WO2023199405A1

WO2023199405A1 - Mobile station, control circuit, and storage medium

Info

Publication number: WO2023199405A1
Application number: PCT/JP2022/017607
Authority: WO
Inventors: 周作梅田; 麻里落合; 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: 2022-04-12
Filing date: 2022-04-12
Publication date: 2023-10-19
Also published as: JPWO2023199405A1

Abstract

Provided is a mobile station (10) characterized by comprising: a wireless communication unit (110) that wirelessly communicates, through a direct connection or a relay connection via another communication device, with a destination device; and an application server unit (111) that performs higher layer processing than the wireless communication unit (110), wherein the wireless communication unit (110) notifies the application server unit (111) of connection state information that is information for specifying the type of connection and the destination device, when starting the connection with the destination device and when the type of connection switches between the relay connection and the direct connection.

Description

Mobile station, control circuit, and storage medium

The present disclosure relates to a mobile station that performs wireless communication, a control circuit, and a storage medium.

In recent years, autonomous driving technology for moving objects such as cars and robots has progressed. Furthermore, in order to provide different functions depending on the position of the moving body, it is conceivable to change the control content depending on the position. One way to change the control content depending on the location is to use wireless communication to perform specific control when connected to a predetermined device such as a specific roadside device. is possible. Non-Patent Document 1 discloses a wireless communication technology used in the field of automatic driving.

However, according to the above conventional technology, if pre-processing before performing specific control takes time, there is a problem that it takes time to start specific control after connecting with a predetermined device. was there. Non-Patent Document 1 describes a technology that enables communication with a destination device by performing a relay connection via another communication device even in a location where direct connection to the destination device is not possible. By using this, it is possible to start pre-processing before moving to a location where it can be directly connected to the destination device.

However, in the technology disclosed in Non-Patent Document 1, the upper system can communicate with the lower system without being aware of it, so the application for realizing specific control requires relay connection. It is not possible to determine whether the destination device is connected by a direct connection or by a direct connection.

The present disclosure has been made in view of the above, and aims to provide a mobile station that allows an application to determine whether the type of connection with a destination device is a relay connection or a direct connection. shall be.

In order to solve the above-mentioned problems and achieve the objectives, a mobile station according to the present disclosure is a mobile station that is mobile and that communicates wirelessly with a destination device directly or by relay connection via another communication device. The wireless communication unit includes a communication unit and an application server unit that performs processing of a layer higher than the wireless communication unit, and the wireless communication unit is configured to perform processing when starting a connection with a destination device and whether the type of connection is a relay connection or a direct connection. When switching between the two, the application server unit is notified of connection status information, which is information for specifying the type of connection and the destination device.

The mobile station according to the present disclosure has the effect of allowing an application to determine whether the type of connection with a destination device is a relay connection or a direct connection.

A diagram showing the configuration of a wireless communication system according to Embodiment 1 Diagram showing the functional configuration of the mobile station shown in Figure 1 Sequence diagram for explaining the operation of the wireless communication system shown in FIG. 1 Sequence diagram for explaining the operation of the wireless communication system according to the second embodiment Sequence diagram for explaining the operation of the wireless communication system according to the third embodiment A diagram showing dedicated hardware for realizing the functions of the mobile station according to Embodiments 1 to 3. A diagram showing the configuration of a control circuit for realizing the functions of the mobile station according to Embodiments 1 to 3.

Below, a mobile station, a control circuit, and a storage medium according to an embodiment of the present disclosure will be described in detail based on the drawings.

Embodiment 1.
FIG. 1 is a diagram showing the configuration of a wireless communication system 1 according to the first embodiment. The wireless communication system 1 is, for example, a fifth generation (hereinafter sometimes referred to as "5G") wireless communication system. The wireless communication system 1 includes a mobile station 10, a roadside device 12 having an edge server 11, and roadside devices 13-a to 13-d that are connected by relay between the mobile station 10 and the roadside device 12. Hereinafter, when there is no need to distinguish each of the roadside machines 13-a to 13-d, they will be simply referred to as roadside machines 13.

The mobile station 10 has a function of wirelessly communicating with the roadside device 12 and the roadside device 13. The mobile station 10 connects directly to the roadside device 12 when it is in a position where it can be directly connected to the roadside device 12; when it is in a position where it cannot be directly connected to the roadside device 12, the mobile station Relay connection is made to the roadside device 12.

FIG. 2 is a diagram showing the functional configuration of the mobile station 10 shown in FIG. 1. Mobile station 10 includes a wireless communication section 110 and an application server section 111. The wireless communication unit 110 communicates with the

roadside devices

12 and 13 by direct connection or relay connection via the 5G wireless communication network.

The application server unit 111 implements specific control using an application 113 (not shown) that operates in cooperation with the edge server 11 provided in the roadside machine 12. Specific control is, for example, control that is executed when the mobile station 10 is located at a location where it can be directly connected to the roadside device 12, and is executed when the mobile station 10 is located at a location where it cannot be directly connected to the roadside device 12. This control is different from the control that The application server unit 111 performs processing using a protocol at a higher layer than the protocol used by the wireless communication unit 110 to communicate with the

roadside devices

12 and 13. The protocol used by the application server unit 111 allows communication without being aware of operations in lower layers. Therefore, within the application 113, it is not possible to determine whether the wireless communication unit 110 is directly connected to the destination device or connected by relay. Therefore, in the first embodiment, it is assumed that the wireless communication unit 110 notifies the application server unit 111 of connection status information, which is information for specifying the type of connection and the destination device.

FIG. 3 is a sequence diagram for explaining the operation of the wireless communication system 1 shown in FIG. 1. The wireless communication unit 110 of the mobile station 10 transmits a connection request to the roadside device 12, which is the destination device (step S101). In response to the connection request, the roadside device 13 connects with each of the wireless communication unit 110 and the roadside device 12 of the mobile station 10 and functions as a relay roadside device, thereby starting a relay connection (step S102).

When the wireless communication unit 110 of the mobile station 10 connects with the roadside device 13 for relay connection, it notifies the application server unit 111 of connection state information indicating that the relay connection is established with the roadside device 12 (step S103). The connection state information is information for specifying the type of connection and the destination device, and the wireless communication unit 110 determines when starting a connection with the destination device and whether the type of connection is a relay connection or a direct connection. Notifies connection status information when switching between

The application server unit 111 can control the operation of the mobile station 10 based on the connection state information. Based on the connection state information, if the destination device is a predetermined roadside device 12 and preliminary processing for starting specific control has not been performed yet, the application server unit 111 downloads the application 113 necessary for specific control. It is activated (step S104) and performs pre-processing with the edge server 11 (step S105). Pre-processing is processing performed before performing specific control, and includes, for example, authentication processing. Further, the pre-processing may include, for example, processing of acquiring data used when performing specific control from the edge server 11.

When the mobile station 10 moves, the distance between the roadside machine 12 and the mobile station 10 changes. When the mobile station 10 approaches the roadside device 12 and moves to a position where it can be directly connected to the roadside device 12, a direct connection is started between the mobile station 10 and the roadside device 12 (step S106). The wireless communication unit 110 of the mobile station 10 notifies the application server unit 111 of connection state information indicating that the type of connection with the roadside device 12 has been switched to direct connection (step S107).

The application server unit 111 notifies the edge server 11 of the roadside device 12 of the start of specific control based on the connection status information notified in step S107 (step S108), and the mobile station 10 receives the instruction from the edge server 11. Achieve a specific action.

As described above, according to the first embodiment, when the wireless communication unit 110 of the mobile station 10 starts a connection with the roadside device 12 which is a destination device, and when the type of connection is a relay connection or a direct connection, , the application server unit 111 is notified of connection status information, which is information for specifying the type of connection and the destination device. With such a configuration, the application server unit 111 of the mobile station 10 can grasp whether the type of connection is a relay connection or a direct connection. Therefore, it is possible to perform preprocessing, which is preparation before starting specific control, before the mobile station 10 can connect directly to the roadside device 12, at the stage of relay connection. . Therefore, when the mobile station 10 moves to a position where it can directly connect to the roadside device 12, it is possible to finish the preliminary processing, and it is possible to shift to specific control immediately after the direct connection. become.

Embodiment 2.
The configuration of the wireless communication system 1 according to the second embodiment is similar to the configuration of the first embodiment shown in FIG. 1, and the configuration of the mobile station 10 is the same as the configuration of the mobile station 10 according to the first embodiment shown in FIG. The same is true. FIG. 4 is a sequence diagram for explaining the operation of the wireless communication system 1 according to the second embodiment.

The operation shown in FIG. 4 starts from a state in which specific control is started between the application server section 111 of the mobile station 10 and the edge server 11 of the roadside machine 12, as shown in step S108. After the mobile station 10 is directly connected to the roadside device 12, it executes specific control. After that, when the mobile station 10 moves away from the roadside device 12 and direct connection is no longer possible, the relay connection via the roadside device 13 starts again in the connection between the mobile station 10 and the roadside device 12. (Step S109). At this time, the wireless communication unit 110 of the mobile station 10 notifies the application server unit 111 of connection state information indicating that the type of connection with the roadside device 12 has been switched from direct connection to relay connection (step S110). .

The application server unit 111 terminates the specific control by terminating the running application 113 according to the connection state information notified in step S110 (step S111), and notifies the edge server 11 of the termination of the specific control. (Step S112).

As explained above, according to the second embodiment, the application 113 is terminated at the timing when the type of connection between the mobile station 10 and the roadside device 12 is switched from a direct connection to a relay connection, thereby establishing a direct connection. It becomes possible to end the specific control at the timing of switching from to relay connection. Therefore, it is possible to implement application control that starts specific control at the timing of switching to direct connection with the roadside device 12 and ends specific control at the timing of switching from direct connection to relay connection.

Embodiment 3.
The configuration of the wireless communication system 1 according to the third embodiment is the same as that of the first embodiment shown in FIG. 1, and the configuration of the mobile station 10 is the same as that of the mobile station 10 according to the first embodiment shown in FIG. be. FIG. 5 is a sequence diagram for explaining the operation of the wireless communication system 1 according to the third embodiment.

The operation shown in FIG. 5 starts from a state in which specific control is started between the application server section 111 of the mobile station 10 and the edge server 11 of the roadside machine 12, as shown in step S108. After the mobile station 10 is directly connected to the roadside device 12, it executes specific control. After that, when the mobile station 10 moves away from the roadside device 12 and direct connection is no longer possible, the relay connection via the roadside device 13 starts again in the connection between the mobile station 10 and the roadside device 12. (Step S109). At this time, the wireless communication unit 110 of the mobile station 10 notifies the application server unit 111 of connection status information indicating that the connection with the roadside device 12 has been switched from a direct connection to a relay connection (step S110).

After that, when the mobile station 10 moves further toward the roadside device 12 and direct connection becomes possible again, direct connection is started again between the mobile station 10 and the roadside device 12 (step S113). . At this time, the wireless communication unit 110 of the mobile station 10 notifies the application server unit 111 of connection status information indicating that the type of connection with the roadside device 12 has been switched from relay connection to direct connection (step S114). .

The application server unit 111 terminates the specific control by terminating the running application 113 in accordance with the connection status information notified in step S114 (step S115), and notifies the edge server 11 of the termination of the specific control. (Step S116). At this time, the application server unit 111 executes termination processing such as discarding information used for specific control.

As described above, according to the third embodiment, after the type of connection between the mobile station 10 and the roadside device 12 is switched from a direct connection to a relay connection, the application 113 By terminating the specific control, it becomes possible to terminate the specific control at the timing of switching from relay connection to direct connection. Therefore, it is possible to realize application control that starts specific control at the timing of switching to direct connection with the roadside device 12, switches from direct connection to relay connection, and ends specific control at the timing of switching to direct connection again. .

The control shown in Embodiment 3 can be applied, for example, to a situation where an entrance is provided in a specific area where specific control is to be performed, and a roadside machine 12 connected to the edge server 11 is installed at the entrance. It can be used in It is conceivable that the mobile station 10 enters a specific area through an entrance, goes around the premises of the particular area, and returns to the entrance. In this case, when the mobile station 10 attempts to enter a specific area from the entrance/exit, it switches from relay connection to direct connection as soon as it approaches the entrance, and while it is circling around the premises of the specific area, it switches from direct connection to relay connection, and when moving When station 10 returns to the entrance/exit, it is assumed that the connection will switch back to direct connection. According to the control shown in Embodiment 3, when the mobile station 10 enters the specific area from the entrance/exit, the specific control is started, and the specific control is ended when the mobile station 10 returns to the entrance/exit and connects directly with the roadside device 12. becomes possible.

Next, the hardware configuration of the mobile station 10 according to the first to third embodiments will be explained. The functions of the wireless communication section 110 and the application server section 111 of the mobile station 10 are realized by a processing circuit. Regarding the wireless communication unit 110, the processing circuit may be realized by dedicated hardware or may be a control circuit using a CPU (Central Processing Unit). Regarding the application server unit 111, the processing circuit is a control circuit using a CPU.

When the above processing circuits are realized by dedicated hardware, they are realized by the processing circuit 90 shown in FIG. 6. FIG. 6 is a diagram showing dedicated hardware for realizing the functions of the mobile station 10 according to the first to third embodiments. The processing circuit 90 is 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.

When the above processing circuit is realized by a control circuit using a CPU, this control circuit is, for example, a control circuit 91 having the configuration shown in FIG. 7. FIG. 7 is a diagram showing the configuration of a control circuit 91 for realizing the functions of the mobile station 10 according to the first to third embodiments. As shown in FIG. 7, the control circuit 91 includes a processor 92 and a memory 93. The processor 92 is a CPU, and is also called an arithmetic unit, microprocessor, microcomputer, DSP (Digital Signal Processor), or the like. The memory 93 is, for example, a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (registered trademark) (Electrically EPROM), These include magnetic disks, flexible disks, optical disks, compact disks, mini disks, and DVDs (Digital Versatile Disks).

When the above processing circuit is implemented by the control circuit 91, it is implemented by the processor 92 reading and executing a program stored in the memory 93 that corresponds to the processing of each component. The memory 93 is also used as a temporary memory in each process executed by the processor 92. Note that the program executed by the processor 92 may be provided in a state stored in a storage medium, or may be provided via a communication path.

Note that the processing circuit may be realized by combining dedicated hardware and a control circuit using a CPU.

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.

For example, the mobile station 10 may be a mobile terminal whose position changes as a person moves while carrying it, or a mobile station such as a vehicle such as a car or a train, or a mobile object such as a robot. Good too. When the mobile station 10 is a mobile body and has an automatic driving function, the above implementation is performed in order to perform automatic driving at a higher level only in a specific area where it can be directly connected to the roadside unit 12 than in other areas. It is conceivable to use the technique described in the embodiment. In this case, the specific control is a control that deploys dynamic map information and operation instruction information to the application server unit 111 and causes a higher level of automatic driving to be performed in a specific area than in other areas.

Furthermore, in the above embodiment, the communication partner devices of the mobile station 10 are the

roadside machines

12 and 13, but the communication partner devices of the mobile station 10 are not limited to the

roadside machines

12 and 13. The communication partner device of the mobile station 10 only needs to have a wireless communication function. For example, the communication partner device of the mobile station 10 is not limited to the

roadside devices

12 and 13, but may be a base station.

1 Wireless communication system, 10 Mobile station, 11 Edge server, 12, 13, 13-a to 13-d Roadside machine, 90 Processing circuit, 91 Control circuit, 92 Processor, 93 Memory, 110 Wireless communication section, 111 Application server section , 113 Application.

Claims

A movable mobile station,
a wireless communication unit that wirelessly communicates with a destination device by direct connection or by relay connection via another communication device;
an application server unit that performs processing of a layer higher than the wireless communication unit;
Equipped with
The wireless communication unit includes information for identifying the type of connection and the destination device when starting a connection with the destination device and when the type of connection is switched between a relay connection and a direct connection. A mobile station characterized in that it notifies the application server unit of certain connection state information.
The application server unit performs specific control when the wireless communication unit directly connects with the predetermined device from the control performed when the wireless communication unit cannot directly connect with the predetermined device, and Based on connection state information, if the destination device is the predetermined device and the type of connection is a relay connection, preprocessing is started before executing the specific control. The mobile station according to item 1.
The application server section performs the specific control according to the connection state information notified at the timing when the type of connection between the wireless communication section and the predetermined device is switched from a direct connection to a relay connection. The mobile station according to claim 2, characterized in that the mobile station is terminated.
The application server unit is configured to detect the connection, which is notified at the timing when the type of connection between the wireless communication unit and the predetermined device switches from a direct connection to a relay connection, and further switches from the relay connection to a direct connection. The mobile station according to claim 2, wherein the specific control is terminated depending on state information.
a wireless communication unit that wirelessly communicates with a destination device by direct connection or by relay connection via another communication device;
an application server unit that performs processing of a layer higher than the wireless communication unit;
A control circuit for controlling a mobile mobile station, comprising:
When the wireless communication unit starts a connection with the destination device and when the connection type is switched between a relay connection and a direct connection, information for identifying the connection type and the destination device is provided. a step of notifying the application server section of certain connection state information;
A control circuit that causes the mobile station to execute.
a wireless communication unit that wirelessly communicates with a destination device by direct connection or by relay connection via another communication device;
an application server unit that performs processing of a layer higher than the wireless communication unit;
A storage medium storing a program for controlling a movable mobile station, the program comprising:
When the wireless communication unit starts a connection with the destination device and when the connection type is switched between a relay connection and a direct connection, information for identifying the connection type and the destination device is provided. a step of notifying the application server section of certain connection state information;
A storage medium that causes the mobile station to execute the following.