JP2022119233A - Control unit, communication function control unit, program and system - Google Patents

Abstract

To provide a new and improved control unit and a program capable of increasing communication reliability.SOLUTION: A control unit includes a communication control part for controlling communication by a first communication unit and communication by a second communication unit, wherein the communication control part causes the second communication unit to transmit a signal at a timing not overlapping with the time of signal transmission/reception by the first communication unit.SELECTED DRAWING: Figure 2

Description

The present invention relates to a control device, a communication function control device, a program and a system.

2. Description of the Related Art In recent years, techniques have been developed to authenticate devices according to the results of signal transmission/reception between devices. For example, in Japanese Unexamined Patent Application Publication No. 2002-200012, a vehicle-mounted device transmits and receives signals to and from a mobile device to authenticate the mobile device. The portable device is a remote controller for locking and unlocking the vehicle, and is also called a smart key. Also, the portable device is carried by the driver. Furthermore, Patent Literature 1 below discloses a smart key system in which, in addition to the authentication by the first communication unit, the vehicle-mounted device measures the distance to the portable device by the second communication unit, and determines whether the vehicle operation is permitted or not. ing.

JP 2019-31871 A

In the system as described above, when the first communication unit fails to transmit and receive the signal used for request-response authentication, the first communication unit again transmits the signal used for request-response authentication. However, if the timing at which the signal used for request-response authentication is retransmitted overlaps with the time at which the second communication unit transmits and receives the signal used for distance estimation, inconvenience may occur in each communication.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a new and improved control device, program and system capable of improving the reliability of communication. to provide.

In order to solve the above problems, according to an aspect of the present invention, a communication control unit that controls communication by a first communication device and communication by a second communication device is provided, wherein the communication control unit A control device is provided that causes the second communication device to transmit a signal at a timing that does not overlap with the time at which the first communication device transmits and receives a signal.

In order to solve the above problems, according to another aspect of the present invention, there is provided a communication control unit for controlling communication by the first communication device and communication by the second communication device, the control unit comprising: Enabling the communication function of the other of the first communication device and the second communication device at a timing that does not overlap with the time when one of the first communication device or the second communication device transmits and receives a signal , a communication function controller is provided.

In order to solve the above problems, according to another aspect of the present invention, there is provided a program that causes a computer to realize a communication control function of controlling communication by a first communication device and communication by a second communication device. Then, a program is provided that causes the second communication device to transmit a signal at a timing that does not overlap with the time at which the first communication device transmits and receives the signal.

In order to solve the above problems, according to another aspect of the present invention, there is provided a program that causes a computer to realize a communication control function of controlling communication by a first communication device and communication by a second communication device. the communication of the other of the first communication device or the second communication device so as not to overlap with the time during which one of the first communication device or the second communication device is transmitting and receiving a signal. A program is provided to enable the functionality.

As described above, according to the present invention, communication can be performed more efficiently.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing for demonstrating the outline of the system which concerns on this embodiment. It is an explanatory view for explaining functional composition of control device 10 concerning this embodiment. 2 is a block diagram for explaining the functional configuration of a portable device 20 carried by a user U who uses a vehicle V; FIG. FIG. 4 is a sequence diagram for explaining an example of the basic flow of ranging processing and request-response authentication; FIG. 4 is a sequence diagram for explaining a first example of communication control according to the present embodiment; FIG. 9 is a sequence diagram for explaining a second example of communication control according to the present embodiment; FIG. 4 is an explanatory diagram for explaining an example of operation processing of the control device 10 according to the present embodiment; FIG. 4 is an explanatory diagram for explaining an example of operation processing of the portable device 20 according to the present embodiment;

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present specification and drawings, constituent elements having substantially the same functional configuration are denoted by the same reference numerals, thereby omitting redundant description.

<1. embodiment>
<<1.1. System configuration example >>
First, with reference to FIG. 1, a schematic configuration of a system according to this embodiment will be described. FIG. 1 is an explanatory diagram for explaining the outline of the system according to this embodiment.

As shown in FIG. 1 , the system according to this embodiment has a vehicle V and a portable device 20 . The vehicle V also has a control device 10, a plurality of first wireless communication devices a1, and a second wireless communication device a2. The first wireless communication device a1 is an example of a first communication device according to the present invention, and the second wireless communication device a2 is an example of a second communication device according to the present invention.

A vehicle V according to the present embodiment is an example of a mobile object according to the present invention. vehicle). Also, the mobile body may be an aircraft, a ship, or the like.

As shown in FIG. 1, the system according to the present embodiment is used for distance measurement processing between a first wireless communication unit b1 provided in a portable device 20 and a first wireless communication device a1 mounted in a vehicle V. A signal w1 is transmitted. The signal w1 used for ranging processing may be, for example, a signal conforming to ultra-wideband wireless communication. Hereinafter, a signal conforming to ultra-wideband wireless communication may be referred to as a UWB signal.

Further, as shown in FIG. 1, a signal w2 used for request response authentication is transmitted and received between the second wireless communication unit b2 provided in the portable device 20 and the second wireless communication device a2 mounted in the vehicle V. be. The signal w2 used for request-response authentication may be, for example, an RF (Radio Frequency) band signal and an LF (Low Frequency) band signal.

The authentication processing according to this embodiment includes ranging processing and request-response authentication, and the details of the authentication processing will be described later.

In this specification, as shown in FIG. 1, an example in which four first wireless communication devices a1 are mounted on a vehicle V will be mainly described. However, the number of the first wireless communication devices a1 mounted on the vehicle V may be one, two, three, or five or more. Also, the number of the second wireless communication devices a2 may be singular or plural.

(control device 10)
The control device 10 controls the communication by the first wireless communication device a1 and the communication by the second wireless communication device a2, and controls a predetermined operation of the controlled device according to the communication result. Hereinafter, the functional configuration of the control device 10 according to the present embodiment will be described with reference to FIG. 2 .

FIG. 2 is an explanatory diagram for explaining the functional configuration of the control device 10 according to this embodiment. As shown in FIG. 2 , the control device 10 includes a control section 110 , a communication section 120 and a storage section 130 .

The control unit 110 controls the overall operation of the control device 10 according to this embodiment. Also, the control unit 110 includes a communication control unit 111 and an operation control unit 113 .

The communication control unit 111 controls communication by the first wireless communication device a1 and communication by the second wireless communication device a2.

For example, the communication control unit 111 causes the second wireless communication device a2 to transmit a signal at a timing that does not overlap with the signal transmission/reception time of the first wireless communication device a1.

The operation control unit 113 performs control based on the distance between the first wireless communication device a1 mounted on the vehicle V and the first wireless communication unit b1 included in the portable device 20 when the request response authentication is established. This is done for the controlled device that the vehicle V has. Details of control over the controlled device will be described later.

Under the control of the control unit 110, the communication unit 120 transmits/receives signals including various control information to/from the first wireless communication device a1, the second wireless communication device a2, or the controlled device. For example, under the control of the communication control unit 111, the communication unit 120 transmits signals including control information related to various communications to the first wireless communication device a1 or the second wireless communication device a2.

In addition, under the control of the operation control unit 113, the communication unit 120 transmits a signal including control information related to a predetermined operation to a controlled device provided in the vehicle V. FIG.

The communication unit 120 also receives a signal including information used for various controls from the first wireless communication device a1.

Note that the communication method of the communication unit 120 may be any communication method. For example, the communication method of the communication unit 120 may be wireless communication or wired communication.

The storage unit 130 associates the battery voltage information of the portable device 20 included in the signal received from the portable device 20 with the standby time from transmission of the first authentication request signal to transmission of the second authentication request signal. Remember. Details of the first authentication request signal and the second authentication request signal will be described later.

The functional configuration of the control device 10 according to the present embodiment has been described above. Next, with reference to FIG. 3, the functional configuration of the portable device 20 will be described.

(Portable device 20)
FIG. 3 is a block diagram for explaining the functional configuration of the portable device 20 carried by the user U who uses the vehicle V. As shown in FIG. The portable device 20 according to this embodiment is an example of a communication partner device according to the present invention.

A user who uses the vehicle V carries the portable device 20 according to the present embodiment. The portable device 20 according to this embodiment may be, for example, a smart phone, an electronic key, a wearable terminal, or the like.

As shown in FIG. 3, the portable device 20 according to this embodiment includes a control section 210, a battery 220, a first wireless communication section b1, and a second wireless communication section b2.

The control unit 210 is an example of a communication control unit according to the present invention, and controls overall operations of the portable device 20 according to this embodiment.

The control unit 210, for example, controls communication by the first wireless communication unit b1 and the second wireless communication unit b2.

Further, the control section 210 may cause the first wireless communication section b1 or the second wireless communication section b2 to transmit a signal including voltage information of the battery 220 included in the portable device 20 .

Battery 220 is a general-purpose secondary battery. Portable device 20 operates based on power stored in battery 220 .

The first wireless communication unit b1 transmits and receives a signal used for distance measurement processing to and from the first wireless communication device a1 mounted on the vehicle V. FIG. As mentioned above, the signal used in the ranging process may be, for example, a UWB signal.

The second wireless communication unit b2 transmits/receives a signal used for request/response authentication to/from a second wireless communication device a2 mounted on the vehicle V. FIG. As described above, the signal used for request-response authentication may be, for example, a signal in the RF band or a signal in the LF band.

Also, the portable device 20 according to the present embodiment is an example of a communication function control device according to the present invention. In this case, the control unit 210 according to the present embodiment is an example of the communication control unit according to the present invention. The other communication function of the first wireless communication unit b1 or the second wireless communication unit b2 may be enabled at a timing when it is not possible.

The functional configuration example of the system according to the present embodiment has been described above. Next, details of communication control according to the present embodiment will be described.

<2. Details>
<<2.1. Basic flow of authentication process>>
FIG. 4 is a sequence diagram for explaining an example of the basic flow of ranging processing and request/response authentication. Authentication processing includes authentication processing based on distance measurement values and authentication processing based on request-response authentication.

As shown in FIG. 4, in this sequence diagram, a signal used for distance measurement processing between the first wireless communication device a1 mounted on the vehicle V and the first wireless communication unit b1 provided in the portable device 20 is sent and received. Signals used for request response authentication are transmitted and received between the second wireless communication device a2 mounted on the vehicle V and the second wireless communication unit b2 provided in the portable device 20. FIG.

First, the second wireless communication device a2 mounted on the vehicle V transmits a first authentication request signal, and the second wireless communication unit b2 included in the portable device 20 receives the first authentication request signal. (S102).

Next, the second wireless communication unit b2 included in the portable device 20 transmits a first authentication response signal as a response to the first authentication request signal. Here, when the second wireless communication device a2 fails to normally receive the first authentication response signal (S104), the communication control unit 111 sends the second authentication request signal to the second wireless communication device a2. (S108).

Then, the second wireless communication unit b2 successfully transmits the second authentication request signal as a response to the second authentication request signal, and the second wireless communication device a2 mounted on the vehicle V transmits the second authentication request signal. succeeds in receiving the authentication response signal (S112).

Here, since the authentication processing also includes the authentication processing based on the distance measurement value, in order to complete the authentication processing in a shorter time, whether or not the second wireless communication device a2 receives the authentication response signal is determined. In some cases, it is better to transmit and receive signals used for distance measurement processing between the first wireless communication device a1 and the first wireless communication unit b1 prior to the determination of whether.

That is, as shown in FIG. 4, prior to transmission of the second authentication request signal, the first wireless communication device a1 mounted on the vehicle V transmits a distance measurement request signal, and the portable device 20 includes The first wireless communication unit b1 receives the distance measurement request signal (S106).

Then, the first wireless communication unit b1 included in the portable device 20 transmits a ranging response signal as a response to the ranging request signal (S110).

Authentication processing is executed using the various signals described with reference to FIG. More specifically, authentication processing based on request-response authentication is performed using an authentication request signal and an authentication response signal, and authentication processing based on a distance measurement value is performed using a distance measurement request signal and a distance measurement response signal. be done.

It should be noted that the case where the second wireless communication device a2 could not normally receive the first authentication response signal and the case where the second wireless communication unit b2 could not normally transmit the first authentication response signal include.

<<2.2. Organize assignments >>
As described above, the basic flow of the authentication process is to perform the authentication process based on the request/response authentication and the authentication process based on the distance measurement value.

Then, when it is determined that the second wireless communication device a2 has not received the authentication response signal, the second wireless communication device a2 requests the authentication again at the timing when the signal used for the distance measurement process is transmitted and received. Send a signal. This allows the authentication process to be performed in a shorter time.

On the other hand, when the authentication request signal is retransmitted at the same timing as the signal used for ranging processing is transmitted and received, radio wave interference may occur between the two signals, reducing the reliability of each communication. obtain.

Further, for example, when the battery voltage value of the portable device 20 is below a predetermined value, the authentication request signal is transmitted again at a timing that coincides with the time at which the signal used for the distance measurement process is transmitted and received. 20 may have a problem due to a voltage drop of the battery 220 .

Therefore, the control device 10 according to the present embodiment causes the second wireless communication device a2 to transmit a signal at a timing that does not overlap with the time at which the first wireless communication unit b1 transmits and receives a signal used for ranging processing. As a result, the reliability of communication may be improved, and the possibility of malfunction due to voltage drop of the battery 220 included in the portable device 20 may be reduced.

It should be noted that the time for transmitting and receiving the signal used for the ranging process according to the present embodiment is the time from when the first wireless communication unit b1 included in the portable device 20 receives the ranging request signal to when the ranging response signal is transmitted. A time length T2 can be mentioned.

<<2.3. Technical features >>
First, with reference to FIG. 4, distance measurement processing and request response authentication according to the present embodiment will be described.

(ranging process)
The control device 10 estimates the distance between the first wireless communication devices mounted on each of the vehicle V and the portable device 20, for example, based on communication propagation of signals used for ranging processing.

For example, the communication propagation time is the time length T1 from when the first wireless communication device a1 mounted on the vehicle V transmits the ranging request signal to when the ranging response signal is received, and It is calculated based on the length of time T2 from when the radio communication unit b1 of 1 receives the distance measurement request signal to when it transmits the distance measurement response signal.

More specifically, the control device 10 subtracts the time length T2 from the time length T1 to calculate the time required for propagation of the ranging request signal and the ranging response signal (that is, the time required for round-trip communication). can be calculated.

Then, the control device 10 divides the time required for propagation of the distance measurement request signal and the distance measurement response signal by 2 to calculate the time required for one-way communication.

Then, the control device 10 multiplies the time required for one-way communication by a known signal speed to obtain the first radio communication device a1 mounted on the vehicle V and the first radio communication device a1 provided in the portable device 20. A distance measurement value, which is the distance to the wireless communication unit b1, is calculated.

Note that the portable device 20 may execute the distance measurement process. In this case, for example, the first wireless communication device a1 or the second wireless communication device a2 mounted on the vehicle V transmits a signal including information about the time length T1.

(request-response authentication)
The authentication request signal and the authentication response signal are used for request-response authentication. In request-response authentication, an authentication request signal and an authentication response signal generated based on the authentication request are transmitted and received. By adding one step of request-response authentication, which is a method different from the authentication process based on the distance measurement value, the accuracy of authentication can be further improved.

Request-response authentication means that the authenticator generates an authentication request signal and transmits it to the authenticated party, the authenticated person generates an authentication response signal based on the authentication request signal and transmits it to the authenticator, and the authenticator performs authentication. This is a method of authenticating a person to be authenticated based on a response signal. Since the authentication request signal is typically a random number and changes with each authentication, request-response authentication is resistant to replay attacks. Also, the authentication response signal is generated based on the information of the person to be authenticated. The information of the person to be authenticated is, for example, an ID and a password. Since the ID and password themselves are not sent and received, wiretapping is reduced. In this specification, the authenticator is the control device 10 and the person to be authenticated is the portable device 20 .

More specifically, for example, in response to an authentication request signal transmitted by the second wireless communication device a2 mounted on the vehicle V, the portable device 20 responds to the authentication request signal and key information such as a password stored in advance. , to compute the authentication response signal. Then, when it is recognized that the authentication response signal transmitted from the second wireless communication unit b2 mounted on the vehicle V indicates a regular value calculated from the authentication request signal and the key information, the control The device 10 may determine that the portable device 20 has been successfully authenticated.

Then, when the authentication based on the request-response authentication is established, the operation control unit 113 controls the controlled device to perform a predetermined operation according to the authentication process based on the measured distance value. For example, if the device to be controlled is a key for a door of the vehicle V, the operation control unit 113 detects the door key when the authentication based on the request response authentication is successful and the measured distance value is equal to or less than a predetermined value. Executes control related to unlocking or locking of the key.

If the second wireless communication device a2 or the second wireless communication unit b2 fails to transmit/receive the second authentication response signal, the communication control unit 111 repeats the first The second wireless communication device may be caused to transmit an authentication request signal, or the authentication process may be interrupted.

Also, the second authentication request signal according to this embodiment may contain the same information as the information contained in the first authentication request signal, or may contain different information.

The ranging process and request response authentication according to the present embodiment have been described above. Next, a first example of communication control according to this embodiment will be described with reference to FIG.

(First embodiment)
FIG. 5 is a sequence diagram for explaining a first example of communication control according to this embodiment.

As shown in FIG. 5, when the reception of the first authentication response signal fails, the communication control unit 111 sends the second wireless The communication device a2 is caused to transmit a second authentication request signal (S108a). Here, the predetermined time rt1 is a communication waiting time controlled so that the timing of transmitting the second authentication request signal does not overlap with the time of transmitting and receiving the signal used for the distance measurement process.

The storage unit 130 holds, for example, information related to the predetermined time rt1. In this case, the communication control section 111 may control the timing of transmitting the second authentication request signal based on the time rt1 stored in the storage section 130 in advance. Then, the control unit 210 provided in the portable device 20 enables the communication function of the second wireless communication unit b2 at a timing that does not overlap with the time at which the signal used for the distance measurement process is transmitted and received based on the time rt1 held in advance. do.

Further, even if the communication control unit 111 does not store the information about the time rt1 in advance in the storage unit 130 and causes the second wireless communication device a2 to transmit the second authentication response signal after receiving the ranging response signal, good.

Then, the second wireless communication unit b2 included in the portable device 20 succeeds in transmitting the second authentication request signal as a response to the second authentication request signal, and the second wireless communication device a2 mounted on the vehicle V successfully receives the second authentication response signal (S112a).

As described above, in the first example of the communication control according to the present embodiment described with reference to FIG. Interference between two radio waves does not occur, and highly reliable communication can be realized. In addition, the possibility of malfunction due to the voltage drop of the battery 220 included in the portable device 20 can be reduced.

The first example of communication control according to the present embodiment has been described above. Next, a second example of communication control according to this embodiment will be described with reference to FIG.

(Second embodiment)
FIG. 6 is a sequence diagram for explaining a second example of communication control according to this embodiment.

As an effect of the first example of the communication control according to the present embodiment, it is possible to reduce the possibility of malfunction caused by the voltage drop of the battery 220 included in the portable device 20 .

On the other hand, if the voltage value of the battery 220 is equal to or higher than the predetermined value, the portable device 20 may be less likely to experience problems due to the voltage drop of the battery 220 . Therefore, the communication control section 111 may control the timing of transmission of the second authentication request signal based on the voltage value of the battery 220 included in the portable device 20 .

In the second example of the communication control according to the present embodiment, for example, when the voltage value of the battery 220 included in the portable device 20 is less than a predetermined value, the communication control unit 111 outputs a signal used for distance measurement processing. is transmitted/received, and the second wireless communication device a2 is caused to transmit the second authentication request signal at a timing that does not overlap.

As shown in FIG. 6, the second wireless communication unit b2 included in the portable device 20 may transmit the authentication response signal including the battery voltage information of the portable device 20, or may transmit a signal different from other authentication response signals. may include the battery voltage information of the portable device 20 in the transmission. In this case, the communication control unit 111 may cause the second wireless communication device to transmit the second authentication request signal at a timing based on the battery voltage of the portable device 20 (S108b).

For example, when the battery voltage value of the portable device 20 is less than a predetermined value, the communication control unit 111 sets the second signal at a timing that does not overlap with the time when the first wireless communication device a1 transmits and receives a signal used for ranging processing. wireless communication device to transmit the second authentication request signal.

Further, when the battery voltage value of the portable device 20 is equal to or higher than a predetermined value, the communication control unit 111 performs the second The wireless communication device may be caused to transmit a second authentication request signal.

Then, the second wireless communication unit b2 included in the portable device 20 succeeds in transmitting the second authentication request signal as a response to the second authentication request signal, and the second wireless communication device a2 mounted on the vehicle V successfully receives the second authentication response signal (S112b).

In the second embodiment of the communication control described above with reference to FIG. 6, the communication control section 111 performs communication control based on the battery voltage value of the portable device 20 . As a result, the communication control unit 111 can execute authentication processing in a short time if the battery voltage value of the portable device 20 is equal to or higher than the predetermined value, and if the battery voltage value of the portable device 20 is less than the predetermined value, It is possible to reduce the possibility of malfunction due to the voltage drop of the battery 220 .

The details of the invention according to the present embodiment have been described above. Next, a specific example of operation processing of the system according to this embodiment will be described with reference to FIGS. 7 and 8. FIG.

<3. Operation processing example>
FIG. 7 is an explanatory diagram for explaining an example of operation processing of the control device 10 according to this embodiment.

First, the communication control unit 111 causes the first wireless communication device a1 to transmit an authentication request signal (S202).

Next, the control device 10 determines whether or not the second wireless communication device a2 has received the authentication response signal within a predetermined time (S204). If the authentication response signal has been received within the predetermined time (S204/Yes), the process proceeds to S212, and if the authentication response signal has not been received within the predetermined time (S204/No), the process proceeds to S206.

If the authentication response signal has not been received within the predetermined time (S204/No), the control device 10 determines whether or not the battery voltage value of the portable device 20 is equal to or higher than a predetermined value (S206). If the battery voltage value of the portable device 20 is greater than or equal to the predetermined value (S206/Yes), the process proceeds to S210, and if the battery voltage value of the portable device 20 is less than the predetermined value (S206/No), the process is advanced to S208.

If the battery voltage value of the portable device 20 is equal to or higher than the predetermined value (S206/Yes), the communication control unit 111 sends the signal to the second wireless communication device a2 again at a timing that coincides with the time at which the signal used for the distance measurement process is transmitted and received. An authentication request signal is transmitted (S210), and the process proceeds to S204.

If the battery voltage value of the portable device 20 is less than the predetermined value (S206/No), the communication control unit 111 reconnects the signal to the second wireless communication device a2 at a timing that does not overlap with the time for transmitting and receiving the signal used for the distance measurement process. transmits an authentication request signal (S208), and the process proceeds to S204.

Then, when the second wireless communication device a2 receives the authentication response signal within the predetermined time (S204/Yes), the control device 10 determines whether or not the authentication is established based on the request response authentication (S212). . If the authentication is successful (S212/Yes), the process proceeds to S214, and if the authentication is not successful (S212/No), the control device 10 according to the present embodiment ends the process.

If the authentication is successful (S212/Yes), the control device 10 determines whether or not the distance measurement value calculated based on the signal transmitted and received by the first wireless communication device a1 satisfies a predetermined criterion (S214). . If the measured distance value satisfies the predetermined criterion (S214/Yes), the process proceeds to S216, and if the measured distance value does not satisfy the predetermined criterion (S214/No), the control device 10 according to the present embodiment terminates the process.

Then, when the measured distance value satisfies a predetermined criterion (S214/Yes), the operation control unit 113 executes control related to unlocking or locking the door (S216), and the control device according to the present embodiment 10 ends the process.

An example of operation processing of the control device 10 according to the present embodiment has been described above. Next, an example of operation processing of the portable device 20 according to this embodiment will be described with reference to FIG.

FIG. 8 is an explanatory diagram for explaining an example of operation processing of the portable device 20 according to this embodiment.

First, the second wireless communication unit b2 transmits an authentication request signal (S302).

Next, the portable device 20 determines whether or not an authentication response signal has been transmitted within a predetermined time (S304). If the authentication response signal has been transmitted within the predetermined time (S304/Yes), the process proceeds to S312, and if the authentication response signal has failed to be transmitted within the predetermined time (S304/No), the process proceeds to S306. be done.

If the transmission of the authentication response signal fails within the predetermined time (S304/No), the portable device 20 determines whether the voltage value of the battery 220 included in the portable device 20 is equal to or higher than the predetermined value (S306). If the battery voltage value is greater than or equal to the predetermined value (S306/Yes), the process proceeds to S308, and if the battery voltage value is less than the predetermined value (S306/No), the process proceeds to S310.

If the battery voltage value is equal to or higher than the predetermined value (S306/Yes), the communication function of the second wireless communication unit b2 is enabled at a timing that does not overlap with the time for transmitting/receiving signals used for distance measurement processing (S308). Then, the process proceeds to S302.

If the battery voltage value is less than the predetermined value (S306/No), the communication function of the second wireless communication unit b2 is enabled at the timing of transmitting/receiving the signal used for distance measurement processing (S310). Then, the process proceeds to S302.

Then, when the authentication response signal is transmitted within the predetermined time (S304/Yes), the control device 10 executes the processes in S212 to S216 described with reference to FIG.

<4. Supplement>
Although the preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention belongs can conceive of various modifications or modifications within the scope of the technical idea described in the claims. It is understood that these also naturally belong to the technical scope of the present invention.

Also, a series of processes by each device described in the present invention may be realized using either software, hardware, or a combination of software and hardware. Programs constituting software are stored in advance in a recording medium (non-transitory media) provided inside or outside each device, for example. Each program, for example, is read into a RAM when executed by a computer, and executed by a processor such as a CPU. The recording medium is, for example, a magnetic disk, an optical disk, a magneto-optical disk, a flash memory, or the like. Also, the above computer program may be distributed, for example, via a network without using a recording medium.

Also, the processes described using the sequence diagrams in this specification do not necessarily have to be executed in the order shown in the drawings. For example, some processing steps may be performed in parallel. Also, additional processing steps may be employed, and some processing steps may be omitted.

V: vehicle, a1: first wireless communication device, a2: second wireless communication device, 10: control device, 110: control unit, 111: communication control unit, 113: operation control unit, 120: communication unit, 130 : storage unit, 20: portable device, 210: control unit, 220: battery, b1: first wireless communication unit, b2: second wireless communication unit

Claims (14)

a communication control unit that controls communication by the first communication device and communication by the second communication device;
with
The communication control unit
causing the second communication device to transmit a signal at a timing that does not overlap with the time at which the first communication device transmits and receives a signal;
Control device. The communication control unit
cause the second communication device to transmit a first authentication request signal;
causing the second communication device to transmit a second authentication request signal as the signal when the second communication device does not receive an authentication response signal in response to the first authentication request signal from the communication partner device; A control device according to claim 1 . 3. The control according to claim 2, wherein said communication control unit controls communication between said first communication device and said communication partner device after causing said second communication device to transmit a first authentication request signal. Device. 4. The communication control unit controls transmission and reception of a signal used for estimating a positional relationship between the first communication device and the communication partner device as communication between the first communication device and the communication partner device. The control device according to . The first communication device and the second communication device are mounted on a mobile body,
Control device according to any one of claims 2 to 4. The communication partner device is carried by a user who uses the mobile body.
A control device according to claim 5 . The control device is
a storage unit that associates and stores the battery voltage of the communication partner device with a standby time from transmission of the first authentication request signal to transmission of the second authentication request signal;
further comprising
The communication control unit
causing the second communication device to transmit the second authentication request signal at a timing based on the battery voltage of the communication partner device;
7. A control device according to claim 6. The communication control unit
When the battery voltage of the communication partner device is less than a predetermined value, the second authentication request signal is transmitted to the second communication device at a timing that does not overlap with the time when the first communication device transmits and receives signals. let
A control device according to claim 7 . The communication control unit
at least one of the first communication device and the second communication device performs the second authentication on the second communication device at a timing based on the battery voltage of the communication partner device received from the communication partner device to send a request signal,
The control device according to claim 7 or 8. The control device is
control based on the positional relationship between the first communication device and the communication partner device when the first authentication request signal or the second authentication request signal and the authentication response signal received from the communication partner device are established; an operation control unit for a controlled device included in the moving object;
10. A control device according to any one of claims 5 to 9, further comprising: a communication control unit that controls communication by the first communication device and communication by the second communication device;
with
The communication control unit
Enabling the communication function of the other of the first communication device or the second communication device at a timing that does not overlap with the time when one of the first communication device or the second communication device transmits and receives a signal ,
Communication function controller. to the computer,
A program for realizing a communication control function for controlling communication by a first communication device and communication by a second communication device,
causing the second communication device to transmit a signal at a timing that does not overlap with the time at which the first communication device transmits and receives a signal;
program. to the computer,
A program for realizing a communication control function for controlling communication by a first communication device and communication by a second communication device,
The communication function of the other of the first communication device and the second communication device is set so as not to overlap with the time during which one of the first communication device or the second communication device is transmitting and receiving signals. To enable,
program. a control device according to any one of claims 1 to 10;
a communication function control device according to claim 11;
A system comprising:

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