SERVER, COMMUNICATION SYSTEM, METHOD, AND PROGRAM

Abstract

The present disclosure enables the transmission and reception of information between a plurality of devices that communicate using different communication methods. In an embodiment, a reception means (21) receives, from a roadside device, first information transmitted from a moving body using a first wireless communication. An identification means (23) identifies a terminal device located in the vicinity of the moving body that transmitted the first information, on the basis of information about terminal devices managed by an information management means (22). A transmission means (24) transmits, via a second wireless communication, second information generated on the basis of the first information to the terminal device identified by the identification means (23).

Description

[Technical field]

[0001] The present disclosure relates to a server, a communication system, a method, and a computer-readable medium. [Background technology]

[0002] As technology development for vehicle driving assistance and autonomous driving progresses, vehicle-to-vehicle communication and road-to-vehicle communication are becoming widespread as a means to realize safe and efficient traffic. However, during the transitional period, not all vehicles are necessarily equipped with on-board devices with V2V (Vehicle to Vehicle) communication functions. In order to realize safe and efficient traffic, it is required for vehicles with V2V communication functions (hereinafter referred to as V2V-equipped vehicles) to notify information to vehicles without V2V communication functions (hereinafter referred to as non-V2V-equipped vehicles) and for non-V2V-equipped vehicles to notify information to V2V-equipped vehicles.

[0003] As a related technique, Patent Document 1 configures a communication system for performing road-to-vehicle communication. In Patent Document 1, infrastructure such as traffic lights and road signs has a first communication device, a data processing device, and a second communication device. The first communication device performs broadcast communication such as V2X (Vehicle to Everything) communication with a vehicle (on-board communication device). The second communication device performs unicast or multicast communication with a mobile terminal of a pedestrian. The second communication device is configured as a Wi-Fi (registered trademark) communication device or a Bluetooth (registered trademark) communication device.

[0004] In Patent Document 1, a data processing device of the infrastructure acquires position information of pedestrians via a second communication device. The data processing device generates map information (LDM: Local Dynamic Map) in which the position information of multiple pedestrians is integrated. The data processing device transmits the generated map information to an in-vehicle communication device through V2X communication.

[0005] Also, in Patent Document 1, a first communication device of the infrastructure receives a signal notifying an approach of an emergency vehicle from an on-board communication device of the emergency vehicle. The first communication device transmits attention-calling information that an emergency vehicle is passing to an on-board communication device of a general vehicle. Also, the data processing device transmits attention-calling information that an emergency vehicle is passing to a mobile terminal of a pedestrian via a second communication device. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2017-068335 A Summary of the Invention [Problem to be solved by the invention]

[0007] The infrastructure described in Patent Document 1 can transmit location information received from pedestrians' mobile devices to vehicles around the infrastructure through V2X communication, which is broadcast communication. In addition, when the infrastructure receives a signal from an emergency vehicle through V2X communication, it can transmit attention-calling information to the mobile devices of pedestrians around the infrastructure.

[0008] However, in Patent Document 1, the second communication device of the infrastructure can only communicate with mobile terminals that are within the communication range of the second communication device. Therefore, even if a pedestrian is in the immediate vicinity of the vehicle, if the pedestrian is in a location away from the location where the second communication device is installed (e.g., an intersection), the second communication device may not be able to receive location information from the pedestrian's mobile terminal and may not be able to notify the vehicle of the pedestrian's location. In addition, even if the pedestrian is in a location where it can receive V2X communication from an emergency vehicle, if the pedestrian is outside the communication range of the second communication device, the pedestrian's mobile terminal cannot receive the attention alert information.

[0009] In view of the above circumstances, an object of the present disclosure is to provide a server, a communication system, a method, and a computer-readable medium that enable transmission and reception of information between multiple devices that use different communication methods. [Means for solving the problem]

[0010] In order to achieve the above object, the present disclosure provides a server as a first aspect. The server according to the first aspect includes a receiving means for receiving, from a roadside unit, first information transmitted from a mobile body using a first wireless communication, an information management means for managing information of a terminal device having a function of performing a second wireless communication, an identifying means for identifying the terminal device located in the vicinity of the mobile body that transmitted the first information based on the information of the terminal device managed by the information management means, and a transmitting means for transmitting, via the second wireless communication, second information generated based on the first information to the terminal device identified by the identifying means.

[0011] The present disclosure provides a server as a second aspect. The server according to the second aspect includes a receiving means for receiving first information from a terminal device having a function of performing first wireless communication via the first wireless communication, an information management means for managing information of a roadside device that communicates with a mobile body using a second wireless communication, an identifying means for identifying the roadside device located in the vicinity of the terminal device that transmitted the first information based on the information of the roadside device managed by the information management means, and a transmitting means for transmitting second information generated based on the first information to the roadside device identified by the identifying means, and causing the roadside device to transmit the second information to the mobile body using the second wireless communication.

[0012] The present disclosure provides a communication system as a third aspect. The communication system according to the third aspect includes a roadside device that communicates with a mobile object using a first wireless communication, and a server. The roadside device has a receiving means for receiving first information transmitted from the mobile object using the first wireless communication, and a transmitting means for transmitting the received first information to the server. The server has a receiving means for receiving the first information from the roadside device, an information management means for managing information of a terminal device having a function of performing a second wireless communication, an identifying means for identifying the terminal device located in the vicinity of the mobile object that transmitted the first information based on the information of the terminal device managed by the information management means, and a transmitting means for transmitting second information generated based on the first information to the terminal device identified by the identifying means via the second wireless communication.

[0013] The present disclosure provides a communication system as a fourth aspect. The communication system according to the fourth aspect includes a server that communicates with a terminal device using a first wireless communication, and a roadside unit that communicates with a mobile object using a second wireless communication. The server includes a receiving means for receiving first information from the terminal device via the first wireless communication, an information management means for managing information about the roadside unit, an identifying means for identifying the roadside unit located in the vicinity of the terminal device that transmitted the first information based on information about the roadside unit managed by the information management means, and a transmitting means for transmitting second information generated based on the first information to the roadside unit identified by the identifying means. The roadside unit includes a receiving means for receiving the second information from the server, and a transmitting means for transmitting the received second information to the mobile object using the second wireless communication.

[0014] The present disclosure provides a communication method as a fifth aspect. The communication method according to the fifth aspect includes receiving, from a roadside device, first information transmitted from a mobile body using a first wireless communication, identifying the terminal device located in the vicinity of the mobile body that transmitted the first information based on information of the terminal device having a function of performing a second wireless communication, and transmitting, to the identified terminal device, second information generated based on the first information, via the second wireless communication.

[0015] The present disclosure provides a communication method as a sixth aspect. The communication method according to the sixth aspect includes receiving first information from a terminal device having a function of performing first wireless communication via the first wireless communication, identifying a roadside device located near the terminal device that transmitted the first information based on information of the roadside device that communicates with a mobile body using a second wireless communication, transmitting second information generated based on the first information to the identified roadside device, and causing the roadside device to transmit the second information to the mobile body using the second wireless communication.

[0016] The present disclosure provides, as a seventh aspect, a computer-readable medium, which stores a program for causing a computer to execute a process of receiving, from a roadside unit, first information transmitted from a mobile body using a first wireless communication, identifying the terminal device located in the vicinity of the mobile body that transmitted the first information based on information of the terminal device having a function of performing a second wireless communication, and transmitting, to the identified terminal device, second information generated based on the first information, via the second wireless communication.

[0017] The present disclosure provides a computer-readable medium as an eighth aspect. The computer-readable medium according to the eighth aspect stores a program for causing a computer to execute a process of receiving first information from a terminal device having a function of performing first wireless communication via the first wireless communication, identifying a roadside device located in the vicinity of the terminal device that transmitted the first information based on information of the roadside device that communicates with a mobile body using a second wireless communication, transmitting second information generated based on the first information to the identified roadside device, and causing the roadside device to transmit the second information to the mobile body using the second wireless communication. Effect of the Invention

[0018] The server, communication system, method, and computer-readable medium according to the present disclosure can enable transmission and reception of information between a plurality of devices using different communication methods. [Brief description of the drawings]

[0019] [Figure 1] 1 is a block diagram showing a schematic configuration of a communication system according to the present disclosure. [Diagram 2] FIG. 2 is a block diagram showing a schematic configuration example of a roadside unit in the communication system according to the present disclosure. [Diagram 3] FIG. 2 is a block diagram showing a schematic configuration example of a server according to the present disclosure. [Figure 4] 1 is a block diagram showing a communication system according to a first embodiment of the present disclosure. [Diagram 5] FIG. 1 is a block diagram showing an example of the configuration of an MEC server. [Figure 6] 5 is a flowchart showing an operation procedure of the MEC server in the first embodiment. [Figure 7] FIG. 5 is a block diagram showing a communication system in a different aspect from that shown in FIG. 4. [Figure 8] FIG. 11 is a block diagram showing a communication system according to a second embodiment of the present disclosure. [Figure 9] 10 is a flowchart showing an operation procedure of an MEC server in the second embodiment. [Figure 10] FIG. 1 is a block diagram showing an example of the configuration of a computer device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Prior to describing the embodiments of the present disclosure, an overview of the present disclosure will be described. Fig. 1 shows a schematic configuration of a communication system according to the present disclosure. The communication system 10 includes a server 20 and a roadside unit 40. The roadside unit 40 communicates with a mobile object 30 using a predetermined wireless communication. The server 20 communicates with a terminal device 50 via wireless communication that is different from the communication method used by the roadside unit 40.

[0021] The server 20 receives the first information transmitted from the mobile object 30 or the first information transmitted from the terminal device 50. When the server 20 receives the first information from the mobile object 30, the server 20 transmits second information based on the first information to the terminal device 50. When the terminal device 50 transmits the first information, the server 20 transmits second information based on the first information to the roadside device 40, and causes the roadside device 40 to transmit the second information to the mobile object 30.

[0022] In the following description, when the first information is transmitted from the mobile object 30, the wireless communication used in the communication between the mobile object 30 and the roadside unit 40 is referred to as the first wireless communication. Also, the wireless communication used in the communication between the server 20 and the terminal device 50 is referred to as the second wireless communication. When the first information is transmitted from the terminal device 50, the wireless communication used in the communication between the server 20 and the terminal device 50 is referred to as the first wireless communication. Also, the wireless communication used in the communication between the mobile object 30 and the roadside unit 40 is referred to as the second wireless communication.

[0023] 2 shows a schematic configuration example of a roadside device. The roadside device 40 has a receiving means 41 and a transmitting means 42. When the first information is transmitted from the mobile object 30, the receiving means 41 receives the first information from the mobile object 30 using the first wireless communication. When the transmitting means 42 receives the first information from the mobile object 30, it transmits the first information to the server 20.

[0024] When first information is transmitted from the terminal device 50, the receiving means 41 receives second information generated based on the first information from the server 20. The transmitting means 42 transmits the second information received from the server 20 to the mobile object 30 using the second wireless communication.

[0025] 3 shows a schematic configuration example of the server 20. The server 20 has a receiving means 21, an information management means 22, a specifying means 23, and a transmitting means 24. Below, the operation (function) of each part of the server 20 will be explained separately for a case where the first information is transmitted from the mobile object 30 and a case where the first information is transmitted from the terminal device 50.

[0026] First, the operation of each part of the server 20 when the first information is transmitted from the mobile object 30 will be described. The roadside device 40 receives the first information transmitted from the mobile object 30 using the first wireless communication, and transmits the received first information to the server 20. The receiving means 21 receives the first information from the roadside device 40. The information management means 22 manages the information of the terminal device 50. The identifying means 23 identifies the terminal device 50 located in the vicinity of the mobile object 30 that transmitted the first information, based on the information of the terminal device 50 managed by the information management means 22. The transmitting means 24 transmits the second information generated based on the first information to the terminal device 50 identified by the identifying means 23, using the second wireless communication.

[0027] In the present disclosure, when first information is transmitted from a mobile object 30, the server 20 (identification means 23) identifies the terminal device 50 located in the vicinity of the mobile object 30 that transmitted the first information, using information on the terminal device 50 managed by the information management means 22. The transmission means 24 transmits the second information to the identified terminal device 50 located in the vicinity of the mobile object 30. In this case, the server 20 can transmit the second information to the terminal device 50 that is considered to have received the first information from the mobile object 30, assuming that the terminal device 50 is a device compatible with the first wireless communication. In this way, the communication system 10 according to the present disclosure can transmit and receive information between the mobile object 30 and the terminal device 50 that have different communication methods.

[0028] The first wireless communication may be wireless communication of a broadcast type performed between one or more mobile bodies 30 and one or more roadside units 40. The first wireless communication may be direct communication, which is a type of wireless communication of a broadcast type, in which the mobile bodies 30 can directly communicate with each other and between the mobile body 30 and the roadside unit 40, without going through a relay device such as a base station. The second wireless communication may be wireless communication of a unicast type. The second wireless communication may be indirect communication, which is a type of wireless communication of a unicast type, in which communication is performed through a relay device such as a base station.

[0029] Next, the operation of each part of the server 20 when the first information is transmitted from the terminal device 50 will be described. The receiving means 21 receives the first information transmitted from the terminal device 50 using the first wireless communication. The information management means 22 manages the information of the roadside device 40. The identifying means 23 identifies the roadside device 40 located in the vicinity of the terminal device 50 that transmitted the first information, based on the information of the roadside device 40 managed by the information management means 22. The transmitting means 24 transmits second information generated based on the first information to the roadside device 40 identified by the identifying means 23, and causes the roadside device 40 to transmit the second information to the mobile object 30 using the second wireless communication.

[0030] In the present disclosure, when the terminal device 50 transmits the first information, the server 20 (identification means 23) identifies the roadside device 40 located in the vicinity of the mobile object 30 that transmitted the first information, using the information of the roadside device 40 managed by the information management means 22. The transmission means 24 transmits the second information to the identified roadside device 40 located in the vicinity of the terminal device 50, and causes the roadside device 40 to transmit the second information to the mobile object 30. In this case, the server 20 can transmit the second information to the mobile object 30 that is considered to have received the first information if it is assumed that the terminal device 50 is a device compatible with the second wireless communication. In this way, the communication system 10 according to the present disclosure can transmit and receive information between the mobile object 30 and the terminal device 50 that have different communication methods.

[0031] The first wireless communication may be unicast wireless communication. The first wireless communication may be indirect communication among unicast wireless communication, in which communication is performed via a relay device such as a base station. The second wireless communication may be broadcast wireless communication performed between one or more mobile objects 30 and one or more roadside units 40. The second wireless communication may be direct communication among broadcast wireless communication, in which mobile objects 30 can directly communicate with each other and between a mobile object 30 and a roadside unit 40 without going through a relay device such as a base station.

[0032] Hereinafter, embodiments of the present disclosure will be described in detail. Note that the following description and drawings are omitted or simplified as appropriate for clarity of explanation. In addition, in each of the following drawings, the same elements or corresponding elements are given the same reference numerals, and duplicate explanations are omitted as necessary.

[0033] Fig. 4 shows a communication system according to the first embodiment of the present disclosure. The communication system 100 includes a MEC (Mobile / Multi-access Edge Computing) server 110, a roadside unit (RSU: Roadside Unit) 130, and a base station 150. The communication system 100 corresponds to the communication system 10 shown in Fig. 1. The MEC server 110 corresponds to the server 20 shown in Fig. 1. The roadside unit 130 corresponds to the roadside unit 40 shown in Fig. 1. This embodiment is an embodiment in which V2V information transmitted from a moving object is transmitted to a terminal device.

[0034] The roadside unit 130 is a wireless communication device that performs wireless communication with a mobile unit 210A (mobile unit A) and a mobile unit 210B (mobile unit B). The roadside unit 130 may be installed on road facilities such as traffic lights. In the following description, the mobile units 210A and 210B are also collectively referred to as mobile units 210 unless a distinction is particularly required. The mobile unit 210 corresponds to the mobile unit 30 shown in FIG. 1.

[0035] Each moving object 210 and the roadside device 130 is equipped with a communication device capable of wireless communication with each other. The moving object 210 is configured as a land vehicle such as an automobile, a bus, a taxi, a truck, an AGV (Automatic Guided Vehicle), or an AMV (Autonomous Mobile Robot). The moving object 210 may also be configured as an aircraft such as a drone.

[0036] Broadcast-type wireless communication (first wireless communication) is performed between the roadside unit 130, the mobile unit 210A, and the mobile unit 210B. For example, each mobile unit 210 can broadcast V2V information using PC5 direct communication, which is one of wireless communication interfaces in the communication standards of LTE (Long Term Evolution) and 5G (5th generation), as the first wireless communication. As another example, each mobile unit 210 may broadcast V2V information using DSRC (Dedicated Short Range Communications) communication. In FIG. 4, a radio wave mark represented by three lines indicates the first wireless communication. When the mobile unit 210A broadcasts V2V information, other mobile units 210 and the roadside unit 130 that exist in the communication range 131 of the mobile unit 210A can receive the V2V information. For example, in FIG. 4, the roadside unit 130 and the mobile unit 210B each receive the V2V information broadcast from the mobile unit 210A. The communication between the roadside unit 130 and the mobile object 210 is also called V2V communication or V2I (Vehicle to Infrastructure) communication.

[0037] The base station 150 performs wireless communication (second wireless communication) with each of the terminal device 220A (terminal device A), the terminal device 220B (terminal device B), and the roadside device 130 that are present within the communication range 151 of the base station. In FIG. 4, a lightning mark indicates the second wireless communication. The base station 150 may be a base station in a wireless communication network that uses a communication standard such as LTE, LTE-Advanced, or 5G. The base station 150 is connected to a core network 170. The core network 170 is also called EPC (Evolved Packet Core) in the case of LTE or LTE-Advanced, and 5GC (5th Generation Core network) in the case of 5G.

[0038] The second wireless communication may be Uu communication, for example, when based on the communication standard of LTE, LTE-Advanced, or 5G. Unicast communication is performed between the MEC server 110 and the terminal device 220A, the terminal device 220B, and the roadside device 130 via Uu communication by the base station 150. The Uu communication is an indirect communication method in which communication is performed via the base station 150. The roadside device 130 does not necessarily need to be connected to the MEC server 110 via the base station 150 (via Uu communication). The roadside device 130 may be connected to the MEC server 110 by any means, such as a wired line or a wireless line, without the base station 150.

[0039] The terminal devices 220A and 220B are configured as terminal devices having a communication function by the second wireless communication, for example, carried by a person riding in the vehicle. The terminal devices 220A and 220B may be configured as devices attached to the vehicle. In the following, when no particular distinction is required, the terminal devices 220A and 220B are also collectively referred to as the terminal device 220. The terminal device 220 corresponds to the terminal device 50 shown in FIG. 1. Examples of the terminal device 220 include devices such as a smartphone, a tablet, and a notebook PC (Personal Computer). Examples of the terminal device 220 may also include devices such as a car navigation system. In the following description, the terminal device 220 is described as not supporting a communication function by the first wireless communication. In the following description, the terminal device 220 is described as not supporting a communication function by the first wireless communication. In other words, the terminal device 220 is not able to receive the V2V information transmitted from the moving object 210 using the first wireless communication using the first wireless communication.

[0040] 4 shows one each of the MEC server 110, the roadside unit 130, and the base station 150, but the numbers of the MEC servers 110, the roadside units 130, and the base stations 150 in the communication system 100 are not particularly limited. The communication system 100 may include a plurality of MEC servers 110. The communication system 100 may include a plurality of roadside units 130. The communication system 100 may also include a plurality of base stations 150.

[0041] In this embodiment, the server is configured as an MEC server 110 arranged in association with the base station 150. The MEC server 110 does not necessarily have to be configured as a server associated with the base station 150. For example, the MEC server 110 may be installed in a predetermined area unit, not in a base station unit. Alternatively, the MEC server 110 may be installed in association with the roadside unit 130. Alternatively, the MEC server 110 (its functions) may be realized as the roadside unit 130 (its functions). Furthermore, in the communication system 100, a server connected to the core network 170 (a server on the cloud) may be used instead of the MEC server 110.

[0042] When the roadside device 130 receives V2V information (first information) from the mobile object 210, the roadside device 130 transmits the received first information to the MEC server 110. Here, the first information transmitted from the roadside device 130 to the MEC server 110 may not be exactly the same as the V2V information received from the mobile object 210. The first information transmitted from the roadside device 130 to the MEC server 110 may be information obtained by processing the V2V information so as to be compatible with processing in the terminal device 220. The MEC server 110 (server) receives the V2V information from the roadside device 130. The MEC server 110 identifies the terminal device 220 located in the vicinity of the mobile object 210 that transmitted the V2V information. The "periphery of the mobile object" means, for example, a range within a predetermined distance from the mobile object 210. The MEC server 110 transmits second information based on the V2V information to the identified terminal device 220 via the base station 150. In this embodiment, the second information may be the same as the V2V information transmitted from the moving object 210, or may be information including a part of the V2V information. Furthermore, the second information may be information obtained by processing the V2V information so as to be compatible with processing in the terminal device 220. The information obtained by processing the V2V information so as to be compatible with processing in the terminal device 220 may be generated by either the MEC server 110 or the roadside device 130. The second information transmitted from the MEC server 110 to the terminal device 220 may be the same as the information received by the MEC server 110 from the roadside device 130.

[0043] 5 shows a configuration example of the MEC server 110. The MEC server 110 has an information receiving unit 111, a location information managing unit 112, an identifying unit 113, and an information transmitting unit 114. The MEC server 110 is configured, for example, as a computer device (server device) having a processor and a memory. At least a part of the function of each unit of the MEC server 110 can be realized by the processor operating in accordance with a program read from the memory.

[0044] The information receiving unit 111 receives, from the roadside unit 130, the V2V information that the roadside unit 130 has received from the mobile unit 210. The location information management unit 112 manages information on the terminal device 220. The information on the terminal device 220 includes, for example, location information and communication address information of the terminal device 220. For example, the location information management unit 112 can acquire the location information and communication address information of the terminal device 220 from an application installed in the terminal device 220 periodically or by triggering a predetermined event. The predetermined event here may be at least one of the arrival of a predetermined time, movement of a predetermined distance or more, change of a base station or cell to be connected (handover), change of a communication address, and a request from the location information management unit 112. Alternatively, the location information management unit 112 may acquire the location information and communication address information of the terminal device 220 from another device that manages the location information and communication address information of the terminal device 220. The other device may be, for example, a core network device of LTE or 5G. Specifically, the location information and communication address information of the terminal device 220 may be acquired from a network device or network function that manages subscriber information and mobility management, such as a Home Subscriber Server (HSS) or Mobility Management Entity (MME) in LTE, or a Unified Data Management (UDM) or Access and Mobility Management Function (AMF) in 5G. Alternatively, the location information and communication address information of the terminal device 220 may be acquired via a Network Exposure Function (NEF) that has a function of exposing functions and information in the 5G system to the outside of the 5G system. The information receiving unit 111 corresponds to the receiving means 21 shown in FIG. 3. The location information managing unit 112 corresponds to the information managing means 22 shown in FIG. 3.

[0045] The identification unit 113 identifies a terminal device located in the vicinity of the mobile body 210 that transmitted the V2V information, based on the information of the terminal device 220 managed by the position information management unit 112. The identification unit 113, for example, identifies one or more terminal devices 220 that exist within a predetermined range from the mobile body 210 that transmitted the V2V information, as terminal devices located in the vicinity of the mobile body 210. Here, the predetermined range may be, for example, a range within a predetermined distance from the position of the mobile body 210 that transmitted the V2V information as a base point. Alternatively, the predetermined range may be a range (communicable range of V2V communication) in which the broadcasted V2V information can be received from the mobile body 210 that transmitted the V2V information as a base point. For example, the identification unit 113 may set a range within a predetermined distance from the position of the mobile body 210 as a communicable range of V2V communication. Alternatively, the identification unit 113 may use a radio wave propagation analysis method such as a ray tracing method to obtain a range in which radio waves radiated from the position of the moving body 210 can be received with a predetermined reception power or more, and may set the obtained range as the communication range of the V2V communication. Alternatively, the identification unit 113 may measure the reception power distribution in advance when each point is a radio wave transmission point, and may use the measurement result to obtain the communication range of the V2V communication. In this case, the identification unit 113 may use the measurement result at the radio wave transmission point closest to the position of the moving body 210. Alternatively, the identification unit 113 may use map information including information on topography, land features, roads, etc., to distinguish between places within the line of sight (LOS) and places outside the line of sight (NLOS) from the position of the moving body 210. The identification unit 113 may use the identification result to obtain the communication range of the V2V communication. In any of the above methods, the identification unit 113 may further consider the antenna height and transmission power of the moving body 210 used for V2V communication. The position of the moving body 210 that transmitted the V2V information may be determined based on, for example, an image of a camera installed at a traffic light or a surveillance camera that can capture a road. Alternatively, the position of the moving body 210 that transmitted the V2V information may be determined from position information included in the transmitted V2V information.Alternatively, the identifying unit 113 may use the position information of the roadside unit 130 that received the V2V information instead of the position of the mobile object 210 that transmitted the V2V information. That is, the identifying unit 113 may approximately acquire the position of the mobile object 210 that transmitted the V2V information by using the position information of the roadside unit 130 that received the V2V information. The identifying unit 113 corresponds to the identifying means 23 shown in FIG. 3.

[0046] The information transmitting unit 114 transmits second information generated based on the V2V information (first information) to the terminal device 220 identified by the identifying unit 113. The information transmitting unit 114 acquires communication address information of the identified terminal device 220 from the position information managing unit 112, and transmits the second information to the identified terminal device 220 using the acquired communication address information. The information transmitting unit 114 corresponds to the transmitting means 24 shown in FIG. 3.

[0047] Next, the operation procedure will be described. Fig. 6 shows the operation procedure (communication method) in the MEC server 110. When the mobile object 210 broadcasts V2V information, the roadside device 130 receives the V2V information transmitted from the mobile object 210 using V2V communication (first wireless communication) and transmits the received V2V information to the MEC server 110. The information receiving unit 111 of the MEC server 110 receives the V2V information (first information) transmitted from the mobile object 210 from the roadside device 130 (step A1). The identifying unit 113 identifies the terminal device 220 located in the vicinity of the mobile object 210 that transmitted the V2V information, using the position information of the terminal device 220 managed by the position information managing unit 112 (step A2). The information transmitting unit 114 transmits the second information generated based on the V2V information received in step A1 via the base station 150 to the terminal device 220 identified in step A2 via a second wireless communication (Uu communication) (step A3).

[0048] For example, in Fig. 4, the mobile body 210A broadcasts V2V information. The mobile body 210B and the roadside unit 130 that are present in the communication range 131 of the mobile body 210A receive the V2V information broadcast from the mobile body 210A. The roadside unit 130 transmits the V2V information received from the mobile body 210A to the MEC server 110. Note that in Fig. 4, the terminal device 220A is present within the communication range 131 of the mobile body 210A, but is a terminal that does not support V2V communication, and therefore cannot receive the V2V information broadcast from the mobile body 210A.

[0049] In the MEC server 110, the information receiving unit 111 receives the V2V information transmitted from the mobile object 210 from the roadside device 130. The identifying unit 113 identifies the terminal device located in the vicinity of the mobile object 210A based on the position information of the terminal device 220 managed by the position information managing unit 112. For example, the identifying unit 113 identifies the terminal device 220A located within the communication range 131 of the mobile object 210A as the terminal device located in the vicinity of the mobile object 210A. The information transmitting unit 114 transmits the V2V information received from the roadside device 130 to the terminal device 220A using Uu communication of the base station 150.

[0050] In this embodiment, the terminal device 220 located around the moving body 210 that transmitted the V2V information is identified, and information generated based on the V2V information is transmitted to the identified terminal device 220. In the example of FIG. 4, the terminal device 220B exists within the communication range 151 of the base station 150, but exists outside the communication range 131 of the moving body 210A. Therefore, the identification unit 113 does not identify the terminal device 220B as a terminal device located in the vicinity of the moving body 210A. In this case, the information transmission unit 114 does not transmit the information generated based on the V2V information to the terminal device 220B. Therefore, this embodiment can suppress information transmission to the terminal device 220 located at a position away from the moving body 210.

[0051] Fig. 7 shows a communication system in a different aspect from that of Fig. 4. In Fig. 7, the communication range 131 of a mobile unit 210A spans a communication range 151A of a base station 150A (base station A) and a communication range 151B of a base station 150B (base station B). In Fig. 7, a terminal device 220A exists within the communication range 131 of the mobile unit 210A and within the communication range 151A of the base station 150A. In Fig. 7, a terminal device 220B exists within the communication range 131 of the mobile unit 210A and within the communication range 151B of the base station 150B. In Fig. 7, the core network 170 (see Fig. 4) is omitted.

[0052] In the above case, the identification unit 113 of the MEC server 110 identifies the terminal device 220A and the terminal device 220B as terminal devices located in the vicinity of the mobile body 210A that transmitted the V2V information. The information transmission unit 114 transmits information generated based on the V2V information transmitted by the mobile body 210A to the terminal device 220A via the second wireless communication by the base station 150A. In addition, the information transmission unit 114 transmits information generated based on the V2V information transmitted by the mobile body 210A to the terminal device 220B via the base station 150B. As in this example, in this embodiment, even if the communication range of the V2V communication spans multiple base stations 150, the information generated based on the V2V information transmitted by the mobile body 210 can be transmitted to the terminal devices 220A and 220B located in the vicinity of the mobile body 210A via Uu communication.

[0053] The terminal device 220 may request the MEC server 110 to transmit the second information and receive the second information as a response to the request. For example, when the terminal device 220 desires to receive V2V information, the terminal device 220 transmits a transmission request for V2V information to the MEC server 110. This transmission request may include communication address information of the terminal device 220 and location information of the terminal device 220. As an example, the identification unit 113 of the MEC server 110 may compare the location information of the moving object 210 that transmitted the V2V information (acquired V2V information) received during a predetermined period (for example, 1 second, 5 seconds, 10 seconds, etc.) before the relevant time with the location information included in the transmission request, and identify the acquired V2V information to be notified to the terminal device 220 that transmitted the transmission request. This identification may be performed based on whether or not the location information of the terminal device 220 is included within a predetermined range from the moving object 210 that transmitted the V2V information. The information transmission unit 114 may transmit the identified acquired V2V information to the terminal device 220 using the communication address information of the terminal device 220 included in the transmission request. At this time, when there are a plurality of identified acquired V2V information, each may be transmitted to the terminal device 220 as a separate message, or may be transmitted to the terminal device 220 as one message. In this way, when the communication address information and the position information of the terminal device 220 are included in the transmission request, the position information management unit 112 does not need to manage the communication address information and the position information of the terminal device 220. As another example, when the terminal device 220 that transmitted the transmission request is included in the terminal device 220 identified in step A2, the information transmission unit 114 of the MEC server 110 may transmit the V2V information to the terminal device 220 that transmitted the transmission request. In that case, the information transmission unit 114 can know the communication address information of the terminal device 220 using the received transmission request. For this reason, the position information management unit 112 does not need to manage the communication address information of the terminal device 220.

[0054] In this embodiment, the identification unit 113 identifies the terminal device 220 located in the vicinity of the mobile body 210 that transmitted the V2V information. The information transmission unit 114 transmits information generated based on the received V2V information to the terminal device 220 located in the vicinity of the identified mobile body 210 that transmitted the V2V information. In this manner, even if the terminal device 220 does not support the first wireless communication and cannot directly receive the V2V information from the mobile body 210 using, for example, PC5 direct communication, the terminal device 220 can receive the information generated based on the V2V information from the MEC server 110 via the second wireless communication (for example, Uu communication) by the base station 150.

[0055] Next, a second embodiment of the present disclosure will be described. Fig. 8 shows a communication system according to the second embodiment of the present disclosure. In this embodiment, a communication system 100a has a MEC server 110, a roadside unit 130A (roadside unit A), a roadside unit 130B (roadside unit B), and a base station 150. The roadside units 130A and 130B correspond to the roadside unit 130 shown in Fig. 4. This embodiment is an embodiment in which information transmitted from a terminal device 220 is transmitted to a mobile object 210.

[0056] In this embodiment, the configuration of the MEC server 110 may be the same as the configuration of the MEC server 110 described in the first embodiment shown in FIG. 5. In this embodiment, the information receiving unit 111 receives the first information from the terminal device 220 via a first wireless communication, for example, Uu communication provided by the base station 150. The first information may be, for example, information of a moving object having the terminal device 220. Specifically, the first information may be V2V information or information equivalent thereto when the moving object is a vehicle, or V2P (Vehicle-to-Pedestrian) information or information equivalent thereto when the moving object is a person. The first information may include at least one of position information, speed information, acceleration information, moving object attributes, and time information regarding the moving object having the terminal device 220. The moving object attributes are information indicating the type of the moving object, and include, for example, information such as "automobile" and "pedestrian".

[0057] The location information management unit 112 manages information on the roadside unit 130. The information on the roadside unit 130 includes location information on the roadside units 130A and 130B. The information on the roadside unit 130 also includes communication address information of the roadside unit 130 used in communication between the MEC server 110 and the roadside unit 130. The identification unit 113 identifies the roadside unit 130 located in the vicinity of the terminal unit 220 that transmitted the first information, based on the location information of the terminal unit 220 included in the first information transmitted from the terminal unit 220 and the information on the roadside unit 130 managed by the location information management unit 112. Here, the "periphery of the terminal unit" means, for example, a range within a predetermined distance from the terminal unit 220.

[0058] The identification unit 113, for example, identifies one or more roadside units 130 existing within a predetermined range from the terminal device 220 that transmitted the first information as roadside units located in the vicinity of the terminal device 220. Here, the predetermined range may be a range within a predetermined distance from the terminal device 220, or may indicate a range in which the terminal device 220 can receive the first information assuming that the terminal device 220 transmits the first information using the second wireless communication (for example, PC5 direct communication) (communication range of V2V communication). In addition, the identification unit 113 may identify the roadside unit 130 that is closest to the terminal device 220 that transmitted the first information as the roadside unit 130 located in the vicinity of the terminal device 220. The position of the terminal device 220 that transmitted the first information can be determined using, for example, position information included in the first information. Alternatively, the position information of the terminal device 220 may be managed in the position information management unit 112 as in the first embodiment. In this case, the identification unit 113 may acquire the location information of the terminal device 220 that transmitted the first information and the location information of the roadside device 130 from the location information management unit 112, and identify the roadside devices located in the vicinity of the terminal device 220.

[0059] The information transmission unit 114 transmits the second information generated based on the first information to the roadside device 130 identified by the identification unit 113. In this embodiment, the second information may be the same as the first information transmitted from the terminal device 220, or may be information obtained by processing the first information so as to be compatible with processing in the mobile unit 210. The roadside device 130 transmits the second information received from the information transmission unit 114 using the second wireless communication, for example, PC5 direct communication. The mobile unit 210 present within the communication range of the second wireless communication by the roadside device 130 can receive the second information transmitted from the roadside device 130. Note that the communication address information of the roadside device 130 identified by the identification unit 113 can be acquired from the location information management unit 112.

[0060] Next, the operation procedure in this embodiment will be described. FIG. 9 shows the operation procedure of the MEC server 110. The information receiving unit 111 receives the first information transmitted from the terminal device 220 using the first wireless communication, for example, Uu communication, via the base station 150 (step B1). The identifying unit 113 identifies the roadside device 130 located in the vicinity of the terminal device 220 that transmitted the first information, based on the information (location information) of the roadside device 130 managed by the location information managing unit 112 (step B2). The information transmitting unit 114 transmits the second information to the roadside device identified by the identifying unit 113 (step B3). The roadside device 130 transmits the second information using the second wireless communication, for example, PC5 direct communication. The mobile object 210 present within the communication range of the second wireless communication by the roadside device 130 can receive the second information from the roadside device 130.

[0061] For example, in FIG. 8, it is assumed that the terminal device 220A transmits information (first information) equivalent to V2V information using Uu communication. In this case, the information receiving unit 111 of the MEC server 110 receives the V2V information transmitted from the terminal device 220A via the base station 150. The identifying unit 113 identifies the roadside device 130A as a roadside device located in the vicinity of the terminal device 220A. The information transmitting unit 114 transmits the V2V information (second information) to the roadside device 130A. The roadside device 130A broadcasts the V2V information using PC5 direct communication. In this way, the MEC server 110 can transmit the V2V information to the moving object 210A present in the vicinity of the terminal device 220A.

[0062] Also, in FIG. 8, it is assumed that the terminal device 220B transmits the first information using Uu communication. In this case, the information receiving unit 111 of the MEC server 110 receives the first information transmitted from the terminal device 220B via the base station 150. The identifying unit 113 identifies the roadside device 130B as a roadside device located in the vicinity of the terminal device 220B. The information transmitting unit 114 transmits the second information to the roadside device 130B. The roadside device 130B broadcasts the second information using PC5 direct communication. In this way, the MEC server 110 can transmit the second information to the moving object 210B present in the vicinity of the terminal device 220B.

[0063] In this embodiment, the identification unit 113 identifies the roadside device 130 located in the vicinity of the terminal device 220 that transmitted the first information using the first wireless communication. The information transmission unit 114 transmits the second information (V2V information) generated based on the first information to the identified roadside device 130. The roadside device 130 broadcasts the second information using the second wireless communication such as PC5 direct communication. Since the terminal device 220 does not support the second wireless communication, it cannot directly exchange information with the mobile object 210 through the PC5 direct communication. Even in such a case, in this embodiment, the mobile object 210 located in the vicinity of the terminal device 220 can receive information from the terminal device 220 via the MEC server 110.

[0064] Next, a description will be given of the hardware configuration of the MEC server 110. Fig. 10 shows an example of the configuration of a computer device that can be used as the MEC server 110. The computer device 500 has a control unit (CPU: Central Processing Unit) 510, a storage unit 520, a ROM (Read Only Memory) 530, a RAM (Random Access Memory) 540, a communication interface (IF: Interface) 550, and a user interface 560.

[0065] The communication interface 550 is an interface for connecting the computer device 500 to a communication network via a wired communication means or a wireless communication means, etc. The user interface 560 includes a display unit such as a display, and an input unit such as a keyboard, a mouse, and a touch panel.

[0066] The storage unit 520 is an auxiliary storage device that can hold various data. The storage unit 520 does not necessarily need to be a part of the computer device 500, and may be an external storage device or a cloud storage connected to the computer device 500 via a network.

[0067] The ROM 530 is a non-volatile storage device. For example, a semiconductor storage device having a relatively small capacity, such as a flash memory, is used for the ROM 530. The programs executed by the CPU 510 may be stored in the storage unit 520 or the ROM 530. The storage unit 520 or the ROM 530 stores various programs for implementing the functions of each unit in the MEC server 110, for example.

[0068] The above program can be stored and provided to the computer device 500 using various types of non-transitory computer-readable media. The non-transitory computer-readable media include various types of tangible storage media. Examples of the non-transitory computer-readable media include magnetic recording media, magneto-optical recording media, optical disk media, and semiconductor memories. The magnetic recording media include recording media such as flexible disks, magnetic tapes, or hard disks. The magneto-optical recording media include recording media such as magneto-optical disks. The optical disk media include disk media such as compact discs (CDs) or digital versatile disks (DVDs). The semiconductor memory includes memories such as mask ROMs, programmable ROMs (PROMs), erasable PROMs (EPROMs), flash ROMs, or RAMs. The program may also be provided to the computer using various types of temporary computer-readable media. Examples of the temporary computer-readable media include electric signals, optical signals, and electromagnetic waves. The temporary computer-readable media can provide the program to the computer via wired communication paths such as electric wires and optical fibers, or wireless communication paths.

[0069] The RAM 540 is a volatile storage device. Various semiconductor memory devices such as a dynamic random access memory (DRAM) or a static random access memory (SRAM) are used for the RAM 540. The RAM 540 can be used as an internal buffer for temporarily storing data and the like. The CPU 510 loads a program stored in the storage unit 520 or the ROM 530 into the RAM 540 and executes it. The CPU 510 executes the program to realize the functions of each unit in the MEC server 110. The CPU 510 may have an internal buffer for temporarily storing data and the like.

[0070] Although the embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the above-described embodiments, and changes and modifications to the above-described embodiments that do not deviate from the spirit of the present disclosure are also included in the present disclosure.

[0071] For example, some or all of the above embodiments may be described as, but are not limited to, the following supplementary notes.

[0072] [Appendix 1] A receiving means for receiving, from a roadside unit, first information transmitted from the mobile object using a first wireless communication; An information management means for managing information of a terminal device having a function of performing a second wireless communication; an identification means for identifying the terminal device located in the vicinity of the mobile object that transmitted the first information, based on the information of the terminal device managed by the information management means; a transmitting means for transmitting second information generated based on the first information to the terminal device identified by the identifying means via the second wireless communication.

[0073] [Appendix 2] 2. The server according to claim 1, wherein the first wireless communication is broadcast communication and the second wireless communication is unicast communication.

[0074] [Appendix 3] 3. The server according to claim 1, wherein the identifying means identifies the terminal device present within a predetermined range from the mobile object as the terminal device located in the vicinity of the mobile object.

[0075] [Appendix 4] The information of the terminal device includes location information of the terminal device, 4. The server according to claim 1, wherein the identifying means identifies the terminal device located in the vicinity of the mobile object based on the location information.

[0076] [Appendix 5] The information of the terminal device further includes communication address information of the terminal device, The server according to claim 4, wherein the transmitting means transmits the second information to the identified terminal device by using communication address information of the identified terminal device.

[0077] [Appendix 6] A server as described in any one of Appendices 1 to 5, wherein the transmitting means transmits the second information to the terminal device that transmitted the transmission request when the transmitting means receives a request to transmit the second information from the terminal device and when the terminal device that transmitted the transmission request is located in the vicinity of the mobile body that transmitted the first information.

[0078] [Appendix 7] The server according to any one of appendices 1 to 6, wherein the transmitting means transmits the second information to the identified terminal device via a base station that communicates with the terminal device using the second wireless communication.

[0079] [Appendix 8] 8. The server according to claim 1, wherein the first information is V2V (Vehicle to Vehicle) information, and the second information is information including at least a part of the V2V information.

[0080] [Appendix 9] a receiving means for receiving first information from a terminal device having a function of performing a first wireless communication via the first wireless communication; an information management means for managing information of a roadside unit that communicates with a mobile object by using a second wireless communication; an identification means for identifying the roadside devices located in the vicinity of the terminal device that transmitted the first information, based on the information of the roadside devices managed by the information management means; a transmitting means for transmitting second information generated based on the first information to the roadside device identified by the identifying means, and causing the roadside device to transmit the second information to the mobile object using the second wireless communication.

[0081] [Appendix 10] 10. The server according to claim 9, wherein the first wireless communication is unicast communication and the second wireless communication is broadcast communication.

[0082] [Appendix 11] The server according to claim 9 or 10, wherein the identifying means identifies the roadside unit present within a predetermined range from the terminal device as the roadside unit located in the vicinity of the terminal device.

[0083] [Appendix 12] 12. The server according to any one of appendices 9 to 11, wherein the first information is V2V (Vehicle to Vehicle) information, and the second information is information including at least a part of the V2V information.

[0084] [Appendix 13] A roadside unit that communicates with a mobile object using a first wireless communication; A server. The roadside unit includes: a receiving means for receiving first information transmitted from the mobile object using the first wireless communication; a transmitting means for transmitting the received first information to the server, The server, A receiving means for receiving the first information from the roadside device; An information management means for managing information of a terminal device having a function of performing a second wireless communication; an identification means for identifying the terminal device located in the vicinity of the mobile object that transmitted the first information, based on the information of the terminal device managed by the information management means; a transmitting means for transmitting second information generated based on the first information to the terminal device identified by the identifying means via the second wireless communication.

[0085] [Appendix 14] 14. The communication system according to claim 13, wherein the first wireless communication is broadcast communication and the second wireless communication is unicast communication.

[0086] [Appendix 15] The communication system according to claim 13 or 14, wherein the identification means identifies the terminal device present within a predetermined range from the mobile body as the terminal device located in the vicinity of the mobile body.

[0087] [Appendix 16] a server that communicates with a terminal device via a first wireless communication; a roadside unit that communicates with the mobile object by using a second wireless communication; The server, a receiving means for receiving first information from the terminal device via the first wireless communication; an information management means for managing information of the roadside device; an identification means for identifying the roadside devices located in the vicinity of the terminal device that transmitted the first information, based on the information of the roadside devices managed by the information management means; a transmitting means for transmitting second information generated based on the first information to the roadside device identified by the identifying means, The roadside unit includes: A receiving means for receiving the second information from the server; a transmitting means for transmitting the received second information to the mobile body using the second wireless communication.

[0088] [Appendix 17] 17. The communication system of claim 16, wherein the first wireless communication is unicast communication and the second wireless communication is broadcast communication.

[0089] [Appendix 18] 18. The communication system according to claim 16, wherein the identifying means identifies the roadside unit present within a predetermined range from the terminal device as the roadside unit located in the vicinity of the terminal device.

[0090] [Appendix 19] receiving, from a roadside unit, first information transmitted from the mobile object using a first wireless communication; identifying a terminal device located in the vicinity of the moving object that transmitted the first information based on information of the terminal device having a function of performing a second wireless communication; A communication method for transmitting second information generated based on the first information to the identified terminal device via the second wireless communication.

[0091] [Appendix 20] receiving first information via a first wireless communication from a terminal device having a function of performing the first wireless communication; identifying a roadside unit located in the vicinity of the terminal device that transmitted the first information, based on information of the roadside unit that communicates with the mobile object by using a second wireless communication; A communication method comprising: transmitting second information generated based on the first information to the identified roadside device; and causing the roadside device to transmit the second information to the mobile object using the second wireless communication.

[0092] [Appendix 21] receiving, from a roadside unit, first information transmitted from the mobile object using a first wireless communication; identifying a terminal device located in the vicinity of the moving object that transmitted the first information based on information of the terminal device having a function of performing a second wireless communication; A non-transitory computer-readable medium storing a program for causing a computer to execute a process of transmitting second information generated based on the first information to the identified terminal device via the second wireless communication.

[0093] [Appendix 22] receiving first information via a first wireless communication from a terminal device having a function of performing the first wireless communication; identifying a roadside unit located in the vicinity of the terminal device that transmitted the first information, based on information of the roadside unit that communicates with the mobile object by using a second wireless communication; A non-transitory computer-readable medium storing a program for causing a computer to execute a process of transmitting second information generated based on the first information to the identified roadside device, and causing the roadside device to transmit the second information to the mobile object using the second wireless communication. [Explanation of symbols]

[0094] 10:Communication Systems 20: Server 21: Receiving means 22: Information management means 23: Specific means 24: Transmission method 30: Mobile 40: Roadside machine 41: Receiving means 42: Transmission means 50: Terminal device 100:Communication Systems 110: MEC server 111: Information receiving unit 112: Location information management department 113: Specific part 114: Information transmission unit 130: Roadside machine 131: Communication range 150:Base station 151: Communication range 170: Core network 210: Mobile 220: Terminal device 500: Computer equipment 510:CPU 520: Storage section 530:ROM 540:RAM 550: Communication interface 560: User Interface

Claims

1. a receiving means for receiving, from a roadside unit, first information transmitted from the mobile object using the first wireless communication; an information management unit that manages information of a terminal device that has a function of performing a second wireless communication and does not have a function of performing the first wireless communication; an identification means for identifying the terminal device located in the vicinity of the mobile object that transmitted the first information, based on the information of the terminal device managed by the information management means; a transmitting means for transmitting second information generated based on the first information to the terminal device identified by the identifying means via the second wireless communication.

2. The server according to claim 1 , wherein the first wireless communication is a broadcast communication, and the second wireless communication is a unicast communication.

3. The server according to claim 1 or 2, wherein the transmitting means transmits the second information to the terminal device that transmitted the transmission request when the transmitting means receives a request to transmit the second information from the terminal device and when the terminal device that transmitted the transmission request is located in the vicinity of the mobile body that transmitted the first information.

4. a receiving means for receiving first information from a terminal device having a function of performing a first wireless communication and not having a function of performing the second wireless communication via the first wireless communication; an information management means for managing information of a roadside unit that communicates with a mobile object by using the second wireless communication; an identification means for identifying a roadside device located in the vicinity of the terminal device that has transmitted the first information, based on information about the roadside device managed by the information management means; a transmitting means for transmitting second information generated based on the first information to the roadside device identified by the identifying means, and causing the roadside device to transmit the second information to the mobile object using the second wireless communication.

5. a roadside unit that communicates with a mobile object using a first wireless communication; A server. The roadside unit includes: a receiving means for receiving first information transmitted from the mobile object using the first wireless communication; a transmitting means for transmitting the received first information to the server, The server, a receiving means for receiving the first information from the roadside device; an information management unit that manages information of a terminal device that has a function of performing a second wireless communication and does not have a function of performing the first wireless communication; an identification means for identifying the terminal device located in the vicinity of the mobile object that transmitted the first information, based on the information of the terminal device managed by the information management means; a transmitting means for transmitting second information generated based on the first information to the terminal device identified by the identifying means via the second wireless communication.

6. a server that communicates with a terminal device via a first wireless communication; a roadside unit that communicates with the mobile object by using a second wireless communication; The server, a receiving means for receiving first information from the terminal device via the first wireless communication; an information management means for managing information of the roadside device; an identification means for identifying a roadside device located in the vicinity of the terminal device that has transmitted the first information, based on information about the roadside device managed by the information management means; a transmitting means for transmitting second information generated based on the first information to the roadside device identified by the identifying means, The roadside unit includes: A receiving means for receiving the second information from the server; a transmitting means for transmitting the received second information to the mobile unit using the second wireless communication, The terminal device A communication system that does not have a function of performing the second wireless communication.

7. receiving, from a roadside unit, first information transmitted from the mobile object using a first wireless communication; identifying a terminal device that has a function of performing a second wireless communication and is located in the vicinity of the moving object that has transmitted the first information, based on information of the terminal device that does not have a function of performing the first wireless communication; A communication method for transmitting second information generated based on the first information to the identified terminal device via the second wireless communication.

8. receiving first information from a terminal device having a function of performing a first wireless communication and not having a function of performing a second wireless communication via the first wireless communication; identifying a roadside unit located in the vicinity of the terminal device that transmitted the first information, based on information of the roadside unit that communicates with the mobile object by using the second wireless communication; A communication method comprising: transmitting second information generated based on the first information to the identified roadside device; and causing the roadside device to transmit the second information to the mobile object using the second wireless communication.

9. receiving, from a roadside unit, first information transmitted from the mobile object using a first wireless communication; identifying a terminal device that has a function of performing a second wireless communication and is located in the vicinity of the moving object that has transmitted the first information, based on information of the terminal device that does not have a function of performing the first wireless communication; A program for causing a computer to execute a process of transmitting second information generated based on the first information to the identified terminal device via the second wireless communication.

10. receiving first information from a terminal device having a function of performing a first wireless communication and not having a function of performing a second wireless communication via the first wireless communication; identifying a roadside unit located in the vicinity of the terminal device that transmitted the first information, based on information of the roadside unit that communicates with the mobile object by using the second wireless communication; A program for causing a computer to execute a process of transmitting second information generated based on the first information to the identified roadside device, and causing the roadside device to transmit the second information to the mobile object using the second wireless communication.

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