JP7166504B1 - Roadside device, vehicle-mounted device, road-to-vehicle communication system, control circuit, storage medium, road-to-vehicle communication method, and road-to-vehicle communication program - Google Patents

Abstract

A roadside device (1) that performs roadside-to-vehicle communication with an in-vehicle device (5) mounted on a mobile device includes a wireless communication unit (30) that performs resource sensing on the entire band that can be used for roadside-to-vehicle communication, and a sensing result of resource sensing. resource group to be used by the in-vehicle device (5) in road-to-vehicle communication, and sets communication parameters including the selected resource group for each of one or more applications within the communication area of the roadside device (1). and a communication parameter notification unit (20) that performs control for setting a group and notifying an in-vehicle device (5) that performs resource sensing.

Description

The present disclosure relates to a roadside device, an in-vehicle device, a road-to-vehicle communication system, a control circuit, a storage medium, a road-to-vehicle communication method, and a road-to-vehicle communication program that performs road-to-vehicle communication with an in-vehicle device mounted on a mobile body.

Communication between a communication device mounted on a mobile body such as a vehicle and a communication device mounted on another mobile body such as another vehicle, and a communication device mounted on a mobile body such as a vehicle and a roadside installed on the side of a road Communication between a communication device mounted on a mobile object such as a vehicle and various communication devices, such as communication between devices, is called V2X (Vehicle to Everything) communication, and has been studied in recent years. . V2X communication includes V2V (Vehicle to Vehicle) communication, which is communication between vehicles, V2I (Vehicle to Infrastructure) communication, which is communication between a vehicle and a roadside device, and communication between a vehicle and a smartphone owned by a person. V2P (Vehicle to Pedestrian) communication, which is communication between a vehicle and a base station, and V2N (Vehicle to Network) communication, which is communication between a vehicle and a base station. In particular, except for V2N communication, V2X communication, which communicates between terminals without going through a base station, is expected to spread further.

Direct communication technology standardized by 3GPP (3rd Generation Partnership Project), which is an international standardization body, is being applied to V2X communication. This technology has Mode 1, in which the base station manages resources, and Mode 2, in which the terminal device autonomously performs sensing to secure communication resources. In both modes, multiple V2X communications are performed in one channel. . For example, when V2V communication and V2I communication use the same channel, each terminal device secures communication resources in Mode 2 using the same sensing method.

Many use cases such as autonomous driving are being considered for the application of V2X communication. It is expected that the range of usage will expand from not only communication related to driving such as communication to the car, but also to, for example, car entry/exit management and payment through drive-through.

When V2I communication is used for vehicle entrance/exit management, etc., depending on the application, the communication area may be smaller than in the case of merging support, provision of prefetch information, and the like. In addition, V2I communication requires individual communication rather than broadcasting, and although securing the communication resources required for individual communication is temporary, it is necessary to periodically secure communication resources in order to handle several exchanges. need to secure. For example, a vehicle in motion periodically transmits BM (Basic Message), which is a basic message containing information such as the location and speed of the vehicle, via V2V communication. When the transmission power is lowered, it becomes difficult for other vehicles trying to secure communication resources for V2V communication to detect the V2I communication of the running vehicle even if they perform sensing. That is, a vehicle that performs V2X communication with a limited communication area is more likely to receive interference from V2X communication by other vehicles because the V2X communication with a limited communication area is less likely to be detected by other vehicles.

To address such a problem, Patent Document 1 discloses a communication device that can efficiently secure communication resources. The communication device described in Patent Document 1 receives resource area information from the outside, and sets a sensing range according to the type of communication traffic, the moving speed of the communication device, and the like.

JP 2017-208796 A

However, according to the conventional technology described above, although it is possible to reduce interference between multiple V2X communications by setting the sensing range according to the type of traffic, it is a control of the sensing range for the communication device, and one There is a problem that interference between multiple V2X communications when a communication device performs multiple V2X communications at the same time is not considered.

The present disclosure has been made in view of the above, and an object thereof is to obtain a roadside device capable of suppressing interference in road-to-vehicle communication with an in-vehicle device mounted on a mobile object and securing resources by sensing.

In order to solve the above-described problems and achieve the object, the present disclosure is a roadside device that performs road-to-vehicle communication with an in-vehicle device mounted on a mobile device. The roadside device selects a resource group to be used by the in-vehicle device for roadside-to-vehicle communication based on the wireless communication unit that senses the resources of the entire band that can be used for roadside-to-vehicle communication, and the selected resource group based on the sensing results of the resource sensing. and a communication parameter notification unit that sets a resource group for each of one or more applications in the communication area of the roadside device and notifies the vehicle-mounted device that performs resource sensing of the communication parameter including .

The roadside device according to the present disclosure has the effect of being able to suppress interference in road-to-vehicle communication with an in-vehicle device that is mounted on a mobile object and secures resources by sensing.

1 is a diagram showing a configuration example of a road-to-vehicle communication system according to Embodiment 1. FIG. A diagram showing an example of the range of resource sensing performed by the roadside device and resource groups to be selected according to the first embodiment. FIG. 1 shows a configuration example of a roadside device according to Embodiment 1; Flowchart showing the operation of the roadside device according to the first embodiment 1 is a diagram showing a configuration example of an in-vehicle device according to Embodiment 1; FIG. Flowchart showing the operation of the in-vehicle device according to the first embodiment FIG. 3 is a diagram showing a configuration example of a processing circuit that implements the roadside device according to the first embodiment when it is implemented by a processor and a memory; FIG. 3 is a diagram showing an example of a processing circuit that implements the roadside device according to the first embodiment and that is configured by dedicated hardware; A diagram showing a configuration example of a road-to-vehicle communication system according to Embodiment 2 Flowchart showing the operation of the roadside device according to the second embodiment A diagram showing a configuration example of a management center according to the second embodiment

A roadside device, an in-vehicle device, a road-to-vehicle communication system, a control circuit, a storage medium, a road-to-vehicle communication method, and a road-to-vehicle communication program according to embodiments of the present disclosure will be described below in detail with reference to the drawings.

Embodiment 1.
FIG. 1 is a diagram showing a configuration example of a road-to-vehicle communication system 8 according to Embodiment 1. As shown in FIG. The road-to-vehicle communication system 8 includes a roadside device 1 , an in-vehicle device 5 mounted on the vehicles 4 a and 4 b, and a management center 6 . The road-to-vehicle communication system 8 is a communication system in which road-to-vehicle communication is performed between the in-vehicle device 5 mounted on the vehicles 4a and 4b, which are mobile devices, and the roadside device 1. FIG. The V2I communication area 3 is a first communication area in which the roadside device 1 performs V2I communication with the in-vehicle device 5 mounted on the vehicle 4b. The communication parameter notification area 2 is a second communication area in which the roadside device 1 notifies the vehicle-mounted devices 5 mounted on the vehicles 4a and 4b of communication parameters that are information for performing V2I communication in the V2I communication area 3. is. In the following description, the vehicles 4a and 4b may be referred to as vehicles 4 when not distinguished. Although the roadside device 1 actually communicates with the in-vehicle device 5 mounted on the vehicle 4, in order to simplify the explanation, the vehicle 4, not the in-vehicle device 5, is the subject of communication between the roadside device 1 and the roadside device 1. It may be described as communicating.

The roadside device 1 is installed, for example, at the entrance of a parking lot, and manages the entrance and exit of the vehicle 4 to and from the parking lot. The roadside device 1 recognizes the vehicle 4 within the V2I communication area 3 and performs individual communication with the vehicle 4 . The roadside device 1 performs resource sensing on the entire usable band defined by time, frequency, etc., and selects a resource group that is likely to secure necessary communication resources for the in-vehicle device 5 based on the content of the V2I communication. A resource group is included in the entire band for resource sensing by the roadside device 1, and is obtained by dividing the entire band into a plurality of regions according to time, frequency, and the like.

FIG. 2 is a diagram showing an example of the range of resource sensing performed by the roadside device 1 and resource groups to be selected according to the first embodiment. Here, the entire available band for the roadside device 1 and the like is treated as one channel, and the entire available band is divided into seven regions, that is, seven resource groups, using at least one of time and frequency. shows an example. In addition, in FIG. 2, the resource group is written as RG (Resource Group). In addition, in FIG. 2, black squares represent communication resources used in other V2X communications. In the example of FIG. 2, the roadside device 1 considers the size of each resource group and the communication resources used in other V2X communication, and selects resource groups that are likely to secure necessary communication resources in the in-vehicle device 5. Select resource group 3.

The roadside device 1 notifies the communication parameter notification area 2 of the communication parameters that the in-vehicle device 5 mounted on the vehicle 4 uses in the V2I communication in the V2I communication area 3, including the selected resource group. Note that the road device 1 may select two or more regions from regions obtained by dividing the entire band by time, frequency, etc., as the resource group. The communication parameters include a resource group in which the in-vehicle device 5 should perform resource sensing to secure communication resources, transmission power information for making the V2I communication area 3 smaller than the communication parameter notification area 2, and information to be secured for V2I communication. These include the period of communication resources, the time of communication resources to be secured, information on the V2I communication area 3, and the like. Note that communication resources may be simply referred to as resources.

The vehicles 4a and 4b are mobile bodies on which an in-vehicle device 5 that performs road-to-vehicle communication with the roadside device 1 is mounted. When the vehicle 4 a enters the communication parameter notification area 2 , the vehicle 4 a receives communication parameters notified from the roadside device 1 and secures communication resources necessary for V2I communication in the V2I communication area 3 . When the vehicle 4a advances to the position of the vehicle 4b and enters the V2I communication area 3, it performs V2I communication with the roadside device 1 based on the notified communication parameter information.

The management center 6 is a device connected to the roadside device 1 . For example, when the roadside device 1 manages entry and exit of the vehicle 4 in a parking lot or the like, the management center 6 collects information such as identification information of the vehicle 4 acquired by the roadside device 1 from the roadside device 1 and It has a function of managing the entry time to the parking lot, managing the vehicle 4 inside the parking lot, managing the exit time of the vehicle 4 from the parking lot, and the like.

In the present embodiment, when the road apparatus 1 performs V2I communication in the V2I communication area 3 by lowering the transmission power than the transmission power when notifying the communication parameters in the communication parameter notification area 2, resource sensing is performed on the entire communication resource. to grasp the usage state of communication resources, select a resource group that is likely to be least affected by other V2X communication, and notify the in-vehicle device 5 by communication parameters. As a result, the roadside device 1 can reduce the possibility of being interfered by other V2X communication or the like even when the transmission power is lowered in the V2I communication.

Next, the configuration and operation of the roadside device 1 will be described in detail. FIG. 3 is a diagram showing a configuration example of the roadside device 1 according to the first embodiment. The road device 1 includes a V2I communication control unit 10 , a network I/F (InterFace) 11 , a communication parameter notification unit 20 and a wireless communication unit 30 . The communication parameter notification unit 20 includes a resource group selection unit 21 , a communication parameter generation unit 22 and a notification control unit 23 . The radio communication unit 30 includes a resource sensing unit 31 , a resource selection unit 32 and a communication signal processing unit 33 .

The roadside device 1 has two main functions. One is the function of general V2I communication. For example, when the roadside device 1 is installed at the entrance of a parking lot and manages entry and exit of the vehicle 4, the roadside device 1 creates a communication area near the entrance of the parking lot, and communicates with the vehicle 4 within the communication area. to acquire information such as identification information of the vehicle 4 within the communication area. The other is a function of notifying the in-vehicle device 5 of the approaching vehicle 4 of communication parameters for implementing V2I communication. The contents of this notification include, for example, the transmission power for V2I communication, the resource group sensed by the in-vehicle device 5 to secure communication resources, the transmission cycle of the communication resources to be secured by the in-vehicle device 5, and the For example, the number of transmissions of the communication resource to be performed. The communication parameters notified from the roadside device 1 to the in-vehicle device 5 may be all of them, or any one or more of them. Also, the number of transmissions can be specified as a transmission period. In the roadside device 1, the V2I communication control unit 10 takes charge of the function of V2I communication, and the communication parameter notification unit 20 takes charge of the function of notifying the vehicle-mounted device 5 of the approaching vehicle 4 of communication parameters.

The V2I communication control unit 10 controls V2I communication in the roadside device 1 . The network I/F 11 controls communication with the management center 6 in the roadside device 1 . For example, when the roadside device 1 acquires information of the vehicle 4 from the vehicle-mounted device 5 mounted on the vehicle 4 in the V2I communication area 3, the acquired information is managed via the V2I communication control unit 10 and the network I/F 11. Output to center 6.

The wireless communication unit 30 performs wireless communication used for the two functions described above, that is, the V2I communication function and the function of notifying the in-vehicle device 5 of the approaching vehicle 4 of communication parameters. Also, the wireless communication unit 30 performs resource sensing on the entire band that can be used for road-to-vehicle communication between the in-vehicle device 5 and the roadside device 1 . The wireless communication unit 30 is, for example, a wireless module conforming to the V2X communication standard.

The resource sensing unit 31 performs resource sensing on the entire band that can be used for V2I communication, and outputs sensing results to the communication parameter notification unit 20 and the resource selection unit 32 .

The resource selection unit 32 selects a resource for communication parameter notification based on the sensing result of the resource sensing unit 31 obtained from the resource sensing unit 31 and the resource reservation setting information obtained from the notification control unit 23 of the communication parameter notification unit 20 . resources and resources used in V2I communication. The resource selection unit 32 may set the same transmission cycle or different transmission cycles for the resource for communication parameter notification and the resource used for V2I communication.

The communication signal processing unit 33 generates, demodulates, and the like radio signals used for the function of V2I communication and the function of notifying the in-vehicle device 5 of the approaching vehicle 4 of communication parameters.

The communication parameter notification unit 20 generates a packet for the road device 1 to notify communication parameters, and outputs the packet to the wireless communication unit 30 . Specifically, the communication parameter notification unit 20 selects a resource group to be used by the in-vehicle device 5 in road-to-vehicle communication between the in-vehicle device 5 and the roadside device 1 based on the sensing result of the resource sensing of the wireless communication unit 30. A resource group is set for each of one or more applications in the communication area of the roadside device 1 and communication parameters including the selected resource group are set, and control is performed to notify the in-vehicle device 5 that performs resource sensing.

The resource group selection unit 21 selects a resource group to be provided to the in-vehicle device 5 for V2I communication based on the sensing result of the resource sensing unit 31 acquired from the resource sensing unit 31, and notifies the communication parameter generation unit 22 of the selected resource group. .

The communication parameter generation unit 22 generates communication parameters including information such as the resource group selected by the resource group selection unit 21 and transmission power in road-to-vehicle communication, and outputs the communication parameters to the notification control unit 23 . The communication parameter generation unit 22 includes at least one of the cycle of the resource to be secured, the number of times to secure the resource, and the period of securing the resource in the communication parameter.

The notification control unit 23 outputs resource reservation setting information such as a communication parameter notification period to the resource selection unit 32 of the wireless communication unit 30 , generates a packet including communication parameter data, and sends the information to the wireless communication unit 30 . Output to the communication signal processing unit 33 .

FIG. 4 is a flow chart showing the operation of the roadside device 1 according to the first embodiment. The flowchart shown in FIG. 4 shows an overview of the operation when the roadside device 1 notifies communication parameters and performs V2I communication, and omits general operations such as re-securing wireless communication resources.

In the roadside device 1, the resource sensing unit 31 performs resource sensing of the entire usable band (step S101). The sensing range of resource sensing performed by the resource sensing unit 31 is one channel in the example of FIG. 2 described above. The sensing range of resource sensing performed by the resource sensing unit 31 may be preset in the resource sensing unit 31, or if there is a host device connected to the roadside device 1, the sensing range is set by the host device. You may The host device may be the management center 6, for example. The resource sensing unit 31 outputs sensing results to the resource selection unit 32 and the resource group selection unit 21 .

The resource group selection unit 21 selects a resource group to be provided to the in-vehicle device 5 for V2I communication based on the sensing result obtained from the resource sensing unit 31 (step S102). The resource group selection unit 21 selects, for example, a resource group with the most free resources based on the sensing result. The resource group selection unit 21 selects the resource group 3 in the example of FIG. 2 described above.

The communication parameter generation unit 22 generates communication parameters including information such as the resource group selected by the resource group selection unit 21 and transmission power required for V2I communication (step S103). The communication parameter generator 22 outputs the generated communication parameters to the notification controller 23 . The notification control unit 23 outputs to the resource selection unit 32 information on settings for securing resources, such as the communication parameter notification cycle. In addition, the notification control unit 23 outputs information on settings for securing resources for V2I communication to the resource selection unit 32 .

The resource selection unit 32 secures resources for communication parameter notification of V2I communication based on the information acquired from the notification control unit 23 (step S104). The resource selection unit 32 secures a resource capable of transmitting communication parameters, for example, once every 100 ms, as long as the vehicle 4 entering the communication parameter notification area 2 can receive the communication parameters. If the prescribed period has not elapsed (step S105: No), the communication signal processing unit 33 notifies the communication parameter notification area 2 of the communication parameters according to the resources secured by the resource selection unit 32 (step S106). The communication signal processing unit 33 periodically notifies the communication parameters in step S106 until step S105: Yes, that is, until the prescribed period elapses.

Further, the resource selection unit 32 secures resources for V2I communication based on the information acquired from the notification control unit 23 (step S107). The resource selection unit 32 secures resources capable of transmitting notification information for V2I communication at a cycle determined by V2I communication transactions. Note that the resource sensing for the resource selection unit 32 to secure resources in steps S104 and S107 may use the sensing result of the resource sensing in step S101 by the resource sensing unit 31, or the resource sensing unit 31 may Resource sensing may be performed separately for steps S104 and S107.

If the defined period has not elapsed (step S108: No), the communication signal processing unit 33 transmits notification information for V2I communication to the V2I communication area 3 according to the resources secured by the resource selection unit 32. (step S109). That is, the communication signal processing unit 33 periodically notifies the notification information for V2I communication. When the vehicle 4 enters the V2I communication area 3 and there is a response from the in-vehicle device 5 mounted on the vehicle 4 (step S110: Yes), the V2I communication control unit 10 performs V2I communication via the wireless communication unit 30. A V2I communication transaction is performed with the in-vehicle device 5 mounted on the vehicle 4 that has entered the area 3 (step S111). When the vehicle 4 moves out of the V2I communication area 3, the V2I communication control unit 10 completes the V2I communication with the in-vehicle device 5 mounted on the vehicle 4 (step S112). When there is no response from the in-vehicle device 5 (step S110: No), or after the V2I communication control unit 10 completes the V2I communication in step S112, the communication signal processing unit 33 returns to step S108. The communication signal processing unit 33 repeats the operations from step S109 to step S112 until step S108: Yes, that is, until the prescribed period elapses.

When the prescribed period has passed (step S105: Yes, step S108: Yes), the road device 1 terminates the operation of the flowchart shown in FIG. The road device 1 periodically performs the operation of the flowchart shown in FIG. In other words, the roadside device 1 causes the resource sensing unit 31 to periodically perform resource sensing of the entire usable band in step S101, and performs the operation from step S102 onward based on the sensing result of the resource sensing unit 31. . The above-mentioned prescribed period is a cycle in which the resource sensing unit 31 periodically performs resource sensing of the entire usable band in step S101 in the roadside device 1 .

In the selection of the resource group in step S102, the resource group selection unit 21 of the roadside device 1 selects the resource group that is the resource group to be used by the in-vehicle device 5 for the roadside-to-vehicle communication, and selects the most available resource from the entire bandwidth that can be used for the roadside-to-vehicle communication. Although many resource groups were selected, the method of selecting resource groups is not limited to this. The resource group selection unit 21 selects, as a resource group to be used by the in-vehicle device 5 for road-to-vehicle communication, a resource group that uses the least amount of resources at the strongest power that is a source of interference from the entire band that can be used for road-to-vehicle communication. Alternatively, a resource group that can secure an empty space in the transmission cycle of the in-vehicle device 5 in road-to-vehicle communication may be selected.

Further, since the road device 1 periodically performs the operation of the flowchart shown in FIG. 4 as described above, the time, frequency, etc. of the resource group specified by the communication parameters notified in step S106 may be changed as appropriate. . For example, when there are multiple resource groups with similar usage conditions, the roadside device 1 can change the resource group specified by the communication parameter over time so that communication is not biased to one resource group. . That is, in the roadside device 1, when there are a plurality of candidate resource groups as resource groups to be selected, the communication parameter notification unit 20 sequentially selects from the plurality of candidate resource groups, and periodically changes the resource group to be selected. You may The time for changing the resource group specified by the communication parameter can be, for example, every second, but is not limited to this.

In the flowchart shown in FIG. 4, the case where the roadside device 1 triggers the start of V2I communication has been described, but the in-vehicle device 5 can also trigger the start of V2I communication. For example, step S109 may be deleted from the flowchart shown in FIG. 4, and V2I communication may be started in such a manner that the roadside device 1 receives some information transmitted by the in-vehicle device 5 and the roadside device 1 responds.

Next, the configuration and operation of the in-vehicle device 5 will be described. FIG. 5 is a diagram showing a configuration example of the in-vehicle device 5 according to the first embodiment. The in-vehicle device 5 includes a storage unit 40 , an in-vehicle wireless control unit 50 and a wireless communication unit 60 . The in-vehicle wireless control unit 50 includes a communication control unit 51 , a setting management unit 52 and a sensing parameter setting unit 53 . The radio communication unit 60 includes a resource sensing unit 61 , a resource selection unit 62 and a communication signal processing unit 63 . The wireless communication unit 60 is similar to the wireless communication unit 30 of the roadside device 1, and the operations of the resource sensing unit 61, the resource selection unit 62, and the communication signal processing unit 63 of the vehicle-mounted device 5 are the same as those of the roadside device 1. The operations of the resource sensing unit 31, the resource selection unit 32, and the communication signal processing unit 33 are the same as those in the above.

In the following, as an example, the in-vehicle device 5 regularly transmits the BM by V2V communication while the vehicle 4 in which it is mounted is running, and the vehicle 4 in which it is mounted enters the communication range of the road-to-vehicle communication system 8. explain.

The storage unit 40 stores applications 41 and 42 . Applications 41 and 42 are applications for V2X communication. For example, the application 41 is software for V2V communication. The application 42 is software for entrance/exit management V2I communication. Although the storage unit 40 stores two applications in the example of FIG. 5, it may store only one application, or may store three or more applications. In the following description, when the applications 41 and 42 are not distinguished, they may simply be referred to as applications.

The in-vehicle wireless control unit 50 is a wireless control unit that supports multiple V2X applications. The in-vehicle wireless control unit 50 performs wireless communication according to applications 41 and 42 that are applications for V2X communication stored in the storage unit 40 . The in-vehicle wireless control unit 50 selects the resource group for the road-to-vehicle communication selected by the road-side device 1 by sensing the entire bandwidth available for the road-to-vehicle communication. Set the resource group for sensing.

Communication control unit 51 collects information about communication conditions for each application from applications 41 and 42 stored in storage unit 40 , and outputs the collected communication conditions for each application to setting management unit 52 . The communication conditions are, for example, sensing conditions, transmission cycle, transmission power, information on communication position, information on reception, and the like.

The setting management unit 52 stores communication conditions for each application acquired from the communication control unit 51 . The setting management unit 52 may create a sensing condition that satisfies all communication conditions of a plurality of applications and notify the resource sensing unit 61 of the sensing condition, or may create a sensing condition that satisfies all communication conditions of a plurality of applications and notify the resource sensing unit 61 of the sensing condition. The resource sensing unit 61 may be notified by shifting.

The sensing parameter setting unit 53 determines the parameters to be set in the resource sensing unit 61 from the sensing conditions stored in the setting management unit 52 and the communication conditions such as the transmission period, and notifies them. For example, when the applications 41 and 42 perform simultaneous transmission, the sensing parameter setting unit 53 determines a parameter that satisfies the sensing conditions of both the applications 41 and 42 and notifies the resource sensing unit 61 of the parameter.

Communication control unit 51 outputs communication conditions other than sensing to setting management unit 52 when transmission data, transmission instructions, and the like are acquired from applications 41 and 42 . Communication conditions other than sensing are used by the communication signal processing unit 63 to set processing to be described later.

The radio communication unit 60 performs resource sensing on the resource group set by the in-vehicle radio control unit 50 .

FIG. 6 is a flow chart showing the operation of the in-vehicle device 5 according to the first embodiment. In the in-vehicle device 5 , the communication signal processing unit 63 of the wireless communication unit 60 receives communication parameters notified from the road-side device 1 when the vehicle 4 on which the in-vehicle device 5 is mounted enters the communication parameter notification area 2 of the road-side device 1 . is received (step S121).

The communication signal processing unit 63 outputs the received communication parameters to the communication control unit 51 of the in-vehicle wireless control unit 50 , and the communication control unit 51 outputs the communication parameters to the setting management unit 52 . The setting management unit 52 saves the acquired communication parameters. As a result, the in-vehicle device 5 sets the communication parameters inside the in-vehicle device 5 (step S122).

The sensing parameter setting unit 53 determines and notifies the parameters to be set to the resource sensing unit 61 based on the sensing conditions, the communication conditions such as the transmission period, and the communication parameters stored in the setting management unit 52 . The resource sensing section 61 performs resource sensing based on the notification from the sensing parameter setting section 53 . The sensing range in which the resource sensing unit 61 performs resource sensing is within the range of the resource group specified by the communication parameters. The resource sensing unit 61 outputs sensing results to the resource selection unit 62 . The resource selection unit 62 selects and secures resources to be used in V2I communication from the resource group specified by the communication parameter based on the sensing result obtained from the resource sensing unit 61 (step S123). .

The communication signal processing unit 63 waits until the vehicle 4 equipped with the in-vehicle device 5 enters the V2I communication area 3 of the roadside device 1 and receives notification information for V2I communication (step S124: No). When the vehicle 4 on which the in-vehicle device 5 is mounted enters the V2I communication area 3 of the roadside device 1 and receives the notification information for V2I communication (step S124: Yes), the communication signal processing unit 63 receives the notification information for V2I communication. Information is output to the communication control unit 51 . The communication control unit 51 uses the V2I communication application 42 to perform V2I communication with the roadside device 1 (step S125).

It is conceivable that the in-vehicle device 5 receives the V2I communication notification information before securing resources. Respond to device 1.

In the flowchart shown in FIG. 6, the case where the roadside device 1 triggers the start of V2I communication has been described, but the in-vehicle device 5 can also trigger the start of V2I communication. For example, step S124 may be deleted from the flowchart shown in FIG. 6, and the roadside device 1 may receive some information transmitted by the in-vehicle device 5, and the roadside device 1 may respond to start V2I communication. In this case, the road device 1 may include the location information of the V2I communication area 3 in the communication parameters notified in the communication parameter notification area 2 as well.

Also, when there are transmission requests for a plurality of applications, the in-vehicle device 5 independently secures communication resources for each application. When multiple applications are simultaneously transmitted, the in-vehicle device 5 may transmit multiple applications at the same time if the processing of the wireless communication unit 60 is possible. If only the application can be performed, the in-vehicle wireless control unit 50 performs control so as not to overlap. In the in-vehicle device 5, when a plurality of applications operate simultaneously, the in-vehicle wireless control unit 50 sets the sensing range of the resource sensing to the range including the resource groups set for each of the plurality of applications. Secure resources. In addition, when multiple applications operate simultaneously, the in-vehicle wireless control unit 50 ensures that the resources secured for transmission do not overlap based on the transmission cycle and the number of times of transmission of each of the multiple applications.

In addition, since the in-vehicle wireless control unit 50 knows the periodic timing for an application such as V2V communication that always has regular transmission, when securing communication resources for short-term V2I communication, V2V communication Secure communication resources so that the transmission timing of the For example, when the communication resource for V2V communication is regular transmission with a period of 100 ms, and the communication resource to be secured for V2I communication is 10 times with a period of 5 ms, the vehicle-mounted radio control unit 50 performs V2I transmission during the transmission period of V2V communication. Secure communication resources to accommodate communication transmissions. The in-vehicle radio control unit 50 utilizes the fact that V2I communication secures short-term communication resources, and secures resources so as not to overlap with the transmission cycle of V2V communication as a reference. By performing such control, the in-vehicle device 5 can operate such that a plurality of applications operate independently by the in-vehicle wireless control unit 50, and even V2I communication with a short stay in the communication area can communicate. can be completed and V2V communication can also continue.

In addition, the communication resource sensed by the roadside device 1 may be the entire channel, or, if a resource pool is previously allocated to road-to-vehicle communication, it may be the allocated resource pool. May be specified.

Here, the sensing of the roadside device 1 may be power sensing, or it receives 3GPP standard PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), etc., and grasps the resource usage status of other communication devices. Either one or both may be used.

The resource group used in the description so far is defined as a resource pool defined by the 3GPP standard, or a group of resources obtained by dividing the resource pool into at least one of time and frequency. If the resource group is a group of resources obtained by dividing a resource pool into several parts, the roadside device 1 may include the method of dividing the resource pool in communication parameters and notify the in-vehicle device 5 of it.

In addition, in the present embodiment, the communication parameter notification unit 20 of the roadside device 1 controls the transmission power so that the V2I communication area 3 for road-to-vehicle communication is set higher than the communication parameter notification area 2 for notifying communication parameters. making it smaller. That is, a case has been described in which the roadside device 1 adjusts the power in the V2I communication in the V2I communication area 3 so that the power is smaller than that in communication with the communication parameters in the communication parameter notification area 2, but the present invention is not limited to this. The roadside device 1 implements V2I communication with the communication parameter notification area 2 and the V2I communication area 3 in FIG. You can also

Next, the hardware configuration of each device of the roadside device 1 will be described. In the roadside device 1 , the network I/F 11 is a communication interface capable of wired or wireless communication with the management center 6 . The wireless communication unit 30 is a wireless module capable of wireless communication with the in-vehicle device 5 . The V2I communication control unit 10 and the communication parameter notification unit 20 are implemented by processing circuits. The processing circuitry may be a processor and memory executing programs stored in the memory, or may be dedicated hardware. Processing circuitry is also called control circuitry. Note that the wireless communication unit 30 may also be realized by a processing circuit.

FIG. 7 is a diagram showing a configuration example of the processing circuit 90 when the processing circuit that implements the roadside device 1 according to the first embodiment is implemented by the processor 91 and the memory 92. As shown in FIG. A processing circuit 90 shown in FIG. 7 is a control circuit and includes a processor 91 and a memory 92 . When the processing circuit 90 is composed of the processor 91 and the memory 92, each function of the processing circuit 90 is implemented by software, firmware, or a combination of software and firmware. Software or firmware is written as a program and stored in memory 92 . In the processing circuit 90, each function is realized by the processor 91 reading and executing the program stored in the memory 92. FIG. That is, the processing circuit 90 includes a memory 92 for storing a program that results in the processing of the roadside device 1 being executed. This program can also be said to be a program for causing the roadside device 1 to execute each function realized by the processing circuit 90 . This program may be provided by a storage medium storing the program, or may be provided by other means such as a communication medium.

In the above program, the wireless communication unit 30 performs resource sensing on the entire band that can be used for road-to-vehicle communication, and the communication parameter notification unit 20 performs on-board communication based on the sensing results of the resource sensing. making the roadside device 1 execute a second step of controlling to select a resource group to be used by the device 5 and notify the communication parameters including the selected resource group to the in-vehicle device 5 within the communication area of the roadside device 1; It can be said that it is a program.

Here, the processor 91 is, for example, a CPU (Central Processing Unit), a processing device, an arithmetic device, a microprocessor, a microcomputer, or a DSP (Digital Signal Processor). The memory 92 is a non-volatile or volatile memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (registered trademark) (Electrically EPROM). A semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, or a DVD (Digital Versatile Disc) is applicable.

FIG. 8 is a diagram showing an example of the processing circuit 93 when the processing circuit realizing the roadside device 1 according to Embodiment 1 is configured by dedicated hardware. The processing circuit 93 shown in FIG. 8 is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. thing applies. The processing circuit may be partly implemented by dedicated hardware and partly implemented by software or firmware. Thus, the processing circuitry may implement each of the functions described above through dedicated hardware, software, firmware, or a combination thereof.

The hardware configuration of the in-vehicle device 5 is also the same. In the in-vehicle device 5, the storage unit 40 is a memory. The wireless communication unit 60 is a wireless module capable of wireless communication with the roadside device 1 . The in-vehicle radio control unit 50 is implemented by a processing circuit. The processing circuitry may be a processor and memory executing programs stored in the memory, or may be dedicated hardware. Processing circuitry is also called control circuitry. Note that the wireless communication unit 60 may also be realized by a processing circuit.

As described above, according to the present embodiment, the road-to-vehicle communication system 8 operates in a mode in which the in-vehicle device 5 autonomously secures communication resources and performs communication. When securing communication resources, the roadside device 1 performs resource sensing on the entire available band, selects a resource group to be used in V2I communication, and periodically sends communication parameters to the onboard device 5 within the communication parameter notification area 2. to notify. In addition, the road device 1 reduces the transmission power when communicating with a V2I communication application, that is, in the V2I communication area 3, compared to when notifying communication parameters in the communication parameter notification area 2, and performs V2I communication only in necessary areas. conduct. As a result, the road-to-vehicle communication system 8 can efficiently adjust the communication area of the roadside device 1 and secure resources for V2I communication. The roadside device 1 can suppress interference in roadside-to-vehicle communication with an in-vehicle device 5 that is mounted on a vehicle 4 that is a mobile body and secures resources by sensing, and can communicate by changing the size of the communication area depending on the type of communication. It can be performed.

In the road-to-vehicle communication system 8, the road-side device 1 performs resource sensing on the entire bandwidth available for road-to-vehicle communication, and selects a resource group to be used by the in-vehicle device 5 in road-to-vehicle communication based on the sensing result of the resource sensing. , notifies the communication parameters including the selected resource group to the vehicle-mounted device 5 within the communication area of the roadside device 1 . Based on the resource group selected by the roadside device 1, the in-vehicle device 5 sets a resource group for resource sensing for each of one or more applications and performs resource sensing.

Embodiment 2.
In the second embodiment, communication between the roadside device 1 and the in-vehicle device 5 mounted on the vehicle 4 when a plurality of roadside devices 1 exist in one management area will be described.

FIG. 9 is a diagram showing a configuration example of a road-to-vehicle communication system 8a according to the second embodiment. The road-to-vehicle communication system 8a includes roadside devices 1a and 1b, in-vehicle devices 5 mounted on vehicles 4c, 4d, 4e and 4f, and a management center 6a. In the road-to-vehicle communication system 8a, the roadside devices 1a and 1b have the same configuration as the roadside device 1 of the first embodiment, and the vehicles 4c, 4d, 4e and 4f have the same configuration as the vehicles 4a and 4b of the first embodiment. , and the in-vehicle device 5 has the same configuration as the in-vehicle device 5 of the first embodiment. In the following description, roadside devices 1a and 1b may be referred to as roadside devices 1 when not distinguished, and vehicles 4c, 4d, 4e, and 4f may be referred to as vehicles 4 when not distinguished. A communication parameter notification area 2a and a V2I communication area 3a are communication areas generated by the roadside device 1a, and a communication parameter notification area 2b and a V2I communication area 3b are communication areas generated by the roadside device 1b.

The management center 6a is connected to the roadside devices 1a and 1b. The management area 7 is a management area such as an automatic driving area for realizing automatic driving of the vehicle 4 in the road-to-vehicle communication system 8a. The road-to-vehicle communication system 8a is, for example, a system that manages the vehicles 4 entering and exiting the management area 7 by the roadside devices 1a and 1b.

Here, it is assumed that each vehicle 4 regularly transmits BM through V2V communication. The vehicle 4c runs and enters the management area 7. - 特許庁When the vehicle 4c enters the V2I communication area 3a, the roadside device 1a performs V2I communication with the vehicle-mounted device 5 mounted on the vehicle 4c, acquires information such as identification information of the vehicle 4c from the vehicle 4c, The obtained information is notified to the management center 6a. The vehicle 4c continues traveling, and within the management area 7, transmits BM including position information and the like to the other vehicles 4 by V2V communication, and the BM including the position information and the like of the other vehicles 4 is transmitted from the other vehicles 4. receive. The position when the vehicle 4c is performing V2V communication within the management area 7 is the position of the vehicles 4d and 4e in FIG. When the vehicle 4c continues traveling and exits the management area 7, the roadside device 1b performs V2I communication with the in-vehicle device 5 mounted on the vehicle 4c when the vehicle 4c enters the V2I communication area 3b. , acquires information such as identification information of the vehicle 4c from the vehicle 4c, and notifies the management center 6a of the acquired information. The position of the vehicle 4c when it leaves the management area 7 is the position of the vehicle 4f in FIG.

The operation of the roadside devices 1a and 1b in the situation shown in FIG. 9 is the same as the operation of the roadside device 1 of the first embodiment. The roadside devices 1a and 1b notify the management center 6a of the resource group selected from the sensing results for V2I communication. The management center 6a manages the resource group selected by each connected roadside device 1. FIG. The management center 6a prevents interference by, for example, changing the sensing range of the roadside device 1 when the roadside device 1 closer to the installation position selects the same resource group for V2I communication. For V2V communication used in the entire management area 7, the management center 6a sets a resource group not selected for V2I communication by each roadside device 1 as a resource group for V2V communication. The road device 1a is notified. The roadside device 1a at the entrance of the management area 7 notifies the communication parameter notification area 2a of the communication parameters including the resource group information for V2V communication based on the notification from the management center 6a.

As for the connection method between the roadside devices 1a, 1b and the management center 6a, a wired connection is used in FIG. Alternatively, wireless connection may be made indirectly via a base station or the like (not shown).

FIG. 10 is a flow chart showing the operation of the roadside devices 1a and 1b according to the second embodiment. The flowchart shown in FIG. 10 is obtained by adding step S113 to the flowchart shown in FIG. 4 of the first embodiment. The roadside devices 1a and 1b notify the management center 6a of the resource group selected in step S102 (step S113). In the roadside devices 1a and 1b, the communication parameter generation unit 22 notifies the selected resource group to the management center 6a via the notification control unit 23, the communication signal processing unit 33, the V2I communication control unit 10, and the network I/F 11. do. Although the description is omitted in FIG. 3, the communication parameter generation unit 22, when the notification control unit 23 and the network I/F 11 can directly transmit and receive information, sends the selected resource group to the notification control unit 23 and the network I/F 11. The management center 6a may be notified via the network I/F 11.

The roadside devices 1a and 1b periodically perform the operations of the flowchart shown in FIG. 10 in the same way that the roadside device 1 of the first embodiment periodically performs the operations of the flowchart shown in FIG. In other words, the roadside devices 1a and 1b have the resource sensing unit 31 periodically perform resource sensing of the entire usable band in step S101, and the resource group selection unit 21 periodically selects a resource group in step S102. Become. Therefore, the roadside devices 1a and 1b may notify the management center 6a in step S113 each time a resource group is selected in step S102, or the resource group selected in step S102 may change due to changes in the surrounding circumstances. In step S113, the management center 6a may be notified only when it becomes.

Next, the configuration and operation of the management center 6a will be described. FIG. 11 is a diagram showing a configuration example of the management center 6a according to the second embodiment. The management center 6 a includes a network I/F 70 , a resource group information storage section 71 , a resource management section 72 and an intra-area resource information management section 73 .

The network I/F 70 controls communication with the roadside device 1 in the management center 6a. The network I/F 70 causes the resource group information storage unit 71 to store the information of the resource group selected by each road device 1 that is notified and acquired from each road device 1 .

The resource group information storage unit 71 stores information on the resource group selected by each road device 1 acquired by the network I/F 70 .

The resource management unit 72 manages resource groups used by each road device 1 stored in the resource group information storage unit 71 . For example, the resource management unit 72 allocates a resource group to V2X communication used in the entire management area 7 for V2V communication, V2I communication that only performs broadcast in information distribution, etc., and there is a resource group that is likely to interfere. In this case, the resource group of one of the roadside devices 1 is changed. The resource management unit 72 notifies the in-area resource information management unit 73 of the result of the allocation, change, etc. of the resource group.

The intra-area resource information management unit 73 determines the roadside device 1 that notifies the vehicle 4 of the resource group commonly used within the management area 7, and collects information on the resource group commonly used within the management area 7, each It controls the distribution of resource information and the like for which the roadside device 1 performs resource sensing to each roadside device 1 via the network I/F 70 .

Note that the management center 6a also processes the V2I communication itself, but since this is a general process, a description thereof will be omitted. The processing of the V2I communication itself is, for example, processing related to management of the vehicle 4 in the example of entrance/exit management, and changes depending on the V2I communication.

A hardware configuration of the management center 6a will be described. In the management center 6a, the network I/F 70 is a communication interface that enables wired or wireless communication with the roadside device 1. FIG. The resource group information storage unit 71 is a memory. The resource manager 72 and the intra-area resource information manager 73 are realized by processing circuits. The processing circuitry may be a processor and memory executing programs stored in the memory, or may be dedicated hardware. Processing circuitry is also called control circuitry.

As described above, according to the present embodiment, in the road-to-vehicle communication system 8a, the management center 6a grasps the usage status of the communication resources of the plurality of roadside devices 1 within the management area 7, and Limit the communication resources of applications used by Thereby, the road-to-vehicle communication system 8a can reduce interference with the communication of the roadside device 1 within the management area 7 .

The configurations shown in the above embodiments are only examples, and can be combined with other known techniques, or can be combined with other embodiments, without departing from the scope of the invention. It is also possible to omit or change part of the configuration.

1, 1a, 1b roadside device, 2, 2a, 2b communication parameter notification area, 3, 3a, 3b V2I communication area, 4a, 4b, 4c, 4d, 4e, 4f vehicle, 5 vehicle-mounted device, 6, 6a management center, 7 management area 8, 8a road-to-vehicle communication system 10 V2I communication control unit 11, 70 network I/F 20 communication parameter notification unit 21 resource group selection unit 22 communication parameter generation unit 23 notification control unit 30 , 60 wireless communication unit, 31, 61 resource sensing unit, 32, 62 resource selection unit, 33, 63 communication signal processing unit, 40 storage unit, 41, 42 application, 50 in-vehicle wireless control unit, 51 communication control unit, 52 setting Management unit 53 sensing parameter setting unit 71 resource group information storage unit 72 resource management unit 73 intra-area resource information management unit.

Claims (20)

A roadside device that performs road-to-vehicle communication with an in-vehicle device mounted on a mobile device,
a wireless communication unit that performs resource sensing on the entire band that can be used for road-to-vehicle communication;
selecting a resource group to be used by the in-vehicle device in the road-to-vehicle communication based on the sensing result of the resource sensing, and transmitting communication parameters including the selected resource group to one or more of the roadside devices within a communication area of the roadside device; a communication parameter notification unit that sets a resource group for each application and controls notification to the in-vehicle device that performs resource sensing;
A roadside device comprising: The communication parameter notification unit controls transmission power to make the first communication area for the road-to-vehicle communication smaller than the second communication area for notifying the communication parameter.
The roadside device according to claim 1, characterized in that: wherein the communication parameter notification unit includes information on transmission power in the road-to-vehicle communication in the communication parameters;
3. The roadside device according to claim 1 or 2, characterized in that: wherein the communication parameter notification unit includes at least one of a cycle of resources to be secured, a frequency of resources to be secured, and a period of time to secure resources in the communication parameters;
The roadside device according to any one of claims 1 to 3, characterized in that: The communication parameter notification unit selects, as the resource group to be used by the in-vehicle device in the road-to-vehicle communication, a resource group with the most available resources from the entire bandwidth available in the road-to-vehicle communication.
The roadside device according to any one of claims 1 to 4, characterized in that: The communication parameter notification unit selects, as the resource group to be used by the in-vehicle device in the road-to-vehicle communication, a resource group that uses the least amount of resources with the highest power from all bands available in the road-to-vehicle communication.
The roadside device according to any one of claims 1 to 4, characterized in that: The communication parameter notification unit selects, as the resource group used by the in-vehicle device in the road-to-vehicle communication, a resource group that can secure an empty space in the transmission cycle of the in-vehicle device in the road-to-vehicle communication.
The roadside device according to any one of claims 1 to 4, characterized in that: When there are a plurality of candidate resource groups as the resource group to be selected, the communication parameter notification unit sequentially selects from the plurality of candidate resource groups and periodically changes the selected resource group.
The roadside device according to any one of claims 1 to 7, characterized in that: An in-vehicle device that is mounted on a mobile device and performs road-to-vehicle communication with a roadside device,
Based on the resource group used by the in-vehicle device for the road-to-vehicle communication selected by the roadside device that performs resource sensing on the entire bandwidth available for the road-to-vehicle communication, a resource group for resource sensing is selected for each of one or more applications. an in-vehicle wireless control unit to be set;
a radio communication unit that performs resource sensing on the resource group set by the in-vehicle radio control unit;
An in-vehicle device comprising: When a plurality of the applications operate simultaneously, the in-vehicle wireless control unit sets the sensing range of the resource sensing to a range including the resource groups set for each of the plurality of applications, and sets the sensing range for each of the plurality of applications secure resources,
10. The in-vehicle device according to claim 9, wherein: When a plurality of the applications operate simultaneously, the in-vehicle wireless control unit prevents resources secured for transmission from overlapping based on the transmission cycle and the number of transmissions of each of the plurality of applications.
11. The in-vehicle device according to claim 9 or 10, characterized in that: A road-to-vehicle communication system in which an in-vehicle device mounted on a mobile device and a roadside device perform road-to-vehicle communication,
Resource sensing is performed on the entire bandwidth available for the road-to-vehicle communication, a resource group to be used by the in-vehicle device in the road-to-vehicle communication is selected based on the sensing result of the resource sensing, and communication includes the selected resource group. the roadside device that notifies the in-vehicle device within the communication area of the roadside device of parameters;
an in-vehicle device that performs resource sensing by setting a resource group for resource sensing for each of one or more applications based on the resource group selected by the roadside device;
A road-to-vehicle communication system comprising: A control circuit for controlling an in-vehicle device mounted on a mobile device and a roadside device that performs road-to-vehicle communication,
Resource sensing of the entire band that can be used for road-to-vehicle communication,
selecting a resource group to be used by the in-vehicle device in the road-to-vehicle communication based on the sensing result of the resource sensing, and transmitting communication parameters including the selected resource group to one or more of the roadside devices within a communication area of the roadside device; setting a resource group for each application and notifying the in-vehicle device that performs resource sensing;
a control circuit for causing the roadside device to implement: A control circuit mounted on a mobile device for controlling an in-vehicle device that performs road-to-vehicle communication with a roadside device,
Based on the resource group used by the in-vehicle device for the road-to-vehicle communication selected by the roadside device that performs resource sensing on the entire bandwidth available for the road-to-vehicle communication, a resource group for resource sensing is selected for each of one or more applications. setting,
resource sensing the configured resource group;
A control circuit that causes the in-vehicle device to implement: A storage medium storing a program for controlling an in-vehicle device mounted on a mobile device and a roadside device that performs road-to-vehicle communication,
Said program
Resource sensing of the entire band that can be used for road-to-vehicle communication,
selecting a resource group to be used by the in-vehicle device in the road-to-vehicle communication based on the sensing result of the resource sensing, and transmitting communication parameters including the selected resource group to one or more of the roadside devices within a communication area of the roadside device; setting a resource group for each application and notifying the in-vehicle device that performs resource sensing;
a storage medium that causes the roadside device to implement: A storage medium that stores a program for controlling an in-vehicle device that is installed in a mobile device and performs road-to-vehicle communication with a roadside device,
Said program
Based on the resource group used by the in-vehicle device for the road-to-vehicle communication selected by the roadside device that performs resource sensing on the entire bandwidth available for the road-to-vehicle communication, a resource group for resource sensing is selected for each of one or more applications. setting,
resource sensing the configured resource group;
A storage medium characterized by causing the in-vehicle device to implement: A road-to-vehicle communication method for a roadside device that performs road-to-vehicle communication with an in-vehicle device mounted on a mobile device,
a first step in which the wireless communication unit performs resource sensing on the entire bandwidth available for the road-to-vehicle communication;
A communication parameter notification unit selects a resource group to be used by the vehicle-mounted device in the road-to-vehicle communication based on a sensing result of the resource sensing, and transmits communication parameters including the selected resource group within a communication area of the roadside device. A second step of setting a resource group for each of one or more applications and performing control to notify the in-vehicle device that performs resource sensing in
A road-to-vehicle communication method, comprising: A road-to-vehicle communication method for an in-vehicle device mounted on a mobile device and performing road-to-vehicle communication with a roadside device,
for each one or more applications based on the resource group used by the in-vehicle device in the road-to-vehicle communication selected by the roadside device that senses the entire bandwidth available in the road-to-vehicle communication by the in-vehicle wireless control unit. a first step of configuring a resource group for resource sensing;
a second step in which a wireless communication unit performs resource sensing on the resource group set by the in-vehicle wireless control unit;
A road-to-vehicle communication method, comprising: A road-to-vehicle communication program for controlling a roadside device that performs road-to-vehicle communication with an in-vehicle device mounted on a mobile device,
a first step of resource sensing the entire bandwidth available for road-to-vehicle communication;
selecting a resource group to be used by the in-vehicle device in the road-to-vehicle communication based on the sensing result of the resource sensing, and transmitting communication parameters including the selected resource group to one or more of the roadside devices within a communication area of the roadside device; a second step of setting a resource group for each application and performing control of notifying the in-vehicle device that performs resource sensing;
A road-to-vehicle communication program characterized by causing a computer to implement A road-to-vehicle communication program for controlling an in-vehicle device installed in a mobile device and performing road-to-vehicle communication with a roadside device,
Based on the resource group used by the in-vehicle device for the road-to-vehicle communication selected by the roadside device that performs resource sensing on the entire bandwidth available for the road-to-vehicle communication, a resource group for resource sensing is selected for each of one or more applications. a first step of setting;
a second step of resource sensing the configured resource group;
A road-to-vehicle communication program characterized by causing a computer to implement

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