WO2021162014A1 - Wireless communication system and vehicle mounted device - Google Patents

Abstract

A wireless communication system comprising a mobile terminal and a vehicle mounted device that is mounted in a vehicle and capable of wirelessly communicating with the mobile terminal, said mobile device establishing a wireless communication connection with the vehicle mounted device if the mobile terminal receives a first advertisement signal transmitted from the vehicle mounted device, wherein: the mobile terminal comprises an advertisement signal transmission unit that transmits a second advertisement signal; and the vehicle mounted device comprises a first transmission frequency control unit that increases the transmission frequency of the first advertisement signal if a second advertisement signal transmitted from the mobile terminal is received.

Description

Wireless communication system and in-vehicle device

The present invention relates to a wireless communication system and an in-vehicle device.

In Patent Document 1 below, for the purpose of suppressing the consumption of the battery included in the electric lock control device, when the remaining amount of the battery provided in the electric lock control device falls below the determination value, the electric lock control device is changed to the key device. A technique for reducing the transmission frequency of a transmitted advertisement signal is disclosed.

Japanese Unexamined Patent Publication No. 2019-031834

However, in the technique of Patent Document 1, when the remaining battery level of the electric lock control device falls below the determination value, the frequency of transmitting the advertisement signal decreases against the will of the user, and the electric lock control device is unlocked. The response is reduced. Therefore, the technique of Patent Document 1 cannot change the transmission frequency of the advertisement signal at an appropriate timing.

The wireless communication system of one embodiment includes a mobile terminal and an in-vehicle device mounted on a vehicle and capable of wirelessly communicating with the mobile terminal, and the mobile terminal transmits a first advertisement signal transmitted from the in-vehicle device. A wireless communication system in which a mobile terminal establishes a wireless communication connection with an in-vehicle device upon reception. The mobile terminal includes an advertisement signal transmission unit that transmits a second advertisement signal, and the in-vehicle device transmits from the mobile terminal. When the second advertisement signal is received, the first transmission frequency control unit for increasing the transmission frequency of the first advertisement signal is provided.

According to one embodiment, the transmission frequency of the advertisement signal transmitted from the in-vehicle device to the mobile terminal can be changed at an appropriate timing.

The figure which shows the 1st example of the process by the wireless communication system which concerns on one Embodiment. The figure which shows the 1st example of the process by the wireless communication system which concerns on one Embodiment. The figure which shows the 1st example of the process by the wireless communication system which concerns on one Embodiment. The figure which shows the 2nd example of the processing by the wireless communication system which concerns on one Embodiment. The figure which shows the 2nd example of the processing by the wireless communication system which concerns on one Embodiment. The figure which shows the 2nd example of the processing by the wireless communication system which concerns on one Embodiment. The figure which shows the 2nd example of the processing by the wireless communication system which concerns on one Embodiment. The figure which shows the hardware configuration of the in-vehicle device and FOB which concerns on one Embodiment. The figure which shows the functional structure of the in-vehicle device and FOB which concerns on one Embodiment. Flow chart showing the procedure of processing by the in-vehicle device according to one embodiment Flow chart showing the procedure of processing by FOB according to one embodiment The figure which shows the 1st example of the communication sequence by the wireless communication system which concerns on one Embodiment. The figure which shows the 2nd example of the communication sequence by the wireless communication system which concerns on one Embodiment. A flowchart showing a first modification of the procedure of processing by the in-vehicle device according to the embodiment. A flowchart showing a second modification of the processing procedure by the in-vehicle device according to the embodiment. The figure which shows the 3rd example of the processing by the wireless communication system which concerns on one Embodiment. The figure which shows the 3rd example of the processing by the wireless communication system which concerns on one Embodiment. The figure which shows the 3rd example of the processing by the wireless communication system which concerns on one Embodiment. The figure which shows the 3rd example of the processing by the wireless communication system which concerns on one Embodiment. Flow chart showing the procedure of processing by the in-vehicle device according to one embodiment Flow chart showing the procedure of processing by FOB according to one embodiment The figure which shows the 3rd example of the communication sequence by the wireless communication system which concerns on one Embodiment.

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

(Example of processing by wireless communication system 10)
FIG. 1 is a diagram showing a first example of processing by the wireless communication system 10 according to the embodiment. The wireless communication system 10 shown in FIG. 1 includes an in-vehicle device 14 and a FOB 16.

The in-vehicle device 14 is mounted on the vehicle 12. The in-vehicle device 14 controls the unlocking of the vehicle 12. In the present embodiment, it is assumed that the vehicle 12 is a motorcycle, but the present invention is not limited to this. For example, the vehicle 12 may be a four-wheeled vehicle or the like. FOB16 is an example of a "portable terminal". The FOB 16 is possessed by the user of the vehicle 12 for unlocking the vehicle 12. The FOB 16 can perform wireless communication with the in-vehicle device 14 by Bluetooth (registered trademark) using a frequency band of 2.4 GHz. The user can also release the vehicle 12 by using a terminal device other than the FOB 16 (for example, a smartphone, a tablet terminal, etc.) having the same function as the FOB 16.

As shown in FIG. 1A, the in-vehicle device 14 transmits the first advertisement signal toward the periphery of the vehicle 12 at a predetermined transmission frequency (for example, 5 times / second) in the standby state. In addition, the in-vehicle device 14 performs scanning processing for receiving the second advertisement signal transmitted from the FOB 16 at a predetermined processing frequency (for example, 30%). In the present embodiment, the processing frequency of the scanning process is represented by the ratio of the execution time of the scanning process in a predetermined unit time (unit = [%]).

Further, as shown in FIG. 1A, the FOB 16 transmits a second advertisement signal toward the periphery of the FOB 16 at a predetermined transmission frequency (for example, 10 times / second). Further, the FOB 16 performs a scanning process for receiving the first advertisement signal transmitted from the in-vehicle device 14 at a predetermined processing frequency (for example, 10%).

Then, as shown in FIG. 1B, the FOB 16 enters the communication area and the in-vehicle device 14 receives the second advertisement signal transmitted from the FOB 16, or the in-vehicle device 14 performs a predetermined operation on the vehicle 12. Upon detection, the vehicle-mounted device 14 increases the frequency of transmission of the first advertisement signal.

Further, as shown in FIG. 1C, when the FOB 16 receives the first advertisement signal transmitted from the vehicle-mounted device 14, it establishes a Bluetooth wireless communication connection with the vehicle-mounted device 14. When the Bluetooth wireless communication connection with the FOB 16 is established, the in-vehicle device 14 unlocks the vehicle 12 and enables the user to use the vehicle 12.

As shown in FIG. 1, according to the wireless communication system 10 of the present embodiment, the processing of the scanning process of the FOB 16 from the standby shown in FIG. 1A to the establishment of the Bluetooth wireless communication connection as shown in FIG. 1C. Since the frequency can be maintained low and low, the power consumption of the FOB 16 can be suppressed and the life of the battery built in the FOB 16 can be extended.

Further, as shown in FIG. 1, according to the wireless communication system 10 of the present embodiment, the transmission frequency of the first advertisement signal of the in-vehicle device 14 can be reduced during the standby shown in FIG. 1A. The power consumption of the device 14 can be suppressed, and the life of the battery used by the in-vehicle device 14 (for example, the battery mounted on the vehicle 12) can be extended.

Then, as shown in FIG. 1, according to the wireless communication system 10 of the present embodiment, the FOB 16 is maintained in a low frequency of scanning processing, while the user approaches the vehicle 12 or the user When the predetermined operation of the vehicle 12 is performed, the transmission frequency of the first advertisement signal of the in-vehicle device 14 can be increased, so that the response of the Bluetooth wireless communication connection can be enhanced.

(Another example of processing of wireless communication system 10)
FIG. 2 is a diagram showing a second example of processing by the wireless communication system 10 according to the embodiment.

As shown in FIG. 2A, the in-vehicle device 14 transmits the first advertisement signal toward the periphery of the vehicle 12 at a predetermined transmission frequency (for example, 5 times / second) in the standby state. In addition, the in-vehicle device 14 performs scanning processing for receiving the second advertisement signal transmitted from the FOB 16 at a predetermined processing frequency (for example, 30%).

Further, as shown in FIG. 2A, the FOB 16 transmits a second advertisement signal toward the periphery of the FOB 16 at a predetermined transmission frequency (for example, 10 times / second). Further, the FOB 16 performs a scanning process for receiving the first advertisement signal transmitted from the in-vehicle device 14 at a predetermined processing frequency (for example, 10%).

Then, as shown in FIG. 2B, when the FOB 16 enters the communication area and the user presses the unlock button 215 of the FOB 16, the FOB 16 increases the transmission frequency of the second advertisement signal.

After that, as shown in FIG. 2C, when the vehicle-mounted device 14 receives the second advertisement signal transmitted from the FOB 16, the vehicle-mounted device 14 increases the transmission frequency of the first advertisement signal.

Further, as shown in FIG. 2D, when the FOB 16 receives the first advertisement signal transmitted from the vehicle-mounted device 14, it establishes a Bluetooth wireless communication connection with the vehicle-mounted device 14. When the Bluetooth wireless communication connection with the FOB 16 is established, the in-vehicle device 14 unlocks the vehicle 12 and enables the user to use the vehicle 12.

As shown in FIG. 2, according to the wireless communication system 10 of the present embodiment, the frequency of transmission of the second advertisement signal by the FOB 16 can be reduced during the standby period shown in FIG. 2A, so that the power consumption of the FOB 16 can be reduced. It can be suppressed and the life of the battery built in the FOB 16 can be extended.

Further, as shown in FIG. 2, according to the wireless communication system 10 of the present embodiment, when the user presses the unlock button 215 of the FOB 16, the frequency of transmission of the second advertisement signal by the FOB 16 can be increased. , The reception response of the second advertisement signal by the in-vehicle device 14 can be enhanced.

(Hardware configuration of in-vehicle device 14 and FOB 16)
FIG. 3 is a diagram showing a hardware configuration of the in-vehicle device 14 and the FOB 16 according to the embodiment. As shown in FIG. 3, the in-vehicle device 14 includes a CPU (Central Processing Unit) 201, a ROM (Read Only Memory) 202, a RAM (Random Access Memory) 203, and a wireless communication module 204. The hardware is connected to each other via bus 205.

The CPU 201 controls the operation of the in-vehicle device 14 by executing various programs stored in the ROM 202. ROM 202 is a non-volatile memory. For example, the ROM 202 stores a program executed by the CPU 201, data necessary for the CPU 201 to execute the program, and the like. The RAM 203 is a main storage device such as a DRAM (Dynamic Random Access Memory) or a SRAM (Static Random Access Memory). For example, the RAM 203 functions as a work area used by the CPU 201 when executing a program. The wireless communication module 204 performs Bluetooth wireless communication with the FOB 16. The wireless communication module 204 is a signal processing circuit that performs various signal processing (for example, amplification processing, coding / decoding processing, AD conversion / DA conversion processing, modulation / demodulation processing, filter processing, etc.), and various signals. It is configured to be equipped with a communication antenna or the like that transmits and receives radio waves corresponding to the above. For example, Bluetooth wireless communication uses a frequency band of 2.4 GHz.

On the other hand, as shown in FIG. 3, the FOB 16 includes a CPU 211, a ROM 212, a RAM 213, a wireless communication module 214, an unlock button 215, and a battery 216. The hardware is connected to each other via bus 217.

The CPU 211 controls the operation of the FOB 16 by executing various programs stored in the ROM 212. ROM 212 is a non-volatile memory. For example, the ROM 212 stores a program executed by the CPU 211, data necessary for the CPU 211 to execute the program, and the like. The RAM 213 is a main storage device such as a DRAM or an SRAM. For example, the RAM 213 functions as a work area used by the CPU 211 when executing a program. The wireless communication module 214 performs Bluetooth wireless communication with the in-vehicle device 14. The wireless communication module 214 is a signal processing circuit that performs various signal processing (for example, amplification processing, coding / decoding processing, AD conversion / DA conversion processing, modulation / demodulation processing, filter processing, etc.), and various signals. It is configured to be equipped with a communication antenna or the like that transmits and receives radio waves corresponding to the above.

The unlock button 215 is provided so as to be exposed from the case of the FOB 16. The unlock button 215 is pressed by the user when the user actively unlocks the vehicle 12. The battery 216 supplies electric power to each part of the FOB 16. For example, as the battery 216, various coin-type primary batteries (for example, manganese batteries, alkaline batteries, mercury batteries, etc.) are used.

(Functional configuration of in-vehicle device 14 and FOB 16)
FIG. 4 is a diagram showing a functional configuration of the in-vehicle device 14 and the FOB 16 according to the embodiment.

As shown in FIG. 4, the in-vehicle device 14 includes a wireless communication unit 301, an advertisement signal transmission unit 302, a scan processing unit 303, an operation detection unit 304, a first transmission frequency control unit 305, and an electric lock control device 306. ..

The wireless communication unit 301 performs Bluetooth wireless communication with the FOB 16. In addition, the wireless communication unit 301 transmits the first advertisement signal and receives the second advertisement signal. The wireless communication unit 301 is realized by the wireless communication module 204 shown in FIG.

The advertisement signal transmission unit 302 transmits the first advertisement signal toward the periphery of the vehicle 12 via the wireless communication unit 301 at a predetermined transmission frequency. The transmission frequency of the first advertisement signal by the advertisement signal transmission unit 302 can be changed by the first transmission frequency control unit 305.

The scan processing unit 303 performs a scan process for receiving the second advertisement signal transmitted from the FOB 16 via the wireless communication unit 301 at a predetermined processing frequency (for example, 30%).

The operation detection unit 304 detects a predetermined operation on the vehicle 12. It is preferable that the predetermined operation is an operation performed before the user starts driving the vehicle 12. In particular, it is preferable that the predetermined operation is an operation performed by the user to start the engine of the vehicle 12. For example, predetermined operations include brake lever operation, clutch lever operation, brake pedal operation, throttle opening operation, switch (for example, main switch, cell button, etc.) operation, stand retracting operation, and the like.

The first transmission frequency control unit 305 controls the transmission frequency of the first advertisement signal by the advertisement signal transmission unit 302. For example, in the first transmission frequency control unit 305, when the second advertisement signal transmitted from the FOB 16 is received by the scan processing unit 303, or when the operation detection unit 304 detects a predetermined operation on the vehicle 12. In this case, the frequency of transmission of the first advertisement signal by the advertisement signal transmission unit 302 is increased. As an example, the first transmission frequency control unit 305 increases the transmission frequency of the first advertisement signal from "5 times / second" to "50 times / second".

The electric lock control device 306 unlocks the vehicle 12 when the Bluetooth wireless communication connection with the FOB 16 is established by the wireless communication unit 301. When the vehicle 12 is unlocked by the electric lock control device 306, the engine can be started and various electrical components can be used, that is, the vehicle 12 can run. When the vehicle 12 is an electric vehicle, the electric lock control device 306 may switch between the use of the motor and the non-use of the motor. That is, it suffices if the vehicle 12 can be switched to a state in which the vehicle 12 can travel by unlocking the electric lock control device 306.

Each function of the in-vehicle device 14 shown in FIG. 4 (advertisement signal transmission unit 302, scan processing unit 303, operation detection unit 304, first transmission frequency control unit 305, and electric lock control device 306) is, for example, in-vehicle. In the device 14, the program stored in the ROM 202 is executed by the CPU 201.

Further, as shown in FIG. 4, the FOB 16 includes a wireless communication unit 311, an advertisement signal transmission unit 312, a scan processing unit 313, an operation detection unit 314, a second transmission frequency control unit 315, and a wireless communication connection control unit 316. Be prepared.

The wireless communication unit 311 performs Bluetooth wireless communication with the in-vehicle device 14. In addition, the wireless communication unit 311 transmits the second advertisement signal and receives the first advertisement signal. The wireless communication unit 311 is realized by the wireless communication module 214 shown in FIG.

The advertisement signal transmission unit 312 transmits a second advertisement signal toward the periphery of the FOB 16 via the wireless communication unit 311 at a predetermined transmission frequency. The transmission frequency of the second advertisement signal by the advertisement signal transmission unit 312 may be changed by the second transmission frequency control unit 315.

The scan processing unit 313 performs scanning processing for receiving the first advertisement signal transmitted from the in-vehicle device 14 via the wireless communication unit 311 at a predetermined processing frequency (for example, 10%).

The operation detection unit 314 detects a pressing operation on the unlock button 215. For example, in the FOB 16, an operation signal is generated when the unlock button 215 is pressed. By detecting this operation signal, the operation detection unit 314 detects a pressing operation on the unlock button 215.

The second transmission frequency control unit 315 controls the transmission frequency of the second advertisement signal by the advertisement signal transmission unit 312. For example, the second transmission frequency control unit 315 increases the transmission frequency of the second advertisement signal by the advertisement signal transmission unit 312 when the operation detection unit 314 detects the pressing operation of the unlock button 215. As an example, the second transmission frequency control unit 315 increases the transmission frequency of the second advertisement signal from "10 times / second" to "50 times / second".

The wireless communication connection control unit 316 controls the Bluetooth wireless communication connection with the in-vehicle device 14 by the wireless communication unit 311. For example, when the wireless communication connection control unit 316 receives the first advertisement signal transmitted from the vehicle-mounted device 14 by the scan processing unit 313, the wireless communication connection control unit 316 transmits a wireless communication connection request to the vehicle-mounted device 14 via the wireless communication unit 311. By doing so, the wireless communication unit 311 establishes a Bluetooth wireless communication connection with the in-vehicle device 14.

Each function of the FOB 16 shown in FIG. 4 (advertisement signal transmission unit 312, scan processing unit 313, operation detection unit 314, second transmission frequency control unit 315, and wireless communication connection control unit 316) is described in, for example, the FOB 16. , The program stored in the ROM 212 is realized by the CPU 211 executing the program.

(Procedure for processing by the in-vehicle device 14)
FIG. 5 is a flowchart showing a processing procedure by the in-vehicle device 14 according to the embodiment. FIG. 5 shows a procedure of processing by the in-vehicle device 14 for realizing the first example and the second example of the processing by the wireless communication system 10 shown in FIGS. 1 and 2.

First, the scan processing unit 303 sets "30%" for the processing frequency of the scan processing performed by itself (step S501).

Next, the first transmission frequency control unit 305 sets "5 times / sec" for the transmission frequency of the first advertisement signal by the advertisement signal transmission unit 302 (step S502).

Next, the operation detection unit 304 determines whether or not a predetermined operation on the vehicle 12 has been detected (step S503).

When it is determined in step S503 that a predetermined operation on the vehicle 12 has been detected (step S503: Yes), the first transmission frequency control unit 305 sets the transmission frequency of the first advertisement signal by the advertisement signal transmission unit 302. “50 times / sec” is set (step S504). Then, the in-vehicle device 14 proceeds to step S505.

On the other hand, if it is determined in step S503 that the predetermined operation on the vehicle 12 has not been detected (step S503: No), the in-vehicle device 14 proceeds to step S505.

In step S505, the scan processing unit 303 determines whether or not the time for scan processing based on the processing frequency set in step S501 has arrived.

In step S505, when it is determined that the time for scanning processing has arrived (step S505: Yes), the scanning processing unit 303 executes scanning processing (step S506).

Then, the scan processing unit 303 determines whether or not the second advertisement signal transmitted from the FOB 16 has been received in the scan process of step S506 (step S507).

When it is determined in step S507 that the second advertisement signal has been received (step S507: Yes), the first transmission frequency control unit 305 sets the transmission frequency of the first advertisement signal by the advertisement signal transmission unit 302 to " "50 times / sec" is set (step S508). Then, the in-vehicle device 14 returns the process to step S503.

On the other hand, if it is determined in step S507 that the second advertisement signal has not been received (step S507: No), the scan processing unit 303 requests the wireless communication connection transmitted from the FOB 16 in the scan process of step S506. Is determined (step S509).

When it is determined in step S509 that the wireless communication connection request has been received (step S509: Yes), the wireless communication unit 301 performs a wireless communication connection process for establishing a Bluetooth wireless communication connection with the FOB 16 (step S513). ). Then, the in-vehicle device 14 ends a series of processes shown in FIG.

In step S505, when it is determined that the time for scanning processing has not arrived (step S505: No), or in step S509, it is determined that the wireless communication connection request has not been received (step S509: No). ), The advertisement signal transmission unit 302 determines whether or not the transmission time of the first advertisement signal based on the processing frequency set at that time has arrived (step S510).

When it is determined in step S510 that the transmission time of the first advertisement signal has arrived (step S510: Yes), the advertisement signal transmission unit 302 transmits the first advertisement signal toward the periphery of the vehicle 12 (step S510: Yes). Step S511). Then, the in-vehicle device 14 proceeds to step S512.

On the other hand, if it is determined in step S510 that the transmission time of the first advertisement signal has not arrived (step S510: No), the in-vehicle device 14 proceeds to step S512.

In step S512, the first transmission frequency control unit 305 determines whether or not a predetermined time (for example, 1 minute) has elapsed after increasing the transmission frequency of the first advertisement signal.

If it is determined in step S512 that a predetermined time has elapsed since the transmission frequency of the first advertisement signal was increased (step S512: Yes), the in-vehicle device 14 returns the process to step S502.

On the other hand, if it is determined in step S512 that the predetermined time has not elapsed since the transmission frequency of the first advertisement signal was increased (step S512: No), the in-vehicle device 14 returns the process to step S503.

(Procedure of processing by FOB16)
FIG. 6 is a flowchart showing a processing procedure by the FOB 16 according to the embodiment. FIG. 6 shows a procedure of processing by FOB 16 for realizing the first example and the second example of processing by the wireless communication system 10 shown in FIGS. 1 and 2.

First, the scan processing unit 313 sets "10%" for the processing frequency of the scan processing performed by itself (step S601).

Next, the second transmission frequency control unit 315 sets "10 times / sec" for the transmission frequency of the second advertisement signal by the advertisement signal transmission unit 312 (step S602).

Next, the operation detection unit 314 determines whether or not the pressing operation on the unlock button 215 is detected (step S603).

When it is determined in step S603 that the pressing operation on the unlock button 215 is detected (step S603: Yes), the second transmission frequency control unit 315 transmits the second advertisement signal by the advertisement signal transmission unit 312. Is set to "50 times / sec" (step S604). Then, FOB 16 proceeds to step S605.

On the other hand, if it is determined in step S603 that the pressing operation on the unlock button 215 has not been detected (step S603: No), the FOB 16 proceeds to step S605.

In step S605, the scan processing unit 313 determines whether or not the time for scan processing based on the processing frequency set in step S601 has arrived.

In step S605, when it is determined that the time for scanning processing has arrived (step S605: Yes), the scanning processing unit 313 executes the scanning processing (step S606).

Then, the scan processing unit 313 determines whether or not the first advertisement signal transmitted from the in-vehicle device 14 has been received in the scan process of step S606 (step S607).

When it is determined in step S607 that the first advertisement signal has been received (step S607: Yes), the wireless communication connection control unit 316 transmits a wireless communication connection request to the in-vehicle device 14 via the wireless communication unit 311. (Step S608). Then, the wireless communication unit 311 performs a wireless communication connection process for establishing a Bluetooth wireless communication connection with the in-vehicle device 14 (step S612). After that, the FOB 16 ends a series of processes shown in FIG.

In step S605, when it is determined that the time for scanning processing has not arrived (step S605: No), or in step S607, it is determined that the first advertisement signal has not been received (step S607: No). No), the advertisement signal transmission unit 312 determines whether or not the transmission time of the second advertisement signal based on the processing frequency set at that time has arrived (step S609).

In step S609, when it is determined that the transmission time of the second advertisement signal has arrived (step S609: Yes), the advertisement signal transmission unit 312 transmits the second advertisement signal toward the periphery of the FOB 16 (step S609: Yes). S610). Then, FOB 16 proceeds to step S611.

On the other hand, if it is determined in step S609 that the transmission time of the second advertisement signal has not arrived (step S609: No), the FOB 16 proceeds to step S611.

In step S611, the second transmission frequency control unit 315 determines whether or not a predetermined time (for example, 1 minute) has elapsed after increasing the transmission frequency of the second advertisement signal.

If it is determined in step S611 that a predetermined time has elapsed since the transmission frequency of the second advertisement signal was increased (step S611: Yes), the FOB 16 returns the process to step S602.

On the other hand, if it is determined in step S611 that the predetermined time has not elapsed since the transmission frequency of the second advertisement signal was increased (step S611: No), the FOB 16 returns the process to step S603.

(First example of communication sequence by wireless communication system 10)
FIG. 7 is a diagram showing a first example of a communication sequence by the wireless communication system 10 according to the embodiment. FIG. 7 shows a communication sequence corresponding to the first example of processing by the wireless communication system 10 shown in FIG.

As shown in FIG. 7, the in-vehicle device 14 transmits the first advertisement signal toward the periphery of the vehicle 12 at a predetermined low frequency of transmission (for example, 5 times / second) in the standby state.

Further, as shown in FIG. 7, the FOB 16 transmits a second advertisement signal toward the periphery of the FOB 16 at a predetermined low frequency (for example, 10 times / sec).

Then, as shown in FIG. 7, when the in-vehicle device 14 receives the second advertisement signal transmitted from the FOB 16 by the scanning process, the in-vehicle device 14 has a predetermined high frequency of transmission (for example, 50 times / second). Then, the first advertisement signal is transmitted toward the periphery of the vehicle 12. As a result, the in-vehicle device 14 temporarily increases the possibility that the first advertisement signal is received by the FOB 16.

Then, as shown in FIG. 7, when the FOB 16 receives the first advertisement signal transmitted from the vehicle-mounted device 14, it transmits a wireless communication connection request to the vehicle-mounted device 14. Using this wireless communication connection request as a trigger, the FOB 16 and the in-vehicle device 14 establish a Bluetooth wireless communication connection with each other.

As described above, in the wireless communication system 10 of the present embodiment, the transmission frequency of the first advertisement signal of the in-vehicle device 14 is kept low in the standby state, and when the user approaches the vehicle 12, the in-vehicle device 14 causes the first advertisement signal to be transmitted. It is possible to increase the transmission frequency of the advertisement signal of 1. Therefore, the wireless communication system 10 of the present embodiment can change the transmission frequency of the first advertisement signal transmitted from the in-vehicle device 14 to the FOB 16 at an appropriate timing.

(Second example of communication sequence by wireless communication system 10)
FIG. 8 is a diagram showing a second example of a communication sequence by the wireless communication system 10 according to the embodiment. FIG. 8 shows a communication sequence corresponding to the second example of processing by the wireless communication system 10 shown in FIG.

As shown in FIG. 8, the in-vehicle device 14 transmits the first advertisement signal toward the periphery of the vehicle 12 at a predetermined low frequency of transmission (for example, 5 times / second) in the standby state.

Further, as shown in FIG. 8, the FOB 16 transmits a second advertisement signal toward the periphery of the FOB 16 at a predetermined low frequency (for example, 10 times / sec).

Then, as shown in FIG. 8, when the user presses the unlock button 215 of the FOB 16, the FOB 16 is directed toward the periphery of the FOB 16 at a predetermined high frequency of transmission (for example, 50 times / second). Advertisement signal is sent. This causes the FOB 16 to temporarily increase the likelihood that the vehicle-mounted device 14 will receive the second advertisement signal.

Then, as shown in FIG. 8, when the in-vehicle device 14 receives the second advertisement signal transmitted from the FOB 16 by the scanning process, the in-vehicle device 14 has a predetermined high frequency of transmission (for example, 50 times / second). Then, the first advertisement signal is transmitted toward the periphery of the vehicle 12. As a result, the in-vehicle device 14 temporarily increases the possibility that the first advertisement signal is received by the FOB 16.

Then, as shown in FIG. 8, when the FOB 16 receives the first advertisement signal transmitted from the vehicle-mounted device 14, it transmits a wireless communication connection request to the vehicle-mounted device 14. Using this wireless communication connection request as a trigger, the FOB 16 and the in-vehicle device 14 establish a Bluetooth wireless communication connection with each other.

As described above, in the wireless communication system 10 of the present embodiment, when the user presses the unlock button 215 to immediately unlock the vehicle 12, the frequency of transmission of the second advertisement signal by the FOB 16 can be increased. As a result, the timing at which the in-vehicle device 14 increases the transmission frequency of the first advertisement signal can be accelerated, and as a result, the timing at which the Bluetooth wireless communication connection is made can be accelerated.

(First modification of the processing procedure by the in-vehicle device 14)
FIG. 9 is a flowchart showing a first modification of the processing procedure by the in-vehicle device 14 according to the embodiment. In the flowchart shown in FIG. 9, the same processing steps as those in the flowchart shown in FIG. 5 are assigned the same step numbers as those in FIG. Hereinafter, changes to the flowchart shown in FIG. 9 from the flowchart shown in FIG. 5 will be described. The flowchart shown in FIG. 9 is different from the flowchart shown in FIG. 5 in that steps S508-1 to S508-4 are provided instead of step S508. Further, the FOB 16 includes the ID of the vehicle-mounted device 14 and the information that can identify the type of the device of the FOB 16 in the second advertisement signal transmitted to the vehicle-mounted device 14 so as to correspond to the flowchart shown in FIG.

In the flowchart shown in FIG. 9, when it is determined in step S507 that the second advertisement signal has been received (step S507: Yes), the scan processing unit 303 determines that the ID included in the received advertisement signal is It is determined whether or not the ID of the vehicle-mounted device 14 registered in the vehicle-mounted device 14 matches (step S508-1).

If it is determined in step S508-1 that the IDs do not match (step S508-1: No), the in-vehicle device 14 returns the process to step S503.

On the other hand, when it is determined in step S508-1 that the IDs match (step S508-1: Yes), the source of the second advertisement signal received by the first transmission frequency control unit 305 is FOB16. Whether or not it is determined (step S508-2).

When it is determined in step S508-2 that the source of the second advertisement signal is FOB16 (step S508-2: Yes), the first transmission frequency control unit 305 is the first by the advertisement signal transmission unit 302. "100 times / sec" is set for the transmission frequency of the advertisement signal of (step S508-3). Then, the in-vehicle device 14 returns the process to step S503.

On the other hand, in step S508-2, when it is determined that the source of the second advertisement signal is not FOB16 (step S508-2: No), the first transmission frequency control unit 305 is operated by the advertisement signal transmission unit 302. “50 times / sec” is set for the transmission frequency of the first advertisement signal (step S508-4). Then, the in-vehicle device 14 returns the process to step S503. The case where the source of the second advertisement signal is not FOB16 is, for example, the case where the source of the second advertisement signal is a smartphone, a tablet terminal, or the like.

According to the flowchart shown in FIG. 9, the in-vehicle device 14 can appropriately set the transmission frequency of the transmission frequency of the first advertisement signal according to the type of the device from which the second advertisement signal is transmitted.

(Second modification of the processing procedure by the in-vehicle device 14)
FIG. 10 is a flowchart showing a second modification of the processing procedure by the in-vehicle device 14 according to the embodiment. In the flowchart shown in FIG. 10, the same processing steps as those in the flowchart shown in FIG. 5 are assigned the same step numbers as those in FIG. Hereinafter, changes in the flowchart shown in FIG. 10 from the flowchart shown in FIG. 5 will be described. The flowchart shown in FIG. 10 is different from the flowchart shown in FIG. 5 in that steps S508-1 to S508-4 are provided instead of step S508. Further, the FOB 16 includes the ID of the FOB 16 in the second advertisement signal transmitted to the in-vehicle device 14 so as to correspond to the flowchart shown in FIG. Examples of the ID of the FOB 16 include a mobile phone number, a MAC address, an ID dedicated to the wireless communication system, and the like, but the ID is not limited to these as long as the FOB 16 can be uniquely identified. Further, the FOB 16 can include a required value of the transmission frequency of the first advertisement signal. For example, the FOB 16 may determine the required value of the transmission frequency of the first advertisement signal according to the remaining amount of the built-in battery 216.

In the flowchart shown in FIG. 10, when it is determined in step S507 that the second advertisement signal has been received (step S507: Yes), the scan processing unit 303 has an ID included in the received advertisement signal. It is determined whether or not the ID of the FOB 16 registered in the in-vehicle device 14 matches (step S508-1).

If it is determined in step S508-1 that the IDs do not match (step S508-1: No), the in-vehicle device 14 returns the process to step S503.

On the other hand, when it is determined in step S508-1 that the IDs match (step S508-1: Yes), the first transmission frequency control unit 305 adds the first advertisement signal to the received second advertisement signal. It is determined whether or not the required value of the transmission frequency of is set (step S508-2).

When it is determined in step S508-2 that the required value of the transmission frequency of the first advertisement signal is set (step S508-2: Yes), the first transmission frequency control unit 305 is the advertisement signal transmission unit. The required value is set for the transmission frequency of the first advertisement signal by 302 (step S508-3). Then, the in-vehicle device 14 returns the process to step S503.

On the other hand, when it is determined in step S508-2 that the required value of the transmission frequency of the first advertisement signal is not set (step S508-2: No), the first transmission frequency control unit 305 determines the advertisement signal. “50 times / sec” is set for the transmission frequency of the first advertisement signal by the transmission unit 302 (step S508-4). Then, the in-vehicle device 14 returns the process to step S503.

According to the flowchart shown in FIG. 10, the FOB 16 can cause the in-vehicle device 14 to set an arbitrary required value (that is, a transmission frequency suitable for the FOB 16 itself) as the transmission frequency of the first advertisement signal. ..

(Second example of processing by wireless communication system 10)
FIG. 11 is a diagram showing a third example of processing by the wireless communication system 10 according to the embodiment.

As shown in FIG. 11A, the in-vehicle device 14 transmits the first advertisement signal toward the periphery of the vehicle 12 at a predetermined transmission frequency (for example, 5 times / second) in the standby state. In addition, the in-vehicle device 14 performs scanning processing for receiving the second advertisement signal transmitted from the FOB 16 at a predetermined processing frequency (for example, 30%).

Further, as shown in FIG. 11A, the FOB 16 does not transmit the second advertisement signal. Further, the FOB 16 performs a scanning process for receiving the first advertisement signal transmitted from the in-vehicle device 14 at a predetermined processing frequency (for example, 10%).

Then, as shown in FIG. 11B, when the FOB 16 enters the communication area and the user presses the unlock button 215 of the FOB 16, the FOB 16 has a high transmission frequency (for example, 50 times / sec) toward the periphery of the FOB 16. ), The second advertisement signal is transmitted.

After that, as shown in FIG. 11C, when the in-vehicle device 14 receives the second advertisement signal transmitted from the FOB 16, the in-vehicle device 14 increases the transmission frequency of the first advertisement signal (for example, 50 times / sec). ..

Further, as shown in FIG. 11D, when the FOB 16 receives the first advertisement signal transmitted from the vehicle-mounted device 14, it establishes a Bluetooth wireless communication connection with the vehicle-mounted device 14. When the Bluetooth wireless communication connection with the FOB 16 is established, the in-vehicle device 14 unlocks the vehicle 12 and enables the user to use the vehicle 12.

As shown in FIG. 11, according to the wireless communication system 10 of the present embodiment, since the second advertisement signal is not transmitted by the FOB 16 during the standby shown in FIG. 11A, the power consumption of the FOB 16 is suppressed and the FOB 16 is suppressed. It is possible to extend the life of the battery built into the unit.

(Procedure for processing by the in-vehicle device 14)
FIG. 12 is a flowchart showing a processing procedure by the in-vehicle device 14 according to the embodiment. FIG. 12 shows a procedure of processing by the in-vehicle device 14 for realizing a third example of processing by the wireless communication system 10 shown in FIG.

First, the scan processing unit 303 sets "30%" for the processing frequency of the scan processing performed by itself (step S1201).

Next, the first transmission frequency control unit 305 sets "5 times / sec" for the transmission frequency of the first advertisement signal by the advertisement signal transmission unit 302 (step S1202).

Next, the scan processing unit 303 determines whether or not the time for scanning processing based on the processing frequency set in step S1201 has arrived (step S1203).

In step S1203, when it is determined that the time for scanning processing has arrived (step S1203: Yes), the scanning processing unit 303 executes scanning processing (step S1204).

Then, the scan processing unit 303 determines whether or not the second advertisement signal transmitted from the FOB 16 has been received in the scan process of step S1204 (step S1205).

When it is determined in step S1205 that the second advertisement signal has been received (step S1205: Yes), the first transmission frequency control unit 305 sets the transmission frequency of the first advertisement signal by the advertisement signal transmission unit 302 to " "50 times / sec" is set (step S1206). Then, the in-vehicle device 14 returns the process to step S1203.

On the other hand, if it is determined in step S1205 that the second advertisement signal has not been received (step S1205: No), the scan processing unit 303 requests the wireless communication connection transmitted from the FOB 16 in the scan process of step S1204. Is determined (step S1207).

When it is determined in step S1207 that the wireless communication connection request has been received (step S1207: Yes), the wireless communication unit 301 performs a wireless communication connection process for establishing a Bluetooth wireless communication connection with the FOB 16 (step S1211). ). Then, the in-vehicle device 14 ends a series of processes shown in FIG.

In step S1203, when it is determined that the time for scanning processing has not arrived (step S1203: No), or in step S1207, it is determined that the wireless communication connection request has not been received (step S1207: No). ), The advertisement signal transmission unit 302 determines whether or not the transmission time of the first advertisement signal based on the processing frequency set at that time has arrived (step S1208).

When it is determined in step S1208 that the transmission time of the first advertisement signal has arrived (step S1208: Yes), the advertisement signal transmission unit 302 transmits the first advertisement signal toward the periphery of the vehicle 12 (step S1208: Yes). Step S1209). Then, the in-vehicle device 14 proceeds to step S1210.

On the other hand, if it is determined in step S1208 that the transmission time of the first advertisement signal has not arrived (step S1208: No), the in-vehicle device 14 proceeds to step S1210.

In step S1210, the first transmission frequency control unit 305 determines whether or not a predetermined time (for example, 1 minute) has elapsed after increasing the transmission frequency of the first advertisement signal.

If it is determined in step S1210 that a predetermined time has elapsed since the transmission frequency of the first advertisement signal was increased (step S1210: Yes), the in-vehicle device 14 returns the process to step S1202.

On the other hand, if it is determined in step S1210 that the predetermined time has not elapsed since the transmission frequency of the first advertisement signal was increased (step S1210: No), the in-vehicle device 14 returns the process to step S1203.

(Procedure of processing by FOB16)
FIG. 13 is a flowchart showing a processing procedure by the FOB 16 according to the embodiment. FIG. 13 shows a procedure of processing by FOB 16 for realizing a third example of processing by the wireless communication system 10 shown in FIG.

First, the scan processing unit 313 sets "10%" for the processing frequency of the scan processing performed by itself (step S1301).

Next, the operation detection unit 314 determines whether or not the pressing operation on the unlock button 215 is detected (step S1302).

When it is determined in step S1302 that the pressing operation on the unlock button 215 is detected (step S1302: Yes), the second transmission frequency control unit 315 transmits the second advertisement signal by the advertisement signal transmission unit 312. Is set to "50 times / sec" (step S1303). Further, the second transmission frequency control unit 315 sets the transmission flag to "ON" (step S1304). After that, FOB 16 proceeds to step S1305.

On the other hand, if it is determined in step S1302 that the pressing operation on the unlock button 215 is not detected (step S1302: No), the FOB 16 proceeds to step S1305.

In step S1305, the scan processing unit 313 determines whether or not the time for scan processing based on the processing frequency set in step S1301 has arrived.

In step S1305, when it is determined that the time for scanning processing has arrived (step S1305: Yes), the scanning processing unit 313 executes the scanning processing (step S1306).

Then, the scan processing unit 313 determines whether or not the first advertisement signal transmitted from the in-vehicle device 14 has been received in the scan process in step S1306 (step S1307).

When it is determined in step S1307 that the first advertisement signal has been received (step S1307: Yes), the wireless communication connection control unit 316 transmits a wireless communication connection request to the in-vehicle device 14 via the wireless communication unit 311. (Step S1308). Then, the wireless communication unit 311 performs a wireless communication connection process for establishing a Bluetooth wireless communication connection with the in-vehicle device 14 (step S1314). After that, the FOB 16 ends a series of processes shown in FIG.

In step S1305, it is determined that the time for scanning processing has not arrived (step S1305: No), or in step S1307, it is determined that the first advertisement signal has not been received (step S1307: No). No), the advertisement signal transmission unit 312 determines whether or not the transmission flag is set to "ON" (step S1309).

If it is determined in step S1309 that "ON" is not set in the transmission flag (step S1309: No), FOB16 returns the process to step S1302.

On the other hand, when it is determined in step S1309 that the transmission flag is set to "ON" (step S1309: Yes), the advertisement signal transmission unit 312 advertises a second advertisement based on the processing frequency set at that time. It is determined whether or not the signal transmission time has arrived (step S1310).

When it is determined in step S1310 that the transmission time of the second advertisement signal has arrived (step S1310: Yes), the advertisement signal transmission unit 312 transmits the second advertisement signal toward the periphery of the FOB 16 (step S1310). S1311). Then, FOB 16 proceeds to step S1312.

On the other hand, if it is determined in step S1310 that the transmission time of the second advertisement signal has not arrived (step S1310: No), the FOB 16 proceeds to step S1312.

In step S1312, the second transmission frequency control unit 315 determines whether or not a predetermined time (for example, 1 minute) has elapsed since the transmission flag was set to "ON".

In step S1312, when it is determined that a predetermined time has elapsed since the transmission flag was set to "ON" (step S1312: Yes), the second transmission frequency control unit 315 sets the transmission flag to "OFF". (Step S1313). Then, the FOB 16 returns the process to step S1302.

On the other hand, if it is determined in step S1312 that the predetermined time has not elapsed since the transmission flag was set to "ON" (step S1312: No), the FOB 16 returns the process to step S1305.

(Third example of communication sequence by wireless communication system 10)
FIG. 14 is a diagram showing a third example of a communication sequence by the wireless communication system 10 according to the embodiment. FIG. 14 shows a communication sequence corresponding to a third example of processing by the wireless communication system 10 shown in FIG.

As shown in FIG. 14, the in-vehicle device 14 transmits the first advertisement signal toward the periphery of the vehicle 12 at a predetermined low frequency of transmission (for example, 5 times / second) in the standby state. On the other hand, as shown in FIG. 14, the FOB 16 does not transmit the second advertisement signal.

Then, as shown in FIG. 14, when the user presses the unlock button 215 of the FOB 16, the FOB 16 transmits a predetermined high frequency (for example, 50 times /) from the state where the second advertisement signal is not transmitted. In seconds), a second advertisement signal is transmitted toward the periphery of the FOB 16. As a result, the FOB 16 transmits the second advertisement signal, which is likely to be received by the in-vehicle device 14, for a certain period of time.

Then, as shown in FIG. 14, when the in-vehicle device 14 receives the second advertisement signal transmitted from the FOB 16 by the scanning process, the in-vehicle device 14 has a predetermined high frequency of transmission (for example, 50 times / second). Then, the first advertisement signal is transmitted toward the periphery of the vehicle 12. As a result, the in-vehicle device 14 temporarily increases the possibility that the first advertisement signal is received by the FOB 16.

Then, as shown in FIG. 14, when the FOB 16 receives the first advertisement signal transmitted from the vehicle-mounted device 14, it transmits a wireless communication connection request to the vehicle-mounted device 14. Using this wireless communication connection request as a trigger, the FOB 16 and the in-vehicle device 14 establish a Bluetooth wireless communication connection with each other.

As described above, the wireless communication system 10 of the present embodiment can prevent the FOB 16 from transmitting the second advertisement signal in the standby state until the user presses the unlock button 215. As a result, the wireless communication system 10 of the present embodiment can suppress the power consumption of the FOB 16 in the standby state until the user presses the unlock button 215.

As described above, in the wireless communication system 10 according to the embodiment, the FOB 16 includes an advertisement signal transmission unit 312 for transmitting a second advertisement signal, and the in-vehicle device 14 includes a second advertisement signal transmitted from the FOB 16. Is received, the first transmission frequency control unit 305 for increasing the transmission frequency of the first advertisement signal is provided.

As a result, the wireless communication system 10 according to the embodiment increases the transmission frequency of the first advertisement signal when the user approaches the vehicle 12, and the possibility that the first advertisement signal is received by the FOB 16 is increased. Can be enhanced. Therefore, the wireless communication system 10 according to the embodiment can change the transmission frequency of the first advertisement signal transmitted from the in-vehicle device 14 to the FOB 16 at an appropriate timing. That is, in the wireless communication system 10 according to the embodiment, when the user is away from the vehicle 12, the frequency of transmitting the first advertisement signal is low, and the decrease in the remaining battery level can be suppressed. On the other hand, in the wireless communication system 10 according to the embodiment, when the user is near the vehicle 12, the transmission frequency of the first advertisement signal is high, and before the user starts the operation of the vehicle 12, the vehicle 12 It can be kept in a state where it can be operated.

Further, in the wireless communication system 10 according to the embodiment, the first transmission frequency control unit 305 increases the transmission frequency of the first advertisement signal when a predetermined user operation is performed on the vehicle 12.

As a result, the wireless communication system 10 according to the embodiment increases the transmission frequency of the first advertisement signal when a predetermined user operation is performed on the vehicle 12, and the first advertisement signal is received by the FOB 16. It is possible to increase the possibility of communication. Therefore, the wireless communication system 10 according to the embodiment can change the transmission frequency of the first advertisement signal transmitted from the in-vehicle device 14 to the FOB 16 at an appropriate timing. That is, in the wireless communication system 10 according to the embodiment, even if the user approaches the vehicle 12, the electric lock is promptly performed if the user operates the vehicle 12 in the case where the vehicle 12 is still locked. The vehicle 12 is unlocked by the control device 306. Therefore, according to the wireless communication system 10 according to the embodiment, it is possible to keep the vehicle 12 in an operable state by the time the user starts driving the vehicle 12.

Further, in the wireless communication system 10 according to the embodiment, the predetermined user operation is an operation performed before the user starts driving the vehicle 12.

Thereby, the wireless communication system 10 according to the embodiment can increase the transmission frequency of the first advertisement signal without causing the user to perform a special operation.

Further, in the wireless communication system 10 according to the embodiment, the predetermined user operation is an operation performed by the user to start the engine of the vehicle 12.

Thereby, the wireless communication system 10 according to the embodiment can increase the transmission frequency of the first advertisement signal without causing the user to perform a special operation. Further, in the wireless communication system 10 according to the embodiment, since the battery is charged when the vehicle 12 starts the engine, the remaining amount of the battery remains even when the transmission frequency of the first advertisement signal is increased. The decrease can be suppressed.

Further, in the wireless communication system 10 according to the embodiment, the FOB 16 includes a second transmission frequency control unit 315 that increases the transmission frequency of the second advertisement signal when a predetermined user operation is performed on the FOB 16.

As a result, the wireless communication system 10 according to the embodiment receives the second advertisement signal by the in-vehicle device 14 by increasing the transmission frequency of the second advertisement signal when a predetermined user operation is performed on the FOB 16. It can increase the possibility of being done.

Further, in the wireless communication system 10 according to the embodiment, the first transmission frequency control unit 305 sets the transmission frequency of the first advertisement signal to the information set in the second advertisement signal transmitted from the FOB 16. Increase the transmission frequency according to the situation.

Thereby, in the wireless communication system 10 according to the embodiment, the in-vehicle device 14 can transmit the first advertisement signal at an appropriate transmission frequency according to the device from which the second advertisement signal is transmitted.

Further, in the wireless communication system 10 according to the embodiment, the second advertisement signal includes information indicating the type of the device that is the source of the second advertisement signal, and the first transmission frequency control unit 305 is the first. The transmission frequency of the advertisement signal of 1 is increased to the transmission frequency according to the type of FOB 16.

As a result, in the wireless communication system 10 according to the embodiment, the in-vehicle device 14 can transmit the first advertisement signal at an appropriate transmission frequency according to the type of the device from which the second advertisement signal is transmitted. can. That is, in the wireless communication system 10 according to the embodiment, the vehicle 12 can be quickly operated by extremely increasing the transmission frequency of the first advertisement signal for the FOB 16 having a small battery capacity and a low scanning frequency. It can be in a possible state. On the other hand, the wireless communication system 10 according to the embodiment solves the electric lock control device by setting the transmission frequency of the first advertisement signal to a medium level for the FOB 16 having a large battery capacity and a high scanning frequency. It is possible to control the battery consumption of the vehicle 12 in a well-balanced manner while reducing the possibility that the lock will be delayed. In the wireless communication system 10 according to the embodiment, it is sufficient that the electric lock control device 306 can be unlocked by the time the user drives the vehicle 12. Therefore, the wireless communication system 10 according to the embodiment does not need to extremely shorten the time until the Bluetooth wireless communication connection is established. Therefore, in the wireless communication system 10 according to the embodiment, it is preferable that the time until the Bluetooth wireless communication connection is established is shortened and the battery consumption is suppressed in a well-balanced manner.

Further, in the wireless communication system 10 according to the embodiment, the second advertisement signal includes the required value of the transmission frequency of the first advertisement signal, and the first transmission frequency control unit 305 is the first advertisement signal. Increase the transmission frequency to the required value.

As a result, in the wireless communication system 10 according to the embodiment, the in-vehicle device 14 transmits the first advertisement signal at an appropriate transmission frequency in response to a request from the device that transmits the second advertisement signal. Can be done. That is, the wireless communication system 10 according to the embodiment changes the transmission frequency of the first advertisement signal according to the scan frequency of the FOB 16, thereby suppressing the decrease in response and suppressing the battery consumption of the vehicle 12. It can be done in a well-balanced manner.

Further, in the wireless communication system 10 according to the embodiment, the second advertising signal includes the identification information of the vehicle-mounted device 14, and the first transmission frequency control unit 305 includes the vehicle-mounted advertising signal included in the second advertising signal. When the identification information of the device 14 matches the identification information stored in the vehicle-mounted device 14, the frequency of transmitting the first advertisement signal is increased.

Thereby, the wireless communication system 10 according to the embodiment increases the transmission frequency of the first advertisement signal when the second advertisement signal is received from the regular FOB 16.

Further, in the wireless communication system 10 according to the embodiment, the second advertisement signal includes the identification information of the FOB 16, and the first transmission frequency control unit 305 identifies the FOB 16 included in the second advertisement signal. When the information matches the identification information stored in the vehicle-mounted device 14, the frequency of transmitting the first advertisement signal is increased.

Thereby, the wireless communication system 10 according to the embodiment increases the transmission frequency of the first advertisement signal when the second advertisement signal is received from the regular FOB 16. Conversely, in the wireless communication system 10 according to the embodiment, even if the FOB (not shown) for another vehicle (not shown) approaches the user's vehicle 12, the first advertisement signal is transmitted. Since the frequency is kept low, the power consumption can be reduced.

Although one embodiment of the present invention has been described in detail above, the present invention is not limited to these embodiments, and various modifications or modifications are made within the scope of the gist of the present invention described in the claims. It can be changed.

This international application claims priority based on Japanese Patent Application No. 2020-023032 filed on February 14, 2020, and the entire contents of the application will be incorporated into this international application.

10 Wireless communication system 12 Vehicle 14 In-vehicle device 16 FOB (mobile terminal)
215 Unlock button 301 Wireless communication unit 302 Advertisement signal transmission unit 303 Scan processing unit 304 Operation detection unit 305 First transmission frequency control unit 306 Electric lock control device 311 Wireless communication unit 312 Advertisement signal transmission unit 313 Scan processing unit 314 Operation detection Unit 315 Second transmission frequency control unit 316 Wireless communication connection control unit

Claims (11)

With mobile terminals
It is equipped with an in-vehicle device that is mounted on the vehicle and is capable of wireless communication with the mobile terminal.
A wireless communication system in which a mobile terminal establishes a wireless communication connection with the vehicle-mounted device when the mobile terminal receives a first advertisement signal transmitted from the vehicle-mounted device.
The mobile terminal
It is equipped with an advertisement signal transmitter that transmits a second advertisement signal.
The in-vehicle device is
A wireless communication system including a first transmission frequency control unit that increases the transmission frequency of the first advertisement signal when the second advertisement signal transmitted from the mobile terminal is received. The first transmission frequency control unit is
The wireless communication system according to claim 1, wherein when a predetermined user operation is performed on the vehicle, the frequency of transmission of the first advertisement signal is increased. The predetermined user operation is
The wireless communication system according to claim 2, wherein the operation is performed before the user starts driving the vehicle. The predetermined user operation is
The wireless communication system according to claim 3, wherein the operation is performed by the user to start the engine of the vehicle. The mobile terminal
The invention according to any one of claims 1 to 4, further comprising a second transmission frequency control unit that increases the transmission frequency of the second advertisement signal when a predetermined user operation is performed on the mobile terminal. Wireless communication system. The first transmission frequency control unit is
Any of claims 1 to 5, wherein the transmission frequency of the first advertisement signal is increased to a transmission frequency according to the information set in the second advertisement signal transmitted from the mobile terminal. The wireless communication system according to one item. The second advertisement signal is
Contains information indicating the type of device that is the source of the second advertisement signal.
The first transmission frequency control unit is
The wireless communication system according to claim 6, wherein the transmission frequency of the first advertisement signal is increased to a transmission frequency according to the type of the device. The second advertisement signal is
Including the required value of the transmission frequency of the first advertisement signal,
The first transmission frequency control unit is
The wireless communication system according to claim 6, wherein the transmission frequency of the first advertisement signal is increased to the required value. The second advertisement signal is
Including the identification information of the in-vehicle device,
The first transmission frequency control unit is
When the identification information of the vehicle-mounted device included in the second advertisement signal matches the identification information stored in the vehicle-mounted device, the transmission frequency of the first advertisement signal is increased. The wireless communication system according to any one of claims 1 to 8. The second advertisement signal is
Including the identification information of the mobile terminal,
The first transmission frequency control unit is
When the identification information of the mobile terminal included in the second advertisement signal matches the identification information stored in the in-vehicle device, the transmission frequency of the first advertisement signal is increased. The wireless communication system according to any one of claims 1 to 8. The in-vehicle device used in a wireless communication system in which the mobile terminal establishes a wireless communication connection with the in-vehicle device when the mobile terminal receives a first advertisement signal transmitted from the in-vehicle device mounted on the vehicle. hand,
An in-vehicle device including a first transmission frequency control unit that increases the transmission frequency of the first advertisement signal when the second advertisement signal transmitted from the mobile terminal is received.

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