WO2023181211A1

WO2023181211A1 - Roadside device, in-vehicle device, road-to-vehicle communication system, control circuit, storage medium, road-to-vehicle communication method, and road-to-vehicle communication program

Info

Publication number: WO2023181211A1
Application number: PCT/JP2022/013679
Authority: WO
Inventors: 麻里落合; 明▲徳▼ 平; 周作梅田; 雄末廣; 隆淺原; 進吾龍; 達也横山
Original assignee: 三菱電機株式会社
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2023-09-28
Also published as: JPWO2023181211A1; JP7166504B1

Abstract

A roadside device (1) for carrying out road-to-vehicle communication with an in-vehicle device (5) installed in mobile machine comprises: a radio communication unit (30) that carries out resource sensing over the entire band that can be used in road-to-vehicle communication; and a communication parameter notification unit (20) that selects, on the basis of the sensing results of the resource sensing, a resource group to be used by the in-vehicle device (5) in the road-to-vehicle communication, and carries out control for issuing notification about a communication parameter including the selected resource group to the in-vehicle device (5) that is within the communication area of the roadside device (1), sets a resource group for each of one or more applications, and performs resource sensing.

Description

Roadside equipment, in-vehicle equipment, road-to-vehicle communication system, control circuit, storage medium, road-to-vehicle communication method, and road-to-vehicle communication program

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 object.

Communication between a communication device mounted on a moving object such as a vehicle and a communication device mounted on another moving object such as a vehicle, and a communication device mounted on a moving object such as a vehicle and a roadside device installed on the side of the road. Communication between communication devices installed in moving objects such as vehicles 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 vehicles and roadside devices, and communication between vehicles and people's smartphones, etc. These include V2P (Vehicle to Pedestrian) communication, which is ``Vehicle to Pedestrian'' communication, and V2N (Vehicle to Network) communication, which is communication between a vehicle and a base station. In particular, V2X communication, which performs communication between terminals without going through a base station, except V2N communication, is expected to become even more popular in the future.

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

The application of V2X communication is being considered for many use cases such as autonomous driving, but if it is put into practical use and many cars are equipped with V2X compatible communication devices, it will be possible to use communication for autonomous driving and ensure safety. It is expected that the range of use will expand beyond driving-related communication such as communication for cars, for example, to control entry and exit of cars, and payment at drive-throughs.

When using V2I communication to manage vehicle entry and exit, depending on the application, the communication area may be smaller than when providing merging support or pre-reading information. In addition, V2I communication requires individual communication rather than broadcasting, and although securing the communication resources necessary for individual communication is temporary, in order to handle several exchanges, periodic communication resource allocation is required. Requires security. For example, a moving vehicle periodically sends a BM (Basic Message), which is a basic message containing the vehicle's location information, speed information, etc., using V2V communication, and in order to reduce the communication area using V2I communication. If the transmission power is reduced, other vehicles trying to secure communication resources for V2V communication will have difficulty detecting V2I communication of the running vehicle even if they perform sensing. That is, a vehicle that performs V2X communication with a narrowed communication area is more likely to receive interference from V2X communication by other vehicles because the V2X communication with a narrowed communication area is difficult to be detected by other vehicles.

To address such problems, 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.

JP2017-208796A

However, according to the above-mentioned conventional technology, although it is possible to reduce interference between multiple V2X communications by setting the sensing range depending on the type of traffic, it is only a control of the sensing range for communication devices, and only one There is a problem in that interference between multiple V2X communications when a communication device simultaneously performs multiple V2X communications is not taken into account.

The present disclosure has been made in view of the above, and an object of the present disclosure is to obtain a roadside device that can suppress interference in road-to-vehicle communication with a vehicle-mounted device that is mounted on a moving body and secures resources through sensing.

In order to solve the above-mentioned problems and achieve the objectives, 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 includes a wireless communication unit that performs resource sensing of the entire band available for road-to-vehicle communication, and a wireless communication unit that selects a resource group to be used by the on-vehicle device for road-to-vehicle communication based on the sensing result of the resource sensing, and selects a resource group to be used by the on-vehicle device for road-to-vehicle communication. and a communication parameter notification unit configured to set a resource group for each of one or more applications in the communication area of the roadside device and to notify the in-vehicle device that performs resource sensing of the communication parameters including the above. .

The roadside device according to the present disclosure has the effect of suppressing interference in road-to-vehicle communication with a vehicle-mounted device that is mounted on a moving body and secures resources through sensing.

A diagram showing a configuration example of a road-to-vehicle communication system according to Embodiment 1 A diagram showing an example of the range of resource sensing performed by the roadside device and resource groups to be selected according to Embodiment 1. A diagram showing a configuration example of a roadside device according to Embodiment 1 Flowchart showing the operation of the roadside device according to the first embodiment A diagram showing a configuration example of an on-vehicle device according to Embodiment 1 Flowchart showing the operation of the in-vehicle device according to the first embodiment A diagram illustrating an example of the configuration of a processing circuit when the processing circuit that implements the roadside device according to Embodiment 1 is implemented using a processor and memory. A diagram showing an example of a processing circuit when the processing circuit realizing the roadside device according to Embodiment 1 is configured with dedicated hardware. A diagram showing a configuration example of a road-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 Embodiment 2

Below, 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 in detail based on the drawings.

Embodiment 1.
FIG. 1 is a diagram showing a configuration example of a road-to-vehicle communication system 8 according to the first embodiment. The road-to-vehicle communication system 8 includes a roadside device 1, an on-vehicle device 5 mounted on

vehicles

4a and 4b, and a management center 6. The road-to-vehicle communication system 8 is a communication system in which an on-vehicle device 5 mounted on

vehicles

4a, 4b, which are mobile devices, and a roadside device 1 perform road-to-vehicle communication. The V2I communication area 3 is a first communication area where 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 where the roadside device 1 notifies the in-vehicle devices 5 mounted on the

vehicles

4a and 4b of communication parameters, which are information for performing V2I communication in the V2I communication area 3. It is. In the following description, the

vehicles

4a and 4b may be referred to as a vehicle 4 if not distinguished. Although the roadside device 1 actually communicates with the vehicle-mounted device 5 mounted on the vehicle 4, in order to simplify the explanation, we will focus on the vehicle 4, not the vehicle-mounted device 5, and communicate with the roadside device 1. It may be written to indicate communication.

The roadside device 1 is installed, for example, at the entrance of a parking lot, and manages entry and exit of vehicles 4 into 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 over the entire available band defined by time, frequency, etc., and selects a resource group that is likely to be able to secure necessary communication resources in the vehicle-mounted device 5 based on the content of the V2I communication. A resource group is included in the entire band in which the roadside device 1 performs resource sensing, and is obtained by dividing the entire band into a plurality of regions based on time, frequency, etc.

FIG. 2 is a diagram illustrating 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 band that can be used by the roadside device 1, etc. is defined as one channel, and the entire available band is divided into seven areas, that is, seven resource groups, using at least one of time and frequency. An example is shown. Note that in FIG. 2, the resource group is expressed as RG (Resource Group). Furthermore, 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 communications, and selects the resource group that is likely to secure the necessary communication resources for the in-vehicle device 5. Select resource group 3.

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

The

vehicles

4a and 4b are mobile bodies on which an on-vehicle device 5 that performs road-to-vehicle communication with the roadside device 1 is mounted. When the vehicle 4a enters the communication parameter notification area 2, it receives the 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 location 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 vehicles 4 in a parking lot, 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 functions such as managing the time of entry into the parking lot, managing the vehicles 4 inside the parking lot, and managing the time of exit of the vehicles 4 from the parking lot.

In this embodiment, when the roadside device 1 performs V2I communication in the V2I communication area 3 with lower transmission power than the transmission power when notifying communication parameters in the communication parameter notification area 2, the roadside device 1 performs resource sensing on the entire communication resource. to grasp the usage status of communication resources, select a resource group that is likely to have the least influence from other V2X communications, and notify the on-vehicle device 5 based on the communication parameters. Thereby, even when the roadside device 1 operates with reduced transmission power in V2I communication, it is possible to reduce the possibility of receiving interference from other V2X communication or the like.

Next, the configuration and operation of the roadside device 1 will be explained in detail. FIG. 3 is a diagram showing a configuration example of the roadside device 1 according to the first embodiment. The roadside device 1 includes a V2I communication control section 10, a network I/F (InterFace) 11, a communication parameter notification section 20, and a wireless communication section 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 wireless 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 a general V2I communication function. For example, when the roadside device 1 is installed at the entrance of a parking lot to manage entry and exit of vehicles 4, the roadside device 1 creates a communication area near the entrance of the parking lot and communicates with the vehicles 4 within the communication area. and obtains information such as identification information of vehicles 4 within the communication area. The other function is to notify the on-vehicle device 5 of the approaching vehicle 4 of communication parameters for realizing V2I communication. The contents of this notification include, for example, the transmission power during V2I communication, the resource group that the in-vehicle device 5 senses to secure communication resources, the transmission cycle of communication resources that the in-vehicle device 5 should secure, and the communication resource that the in-vehicle device 5 should secure. This includes the number of times communication resources should be sent. The communication parameters notified from the roadside device 1 to the in-vehicle device 5 may be all of these, or any one or more of them. Further, the number of times of transmission can also be specified as a transmission period. In the roadside device 1, the V2I communication control unit 10 is in charge of the function of V2I communication, and the communication parameter notification unit 20 is in charge of the function of notifying the on-vehicle 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 between the roadside device 1 and the management center 6 . For example, when acquiring information about the vehicle 4 from the on-vehicle device 5 mounted on the vehicle 4 in the V2I communication area 3, the roadside device 1 manages the acquired information 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, namely, the function of V2I communication and the function of notifying the on-vehicle device 5 of the approaching vehicle 4 of communication parameters. Furthermore, the wireless communication unit 30 performs resource sensing on the entire band that can be used for road-to-vehicle communication between the on-vehicle device 5 and the roadside device 1. The wireless communication unit 30 is, for example, a wireless module compliant with the V2X communication standard.

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

The resource selection unit 32 selects a communication parameter notification based on the sensing result 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 to be used in V2I communication. The resource selection unit 32 may set the resources for communication parameter notification and the resources used in V2I communication to the same transmission cycle or to different transmission cycles.

The communication signal processing unit 33 generates and demodulates a wireless signal used in the function of V2I communication and the function of notifying the on-vehicle device 5 of the approaching vehicle 4 of communication parameters.

The communication parameter notification unit 20 generates a packet for the roadside device 1 to notify communication parameters, and outputs it to the wireless communication unit 30. Specifically, the communication parameter notification unit 20 determines the resource group used by the in-vehicle device 5 in the road-to-vehicle communication between the in-vehicle device 5 and the roadside device 1 based on the sensing result of resource sensing by the wireless communication unit 30. Control is performed to notify communication parameters including the selected resource group to the on-vehicle device 5 that sets a resource group for each one or more applications in the communication area of the roadside device 1 and 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 obtained from the resource sensing unit 31 and notifies the communication parameter generation unit 22. .

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 the 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, in the communication parameters, at least one of the cycle of resources to be secured, the number of times of resources to be secured, and the period for securing resources.

The notification control unit 23 outputs information on resource reservation settings such as the communication parameter notification cycle 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 by generating a packet containing communication parameter data. It is output to the communication signal processing section 33.

FIG. 4 is a flowchart showing the operation of the roadside device 1 according to the first embodiment. The flowchart shown in FIG. 4 shows an outline of the operation when the roadside device 1 performs communication parameter notification and 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 available 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 set in advance in the resource sensing unit 31, or if there is a host device connected to the roadside device 1, the sensing range may be set from the host device. You may. The host device may be, for example, the management center 6. The resource sensing section 31 outputs sensing results to the resource selection section 32 and the resource group selection section 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 results obtained from the resource sensing unit 31 (step S102). The resource group selection unit 21 selects, for example, a resource group with the most available resources based on the sensing results. The resource group selection unit 21 selects 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 the transmission power required for V2I communication (step S103). The communication parameter generation unit 22 outputs the generated communication parameters to the notification control unit 23. The notification control unit 23 outputs to the resource selection unit 32 information on resource reservation settings, such as a communication parameter notification cycle. Further, 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). Since it is sufficient that the vehicle 4 that has entered the communication parameter notification area 2 can receive the communication parameters, the resource selection unit 32 secures resources that can transmit the communication parameters at a frequency of about once every 100 ms, for example. 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 S105: No). 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 has elapsed.

Furthermore, 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 broadcast information for V2I communication at a period determined by a transaction of V2I communication. Note that for the resource sensing for the resource selection unit 32 to secure resources in step S104 and step S107, the sensing result of the resource sensing in step S101 by the resource sensing unit 31 may be used, or the resource sensing unit 31 may use the sensing result of the resource sensing in step S101. Resource sensing may be performed separately for step S104 and step S107.

If the prescribed period has not elapsed (step S108: No), the communication signal processing unit 33 transmits broadcast 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 broadcast 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 on-vehicle device 5 mounted on the vehicle 4 that has entered the area 3 (step S111). When the vehicle 4 moves outside the V2I communication area 3, the V2I communication control unit 10 completes the V2I communication with the on-vehicle device 5 mounted on the vehicle 4 (step S112). If 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 repeatedly performs the operations from step S109 to step S112 until step S108: Yes, that is, until the specified period has elapsed.

If the prescribed period has elapsed (step S105: Yes, step S108: Yes), the roadside device 1 ends the operation of the flowchart shown in FIG. 4. The roadside device 1 periodically carries out the operation shown in the flowchart shown in FIG. That is, the roadside device 1 periodically performs resource sensing of the entire available band in step S101 in the resource sensing unit 31, and performs operations from step S102 onwards 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 in the roadside device 1 periodically performs resource sensing of the entire available band in step S101.

Note that, in selecting the resource group in step S102, the resource group selection unit 21 of the roadside device 1 selects the resource group with the most vacant resource from the entire band available for road-to-vehicle communication as a resource group to be used by the on-vehicle device 5 in road-to-vehicle communication. Although a large number of resource groups are selected, the method for selecting resource groups is not limited to this. The resource group selection unit 21 selects, as a resource group used by the in-vehicle device 5 in road-to-vehicle communication, a resource group that uses the fewest resources at the strongest power and becomes an interference source from the entire band available for road-to-vehicle communication. Alternatively, a resource group that can ensure availability in the transmission cycle of the in-vehicle device 5 in road-to-vehicle communication may be selected.

Further, since the roadside device 1 periodically performs the operation shown in the flowchart shown in FIG. 4 as described above, it may change the time, frequency, etc. of the resource group specified by the communication parameters notified in step S106 as appropriate. . For example, if there are multiple resource groups with similar usage status, the roadside device 1 can operate so that communication is not biased toward one resource group by temporally changing the resource group specified by the communication parameter. . That is, in the roadside device 1, when there are multiple candidate resource groups as resource groups to be selected, the communication parameter notification unit 20 sequentially selects from the multiple 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 parameters may be, for example, every second, but is not limited thereto.

Furthermore, in the flowchart shown in FIG. 4, a case has been described in which the roadside device 1 triggers the start of V2I communication, but it is also possible for the in-vehicle device 5 to 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 explained. FIG. 5 is a diagram showing an example of the configuration of the in-vehicle device 5 according to the first embodiment. The in-vehicle device 5 includes a storage section 40, an in-vehicle wireless control section 50, and a wireless communication section 60. The in-vehicle wireless control section 50 includes a communication control section 51, a setting management section 52, and a sensing parameter setting section 53. The wireless communication unit 60 includes a resource sensing unit 61, a resource selection unit 62, and a communication signal processing unit 63. Note that 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, resource selection unit 62, and communication signal processing unit 63 of the in-vehicle device 5 are also similar to the wireless communication unit 30 of the roadside device 1. The operations are similar to those of the resource sensing section 31, resource selection section 32, and communication signal processing section 33.

In the following, as an example, a case will be described in which the on-vehicle device 5 regularly transmits BM through V2V communication while the vehicle 4 on which it is mounted is traveling, and the vehicle 4 on which it is mounted is within 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 entry/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 three or more applications. In the following description, if the applications 41 and 42 are not distinguished, they may be simply 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, which are V2X communication applications stored in the storage unit 40. The in-vehicle wireless control unit 50 allocates resources for each one or more applications based on the resource group used by the in-vehicle device 5 in road-to-vehicle communication selected by the road-side device 1 that has performed resource sensing of the entire band available for road-to-vehicle communication. Set the resource group for sensing.

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

The settings management unit 52 stores communication conditions for each application acquired from the communication control unit 51. The setting management unit 52 may create sensing conditions that satisfy all the communication conditions of multiple applications and notify the resource sensing unit 61, or may set the sensing conditions to satisfy the sensing transmission cycles of multiple applications. The resource sensing unit 61 may be notified of the shift.

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

Note that regarding communication conditions other than sensing, the communication control unit 51 outputs the communication conditions to the setting management unit 52 when acquiring transmission data, transmission instructions, etc. from the applications 41 and 42. The communication conditions other than sensing are used by the communication signal processing unit 63 to set the processing described below.

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

FIG. 6 is a flowchart showing the operation of the in-vehicle device 5 according to the first embodiment. In the vehicle-mounted device 5, when the vehicle 4 on which the vehicle-mounted device 5 is mounted enters the communication parameter notification area 2 of the roadside device 1, the communication signal processing unit 63 of the wireless communication unit 60 processes the communication parameters notified from the roadside 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 stores the acquired communication parameters. Thereby, the in-vehicle device 5 sets the communication parameters inside the in-vehicle device 5 (step S122).

The sensing parameter setting unit 53 determines parameters to be set in the resource sensing unit 61 and notifies them based on the sensing conditions, communication conditions such as transmission cycle, and communication parameters stored in the setting management unit 52. The resource sensing unit 61 performs resource sensing based on the notification from the sensing parameter setting unit 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 parameters based on the sensing result obtained by the resource sensing unit 61 (step S123). .

The communication signal processing unit 63 waits until 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 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 notification information for V2I communication (step S124: Yes), the communication signal processing unit 63 transmits notification for V2I communication. The information is output to the communication control section 51. The communication control unit 51 uses the V2I communication application 42 to perform V2I communication with the roadside device 1 (step S125).

Note that the in-vehicle device 5 may receive the broadcast information for V2I communication before securing the resources, but in that case, as soon as the resources are secured, the vehicle-mounted device 5 receives the broadcast information for the roadside based on the reception result of the latest broadcast information for V2I communication. A response is made to device 1.

Furthermore, in the flowchart shown in FIG. 6, a case has been described in which the roadside device 1 triggers the start of V2I communication, but it is also possible for the in-vehicle device 5 to trigger the start of V2I communication. For example, step S124 may be deleted from the flowchart shown in FIG. 6, 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. In this case, the roadside device 1 may also include the position information of the V2I communication area 3 in the communication parameters notified in the communication parameter notification area 2.

Furthermore, when there are transmission requests for multiple applications, the in-vehicle device 5 independently secures communication resources for each application. When transmitting multiple applications at the same time, the in-vehicle device 5 may transmit multiple applications at the same time if the wireless communication unit 60 is capable of processing, or the in-vehicle device 5 may transmit multiple applications at the same time if the wireless communication unit 60 can process one. If only applications can be performed, control is performed by the in-vehicle wireless control unit 50 to avoid overlapping. 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 resource sensing to be the range of the resource groups set in each of the plural applications, and sets the sensing range for each of the plural applications. Secure resources. Further, when a plurality of applications operate simultaneously, the in-vehicle wireless control unit 50 prevents resources secured for transmission from overlapping based on the transmission period and number of times of transmission of each of the plurality of applications.

In addition, since the in-vehicle radio control unit 50 knows the periodic timing for applications such as V2V communication that constantly send periodic transmissions, when securing communication resources for V2I communication that is used in the short term, the in-vehicle wireless control unit 50 Secure communication resources so that the transmission timing is different from the transmission timing. For example, if the communication resources for V2V communication are regular transmissions at a 100ms cycle, and the communication resources to be secured for V2I communication are 10 times at a 5ms cycle, the in-vehicle radio control unit 50 transmits V2I during the transmission cycle for V2V communication. Secure communication resources for sending communications. The in-vehicle radio control unit 50 uses the fact that V2I communication secures short-term communication resources to secure resources so as not to overlap based on the transmission cycle of V2V communication. By performing such control, the in-vehicle device 5 can operate such that multiple applications run independently by the in-vehicle wireless control unit 50, and can communicate even in V2I communication that stays in the communication area for a short period of time. It is possible to complete the process, and V2V communication can also be continued.

Furthermore, the communication resources sensed by the roadside device 1 may be the entire channel, or if a resource pool is allocated for road-to-vehicle communication in advance, the allocated resource pool may be used, or the communication resource sensed by the roadside device 1 may be the allocated resource pool. May be specified.

Here, regarding the sensing of the roadside device 1, it may be power sensing, or it may receive the 3GPP standard PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), etc. to understand the resource usage status of other communication devices. You can use one or both.

The resource group used in the explanation so far is a resource pool according to the 3GPP standard, or a resource group obtained by dividing a resource pool into several parts based on 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 the communication parameters and notify the vehicle-mounted device 5 of the resource pool.

In addition, in the present embodiment, the roadside device 1 controls the transmission power by the communication parameter notification unit 20 so that the V2I communication area 3 for performing road-to-vehicle communication is wider than the communication parameter notification area 2 for notifying communication parameters. I'm keeping it small. That is, although the case has been described in which the roadside device 1 adjusts the power to be lower during V2I communication in the V2I communication area 3 than when communicating communication parameters in the communication parameter notification area 2, the present invention is not limited to this. The roadside device 1 uses this method for the purpose of realizing V2I communication by making the communication parameter notification area 2 and the V2I communication area 3 in FIG. 1 the same size without making power adjustments, and reliably securing communication resources. You can also.

Continuing, the hardware configuration of each device of the roadside device 1 will be explained. In the roadside device 1, the network I/F 11 is a communication interface that can communicate with the management center 6 by wire or wirelessly. The wireless communication unit 30 is a wireless module capable of wireless communication with the in-vehicle device 5. The V2I communication control section 10 and the communication parameter notification section 20 are realized by a processing circuit. The processing circuit may be a processor and memory that executes a program stored in memory, or may be dedicated hardware. The processing circuit is also called a control circuit. Note that the wireless communication unit 30 may also be realized by a processing circuit.

FIG. 7 is a diagram illustrating a configuration example of the processing circuit 90 when the processing circuit realizing the roadside device 1 according to the first embodiment is implemented by the processor 91 and the memory 92. 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 includes a processor 91 and a memory 92, each function of the processing circuit 90 is realized 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 a processor 91 reading and executing a program stored in a memory 92. That is, the processing circuit 90 includes a memory 92 for storing a program by which the processing of the roadside device 1 is eventually 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 in which the program is stored, or may be provided by other means such as a communication medium.

The above program includes a first step in which the wireless communication unit 30 performs resource sensing on the entire band available for road-to-vehicle communication, and a first step in which the communication parameter notification unit 20 performs resource sensing on the entire band available for road-to-vehicle communication. A second step of selecting a resource group to be used by the device 5 and notifying the in-vehicle device 5 within the communication area of the roadside device 1 of communication parameters including the selected resource group. It can also be said to be 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 may be a nonvolatile or volatile memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), or EEPROM (registered trademark) (Electrically EPROM). This includes semiconductor memory, magnetic disks, flexible disks, optical disks, compact disks, mini disks, and DVDs (Digital Versatile Discs).

FIG. 8 is a diagram showing an example of the processing circuit 93 in the case where the processing circuit realizing the roadside device 1 according to the first embodiment is configured with 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 of these. applicable. Regarding the processing circuit, a part may be realized by dedicated hardware, and a part may be realized by software or firmware. In this way, the processing circuit can implement each of the above-mentioned functions using dedicated hardware, software, firmware, or a combination thereof.

The hardware configuration of the in-vehicle device 5 is also similar. In the vehicle-mounted 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 wireless control unit 50 is realized by a processing circuit. The processing circuit may be a processor and memory that executes a program stored in memory, or may be dedicated hardware. The processing circuit is also called a control circuit. 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 communicates, and the in-vehicle device 5 uses resource sensing to 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 transmits communication parameters to the on-vehicle device 5 in the communication parameter notification area 2. to notify. In addition, when communicating an application for V2I communication, that is, in V2I communication area 3, the roadside device 1 lowers the transmission power than when notifying communication parameters in communication parameter notification area 2, and performs V2I communication only in the necessary area. conduct. Thereby, the road-to-vehicle communication system 8 can efficiently adjust the communication area of the roadside device 1 and secure resources in V2I communication. The roadside device 1 can suppress interference in road-to-vehicle communication with an on-vehicle device 5 mounted on a vehicle 4, which is a mobile object, and secures resources through sensing, and can also suppress interference in road-to-vehicle communication 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 band available for road-to-vehicle communication, and selects a resource group to be used by the on-vehicle device 5 in road-to-vehicle communication based on the sensing result of the resource sensing. , the communication parameters including the selected resource group are notified to the in-vehicle 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 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 the road-to-vehicle communication system 8a according to the second embodiment. The road-to-vehicle communication system 8a includes

roadside devices

1a and 1b, on-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. The in-vehicle device 5 has the same configuration as the in-vehicle device 5 of the first embodiment. In the following description, the

roadside devices

1a and 1b may be referred to as the roadside device 1 if not distinguished, and the

vehicles

4c, 4d, 4e, and 4f may be referred to as the vehicle 4 if not distinguished. Communication parameter notification area 2a and V2I communication area 3a are communication areas generated by roadside device 1a, and communication parameter notification area 2b and V2I communication area 3b are communication areas generated by 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 that realizes 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 in which vehicles 4 entering and leaving the management area 7 are managed by

roadside devices

1a and 1b.

Here, it is assumed that each vehicle 4 regularly transmits BM using V2V communication. The vehicle 4c travels and enters the management area 7. The roadside device 1a performs V2I communication with the on-vehicle device 5 mounted on the vehicle 4c when the vehicle 4c enters the V2I communication area 3a, and acquires information such as identification information of the vehicle 4c from the vehicle 4c, The acquired information is notified to the management center 6a. The vehicle 4c continues to drive, and within the management area 7, it transmits a BM including location information to other vehicles 4 via V2V communication, and receives a BM including location information of the other vehicle 4 from the other vehicle 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 to drive and leaves the management area 7, the roadside device 1b performs V2I communication with the on-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 when the vehicle 4c leaves the management area 7 is the position of the vehicle 4f in FIG.

The operation of the

roadside devices

1a and 1b in such a situation shown in FIG. 9 is similar to 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 resource groups selected by each connected roadside device 1. The management center 6a prevents interference by, for example, changing the sensing range of the roadside device 1 when the roadside devices 1 located near the installation location select the same resource group for V2I communication. For V2V communication used in the entire management area 7, the management center 6a sets the resource group that is not selected for V2I communication by each roadside device 1 as a resource group for V2V communication. The roadside device 1a is notified. The roadside device 1a located at the entrance of the management area 7 notifies the communication parameter notification area 2a of communication parameters including resource group information for V2V communication based on the notification from the management center 6a.

Note that although the connection method between the

roadside devices

1a, 1b and the management center 6a is a wired connection in FIG. Alternatively, indirect wireless connection may be made via a base station (not shown) or the like.

FIG. 10 is a flowchart 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 in 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 management center 6a of the selected resource group via the notification control unit 23, communication signal processing unit 33, V2I communication control unit 10, and network I/F 11. do. Although not shown in FIG. 3, the communication parameter generation unit 22 transmits the selected resource group to the notification control unit 23 and the network I/F 11 when the notification control unit 23 and the network I/F 11 can directly transmit and receive information. The management center 6a may be notified via the network I/F 11.

Note that the

roadside devices

1a and 1b periodically perform the operation shown in the flowchart shown in FIG. 10, just as the roadside device 1 of Embodiment 1 periodically performs the operation shown in the flowchart shown in FIG. That is, the

roadside devices

1a and 1b periodically perform resource sensing of the entire available band in step S101 in the resource sensing unit 31, and periodically select a resource group in the resource group selection unit 21 in step S102. Become. Therefore, each time a resource group is selected in step S102, the

roadside devices

1a and 1b may notify the management center 6a in step S113, or the resource group selected in step S102 may be changed due to a change in the surrounding situation. Only when this happens, the management center 6a may be notified in step S113.

Next, the configuration and operation of the management center 6a will be explained. FIG. 11 is a diagram showing a configuration example of the management center 6a according to the second embodiment. The management center 6a includes a network I/F 70, a resource group information storage section 71, a resource management section 72, and an 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 information on the resource group selected by each roadside device 1, which is notified and acquired from each roadside device 1.

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

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

The intra-area resource information management unit 73 determines the roadside device 1 that will notify the vehicles 4 of the resource groups commonly used within the management area 7, and provides information on the resource groups commonly used within the management area 7, each Control is performed to distribute information on resources sensed by the roadside device 1 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 it is a general process, the explanation will be omitted. The processing of the V2I communication itself is, for example, processing related to management of the vehicle 4 in the case of entry/exit management, and changes depending on the V2I communication.

The hardware configuration of the management center 6a will be explained. In the management center 6a, the network I/F 70 is a communication interface that can communicate with the roadside device 1 by wire or wirelessly. The resource group information storage unit 71 is a memory. The resource management section 72 and the intra-area resource information management section 73 are realized by processing circuits. The processing circuit may be a processor and memory that executes a program stored in memory, or may be dedicated hardware. The processing circuit is also called a control circuit.

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 controls the entire management area 7. Place limits on the communication resources of the application used. Thereby, the road-to-vehicle communication system 8a can reduce interference with communication of the roadside device 1 within the management area 7.

The configurations shown in the embodiments above are merely examples, and can be combined with other known techniques, or can be combined with other embodiments, within the scope of the gist. 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 in-vehicle 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

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 over the entire band that can be used in the road-to-vehicle communication;
Based on the sensing result of the resource sensing, a resource group to be used by the in-vehicle device in the road-to-vehicle communication is selected, and a communication parameter including the selected resource group is set to one or more resource groups within the communication area of the roadside device. a communication parameter notification unit that controls setting a resource group for each application and notifying the in-vehicle device that performs resource sensing;
A roadside device comprising:
The communication parameter notification unit controls transmission power to make a first communication area for performing the road-to-vehicle communication smaller than a second communication area for notifying the communication parameters.
The roadside device according to claim 1, characterized in that:
The communication parameter notification unit includes information on transmission power in the road-to-vehicle communication in the communication parameter.
The roadside device according to claim 1 or 2, characterized in that:
The communication parameter notification unit includes, in the communication parameter, at least one of a cycle of resources to be secured, a number of times of resources to be secured, and a period for securing resources.
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 used by the in-vehicle device in the road-to-vehicle communication, a resource group with the most free resources from the entire band available for the road-to-vehicle communication.
The roadside device according to any one of claims 1 to 4.
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 uses the least resources at the highest power level from the entire band available for the road-to-vehicle communication.
The roadside device according to any one of claims 1 to 4.
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 ensure availability in a 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.
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 resource group to be selected.
The roadside device according to any one of claims 1 to 7.
An in-vehicle device that is installed in a mobile device and performs road-to-vehicle communication with a roadside device,
A resource group to be subjected to resource sensing for each of one or more applications is selected based on a resource group used by the in-vehicle device in the road-to-vehicle communication selected by the road-side device that has resource-sensed the entire band available for the road-to-vehicle communication. In-vehicle wireless control unit to be set,
a wireless communication unit that performs resource sensing of the resource group set by the in-vehicle wireless control unit;
An in-vehicle device characterized by comprising:
When a plurality of the applications operate simultaneously, the in-vehicle wireless control unit sets the sensing range of the resource sensing to be the combined range of the resource groups set in each of the plurality of applications, and sets the sensing range for each of the plurality of applications as a sensing range for each of the plurality of applications. secure resources,
The in-vehicle device according to claim 9, characterized in that:
When a plurality of the applications operate simultaneously, the in-vehicle radio control unit prevents resources secured for transmission from overlapping based on the transmission cycle and the number of times of transmission of each of the plurality of applications.
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 installed in a mobile device and a roadside device perform road-to-vehicle communication,
Resource sensing the entire band available for the 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 communicating including 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 a roadside device that performs road-to-vehicle communication with an in-vehicle device mounted on a mobile device, the control circuit comprising:
Resource sensing of the entire band available for road-to-vehicle communication;
Based on the sensing result of the resource sensing, a resource group to be used by the in-vehicle device in the road-to-vehicle communication is selected, and a communication parameter including the selected resource group is set to one or more resource groups within the 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 that causes the roadside device to perform the following.
A control circuit for controlling an in-vehicle device installed in a mobile device and performing road-to-vehicle communication with a roadside device,
A resource group to be subjected to resource sensing for each of one or more applications is selected based on a resource group used by the in-vehicle device in the road-to-vehicle communication selected by the road-side device that has resource-sensed the entire band available for the road-to-vehicle communication. setting,
Resource sensing the configured resource group,
A control circuit that causes the in-vehicle device to perform the following.
A storage medium storing a program for controlling a roadside device that performs road-to-vehicle communication with an in-vehicle device mounted on a mobile device,
The program is
Resource sensing of the entire band available for road-to-vehicle communication;
Based on the sensing result of the resource sensing, a resource group to be used by the in-vehicle device in the road-to-vehicle communication is selected, and a communication parameter including the selected resource group is set to one or more resource groups within the 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 perform the following.
A storage medium storing a program for controlling an in-vehicle device installed in a mobile device and performing road-to-vehicle communication with a roadside device,
The program is
A resource group to be subjected to resource sensing for each of one or more applications is selected based on a resource group used by the in-vehicle device in the road-to-vehicle communication selected by the road-side device that has resource-sensed the entire band available for the road-to-vehicle communication. setting,
Resource sensing the configured resource group,
A storage medium characterized in that the in-vehicle device performs the following.
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, the method comprising:
a first step in which the wireless communication unit performs resource sensing of the entire band available for the road-to-vehicle communication;
A communication parameter notification unit selects 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 transmits communication parameters including the selected resource group within the communication area of the roadside device. a second step of controlling to set a resource group for each one or more applications and to notify the in-vehicle device that performs resource sensing;
A road-to-vehicle communication method comprising:
A road-to-vehicle communication method for a vehicle-mounted device installed in a mobile device and performing road-to-vehicle communication with a roadside device,
The in-vehicle wireless control unit performs resource sensing on the entire band available for the road-to-vehicle communication based on the resource group used by the in-vehicle device in the road-to-vehicle communication selected by the roadside device for each of one or more applications. A first step of configuring a resource group for resource sensing;
a second step in which the 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, the program comprising:
a first step of resource sensing the entire band available for the road-to-vehicle communication;
Based on the sensing result of the resource sensing, a resource group to be used by the in-vehicle device in the road-to-vehicle communication is selected, and a communication parameter including the selected resource group is set to one or more resource groups within the communication area of the roadside device. a second step of setting a resource group for each application and controlling the notification to the in-vehicle device that performs resource sensing;
A road-to-vehicle communication program that causes a computer to perform the following.
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,
A resource group to be subjected to resource sensing for each of one or more applications is selected based on a resource group used by the in-vehicle device in the road-to-vehicle communication selected by the road-side device that has resource-sensed the entire band available for the road-to-vehicle communication. The first step is to configure
a second step of resource sensing the configured resource group;
A road-to-vehicle communication program that causes a computer to perform the following.