WO2019049580A1

WO2019049580A1 - Station-to-car communication system and control method

Info

Publication number: WO2019049580A1
Application number: PCT/JP2018/029507
Authority: WO
Inventors: 伸彦荒新
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2017-09-05
Filing date: 2018-08-07
Publication date: 2019-03-14

Abstract

This station-to-car communication system is provided with: a first wireless machine; a second wireless machine that communicates with the first wireless machine and is installed in a car; a third wireless machine that communicates with the second wireless machine and is installed in a station at which the car stops; and a control device that controls the first wireless machine and the third wireless machine. The control device transmits encrypted information to the first wireless machine and the third wireless machine, and the second wireless machine receives the encrypted information from the first wireless machine and starts encrypted communication with the third wireless machine using the encrypted information without performing authentication processing.

Description

Station inter-vehicle communication system and control method

The present invention relates to a station-to-vehicle communication system and a control method thereof.

As disclosed in Patent Document 1, a conventional station-to-vehicle communication system transmits an image for safety monitoring on the side of a vehicle to a cab monitor beside the cab until the train breaks through the platform, and the one-man system In what performs departure monitoring, images of passengers in and out of the train are photographed by a plurality of cameras installed on the platform, and the video signals are transmitted from the transmitter to the reception means on the train side by radio waves, and the images are Is displayed on the monitor of In this case, a plurality of reception means are provided on the train side, the transmission radio waves from one transmission apparatus are received by the plurality of reception means, the received radio wave strengths are compared, and the monitor is automatically switched to a strong one to monitor Apparatus and method for displaying an image by

JP 2003-104203 A

The present disclosure makes it possible to transmit data transmitted from the platform of a station at which the vehicle stops or passes to the vehicle before the vehicle enters the platform, and to secure the data between stations for exchanging data. To provide a communication system.

The station-to-vehicle communication system in the present disclosure communicates between the first radio and the first radio, and communicates between the second radio installed on the vehicle and the second radio. A third radio installed at a station at which the vehicle stops and a control device for controlling the first radio and the third radio. The control device transmits the encrypted information to the first wireless device and the third wireless device, and the second wireless device receives the encrypted information from the first wireless device, and performs an authentication process with the third wireless device. The encryption communication is started using the encryption information without performing.

In the station-to-vehicle communication system, the control method according to the present disclosure includes a first radio, a second radio installed in a vehicle, and a third radio installed in a station at which the vehicle stops. It is a control method which controls 1 radio and 3rd radio. The control method includes the steps of: a first wireless device initiating a communication connection with a second wireless device; transmitting encrypted information to the first wireless device and the third wireless device; and the first wireless device Transmitting the received encrypted information to the second wireless device, and the third wireless device performs encrypted communication using the received encrypted information without performing authentication processing with the second wireless device. And starting.

The station-to-vehicle communication system in the present disclosure can transmit data transmitted from the platform to the vehicle from before the vehicle enters the platform, and can exchange data while securing security.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view which shows an example of the station inter-vehicle communication system 1 which concerns on embodiment. It is a block diagram which shows an example of the radio | wireless communication by the side of the vehicle of the station inter-vehicle communication system 1 which concerns on embodiment. It is a block diagram which shows an example of the radio | wireless communication by the side of the platform of the station inter-vehicle communication system 1 which concerns on embodiment. It is a schematic diagram showing an example of operation of station inter-vehicle communication system 1 concerning an embodiment. It is a flowchart which shows an example of operation | movement in the 2nd radio | wireless machine 20 of the station inter-vehicle communication system 1 which concerns on embodiment. It is a flowchart which shows an example of operation | movement in the control apparatus 40 of the station inter-vehicle communication system 1 which concerns on embodiment.

(Circumstances for obtaining one aspect of the present disclosure)
When a wireless device installed in a vehicle and a wireless device installed in a platform of a station at which the vehicle stops or passes wirelessly, connection processing in which the wireless devices exchange signals for wireless connection I do. When wireless connection is performed, in addition to connection processing, authentication processing for performing encrypted communication such as WPA2 / 4 way-HandShake is performed. This allows the radio installed in the vehicle to receive the encrypted data from the radio installed in the platform.

However, when performing encrypted communication between the wireless device installed in the vehicle and the wireless device installed in the platform, two processes of connection processing and authentication processing must be performed.

Therefore, for example, when the crew of the vehicle wants to acquire the image of the platform before the vehicle enters the platform, there is a possibility that the data of the image of the platform can not be acquired because the termination of the two processes of connection processing and authentication processing is delayed. is there.

A station-to-vehicle communication system according to one aspect of the present invention includes a first wireless device, a second wireless device installed in a vehicle, a third wireless device installed in a platform, a first wireless device, and a second wireless device. , And a controller for controlling the third radio. The first wireless device and the second wireless device perform connection processing for communication between the first wireless device and the second wireless device and authentication processing for performing encrypted communication. The control device transmits, to the first wireless device and the third wireless device, encryption information for performing encrypted communication without the second wireless device and the third wireless device performing authentication processing. The second wireless device receives the encrypted information from the first wireless device, and uses the encrypted information to initiate encrypted communication with the third wireless device.

According to this configuration, the wireless device installed in the vehicle has the information necessary for the encrypted communication with the wireless device installed in the platform before performing the connection process with the wireless device installed in the platform It is possible to perform encrypted communication with the wireless device installed on the platform without performing an authentication process. Thus, when performing encrypted communication between the wireless device installed in the vehicle and the wireless device installed in the platform, encrypted communication can be performed if connection processing is performed only, and encrypted communication can be performed quickly. It can be performed.

Therefore, the station-to-vehicle communication system according to an aspect of the present invention can transmit data to the data transmitted from the platform to the vehicle without erroneous connection, and before the vehicle enters the platform. Security can be secured to exchange data.

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, the detailed description may be omitted if necessary. For example, detailed description of already well-known matters and redundant description of substantially the same configuration may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art.

It should be noted that the attached drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and they are not intended to limit the claimed subject matter.

Embodiment
Hereinafter, an embodiment will be described using FIGS. 1 to 6.

[1. Constitution]
FIG. 1 is an external view showing an example of a station-to-vehicle communication system 1 according to the embodiment.

The station-to-vehicle communication system 1 includes a first radio 10, a second radio 20, and a third radio 30.

The first radio 10 performs radio communication with the second radio 20. The first radio 10 is installed, for example, in the vicinity of a branch line existing in the vicinity of the platform, in the vicinity of a traffic signal existing in the vicinity of the platform, or the like.

The second radio 20 performs radio communication with the first radio 10 and the third radio 30. The second wireless device 20 is installed in the vehicle 50.

The third wireless device 30 performs wireless communication with the second wireless device 20. The third wireless device 30 is installed at a position different from that of the first wireless device 10, and is disposed, for example, on a station platform. In addition, the third wireless device 30 is communicably connected to a camera 60 that captures an image of a person getting on and off the vehicle 50 in the platform, and transmits video data captured by the camera 60 to the second wireless device 20.

The data transmitted by the third wireless device 30 to the second wireless device 20 is not limited to this, and may be, for example, information on the platform such as information indicating the congestion status of the platform, information with an emergency on the platform, etc. May be

A plurality of third radios 30 may be installed in the platform. For example, as in the case of the third radio 3010, the third radio 3020, the third radio 3030, and the third radio 3040 in FIG. Also, in the camera 60, a plurality of vehicles 50 are installed according to the pattern of entering the platform, such as the camera 61, the camera 62, the camera 63, and the camera 64. In this case, the third wireless device 3010 is connected to the camera 61 to construct a wireless network 3010 N, and the third wireless device 3020 is connected to the camera 62 to construct a wireless network 3020 N. Similarly, in another platform, the third radio 3030 is connected with the camera 63 to build a wireless network 3030N, and the third radio 3040 is connected with the camera 64 to build a wireless network 3040N.

The control device 40 is communicably connected to the first wireless device 10, the second wireless device 20, and the third wireless device 30, and includes the first wireless device 10, the second wireless device 20, and the third wireless device 30. Control. Specifically, it instructs the first radio 10 to connect to the second radio 20, and instructs the second radio 20 to connect to the third radio 30. For example, a computer or the like is used as the control device 40. The control device 40 performs a control operation by the CPU executing a program stored in a storage device such as a memory. The control device 40 is installed, for example, in a management room that manages the entire platform, a control room that manages the operation of a vehicle, and the like.

FIG. 2 is a block diagram showing an example of the communication system 2 on the vehicle side in the station-to-vehicle communication system 1 according to the embodiment.

The communication system 2 on the vehicle side has a first radio 10, a second radio 20, and a control device 40.

The first wireless device 10 includes an antenna unit 11 and a wireless control unit 12.

The antenna unit 11 wirelessly communicates with the second radio 20 and the control device 40. Specifically, the antenna unit 11 includes an antenna, and transmits / receives data (packets) to / from the second radio 20 and the control device 40 by wireless communication using the antenna.

The wireless control unit 12 controls the antenna unit 11. Specifically, the wireless control unit 12 controls radio waves transmitted from the antenna. For example, an IC chip or the like is used for the wireless control unit.

The control device 40 includes an antenna unit 41 and an encryption information control unit 42.

The antenna unit 41 wirelessly communicates with the first radio 10 and the third radio 30. Specifically, the antenna unit 41 includes an antenna, and transmits / receives data (packets) to / from the first radio 10 and the third radio 30 by wireless communication using the antenna.

The encryption information control unit 42 controls transmission of the encryption information. Here, the encryption information is information such as an SSID and an encryption key to be used when performing connection and encryption communication between the second wireless device 20 and the third wireless device 30. Note that, for example, an IC chip or the like is used for the encryption information control unit 42.

As a communication system 2 on the vehicle side, a second wireless device 20, a communication control unit 70, an encrypted information holding unit 80, and a monitor 90 are provided in the vehicle 50.

The second radio 20 has an antenna unit 21 and a radio control unit 22.

The antenna unit 21 communicates with the first wireless device 10, the third wireless device 30, and the control device 40 using wireless communication. Specifically, the antenna unit 21 includes an antenna, and transmits / receives data (packets) to / from the first radio 10, the third radio 30, and the controller 40 by wireless communication using the antenna.

The wireless control unit 22 controls the antenna unit 21. Specifically, the wireless control unit 22 controls radio waves in the antenna unit 21. Note that, for example, an IC chip or the like is used for the wireless control unit 22.

The communication control unit 70 controls the entire second radio 20. Specifically, the communication control unit 70 performs connection processing for connecting to the first radio 10 and the third radio 30 and control of encrypted communication, and transmission and reception with the first radio 10 and the third radio 30. Control the data by A personal computer or the like is used for the communication control unit 70.

The encryption information holding unit 80 holds the encryption information acquired from the first wireless device 10. The encryption information holding unit 80 uses, for example, a storage medium such as a RAM, a ROM, or a non-volatile memory. Here, the encryption information is information such as an SSID and an encryption key to be used when performing connection and encryption communication between the second wireless device 20 and the third wireless device 30.

The monitor 90 displays video data acquired from the third radio 30. The monitor 90 is installed, for example, in a cab of the vehicle 50 or the like.

Note that Wi-Fi (registered trademark) and WiGig (registered trademark), for example, are used for wireless communication in the antenna unit 11, the antenna unit 21, and the antenna unit 41.

FIG. 3 is a block diagram showing an example of the communication system 3 on the platform side in the station-to-vehicle communication system 1 according to the embodiment.

The communication system 3 on the platform side has a first radio 10, a third radio 30, and a controller 40.

The first radio 10 and the control device 40 in the communication system 3 on the platform side are the same as the communication system 2 on the vehicle side in FIG. 2 except that wireless communication is performed to the third radio 30. .

In addition, the communication system 3 on the platform side includes the third radio 30, the communication control unit 100, the encrypted information distribution unit 110, and the camera 60 in the platform.

The third wireless device 30 has an antenna unit 31 and a wireless control unit 32.

The antenna unit 31 performs wireless communication with the first radio 10, the second radio 20, and the control device 40. Specifically, the antenna unit 31 includes an antenna, and transmits / receives data (packets) to / from the first radio 10, the second radio 20, and the control device 40 by wireless communication using the antenna. For wireless communication in the antenna unit 31, for example, Wi-Fi (registered trademark) or WiGig (registered trademark) is used.

The wireless control unit 32 controls the antenna unit 31. Specifically, the wireless control unit 32 controls radio waves in the antenna unit 31. Note that, for example, an IC chip or the like is used for the wireless control unit 32.

The communication control unit 100 controls the entire third wireless device 30. Specifically, the communication control unit 100 controls the authentication process for connecting the third wireless device 30 to the second wireless device 20, and data by transmission and reception between the second wireless device 20 and the third wireless device 30. Control and so on. A personal computer or the like is used for the communication control unit 100.

The encrypted information distribution unit 110 acquires the encrypted information received by the third wireless device 30 from the first wireless device 10, and performs communication control when the third wireless device 30 performs encrypted communication with the second wireless device 20. The encryption information is transmitted by the unit 100.

The camera 60 shoots the inside of the platform. For example, the person who gets on and off the vehicle 50 in the platform is photographed.

[2. Operation]
FIG. 4 is a schematic diagram showing an example of the operation of the station-to-vehicle communication system 1 according to the embodiment.

First, when the vehicle 50 travels in the vicinity of the first wireless device 10 and the second wireless device 20 installed in the vehicle 50 is included in the communication range A of the first wireless device 10, the first wireless device 10 A connection process is performed between the two wireless devices 20 (S101). Specifically, first, the second wireless device 20 always searches for a beacon signal including a specific SSID from the first wireless device 10, and when the beacon signal from the first wireless device 10 is received, 1. Send a connection request signal to the radio 10. When the first radio 10 receives the connection request signal from the second radio 20, the first radio 10 transmits a connection response signal to the second radio 20.

The first wireless device 10 may transmit the beacon signal when the control device 40 instructs the second wireless device 20 to transmit the beacon signal without transmitting the beacon signal all the time.

Next, the first radio 10 and the second radio 20 perform connection processing for transmitting and receiving encrypted data (S102). Specifically, first, when the first wireless device 10 transmits a connection response signal, the first wireless device 10 transitions to a key exchange state. Then, after receiving the connection response signal, the second wireless device 20 transmits and receives an encryption key for performing encrypted communication. After transitioning to the key exchange state, the first wireless device 10 transmits and receives an encryption key to and from the second wireless device 20, and ends the authentication process. In addition, WPA2 / 4 way-HandShake etc. are used for an authentication process, for example.

Then, after the authentication process is completed, the first wireless device 10 controls the encryption information for performing the encrypted communication without performing the authentication process between the second wireless device 20 and the third wireless device 30. Acquire from the device 40. After acquiring the encryption information, the first radio 10 transmits the acquired encryption information to the second radio 20 (S103).

Note that, when a plurality of third radios 30 are constructed in the platform, the control device 40 holds encryption information corresponding to each third radio 30 in a one-to-one correspondence. good. Further, in the case where a plurality of wireless networks are constructed from a plurality of third wireless devices 30, encrypted information may be held in one-to-one correspondence with each wireless network.

Further, the encryption information acquired by the second wireless device 20 is stored by being stored by the encryption information storage unit 80 of the vehicle 50.

Next, the vehicle 50 separates from the first radio 10, travels near the platform, that is, near the third radio 30, and the second radio 20 installed in the vehicle 50 is within the communication range B of the third radio 30. , The second wireless device 20 starts connection with the third wireless device 30 (S104). Specifically, first, the second radio 20 always searches for a beacon signal from the third radio 30 that matches the information distributed from the control device 40, and the beacon signal from the third radio 30 , And transmits a connection request signal to the third radio 30. When the third wireless device 30 receives the connection request signal from the second wireless device 20, the third wireless device 30 transmits a connection response signal to the second wireless device 20.

Then, the second wireless device 20 and the third wireless device 30 start encrypted communication using encrypted information without performing authentication processing, and perform connection with a camera (S105). Specifically, after the authentication process is completed between the first radio 10 and the second radio 20, the control device 40 encrypts the third radio 30 before entering the platform of the vehicle 50. The encrypted information for performing encrypted communication with the second wireless device 20 is distributed to the information distribution unit 110. Then, the third wireless device 30 starts encrypted communication without performing an authentication process with the second wireless device 20 using the distributed encryption information. In addition, the second wireless device 20 performs communication connection with the camera 60 via the third wireless device 30.

Then, when the vehicle 50 intrudes into the platform, the second wireless device 20 acquires captured data captured by the camera 60 through the third wireless device 30 by encrypted communication (S106).

In the communication range, a signal transmitted from one of the wireless devices can be received by the other wireless device. Therefore, the communication range A of the first wireless device 10 is a range in which the signal transmitted from the first wireless device 10 can be received by the third wireless device 30, and the communication range of the third wireless device 30 Inside B is a range in which the signal transmitted from the third radio 30 can be received by the first radio 10.

FIG. 5 is a flowchart showing an example of the operation of the second radio 20 of the station-to-vehicle communication system 1 according to the embodiment.

First, the second wireless device 20 periodically searches for a beacon signal including a specific SSID from the first wireless device 10.

Next, the second wireless device 20 detects the SSID from the first wireless device 10 (S201).

When the SSID from the first wireless device 10 is detected, the second wireless device 20 performs connection processing with the first wireless device 10 (S202). Here, the connection process is a process in which the second wireless device 20 transmits a connection request signal and receives a connection response signal, and performs communication connection between the first wireless device 10 and the second wireless device 20. . If the connection processing fails, the second wireless device 20 may return to the standby for receiving the SSID again.

Next, the second wireless device 20 performs an authentication process with the first wireless device 10 (S203). Here, the authentication process is a process for exchanging encryption keys such as, for example, WPA2 / 4 way-HandShake and performing encrypted communication between the first wireless device 10 and the second wireless device 20.

Then, the second wireless device 20 acquires encrypted information for connection with the third wireless device 30 from the encrypted information control unit 42 included in the control device 40 via the first wireless device 10 (S204).

Next, the encryption information holding unit 80 of the vehicle 50 holds the encryption information acquired by the second wireless device 20 from the control device 40 under the control of the communication control unit 70 (S205).

Then, when the second wireless device 20 receives from the third wireless device 30 a beacon signal including an SSID that matches the SSID obtained from the control device 40, the second wireless device 20 performs connection processing with the third wireless device 30 (S206). Here, the connection process is a process in which the second wireless device 20 transmits a connection request signal and receives a connection response signal, and performs communication connection between the second wireless device 20 and the third wireless device 30. .

Next, the second wireless device 20 encrypts with the third wireless device 30 without performing authentication processing with the third wireless device 30 using the encryption information held in the encryption information holding unit 80. It changes to the state which performs communication.

Then, the second wireless device 20 connects to the camera 60 and acquires shooting data shot by the camera 60. When there are a plurality of cameras, the communication control unit 70 of the vehicle 50 can control the second wireless device 20 by managing shooting data shot by each camera.

When the imaging data is acquired from the camera 60, the second wireless device 20 outputs the imaging data to the monitor 90 (S207) so that the monitor 90 can display the imaging data.

The second wireless device 20 performs connection while switching the connection with the third wireless device with the strongest received power in connection with the plurality of third wireless devices.

Next, the second radio device 20 checks whether the communication connection with the third radio device 30 is disconnected (S208). When the communication connection with the third wireless device 30 is not disconnected, the second wireless device 20 continues the output of the video data to the monitor 90 (return to S207). If the communication connection with the third wireless device 30 is disconnected (the presence of the third wireless device 30 is not confirmed), the second wireless device 20 again receives the SSID from the first wireless device 10 stand by.

FIG. 6 is a flowchart showing an example of the operation of the control device 40 of the station-to-vehicle communication system 1 according to the embodiment.

First, the control device 40 stands by to detect communication connection between the first radio 10 and the second radio 20.

Then, as the vehicle 50 enters the platform, the control device 40 checks whether the communication connection is established between the first radio 10 and the second radio 20 (S301). Specifically, for example, when the connection processing between the first radio 10 and the second radio 20 ends, a signal from the first radio 10 notifying the control device 40 that the connection processing has ended. The controller 40 detects that the communication connection between the first radio 10 and the second radio 20 has been made.

Next, the control device 40 collates the vehicle 50 with the third radio 30 in the platform to which the vehicle 50 enters, and transmits the encrypted information to the first radio 10 and the third radio 30. Is selected (S302). Specifically, for example, the control device 40 manages a table in which information that each of the vehicles 50 differs, such as a vehicle number or the like, and information that the third wireless device 30 in the platform differs. The vehicle 50 and the third radio 30 in the platform to which the vehicle 50 enters are collated based on the table.

Then, the control device 40 distributes encrypted information for the first wireless device 10 to distribute to the second wireless device 20 to the first wireless device 10 (S303). This is to allow the second wireless device 20 and the third wireless device 30 to omit the authentication process.

Then, the control device 40 distributes the encrypted information to the third wireless device 30 (S304).

After distributing the encryption information to the third wireless device 30, the control device 40 stands by to detect that the first wireless device 10 and the second wireless device 20 are connected for communication.

In addition, although distribution of encryption information was made into the order transmitted to the 3rd radio 30 after transmitting to the 1st radio 10, it is not limited to this, The 1st radio after transmitting to the 3rd radio 30 10 may be transmitted to the first radio 10 and the third radio 30 simultaneously.

[3. Effect etc]
The second radio 20 installed in the vehicle 50 normally holds the information for encrypted communication distributed after the authentication process is successful, before the connection process with the third radio 30 installed in the platform is performed. ing.

As a result, the communication connection between the second radio device 20 and the third radio device 30 can be encrypted communication without performing the authentication process. Then, when performing encrypted communication between the third wireless device 30 and the second wireless device 20, at least connection processing may be performed, and the end of the connection processing and the authentication processing can be prevented from being delayed. . That is, when the vehicle enters the platform, the control device 40 can control the encrypted communication between the second wireless device 20 and the third wireless device 30 at an appropriate timing, and the second wireless device 20 is the third wireless device. The encrypted data received from 30 can be received at any time as long as the third wireless device 30 is communicatively connected with the completion of the connection process. Therefore, the station-to-vehicle communication system 1 can improve the exchange of encrypted data at an appropriate timing.

Further, it is preferable that the communication range of the first wireless device 10 and the communication range of the third wireless device 30 have overlapping regions and non-overlapping regions.

Thus, the control device 40 transmits the third wireless device 30 to the third wireless device 30 based on the timing when the vehicle 50 enters the area where the communication range of the first wireless device 10 and the communication range of the third wireless device 30 overlap. Communication with the wireless device 20 can be started. That is, when the second wireless device 20 can receive both beacon signals from the first wireless device 10 and the third wireless device 30, communication with the third wireless device 30 can be started, and the station-to-vehicle communication system 1 The connection process between the two radios 20 and the third radio 30 can be facilitated.

In addition, when a plurality of vehicles 50 are linked and traveled, the second wireless device 20 may be at least installed in a vehicle positioned at the top with respect to the traveling direction of the vehicles 50.

As a result, the leading vehicle, which is the most advanced vehicle in the vehicle, can communicate with the first radio 10 or the third radio 30 first, so that encrypted data can be exchanged at more appropriate timing. Can.

Further, when a plurality of vehicles 50 are linked and traveling and the second wireless device 20 is installed in the leading vehicle, it is preferable that the vehicles be connected for communication.

Thereby, the station-to-vehicle communication system 1 can transmit the data received from the leading vehicle to the other vehicles 50 connected by communication between the vehicles 50. That is, encrypted data can be received also at the tail end vehicle 50 connected. Therefore, for example, in the case where the encrypted data is captured data captured by a surveillance camera installed on a platform, a crew member who performs monitoring with the last vehicle 50 sees the captured data with a monitor of the last vehicle 50 Can.

Further, as shown in FIG. 1, two third radios 30 may be installed at least near the entrance and exit of the vehicle 50 on the platform to form one radio network. Note that three or more third radios 30 can be installed on one platform.

Thus, in the station-to-vehicle communication system 1, the vehicle 50 can receive the encrypted data before entering the platform, and the communication connection with the third radio 30 near the platform leaving is disconnected even after leaving the platform. Up to encrypted data can be received. For example, when the encrypted data is shooting data shot by a surveillance camera, the shooting data can be viewed on the monitor even after leaving the platform.

When a plurality of vehicles 50 are linked and travel, the second wireless device 20 may be installed not only on the lead vehicle but also on the tail vehicle which is the rearmost vehicle 50. Furthermore, the second wireless device 20 is installed also on the intermediate vehicle located between the leading vehicle and the rear vehicle of the plurality of connected vehicles 50, and the plurality of second wireless devices 20 are connected to the plurality of connected vehicles 50. May be installed.

Thereby, in the station-to-vehicle communication system 1, the encrypted communication between the second radio 20 and the third radio 30 is communicated until the communication connection between the second radio 20 and the third radio 30 in the rear vehicle is disconnected. be able to. Therefore, when leaving the platform in the station-to-vehicle communication system 1, the second wireless device 20 can extend the time period in which encrypted data can be received from the third wireless device 30 rather than being installed only on the leading vehicle. .

Further, a plurality of third radios 30 may be installed in the platform as shown in FIG. 1 to form a plurality of wireless networks such as a wireless network 3010N and a wireless network 3020N. That is, in the case where there are a plurality of entry routes of vehicles to the platform, for example, in the case where the 1st line and the 2nd line exist in the platform, the 3rd radio 30 on the 1st line side The third radio 30 forms a wireless network 3020N. Then, in the vehicle 50 entering the first line, the control device 40 may control the third wireless device 30 so as to connect with the one forming the first-line-side wireless network 3010N. Similarly, in the vehicle 50 entering the second line, the control device 40 may control the third wireless device 30 so as to connect with the one forming the wireless network 3020N on the second line side. Specifically, the control device 40 transmits the encryption information only to the third wireless device 30 on the side where the vehicle 50 enters, and the third wireless device 30 on the side where the vehicle 50 enters is the second wireless device 20. Control to transmit a beacon signal.

As a result, the third wireless device 30 on the side where the vehicle 50 does not enter can be prevented from being erroneously connected to the second wireless device 20. That is, the third wireless device 30 can be made to communicate with the appropriate second wireless device 20.

Further, even if there are a plurality of entry routes in the platform on the vehicle 50 side, only the shooting data of the entry destination can be acquired without the crew in the vehicle 50 operating it.

As described above, the embodiment has been described as an example of the technology in the present disclosure. For that purpose, the attached drawings and the detailed description are provided.

Therefore, among the components described in the attached drawings and the detailed description, not only components essential for solving the problem but also components not essential for solving the problem in order to exemplify the above-mentioned technology May also be included. Therefore, the fact that those non-essential components are described in the attached drawings and the detailed description should not immediately mean that those non-essential components are essential.

Moreover, since the above-mentioned embodiment is for illustrating the technique in this indication, various change, substitution, addition, omission, etc. can be performed within the range of a claim or its equivalent.

The present disclosure is applicable to a communication system that transmits and receives data between a radio installed in a vehicle and a radio installed in a platform of a station where the vehicle stops or passes.

1 station-to-vehicle communication system 2 communication system on the vehicle side 3 communication system on the platform side 10 first radio 20

second radio

20, 3010, 3020, 3030, 3040

third radio

3010 N, 3020 N, 3030 N, 3040 N radio network 40 Control device 50

Vehicle

11, 21, 31, 41

Antenna unit

12, 22, 32 Radio control unit 42 Encryption

information control unit

60, 61, 62, 63, 64

Camera

70, 100 Communication control unit 80 Encryption information holding unit 90 Monitor 110 Encryption Information Distribution Department

Claims

The first radio,
A second wireless device that communicates with the first wireless device and is installed in a vehicle;
A third wireless device that communicates with the second wireless device and is installed at a station at which the vehicle stops;
A controller configured to control the first radio and the third radio;
The control device transmits encryption information to the first radio and the third radio.
The second wireless device receives the encrypted information from the first wireless device, and starts encrypted communication using the encrypted information without performing authentication processing with the third wireless device. ,
Station inter-vehicle communication system.
The first wireless device and the second wireless device perform connection processing for establishing communication connection between the first wireless device and the second wireless device and authentication processing for performing encrypted communication.
The station-to-vehicle communication system according to claim 1.
The communication range of the first wireless device and the communication range of the third wireless device have overlapping regions,
When the vehicle travels in an area where the communication range of the first wireless device and the communication range of the second wireless device overlap, the second wireless device communicates with the third wireless device. Start the connection process to do
The station-to-vehicle communication system according to claim 1.
The encryption information is an encryption key for performing the encryption communication between the two radios and the third radio.
The station-to-vehicle communication system according to claim 1.
A plurality of said vehicles are connected,
The second wireless device is installed in the vehicle positioned at the top with respect to the traveling direction of the vehicle.
The station-to-vehicle communication system according to claim 1.
Communicate between the plurality of vehicles,
The station-to-vehicle communication system according to claim 5.
Two of the third radios are respectively installed near the entrance and the exit of the vehicle at the station to form one communication network.
The station-to-vehicle communication system according to claim 1.
The plurality of second radios, wherein the second radio of the plurality of second radios is installed in the vehicle located at the rear end with respect to the traveling direction of the vehicle.
The station-to-vehicle communication system according to claim 5.
In a station-to-vehicle communication system comprising a first radio, a second radio installed in a vehicle, and a third radio installed in a station at which the vehicle stops, the first radio and the third radio A control method for controlling a wireless device,
Initiating a communication connection between the first radio and the second radio;
Transmitting encrypted information to the first radio and the third radio;
The first radio transmitting the received encrypted information to the second radio;
Starting the encrypted communication using the received encrypted information without performing an authentication process with the second wireless device.
Control method.