JPH1198578A - Hand-free telephone device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a contact even in radio communication between a portable telephone set and a hand-free set by transmitting an identifying code from a transmission side and also validating a receiving signal only when the identifying code has been matched at a reception side. SOLUTION: An originating signal is transmitted from the hand-free set 1 to a radio module 3 side in originating a call but, at the same time, an ID code is transmitted from the hand-free set 1 to a radio module 3. The radio module 3 recognizes the ID code which is received together with an originating signal at first and executes the originating signal so as to start a speech when the ID code has been matched with the one which is stored at a module 3 side. Thus, when an operation switch 16 is operated and the call is originated from the hand-free set 1, the ID code intrinsic to the hand-free set 1 is simultaneously transmitted and a call originating operation is executed after recognizing it at the radio module 3 side so that one's own portable telephone set is not used in the hand-free set of another person.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hands-free telephone device used in a vehicle or the like and capable of wirelessly communicating between a portable telephone and a hands-free set, and more particularly to a hands-free telephone device capable of preventing crosstalk.

[0002]

2. Description of the Related Art In recent years, automobile telephones have become extremely popular. In addition to conventional handset telephone systems, hands-free set telephone systems have been developed in order to avoid one-handed driving during the operation of the handset.

[0003] This type of hands-free telephone set is
A microphone for transmission is installed in, for example, a sun visor section, and an ON / OFF switch for transmission and reception is installed in, for example, a steering wheel section.
Since the dedicated speaker or the in-vehicle audio speaker is also used, the driver can talk without releasing the hand from the steering wheel.

[0004] In this case, since the car-dedicated telephone cannot be used once leaving the car, a general-purpose portable telephone is constructed so as to be connectable to the hands-free set telephone apparatus. Has been proposed that can be used as a mobile phone.

[0005] Above all, as shown in FIG. 5, it has been studied to mount the wireless module 3 on the mobile phone 2 and to perform communication between the mobile phone 2 and the hands-free set 1 by FM radio waves or the like. This saves the trouble of attaching and detaching the harness to and from the mobile phone every time the user gets on and off the vehicle.

[0006]

However, when communication between the portable telephone and the hands-free set is performed wirelessly, vehicles equipped with the same type of hands-free telephone device approach each other and enter a mutually effective transmission / reception range. However, the following problem occurs.

First, as shown in FIG. 5, when the car A and the car B approach and the mobile phone 2A of the car A is in a standby state (the mobile phone 2B of the car B is OFF), the hands-free set 1B of the car B When a call is made by operating the operation button 16B of the car B, the transmission signal generated by the hands-free set 1B of the car B becomes the mobile phone 2 of the car A within the effective transmission / reception range.
The call is received by the wireless module 3A of A, and a call is made using the mobile phone 2A of the A car. That is,
There is a problem that one's own mobile phone is used for another person's hands-free set.

When a call is made to the mobile phone 2B of the car B as shown in FIG. 6, the incoming signal is transmitted from the wireless module 3B to the hands-free set 1A, 1B of both A and B within the effective transmission / reception range. When the occupant of the car A presses the on-hook button 16A of his / her hands-free set 1A before the occupant of the car B, the occupant is connected to the hands-free set 1A of the car A. In other words, there is a problem that a call received by oneself is picked up by another person's hands-free set.

Further, as shown in FIG. 7, when a call is made to the mobile phone 2A of the car A and a normal appropriate hands-free call is being made, the off-hook button of the hands-free set 1B of the car B approaching. When the button 16B is pressed, the call termination signal is received by the wireless module 3A of the car A within the effective transmission / reception range, and the mobile phone 2A of the car A during the call is disconnected. In other words, there is a problem that the call is disconnected by another person's hands-free set.

The present invention has been made in view of such problems of the prior art, and provides a hands-free telephone device capable of effectively preventing crosstalk even when wireless communication is performed between a portable telephone and a hands-free set. The purpose is to:

[0011]

In order to achieve the above object, a hands-free telephone device of the present invention comprises a hands-free set having at least an external microphone and an external speaker, and a portable telephone. In a hands-free telephone device in which communication with a free set is performed wirelessly, when transmitting at least one of a signal for calling, receiving a call, and terminating a call, of communication between the mobile phone and the hands-free set. The transmitting side transmits the identification code, and the receiving side validates the received signal only when the identification code matches.

In this hands-free telephone device, when transmitting any one of a signal for making a call, receiving a call, and a call end, the transmitting side transmits an identification code (ID code), and the receiving side transmits the identification code. Since the received signal is valid only when the codes match, even if a signal from another hands-free telephone device is received, this signal is ignored, so that one's own mobile phone is used for another person's hands-free set. It is possible to prevent such a problem that the call received by oneself is taken by another person's hands-free set, or a problem that the call is cut off by another person's hands-free set.

In the hands-free telephone device of the present invention,
Although not particularly limited, it is preferable that the identification code is transmitted simultaneously with the communication. By doing so, the other party can be confirmed each time communication is performed, and when it is desired to confirm, the time required for confirming the other party is reduced, and the time required for making a call, receiving a call, and ending the call is reduced. .

In the hands-free telephone device of the present invention,
Although not particularly limited, a telephone number of a mobile phone can be used as the identification code. In this case, it is more preferable to store the telephone number of the mobile phone to which the wireless module is mounted in the hands-free set and the nonvolatile memory of the wireless module. In this case, even if one of the hands-free set and the wireless module breaks down, it is not necessary to replace both.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a hands-free telephone device of the present invention, FIG. 2 is a front view showing a wireless module according to the present invention, FIG. 3 is a flowchart showing a control procedure of the hands-free telephone device of the present invention. FIG. 4 is a flowchart showing another control procedure of the hands-free telephone device of the present invention.

First, the overall configuration of the hands-free telephone device according to the present embodiment will be described. As shown in FIG.
The hands-free telephone device of the present embodiment transmits a hands-free set 1 mounted on a vehicle, a mobile phone 2 carried by a user, and a voice signal and a data signal between the hands-free set 1 and the mobile phone 2. And a wireless module 3 mounted on the mobile phone 2 for wireless communication.

The hands-free set 1 includes an external microphone 11, an external speaker 12, and a switch / display unit 1.
6 are provided. The external microphone 11 is provided in, for example, a sun visor section, and the external speaker 12 is also used as a dedicated speaker or a speaker for in-vehicle audio. The switch / display unit 16 is provided on, for example, a steering wheel unit.

The external microphone 11 is for inputting a voice of a driver or the like in place of the built-in microphone of the mobile phone 2, and the driver's voice signal input from the external microphone 11 is transmitted via the wireless module 3. The signal is transmitted to the mobile phone 2, subjected to signal processing by a built-in control circuit (not shown) of the mobile phone 2, and then sent as a radio signal from the built-in antenna 21 to the other party.

On the other hand, the external speaker 12 outputs the voice from the other party in place of the built-in speaker of the mobile phone 2. After being subjected to signal processing by the control circuit of the telephone 2, the signal is output from the external speaker 12 to the room via the wireless communication module 3.

In the hands-free telephone device of the present embodiment,
The hands-free set 1 and the mobile phone 2 are between kHz and M
It is connected by a wireless module 3 using a long-wave to short-wave frequency band radio wave on the order of Hz. For this reason, the hands-free set 1 is provided with an antenna 13 for transmitting and receiving to and from the mobile phone 2 and a wireless communication circuit 3b for processing these transmitted and received signals.

That is, as shown in FIG. 1, the voice signal of the driver input from the external microphone 11 in the radio communication circuit 3b is modulated by the voice modulation circuit 141 into a radio signal of β MHz and then transmitted to the transmitter 142. The signal is transmitted from the antenna 13 to the antenna 31 of the wireless module 3 via the transmission / reception switching circuit 131. This series of circuits,
An audio signal transmitting circuit is configured.

On the other hand, the radio signal of α MHz transmitted from the antenna 31 of the radio module 3 is transmitted to the radio communication circuit 3 b
, And sent to the receiver 152 via the transmission / reception switching circuit 131, further demodulated into an audio signal by the audio detection circuit 151, and then output from the external speaker 12 to the room. This series of circuits constitutes an audio signal receiving circuit.

Also, operation signals other than audio signals are transmitted and received by similar radio signals. For example, hands-free set 1
Are connected to various switches and a display panel 16.
When making a call in a hands-free state or when a call is received, the on-hook switch is input. This switch input signal is converted into a β MHz radio signal by the data coding circuit 171 in the wireless communication circuit 3b, and then transmitted from the transmitter 142 to the antenna 31 of the wireless module 3 via the transmission / reception switching circuit 131 and the antenna 13. You. This series of circuits constitutes a control signal transmitting circuit.

On the other hand, a control signal such as an incoming signal is also transmitted from the wireless module 3. The α MHz radio signal transmitted from the antenna 31 is received by the antenna 13 of the wireless communication circuit 3 b and transmitted and received by the transmission / reception switching circuit 131. To the receiver 152 via the data decoding circuit 1
After being demodulated to a control signal at 81, the incoming call display circuit 182
Is output to the display unit 16 via the. This series of circuits constitutes a control signal receiving circuit.

On the other hand, the wireless module 3 for communicating the voice signal and the control signal from the mobile phone 2 and the voice signal and the control signal to the mobile phone 2 has an antenna 31.
In addition, a transmission circuit 33 and a reception circuit 32 are provided.

That is, as shown in FIG. 1, the β-MHz radio wave signal relating to the sound transmitted from the antenna 13 of the wireless communication circuit 3 b of the hands-free set 1 is received by the antenna 31, and transmitted via the transmission / reception switching circuit 311. Receiver 3
21 and demodulated by a voice detection circuit 322.
Further, the frequency is modulated by the audio modulation circuit 332 to the frequency of the mobile phone 2, and transmitted from the antenna 21 of the mobile phone 2 via the transmission / reception switching circuit 311 as a radio wave on the order of GHz. This series of circuits constitutes the audio signal receiving circuit 32.

The β-MHz radio signal relating to the control signal transmitted from the antenna 13 of the wireless communication circuit 3 b of the hands-free set 1 is received by the antenna 31 and transmitted to the receiver 321 via the transmission / reception switching circuit 311. Thereafter, the signal is demodulated by the data decoding circuit 323 and transmitted from the antenna 21 of the mobile phone 2 via the transmission / reception switching circuit 311 as a radio wave on the order of GHz. This series of circuits constitutes a control signal receiving circuit 32.

The voice signal of the other party received by the built-in antenna 21 of the mobile phone 2 is transmitted from the transmission / reception switching circuit 311 to the voice modulation circuit 332, where it is modulated into an α MHz radio signal and then transmitted to the transmitter 331. The hands-free set 1 from the antenna 31 via the transmission / reception switching circuit 311.
Is transmitted to the antenna 13 of the wireless communication circuit 3b on the side. This series of circuits constitutes the audio signal transmission circuit 33.

The control signal received by the antenna 21 of the mobile phone 2 is sent from the transmission / reception switching circuit 311 to the data coding circuit 333, where it is modulated into a radio signal of α MHz and then sent to the transmitter 331. The signal is transmitted from the antenna 31 to the antenna 13 of the wireless communication circuit 3b of the hands-free set 1 via the transmission / reception switching circuit 311.
This series of circuits constitutes a control signal transmission circuit 33.

Note that a conventionally known mobile phone can be used. The mobile phone 2 has a built-in antenna 21, a built-in microphone 22, and a built-in speaker 23, and functions as a normal mobile phone when not set in the hands-free set 1.

The wireless module 3 having the above-described electrical configuration is formed, for example, in the form of an adapter as shown in FIG. 2, and is detachably attached to the input / output port 24 of the portable telephone 2 for audio and control signals. be able to. That is, the adapter-like wireless module 3 includes the main circuits (the antenna 31, the receiving circuit 32, the transmitting circuit 3) shown in FIG.
3) and a battery power source B1.

When the wireless module 3 is configured to be detachable from the portable telephone 2 by making it an adapter, the wireless module 3 can be used as a hands-free system.
It is sufficient to attach it, and it can be removed when it is not needed.

In the hands-free telephone system according to the present embodiment, the user enters the hands-free state simply by putting the portable telephone 2 equipped with the wireless module 3 in a bag or in a breast pocket and receiving a call from the outside. On-hook switch 16 for hands-free set
You can talk just by operating. Therefore, operations such as connector connection are not required, and convenience is remarkably improved.

In particular, in the hands-free telephone device of the present embodiment, the following control is executed when communication between the hands-free set 1 and the wireless module 3 is performed.

First, as shown in FIG. 3, at the time of transmission (S1), the hands-free set 1 and the wireless module 3
Side, the ID code is transmitted from the hands-free set 1 to the wireless module 3 simultaneously with the transmission signal (S2).

The wireless module 3 first checks the ID code received together with the transmission signal (S3). If the ID code matches the ID code stored in the wireless module 3 (S4), the transmission signal is executed. Start a call (S
5). At this time, if the ID codes do not match in step 4, the process returns to step 1 to continue the standby state.

As described above, when a call is transmitted by operating the operation switch 16 from the hands-free set 1, an ID code unique to the hands-free set 1 is transmitted at the same time, and this is confirmed on the wireless module 3 side. , So that the use of one's own mobile phone for another person's hands-free set can be prevented.

On the other hand, at the time of an incoming call (S6), an incoming signal is transmitted from the portable telephone 2 to the hands-free set 1 via the wireless module 3, and the ID is sent from the wireless module 3 to the hands-free set 1 simultaneously with the incoming signal. The code is also transmitted (S7).

In the hands-free set 1, the ID code received together with the incoming signal is first checked (S8).
If the ID code matches the ID code stored in the hands-free set 1 (S9), the incoming signal is received as valid, and a call is started (S10).

As described above, when there is an incoming call to the mobile phone 2, at the same time, a unique ID code is transmitted from the wireless module 3 to the wireless module 3, and the hands-free set 1 confirms this, and then performs an incoming call operation. Is performed, so that a call received by one's mobile phone is taken by another person's hands-free set, in other words, a call received by another person's mobile phone is taken by one's hands-free set Can be prevented.

When a telephone conversation is started as described above, a telephone call end signal is awaited in steps 11 and 14. Step 11 is a case where the call is ended by operating the operation switch 16 of the hands-free set 1.
Step 14 is a case where the call is ended by the operation switch of the mobile phone 2.

That is, when the call end signal is transmitted from the hands-free set 1 to the wireless module 3 in step 11, an ID code is transmitted at the same time (S12).
The wireless module 3 first checks the ID code received together with the call end signal (S13).

If the ID code matches the ID code stored in the wireless module 3 (S17), the process proceeds to step 18 to terminate the call. If the ID code does not match, a call end signal from another hands-free set 1 is sent. Ignore, step 11
Return to and continue the call.

On the other hand, in the case of a call end signal from the mobile phone 2 at step 14, the ID code is transmitted together with the call end signal from the mobile phone 2 to the hands-free set 1 via the wireless module 3 (S15). . In hands-free set 1, the I received with the call end signal
The D code is checked first (S16), and if it matches the ID code stored in the hands-free set 1 (S1).
7), proceed to step 18 to end the call, but if they do not match, ignore it as a call end signal from another hands-free set 1 and return to step 11 to continue the call.

As described above, even when a call end signal is received, the end operation is executed after confirming the received ID code at the same time, so that one's own call may be disconnected by another person's hands-free set. Can be prevented.

In the embodiment shown in FIG. 3, when the hands-free set 1 and the wireless module 3 communicate with each other, their own ID code is transmitted at the same time. However, as shown in FIG. A telephone number may be used.

That is, as shown in the figure, at the time of transmission (S21), a transmission signal is transmitted from the hands-free set 1 to the wireless module 3 side. Request the telephone number of the mobile phone 2 (S22).

The wireless module 3 first transmits the telephone number of its own portable telephone 2 to the hands-free set 1 based on the telephone number request signal received together with the transmission signal (S23).

Upon receiving this signal, the hands-free set 1 checks the telephone number (S24), and if it matches the telephone number stored in the hands-free set 1 (S2).
5) Execute the transmission signal to start a call (S2).
6). At this time, if the telephone numbers do not match in step 25, the process returns to step 1 to continue the standby state.

As described above, when the operation switch 16 is operated from the hands-free set 1 to make a call, the telephone number of the mobile phone 2 receiving the request is requested, and the telephone number transmitted from the wireless module 3 is transmitted. Since the calling operation is performed after confirmation, it is possible to prevent the user's own mobile phone from being used for another person's hands-free set.

On the other hand, at the time of an incoming call (S27), an incoming signal is transmitted from the portable telephone 2 to the hands-free set 1 via the wireless module 3, and when the incoming signal is received, the hands-free set 1 is sent to the wireless module 3. The wireless module 3 requests the telephone number of the mobile phone 2 (S28).
To the hands-free set 1 (S2
9).

In the hands-free set 1, the telephone number is confirmed (S30). If the telephone number matches the telephone number stored in the hands-free set 1 (S31), the incoming signal is received as valid. , Start a call (S
32). If they do not match, the incoming signal is ignored and the standby state is continued.

As described above, when there is an incoming call to the mobile phone 2, the mobile phone 2 requests the mobile phone 2 for the telephone number, confirms the telephone number sent from the wireless module 3, and receives the incoming call. Since the operation is performed, a call received by one's mobile phone is taken by another person's hands-free set, in other words, a call received by another person's cell phone is taken by one's hands-free set Can be prevented.

When the telephone conversation is started as described above, the control waits for a telephone call termination signal in steps 33 and 34. Step 33 is a case where the call is ended by operating the operation switch 16 of the hands-free set 1.
Step 34 is a case where the call is ended by the operation switch of the mobile phone 2.

That is, when the hands-free set 1 transmits a call end signal to the wireless module 3 in step 33, the hands-free set 1
Request the telephone number of the mobile phone 2 to which the user is attached (S35).

The wireless module 3 transmits its own mobile phone number to the hands-free set 1 in accordance with the request signal (S36), and receives the hands-free set 1
First confirms the telephone number (S37).

At this time, if the telephone number matches the telephone number stored in the hands-free set 1 (S38), step 3
9 to end the call, but if they do not match, ignore it as a call end signal from another hands-free set 1,
Return to step 33 to continue the call.

It should be noted that also in the case of the call termination signal from the mobile phone 2 in step 34, the procedure of steps 35 to 39 is performed.

As described above, even when the call end signal is received, the end operation is executed after confirming the telephone number of the portable telephone, so that the call is not cut off by another person's hands-free set. it can.

In addition to these, in the embodiment shown in FIG.
Since the telephone number of the mobile phone 2 to which the wireless module 3 is mounted is used as an identification code, if this is stored in the non-volatile memory of the hands-free set 1 and the wireless module 3, the hands-free set 1 and the wireless module There is also an effect that even if one of the three fails, it is not necessary to replace the entire system.

The embodiments described above are described for facilitating the understanding of the present invention, but are not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

[0062]

As described above, according to the present invention, even if a signal from another hands-free telephone device is received, the signal is ignored, so that one's own portable telephone is used for another person's hands-free set. , A call that is received by another person's hands-free set, or a call that is terminated by another person's hands-free set can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a hands-free telephone device of the present invention.

FIG. 2 is a front view showing a wireless module according to the present invention.

FIG. 3 is a flowchart showing a control procedure of the hands-free telephone device of the present invention.

FIG. 4 is a flowchart showing another control procedure of the hands-free telephone device of the present invention.

FIG. 5 is a diagram for explaining a problem of a conventional hands-free telephone device.

FIG. 6 is a diagram for explaining a problem of a conventional hands-free telephone device.

FIG. 7 is a diagram for explaining a problem of a conventional hands-free telephone device.

[Explanation of symbols]

 Reference Signs List 1 hands-free set 11 external microphone 12 external speaker 2 mobile phone 3 wireless module

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI H04M 1/60 H04B 7/26 S 109S (72) Inventor Mitsutoshi Hashimoto 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic shares In-company (72) Inventor Hiroaki Saito 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic Corporation (72) Inventor Yasuhisa Nakahara 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic Corporation

Claims (3)

[Claims] A hands-free set (1) having at least an external microphone (11) and an external speaker (12); and a mobile phone (2), and communication between the mobile phone and the hands-free set is performed wirelessly. In the hands-free telephone device, when transmitting at least one of a signal for calling, receiving a call, and terminating a call in communication between the mobile phone and the hands-free set, a transmitting side transmits an identification code. And a receiving side that validates the received signal only when the identification codes match with each other. 2. The hands-free telephone device according to claim 1, wherein said identification code is transmitted simultaneously during communication. 3. The hands-free telephone device according to claim 1, wherein the identification code is a telephone number of the portable telephone.