JPH06112891A - Portable telephone set, on-vehicle radio equipment and on-vehicle portable telephone set - Google Patents

Abstract

PURPOSE:To improve the operability when a portable telephone set is mounted on a vehicle and to widen the range of stable line setting. CONSTITUTION:A voice signal or a serial data signal from a telephone set section 17 is modulated and sent in air as a weak radio wave from a portable telephone set 10. The weak radio wave is received by an on-vehicle radio equipment 11 being a separate equipment from the portable telephone set 10 and demodulated into a voice signal or a serial data signal, modulated by a radio equipment 11A and sent to a base station. On the other hand, the serial data or the voice signal sent from the base station and received by the radio equipment 11A is once demodulated, and then modulated and radiated in air as a weak radio wave. The weak radio wave is received by the portable telephone set 10, where it is demodulated and sent to a telephone set section 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone, an in-vehicle wireless device and an in-vehicle portable telephone device suitable for use in a vehicle such as an automobile.

[0002]

2. Description of the Related Art In recent years, with the rapid spread of mobile phones, a system in which a mobile phone is mounted on a vehicle such as an automobile has been proposed. FIG. 5 shows such a conventional on-vehicle mobile phone system. This conventional system includes a mobile phone 1, a simple antenna 2 that can be easily installed in a vehicle, and a simple antenna 2.
And an adapter 4 for connecting the battery 3 to the mobile phone 1, a coaxial cable 5 for connecting the antenna 2 and the adapter 4, and a power cable 6 for connecting the battery 3 and the adapter 4. ing.

[0003]

However, in such a conventional in-vehicle mobile phone device, the transmission output of the mobile phone 1 is small and the antenna 2 is easily mounted in the vehicle, so that it is stable. There is a problem that the range where the line can be set is narrow. In addition, since the mobile phone 1 and the adapter 4 are connected by a cable (generally a stretchable cord), it is not bothersome to use the mobile phone 1 during a call and the mobile range of the mobile phone 1 is limited. There are also problems. If the adapter 4 is not used, the mobile phone 1 is directly connected to the antenna 2 via a coaxial cable. However, since the coaxial cable does not have elasticity, the above-mentioned inconvenience in use is caused. More than a cable.

The object of the present invention is to have a wide range in which the line can be set in a stable manner, to avoid the troublesomeness caused by a cable or the like during use during a call, and also to be usable outside the vehicle. An object is to provide a mobile phone, an in-vehicle wireless device, and an in-vehicle mobile phone device.

[0005]

The present invention will be described with reference to FIG. 1, which is an embodiment. The invention of claim 1 is applied to a mobile telephone having a telephone section 17 for wirelessly setting a telephone line and making a call with a base station connected to a public telephone line network. The above-mentioned object is the first weak radio wave transmission / reception means 1 including the antennas 25A and 29A for transmitting and receiving the weak radio wave.
00, a first signal processing means 101 for pre-processing a signal transmitted from the telephone section 17 to be emitted from the first weak electric wave transmitting / receiving means 100, and a weak electric wave received by the first weak electric wave transmitting / receiving means 100. Is carried out by the mobile phone having the second signal processing means 102 for pre-processing for sending to the telephone section 17. Further, the invention of claim 2 has a vehicle-mounted radio 11A for setting a telephone line wirelessly with the base station connected to the public telephone line network via the vehicle-mounted transmission / reception antennas 54 and 55 to make a call. Applies to wireless devices. The above-mentioned object includes antennas 25B and 29B for receiving the weak radio wave emitted from the first weak radio wave transmitting / receiving means 100 of claim 1 and emitting the weak radio wave to the first weak radio wave transmitting / receiving means 100. Second weak electric wave transmitting / receiving means 200 and second weak electric wave transmitting / receiving means 2
The signal received at 00 is pre-processed to be emitted from the transmitting / receiving antennas 54, 55 through the radio 11A, and the radio wave from the base station received at the transmitting / receiving antennas 54, 55 is transmitted to the radio 11A. Received through
This is achieved by an in-vehicle wireless device that includes a fourth signal processing unit 202 that performs preprocessing for emission from the second weak radio wave transmitting / receiving unit 200. According to the invention of claim 3, a mobile phone 10 having a telephone section 17 for wirelessly setting a telephone line with a base station connected to a public telephone line network for making a call.
And an in-vehicle wireless device 11 for wirelessly setting a telephone line with the base station via the in-vehicle transmitting / receiving antennas 54 and 55 to carry out a call. The above-described object is achieved by configuring the mobile phone 10 and the in-vehicle wireless device 11 as in claims 1 and 2, respectively.

[0006]

When the telephone section 17 outputs a voice signal or a serial data signal, which is control information related to telephone operation, the first signal processing means 101 performs processing such as modulation to transmit / receive the first weak radio wave. It is transmitted from the means 100. The transmitted serial data signal or voice signal is received by the second weak electric wave transmitting / receiving means 200 and supplied by the third signal processing means 201, where it is subjected to processing such as demodulation, and then the wireless device 11A. To the base station. On the other hand, when a serial data signal or a voice signal from the other party is transmitted from the base station, it is received by the wireless device 11A via the antennas 54 and 55, and the received signal is supplied to the fourth signal processing means 202. It Then, after the fourth signal processing means 202 performs processing such as modulation, the second weak radio wave transmitting / receiving means 200 transmits the signal. The transmitted serial data signal and voice signal are received by the first weak radio wave transmitting / receiving means 100, demodulated by the second signal processing means 102, and then supplied to the telephone section 17. . Cell phone 10
Since the in-vehicle wireless device 11 and the in-vehicle wireless device 11 are wirelessly connected to each other, the user does not have to worry about the troubles caused by the cable or the like during use.
It can also be used outside the vehicle. Furthermore, the in-vehicle wireless device 1
Since the transmission output of No. 1 can be increased, the range in which the line can be set stably can be expanded.

In the above-mentioned "means for solving the problems" and "actions" for explaining the constitution of the present invention, the reference numerals of the embodiments are used in order to make the present invention easy to understand. It is not limited to the examples.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing the configuration of an in-vehicle mobile phone device according to the present invention. The in-vehicle mobile phone device of this embodiment is roughly divided into a mobile phone 10 and an in-vehicle wireless device 11. The mobile phone 10 and the in-vehicle wireless device 11 are separately provided as shown in FIG. 4, the mobile phone 10 is disposed near the driver's seat, and the in-vehicle wireless device 11 is disposed at the rear part of the vehicle. In FIG. 4, the same parts as those in FIG. 5 described above are designated by the same reference numerals.

In FIG. 1, a mobile phone 10 is configured to have a basic portion 10A having a control portion 12 including a CPU and an extension portion 10B which is a characteristic portion of the present invention. The basic portion 10A has substantially the same configuration as that of the conventional mobile phone, and generally, the ROM in the control unit 12 originally provided in the conventional mobile phone is changed and the expansion portion 10B is provided.
The extension portion 10B can be easily attached by adding a connection terminal or the like for connecting the.

The basic portion 10A has a telephone section 17, which includes a control section 12, a push button dial,
An operation unit 13 including a power switch, a call start button, a call end button, a recall button, and the like, and a speaker 1.
4, a microphone 15, and a display unit 16 including a liquid crystal display for various displays (for example, a telephone number of a calling side) and a light emitting diode for displaying an incoming call. The control unit 12 is composed of a CPU, a ROM, a RAM and the like, and sends out a connection request signal, sends a selection signal (push button dial signal), sends a response signal, receives a call signal and displays an incoming call, and outputs a voice signal. Control. In this case, RO
A program for controlling the CPU is written in M, and the CPU controls various signals in accordance with this program. The RAM is used as a work memory and also used for storing the input telephone number and the like.

The control section 12 also has a function for exchanging voice signals and serial data signals with the extension section 10B. The serial data signal is control information such as the connection request signal, the selection signal, the response signal and the calling signal described above. Here, the serial data is transmitted by the subcarrier transmission method in the voice band.

As shown in FIG. 1, the basic portion 10A has the following elements in addition to the telephone section 17. That is,
A transmitter 18 that modulates a voice signal and a serial data signal and radiates them into the air via an antenna 19, and an antenna 1
A reception unit 20 that demodulates and outputs a voice signal and a serial data signal from a reception signal received via 9, a transmission unit 18, a control unit 21 that controls the reception unit 20, and a transmission / reception unit that switches the antenna 19 during reception during transmission. Switcher (duplexe
r) 22.

The extended portion 10B includes a receiver 24A, a receiver antenna 25A, a voice signal processor 26A, a data modulator / demodulator 27A, a transmitter 28A, and a transmitter antenna 29A.
And a changeover switch 55. Transmitter 28A
The transmission output of is controlled within the range specified by the Radio Law, and wireless communication using weak radio waves is performed. The audio signal processing unit 26A and the data modulation / demodulation unit 27A are both connected to the control unit 12 by signal lines. The changeover switch 55 is turned on when the mobile phone 10 is used as an in-vehicle telephone via the in-vehicle wireless device 11, and is turned off when it is used separately from the in-vehicle wireless device 11. When the changeover switch 55 is on, the control unit 12 prohibits the transmission and reception of signals with the basic portion 10A side, and the extension portion 1
A signal is transmitted to and received from the 0B side, and when the changeover switch 55 is off, transmission and reception of a signal to the extended portion 10B side is prohibited and a signal is transmitted and received to the basic portion 10A side. .

The receiving section 24A converts the high frequency signal received via the antenna 25A into an intermediate frequency signal and supplies it to the audio signal processing section 26A and the data modulation / demodulation section 27A.
The audio signal processing unit 26A demodulates the audio signal from the intermediate frequency signal supplied from the receiving unit 24A, supplies the demodulated audio signal to the control unit 12, and the FM audio signal supplied from the control unit 12.
Modulate and supply to the transmitter 28A. Data modulator / demodulator 27
A demodulates the serial data signal from the intermediate frequency signal sent from the reception unit 24A and supplies it to the control unit 12, and also performs primary modulation of the serial data signal supplied from the control unit 12 and supplies it to the transmission unit 28A. The transmitter 28A is
The modulated serial data signal and voice signal are superimposed on a carrier wave and emitted from the transmitting antenna 29 as weak radio waves into the air.

Although the portable telephone 10 is adapted to obtain power from a built-in battery (not shown), a rechargeable built-in battery is preferable.

FIG. 2 shows the detailed structure of the transmission system of the extension part 10B. As shown in FIG. 2, the transmission system of the audio signal processing unit 26A includes a pre-emphasis 30 that emphasizes high frequency components of an audio signal, a microphone amplifier 31, an IDC (instantaneous frequency shift control) circuit 32, and an audio signal. FM modulator 33 for
a and. Since the voice signal has a very wide dynamic range in its amplitude, a modulation with a significantly large frequency shift may occur, and the IDC circuit 32 prevents the power spectrum of this modulated wave from spreading.

The transmission system of the data modulator / demodulator 27A has an MSK (minimum frequency shift keying) modulator 35 for performing MSK modulation as primary modulation on subcarriers in the voice band of the serial data signal, and frequency modulation as secondary modulation. And an FM modulator 33b that performs Transmission unit 28
A is an oscillator 36 that generates a transmission signal of a predetermined frequency based on the audio signal and the serial data signal that are respectively modulated by the FM modulators 33a and 33b, and an oscillator 38.
And a BPF (bandpass filter) 37 that suppresses a spurious signal in the transmission signal generated by the above.

FIG. 3 shows the detailed structure of the receiving system of the extended portion 10B. As shown in FIG. 3, the reception unit 24A includes a BPF (bandpass filter) 40 for removing spurious signals from the reception signal received by the antenna 25A, and a mixer (mixer) for converting the reception signal into an intermediate frequency signal. 41,
An IF filter 42 for obtaining a predetermined selectivity, and a limiter amplifier 43 for removing an AM (amplitude modulation) component of the intermediate frequency signal. The reception system of the voice modulator / demodulator 26A detects the intermediate frequency signal from the limiter amplifier 43 and demodulates the voice signal, and attenuates the high frequency components of the voice signal demodulated by the FM detector 45a. And a buffer amplifier 47 for amplifying the audio signal output from the de-emphasis 46. The reception system of the data modulation / demodulation unit 27A detects the intermediate frequency signal from the limiter amplifier 43 and demodulates the serial data F.
M detector 45b and MSK at subcarrier frequency
An MSK detector 48 that detects and demodulates a signal, an identification circuit 49, and a clock recovery circuit 50. The identification circuit 49 and the clock reproduction circuit 50 reproduce the serial data signal.

Next, the on-vehicle wireless device 11 will be described with reference to FIG. The in-vehicle wireless device 11 includes a wireless device 11A, a transmission / reception antenna 54, a reception antenna 55, and an extension portion 11B including the same components as the extension portion 10B.
have. Here, instead of the code "A" in the extended portion 10B, the code of the portion common to the extended portion 10B is "
It is replaced with "B".

To the wireless device 11A, the voice signal received by the receiving unit 24B via the receiving antenna 25B and demodulated by the voice signal processing unit 26B is input.
The serial data signal received by the receiver 24B and demodulated by the data modulator / demodulator 27B is input. Then, the wireless device 11a modulates a carrier wave having a frequency used in the mobile phone by the voice signal and the serial data signal, further power-amplifies the carrier wave, and then radiates the carrier wave into the air through the transmitting / receiving antenna 54.

Further, the radio device 11A has a receiving antenna 55.
The audio signal and the serial data signal are demodulated from the high frequency signal received via the and output. The demodulated voice signal is modulated by the voice signal processing unit 26B and then transmitted by the transmitting unit 28.
It is radiated from B to the air through the transmitting antenna 29B.
The demodulated serial data signal is primarily modulated by the data modulation / demodulation unit 27B, secondarily modulated by the transmission unit 28B, and radiated into the air through the transmission antenna 29B. As shown in FIG. 4, the in-vehicle wireless device 11A is connected to the in-vehicle battery 3 via the cable 6, and has a larger transmission output and a wider communication area than the mobile phone 10 powered by the built-in battery.

Next, the operation of the on-vehicle portable telephone device having the above configuration will be described. When the changeover switch 55 is turned on during use, the control unit 12 allows the transmission and reception of signals only with the extension portion 10B. Therefore, the wireless telephone via the antenna 19 is deactivated, and the wireless telephone via the in-vehicle wireless device 11 becomes possible. -At the time of making a call-When an operation for making a call is performed on the operation unit 13, that is, when the call start button is pressed and then the push button dial is pressed to input the telephone number of the other party, the control unit 12 outputs a serial data signal indicating a connection request Is created. The created serial data signal is supplied to the data modulation / demodulation unit 27A, where it is primary-modulated and then supplied to the transmission unit 28A. Then, after being secondarily modulated by the transmitting unit 28A, it is radiated into the air via the transmitting antenna 29A.

The transmission signal radiated into the air is transmitted by the radio 11
The signal is received by the receiving unit 24B via the receiving antenna 25B, converted into an intermediate frequency signal here, and then supplied to the data modulation / demodulation unit 27B. The data modulator / demodulator 27B demodulates the serial data signal and supplies it to the wireless device 11A. The serial data signal supplied to the wireless device 11A is
After being superposed on a carrier wave of a desired frequency, the power is amplified and radiated into the air via the transmitting antenna 54. The radiated serial data signal is received by the base station and then supplied to a switching / control center (not shown). At the exchange / control center, a check is performed using the subscriber management file,
If there is no problem, the call channel is assigned and the switched connection to the public telephone network is performed.

After the switching connection of the public telephone line network is made,
When the caller starts speaking into the microphone 15, a voice signal is output from the microphone 15 and input to the control unit 12. The audio signal is supplied to the audio signal processing unit 26A, where it is amplified and modulated, then superimposed on the carrier wave by the transmitting unit 28A, and then radiated into the air through the antenna 29A.

The transmission signal radiated into the air is transmitted by the radio 11
After being received by the receiving unit 24B via the receiving antenna 25B of the, and converted into an intermediate frequency signal, the audio signal processing unit 26
Supplied to B. The audio signal is demodulated by the audio signal processing unit 26B and supplied to the wireless device 11A. The audio signal supplied to the wireless device 11A is superposed on a carrier wave of a desired frequency, amplified in power, and radiated into the air via the transmission antenna 54. After that, a voice signal is sent from the base station to the other party's telephone through the public telephone line network.

-At the time of incoming call-When a subscriber on the public telephone line side goes off-hook and dials the telephone number of the mobile telephone 10, it is sent to the switching / control center in accordance with the usual switching connection procedure in the public telephone line network. A switched connection is made. Then, a simultaneous call is made from the switching / control center via a plurality of base stations. That is, the serial data signal including the calling signal is transmitted.

When the serial data signal is received by the wireless device 11A via the receiving antenna 55, the received signal is supplied to the data modulation / demodulation unit 27B, subjected to primary and secondary modulation, and then supplied to the transmission unit 28B. It Then, the transmitter 28
It is radiated from B to the air through the transmitting antenna 29B.
The transmission signal radiated into the air is received by the reception unit 24A via the reception antenna 25A of the mobile phone 10, converted into an intermediate frequency signal here, and then supplied to the data modulation / demodulation unit 27A. The data modulator / demodulator 27A demodulates the serial data signal and supplies it to the controller 12.

When the serial data signal is input, the control unit 12 causes the speaker 14 to generate a ringing tone, and then turns on the light emitting diode of the incoming call display on the display unit 16. After that, a serial data signal indicating the response signal is created and supplied to the data modulation / demodulation unit 27A. After that, the connection request signal is sent to the exchange / control center through the same process as that of the connection request signal. Thereby, the line is set and the call is started.

In the configuration of the above embodiment, the receiving section 24A, the receiving antenna 25A, and the transmitting section 2 of the mobile phone 10 described above.
8A and the transmitting antenna 29A include the first weak radio wave transmitting / receiving means 100, and the voice signal processing unit 2 of the mobile phone 10.
6A and the data modulation / demodulation section 27A constitute first and second signal processing means 101 and 102, respectively. Also,
The receiving unit 24B, the receiving antenna 25B, the transmitting unit 28B, and the transmitting antenna 29B of the wireless device 11 are the second weak electric wave transmitting / receiving unit 201, and the voice signal processing unit 26B and the data modulation / demodulating unit 27B of the wireless device 11 are the third and third units. 4 signal processing means 201 and 202, respectively.

In the above embodiment, the audio signal processing section 26
A, control unit 12, data modulation / demodulation unit 27A, and control unit 1
Although the two are connected by signal lines respectively, they may be connected by using a connector. In this case, the basic portion 10A and the extension portion 10B are detachable, and it is easy to deal with a failure or the like. . Further, although the analog modulation / demodulation method is adopted in the above-mentioned embodiment, a digital modulation / demodulation method may be adopted.

[0031]

As described above, according to the present invention, the mobile phone and the in-vehicle wireless device are wirelessly connected, and a line is set between the mobile phone and the base station via the in-vehicle wireless device. Therefore, it is not necessary to connect an antenna to the mobile phone via a cable or the like as in the case of constructing an in-vehicle telephone device using a mobile phone that is commercially available from the past,
The operability at the time of a call is improved, and a call can be made even if the user gets off the vehicle as long as it can communicate with the in-vehicle wireless device. Further, since the transmission output of the on-vehicle wireless device can be made larger than that of the mobile phone, the communication area in which the line can be stably set can be widened. Furthermore, when a mobile phone is mounted on a car, it is not necessary to purchase a new handset for a car phone, so that the price as a whole can be kept lower than before.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an in-vehicle mobile phone device according to the present invention.

FIG. 2 is a block diagram showing a transmission system of the embodiment.

FIG. 3 is a block diagram showing a receiving system of the embodiment.

FIG. 4 is a diagram showing an example of mounting the same embodiment on a vehicle.

FIG. 5 is a diagram showing an example of mounting a conventional on-vehicle mobile phone device in a vehicle.

[Explanation of symbols]

 10 Mobile phone 10A Basic part 10B Extended part 11 In-vehicle radio device 11A Radio device 17 Telephone part 24A Reception part 25A Reception antenna 26A Voice signal processing part 27A Data modulation / demodulation part 28A Transmission part 29A Transmission antenna 100 First weak radio wave transmission / reception means 101 No. 1 signal processing means 102 2nd signal processing means 200 2nd weak radio wave transmitting / receiving means 201 3rd signal processing means 202 4th signal processing means

Claims (3)

[Claims] 1. A mobile phone having a telephone section for wirelessly setting a telephone line and making a call with a base station connected to a public telephone network, the first weak including an antenna for transmitting and receiving a weak radio wave. Radio wave transmitting / receiving means, a first signal processing means for pre-processing a signal transmitted from the telephone section to emit from the first weak radio wave transmitting / receiving means, and a weak signal received by the first weak radio wave transmitting / receiving means. A mobile phone, comprising: second signal processing means for pre-processing to send an electric wave to the telephone section. 2. An in-vehicle wireless device having a wireless device for wirelessly setting a telephone line via a vehicle-mounted transmission / reception antenna to talk with a base station connected to a public telephone line network, Second weak electric wave transmitting / receiving means including an antenna for receiving the weak electric wave emitted from the first weak electric wave transmitting / receiving means and emitting the weak electric wave to the first weak electric wave transmitting / receiving means; Third signal processing means for pre-processing the signal received by the weak radio wave transmitting / receiving means to emit from the transmitting / receiving antenna through the radio, and radio waves from the base station received by the transmitting / receiving antenna via the radio. An in-vehicle wireless device comprising: a fourth signal processing unit that receives and pre-processes to emit from the second weak radio wave transmitting / receiving unit. 3. A mobile phone having a telephone section for wirelessly establishing a telephone line with a base station connected to a public telephone line network and the base station via an in-vehicle transmitting / receiving antenna. An in-vehicle mobile phone device including an in-vehicle wireless device for wirelessly setting a telephone line to carry out a call, wherein the mobile phone includes a first weak electric wave transmission / reception unit including an antenna for transmitting and receiving a weak electric wave, First signal processing means for pre-processing a signal transmitted from the telephone unit to emit from the first weak electric wave transmitting / receiving unit, and weak electric wave received by the first weak electric wave transmitting / receiving unit to the telephone unit. A second signal processing unit that performs preprocessing for transmission, wherein the vehicle-mounted wireless device receives the weak radio wave emitted from the first weak radio wave transmission / reception unit and transmits the first weak radio wave. A second weak electric wave transmitting / receiving means including an antenna for emitting a weak electric wave to the receiving means; and a third processing for preprocessing the signal received by the second weak electric wave transmitting / receiving means to emit from the transmitting / receiving antenna through the radio device. Signal processing means, and fourth signal processing means for receiving radio waves from the base station received by the transmission / reception antenna through the radio device and pre-processing for emission from the second weak radio wave transmission / reception means. An in-vehicle mobile phone device comprising: