WO2019172352A1

WO2019172352A1 - Vehicle-mounted device and control method therefor

Info

Publication number: WO2019172352A1
Application number: PCT/JP2019/008993
Authority: WO
Inventors: 憲行増田
Original assignee: 京セラ株式会社
Priority date: 2018-03-08
Filing date: 2019-03-07
Publication date: 2019-09-12

Abstract

A vehicle-mounted device 10 mounted to a vehicle 20 comprises: a near-field communications unit 11 that performs inter-vehicle communications with a vehicle-mounted device 10 mounted on another vehicle 20; a wide-area wireless communications unit 12 that performs wide area communications with a base station 4; and a control unit 13 that notifies the vehicle-mounted device 10 mounted in another vehicle 20 about the communications state of the wide area wireless communications, via inter-vehicle communications.

Description

In-vehicle communication device and control method thereof

This disclosure relates to vehicle-to-vehicle communication technology.

In recent years, vehicle-to-vehicle communication technology has become widespread, and together with each terminal device, using wireless communication between terminal devices in accordance with a representative wireless communication standard (for example, a wireless LAN standard such as IEEE802.11p). A technique for detecting a collision between moving mobile bodies (automobiles, motorcycles, bicycles, pedestrians, etc.) is known (for example, see Patent Document 1).

In this technology, a terminal device (hereinafter referred to as “own terminal device”) broadcasts information (hereinafter referred to as “own terminal information”) indicating the position, speed, etc. of the terminal device (hereinafter referred to as “position etc.”). In addition, by receiving information (hereinafter referred to as “other terminal information”) indicating the position of the other terminal apparatus broadcast from the other terminal apparatus, the position of the other terminal apparatus is recognized. The own terminal device tries to avoid a risk that the moving body moving with the own terminal device collides with the moving body moving with the other terminal device based on the position of the own terminal device and the position of the other terminal device.

In addition, the in-vehicle communication device has a configuration that performs wide-area wireless communication (also referred to as cellular V2X) via a base station or a roadside device (hereinafter simply referred to as a base station) to transmit and receive various types of information separately from inter-vehicle communication. (For example, refer to Patent Document 2).

JP 2017-146790 A JP 2013-118522 A

An in-vehicle communication device according to the present disclosure is an in-vehicle communication device mounted on a vehicle, and performs inter-vehicle communication with an in-vehicle communication device mounted on another vehicle, and wide-area wireless communication with a base station. It has a configuration comprising a wide-area wireless communication section and a control section that notifies the in-vehicle communication apparatus mounted on the other vehicle of the communication status of the wide-area wireless communication via the inter-vehicle communication.

It is a block diagram of the radio | wireless communications system which concerns on this Embodiment. It is a block diagram of the vehicle-mounted communication apparatus which concerns on a present Example. It is a sequence diagram showing operation | movement of the radio | wireless communications system which concerns on this Embodiment. It is a flowchart showing operation | movement of the vehicle-mounted communication apparatus which concerns on this Embodiment. It is a figure of the radio | wireless communications system which combined the vehicle-mounted communication apparatus which concerns on this Embodiment. It is a figure when a failure generate | occur | produces in the cluster which comprises the vehicle-mounted communication apparatus which concerns on this Embodiment. It is a figure when all the clusters which comprise the vehicle-mounted communication apparatus which concerns on this Embodiment fall out of a communication range. It is a figure when the leader of the cluster which comprises the vehicle-mounted communication apparatus which concerns on this Embodiment falls into a communication range.

Form for carrying out the disclosure

The present disclosure provides an in-vehicle communication device and a control method thereof that can enhance the convenience of service by inter-vehicle communication according to the communication status of wide area wireless communication.

Hereinafter, the present embodiment will be described with reference to the drawings.

FIG. 1 is a configuration diagram of a radio communication system according to the present embodiment. The wireless communication system shown in FIG. 1 includes a vehicle 20A equipped with an in-vehicle communication device 10A, a vehicle 20B equipped with an on-board communication device 10B, a base station 4, and a network 8. The base station 4 and the network 8 are provided by a communication carrier, for example. The network 8 may be called a cloud. The base station 4 performs wide-area wireless communication with a base station, a roadside device, an access point, or the like.

The vehicle 20A and the vehicle 20B can communicate with each other via the in-

vehicle communication devices

10A and 10B. The vehicle 20A and the vehicle 20B can communicate with a server or the like connected to the network 8 by performing wide area wireless communication (for example, cellular V2X) via the base station 4.

The base station 4 is a second generation mobile communication system such as GSM (registered trademark) (Global System for mobile communications), a third generation mobile communication system such as CDMA (Code Division Mutual access), or LTE (Long Term Evolution). Any mobile communication system such as a fourth generation mobile communication system or a fifth generation mobile communication system (5G) may be supported.

As the inter-vehicle communication, DSRC (DedicatedDeRange Communications) based on the IEEE 802.11p communication standard may be used, or LTE Direct in 3GPP (3rd Generation Partnership Project), V2V of cellular V2X, etc. Alternatively, the T109 communication standard of the Radio Industries Association (ARIB) may be used. There are no particular communication standards for inter-vehicle communication.

When the

vehicles

20A and 20B are described without distinction, the vehicle 20 is simply described, and when the vehicle-mounted

communication devices

10A and 10B are described without distinction, the vehicle-mounted communication device 10 is simply described. In the present embodiment, the vehicle 20 is described as a moving body. Of course, the moving body may be any moving object such as a ship, a train, or a mobile terminal such as a mobile phone or a smartphone.

FIG. 2 is a block diagram of the in-vehicle communication device according to the present embodiment. The in-vehicle communication device illustrated in FIG. 2 includes a short-range communication unit 11, a wide-area wireless communication unit 12, a control unit 13, a storage unit 14, an IF 15, a card drive unit 16, and an eSIM 19. Since the in-vehicle communication device 10 may not have a casing, the respective members may be arranged in a scattered manner in the vehicle.

The near field communication unit 11 performs wireless communication with the inter-vehicle communication unit of other vehicles or other communication devices, and transmits and receives data. As described above, communication using a communication standard such as DSRC or LTE Direct is performed.

The wide area wireless communication unit 12 performs wireless communication with the base station and transmits and receives data. As described above, wide area wireless communication using a communication standard such as GSM (registered trademark), LTE, or fifth generation mobile communication system is performed.

Each of the near field communication unit 11 and the wide area wireless communication unit 12 may include an analog signal processing unit, a digital signal processing unit, and the like. The analog signal processing unit performs amplification and analog-digital conversion processing of the received radio signal. The analog signal processing unit performs digital-analog conversion processing of the digital signal transferred from the digital signal processing unit, and performs analog amplification to transmit.

Each of the near field communication unit 11 and the wide area wireless communication unit 12 may be mounted on the in-vehicle communication device 10 as shown in FIG. Each of the short-range communication unit 11 and the wide-area wireless communication unit 12 may be connected to the in-vehicle communication device 10 without being mounted in the in-vehicle communication device 10. The short-range communication unit 11 and the wide area wireless communication unit 12 may be mounted on one device.

The digital signal processing unit encodes the data transferred from the control unit, etc., converts it into a digital signal so that it can be transmitted over the communication channel of the radio signal, and decodes and decodes the digital signal transferred from the analog signal processing unit Transfer data to the control unit.

The control unit 13 is mainly a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a backup RAM, an I / O (Input / Output), and the like that execute various programs. Configured as The control unit 13 executes various processes by executing various control programs stored in the ROM. The control unit 13 may execute processing necessary for controlling the short-range communication unit 11 and the wide-area wireless communication unit 12.

The control unit 13 executes, for example, an OS (Operating System), software for processing applications, and the like. The OS is software in which basic functions of a computer are mounted, and functions for basic management and control of electronic components mounted in the in-vehicle communication device 10 and a lot of software are commonly used. Software that manages the entire system.

The storage unit 14 includes an EEPROM (Electronically-Erasable-and Programmable-Read-Only-Memory) that can be electrically rewritten. The storage unit 14 may store programs and information necessary for controlling the short-range communication unit 11 and the wide-area wireless communication unit 12.

The IF 15 is a USB IF or other IF, and is connected to a display, a microphone and a speaker, a navigation system, or the like.

When the card drive unit 16 receives the reading or writing of the setting information from the control unit 13, the card driving unit 16 reads the profile recorded in the eSIM 19 and writes it to the eSIM 19. The card driving unit 16 may be incorporated in the eSIM 19. The card drive unit 16 may not be present and may be replaced with the control unit 13 or the like.

ESIM 19 is an embedded eSIM (Embedded SIM). The eSIM 19 may be installed anywhere in the vehicle 20 on which the in-vehicle communication device 10 is mounted. As the eSIM 19, an IC card called an attachable / detachable SIM card (or UIM card), that is, an information card may be used. The type of SIM card does not matter. In general, the SIM card records information for identifying a subscriber, carrier identification information for identifying a communication carrier, information on available services with which the subscriber is contracted, and the like. The same applies to the eSIM 19.

Hereinafter, the operation of the wireless communication system according to the present embodiment will be described.

FIG. 3 is a sequence diagram showing the operation of the wireless communication system according to the present embodiment.

The in-vehicle communication device 10 </ b> A and the in-vehicle communication device 10 </ b> B perform vehicle-to-vehicle communication at the short-range communication unit 11. The in-vehicle communication device 10A and the in-vehicle communication device 10B may have a predetermined relationship. The predetermined relationship may be, for example, a communication pair or a cluster between the in-vehicle communication devices 10. A cluster is a group consisting of in-vehicle communication devices 10 of adjacent vehicles.

Here, the wide area wireless communication of the in-vehicle communication device 10A is out of the communication range (step S1). The control unit 13 of the in-vehicle communication device 10A broadcasts a communication status notification indicating out of communication range to the short-range communication unit 11 of the in-vehicle communication device 10A. This broadcast may be performed at the timing when the communication area is out of service, or may be performed at a periodic timing. The in-vehicle communication device 10B receives a communication status notification indicating that the communication area is out of range (step S2). Details of the processing in step S2 will be described later.

Outside the communication range is a state in which communication with the base station 4 is disabled, or a reception intensity of communication with the base station 4 is less than a predetermined value.

The wide area wireless communication of the in-vehicle communication device 10A is within the communication range (step S3). The control unit 13 of the in-vehicle communication device 10A broadcasts a communication status notification indicating the communication range to the short-range communication unit 11 of the in-vehicle communication device 10A. This broadcast may be performed at a timing when the communication range is reached, or may be performed at a periodic timing. The in-vehicle communication device 10B receives a communication status notification indicating the communication range (step S4). Details of the processing in step S4 will be described later.

The periodic timing is a predetermined time interval, and the current communication status of the in-vehicle communication device 10 is notified at a predetermined time interval.

Hereinafter, the operation of the in-vehicle communication device according to the present embodiment will be described.

FIG. 4 is a flowchart showing the operation of the in-vehicle communication device according to the present embodiment.

The in-vehicle communication device 10 confirms the communication status of its own in-vehicle communication device 10 (step S11) when the communication status notification indicates out of communication range (YES in step S10: corresponding to step S2).

When the communication status of the wide-area wireless communication of the in-vehicle communication device 10 is out of the communication range (YES in step S11), the control unit 13 performs a predetermined process (step S21).

In step S21, the control unit 13 transfers the communication status notification of the in-vehicle communication device 10 of the vehicle 20 that has transmitted the communication status notification to the in-vehicle communication device 10 of one or more other vehicles 20 in other neighborhoods. May be. For example, in step S21, the in-vehicle communication device 10B transfers (or broadcasts) the communication status notification transmitted from the in-vehicle communication device 10A received in step S2 to the in-vehicle communication device 10 of another vehicle 20 in the vicinity.

Moreover, in step S21, the control part 13 transmits the communication status notification which shows that it is out of a communication range, when the information by wide area wireless communication is received from the vehicle-mounted communication apparatus 10 of the one or some other vehicle 20 in the vicinity. The information by the wide area wireless communication may be transferred to the in-vehicle communication device 10 of the vehicle 20 that has been performed. For example, in step S21, the in-vehicle communication device 10B may transfer information by the wide area wireless communication received from the in-vehicle communication device 10 of the other vehicle 20 in the vicinity to the in-vehicle communication device 10A. Here, an example of “information by wide area wireless communication” is information received from the network 8 via the base station 4 by the wide area wireless communication unit 12 of the in-vehicle communication device 10.

When the communication status of the wide area wireless communication of the in-vehicle communication device 10 is within the communication range (NO in step S11), the control unit 13 performs support processing (step S22).

In step S22, the control unit 13 sets a wireless link for vehicle-to-vehicle communication for information to support the in-vehicle communication device 10 of the vehicle 20 that has transmitted the communication status notification indicating that the communication area is out of range. Information by communication may be transferred via this wireless link. For example, the in-vehicle communication device 10B may transfer the information received by the wide-area wireless communication to the in-vehicle communication device 10A via a wireless link.

In step S22, the control unit 13 transfers the communication status notification of the in-vehicle communication device 10 of the vehicle 20 that has transmitted the communication status notification to the in-vehicle communication device 10 of one or more other vehicles 20 in the vicinity. May be. For example, in step S22, the in-vehicle communication device 10B transfers (or broadcasts) the communication status notification transmitted from the in-vehicle communication device 10A received in step S2 to the in-vehicle communication device 10 of another vehicle 20 in the vicinity.

When the communication status notification indicates the communication range (NO in step S10: corresponding to step S4), the in-vehicle communication device 10 confirms the communication status of its own in-vehicle communication device 10 (step S12).

If the communication status of the in-vehicle communication device 10 of the in-vehicle communication device 10 is out of the communication range (YES in step S12), the control unit 13 waits for support (step S23).

In step S23, the control unit 13 waits for the support of the in-vehicle communication device 10 of the vehicle 20 that has transmitted the communication status notification indicating the communication range, and a wireless link for inter-vehicle communication for information with the in-vehicle communication device 10 in the communication range is established. When set, information by wide area wireless communication transferred from the in-vehicle communication device 10 in the communication area may be received. For example, in step S23, the in-vehicle communication device 10B may receive information by wide area wireless communication transferred from the in-vehicle communication device 10A in the communication area.

In step S23, the control unit 13 transfers the communication status notification of the in-vehicle communication device 10 of the vehicle 20 that has transmitted the communication status notification to the in-vehicle communication device 10 of one or more other vehicles 20 in the vicinity. May be. For example, in step S23, the in-vehicle communication device 10B transfers (or broadcasts) the communication status notification transmitted from the in-vehicle communication device 10A received in step S4 to the in-vehicle communication device 10 of another vehicle 20 in the vicinity.

If the communication status of the wide area wireless communication of the in-vehicle communication device 10 is within the communication range (NO in step S12), the control unit 13 performs a predetermined process (step S24).

In step S24, the control unit 13 transfers the communication status notification of the in-vehicle communication device 10 of the vehicle 20 that has transmitted the communication status notification to the in-vehicle communication device 10 of one or more other vehicles 20 in the vicinity. Good. For example, in step S24, the in-vehicle communication device 10B transfers (or broadcasts) the communication status notification transmitted from the in-vehicle communication device 10A received in step S4 to the in-vehicle communication device 10 of another vehicle 20 in the vicinity.

In step S24, the control unit 13 may stop wide area wireless communication of its own in-vehicle communication device 10 because the communication status notification indicates the communication range. By doing so, the load on the base station 4 can be reduced.

Conventionally, an in-vehicle communication device can communicate wirelessly with a base station as long as it is within a communication area of wide area wireless communication, but cannot move over a wide area wireless communication if the vehicle moves out of the communication area. There is a risk. Therefore, in the wireless communication system according to the present embodiment, when the in-vehicle communication device is out of the communication range, the in-vehicle communication device that has received the notification is notified to that effect to the in-vehicle communication device of the vehicle in the vicinity. It is possible to support a vehicle of an in-vehicle communication device that is out of communication range. For this reason, the convenience of the service by vehicle-to-vehicle communication can be improved.

Furthermore, in the wireless communication system according to the present embodiment, when the in-vehicle communication device goes out of the communication range, the vehicle of the in-vehicle communication device that is out of the communication range is notified to the vehicle communication device of the vehicle in the vicinity. In addition, it is possible to provide information by wide-area wireless communication of itself or another in-vehicle communication device.

Further, in the wireless communication system according to the present embodiment, when the in-vehicle communication device is in the communication range, the vehicle communication device of the in-vehicle communication device that is in the communication range is notified to the vehicle-mounted communication device of the vehicle in the vicinity. In addition, if the user is out of the communication range, information can be provided by wide area wireless communication.

Hereinafter, an application example in which the in-vehicle communication device according to the present embodiment is combined will be described.

FIG. 5 is a diagram of a wireless communication system that combines the in-vehicle communication device according to the present embodiment.

The wireless communication system shown in FIG. 5 is a combination of a vehicle 20 on which the in-vehicle communication device 10 is mounted, and includes vehicles 20A to 20F, a base station 4, and a network 8. The same components as those in the present embodiment described above are denoted by the same reference numerals.

Vehicles 20A to 20F constitute a cluster. The cluster is a group in which vehicle-mounted communication devices 10 of adjacent vehicles perform vehicle-to-vehicle communication. Vehicle 20A and vehicle 20B, vehicle 20A and vehicle 20C, vehicle 20A and vehicle 20D, vehicle 20D and vehicle 20E, and vehicle 20D and vehicle 20F are connected by a radio link for inter-vehicle communication.

The in-vehicle communication device 10 of the vehicle 20A performs wide area wireless communication with the base station 4. The vehicle 20A performing wide area wireless communication serves as a cluster leader. In the cluster, a reader may be arranged at the center of the cluster, and only the reader may perform wide area wireless communication with the base station 4. By doing so, the load on the base station 4 can be reduced. In the cluster, any one of the vehicles 20 may be set as a sub leader in addition to the leader.

Hereinafter, an example in which a failure has occurred in a cluster constituting the in-vehicle communication device according to the present embodiment will be described.

FIG. 6 is a diagram when a failure occurs in the cluster configuring the in-vehicle communication device according to the present embodiment.

If a failure occurs in the wide area wireless communication of the reader, the sub-reader may perform wide area wireless communication instead.

The leader vehicle 20A periodically broadcasts its own communication status, and other vehicles 20 broadcast the leader's communication status and are notified to all the vehicles 20 in the cluster. When the communication status of the reader becomes out of the communication range, the sub-leader vehicle 20 may perform wide area wireless communication instead.

The leader assigns sub leaders to the most advanced and rearmost vehicles 20 in the cluster. The following method may be used as the sub-leader allocation method. The leader assigns a sub leader to the vehicle 20 that is determined to be at the forefront / end of the cluster by acquiring position information by the GNSS. Alternatively, the leader assigns a subleader to the network with the longest hop number among the networks configured in the cluster. Alternatively, the leader determines that the slowest responding vehicle 20 is the farthest vehicle 20 in the network configured in the cluster, and assigns a subleader to the vehicle 20.

FIG. 7 is a diagram when all the clusters configured by the vehicles equipped with the in-vehicle communication device according to the present embodiment fall outside the communication range. An example where all clusters are out of range is when the cluster stays outside the range for a long time, such as in a long tunnel.

In areas where it is clear that communication with the network is impossible, a cluster expansion mode can be provided to expand the control number of clusters (when the cluster expansion mode is entered, all vehicles in the tunnel are set to 1). Treated as a cluster (for example, cluster A) and the vehicle 20H that can be connected to a cluster outside the tunnel as a leader of the one cluster (cluster A) The cluster adjacent to the tunnel broadcasts the validity / invalidity of this mode. Forcing the vehicle to enter the cluster expansion mode When the cluster expansion mode is entered, the number of vehicles handled by one cluster increases, so there is no complicated control and the vehicle can be operated only at regular times and at low speeds. is assumed.

FIG. 8 is a diagram when the leader of the cluster constituting the in-vehicle communication device according to the present embodiment falls outside the communication range.

The leader vehicle 20 that has fallen out of the communication range determines whether there is a vehicle 20 within the communication range that can be delegated to the leader (step S31).

When there is a vehicle 20 in the communication area where the leader can be delegated (YES in step S31), the leader vehicle 20 delegates the leader to the vehicle 20 in the communication area (step S32). When there is no vehicle 20 in the communication area where the leader can be delegated (NO in step S31), the cluster expansion mode is negotiated with the adjacent cluster in order to shift to the cluster expansion mode (step S33).

When the adjacent cluster is in the communication range (YES in step S34), the cluster is expanded centering on the leader that is in the communication range of the adjacent cluster (step S35). When the adjacent cluster is not within the range (NO in step S34), the extension is negotiated with another adjacent cluster (step S36). Thereafter, the process proceeds to step S34.

As described above, the embodiments have been described in detail with reference to the drawings. However, the specific configuration is not limited to that described above, and various design changes and the like can be made without departing from the scope of the invention.

Note that this application claims the priority of Japanese Patent Application No. 2018-042211 (filed on Mar. 8, 2018), the entire contents of which are incorporated herein.

Claims

An in-vehicle communication device mounted on a vehicle,
A vehicle-to-vehicle communication unit that performs vehicle-to-vehicle communication with an in-vehicle communication device mounted on another vehicle;
A wide area wireless communication unit for performing wide area wireless communication with a base station;
A vehicle-mounted communication device comprising: a control unit that notifies the vehicle-mounted communication device mounted on the other vehicle via the vehicle-to-vehicle communication.
The in-vehicle communication device according to claim 1,
When performing inter-vehicle communication with an in-vehicle communication device mounted on the other first vehicle,
When the communication status of the in-vehicle communication device mounted on the other first vehicle is notified, the control unit determines whether the communication status is out of a communication range.
The in-vehicle communication device according to claim 2,
When performing vehicle-to-vehicle communication with an in-vehicle communication device mounted on the first vehicle, and
When performing inter-vehicle communication with an in-vehicle communication device installed in another second vehicle,
When the communication status notified from the in-vehicle communication device mounted on the first vehicle is out of the communication range, the control unit is configured to output the second vehicle when the communication status of its own wide area wireless communication is out of the communication range. An in-vehicle communication apparatus that processes information transmitted by wide-area wireless communication received from an in-vehicle communication apparatus mounted on the vehicle to the in-vehicle communication apparatus mounted in the first vehicle.
The in-vehicle communication device according to claim 2,
When performing vehicle-to-vehicle communication with the in-vehicle communication device mounted on the first vehicle,
When the communication status notified from the in-vehicle communication device mounted on the first vehicle is out of the communication range, the control unit is configured to transmit the wide area wireless communication unit when the communication status of its own wide area wireless communication is within the communication range. A vehicle-mounted communication device that processes information transmitted from the wide area wireless communication received from the vehicle to a vehicle-mounted communication device mounted on the first vehicle.
The in-vehicle communication device according to claim 2,
When performing vehicle-to-vehicle communication with the in-vehicle communication device mounted on the first vehicle,
When the communication status notified from the in-vehicle communication device mounted on the first vehicle is within the communication range, the control unit is configured to display the first vehicle when the communication status of its own wide area wireless communication is out of the communication range. A vehicle-mounted communication device that performs processing to receive information by wide-area wireless communication of the vehicle-mounted communication device mounted on the vehicle.
The in-vehicle communication device according to claim 2,
When performing vehicle-to-vehicle communication with the in-vehicle communication device mounted on the first vehicle,
When the communication status notified from the in-vehicle communication device mounted on the first vehicle is within the communication range, the control unit is configured to detect the wide area wireless communication when the communication status of the wide area wireless communication is within the communication range. An in-vehicle communication device that performs processing to stop wide-area wireless communication of a communication unit.
Mounted on the vehicle,
A vehicle-to-vehicle communication unit that performs vehicle-to-vehicle communication with an in-vehicle communication device mounted on another vehicle;
A wide area wireless communication unit for performing wide area wireless communication with a base station;
A method for controlling an in-vehicle communication device comprising:
A method for controlling an in-vehicle communication device, comprising: notifying a communication status of the wide area wireless communication to an in-vehicle communication device mounted on the other vehicle via the inter-vehicle communication.