C-ITS using Central Road Side Unit and Peripheral Road Side Unit

Abstract

A C-ITS utilizing a central base station and satellite base stations is provided. The C-ITS according to an embodiment of the present invention includes satellite base stations that provide C-ITS services to surrounding vehicles and a central base station that provides C-ITS services to surrounding vehicles and manages surrounding satellite base stations. By classifying C-ITS base stations into central base stations and satellite base stations and assigning specific roles, distributed services and service coverage expansion are possible. Furthermore, by implementing satellite C-ITS base stations in various forms while ensuring they possess only limited functions, they can be manufactured at a low unit cost, thereby improving both usability and economic efficiency.

Description

Technology Field

[0001] The present invention relates to a Cooperative-Intelligent Transport System (C-ITS), and more specifically, to a C-ITS utilizing a central C-ITS base station and a satellite C-ITS base station. Background Technology

[0003] C-ITS is a next-generation intelligent transportation system that provides real-time information on surrounding traffic conditions and hazardous situations, such as sudden braking and falling objects, making it a transportation system centered on user safety rather than road management.

[0004] It is useful in that it can improve safety and mobility by preventing traffic accidents through information sharing based on V2V (vehicle-to-vehicle) and V2I (vehicle-to-infrastructure) communication, and shift the paradigm from road management-centered to user safety-centered.

[0005] However, in C-ITS, base stations have centralized roles, resulting in limited coverage; errors occur in urban areas with many tall buildings; and there are problems such as high unit costs and reduced usability due to these high costs. Prior art literature

[65535] Korean Registered Patent No. 10-2287169 (2021.08.02) Korean Registered Patent No. 10-1568571 (2015.11.05) The problem to be solved

[0007] The present invention has been devised to solve the aforementioned problems, and the objective of the present invention is to provide a C-ITS that can be utilized in the form of an edge node or an independent operation by classifying C-ITS base stations into a central base station and a satellite base station and assigning roles to them. means of solving the problem

[0009] A C-ITS according to one embodiment of the present invention for achieving the above objective includes: satellite base stations that provide C-ITS services to surrounding vehicles; and a central base station that provides C-ITS services to surrounding vehicles and manages surrounding satellite base stations.

[0010] Satellite base stations can provide C-ITS services only to vehicles located within their respective areas. Central base stations can complement the provision of C-ITS services by satellite base stations.

[0011] The central base station sets the operating modes of the satellite base stations and monitors the status of the satellite base stations, and the scope of C-ITS services that the satellite base stations must provide by the central base station can be determined.

[0012] The central base station can complement the provision of C-ITS services based on the status of satellite base stations or road conditions.

[0013] Satellite base stations may include a satellite base station that, upon receiving a Basic Safety Message (BSM) from a vehicle, analyzes the route information contained in the received BSM and transmits traffic safety information only when the vehicle approaches it.

[0014] Satellite base stations may include a satellite base station that contains information displayed on road electronic signs in a message and provides it to surrounding vehicles.

[0015] Satellite base stations may include a satellite base station installed on a traffic light that contains traffic signal information displayed on the traffic light in a message and provides it to surrounding vehicles.

[0016] Satellite base stations may include a satellite base station installed on a traffic sign that contains traffic guidance information displayed on the traffic sign in a message and provides it to surrounding vehicles.

[0017] A C-ITS operation method according to another embodiment of the present invention includes the steps of: satellite base stations providing C-ITS services to surrounding vehicles; a central base station providing C-ITS services to surrounding vehicles; and the central base station managing surrounding satellite base stations.

[0018] A C-ITS base station according to another embodiment of the present invention includes: an acquisition unit that acquires information necessary for providing C-ITS services; a processor that records the information acquired by the acquisition unit in a message; and a communication unit that transmits a message generated by the processor to surrounding vehicles.

[0019] A C-ITS service method according to another embodiment of the present invention includes: a step of obtaining information necessary for providing C-ITS services; a step of recording the information obtained by the obtaining unit in a message; and a step of transmitting the message to surrounding vehicles. Effects of the invention

[0021] As explained above, according to the embodiments of the present invention, by classifying C-ITS base stations into central base stations and satellite base stations and assigning roles to them, distributed services and service coverage expansion become possible.

[0022] In addition, according to embodiments of the present invention, satellite C-ITS base stations can be implemented in various forms and equipped with only limited functions, thereby enabling production at a low unit cost and improving both usability and economic efficiency. Brief explanation of the drawing

[0024] FIG. 1 is an installation diagram of a composite C-ITS according to one embodiment of the present invention, Figure 2 shows a VMS-equipped C-ITS base station, Figures 3 and 4 show a traffic light-equipped C-ITS base station, Figures 5 and 6 show a signboard-mounted C-ITS base station, FIG. 7 is a diagram illustrating the configuration of a C-ITS base station according to another embodiment of the present invention. Specific details for implementing the invention

[0025] The present invention will be described in more detail below with reference to the drawings.

[0026] An embodiment of the present invention presents a hybrid C-ITS utilizing a central C-ITS base station and a satellite C-ITS base station. It is a technology that operates C-ITS base stations by classifying them into a central C-ITS base station and a satellite C-ITS base station.

[0028] 1. Hybrid C-ITS

[0029] FIG. 1 is an installation diagram of a composite C-ITS according to an embodiment of the present invention. As shown in the figure, the composite C-ITS according to an embodiment of the present invention is configured to include a central C-ITS base station (100) and satellite C-ITS base stations (210, 220, 230, 240).

[0030] The central C-ITS base station (100) can function as a general C-ITS base station, while also performing the function of managing C-ITS base stations (210, 220, 230, 240).

[0031] Satellite C-ITS base stations (210, 220, 230, 240) also function as general C-ITS base stations, but they correspond to Edge RSUs (Road Side Units) in that they provide services only to vehicles located within their respective areas. Specifically,

[0032] 1) A satellite C-ITS base station-1 (210) provides C-ITS services to vehicles traveling on the road-1 (10) where it is located, and

[0033] 2) The satellite C-ITS base station-2 (220) provides satellite C-ITS services to vehicles traveling on the road-2 (20) where it is located, and

[0034] 3) The satellite C-ITS base station-3 (230) provides C-ITS services to vehicles traveling on the road-3 (30) where it is located, and

[0035] 4) The satellite C-ITS base station-4 (240) provides C-ITS services to vehicles traveling on the road-4 (40) where it is located.

[0036] Since service provision is provided by satellite C-ITS base stations (210, 220, 230, 240), C-ITS service provision by the central C-ITS base station (100) can be performed in a limited / complementary manner.

[0038] 2. Central C-ITS Base Station

[0039] The central C-ITS base station (100) sets the operating mode of the C-ITS base stations (210, 220, 230, 240) and monitors the status of the C-ITS base stations (210, 220, 230, 240). The central C-ITS base station (100) determines the scope of C-ITS services that the C-ITS base stations (210, 220, 230, 240) must provide.

[0040] Additionally, the central C-ITS base station (100) can supplement the provision of C-ITS services based on the status of C-ITS base stations (210, 220, 230, 240) or road conditions. For example, if C-ITS base station-3 (230) is unable to provide normal C-ITS services, the central C-ITS base station (100) provides C-ITS services to vehicles traveling on Road 3 (30) managed by C-ITS base station-3 (230). As another example, if the status of C-ITS base station-4 (240) is normal but the traffic flow on Road 4 (40) managed by C-ITS base station-4 (240) is high, the central C-ITS base station (100) provides C-ITS services to vehicles traveling on Road 4 (40) to supplement the provision of C-ITS services by C-ITS base station-4 (240).

[0041] To this end, the central C-ITS base station (100) has directional antennas facing each road (10, 20, 30, 04). To minimize the volume of the central C-ITS base station (100), it is preferable to configure the antennas as patch antennas.

[0043] 3. Satellite C-ITS Base Station

[0044] Satellite C-ITS base stations (210, 220, 230, 240) have super-directional antennas so that they can provide C-ITS services only to vehicles traveling on the roads (10, 20, 30, 40) they are responsible for.

[0045] In addition, satellite C-ITS base stations (210, 220, 230, 240) are required to operate at low power because their power supply can be based on batteries. To this end, satellite C-ITS base stations (210, 220, 230, 240) can transmit traffic information such as TIM (Traveler Information Message) and RSA (Road Safety Advice) only when they receive a BSM (Basic Safety Message) from a vehicle while in an idle state.

[0046] Furthermore, satellite C-ITS base stations (210, 220, 230, 240) can analyze route information contained in the received BSM and transmit traffic safety information only when a vehicle approaches them, and not transmit traffic safety information when a vehicle moves away from them.

[0047] At this time, the satellite C-ITS base stations (210, 220, 230, 240) can calculate the distance between themselves and the vehicle through the receiving power of the BSM, etc., and control the transmission power based on the calculated distance.

[0048] Meanwhile, satellite C-ITS base stations (210, 220, 230, 240) may further include solar modules for charging built-in batteries.

[0049] Distributed services through role distribution and segmentation are enabled by satellite C-ITS base stations (210, 220, 230, 240), and service coverage can be expanded within urban areas with many tall buildings.

[0050] The C-ITS service provided by the satellite C-ITS base stations (210, 220, 230, 240) illustrated in FIG. 1 is to transmit traffic information, such as traffic conditions and dangerous situations at intersections, to vehicles. However, such a C-ITS service is merely an example of the services that can be provided by the satellite C-ITS base stations. Various application examples of the satellite C-ITS base stations are presented below.

[0052] 4. C-ITS Base Station Equipped with VMS (Variable Message Signs)

[0053] As shown in Fig. 2, the satellite C-ITS base station is installed in a VMS that functions as a road electronic sign, and can provide information displayed on the VMS to vehicles traveling on the road through a built-in antenna by including the information in the message.

[0054] To this end, a VMS-equipped C-ITS base station is required to acquire display information from the VMS; specifically, the display information can be restored by collecting and analyzing signals used to control the electronic display board to display information.

[0056] 5. Traffic light-equipped C-ITS base station

[0057] A satellite C-ITS base station is installed on a traffic light as shown in FIG. 3 or FIG. 4, and can provide traffic signal information displayed on the traffic light to surrounding vehicles through a built-in antenna by including the information in a message.

[0058] To this end, traffic light-equipped C-ITS base stations are required to acquire traffic signal information from traffic lights, and it is possible to obtain traffic signal information non-contactually from signal lines to control each light source for displaying traffic signals.

[0059] Specifically, by installing non-contact current sensors on the R-signal line for controlling the Red signal, the Y-signal line for controlling the Yellow signal, and the G-signal line for controlling the Green signal, traffic signals can be identified based on the presence or absence of current flow. It is determined that the Red signal light turns on when current is detected on the R-signal line, the Yellow signal light turns on when current is detected on the Y-signal line, and the Green signal light turns on when current is detected on the G-signal line.

[0061] 6. Signboard-mounted C-ITS base station

[0062] As shown in FIG. 5, the signboard-mounted C-ITS base station is installed on a traffic sign and can provide traffic guidance information displayed on the traffic sign to vehicles traveling on the road by including it in a message.

[0063] To this end, the sign-mounted C-ITS base station must store traffic guidance information displayed on traffic signs in advance and have a built-in antenna for message transmission.

[0064] As shown in Fig. 6, the antenna can be implemented as a film-type antenna and attached to the back of the traffic sign, and the C-ITS base station body can also be installed on the back of the traffic sign.

[0066] 7. Standalone C-ITS Base Station

[0067] The aforementioned VMS-equipped C-ITS base station, traffic light-equipped C-ITS base station, signboard-equipped C-ITS base station, etc., can be implemented to operate independently without a central C-ITS base station (100) depending on the installation location.

[0069] 8. C-ITS Base Station Configuration

[0070] FIG. 7 is a diagram illustrating the configuration of a C-ITS base station according to another embodiment of the present invention. As illustrated, the C-ITS base station according to an embodiment of the present invention is configured to include a communication unit (310), a processor (320), a storage unit (330), and an acquisition unit (340).

[0071] The communication unit (310) is configured to communicate wirelessly with surrounding vehicles and base stations, and is a configuration required for all central C-ITS base stations, satellite C-ITS base stations, and standalone C-ITS base stations.

[0072] The processor (320) is configured to perform functions that a C-ITS base station must perform, such as providing C-ITS services and managing satellite C-ITS base stations in the case of a central C-ITS base station, and transmitting traffic information messages in the case of a satellite C-ITS base station and a standalone C-ITS base station.

[0073] The storage unit (330) provides storage space necessary for the performance of services / functions of the processor (320). In the case of a signboard-mounted C-ITS base station, traffic guidance information displayed on the traffic sign is stored in the storage unit (330).

[0074] The acquisition unit (340) is a means for acquiring information necessary for providing C-ITS services from surrounding equipment. In the case of a C-ITS base station equipped with a VMS, the acquisition unit (340) acquires information displayed on the VMS from the VMS, and in the case of a C-ITS base station equipped with a traffic light, the acquisition unit (340) acquires traffic signal information displayed on the traffic light from the traffic light.

[0076] 9. Variation Example

[0077] So far, a hybrid C-ITS utilizing a central C-ITS base station and a satellite C-ITS base station has been described in detail with preferred embodiments.

[0078] In the above embodiment, by dividing the C-ITS base stations into central base stations and satellite base stations and assigning roles to them, distributed services and service coverage expansion were made possible. Additionally, by implementing satellite C-ITS base stations in various forms while having only limited functions, they could be manufactured at a low unit cost, thereby improving both usability and economic efficiency.

[0079] Meanwhile, it goes without saying that the technical concept of the present invention may also be applied to a computer-readable recording medium containing a computer program that enables the device and method according to the present embodiment to perform their functions. Furthermore, the technical concept according to various embodiments of the present invention may be implemented in the form of computer-readable code recorded on a computer-readable recording medium. A computer-readable recording medium may be any data storage device that can be read by a computer and store data. For example, a computer-readable recording medium may be a ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical disk, hard disk drive, etc. Additionally, computer-readable code or a program stored on a computer-readable recording medium may be transmitted through a network connected between computers.

[0080] Furthermore, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above. Various modifications are possible by those skilled in the art without departing from the essence of the invention as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present invention. Explanation of the symbols

[0082] 100 : Central C-ITS Base Station 210, 220, 230, 240: Satellite C-ITS Base Stations

Claims

Claim 1 Satellite base stations providing C-ITS services to surrounding vehicles; It includes a central base station that provides C-ITS services to surrounding vehicles and manages surrounding satellite base stations; wherein the first satellite base station among the satellite base stations provides C-ITS services only to vehicles located in its own area; the central base station provides C-ITS services to vehicles located in the area covered by the satellite base station on behalf of a satellite base station that is unable to provide normal C-ITS services, and supplements the provision of C-ITS services by the satellite base station for a satellite base station that is in a normal state but whose area of ​​traffic flow volume exceeds a standard; the second satellite base station among the satellite base stations, upon receiving a Basic Safety Message (BSM) from a vehicle, analyzes the route information contained in the received BSM and transmits traffic safety information only when the vehicle is approaching it; and the third satellite base station among the satellite base stations is installed on a road electronic display sign and provides surrounding vehicles with information displayed on the road electronic display sign by including it in a message, and collects and analyzes signals for controlling the road electronic display sign to display the information, thereby [determining] the information to be included in the message A C-ITS characterized by restoring, wherein the fourth satellite base station among the satellite base stations is installed on a traffic light and provides traffic signal information displayed on the traffic light to surrounding vehicles by including the information in a message, and determining the traffic signal information by detecting the presence or absence of current flow using non-contact current sensors installed on the signal lines controlling each light source to display the traffic signal on the traffic light. Claim 2 delete Claim 3 delete Claim 4 C-ITS according to claim 1, wherein the central base station sets the operation mode of the satellite base stations and monitors the status of the satellite base stations, and the satellite base stations determine the scope of the C-ITS service to be provided by the central base station. Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 delete Claim 9 C-ITS according to claim 1, wherein the fifth satellite base station is installed on a traffic sign and contains traffic guidance information displayed on the traffic sign in a message and provides it to surrounding vehicles. Claim 10 A step in which satellite base stations provide C-ITS services to surrounding vehicles; a step in which a central base station provides C-ITS services to surrounding vehicles; The method includes the step of a central base station managing surrounding satellite base stations; wherein the first satellite base station among the satellite base stations provides C-ITS services only to vehicles located in the area where it is located; the central base station provides C-ITS services to vehicles located in the area managed by said satellite base station on behalf of a satellite base station that is unable to provide normal C-ITS services, and for a satellite base station that is in a normal state but whose traffic flow volume in the area managed exceeds a standard, it supplements the provision of C-ITS services by said satellite base station; the second satellite base station among the satellite base stations, upon receiving a Basic Safety Message (BSM) from a vehicle, analyzes the route information contained in the received BSM and transmits traffic safety information only when the vehicle is approaching it; the third satellite base station among the satellite base stations is installed on a road electronic display sign and provides surrounding vehicles with information displayed on the road electronic display sign by including it in a message, and restores the information to be included in the message by collecting and analyzing signals to control the road electronic display sign to display the information; and the fourth satellite base station among the satellite base stations A C-ITS operation method characterized by a satellite base station being installed on a traffic light, containing traffic signal information displayed on the traffic light in a message and providing it to surrounding vehicles, and identifying traffic signal information by detecting the presence or absence of current flow using non-contact current sensors installed on signal lines controlling each light source to display traffic signals on the traffic light. Claim 11 delete Claim 12 delete

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