JP2003115908A - On-vehicle radio communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent wasteful transmission of a query signal in an on-vehicle radio communication device 10. SOLUTION: The on-vehicle radio communication device 10 acts like a slave device when an ignition switch IG is turned off and acts like a master device when the ignition switch IG is turned on. When the on-vehicle radio communication device 10 is set to be the master device, the on-vehicle radio communication device 10 transmits a query signal to a mobile phone to inquire of the mobile phone about the permission of radio connection, but when the on-vehicle radio communication device 10 is set to be the slave device, the on-vehicle radio communication device 10 stops transmission of the query signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle wireless communication device mounted on a vehicle and performing wireless communication in a master-slave system.

[0002]

2. Description of the Related Art Conventionally, a master-slave system has been proposed as a system for a plurality of wireless terminals to perform wireless communication. Hereinafter, an example in which the wireless terminals 1 to 4 perform wireless communication in the master-slave system will be described with reference to FIG.

The wireless terminal 1 is set as a master of a master-slave system, and the wireless terminals 2, 3, 4 are set as slaves, respectively. The wireless terminal 1 (master) inquires of each of the wireless terminals 2 to 4 (slave) whether or not wireless connection (link) is possible.

That is, at timing t1, the wireless terminal 1 (master) inquires of the wireless terminal 2 whether or not wireless connection is possible. At timing t2, when the wireless terminal 1 receives the wireless connection permission reply transmitted from the wireless terminal 2, the wireless connection between the wireless terminals 1 and 2 is started. Along with this, data is transmitted and received between the wireless terminals 1 and 2. Also, at timing t3, the wireless terminal 1 (master) inquires of the wireless terminal 3 whether or not wireless connection is possible.
Then, at timing t4, when the wireless terminal 1 receives the wireless connection permission reply transmitted from the wireless terminal 3, the wireless connection between the wireless terminals 1 and 3 is started. Along with this, data is transmitted and received between the wireless terminals 1 and 3.
Further, at timing t5, the wireless terminal 1 (master)
Inquires of the wireless terminal 4 whether or not wireless connection is possible. Then, at the timing t5, the wireless terminal 1 moves to the wireless terminal 4
Upon receiving the wireless connection permission response transmitted from the wireless communication terminal 1, the wireless connection between the wireless terminals 1 and 4 is started. With this,
Data is transmitted and received between the wireless terminals 1 and 4.

As described above, only the wireless terminal 1 (master) inquires as to whether or not wireless connection is possible, and the wireless terminals 2 to 4 (slave) each send a reply as to whether or not wireless connection is possible. Further, between the wireless terminal 1 and the wireless terminals 2 to 4, inquiries about availability of wireless connection, availability response, and data transmission / reception are performed in a time division manner.

[0006] In this way, since the wireless terminal 1 and the wireless terminals 2 to 4 share the roles, it is possible to perform good wireless communication between a plurality of wireless terminals without interference.

[0007]

By the way, the inventor of the present invention has found that an in-vehicle wireless device mounted on an automobile and supplied with power from an in-vehicle battery, and a portable device brought into a vehicle compartment (for example, a mobile phone, a small size). Master-slave short-range wireless communication with a personal computer (for example,
I considered doing the Bluetooth method).

According to a study by the inventor, the in-vehicle wireless device is set as a master, and regardless of whether the ignition switch is ON or OFF, the in-vehicle wireless device continuously transmits radio waves to inquire whether wireless connection is possible or not. With this configuration, even if the mobile phone is brought into the passenger compartment at any timing, the wireless connection between the in-vehicle wireless device and the mobile phone can be started well.

However, in order to favorably start the wireless connection between the mobile phone and the in-vehicle wireless device as described above, the in-vehicle wireless device transmits the radio wave to inquire whether the wireless connection is possible while the ignition switch is in the OFF state. If you continue to output,
The remaining capacity of the vehicle battery may be insufficient.

In view of the above points, the present invention provides an in-vehicle wireless communication device capable of suppressing shortage of remaining capacity of an in-vehicle battery by appropriately changing the role of the master-slave system. To aim.

[0011]

In order to achieve the above object, the present invention provides a portable device (20) in a master-slave system in which power is supplied from a vehicle-mounted battery (B) in the invention described in claim 1. An in-vehicle wireless communication device for wirelessly communicating with a vehicle, wherein a drive start switch (IG) of a vehicle drive device is OF
When it is determined that F is set, slave setting means (S200) for setting the in-vehicle wireless communication device as a slave,
When it is determined that the drive start switch is ON, a master setting unit (S100a, S150, S190) for setting the in-vehicle wireless communication device as a master is provided.

In this way, the drive start switch is turned on and off.
The FF properly switches the in-vehicle wireless communication device from one of the master and the slave to the other. Then, when the drive start switch is OFF, the drive start switch is set to OF by setting the in-vehicle wireless communication device to the slave.
In the F state, for example, the inquiry about the permission of the wireless connection can be stopped. Therefore, the power consumption can be reduced, and the shortage of the remaining capacity of the vehicle-mounted battery, that is, the battery exhaustion can be suppressed.

According to the second aspect of the invention, when the master setting means sets the master, the portable device is queried for permission of wireless connection, and when the slave setting means sets the slave, an inquiry is made. It may not be performed.

More specifically, the following claim 3,
It may be configured as described in 4, 5, and 6.

That is, according to the third aspect of the invention, the role determining means (S140) for determining whether the portable device is set as the slave based on the response from the portable device to the inquiry, and the portable device as the slave. When the role determination means determines that the master wireless communication device is set to the master continuation means (S15).
0) and are provided.

According to another aspect of the present invention, when the role determination means determines that the portable device is set as the master, the authority acquisition inquiry means for inquiring the mobile phone whether or not the authority of the master can be acquired ( S160) and a master continuation unit (S190) for continuing the master of the in-vehicle wireless communication device when a reply that the master device delegates the authority is transferred from the portable device in response to the inquiry for acquiring the authority. To do.

According to a fifth aspect of the invention, when the in-vehicle wireless communication device is set as a master, it is set to perform a hands-free call by wireless communication with a portable device.

According to a sixth aspect of the invention, when the in-vehicle wireless communication device is set as a slave, the vehicle door is set to be unlocked or locked by remote control from the portable device. It is characterized by

According to a seventh aspect of the present invention, the computer of the vehicle-mounted wireless communication device supplied with power from the vehicle-mounted battery (B) is provided with the drive start switch (IG) of the vehicle drive unit that is OF.
When it is determined that F is set, slave setting means (S200) for setting the in-vehicle wireless communication device as a slave,
When it is determined that the drive start switch is turned on, a program for causing the vehicle-mounted wireless communication device to function as a master setting unit (S100a, S150, S190) is set.

According to an eighth aspect of the present invention, a vehicle-mounted wireless communication device (10) mounted on a vehicle, supplied with power from a vehicle-mounted battery (B), and wirelessly communicating in a master-slave system, and a master-slave. A mobile phone (20) for performing wireless communication with an in-vehicle wireless communication device according to a method, wherein the in-vehicle wireless communication device includes a drive start switch (I
When G) is OFF, slave setting means (S200) for setting a slave, and when the drive start switch is ON, master setting means (S15) for setting a master.
0, S190) and the in-vehicle wireless communication device is set as the master by the master setting means, the mobile phone unlocks the vehicle door via wireless communication with the in-vehicle wireless communication device. One of the features of the lock is that remote control is possible.

Incidentally, the reference numerals in parentheses of the above-mentioned respective means are examples showing the corresponding relationship with the concrete means described in an embodiment to be described later.

[0022]

1 shows an in-vehicle wireless communication system according to an embodiment of the present invention. FIG. 1 is a block diagram showing a schematic configuration of an in-vehicle wireless communication system. As shown in FIG. 1, the in-vehicle wireless communication system includes an in-vehicle communication device 10 and a mobile phone 20, and the in-vehicle communication device 10 works together with the mobile phone 20 in a hands-free call and unlocks a vehicle door, or It is for locking.

The in-vehicle communication device 10 includes an antenna 30, a high frequency modulation / demodulation circuit 31, a baseband circuit 32, a microcomputer 33, a speaker 34, a microphone 35, and a voice circuit 3.
6, normally open switches 37-40, waveform shaping circuit 41, R
It has an OM 42, a RAM 43, a motor driver circuit 44, and electric motors 45 to 48. The vehicle-mounted communication device 10 receives power from the vehicle-mounted battery B via the ignition switch IG.

The high frequency modulation / demodulation circuit 31 demodulates the down vehicle interior signal received via the antenna 30 and outputs a down vehicle interior demodulation signal, and also modulates the up vehicle interior baseband signal to output the vehicle interior modulation signal to the antenna. Output to 30. In this high frequency modulation / demodulation circuit 31, as a wireless system,
For example, the Bluetooth method is adopted.

The baseband circuit 32 sends out a vehicle interior digital signal to perform baseband processing, and outputs an uphill vehicle interior baseband signal. In this transmission baseband processing, error correction code addition processing, interleaving processing, and the like are performed on the vehicle interior digital signal. In addition, the baseband circuit 3
Reference numeral 2 receives and demodulates the demodulated signal in the passenger compartment and outputs a received baseband signal in the passenger compartment. In this reception baseband processing, the vehicle interior demodulated signal is subjected to error correction processing, deinterleave processing, and the like.

The microcomputer 33 communicates with the mobile phone 20 by transmitting and receiving through the baseband circuit 32, processing for switching the role of master-slave, processing for controlling the door lock, and hands-free communication. For processing. Note that the computer program of the microcomputer 33 is stored in the ROM 42, and various data associated with the above processing is RA
It is stored in M43.

The audio circuit 36 is a D / A conversion circuit, A / D
The conversion circuit is included, and the transmission signal from the microphone 35 is analog-digital converted to output a vehicle interior digital signal, and the vehicle interior reception baseband signal is digital-analog converted to output the reception signal to the speaker 34.

The normally open switches 37-40 are pressed by the user to output switch signals. The normally open switches 37 to 40 are assigned various functions such as making a call and ending a call.

The waveform shaping circuit 41 is a normally open switch 37.
.About.40 and the switch signals of the ignition switch IG are shaped into waveforms and output to the microcomputer 33. The motor driver circuit 44 is controlled by the microcomputer 33 and rotationally drives the electric motors 45 to 48. The electric motors 45 to 48 unlock or lock the lock device of each door.

Next, the circuit configuration of the mobile phone 20 will be described with reference to FIG. As shown in FIG. 2, the mobile phone 20 includes an antenna 50, a high frequency modulation / demodulation circuit 51, a baseband circuit 52, an antenna 53, a high frequency modulation / demodulation circuit 54, a baseband circuit 55, a control circuit 56, an audio circuit 57, a speaker 58, a microphone. 59, key operation unit 60, key detection circuit 6
1, a ROM 62, a RAM 63, and a display unit 64.

The antenna 50 receives a downlink communication signal from the base station using a radio wave as a medium and sends an uplink communication signal to the base station using a radio wave as a medium. This antenna 50
Together with a high frequency modulation / demodulation circuit 51 and a baseband circuit 52 described below constitute a wireless device that performs wireless communication with a base station of a communication carrier of the mobile phone 20.

The high frequency modulation / demodulation circuit 51 demodulates the downlink communication signal and outputs the downlink demodulation signal, and also modulates the transmission baseband signal and outputs the uplink communication signal. In the high frequency modulation / demodulation circuit 51, for example, a W-CDMA system or the like is adopted as a wireless system.

The baseband circuit 52 outputs from the audio circuit 57 via the control circuit 56 and the baseband circuit 55.
From one of the outputs via the control circuit 56, the transmission baseband processing is performed to output a transmission baseband signal.
The baseband circuit 52 also performs reception baseband processing on the downlink demodulated signal of the high frequency modulation / demodulation circuit 51 and outputs a reception baseband signal.

Here, when a call is made using the speaker 58 and the microphone 59 of the mobile phone 20, the output of the voice circuit 57 is subjected to transmission baseband processing at the time of transmission, and the reception baseband processed signal is the voice circuit at the time of reception. Sent to 57. Further, when performing a hands-free call, the output of the baseband circuit 55 is subjected to transmission baseband processing at the time of transmission, and the reception baseband signal is transmitted to the baseband circuit 55 at the time of reception.

The high frequency modulation / demodulation circuit 54 demodulates the up-vehicle interior signal received by the antenna 53 and outputs an up-vehicle interior demodulation signal, and also modulates the vehicle interior baseband signal from the baseband circuit 55 to descend the vehicle. The indoor signal is transmitted from the antenna 53.

The baseband circuit 55 sends the received baseband signal from the baseband circuit 52, performs baseband processing on the received baseband signal, and outputs a vehicle interior baseband signal.
The in-vehicle demodulated signal from the high frequency modulation / demodulation circuit 54 is subjected to reception baseband processing and a reception baseband processed signal is output.

The antenna 53, together with the high frequency modulation / demodulation circuit 54 and the baseband circuit 55, is mounted on the in-vehicle communication device 1.
A low-power radio that performs wireless communication with 0 is configured.

The control circuit 56 is the microcomputer 5
6a is included and communicates with the vehicle-mounted communication device 10 by transmission / reception via the baseband circuit 55, and is a master.
It performs processing for switching the role of the slave, processing for controlling the door lock, and the like. In addition, this control circuit 56
Performs processing for communicating with the base station or the in-vehicle communication device 10 by transmitting and receiving via the baseband circuit 52 or 55 to function as an ordinary telephone or a hands-free telephone.

The computer program of the control circuit 56 is stored in the ROM 62, and various data associated with the above processing is stored in the RAM 63.

The audio circuit 57 is a baseband circuit 52,
One of the reception baseband signals of 55 is digital-analog converted, and the reception signal is output to the speaker 58. Here, when a call is made with the speaker 58 and the microphone 59, the reception baseband signal of the baseband circuit 52 is sent to the audio circuit 57. Further, when a hands-free call is made, the received baseband signal of the baseband circuit 55 is sent to the voice circuit 57.

The key operation section 60 has keys such as "off hook" and "on hook", and outputs an operation signal when pressed for each key. The key detection circuit 61 includes the key operation unit 6
The operation signal from 0 is waveform-shaped and output to the microcomputer 56a.

The operation of this embodiment will be described below with reference to FIGS.

FIG. 3 is a flowchart showing a master-slave switching process of the microcomputer 33 of the vehicle-mounted communication device 10. The microcomputer 33 starts executing the computer program according to the flowchart shown in FIG.

First, step (hereinafter referred to as S) 100
At, it is determined based on the output from the waveform shaping circuit 41 whether or not the ignition switch IG is ON. When the ignition switch IG is ON,
The in-vehicle communication device 10 is set as a master of the master-slave system (S100a), and whether the wireless connection is possible or not is determined by the mobile phone 2.
An inquiry signal is sent to inquire 0 (S110). The inquiry signal includes an identification code.

Next, when a response signal indicating whether or not the wireless connection is possible is received from the mobile phone 20 (S120), it is determined whether or not the wireless connection is permitted based on the response signal (S13).
0). When it is determined that the wireless connection is permitted, it is determined whether the mobile phone 20 is set as a slave based on the reply signal (S140). Since the reply signal includes information indicating the role of the master-slave system (master or slave) set in the mobile phone 20,
Based on this information, it is determined whether the mobile phone 20 is set as a slave.

When it is determined in S140 that the mobile phone 20 is set as a slave, the master setting is continued (S150).

When it is determined in step S140 that the mobile phone 20 is set as the master, an inquiry signal for acquiring master authority is sent to inquire whether the master authority can be acquired from the mobile phone 20. It is sent to the mobile phone 20 (S160). Next, when a reply signal indicating whether or not master authority can be acquired is received from the mobile phone 20 (S170), it is determined based on the reply signal whether or not transfer of master authority is permitted by the mobile phone 20 (S180). .

When it is determined in S180 that the transfer of the master authority is permitted by the mobile phone 20,
The master setting is continued (S190).

When it is determined in S180 that the transfer of the master authority has been denied by the mobile phone 20, the process returns to S160. Further, when it is determined in S100 that the ignition switch IG is OFF, the process proceeds to S200 and the slave is set.

Further, the microcomputer 56a of the mobile phone 20 performs the master-slave switching process according to the flowchart shown in FIG.

First, it is determined whether or not a wireless connection inquiry signal is received from the vehicle-mounted communication device 10 (S300).
When the inquiry signal is received, it is determined whether to permit the wireless connection with the in-vehicle communication device 10 (S310). For example, the identification code included in the inquiry signal is compared with the registration code registered in advance, and when the identification code and the registration code match, wireless connection with the vehicle-mounted communication device 10 is permitted.

When the wireless connection is permitted, a reply signal indicating the permission of the wireless connection is transmitted (S320). The reply signal includes information indicating the role of the master-slave set in the mobile phone 20.

Next, it is determined whether or not an inquiry signal for master authority acquisition has been received from the vehicle-mounted communication device 10 (S).
330). When it is determined that the inquiry signal for acquiring the authority of the master is received, it is determined whether or not the transfer of the authority of the master is permitted (S340). For example, in-vehicle communication device 1
When the data transfer is completed with another wireless device other than 0, the transfer of the authority of the master is permitted, and when the data transfer is not completed, the transfer of the authority of the master is rejected. As a result, the mobile phone 20 can favorably continue data transfer with another wireless device.

In step 340, when the master authority is allowed to be transferred to the vehicle-mounted communication device 10, a reply signal indicating that the master authority is transferred is transmitted (S).
350), and sets this mobile phone 20 as a slave (S
360).

When the master's delegation of authority is denied in S340, a reply signal indicating refusal of the master's delegation is sent (S370), and the master setting is continued (S380).

As described above, the on-vehicle communication device 10 is set to the slave when the ignition switch IG is OFF, while the ignition switch IG is set to O.
When N, the master is set. As a result, the role of the immaster-slave in the in-vehicle communication device 10 can be appropriately switched by turning on / off the ignition switch IG. Thus, the in-vehicle communication device 10
Is set as a slave when the ignition switch IG is OFF, and does not inquire the mobile phone 20 about permission of wireless connection. Therefore, transmission of an inquiry signal can be eliminated, power consumption can be reduced, and the remaining capacity of the battery B is insufficient. That is, the battery exhaustion can be suppressed.

In this embodiment, when the ignition switch IG is turned off, the in-vehicle communication device 10 serves as a slave, the mobile phone 20 serves as a master, and the mobile phone 20 serves as a master.
The door lock signal and the door unlock signal are sent to the vehicle-mounted communication device 10 by the operation of (1) to perform the door lock control. When the ignition switch IG is turned on, the in-vehicle communication device 10 is used as a master and the mobile phone 20
As a slave, you can make hands-free calls.

Door lock control and hands-free communication will be described below.

First, the door lock control will be described.
The microcomputer 56a of the mobile phone 20 in this case
5 shows the remote control process of the in-vehicle communication device 1
6 shows the door lock unlocking process of the microcomputer 33 of No. 0.

Microcomputer 56 of mobile phone 20
As shown in FIG. 5, a first determines whether or not the calling key of the key operation unit 60 is pressed based on the output of the key detection circuit 61 (S400). When it is determined that the calling key of the key operation unit 60 is pressed, the unlock authentication code is sent to the vehicle-mounted communication device 10 (S410).

In S400, if the calling key of the key operation unit 60 has not been pressed, it is determined based on the output of the key detection circuit 61 whether the end key of the key operation unit 60 has been pressed. (S420). When it is determined that the end key of the key operation unit 60 is pressed, the lock authentication code is sent to the vehicle-mounted communication device 10 (S430).

Further, the microcomputer 33 of the vehicle-mounted communication device 10 performs the door lock unlocking process shown in FIG.
This door lock opening / locking process, unlock authentication code,
Alternatively, it is performed when the lock authentication code is received as a down-vehicle signal.

First, it is determined whether or not the identification code included in the down-vehicle signal matches the registration code registered in advance (S500). When it is determined that the authentication code of the down vehicle interior signal matches the registration code, it is determined whether the down vehicle interior signal is the unlock authentication code.

When the down vehicle compartment signal is the unlock authentication code, the motor driver circuit 44 causes the electric motors 45 to 48 to rotate forward, respectively. Therefore,
The lock devices for the driver side door, the passenger side door, the rear right side door, and the rear left side door are unlocked by the forward rotation of the electric motors 45 to 48.

Next, in S510, when the down vehicle compartment signal is the lock authentication code, the motor driver circuit 44 causes the electric motors 45 to 48 to rotate in reverse. Therefore, the lock devices for the driver side door, the passenger side door, the rear right side door, and the rear left side door are locked by the reverse rotation of the electric motors 45 to 48.

The hands-free call processing by the in-vehicle communication device 10 and the mobile phone 20 is divided into an incoming call mode and an outgoing call mode, and each mode will be described below with reference to FIGS. 7 and 8.

(Incoming Call Mode) The microcomputer 56a of the mobile phone 20 performs the hands-free call processing shown in FIG. 7 (a). This hands-free call processing is started when an incoming call signal is received from the base station of the carrier.

First, an incoming call signal in the vehicle compartment is sent to the in-vehicle communication device 10 (S600). The incoming call signal in the vehicle compartment includes incoming call information.

Next, an off-hook signal described later is received from the vehicle-mounted communication device 10 (S610), and the off-hook signal is sent to the base station (S620). When the off-hook signal is sent to the base station, the telephone line connection is established.

When the downlink communication signal from the base station is received, the downlink communication signal is sent to the vehicle-mounted communication device 10 as a downlink vehicle interior signal, and when the uplink vehicle interior signal is received from the vehicle-mounted communication device 10, the uplink vehicle interior signal is received. The vehicle interior signal is sent to the base station as an upstream communication signal (S630).

Next, it is determined whether or not an in-vehicle end signal is received from the vehicle-mounted communication device 10 (S670). The in-vehicle communication end signal is used when the end-of-call operation is performed.
Sent from. Then, when the vehicle interior termination signal is received, the termination signal is sent to the base station.

Further, the microcomputer 33 of the vehicle-mounted communication device 10 performs the hands-free call processing shown in FIG. 7 (b).

First, when an incoming call signal in the vehicle compartment is received from the mobile phone 20 (S700), a signal for ringing a ring tone is output from the speaker 34 to the audio circuit 36 (S71).
0) After that, it is determined whether or not the switch 37 (switch "1") for instructing the start or end of the call has been pressed (S720). When the user presses the switch 37 to start the call, the determination becomes YES,
An off-hook signal is sent to the mobile phone 20 (S73
0). In order to carry out a hands-free call, when a down-vehicle signal is received from the mobile phone 20, the speaker 34 outputs the received voice and the microphone 35 inputs the transmission signal through the voice circuit 36. At times, an up-vehicle interior signal is sent to the mobile phone 20 (S74).
0).

After that, while the switch 37 is not pressed, the processes of S740 and S760 are repeated and the hands-free call continues. Then, when the user presses the switch 37 to end the call, the in-vehicle end call signal is sent to the mobile phone 20 (S770).

(Calling Mode) In this calling mode, the hands-free call processing is performed when a calling operation is performed by the in-vehicle communication device 10.

FIG. 8A shows the hands-free call processing of the vehicle-mounted communication device 10 in this calling mode. Figure 8
In FIG. 7A, the same reference numerals as those in FIG. 7B indicate the same processing. This hands-free call processing is in the power ON state,
To be executed.

First, it is determined whether or not a calling operation is performed by the switches 37 to 40 (S700A). When it is determined that the call operation is performed by the switches 37 to 40, the vehicle interior call signal (including the abbreviated number) is sent to the mobile phone 20 (S700B). After this, similarly to the processing in the incoming call mode, processing for making a hands-free call (S740), call termination determination (S760), and transmission of the vehicle interior termination signal (S770) are performed.

Further, the microcomputer 56a of the mobile phone 20 performs the hands-free call processing shown in FIG. 8 (b). In FIG. 8B, the same reference numerals as those in FIG.
The same processing is shown.

First, when an in-vehicle call signal is received from the in-vehicle communication device 10 (S600A), the call signal is sent to the base station (S620A). Therefore, the call signal is sent to the base station to connect the telephone line. Is started. After that, similar to the process in the incoming call mode, a process for making a hands-free call (S630) and a reception determination of the vehicle interior end signal (S6).
70) is performed.

In implementing the present invention, the in-vehicle communication system 10 may be replaced by an in-vehicle LAN system. The configuration in this case will be described with reference to FIG. FIG. 9 shows a schematic configuration of the in-vehicle LAN system.

As shown in FIG. 9, the in-vehicle LAN system includes an antenna 30, a high frequency modulation / demodulation circuit 31, a base band circuit 32, a control circuit (microcomputer) 33,
Speaker 35, microphone 34, normally open switches 37-4
0, ROM 42, RAM 43, hands-free controller 36A, display device 1001, switch input device 100
2, LAN driver (LAN driver / receiver) 1
003, a car audio 1004, and a door lock controller 1005. In FIG.
The same reference numerals in FIG. 1 indicate the same or equivalent parts.

The control circuit 33 uses the LAN driver 1003.
Is connected to the in-vehicle LAN 1000 through
The AN1000 has a hands-free controller 36A,
A display device 1001 and a car audio 1004 are connected.

The LAN drive unit 1003 has a control unit 33.
The output signal of is amplified by power and output to the in-vehicle LAN 1000. The hands-free controller 36A serves as an A / D converter of the audio circuit 36 shown in FIG.

The display device 1001 has a normally open switch 37.
Together with 40, a touch panel with a touch switch is configured. The car audio 1004 plays a role of a D / A converter of the audio circuit 36 shown in FIG. 1 in addition to the original function of the audio device. The car audio 1004 can output the received voice from the speaker 35.

In the above embodiment, an example in which the ignition switch IG in an engine-driven automobile is adopted as the drive start switch has been described. However, the drive switch is not limited to this, and a start switch for starting an electric motor for driving an electric automobile. May be adopted.

[Brief description of drawings]

FIG. 1 is a diagram showing an electric circuit configuration of an embodiment of an in-vehicle wireless communication system of the present invention.

2 is a block diagram showing a schematic electric circuit configuration of the mobile phone in FIG.

FIG. 3 is a flowchart showing a master-slave switching process of a microcomputer of the vehicle-mounted communication device in FIG.

4 is a flowchart showing a master-slave switching process of the microcomputer of the mobile phone in FIG.

5 is a flow chart showing a remote control process of the microcomputer of the mobile phone in FIG.

6 is a flowchart showing an unlocking process of a microcomputer of the vehicle-mounted communication device in FIG.

7 is a flowchart showing a part of a hands-free call processing of the in-vehicle communication device in FIG. 1 and the microcomputer of the mobile phone in FIG.

8 is a flowchart showing the rest of the hands-free call processing of the in-vehicle communication device of FIG. 1 and the microcomputer of the mobile phone of FIG.

FIG. 9 is a diagram showing a modification of the electric circuit configuration of the in-vehicle communication device of the one embodiment.

FIG. 10 is a time chart for explaining a master-slave system.

[Explanation of symbols]

10 ... In-vehicle communication device, IG ... Ignition switch.

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5K027 AA11 BB01 CC08 DD10 HH03                       HH26                 5K048 BA42 DA05 DC01 DC03 EA11                       EB02 EB14 HA01 HA02                 5K067 BB04 DD27 EE03 EE35 FF38                       HH24

Claims (8)

[Claims] 1. An in-vehicle wireless communication device, which is supplied with power from an in-vehicle battery (B) and wirelessly communicates with a portable device (20) in a master-slave system, wherein a drive start switch (IG) of a vehicle drive device is provided. When it is determined that the vehicle-mounted wireless communication device is OFF, a slave setting unit (S200) that sets the vehicle-mounted wireless communication device as a slave, and when it is determined that the drive start switch is turned ON, the vehicle-mounted wireless communication device is set as a master. And a master setting unit (S100a, S150, S190) for controlling the vehicle-mounted wireless communication device. 2. When the master setting unit sets the master, the portable device is inquired about permission of wireless connection, and when the slave setting unit sets the slave, the inquiry is not made. The vehicle-mounted wireless communication device according to claim 1, wherein: 3. A role determination means (S140) for determining whether or not the mobile device is set as a slave based on a response from the mobile device to the inquiry, and the mobile device is set as a slave. 3. The in-vehicle wireless communication device according to claim 2, further comprising a master continuation unit (S150) that continues the master of the in-vehicle wireless communication device when the role determination unit determines that. 4. When the role determination means determines that the mobile device is set as a master, the authority acquisition inquiry means (S160) for inquiring the mobile phone as to whether or not the authority of the master can be acquired. In response to the inquiry about the acquisition of authority, when the mobile device obtains a response to transfer the authority of the master, the master continuation unit (S19) that continues the master of the in-vehicle wireless communication device.
0) and the in-vehicle wireless communication device according to claim 3. 5. The mobile communication device according to claim 1, wherein when the in-vehicle wireless communication device is set as a master, it is set to perform a hands-free call by wireless communication with the mobile device. The in-vehicle wireless communication device according to one. 6. When the in-vehicle wireless communication device is set as a slave, it is set to unlock or lock the vehicle door by remote control from the portable device. In-vehicle wireless communication device according to any one of Items 1 to 5. 7. The in-vehicle wireless communication device, which is powered by the in-vehicle battery (B), determines to the computer of the in-vehicle wireless communication device that the drive start switch (IG) of the drive device of the vehicle is off, and the in-vehicle wireless communication device is slaved. When it is determined that the slave setting means (S200) to be set to No. 1 and the drive start switch are turned on, the slave setting means (S100a, S150, S190) for causing the in-vehicle wireless communication device to function as a master is set. program. 8. A vehicle-mounted battery (B) mounted on a vehicle
And a mobile phone (20) that performs wireless communication with the on-vehicle wireless communication device according to the master-slave method, and that has a mobile phone (20) that receives power from the on-vehicle wireless communication device according to the master-slave method. The in-vehicle wireless communication device, when the drive start switch (IG) of the drive device of the vehicle is OFF, the slave setting means (S200) for setting the slave, and when the drive start switch is ON, the master wireless communication device A master setting unit (S150, S190) for setting, and when the in-vehicle wireless communication device is set as a master by the master setting unit, the mobile phone wirelessly communicates with the in-vehicle wireless communication device. An in-vehicle wireless communication system, wherein one of unlocking and locking of a vehicle door is set to be remotely controllable via the.