KR102283163B1 - Method and apparatus for controlling roadside unit - Google Patents

Abstract

An embodiment of the present invention can provide a method for controlling a roadside unit (RSU) through a server. The method, in order to control a plurality of RSUs, includes the steps of: obtaining information on vehicles accessing at least one of a plurality of RSUs; determining target coverage of an RSU based on the information on the vehicles; determining at least one target RSU from among the plurality of RSUs based on the target coverage; determining target beamforming for the target coverage; and controlling the target RSU to cover the target coverage based on the target beamforming.

Description

RSU control method and device {METHOD AND APPARATUS FOR CONTROLLING ROADSIDE UNIT}

The following embodiments relate to a technology for controlling an RSU, and specifically, to a technology for controlling an RSU based on information on vehicles accessing the RSU.

The V2X communication system is a system that carries out communication between a vehicle and a vehicle (V2V; Vehicle to Vehicle) or between a vehicle and an infrastructure (V2I; Vehicle to Infra) by mounting a communication terminal in the vehicle. According to the V2X communication system, traffic accidents can be prevented in advance by exchanging information between one vehicle and another vehicle or infrastructure. For example, V2I may be called a Road Side Unit (RSU).

Korean Patent Registration No. 10-1592788 (2016.02.01) discloses a method of providing information to a vehicle using an RSU.

One embodiment may provide a method for controlling the RSU through a server.

An embodiment may provide a method for controlling an RSU through an electronic device of the RSU.

According to one aspect, a method for controlling a plurality of RSUs (Road Side Units), performed by a server, includes: obtaining information about vehicles accessing at least one of the plurality of RSUs; Determining a target coverage of the RSU based on the information on, determining at least one target RSU of the plurality of RSUs based on the target coverage, determining target beamforming for the target coverage, and and controlling the target RSU to cover the target coverage based on the target beamforming.

The information on the vehicles may include at least one of a number of vehicles accessing at least one of the plurality of RSUs, a vehicle speed, and vehicle handover information between RSUs.

The determining of the target coverage of the RSU based on the information on the vehicles may include: determining a target congestion level based on the information on the vehicles; It may include determining the target coverage.

The determining of at least one target RSU from among the plurality of RSUs based on the target coverage may include determining the target RSU preset for the target coverage.

The RSU control method may further include determining whether the current time is included in a preset range, and when the current time is included in the range, the target coverage may be determined.

According to another aspect, the server includes a memory in which a program for controlling a RSU (Road Side Unit) is recorded, and a processor for executing the program, wherein the program connects to at least one of the plurality of RSUs. obtaining information on vehicles; determining a target coverage of an RSU based on the information on the vehicles; determining at least one target RSU among the plurality of RSUs based on the target coverage; Determining target beamforming for the target coverage, and performing the steps of controlling the target RSU to cover the target coverage based on the target beamforming.

The determining of the target coverage of the RSU based on the information on the vehicles may include determining a target congestion level based on the information on the vehicles, and corresponding to the target congestion level among a plurality of preset coverages. It may include the step of determining the target coverage.

The determining of at least one target RSU from among the plurality of RSUs based on the target coverage may include determining the target RSU preset for the target coverage.

The program may further perform the step of determining whether the current time is included in a preset range, and when the current time is included in the range, the target coverage may be determined.

According to another aspect, the RSU control method, performed by an electronic device of a Road Side Unit (RSU), includes: obtaining information about vehicles accessing the RSU; at least one neighboring RSU adjacent to the RSU sharing the information with, determining target coverage of the RSU for an area including the RSU and neighboring RSUs based on the information, determining target beamforming for the target coverage, and the target and controlling the RSU to cover the target coverage based on beamforming.

The information on the vehicles may include at least one of the number of vehicles accessing the RSU, vehicle speed, and vehicle handover information between RSUs.

The determining of the target coverage of the RSU for the area including the RSU and the neighboring RSU based on the information includes: determining a target congestion level based on the information on the vehicles; and a plurality of preset coverages. and determining the target coverage corresponding to the target congestion level.

According to yet another aspect, an electronic device of a Road Side Unit (RSU) includes a memory in which a program for controlling the RSU is recorded, and a processor for executing the program, wherein the program is configured for vehicles accessing the RSU. obtaining information on the RSU, sharing the information with at least one neighboring RSU adjacent to the RSU, and determining target coverage of the RSU for an area including the RSU and the neighboring RSU based on the information , determining target beamforming for the target coverage, and controlling the RSU to cover the target coverage based on the target beamforming.

A method for controlling the RSU through the server may be provided.

A method of controlling the RSU through an electronic device of the RSU may be provided.

1 is a configuration diagram of an RSU control system according to an example.
2 is a configuration diagram of a server according to an embodiment.
3 is a flowchart of an RSU control method performed by a server according to an embodiment.
4 is a flowchart of a method for determining target coverage of an RSU according to an example.
5 illustrates a target coverage and a target RSU according to an example.
6 illustrates a target coverage and a target RSU according to another example.
7 illustrates a target coverage and a target RSU according to another example.
8 is a block diagram of an electronic device of an RSU according to an embodiment.
9 is a flowchart of an RSU control method performed by an electronic device according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes may be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all modifications, equivalents and substitutes for the embodiments are included in the scope of the rights.

The terms used in the examples are used for description purposes only, and should not be construed as limiting. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In addition, in the description with reference to the accompanying drawings, the same components are given the same reference numerals regardless of the reference numerals, and the overlapping description thereof will be omitted. In the description of the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description thereof will be omitted.

1 is a configuration diagram of an RSU control system according to an example.

RSUs 121 and 122 may be installed around the road to provide various information to the vehicles 131 and 132 . The RSUs 121 and 122 may perform a function similar to that of a base station of cellular communication. For example, when the vehicle 131 is located within the coverage of the RSU 121 , the vehicle 131 establishes a connection with the RSU to exchange data, and the vehicle 131 goes out of the coverage of the RSU 121 and the RSU When moving to the coverage of the RSU 122 adjacent to the 121, a handover occurs between the RSU 121 and the RSU 122 .

According to one aspect, the server 110 of the RSU control system may be connected to the plurality of RSUs 121 and 122 to efficiently manage the plurality of RSUs 121 and 122 . The plurality of RSUs 121 and 122 may be connected to each other and exchange data.

In general, the coverages of the plurality of RSUs 121 and 122 may be set relatively evenly in the area of the road managed by the RSU control system. For example, when the distance between the plurality of RSUs 121 and 122 is constant, the size of coverage set for each of the plurality of RSUs 121 and 122 may also be constant. In order to cover the coverage set for a specific RSU, specific beam forming for the antenna of the RSU may be determined. A directing angle of a specific antenna is determined through specific beamforming.

If the coverage of the RSU is widened, a smaller number of RSUs can be used, but if the number of vehicles accessing one RSU increases, the amount of data processing of the RSU increases and communication delay may occur. Accordingly, the number of RSUs to be installed may be determined assuming a relatively large amount of vehicle traffic. However, when the amount of vehicle traffic is low, such as at night, resources of the RSUs being operated may be wasted.

Hereinafter, a method of flexibly controlling RSUs based on the amount of traffic of a vehicle will be described in detail with reference to FIGS. 2 to 9 .

2 is a configuration diagram of a server according to an embodiment.

The server 200 includes a communication unit 210 , a processor 220 , and a memory 230 . For example, the server 200 may be the server 110 described with reference to FIG. 1 .

The communication unit 210 is connected to the processor 220 and the memory 230 to transmit and receive data. The communication unit 210 may be connected to another external device to transmit/receive data. Hereinafter, the expression "transmitting and receiving "A" may indicate transmitting and receiving "information or data representing A".

The communication unit 210 may be implemented as circuitry in the server 200 . For example, the communication unit 210 may include an internal bus and an external bus. As another example, the communication unit 210 may be an element that connects the server 200 and an external device. The communication unit 210 may be an interface. The communication unit 210 may receive data from an external device and transmit the data to the processor 220 and the memory 230 .

The processor 220 processes data received by the communication unit 210 and data stored in the memory 230 . A “processor” may be a data processing device implemented in hardware having circuitry having a physical structure for performing desired operations. For example, desired operations may include code or instructions included in a program. For example, a data processing device implemented as hardware includes a microprocessor, a central processing unit, a processor core, a multi-core processor, and a multiprocessor. , an Application-Specific Integrated Circuit (ASIC), and a Field Programmable Gate Array (FPGA).

Processor 220 executes computer readable code (eg, software) stored in memory (eg, memory 230 ) and instructions issued by processor 220 .

The memory 230 stores data received by the communication unit 210 and data processed by the processor 220 . For example, the memory 230 may store a program (or an application, software). The stored program may be a set of syntaxes coded to control the RSU and executable by the processor 220 .

According to one aspect, memory 230 may include one or more of volatile memory, non-volatile memory and random access memory (RAM), flash memory, hard disk drive, and optical disk drive.

The memory 230 stores an instruction set (eg, software) for operating the server 200 . The instruction set for operating the server 200 is executed by the processor 220 .

The communication unit 210 , the processor 220 , and the memory 230 will be described in detail below with reference to FIGS. 3 to 7 .

3 is a flowchart of an RSU control method performed by a server according to an embodiment.

The following steps 310 to 350 are performed by the server 200 described above with reference to FIG. 2 .

In step 310 , the server 200 obtains information on vehicles accessing at least one of a plurality of RSUs. A plurality of RSUs are installed around a road to cover a preset area, and the server 200 is connected to the plurality of RSUs to obtain information on vehicles transmitted by each of the plurality of RSUs.

For example, the information on the vehicles includes at least one of the number of vehicles accessing at least one of the plurality of RSUs, the speed of the vehicle, and vehicle handover information between the RSUs, and in the described embodiment It is not limited and may further include information related to the operation of the vehicle.

In step 320, the server 200 determines the target coverage of the RSU based on the information on the vehicles. The target coverage means an area that one RSU can cover based on the current vehicle traffic volume. The size of the target coverage may vary based on the amount of vehicle traffic.

A method of determining target coverage is described in detail below with reference to FIG. 4 .

In step 330 , the server 200 determines at least one target RSU from among the plurality of RSUs based on the target coverage. The target RSU may be an RSU that operates until there is a change in coverage, and an RSU that is not determined as the target RSU may not operate. Since some RSUs among all RSUs do not operate, power consumption due to RSU operation can be reduced. In addition, since handover between RSUs of a vehicle traveling at high speed is reduced, a communication signal throughput may be reduced, and a communication delay occurring during handover may also be reduced.

According to one aspect, a target RSU set for each of a plurality of target coverages may be preset. For example, the first target RSU set for the first target coverage and the second target RSU set for the second target coverage may be preset.

Target coverage and target RSU are described in detail below with reference to FIGS. 5 to 7 .

In step 340 , the server 200 determines target beamforming for target coverage. For example, target beamforming for the target RSU to cover the target coverage may be predetermined. Even when the target coverage is the same, when the target RSUs are different, different target beamforming may be determined for each RSU. For example, beamforming may be a factor for controlling an angle and transmission power of an antenna of the RSU.

In step 350, the server 200 controls the target RSU to cover the target coverage based on the target beamforming. The target RSU may exchange information with vehicles within target coverage through target beamforming.

As the number of operating RSUs among a plurality of RSUs in the RSU control system is dynamically adjusted, power and resources required to manage the plurality of RSUs can be efficiently used.

4 is a flowchart of a method for determining target coverage of an RSU according to an example.

According to one aspect, the step 320 described above with reference to FIG. 3 may include the following steps 410 and 420 .

In step 410, the server 200 determines a target congestion level based on the information about the vehicles. For example, the target congestion level may be determined based on the number of connected vehicles per RSU. For example, when the number of connected vehicles per RSU is less than 10, the target congestion level is determined as the first stage, when less than 20, it is determined as the second stage, and when less than 30, the target congestion level is determined as the third stage. there is.

In step 420 , the server 200 determines a target coverage corresponding to a target congestion level from among the plurality of coverages. For example, when the target congestion level is the first stage, the entire area covered by the RSU control system may be determined as the target coverage. As another example, when the target congestion level is the second stage, 1/2 of the entire area covered by the RSU control system may be determined as the target coverage. As another example, when the target congestion level is the third stage, 1/4 of the entire area covered by the RSU control system may be determined as the target coverage.

After step 420 is performed, in step 330 , the server 200 may determine a target RSU for respectively covering the determined target coverage. For example, when the target congestion level is the third stage and the target coverage is determined to be 1/4 of the entire area, 4 target RSUs for respectively covering the 4 target coverages divided by 1/4 may be determined. As another example, when the target congestion level is the second stage and the target coverage is determined to be 1/2 of the entire area, two target RSUs for respectively covering the two target coverages divided by 1/2 may be determined. As another example, when the target congestion level is the first stage and the target coverage is determined as the entire area, one target RSU for covering the target coverage may be determined.

5 illustrates a target coverage and a target RSU according to an example.

According to one aspect, the RSU control system may manage a plurality of RSUs (510, 520, 530, 540). As the most congested case, when the target congestion level is determined as the third step, for example with reference to FIG. 4 , the target coverages 511 , 512 , 513 , and 514 may be determined so that the entire area is divided by 1/4. A plurality of RSUs 510 , 520 , 530 , 540 may be determined as a target RSU to cover each of the target coverages 511 , 512 , 513 , and 514 . Target beamforming may be determined so that the target RSU covers the target coverage. For example, beamforming of the RSU 510 may be determined such that the RSU 510 covers the target coverage 511 .

6 illustrates a target coverage and a target RSU according to another example.

Following the embodiment described with reference to FIG. 5 , when the target congestion level is determined as the second step, the target coverages 610 and 620 may be determined such that the entire area is divided by half. A plurality of RSUs 520 and 540 may be determined as target RSUs to cover each of the target coverages 610 and 620 . For example, the RSUs 510 and 520 may be preset as a target RSU set for the target coverage 610 , and the RSU 520 may be determined among the RSUs 510 and 520 . Any one of the RSUs 510 and 520 for the target coverage 610 may be exchangedly determined as the target RSU according to a condition.

The beamforming of the RSU 520 may be determined such that the RSU 520 covers the target coverage 610 , and the beamforming of the RSU 540 may be determined such that the RSU 540 covers the target coverage 620 .

7 illustrates a target coverage and a target RSU according to another example.

Following the embodiment described with reference to FIGS. 5 and 6 , when the target congestion level is determined as the first step, the entire area may be determined as the target coverage 710 . The RSU 530 may be determined as the target RSU to cover the target coverage 710 . For example, RSUs 510 , 520 , 530 , 540 may be preset as a target RSU set for the target coverage 710 , and the RSU 530 among the RSUs 510 , 520 , 530 , 540 . can be determined. An RSU that cannot cover the target coverage 710 through beamforming is not included in the target RSU set. For the target coverage 710 , any one of the RSUs 510 , 520 , 530 , and 540 may be interchangeably determined as the target RSU according to a condition.

Beamforming of the RSU 530 may be determined such that the RSU 530 covers the target coverage 710 .

8 is a block diagram of an electronic device of an RSU according to an embodiment.

The electronic device 800 of the RSU includes a communication unit 810 , a processor 820 , and a memory 830 . For example, the electronic device 800 may be included in the RSU described above with reference to FIGS. 1 to 7 .

The communication unit 810 is connected to the processor 820 and the memory 830 to transmit and receive data. The communication unit 810 may be connected to another external device to transmit/receive data.

The communication unit 810 may be implemented as a circuit network in the electronic device 800 . For example, the communication unit 810 may include an internal bus and an external bus. As another example, the communication unit 810 may be an element that connects the electronic device 800 and an external device. The communication unit 810 may be an interface. The communication unit 810 may receive data from an external device and transmit the data to the processor 820 and the memory 830 .

The processor 820 processes data received by the communication unit 810 and data stored in the memory 830 . Processor 820 executes computer readable code (eg, software) stored in memory (eg, memory 830 ) and instructions issued by processor 820 .

The memory 830 stores data received by the communication unit 810 and data processed by the processor 820 . For example, the memory 830 may store a program (or an application, software). The stored program may be a set of syntaxes coded to control the RSU and executable by the processor 820 .

According to one aspect, memory 830 may include one or more of volatile memory, non-volatile memory and RAM, flash memory, hard disk drives, and optical disk drives.

The memory 830 stores an instruction set (eg, software) for operating the electronic device 800 . The instruction set for operating the electronic device 800 is executed by the processor 820 .

The communication unit 810 , the processor 820 , and the memory 830 will be described in detail below with reference to FIG. 9 .

9 is a flowchart of an RSU control method performed by an electronic device according to an embodiment.

According to one aspect, the RSU may not communicate with the server 200 differently from the embodiment described above with reference to FIGS. 1 to 4 . In this case, the RSU may control the RSU by communicating with the neighboring RSU.

In step 910 , the electronic device 800 obtains information on vehicles accessing the RSU. For example, the information on the vehicles includes at least one of the number of vehicles accessing at least one of the plurality of RSUs, the speed of the vehicle, and vehicle handover information between the RSUs, and is not limited to the described embodiment and is not limited to the vehicle may further include information related to the operation of

In step 920 , the electronic device 800 shares information with at least one neighboring RSU adjacent to the RSU. For example, information obtained by RSUs in an RSU group may be shared.

In step 930 , the electronic device 800 determines the target coverage of the RSU for an area including the RSU and the neighboring RSU based on the shared information. The size of the target coverage may vary based on the amount of traffic of the vehicle. If it is determined that the neighboring RSU is operating and the RSU is not operating, there may be no target coverage of the RSU.

The description of how to determine the target coverage of the RSU may be replaced with the description of step 320 .

In operation 940 , the electronic device 800 determines target beamforming for target coverage. The description of the method for determining the target beamforming may be replaced with the description of the step 340 .

In operation 950 , the electronic device 800 controls the RSU to cover target coverage based on target beamforming.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic such as floppy disks. - includes magneto-optical media, and hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Software may comprise a computer program, code, instructions, or a combination of one or more of these, which configures a processing device to operate as desired or is independently or collectively processed You can command the device. The software and/or data may be any kind of machine, component, physical device, virtual equipment, computer storage medium or device, to be interpreted by or to provide instructions or data to the processing device. may be permanently or temporarily embody in The software may be distributed over networked computer systems, and stored or executed in a distributed manner. Software and data may be stored in one or more computer-readable recording media.

As described above, although the embodiments have been described with reference to the limited drawings, those skilled in the art may apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order than the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

200: server
210: communication unit
220: processor
230: memory
800: electronic device
810: communication unit
820: processor
830: memory

Claims (15)

A method of controlling a plurality of RSUs (Road Side Units) performed by a server,
obtaining information on vehicles accessing at least one of the plurality of RSUs, the information on the vehicles including vehicle handover information between RSUs;
determining a target coverage of the RSU based on the information on the vehicles;
determining at least one target RSU among the plurality of RSUs based on the target coverage;
determining target beamforming for the target coverage; and
controlling the target RSU to cover the target coverage based on the target beamforming
containing,
RSU control method.
According to claim 1,
Information about the vehicles,
and a speed of a vehicle connecting to at least one of the plurality of RSUs.
RSU control method.
According to claim 1,
Determining the target coverage of the RSU based on the information on the vehicles,
determining a target congestion level based on the information about the vehicles;
determining the target coverage corresponding to the target congestion level from among a plurality of preset coverages;
containing,
RSU control method.
According to claim 1,
Determining at least one target RSU from among the plurality of RSUs based on the target coverage includes:
Determining the target RSU preset for the target coverage
containing,
RSU control method.
According to claim 1,
Determining whether the current time falls within a preset range
further comprising,
When the current time is included in the range, the target coverage is determined,
RSU control method.
A computer-readable recording medium containing a program for performing the method of any one of claims 1 to 5.
server,
a memory in which a program to control RSU (Road Side Unit) is recorded; and
a processor that executes the program
including,
The program is
obtaining information on vehicles accessing at least one of a plurality of RSUs, the information on the vehicles including vehicle handover information between RSUs;
determining a target coverage of the RSU based on the information on the vehicles;
determining at least one target RSU among the plurality of RSUs based on the target coverage;
determining target beamforming for the target coverage; and
controlling the target RSU to cover the target coverage based on the target beamforming
to do,
server.
8. The method of claim 7,
Determining the target coverage of the RSU based on the information on the vehicles,
determining a target congestion level based on the information about the vehicles; and
determining the target coverage corresponding to the target congestion level from among a plurality of preset coverages;
containing,
server.
8. The method of claim 7,
Determining at least one target RSU from among the plurality of RSUs based on the target coverage includes:
Determining the target RSU preset for the target coverage
containing,
server.
8. The method of claim 7,
The program is
Determining whether the current time falls within a preset range
do more,
When the current time is included in the range, the target coverage is determined,
server.
The RSU control method, performed by the electronic device of the RSU (Road Side Unit),
obtaining information on vehicles accessing the RSU, the information on the vehicles including vehicle handover information between RSUs;
sharing the information with at least one neighboring RSU adjacent to the RSU;
determining a target coverage of the RSU for an area including the RSU and a neighboring RSU based on the information;
determining target beamforming for the target coverage; and
controlling the RSU to cover the target coverage based on the target beamforming
containing,
RSU control method.
12. The method of claim 11,
Information about the vehicles,
Further comprising the speed of the vehicle connecting to the RSU,
RSU control method.
12. The method of claim 11,
Determining the target coverage of the RSU for an area including the RSU and the neighboring RSU based on the information comprises:
determining a target congestion level based on the information about the vehicles; and
determining the target coverage corresponding to the target congestion level from among a plurality of preset coverages;
containing,
RSU control method.
A computer-readable recording medium containing a program for performing the method of any one of claims 11 to 13.
The electronic device of the RSU (Road Side Unit) is,
a memory in which a program for controlling the RSU is recorded; and
a processor that executes the program
including,
The program is
obtaining information on vehicles accessing the RSU, the information on the vehicles including vehicle handover information between RSUs;
sharing the information with at least one neighboring RSU adjacent to the RSU;
determining a target coverage of the RSU for an area including the RSU and a neighboring RSU based on the information;
determining target beamforming for the target coverage; and
controlling the RSU to cover the target coverage based on the target beamforming
to do,
electronic device.

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