no ETC transaction data returned by the OBU of the target vehicle has been received for more than a predetermined time, it may be considered that there is interference generated by the second channel in the transmission of the data request. By way of example, if the RSU detects that no ETC transaction data returned by the OBU of the target vehicle is received for more than 20ms, it may determine that there is interference generated by the second channel during the transmission of the data request.

And if it is detected that ETC transaction data returned by the OBU of the target vehicle is not received for more than a preset time, the working channel of the OBU of the target vehicle is changed into a second channel, the working channel of the target antenna can be switched from the first channel to the second channel, and at the moment, the working channel of the OBU of the target vehicle and the working channel of the target antenna are both the second channel and can perform data communication, so that the RSU can retransmit a data request to the OBU of the target vehicle through the target antenna, the OBU of the target vehicle can return transaction data to the RSU in response to the received data request, and the RSU can directly perform ETC transaction after receiving the transaction data returned by the OBU of the target vehicle; the ETC transaction may include deduction, rechecking, and other processes, and specific processes may be described in the following embodiments, which are not repeated herein.

It should be emphasized that after the OBU of the target vehicle receives the data request, the OBU of the target vehicle is no longer interfered by the second channel, that is, the interference generated by the second channel is only during and before the transmission process of the data request.

Optionally, in another embodiment, the method for identifying the RSU to which the same vehicle gradually approaches the target antenna according to the source positioning result of the microwave signal to which the plurality of negotiation result information belongs in the present application, as shown in fig. 3, may include S301 to S303:

s301, calculating the distance between a position point represented by a source positioning result of a microwave signal to which the negotiation result information belongs and the RSU according to each negotiation result information in the plurality of negotiation results to obtain a distance corresponding to the negotiation result information;

It can be understood that, for a plurality of negotiation result information continuously returned by the OBU of the same vehicle, the distance between the location point represented by the source location result of the microwave signal to which each negotiation result information belongs and the RSU can be calculated, and the distance between the OBU sending each negotiation result information and the RSU can be calculated, so as to obtain the distance corresponding to the negotiation result information.

It can be appreciated that there are various methods for determining the source location result, and for the sake of layout clarity, description will be given in the following embodiments, and details will not be repeated.

S302, sorting the distances corresponding to the calculated negotiation result information according to the order of the sending time of the negotiation result information from the early to the late to obtain a sorting sequence;

It may be appreciated that the distances corresponding to the calculated negotiation result information may be ordered according to the order of the sending time of the negotiation result information from early to late, or may be ordered according to other orders, for example: the present application is not particularly limited in that the plurality of negotiation result information is ordered in the order of the time of issuance from late to early. Illustratively, the sending time of the negotiation result information 1 is 10 points 15 minutes 10 seconds, the sending time of the negotiation result information 2 is 10 points 15 minutes 9 seconds, and the sending time of the negotiation result information 3 is 10 points 15 minutes 11 seconds, so that the ordered sequence negotiation result information 2-negotiation result information 1-negotiation result information 3 can be obtained according to the ordering from the sending time to the late.

And S303, if the sorting sequence is a descending sequence of the distance, recognizing that the same vehicle gradually approaches the RSU to which the target antenna belongs.

It can be understood that after the sorting sequence is obtained, if the sorting sequence is a descending sequence with respect to distance, that is, the sorting sequence sorts the sending times of the plurality of pieces of negotiation result information from early to late, and also satisfies descending sorting of distances corresponding to the pieces of negotiation result information from big to small, then the earlier the sending time of the negotiation result information is, the greater the distance corresponding to the negotiation result information is, the later the sending time of the negotiation result information is, the smaller the distance corresponding to the negotiation result information is, and the distance RSU representing the target vehicle is closer and closer, at this time, the same vehicle can be identified to be gradually approaching the RSU to which the target antenna belongs. The sequencing sequence is exemplified by negotiation result information 2-negotiation result information 1-negotiation result information 3, the distance corresponding to the negotiation result information 1 is 10m, the distance corresponding to the negotiation result information 2 is 12m, the distance corresponding to the negotiation result information 3 is 8m, the sequencing sequence is a descending sequence, and it can be identified that the vehicle sending each negotiation result information is gradually close to the RSU to which the target antenna belongs.

Therefore, the method and the device can obtain the ordering sequence by ordering the distances corresponding to the negotiation result information, and identify the RSU to which the same vehicle gradually approaches the target antenna when the ordering sequence is the descending sequence of the distances, and send the data request to the target vehicle after identifying the RSU to which the same vehicle gradually approaches the target antenna, so that the data request can be prevented from being sent to the traffic jam vehicles on the ETC lane, the identification accuracy of the target vehicle to be transacted is improved, and the ETC transaction efficiency is improved.

Optionally, in another embodiment, the identifying manner of whether any negotiation result information is information fed back by an OBU of a vehicle on the ETC lane includes: mode A1;

The method A1 is used for identifying whether the negotiation result information meets a preset screening condition, if so, identifying that the negotiation result information is fed back by an OBU of a vehicle on the ETC lane;

The predetermined screening conditions include: the corresponding signal strength exceeds a preset threshold value, or the information source positioning result of the microwave signal represents that the information source of the microwave signal is positioned in the ETC lane area; the signal intensity corresponding to any negotiation result information is the signal intensity of the microwave signal which is received by the target antenna and carries the negotiation result information; the information source positioning result is determined by adopting a Digital Beam Forming (DBF) technology aiming at the target antenna;

The predetermined threshold may be an empirical value, which characterizes the lowest signal strength of the negotiation result information sent by the OBU of the vehicle on the ETC lane to the RSU on the ETC lane, and the signal strength corresponding to the negotiation result information returned by the OBU of the target vehicle is highest because the signal strength corresponding to the negotiation result information sent by the OBU closer to the ETC lane is higher, and the OBU of the target vehicle may be the OBU closest to the RSU.

It can be understood that, when receiving multiple pieces of negotiation result information, the target antenna may receive multiple microwave signals carrying the negotiation result information, where multiple microwave signals are sent by multiple OBUs, or may be continuously sent by an OBU, and the RSU may directly detect the signal strength of each piece of negotiation result information based on the microwave signals received by the target antenna, and when the signal strength corresponding to the received negotiation result exceeds a predetermined threshold, may consider that the negotiation result information meets a predetermined screening condition.

It should be emphasized that, by the signal strength corresponding to the negotiation result information, it is determined whether there is negotiation result information fed back by the OBU of the target vehicle, and in actual use, there may be an error, so the present application also provides another method for detecting whether there is negotiation result information meeting the predetermined screening condition.

It can be understood that the predetermined screening condition further includes that the source location result of the belonging microwave signal characterizes that the source of the microwave signal is located in the ETC lane region, where the source location result is a result of locating the source of any microwave signal, and the source location result is determined by adopting a DBF (Digital Beam Forming ) technology for the target antenna; of course, since the target antenna may receive the microwave signals to which the plurality of negotiation result information belongs, the source positioning result of each microwave signal may be characterized as being located in the ETC lane area, or may be located in other areas, for example: is located within an adjacent ETC lane region.

It can be understood that, for each microwave signal carrying negotiation result information, the DBF technology can be used to perform source location, the DBF technology can use the microwave signal collected by the target antenna, and then estimate the direction of arrival of the microwave signal according to the phase difference from the incident direction of the microwave signal to each array element of the target antenna, so as to determine the source location result of the microwave signal. Then, when the source location result of the microwave signal characterizes that the source of the microwave signal is located in the ETC lane area, the negotiation result information is recognized to be in accordance with the preset screening condition.

Of course, the above two cases of negotiation result information meeting the predetermined screening condition are merely exemplary, and the embodiment of the present application is not limited thereto.

It can be understood that if the signal strength corresponding to the negotiation result information exceeds a predetermined threshold, it can be determined that the negotiation result information satisfies a predetermined screening condition; if the information source positioning result of the microwave signal to which the negotiation result information belongs represents that the information source of the microwave signal is positioned in the ETC lane area, the negotiation result information can be judged to meet the preset screening condition.

For example, the predetermined threshold is-10 dbm, the rsu receives negotiation result information returned by 3 OBUs, where the signal strength corresponding to the negotiation result information returned by the OBU1 is-12 dbm, the signal strength corresponding to the negotiation result information returned by the OBU2 is-8 dbm, and the signal strength corresponding to the negotiation result information returned by the OBU3 is-15 dBm, at this time, it may be determined that the signal strength corresponding to the negotiation result information returned by the OBU2 exceeds the predetermined threshold, and it is determined that the negotiation result returned by the OBU2 meets the predetermined screening condition.

It can be seen that, in the embodiment of the present application, whether any negotiation result is information fed back by an OBU of a vehicle on an ETC lane is determined by identifying whether the negotiation result information satisfies a predetermined screening condition, and when the negotiation result information is satisfied, the negotiation result information can be determined to be information fed back by an OBU of a vehicle on an ETC lane, and when a subsequent ETC transaction flow is performed, a situation that data interfere with each other due to channel interference can be alleviated, time of the ETC transaction is reduced, and efficiency of the ETC transaction is improved.

In one implementation, the negotiation result information returned by any OBU carries the Mac address of the OBU;

the identification mode of whether any two pieces of negotiation result information are information sent by the OBU of the same vehicle or not: it is identified whether the carried MAC addresses are identical.

It can be understood that, because the Mac address of each OBU is carried in the negotiation result information returned by each OBU, and the Mac addresses carried by the multiple negotiation result information continuously returned by the OBU of the same vehicle are the same, the Mac address carried in the negotiation result information can be obtained from the negotiation result information sent by the OBU of the vehicle; when the RSU subsequently sends a data request for performing an ETC transaction to the OBU of the vehicle, the Mac address may be carried in the data request, so that the Mac address is used as a target address to implement sending the data request to the OBU of the vehicle, instead of broadcasting the data request.

Therefore, the embodiment of the application can identify whether any two pieces of negotiation result information are information sent by the OBU of the same vehicle through the Mac address, and then send the data request for carrying out ETC transaction to the OBU of the vehicle without broadcasting through a target antenna, so that the condition that data are mutually interfered due to channel interference can be relieved, the time of ETC transaction is reduced, and the efficiency of ETC transaction is improved.

In one implementation, the predetermined time is determined based on a predetermined delay time and a processing time of the ETC transaction by the OBU of the target vehicle.

It will be appreciated that when it is detected that the ETC transaction data returned by the OBU of the target vehicle is not received beyond a predetermined time, it may be considered that there is interference generated by the second channel during transmission of the data request, and the predetermined time may be determined based on a predetermined delay time and a processing time of the OBU of the target vehicle for performing the ETC transaction, where the predetermined delay time and the processing time of the OBU of the target vehicle for performing the ETC transaction may be preset empirical values.

It will be appreciated that there may be a delay time in the transmission of the data request and ETC transaction data, so the predetermined delay time may be preset, and the processing time may also be present for the OBU of the target vehicle in performing the ETC transaction, so it may be preset. By way of example, the predetermined delay time is 20ms, the processing time of the ETC transaction by the OBU of the target vehicle is 30ms, and the predetermined time may be determined to be 50ms.

Therefore, the preset time in the embodiment of the application can be determined based on the preset delay time and the processing time of ETC transaction performed by the OBU of the target vehicle, so that when ETC transaction data returned by the OBU of the target vehicle is not received in excess of the preset time, the second channel is considered to generate interference in the transmission process of the data request, and the preset channel utilized in the working process of the target antenna is directly switched to the second channel, so that the condition of mutual interference of data caused by channel interference is relieved, the time of ETC transaction is reduced, and the efficiency of ETC transaction is improved.

For a better understanding, the principle of channel switching is briefly described below with reference to the accompanying drawings, as shown in fig. 4 (a), 4 (b) and 4 (c):

fig. 4 (a) shows a case where no interference is generated in other channels during transmission of a data request.

S401, sending a channel negotiation request, negotiating a channel 0;

It will be appreciated that RSU1 may send a channel negotiation request to the OBU such that the channel used for data communications is channel 0.

S402, returning negotiation result information, and successfully negotiating channel 0;

It can be understood that, in response to the channel negotiation request, the OBU may return negotiation result information to the RSU1, where the negotiation result information characterizes the result information that is fed back by the OBU after receiving the channel negotiation request and characterizes that the negotiation is successful, and at this time, the working channel of the OBU is channel 0.

S403, sending a data request;

It will be appreciated that RSU1 may send a data request to the OBU over channel 0 for requesting transaction data.

S404, returning transaction data;

it will be appreciated that the OBU may return transaction data directly through channel 0 in the absence of interference from other channels.

In the subsequent step, a subsequent ETC transaction step is performed per channel 0.

Figure 4 (b) is a case where there is interference generated by other channels during transmission for a data request,

S411, sending a channel negotiation request, negotiating channel 0;

It will be appreciated that the RSU1 may send a channel negotiation request to the OBU, so that the channel used for data communication between the two is channel 0, and the RSU1 is an RSU disposed in the ETC lane.

S412, returning negotiation result information, and successfully negotiating channel 0;

It can be understood that the OBU may return negotiation result information to the RSU1, where the negotiation result information characterizes the result information that is fed back by the OBU after receiving the channel negotiation request and characterizes that the negotiation is successful, and at this time, the working channel of the OBU is channel 0.

S413, sending a channel negotiation request to negotiate a channel 1;

it can be understood that RSU2 is another RSU disposed in the adjacent ETC lane, and RSU2 sends a channel negotiation request to the OBU later than RSU1, so that the channel used for data communication is channel 1.

S414, returning negotiation result information, and successfully negotiating the channel 1;

It can be understood that, in response to the channel negotiation request, the OBU may return negotiation result information to the RSU2, where the negotiation result information characterizes the result information that is fed back by the OBU after receiving the channel negotiation request and characterizes that the negotiation is successful, and at this time, the working channel of the OBU is channel 1.

S415, sending a data request;

it will be appreciated that the transmitted data request OBU cannot be received since the operating channel of the OBU is channel 1 and the operating channel of the antenna of RSU1 is channel 0.

Fig. 4 (c) is a case of performing channel switching using the data transmission method for ETC transaction in the present application,

S421, sending a channel negotiation request to negotiate a channel 0;

S422, returning negotiation result information, and successfully negotiating channel 0;

S423, sending a channel negotiation request to negotiate channel 1;

S424, returning negotiation result information, and successfully negotiating channel 1;

S425, switching to channel 1;

It will be appreciated that RSU1 directly switches the operating channel of the antenna from channel 0 to channel 1.

S426, sending a data request;

It will be appreciated that the RSU1 can send a data request directly, since the operating channel of the OBU is channel 1 and the operating channel of the antenna of the RSU1 is channel 1.

S427, returning transaction data;

It will be appreciated that the OBU may return transaction data directly over channel 1.

In the subsequent step, a subsequent ETC transaction step is performed per channel 1.

In addition, compared with the related art, the application reduces the data interference in the ETC transaction process without improving the performance of the RSU antenna, reduces the cost, and has better effect of improving the ETC transaction efficiency.

Alternatively, in another embodiment, as illustrated in fig. 5, the specific process of performing the ETC transaction may include:

S501, initializing configuration;

It will be appreciated that the RSU1 may be configured by initialization via a PC (Personal Computer ), the operating channels of the antenna of the RSU1 may be configured, etc., which the present application is not limited to in particular.

S502, configuring an antenna;

It will be appreciated that RSU1 configures the antenna in response to an initialization configuration instruction sent by the PC.

S503, returning a configuration result;

it will be appreciated that RSU1 may return the configuration results to the PC.

S504, switching on an RSU antenna;

it will be appreciated that the PC may send an instruction to the RSU1 to open the RSU antenna, i.e. to open the antenna.

S505, sending BST information;

It will be appreciated that RSU1, in response to an instruction to turn on the RSU antenna, turns on the RSU antenna and broadcasts BST information to the OBU. It will be appreciated that the transmitted BST information may carry a channel negotiation request, so as to perform channel negotiation with the OBU.

S506, VST information is sent;

it will be appreciated that the OBU transmits VST information to RSU1 in response to the received BST information, thereby enabling handshake communication with RSU 1. It is understood that the transmitted VST information may carry negotiation result information.

It can be understood that S501-S504 described above are preconfiguration procedures for RSUs; s505 to S506 described above may be the process of negotiating a channel as described above.

S507, acquiring vehicle information;

It will be appreciated that the RSU1 may send a data request to the OBU to obtain vehicle information; the vehicle information may be information such as a license plate number of the vehicle.

S508, returning vehicle information;

It will be appreciated that the OBU may return vehicle information to the RSU1 in response to a data request.

S509, reading the balance and deducting money;

It can be understood that the RSU1 may send a balance reading instruction and a deduction instruction to the IIC card (Inter-INTEGRATED CIRCUIT CARD ), and may read the balance of the IIC card and deduct money.

S510, returning the balance;

It will be appreciated that the IIC card may return a balance to the RSU 1.

S511, returning a result;

It will be appreciated that RSU1 may return the balance returned by the IIC card to the PC as a result.

S512, rechecking consumption;

It will be appreciated that the PC may request review consumption from RSU 1.

S513, rechecking consumption and reading balance;

It will be appreciated that RSU1 may send a review consume instruction to the IIC card, review the consumption, and read the balance,

S514, returning the read balance;

it can be understood that after rechecking the IIC card for consumption, the read balance can be returned to RSU1.

S515, returning a result;

It will be appreciated that RSU1 returns the IIC card to the PC as a result of the read balance.

S516, transaction is completed;

It will be appreciated that the PC, upon receiving the returned result, confirms that the balance is correct and thus can determine that the transaction is complete.

S517, dormancy OBU;

it will be appreciated that after the transaction is completed, the RSU1 may send a sleep instruction to the OBU to cause the OBU to sleep.

It should be emphasized that the present application is not limited to the process of requesting transaction data by means of a channel after the channel negotiation is successful.

Therefore, the ETC transaction in the embodiment of the application can check the balance after deduction, thereby improving the accuracy of the ETC transaction and avoiding the occurrence of deduction errors as far as possible.

Based on the above method embodiment, as shown in fig. 6, a data transmission device for ETC transaction is applied to a road side unit RSU, where the RSU is set in an electronic toll collection ETC lane, and the RSU has a target antenna; the device comprises:

A persistent transmitting module 610, configured to continuously transmit a channel negotiation request based on the target antenna in response to a vehicle being present on the ETC lane; the channel negotiation request is used for negotiating with a receiver to use a first channel when data interaction is carried out, wherein the first channel is a preset channel utilized when the target antenna works;

A receiving module 620, configured to receive negotiation result information continuously returned by the at least one on-board unit OBU; the negotiation result information continuously returned by any OBU is the result information which is fed back by the OBU after continuously receiving the channel negotiation request and represents successful negotiation;

A first detection module 630, configured to detect whether there are multiple pieces of negotiation result information fed back by an OBU of the same vehicle in the ETC lane in the received negotiation result information, where the multiple pieces of negotiation result information satisfy a predetermined auxiliary condition; the judging mode that the negotiation result information satisfies the preset auxiliary condition comprises the following steps: based on the information source positioning result of the microwave signals to which the plurality of negotiation result information belongs, recognizing that the same vehicle gradually approaches the RSU to which the target antenna belongs, and judging that the plurality of negotiation result information meets a preset auxiliary condition;

A determining module 640, configured to determine that the OBU negotiation channel with the target vehicle on the ETC lane is successful if the OBU negotiation channel exists; wherein the OBU of the target vehicle is an OBU of an issuer that is the information of the plurality of negotiation results;

A transmitting module 650, configured to send, to an OBU of the target vehicle, a data request for performing an ETC transaction through the target antenna with the first channel as a working channel of the target antenna in response to success of negotiating a channel with the OBU of the target vehicle on the ETC lane;

A second detection module 660, configured to detect whether ETC transaction data returned by the OBU of the target vehicle is not received for more than a predetermined time;

A retransmission module 670, configured to switch, if yes, an operating channel of the target antenna from the first channel to the second channel, and retransmit, through the target antenna, the data request to an OBU of the target vehicle, so as to perform an ETC transaction after receiving that the OBU of the target vehicle returns transaction data based on the data request;

Optionally, based on the source location result of the microwave signals to which the plurality of negotiation result information belongs, the manner of identifying that the same vehicle gradually approaches the RSU to which the target antenna belongs includes:

Calculating the distance between a position point represented by a source positioning result of a microwave signal to which the negotiation result information belongs and the RSU according to each negotiation result information in the plurality of negotiation results to obtain a distance corresponding to the negotiation result information;

Sequencing the distances corresponding to the calculated negotiation result information according to the sequence from the early to the late of the sending time of the negotiation result information to obtain a sequencing sequence;

And if the sorting sequence is a descending sequence of the distance, recognizing that the same vehicle gradually approaches the RSU to which the target antenna belongs.

Optionally, the identifying manner of whether any negotiation result information is information fed back by an OBU of a vehicle on the ETC lane includes:

identifying whether the negotiation result information meets a preset screening condition, if so, identifying that the negotiation result information is information fed back by an OBU of a vehicle on the ETC lane;

The predetermined screening conditions include: the corresponding signal strength exceeds a preset threshold value, or the information source positioning result of the microwave signal represents that the information source of the microwave signal is positioned in the ETC lane area; the signal intensity corresponding to any negotiation result information is the signal intensity of the microwave signal which is received by the target antenna and carries the negotiation result information; the source location result is determined using digital beam forming, DBF, techniques for the target antenna.

Optionally, the negotiation result information returned by any OBU carries the Mac address of the OBU;

Optionally, the predetermined time is determined based on a predetermined delay time and a processing time of the ETC transaction by the OBU of the target vehicle.

In the technical scheme of the application, related operations such as acquisition, storage, use, processing, transmission, provision, disclosure and the like of the personal information of the user are performed under the condition that the authorization of the user is obtained.

The embodiment of the application also provides an electronic device, as shown in fig. 7, including:

A memory 701 for storing a computer program;

The processor 702 is configured to implement the above-mentioned data transmission method for ETC transaction when executing the program stored in the memory 701.

And the electronic device may further comprise a communication bus and/or a communication interface, through which the processor 702, the communication interface, and the memory 701 communicate with each other.

The communication bus mentioned above for the electronic device may be a peripheral component interconnect standard (PERIPHERAL COMPONENT INTERCONNECT, PCI) bus or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, etc. The communication bus may be classified as an address bus, a data bus, a control bus, or the like. For ease of illustration, the figures are shown with only one bold line, but not with only one bus or one type of bus.

The communication interface is used for communication between the electronic device and other devices.

The Memory may include random access Memory (Random Access Memory, RAM) or may include Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the aforementioned processor.

The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but may also be a digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components.

In yet another embodiment of the present application, a computer readable storage medium is provided, in which a computer program is stored, which when executed by a processor implements any of the above-mentioned data transmission methods for ETC transactions.

In yet another embodiment of the present application, there is also provided a computer program product containing instructions that, when run on a computer, cause the computer to perform any of the data transmission methods for ETC transactions described in the previous embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, tape), an optical medium (e.g., DVD), or a Solid state disk (Solid STATE DISK, SSD), etc.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. The data transmission method for ETC transaction is characterized by being applied to a Road Side Unit (RSU) which is arranged on an ETC lane for electronic toll collection and provided with a target antenna; the method comprises the following steps:

If yes, switching the working channel of the target antenna from the first channel to a second channel, retransmitting the data request to the OBU of the target vehicle through the target antenna, and carrying out ETC transaction after receiving the data request returned by the OBU of the target vehicle based on the data request;

2. The method of claim 1, wherein identifying, based on the source location results of the microwave signals to which the plurality of negotiation result information pertains, a manner in which the same vehicle gradually approaches an RSU to which the target antenna pertains comprises:

3. The method of claim 1, wherein the identifying of whether any negotiation result information is information fed back by an OBU of a vehicle on the ETC lane comprises:

4. The method of claim 1 wherein the negotiation result information returned by any one OBU carries the Mac address of the OBU;

5. The method of any of claims 1-4, wherein the predetermined time is determined based on a predetermined delay time and a processing time of the target vehicle's OBU to conduct an ETC transaction.

6. The data transmission device for ETC transaction is characterized by being applied to a Road Side Unit (RSU) which is arranged on an ETC lane for electronic toll collection and provided with a target antenna; the device comprises:

the second detection module is used for detecting whether ETC transaction data returned by the OBU of the target vehicle is not received for more than a preset time;

A retransmission module, configured to switch, if yes, a working channel of the target antenna from the first channel to a second channel, and retransmit, through the target antenna, the data request to an OBU of the target vehicle, so as to perform an ETC transaction after receiving that the OBU of the target vehicle returns transaction data based on the data request;

7. The apparatus of claim 6, wherein the means for identifying that the same vehicle is gradually approaching an RSU to which the target antenna belongs based on a source location result of the microwave signals to which the plurality of negotiation result information belong comprises:

8. The apparatus of claim 6, wherein the manner of identifying whether any negotiation result information is information fed back by an OBU of a vehicle on the ETC lane comprises:

Identifying whether the negotiation result information meets a preset screening condition, if so, identifying that the negotiation result information is information fed back by an OBU of a vehicle on the ETC lane; the predetermined screening conditions include: the corresponding signal strength exceeds a preset threshold value, or the information source positioning result of the microwave signal represents that the information source of the microwave signal is positioned in the ETC lane area; the signal intensity corresponding to any negotiation result information is the signal intensity of the microwave signal which is received by the target antenna and carries the negotiation result information; the source location result is determined using digital beam forming, DBF, techniques for the target antenna.

9. The apparatus of claim 6 wherein the negotiation result information returned by any one OBU carries a Mac address of the OBU;

10. The apparatus of any of claims 6-9, wherein the predetermined time is determined based on a predetermined delay time and a processing time of the target vehicle's OBU to perform an ETC transaction.

11. An electronic device, comprising:

A memory for storing a computer program;

A processor for implementing the method of any of claims 1-5 when executing a program stored on a memory.

12. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when executed by a processor, implements the method of any of claims 1-5.

13. A computer program product comprising a computer program which, when executed by a processor, implements the method according to any of claims 1-5.