CN112734960A

CN112734960A - Road side unit, method and computer readable storage medium for ETC system

Info

Publication number: CN112734960A
Application number: CN202011603142.9A
Authority: CN
Inventors: 刘文涛; 韩茂强; 王庆飞; 赵昱阳
Original assignee: Beijing Wanji Intelligent Network Technology Co ltd
Current assignee: Beijing Wanji Intelligent Network Technology Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-04-30
Anticipated expiration: 2040-12-30
Also published as: CN112734960B

Abstract

The present disclosure relates to a roadside unit, a method, and a computer-readable storage medium for an ETC system. The road side unit comprises a plurality of antennas, wherein each antenna is used for establishing wireless connection with a plurality of vehicle-mounted units; a controller connected with the plurality of antennas and configured to: determining a distance between each antenna and each on-board unit; selecting a target antenna corresponding to each vehicle-mounted unit from a plurality of antennas based on the distance; and one of the target antennas and the corresponding vehicle-mounted unit are made to preferentially perform service interaction based on the distance. The method and the device determine the appropriate target antenna corresponding to each vehicle-mounted unit by using the distances between the plurality of antennas and the plurality of vehicle-mounted units, and preferentially select the vehicle-mounted unit corresponding to one of the target antennas to perform service interaction based on the distances, so that reverse transactions are reduced, and the success rate of service interaction of the ETC system is improved.

Description

Road side unit, method and computer readable storage medium for ETC system

Technical Field

The present disclosure relates generally to the field of ETC technology. More particularly, the present disclosure relates to a roadside unit, a method, and a computer-readable storage medium for an ETC system.

Background

This section is intended to provide a background or context to the embodiments of the disclosure recited in the claims. The description herein may include concepts that could be pursued, but are not necessarily ones that have been previously conceived or pursued. Thus, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims in this application and is not admitted to be prior art by inclusion in this section.

An Electronic Toll Collection ("ETC") system is one of the service functions of an intelligent transportation system, and is suitable for automatic Toll Collection on expressways or bridges. The ETC system carries out background settlement processing with a bank by using a computer networking technology through special short-range communication between a vehicle-mounted electronic tag arranged on a vehicle windshield and a microwave antenna on an ETC lane of a toll station, so that the aim of paying the toll of the expressway or the bridge without parking of the vehicle through the expressway or the bridge toll station is fulfilled. The existing ETC system also arranges a microwave antenna on a lane portal frame, thereby realizing a sectional charging mode.

By adopting the existing ETC system, the problems of charging failure or unsuccessful transaction and the like often exist due to factors such as overlarge traffic flow, reverse vehicle transaction and the like.

Disclosure of Invention

To address at least one or more of the above technical problems, the present disclosure provides a roadside unit, a method, and a computer-readable storage medium for an ETC system. According to the method and the device, the target antenna of each vehicle-mounted unit can be selected conveniently according to the distance between the antenna and the vehicle-mounted unit, and the target antenna and the corresponding vehicle-mounted unit are selected preferentially to perform service interaction, so that the service interaction with the vehicle-mounted unit of the reverse vehicle is reduced, and the success rate of the service interaction is improved. In view of this, the present disclosure provides corresponding solutions in the following aspects.

In a first aspect, the present disclosure provides a roadside unit for an ETC system, comprising a plurality of antennas, wherein each antenna is used for establishing wireless connection with a plurality of on-board units; a controller connected with the plurality of antennas and configured to: determining a distance between each antenna and each on-board unit; selecting a target antenna corresponding to each of the on-board units from the plurality of antennas based on the distances; and one of the target antennas and the corresponding vehicle-mounted unit are made to preferentially perform service interaction based on the distance.

In one embodiment, in determining the distance between each antenna and each on-board unit, the controller is configured to: acquiring first position information of each antenna; acquiring second position information of each vehicle-mounted unit; and determining the distance based on the first and second location information, the distance comprising a lateral distance and a longitudinal distance of each of the on-board units relative to each of the antennas.

In another embodiment, in selecting the target antenna of each on-board unit from the plurality of antennas based on the distance, the controller is further configured to: determining a plurality of lateral distances for each on-board unit relative to the plurality of antennas; selecting a target antenna corresponding to the each on-board unit from the plurality of antennas based on the plurality of lateral distances.

In yet another embodiment, in selecting the target antenna corresponding to each on-board unit from the plurality of antennas based on the plurality of lateral distances, the controller is further configured to: selecting a lateral distance from the plurality of lateral distances that is less than a lateral threshold of the corresponding antenna; determining the minimum transverse distance from the screened transverse distances; and selecting a target antenna corresponding to each vehicle-mounted unit from the plurality of antennas based on the minimum transverse distance.

In yet another embodiment, in prioritizing traffic interaction between one of the target antennas and the corresponding on-board unit based on the distance, the controller is further configured to: determining a longitudinal distance of each on-board unit relative to a corresponding target antenna; screening out the minimum longitudinal distance according to each longitudinal distance; and determining that the vehicle-mounted unit corresponding to the minimum longitudinal distance and the target antenna thereof preferentially carry out service interaction.

In a second aspect, the present disclosure also provides a method for a roadside unit of an ETC system, wherein the roadside unit includes a plurality of antennas, the method comprising: determining a distance between each antenna and each on-board unit; selecting a target antenna corresponding to each of the on-board units from the plurality of antennas based on the distances; and one of the target antennas and the corresponding vehicle-mounted unit are made to preferentially perform service interaction based on the distance.

In one embodiment, determining the distance between each antenna and each on-board unit comprises: acquiring first position information of each antenna; acquiring second position information of each vehicle-mounted unit; and determining the distance based on the first and second location information, the distance comprising a lateral distance and a longitudinal distance of each of the on-board units relative to each of the antennas.

In another embodiment, selecting a target antenna corresponding to each of the on-board units from the plurality of antennas based on the distance includes: determining a plurality of lateral distances for each on-board unit relative to the plurality of antennas; selecting a target antenna corresponding to the each on-board unit from the plurality of antennas based on the plurality of lateral distances.

In yet another embodiment, selecting the target antenna corresponding to each on-board unit from the plurality of antennas based on the plurality of lateral distances comprises: selecting a lateral distance from the plurality of lateral distances that is less than a lateral threshold of the corresponding antenna; determining the minimum transverse distance from the screened transverse distances; and selecting a target antenna corresponding to each of the on-board units from the plurality of antennas based on the minimum lateral distance.

In yet another embodiment, prioritizing the service interaction between one of the target antennas and the corresponding on-board unit based on the distance comprises: determining a longitudinal distance of each on-board unit relative to a corresponding target antenna; screening out the minimum longitudinal distance according to each longitudinal distance; and determining that the vehicle-mounted unit corresponding to the minimum longitudinal distance and the target antenna thereof preferentially carry out service interaction.

In a third aspect, the present disclosure also provides a computer readable storage medium comprising program instructions for a roadside unit of an ETC system, which when executed by one or more processors, cause the method according to the preceding embodiments to be carried out.

According to the embodiment of the disclosure, by determining the distance between the antenna and the vehicle-mounted unit, the target antenna of each vehicle-mounted unit can be selected according to the distance, and one of the target antennas and the corresponding vehicle-mounted unit are preferentially selected to perform service interaction (such as vehicle information identification, electronic fee deduction and the like), so that the service interaction with the vehicle-mounted unit of the reverse vehicle is reduced, and the success rate of the service interaction is improved. Further, the scheme of the disclosure can determine a reasonable interaction area by selecting the target antenna by using the minimum transverse distance between the vehicle-mounted unit and the antenna. Meanwhile, service interaction with a vehicle-mounted unit of a reverse vehicle is avoided, so that reverse service interaction is reduced. Further, according to the embodiment of the disclosure, the minimum longitudinal distance between the vehicle-mounted unit and the target antenna is used for preferentially selecting the vehicle-mounted unit which reaches the portal frame first and performing service interaction with the corresponding target antenna, so that the service interaction can be performed in order, and the success rate of the service interaction is improved. Furthermore, the embodiment of the disclosure can effectively restore the driving track of the vehicle by installing a plurality of antennas, so that the service interaction is more reasonable.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

FIG. 1 is an exemplary diagram illustrating an existing electronic toll collection system;

fig. 2 is an exemplary block diagram illustrating an example configuration of a roadside unit for an ETC system according to an embodiment of the present disclosure;

FIG. 3 is an exemplary schematic diagram illustrating a roadside unit arrangement according to an embodiment of the present disclosure; and

fig. 4 is an exemplary flowchart illustrating a method for a roadside unit of an ETC system according to an embodiment of the disclosure.

Detailed Description

The principles and spirit of the present disclosure will be described with reference to a number of exemplary embodiments. It is understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to practice the present disclosure, and are not intended to limit the scope of the present disclosure in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As described in the background section, "ETC" is one of the service functions of an intelligent transportation system, and is generally applied to a highway or a bridge to implement automatic toll collection. The ETC performs wireless communication and information exchange between an on-vehicle device mounted on a vehicle and an antenna mounted on a lane of a toll station, thereby achieving the purpose that the vehicle can pay the toll of an expressway or a bridge through the expressway or the bridge toll station without parking. The ETC system mainly comprises a vehicle automatic identification system, a central management system, other auxiliary facilities and the like. The automatic vehicle identification system comprises an On Board Unit (OBU), a Road Side Unit (RSU), a loop sensor and the like; the central management system is provided with a large database for storing information of a large number of registered vehicles and users; the ancillary facilities may include, for example, cameras, railings, and the like.

Fig. 1 shows an exemplary schematic diagram of an existing electronic toll collection system. A roadside unit 2 is arranged on one side of the ETC lane 1 in the vehicle driving direction, and the roadside unit 2 is usually installed beside a high-speed or bridge toll station or installed at a portal frame and the like on an expressway; the other side on the ETC lane 1 is arranged with a camera 3 and a balustrade 4. The on-board unit 5, also called transponder or electronic tag, stores information such as owner information, model number of the vehicle, and physical parameters of the vehicle, and the on-board unit 5 is usually mounted on the windshield of the vehicle. The on-board unit 5 also typically needs to be activated when it is first installed and can only be used normally after successful activation.

When the vehicle travels along the ETC lane 1 through the toll gate, the vehicle is first sensed by a loop sensor (not shown in the drawings) disposed below the ETC lane 1. Next, the roadside unit 2 issues an inquiry signal, and the on-board unit 5 responds. In one application scenario, the road side unit 2 and the vehicle side unit 5 may perform half-duplex communication using a dedicated short-range communication standard protocol, thereby achieving bidirectional communication and data exchange between the two. When the center management system 6 acquires vehicle information (the vehicle information includes information such as the license plate number or the model of the vehicle) from the on-board unit 5 via the roadside unit 2, the center management system 6 compares and judges the information with corresponding information in its database, thereby performing different actions according to different situations. For example, the tolls paid this time are deducted from the prepaid account of the vehicle by a charge management unit in the central management system, or the central management system sends instructions to other auxiliary facilities to work. For example, the illegal vehicle is photographed by the camera 3, the balustrade 4 is automatically controlled, or the vehicle is instructed to travel by a display device (red, yellow, green light, etc.).

By adopting the existing ETC system, vehicle information identification can be realized without stopping the vehicle, and transactions such as electronic fee deduction and the like are completed. Through the transaction mode, convenience is brought to the user, and management of traffic order is facilitated. However, the above-described ETC system still has the following drawbacks.

In one aspect, in existing ETC systems, only one antenna is typically provided in a roadside unit at a high-speed or bridge toll station. The electronic toll collection system is interacted with a plurality of vehicle-mounted units through one antenna, so that electronic toll collection transaction without stopping a vehicle is realized. However, when the amount of traffic is excessive, there may be a problem of an error in identifying the vehicle. For example, the roadside unit may recognize information of other vehicles when interacting with the current vehicle, which may result in a fee deduction error and further affect the user experience.

On the other hand, a portal frame is usually arranged on the expressway at intervals, and the road side unit is arranged on the portal frame, so that the driving track of the vehicle is recorded, the sectional fee deduction is realized, and the fee deduction transaction is avoided only according to the record of an entry point and an exit point. However, since a highway generally includes a plurality of lanes, and generally includes a shuttle lane. In this scenario, the road side unit may identify the on board unit of the reverse vehicle, thereby affecting the traffic interaction of the road side unit with the on board unit of the forward vehicle.

By combining the above analysis, it can be known that, with the existing ETC system, due to factors such as excessive traffic flow, reverse vehicle transaction, etc., problems such as unreasonable charging, unsuccessful transaction, etc. may exist.

In view of the above, to overcome the drawbacks of one or more aspects, the present disclosure provides a roadside unit, a method and a computer-readable storage medium for an ETC system. And determining the distance between each antenna and each vehicle-mounted unit so as to preferentially execute the service interaction between the target antenna and the target vehicle.

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. It is to be understood that the described embodiments of the present disclosure are exemplary only and not exhaustive. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

Fig. 2 illustrates an exemplary block diagram of a roadside unit 200 for an ETC system according to an embodiment of the present disclosure. As shown, the rsu 200 includes an antenna 201 and a controller 202, wherein the antenna 201 may include a plurality of antennas 210. In one implementation scenario, multiple antennas may be arranged at intervals on a gantry of multiple lanes, and one antenna may be arranged for each lane correspondingly (e.g., as shown in fig. 3). Further, the antenna in the roadside unit of the present disclosure may be a high-gain directional beam steering read-write antenna. As known to those skilled in the art, a high-gain directional beam steering read-write antenna is a microwave transceiver module, and the microwave transceiver module can perform various operations of transmission/reception, modulation/demodulation, encoding/decoding, encryption/decryption, and the like of signals and data.

In one implementation scenario, each of the antennas described above is used to wirelessly connect with an on-board unit in order to establish wireless communication with the on-board unit. In particular, the antenna may employ Dedicated Short Range Communication ("DSRC") technology to establish a microwave Communication link with the on-board unit, thereby enabling microwave Communication between the on-board unit and the antenna. Based on the microwave communication, the vehicle can realize business interaction between the antenna and the vehicle-mounted unit without stopping, such as vehicle identity information identification, electronic fee deduction transaction, vehicle running track, time for getting in and out of a highway or a bridge and the like.

According to embodiments of the present disclosure, the controller 202 may be connected with a plurality of antennas and may be configured to determine a distance between each antenna and each on-board unit. Further, the controller may select a target antenna corresponding to each on-board unit from the plurality of antennas based on the distance and preferentially make one of the target antennas perform service interaction with its corresponding on-board unit, so that the most suitable antenna may be implemented to service the on-board unit most suitable for being served thereby. In other words, the accurate pairing of the antenna and the vehicle-mounted unit is realized by the distance, so that the success rate of transaction is remarkably improved.

Still further, the controller of the present disclosure may determine a distance between each antenna and each in-vehicle unit based on the first location information of each antenna and the second location information of each in-vehicle unit. One lateral distance and one longitudinal distance of each on-board unit with respect to each antenna (e.g., lateral distance XA1 and longitudinal distance YA1 of the on-board unit in vehicle a with respect to antenna 1, lateral distance XB1 and longitudinal distance YB1 of the on-board unit in vehicle B with respect to antenna 1 as shown in fig. 3). In one embodiment, the first location information for each antenna may be, for example, global positioning system ("GPS") coordinates for each antenna, which may be manually input by a technician to a controller within the roadside unit at the time of installation. Alternatively, a positioning module may be disposed inside each antenna, so that the controller may acquire the GPS coordinates of each antenna through the positioning module. It should be noted that the foregoing two ways of obtaining the first position information of each antenna are merely exemplary, and those skilled in the art may obtain the first position information in other ways, which is not limited by the present disclosure.

In one embodiment, the above-mentioned second location information of each on-board unit may be, for example, GPS coordinates of the on-board unit. In one implementation scenario, the GPS coordinates of each on-board unit may be directly obtained via a Controller Area Network ("CAN") or Local Interconnect Network ("LIN"). One skilled in the art can select one of the aforementioned ways to obtain the second location information of each on-board unit, and the present disclosure is not limited thereto.

It can be seen that the first location information and the second location information obtained as described above may both be GPS coordinates, and may be specifically expressed as latitude and longitude coordinates. For the purpose of calculation, those skilled in the art can convert the GPS coordinates to plane coordinates using existing coordinate conversion software, whereby the lateral distance and the longitudinal distance to be discussed later can be determined.

After acquiring the above-described first position information of each antenna and the above-described second position information of each on-vehicle unit, the present disclosure constructs a coordinate system with the first position information of the antenna. Specifically, the mounting position of each antenna (indicated by the first position information) may be respectively taken as the origin of coordinates within the planar rectangular coordinate system; taking an axis parallel to the transverse direction of the portal frame as an x axis (such as the x axis shown in FIG. 3) of the plane rectangular coordinate system; and the axis perpendicular to the transverse direction of the portal frame is taken as the y-axis (such as the y-axis shown in fig. 3) of the plane rectangular coordinate system. Based on such a coordinate system, the controller may determine a lateral distance and a longitudinal distance of each on-board unit with respect to each antenna, and may thereby obtain a plurality of lateral distances and a plurality of longitudinal distances from the distances of each on-board unit with respect to the plurality of antennas. The transverse and longitudinal distances will be described in detail below with reference to fig. 3.

Fig. 3 shows an exemplary schematic diagram of a roadside unit arrangement according to an embodiment of the present disclosure. As shown in fig. 3, a gantry 7 is mounted in the traveling direction of the vehicle, and

antennas

301, 302, 303 are arranged above it. On one side of the gantry 7, a controller 304 is arranged, which can be connected to the

antennas

301, 302, 303 in a wired or wireless manner (not shown in the figure). Further shown in fig. 3 are three lanes, lane 1 (which may be a passing lane, for example), lane 2 (which may be a traffic lane, for example) and lane 3 (which may be an emergency lane, for example). Where antenna 301 corresponds to lane 1, antenna 302 corresponds to lane 2, and antenna 3 corresponds to lane 3. The figure also shows an example of a vehicle a and a vehicle B, wherein the vehicle a is travelling on a lane 1 and the vehicle B is travelling on a lane 2. Although not shown in the drawings, it is understood that the on-board units of the present disclosure are arranged in the vehicles a and B, and the on-board units may wirelessly communicate with the antenna to implement a transaction service of the ETC system.

It is to be understood that the scenario and specific arrangement shown in fig. 3 are merely exemplary, and those skilled in the art may determine the number of antennas according to the number of lanes, which is not limited by the present disclosure. Meanwhile, the present disclosure also does not limit the installation position of the antenna. For example, the antenna may be disposed at a middle position of the corresponding lane or at a position to the left or right of the corresponding lane, or flexibly disposed according to the historical road conditions of each lane.

Based on the arrangement of the roadside units (including the controller and the plurality of antennas) shown in fig. 3, the lateral distance and the longitudinal distance of the on-board unit in the vehicle a with respect to the antenna 301, the antenna 302, and the antenna 303 can be obtained with the antenna 301, the antenna 302, and the antenna 303 as coordinate origins, respectively. Similarly, with the antenna 301, the antenna 302, and the antenna 303 as the origin of coordinates, the lateral distance and the longitudinal distance of the on-board unit in the vehicle B with respect to the antenna 301, the antenna 302, and the antenna 303 can also be obtained. Based on the distance, the target antenna corresponding to each vehicle-mounted unit can be determined according to the transverse distance of each vehicle-mounted unit relative to each antenna. Further, based on the longitudinal distance of each on-board unit relative to the corresponding target antenna, it may be preferable to have one of the target antennas perform service interaction with its corresponding on-board unit.

More specifically, a rectangular coordinate system is established with the antenna 301 as the origin of coordinates and with the x-axis and the y-axis shown in fig. 3, and the coordinates (XA1, YA1) of the on-board unit of the vehicle a with respect to the antenna 301 are obtained. A rectangular coordinate system is established with the x-axis and the y-axis shown in fig. 3 with the antenna 302 as the origin of coordinates, and coordinates (XA2, YA2) of the on-board unit of the vehicle a with respect to the antenna 302 are obtained. A rectangular coordinate system is established with the x-axis and the y-axis shown in fig. 3 with the antenna 303 as the origin of coordinates, and coordinates (XA3, YA3) of the on-board unit of the vehicle a with respect to the antenna 303 are obtained.

According to the above description, with the antenna 301, the antenna 302, and the antenna 303 as the origin of coordinates, respectively, the coordinates (XB1, YB1), (XB2, YB2), (XB3, YB3) of the on-vehicle unit of the vehicle B with respect to the antenna 301, the antenna 302, and the antenna 303 can be obtained. Additionally, the origin coordinates of the coordinate system may also be disposed at, for example, one end of a gantry, or anywhere on a highway, which is not limited by this disclosure.

With the plurality of coordinates described above, the present disclosure can obtain a plurality of lateral distances of each on-board unit with respect to the plurality of antennas. For example, the plurality of lateral distances obtained by the on-board unit in the vehicle a with respect to the antenna 301, the antenna 302, and the antenna 303 are XA1, XA2, and XA3, respectively; the plurality of lateral distances obtained by the on-board unit in vehicle B with respect to antenna 301, antenna 302, and antenna 303 are XB1, XB2, and XB3), respectively). Similarly, a plurality of longitudinal distances of each on-board unit with respect to the plurality of antennas may also be obtained. For example, the plurality of longitudinal distances obtained by the on-board unit in the vehicle a with respect to the antenna 301, the antenna 302, and the antenna 303 are YA1, YA2, and YA3, respectively; the plurality of longitudinal distances obtained by the on-board units in the vehicle B with respect to the

antennas

301, 302, and 303 are YB1, YB2, and YB3, respectively. Based on the aforementioned plurality of lateral distances, the controller of the present disclosure may select a target antenna corresponding to each on-board unit from the plurality of antennas. Further, the controller may cause one of the target antennas to engage in a preferred service interaction with its corresponding on-board unit based on the plurality of longitudinal distances and the target antenna.

To select a suitable antenna from a plurality of antennas, i.e. the target antenna described above, the present disclosure introduces a lateral threshold for the antenna and selects the target antenna by comparing the lateral distance obtained above with the lateral threshold. In one embodiment, the lateral threshold of the present disclosure may be set by human (e.g., statistically derived from empirical or historical data), and a different lateral threshold may be set for each antenna, expressed in units of length metric (e.g., meters). Furthermore, by setting the transverse threshold value, interaction between the antenna and the vehicle-mounted unit of the reverse vehicle can be avoided, so that electronic fee deduction transaction is more accurate and reasonable, and abnormity and errors of transaction are avoided.

After the lateral threshold for each antenna is set, a lateral distance that is less than the lateral threshold for the corresponding antenna may be screened from the plurality of lateral distances. The controller of the present disclosure may cause the antenna to not conduct service interaction with the on-board unit when a lateral distance of the on-board unit relative to the antenna is greater than a lateral threshold of the antenna. In other words, the onboard unit is not adapted to be served by the aforementioned antenna. In contrast, when the lateral distance of the on-board unit relative to the antenna is less than the lateral threshold of the antenna, then it may be determined (or preliminarily determined) that the on-board unit is suitable for service or access by the antenna. In some scenarios, when there is more than one antenna that satisfies the aforementioned lateral threshold condition, then aspects of the present disclosure may further proceed to select a minimum lateral distance from a plurality of lateral distances that are less than the lateral threshold, and take as the target antenna the antenna to which the minimum lateral distance of the on-board unit relative to the antenna corresponds.

Taking vehicle a and vehicle B shown in fig. 3 as an example, assuming that the on-board unit of vehicle a has the smallest lateral distance XA1 with respect to lateral coordinates (i.e., lateral distances) XA1, XA2, and XA3 in antenna 301, antenna 302, and antenna 303, antenna 301 may be the target antenna for the on-board unit of vehicle a based on the above discussion. Similarly, assuming that lateral distance XB2 with respect to antenna 302 is smallest among lateral coordinates XB1, XB2 and XB3 in the on-board unit of vehicle B with respect to antenna 301, antenna 302 and antenna 303, antenna 302 can be taken as the target antenna for the on-board unit of vehicle B.

In some scenarios, when the traffic flow is too large, the scheme of the present disclosure may have multiple sets of antennas and vehicle-mounted units interacting simultaneously, including the vehicle-mounted unit of a vehicle driving behind interacting with the antennas in advance, thereby causing a decrease in the success rate of service interaction between the roadside unit and the vehicle-mounted unit. In view of this, the embodiments of the present disclosure further provide a minimum longitudinal distance of each vehicle-mounted unit relative to each target antenna, so as to preferentially enable the vehicle-mounted unit with the minimum longitudinal distance to interact with its corresponding target antenna.

Taking again the scenario shown in fig. 3 as an example, it is assumed that the target antenna of the on-board unit of vehicle a is antenna 301 and the target antenna of the on-board unit of vehicle B is antenna 302, determined by the minimum lateral distance. Further, it is determined that the longitudinal distance of the vehicle a with respect to the antenna 301 is YA1 and the longitudinal distance of the vehicle B with respect to the antenna 302 is YB2, and it is assumed that YB2 is smaller than YA1, that is, the vehicle B arrives in the vicinity of the gantry 7 earlier with respect to the vehicle a. In view of this, the controller will preferentially conduct business interactions with the on-board unit of target vehicle B via target antenna 302. After that, the controller performs service interaction with the on-board unit of the target vehicle a traveling to the vicinity of the gantry via the target antenna 301.

In some embodiments, when the target antenna and the on-board unit corresponding to the target antenna perform service interaction, and the vehicle may have a lane change condition, the controller may adjust (i.e., select) the adjusted target antenna corresponding to the on-board unit in time based on a lateral distance between the on-board unit of the vehicle after lane change and the antenna, so as to ensure a success rate of service interaction of the ETC system.

According to the embodiment of the disclosure, the plurality of antennas are arranged on the lane portal frame and are arranged to correspond to one lane, and the target antenna which is preferentially interacted with the on-board unit corresponding to the on-board unit is selected by the controller according to the transverse distance and the longitudinal distance of each on-board unit relative to each antenna, so that the interaction between a reverse vehicle and the antenna can be reduced, and the success rate of the interaction is improved. Meanwhile, the driving track of the vehicle can be effectively restored, so that electronic fee deduction transaction is rationalized.

Fig. 4 illustrates an exemplary flow chart of a method 400 for a roadside unit of an ETC system according to an embodiment of the disclosure. As shown, at step 402, a distance between each of a plurality of antennas and each of a plurality of on-board units is determined. In one embodiment, each antenna may be disposed on a gantry, and one antenna for each lane. The aforementioned distances may include a lateral distance and a longitudinal distance of each on-board unit with respect to each antenna.

More specifically, the lateral distance and the longitudinal distance between each antenna and each in-vehicle unit may be determined according to the first position information of each antenna and the second position information of each in-vehicle unit. Wherein the first location information may be GPS coordinates of the antenna acquired when the antenna is installed, and the second location information may be GPS coordinates of the on-board unit acquired by a CAN network or a LIN network. Further, with each antenna as a coordinate origin, a lateral distance and a longitudinal distance of each on-board unit with respect to each antenna are acquired based on the first position information and the second position information. To facilitate the acquisition of the aforementioned lateral coordinates and longitudinal coordinates, the GPS coordinates may be converted into planar coordinates by conversion software.

At step 404, a target antenna corresponding to each on-board unit is selected from the plurality of antennas based on the distance. More specifically, a plurality of lateral distances and a plurality of longitudinal distances of each on-board unit with respect to the plurality of antennas may be acquired first. Further, a lateral distance that is less than a lateral threshold of the corresponding antenna is selected from the plurality of lateral distances, then a minimum lateral distance is determined from the selected lateral distances, and a target antenna corresponding to each on-board unit is selected from the plurality of antennas based on the minimum lateral distance. For example, as shown in fig. 3, the target antenna of the on-board unit of vehicle a is antenna 301, and the target antenna of the on-board unit of vehicle B is antenna 302. Further, one of the target antennas is preferentially brought into business interaction with the corresponding on-board unit based on the minimum longitudinal distance of the on-board unit relative to the target antenna.

After the target antenna corresponding to each on-board unit is selected, at step 406, one of the target antennas is prioritized for service interaction with the corresponding on-board unit based on the distance. More specifically, the longitudinal distance of each vehicle-mounted unit relative to the corresponding target antenna is determined, and then the minimum longitudinal distance is screened out according to the longitudinal distances, so that the vehicle-mounted unit corresponding to the minimum longitudinal distance and the target antenna thereof perform service interaction preferentially. Also taking the above-mentioned fig. 3 as an example, the target antenna of the on-board unit of vehicle a is antenna 301, and the target antenna of the on-board unit of vehicle B is antenna 302, wherein the longitudinal distance of the on-board unit of vehicle B with respect to the target antenna is the smallest, so that the interaction between the target antenna and the on-board unit of vehicle B can be prioritized.

From the above description in connection with the figures, it will also be understood by those skilled in the art that the aspects of the present disclosure may also be implemented by software programs, and thus the present disclosure also provides a computer program product. The computer program product may be configured to implement the foregoing method for preferentially performing service interaction between a target antenna and a corresponding vehicle-mounted unit. Further, the computer program product may comprise computer program instructions for a roadside unit of the ETC system, which when executed by one or more processors, cause it to implement the aforementioned method of prioritizing business interaction of one of the target antennas with its corresponding on-board unit.

It should be noted that while the operations of the method of the present invention are depicted in the drawings in a particular order, this is not intended to require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Rather, the steps depicted in the flowcharts may change the order of execution. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.

It should be understood that the terms "first," "second," "third," and "fourth," etc. in the claims, description, and drawings of the present disclosure are used to distinguish between different objects and are not used to describe a particular order. The terms "comprises" and "comprising," when used in the specification and claims of this disclosure, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. As used in the specification and claims of this disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and claims of this disclosure refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

As used in this specification and claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

While various embodiments of the present disclosure have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the present disclosure. It should be understood that various alternatives to the embodiments of the disclosure described herein may be employed in practicing the disclosure. It is intended that the following claims define the scope of the disclosure and that equivalents or alternatives within the scope of these claims be covered thereby.

Claims

1. A roadside unit for an ETC system, comprising:

a plurality of antennas, wherein each antenna is used for establishing wireless connection with a plurality of vehicle-mounted units;

a controller connected with the plurality of antennas and configured to:

determining a distance between each antenna and each on-board unit;

selecting a target antenna corresponding to each of the on-board units from the plurality of antennas based on the distances; and

and one of the target antennas and the corresponding vehicle-mounted unit are enabled to preferentially perform service interaction based on the distance.

2. The roadside unit of claim 1, wherein in determining the distance between each antenna and each on-board unit, the controller is configured to:

acquiring first position information of each antenna;

acquiring second position information of each vehicle-mounted unit; and

determining the distance based on the first and second location information, the distance comprising a lateral distance and a longitudinal distance of each of the on-board units relative to each of the antennas.

3. The roadside unit of claim 2, wherein, in selecting the target antenna corresponding to the each on-board unit from the plurality of antennas based on the distances, the controller is further configured to:

determining a plurality of lateral distances for each on-board unit relative to the plurality of antennas;

selecting a target antenna corresponding to the each on-board unit from the plurality of antennas based on the plurality of lateral distances.

4. The roadside unit of claim 3, wherein, in selecting the target antenna corresponding to the each on-board unit from the plurality of antennas based on the plurality of lateral distances, the controller is further configured to:

selecting a lateral distance from the plurality of lateral distances that is less than a lateral threshold of the corresponding antenna;

determining the minimum transverse distance from the screened transverse distances; and

and selecting a target antenna corresponding to each vehicle-mounted unit from the plurality of antennas based on the minimum transverse distance.

5. The roadside unit of any of claims 1-4, wherein, in prioritizing traffic interaction between one of the target antennas and the corresponding on-board unit based on the distance, the controller is further configured to:

determining a longitudinal distance of each on-board unit relative to a corresponding target antenna;

screening out the minimum longitudinal distance according to each longitudinal distance; and

and determining that the vehicle-mounted unit corresponding to the minimum longitudinal distance and the target antenna thereof preferentially carry out service interaction.

6. A method for a roadside unit of an ETC system, wherein the roadside unit includes a plurality of antennas, the method comprising:

determining a distance between each antenna and each on-board unit;

7. The method of claim 6, wherein determining a distance between each antenna and each on-board unit comprises:

acquiring first position information of each antenna;

acquiring second position information of each vehicle-mounted unit; and

8. The method of claim 7, wherein selecting the target antenna corresponding to each of the on-board units from the plurality of antennas based on the distance comprises:

9. The method of claim 8, wherein selecting the target antenna corresponding to the each on-board unit from the plurality of antennas based on the plurality of lateral distances comprises:

10. The method of any of claims 6-9, wherein prioritizing traffic interaction between one of the target antennas and the corresponding on-board unit based on the distance comprises:

11. A computer readable storage medium comprising program instructions for a roadside unit of an ETC system, which when executed by one or more processors, cause the method of any one of claims 6-10 to be implemented.