KR20020008229A - A portable communication device having mode conversion function and mode conversion control system - Google Patents

Abstract

PURPOSE: A portable communication instrument having a mode conversion function and a mode conversion control system are provided to previously prevent the displeasure of surrounding people by a call sound by automatically converting a call mode of the portable communication instrument located in a place which is not familiar with a noise into an environment-friendly mode. CONSTITUTION: An external transmitting device(2) generates a mode conversion code for converting a user setting mode of portable communication terminals(5,6) located in a space which is not familiar with a noise into an environment-friendly mode, converts the generated mode conversion code into a mode conversion signal with a special frequency band(low frequency or super high frequency) which is not used in a BTS(Base Transceiver Station), and periodically provides the converted mode conversion signal to a uniform region. The portable communication terminals(5,6) receives the mode conversion signal transmitted from the external transmitting device(2) and automatically converts a current call mode state into a call mode suitable for circumference environment.

Description

Portable communication equipment and mode switching control system having mode switching function {A PORTABLE COMMUNICATION DEVICE HAVING MODE CONVERSION FUNCTION AND MODE CONVERSION CONTROL SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable communication device, and more particularly, to a portable communication device capable of setting a suitable call mode according to a use environment.

From the era of using light or beacons as a means of communication to the use of electricity for communication as it is today, it has developed through various transformations. Since the basic purpose of communication is to mediate various kinds of information generated from social components, the basic conditions of communication are quick and accurate, and economics must be followed for the public to use a lot. In particular, with the development of communication technology, interest in increasing convenience and usefulness of communication devices is increasing, while the basic conditions of communication, such as speed and accuracy, satisfy the needs of the public to some extent.

The broad categories of portable communication devices include pagers and portable cordless phones (eg, cell phones, PCS, etc.). These pagers and portable radiotelephones are configured such that when a subscriber calls a specific counterpart subscriber's dial, the counterpart's portable communication device announces the call through sound or vibration. Thus, the other subscriber knows that he or she is called from such a ring tone or vibration.

However, as these portable communication devices are popularized, call sounds are changing to noise, especially in places where theaters, libraries, classrooms, offices, laboratories, conference rooms, churches, temples, mortuaries, and emergency rooms are not familiar with noise. Pager and cordless phone calls are a source of great discomfort to those around you.

Therefore, in the conventional portable communication device, a device is provided in which a user can manually change the pager or call mode of the portable radiotelephone to the vibration mode or the sound mode according to the usage environment.

However, this manual switching method is inconvenient to check the current call mode status every time the user enters a place that is not familiar with the noise. In particular, when a user accidentally enters a portable communication device in a sound mode in a place unfamiliar with noise, it causes discomfort to people around due to the ringing sound.

Therefore, many efforts and studies have been conducted to solve this problem. One such effort is the pager, the winner of the 1998 Student Science Invention Contest (see JoongAng Ilbo, July 23, 1998). For example, the pager is attached to the body in a standing state) in the vibration mode, and when separated from the body is a pager that changes to the sound mode.

However, this pager has the following problems. That is, first, when placed in a handbag or a bag, when the clothes containing the pager is hung on a hanger, etc., it may be standing even if it is not attached to the body, such as when it is placed in the outer pocket of thick winter clothes.

Second, the sound mode may be natural even when attached to the body. In other words, women who do not need the vibration mode or do not like the vibration in the body may need to allow the sound mode even when attached to the body.

Third, it can be rather inconvenient for a large number of users who want to get an alarm clock effect by placing a pager on the desk.

Another example is the use of radio blocking devices in theaters, churches, libraries and hospitals developed by Israeli startup Netline to make mobile phones useless. However, in this case, there is a risk that the communication of the mobile phone itself is impossible, thereby infringing the communication rights of the user of the wireless communication device.

The present inventors have determined that all conventional problems can be solved if the portable communication device can automatically recognize its calling mode and switch it to a suitable mode according to the use environment. That is, the first aspect of the present invention is to develop a portable communication device that switches to an environment-friendly mode in a place that requires a quiet atmosphere (that is, a place where noise is not desired), and automatically switches to a mode required by a user in a place that does not. Is the purpose.

In addition, the inventors have recognized that both a hardware change and a software change are possible in developing a portable communication device having a mode switching function. However, in view of the current development trend of miniaturization of portable communication devices, software change is more preferable than hardware change.

Accordingly, it is a second object of the present invention to develop a portable communication device which has a function of automatically selecting a suitable call mode according to the use environment and which does not compromise the size and weight.

In addition, the present inventors found that in order for the portable communication device to recognize the use environment, an apparatus for transmitting information about the switching of the call mode from the outside and a portable communication device capable of recognizing the mode switching information should exist.

Accordingly, it is a third object of the present invention to develop a mode switching control system capable of automatically setting a call mode of a portable communication device entering or leaving a place requiring a quiet atmosphere to an environment-friendly mode.

Other objects and advantages of the invention will be described below and will be appreciated by the practice of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the appended claims.

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate the presently preferred embodiments of the invention and, together with the description of the following preferred embodiments, serve to explain the principles of the invention.

1 is a schematic structural diagram of an embodiment of a mode switching control system according to the present invention.

2 is a schematic structural diagram of another embodiment of a mode switching control system according to the present invention.

3 is a block diagram of FIG. 2.

Figure 4 shows a block diagram of a first embodiment of a portable telephone according to the present invention.

Fig. 5 shows a block diagram of a second embodiment of a portable radiotelephone according to the present invention.

FIG. 6 shows a flowchart of an embodiment of a mode switching processing program applied to the portable radiotelephone of FIG.

FIG. 7 shows a flowchart of another embodiment of the mode switching processing program applied to the portable radiotelephone of FIG.

8 shows a block diagram of a first embodiment of a pager according to the present invention.

Figure 9 shows a block diagram of a second embodiment of a pager according to the present invention.

FIG. 10 is a flowchart of an embodiment of a mode switching processing program applied to the pager of FIG. 9.

FIG. 11 is a flowchart of another embodiment of a mode switching processing program applied to the pager of FIG. 9.

Fig. 12 shows a block diagram of a third embodiment of a portable radiotelephone according to the present invention.

Fig. 13 shows a block diagram of a third embodiment of a pager according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: entrance 2, 14: external transmission device

3: first optical sensor 4: second optical sensor

5: handheld cordless phone 6: pager

21, 56, 121, 156: antenna 35, 135: control unit

36, 136: ROM 37, 137: RAM

41, 141: mode switch 43, 143: ringer speaker

45, 145: vibration motor

In order to achieve the above object, the mode switching control system of the present invention includes (1) a special frequency band which is not used in a wireless base station in order to change the sound calling mode of a portable communication terminal in an environment unfamiliar with noise ( An external transmitter for generating a mode switching signal of low frequency or ultra high frequency) and transmitting the same in a predetermined area; (2) A portable communication terminal which receives a mode change signal transmitted from the external transmitting device and automatically switches the current call mode state to a call mode suitable for the surrounding environment.

The portable communication terminal includes: (a) a first antenna for transmitting and receiving a signal of a radio frequency band allocated for mobile communication; (b) a second antenna for receiving a mode switching signal of a special frequency band transmitted from the external transmitter; (c) signal processing means for digital demodulating the mode switching signal received from the second antenna; (d) mode switching means for selecting and setting a current call mode state as an environment-friendly mode when the digital demodulated mode switching signal is input from the signal processing means.

The portable communication terminal may further include means for storing a call mode state preset by the user. In this case, the mode switching means selects and sets the user setting mode if the mode switching signal is not received for a predetermined time while reading the user setting mode from the storage means, and when the mode switching signal is received. Select and set the environment friendly mode.

The external transmitter may be installed near an entrance of a place unfamiliar with noise. In this case, the storing means further stores the number of times of receiving the mode switch signal; The mode switching means reads the number of reception of the mode switching signal stored in the storage means in the state of receiving the mode switching signal, and determines the entrance and exit status, and selects the environment friendly mode. In case of leaving, the user setting mode is selected.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

Like reference numerals in the description of the present invention denotes like parts throughout the drawings.

1 to 3 show a schematic configuration of an embodiment of a mode switching control system according to the present invention.

1 shows a schematic external configuration of an embodiment of a mode switching control system according to the present invention.

FIG. 1 shows an entrance 1 of a place unfamiliar with noise (including a place requiring a quiet atmosphere and a place where noise is reluctant) and portable communication devices 5 and 6 proximate the entrance. Places that are not familiar with noise include libraries, theaters, lecture rooms, offices, laboratories, conference rooms, churches, temples, music listening rooms, art galleries, emergency rooms, and mortuaries. In addition, it is a matter of course that the doorway 1 may exist in plural (for example, a front door and a back door) for each place.

The portable communication devices 5 and 6 include a radio pager, a cellular mobile telephone terminal and a personal communications service (PCS) phone. However, the portable communication device of the present invention is not necessarily limited to those described above, and of course, it affects all portable communication terminals that are easy to carry and ensure mobility.

On the inner upper end of the doorway (1) is provided with an external transmitter (2). The external transmission device 2 is a mode switching signal generating means for generating a signal in a frequency band that can be recognized by the portable communication devices 5 and 6. In the case of Figure 1, the external transmission device 2 is shown an example installed on the inner top of the doorway 1, it can be installed on the outer top or bottom and side of the doorway (1).

The portable communication device 5, 6 includes a portable radiotelephone 5 having the configuration of Figs. 4, 5 and 12, and a pager 6 having the configuration of Figs. 8, 9 and 13.

Accordingly, when the portable communication device 5 or 6 includes a separate antenna for receiving only a mode switching signal as shown in FIGS. 4 and 8, the external transmitter 2 transmits and receives voice and data information. Generates a radio wave of a low frequency band or an ultra high frequency band different from the communication frequency.

In addition, when the portable communication device (5, 6) has only one antenna for communication with the base station as shown in Figs. 5, 9, 12 and 13, the external transmitting device is for receiving communication for each portable communication device There must be a plurality of radio waves capable of generating radio waves corresponding to the frequencies. This is because the reception frequency bands are different depending on the type of cellular phone, PCS phone and pager and the carrier.

Figure 2 shows a schematic external configuration of another embodiment of a mode switching control system according to the present invention.

The system of FIG. 2 is almost identical to the system of FIG. 1 described above. However, in the system of Figure 2 is characterized in that a plurality of light sensors (3, 4) for detecting the entrance and exit state of the target object on the side of the entrance (1).

As shown in FIG. 2, the optical sensors 3 and 4 are preferably provided on the side and bottom of the entrance 1, respectively. The light sensors 3 and 4 consist of a light transmitting part and a light receiving part, and when the object passes through the entrance and exit, light is blocked. As such, when light incident on the light receiving unit is blocked, the light receiving unit applies the detection signal for the object to the controller 13 of FIG. 3. Accordingly, the control unit 13 instructs the external transmitter 14 to generate radio waves.

The optical sensors 3 and 4 are not necessarily attached only to the side and the bottom side as shown in FIG. 2 if they are suitable to detect the object. Therefore, it is also possible to provide each at the diagonal edge point of the entrance 1. That is, of course, the installation position of the optical sensor can be sufficiently changed by the average knowledge of those skilled in the art.

2 illustrates an example of a transmissive optical sensor having a light transmitting portion and a light receiving portion as a means for detecting an object entering and exiting. However, the sensing means is not necessarily limited thereto and may be replaced by a reflective optical sensor or other equivalent means.

In addition, an A / D converter 15 is interposed between the first and second optical sensors 11 and 12 and the controller 13. That is, the analog signals sensed by the first and second optical sensors 3 and 4 are converted into digital signals that can be recognized by the controller 13 through the A / D converter 15.

Accordingly, when the user carrying the portable communication device passes through the doorway of FIG. 2, the first and second optical sensors 3 and 4 operate, so that the external transmitter 2 on the top of the doorway 1 has a predetermined frequency. It will radiate the radio waves of the band. At this time, the controller 13 drives the external transmitter 2 even if any one of the first and second optical sensors 3 and 4 is operated. In other words, the first and second optical sensors 3 and 4 will not necessarily be operated simultaneously.

In addition, the external transmission device 2 may be installed inside and outside the entrance 1, respectively, so that the portable communication devices 5 and 6 can grasp the state of entering and leaving the user when switching modes. That is, even if the frequency band of the radio wave generated from the external transmitter 2 installed inside and outside the doorway 1 is different or set to the same frequency, the portable communication device 5, 6 by changing the mode switching code carried on the radio wave. You can let yourself know if you are in or out of the room. Details thereof will be described later.

In addition, the external transmission device 2 of the present invention is not installed near the entrance, but can be installed on the ceiling of a place unfamiliar with noise, and can transmit radio waves over a certain radius. At this time, the external transmitter 2 is preferably installed at the center of the ceiling.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The mode switching control system of the present invention comprises an external transmitting device and a portable communication device. In the following, separate the external transmitter and the portable communication device to look at one by one.

A. External Transmitter

The external transmitting device of the present invention is a device for transmitting a control signal for controlling the portable communication device existing in a place unfamiliar with the noise so as not to cause noise pollution.

In general, noise pollution generated by a portable communication device can be classified into two categories. The first is because the ring tone of the portable communication device is too loud. Second, the voice of a user using a portable communication device is too loud.

In order to solve the first problem, it can be achieved by switching the call mode of the portable communication device from the sound mode to the environment-friendly mode.

However, in order to solve the second problem, only the method of entrusting the ethics or morality of the user or blocking the call itself of the portable communication device exists.

Accordingly, the external transmitter of the present invention transmits a mode change signal for switching the call mode of the portable communication device to the environment-friendly mode in order to solve the above-mentioned first problem. Here, the environmentally friendly mode refers to the low sound mode (sounding a weak sound so as not to cause inconvenience to others, hereinafter abbreviated as a weak sound mode), vibration mode or optical mode (portable communication device at the time of call) Means to shine).

Then, let's look at a specific example of the external transmission device of the present invention for transmitting the mode change signal to solve the above-mentioned first problem.

1. When transmitting radio waves in a frequency band (special frequency band) not used by portable communication equipment

In general, the frequency band used by a portable wireless communication device for communication is set as a standard. Therefore, the external transmitter in this case should generate radio waves of low frequency or ultra high frequency band which are not currently used for wireless communication. Of course, in this case, the corresponding portable wireless communication device must include a separate receiving means for receiving radio waves of the low frequency or ultra high frequency band of the external transmitter.

In addition, in order to distinguish whether the user carrying the portable communication device of the present invention enters or exits a place unfamiliar with the noise, one external transmitting device may be installed at the outside and inside of the entrance. . In this case, the transmission frequency bands of the external transmitter installed inside and outside will have to be different from each other. Alternatively, the transmission frequency bands of the external transmission apparatus installed inside and outside may be set identically and may be distinguished by different codes carried on the transmission signal.

The specific configuration of the external transmission device can be designed to enable those skilled in the mobile communication field to sufficiently achieve the object of the present invention, and thus the description of the accompanying drawings and the detailed description thereof will be omitted.

2. In case of transmitting radio wave of frequency band similar to receiving frequency band of portable communication equipment

In this case, the external transmitter shall transmit a signal in a frequency band similar to that of the portable radio communication equipment. The external transmitter may be provided in plural in order to transmit a mode switching signal to a plurality of portable radio communication devices (cellular mobile phones, pagers, PCS phones, etc.) having different reception frequency bands. Alternatively, one external transmitter may be designed to continuously transmit a mode switching signal for each frequency band at a predetermined cycle.

The specific configuration of the external transmission device can be designed to enable those skilled in the mobile communication field to sufficiently achieve the object of the present invention, and thus the description of the accompanying drawings and the detailed description thereof will be omitted.

3. In case of transmitting the mode change signal having the same frequency as the receiving frequency for communication of portable radio communication equipment.

In this case, the mode transmitter signal transmitted by the external transmitter will vary depending on whether the corresponding portable wireless communication device (particularly in the case of a cellular mobile phone) uses the TDMA method or the CDMA method.

For example, when the cellular mobile phone, which is the target of mode switching, uses the CDMA method, the external transmitter transmits a mode switching signal of the same frequency band as the forward CDMA channel.

In addition, when the cellular mobile phone, which is the target of mode switching, uses the TDMA method, the external transmitter transmits a mode switching signal through control channels.

As a result, the external transmitting device is initially connected to the mobile communication device regardless of the signal processing method of the mode switching mode, the initial access channel that the mobile communication device always checks for synchronization with the base station in the idle mode (idle mode) Transmit the mode change signal through.

A specific embodiment of a portable communication terminal which is combined with the above-described external transmission device to build a mode switching control system that can effectively cope with noise pollution is described below.

B. Portable Communication Devices

The configuration and operation of the portable communication devices 5 and 6 applied to the mode switching control system of the present invention will be described with reference to FIGS. 4 to 13.

Example 1

In this embodiment, the mode switching signal is set as a signal of a special frequency band, and the portable communication terminal is provided with a separate antenna for receiving the signal of this special frequency band. Therefore, by installing a simple external transmission device and a simple hardware change of the portable communication terminal it is possible to lead a new communication culture by blocking the noise pollution due to the ringing sound.

The external transmission device 2 applied to this embodiment is a device for generating radio waves of a low frequency band or an ultra high frequency band that a portable communication device does not normally use for receiving data and voice information.

In addition, the portable communication device of this embodiment is provided with a separate antenna for receiving radio waves of the low frequency band or the ultra high frequency band.

Hereinafter, the configuration and operation of the portable communication device according to the first embodiment of the present invention will be described with reference to FIGS. 4 to 8.

4 shows a schematic block diagram of the cellular mobile telephone of this embodiment.

As shown in FIG. 4, the portable wireless telephone of the present invention includes an antenna 21, a liquid crystal display 22, a key input unit 23, a speaker 24, a microphone 25, a switch (SW) 27, Receiver 28, transmitter 29, voice synthesizer 30, digital modulator 31, signal processor 32, speech codec 33, voice conversion circuit 34, controller 35, ROM (36), a communication processing section composed of a RAM (37), and a mode switching processing section (50) composed of an antenna (56) and a receiving section (52).

The antenna 21 of the communication processing unit transmits and receives voice and data information with a radio base station (not shown) according to the allocated frequency band.

In addition, the antenna 21 outputs the received signal received through the switch 27 to the receiver 28, and transmits the transmitted signal input from the transmitter 29 through the switch 27 to the radio base station.

The antenna 56 of the mode switching processing unit 50 receives a mode switching signal of a low frequency band or an ultra high frequency band from an external transmitter installed on an entrance or a ceiling of a place unfamiliar with noise and outputs it to the receiver 52. .

Here, the "mode switching signal of the low frequency band or the ultra high frequency band" means a signal of a frequency band which is not used for communication by a portable communication device such as a pager, a cellular mobile phone and a PCS phone. Therefore, it is difficult to receive the signal of this frequency band by the antenna 21 attached to the portable radio communication apparatus for signal transmission and reception with the base station.

Hereinafter, the frequency band used by the portable radio communication device for receiving data and voice information from the radio base station is referred to as "general frequency", and the frequency band used by the external transmitter 2 to transmit the mode switching signal is referred to as "general frequency". Special frequency ". In addition, the signal of the general frequency band is defined as the communication signal, the signal of the special frequency band is defined as the mode switching signal.

The switch 27 is switched and controlled by the control unit 35, switches the receiver 28 and the transmitter 29 to the antenna 21, and connects them. Usually, the antenna 21 and the receiver 28 are connected. Then, the antenna 21 and the transmitter 29 are connected at the time of transmission.

The receiver 28 receives the received signal of the reception frequency band set by the speech synthesis apparatus 30 from the antenna 21 through the switch 27 and amplifies the received signal at a predetermined amplification rate. )

In addition, the receiving unit 52 of the mode switching processing unit 50 receives the mode switching signal of the set frequency band at the antenna 56, amplifies the received signal at a predetermined amplification ratio, and then converts the digital signal into a digital signal. It outputs to the control part 35.

The transmitter 29 transmits the signal from the antenna 21 through the switch 27 at the transmission frequency set by the speech synthesis apparatus 30 when the transmission signal is input from the digital demodulation unit 31.

When the oscillation frequency band is instructed by the controller 35, the speech synthesis apparatus 30 sets the frequency band to the receiver 28 and the transmitter 29.

The digital demodulation unit 31 digitally demodulates the digitally modulated received signal input from the receiver 28 to the signal processor 32 and digitally modulates the transmission signal input from the signal processor 32 to transmit the signal. )

The signal processing unit 32 exchanges transmission and reception voice signals between the digital demodulation unit 31 and the speech codec unit 33, and exchanges control signals for communication between the control unit 35 and a predetermined time slot. Simultaneously with the extraction of the actual data of the received digital data, the head portion input from the control unit 35 is added to the digital data generated in the radiotelephone, converted into a predetermined data format, and inserted into a predetermined time slot. Output to (31). The processing method of the signal processor 32 is applied to the TDMA method, and the signal processing method will be different in the case of the CDMA method.

The speech codec unit 33 expands the digital voice data compressed by the APPCM method or the like input from the signal processing unit 32 and outputs the digital voice data to the voice conversion circuit unit 34 and the digital voice data input from the voice conversion circuit unit 34. Is compressed by the ADPCM method or the like and output to the signal processor 32.

The voice conversion circuit unit 34 is composed of an A / D converter, a D / A converter, and the like, and converts the digital voice data input from the speech codec unit 33 into an analog voice signal and outputs it to the speaker 24 and at the same time the microphone. The analog voice signal input at 25 is converted into digital voice data and output to the speech codec unit 33.

The control unit 35 is composed of a CPU or the like, executes the communication control processing or the call mode switching processing in accordance with the communication control processing program or the call mode switching processing program stored in the ROM 36, and controls the operation of each unit. .

In addition, the control unit 35 displays the telephone number input from the key input unit 23 to the liquid crystal display unit 22, and when a mode switching signal of a special frequency band is input from the antenna 56, which will be described later stored in the ROM 36. Changes the call mode according to the call mode switch processing program.

The ROM 36 stores a communication control processing program, a call mode switching processing program, and the like executed by the control unit 35.

The RAM 37 forms a data area for temporarily storing various data necessary for the control section 37 to execute communication control processing and call mode switching processing. In particular, the current call mode state is stored in a specific storage area in the RAM 37.

For example, "11" is stored in the sound mode, "00" in the vibration mode, "01" in the optical mode, and "10" in the faint sound mode. Here, the " optical mode " refers to a call mode state in which a lamp installed on the outer case surface of the portable communication terminal emits light when the portable communication terminal is called by the base station to inform the user of the current call state. In addition, the "weak sound mode" refers to a call mode state in which a feeble ringing tone sounds so as not to cause discomfort to others around when the portable communication terminal is called.

Therefore, when the mode change signal is input to the control unit 35, the control unit 35 checks the current call mode state data stored in the RAM 37, and if the data is " 11 " The mode switching control signal is applied and the current mode state is maintained as it is "00", "01", and "10".

The liquid crystal display unit 22 displays various display data input from the control unit 35.

The mode switching unit 41 selects and drives any one of the ringer speaker 43, the vibration motor 45, and the call lamp according to the mode switching control signal applied from the control unit 35.

The ringer speaker 43 notifies the call state to the user through the ring tone when the incoming call is received, and the vibration motor notifies the call state to the user through the vibration when the incoming call arrives.

Next, the operation of the present embodiment will be described.

When the user enters a place unfamiliar with the noise while holding the portable communication terminal of the present embodiment, the external transmission device 2 installed in the entrance or the ceiling transmits a mode switching signal of a special frequency band.

This mode switching signal is received via the antenna 56 of the portable radio terminal of this embodiment. The mode switching signal received through the antenna 56 is converted into a digital signal through the receiver 52 and then input to the controller 35. At this time, the control unit 35 detects that a mode switching signal other than a communication control signal or a voice signal is input, and executes the following call mode switching processing program stored in the ROM 36.

That is, the controller 35 checks the current call mode state stored in the RAM 37 when the mode change signal is input from the receiver 52. Here, the "current call mode state" means the call mode state at the time when the mode switch signal is input through the receiver 52.

When the current call mode state is the sound mode, a mode change control signal for commanding the switching of the call mode is output to the mode switch unit 41, and in the case of the environment friendly mode (optical mode, weak sound mode, vibration mode), The mode switching control signal for maintaining the current call mode state is output to the mode switching unit 41.

At this time, when the mode switching control signal for commanding the switching of the call mode is input to the mode switching unit 41, the mode switching unit 41 is any of the ringer speaker 43, the vibration motor 45 and the call lamp. Select one to drive.

8 shows a case where the first embodiment of the present invention is applied to a pager.

The pager of this embodiment includes a call processor and an antenna 156 comprising an antenna 121, a receiver 128, a decoder 131, a controller 135, a ROM 136, a RAM 137, and a liquid crystal display 122. ), A receiving unit 152, a control unit 135, a mode switching unit 141, a ringer speaker 143 and a vibration switching unit consisting of a motor 145 for vibration.

The antenna 131 receives the call signal of the general frequency band transmitted from the pager radio base station and outputs the received signal to the receiver 128.

The antenna 156 receives a mode switching signal of a special frequency band transmitted by the external transmitter of FIGS. 1 and 2 and outputs it to the receiver 152.

When the reception unit 128 receives the reception signal of the set reception frequency band by the antenna 131, the reception unit 128 amplifies the reception signal at a predetermined amplification rate, and then digitally demodulates it and outputs it to the decoder unit 131.

When the antenna 156 receives the mode switching signal of the set frequency band, the receiver 152 amplifies the received signal at a predetermined amplification ratio, converts the signal into a digital signal, and outputs the digital signal to the controller 135.

The decoder unit 131 decodes the received signal digitally demodulated by the receiver unit 128, and when it is sent to itself, i.e., coincides with the ID code received by the ROM 136, the coincidence detection signal and then The received message signal is sent to the controller 135.

The ROM 136 stores an ID code, a mode switching processing program, and the like described later.

The RAM 137 forms a data area for temporarily storing various data necessary for the control unit 135 to execute the call control process and the mode switching process. In the RAM 137, the current call mode state is stored. For example, "11" is stored in the sound mode and "00" in the environmental mode. Therefore, when the mode change signal is input to the control unit 135, the control unit 135 applies the mode change control signal to the mode change unit 141 when the current call mode state stored in the RAM 137 is "11". "00" keeps the current mode.

The liquid crystal display 122 displays various display data input from the controller 135.

The mode switching unit 141 selects and drives the ringer speaker 143 or the vibration motor 145 according to the mode switching control signal applied from the control unit 135.

The ringer speaker 143 notifies the call state to the user through a ring tone when the incoming call is received, and the vibration motor 145 notifies the call state to the user through vibration when the incoming call is made.

Next, the operation of the present embodiment will be described.

When a user enters through an entrance in a place unfamiliar with noise while carrying the pager of this embodiment, an external transmitter installed on the upper entrance detects a passing object and transmits a mode switching signal of a special frequency band.

This mode switching signal is received via the antenna 156 of the pager. The mode change signal received through the antenna 156 is converted into a digital signal through the receiver 152 and then input to the controller 135. At this time, the control unit 135 executes the following mode switching processing program stored in the ROM 136.

That is, the controller 135 checks the current call mode state stored in the RAM 137 when the mode change signal is input from the receiver 152. At this time, when the current call mode state is the sound mode, the mode switching control signal for commanding the switching of the call mode is output to the mode switching unit 141, and in the environment-friendly mode, the mode to maintain the current call mode state. The switching control signal is output to the mode switching unit 141.

In response to the mode switching control signal, the mode switching unit 141 selects and drives the ringer speaker 143 or the vibration motor 145.

Therefore, when the user enters a place unfamiliar with the noise while possessing the portable communication device of the present embodiment, the call mode of the portable communication device is automatically switched to the environment-friendly mode to prevent the ringing sound generated when an incoming call occurs. Can be.

The above-described first embodiment can be variously modified by those skilled in the art, and will be described below.

Examples 1-1 (Modification 1)

This modification can be applied to both a portable radiotelephone and a pager. Here, only the case where it is applied to the portable radiotelephone will be described.

In the case of the first embodiment, when the user enters through an entrance of a place unfamiliar with the noise, the call mode is automatically switched to the environment-friendly mode. However, when the user leaves the doorway, the environment is still maintained in the eco-friendly mode, so that the user needs to switch the call mode manually when the user wants the eco-friendly mode.

Therefore, this modified example 1 relates to a portable communication device having a function of returning to a call mode (ie, user setting mode) used before entering a room when a user leaves.

This modification 1 is substantially the same as the structure of Example 1. However, only the information stored in the ROM 36 and the RAM 37 and the control method of the control unit 35 differ from the first embodiment as follows.

The RAM 37 of Modification 1 stores data indicating " previous call mode status " and " number of times of mode switching signal "

Here, the "previous call mode state" refers to the call mode state immediately before the call mode is switched. That is, when the pre-entry mode is the sound mode and the post-entry mode is the environment-friendly mode, the previous call mode state before the departure is the sound mode which is the mode before the entrance. In addition, the previous call mode state at the time of reentry becomes an environment-friendly mode which is a post-entry mode.

In addition, the "number of receptions of the mode switching signal" may be stored through two methods as follows.

In the first case, two bits are allocated to the data relating to the number of times of the mode switching signal (first is "00"), and the number is incremented every time the mode switching is performed. In this case, whenever a mode switch corresponding to a multiple of 4 is performed, a shift occurs and is reset at the same time. For example, in the case where the seventh mode changeover is made, the data on the number of reception of the mode changeover signal stored in the RAM indicates "10".

The second case is a case in which 1 bit is allocated to the data relating to the number of times of the mode switching signal (first is "1"), and the occurrence of a carry is checked each time the mode switching is performed.

In the first and second cases described above, it is easy to find out whether the number of reception of the mode switching signal is even or odd. That is, in the first case, it is easy to find out by converting the stored 2-bit data into a decimal number. In the second case, the occurrence of the rounding number is checked and if the rounding occurs, the odd number is used. If the rounding does not occur, the even number is determined.

In addition, the mode switching processing program stored in the ROM 36 of the first modified example and the control method of the control unit 35 differ from those in the first embodiment as follows.

Next, the operation of this modification will be described.

When the user enters and exits the entrance 1 of a place unfamiliar with noise while carrying the portable cordless telephone 5 of the present modification, the external transmission device 2 installed on the top of the entrance detects a passing object and has a special frequency band. Transmit the mode change signal of.

This mode switching signal is received via the antenna 56 of the portable radiotelephone 5 of this modification. The mode switching signal received through the antenna 56 is converted into a digital signal through the receiver 52 and input to the controller 35. At this time, the control unit 35 executes the following mode switching processing program stored in the ROM 36.

That is, when the mode change signal is input from the receiver 52, the controller 35 checks the current call mode state stored in the RAM 37 and the number of reception of the mode change signal.

At this time, when the number of reception of the mode change signal stored in the RAM 37 is an even number and the current call mode state is the sound mode, the control unit 35 transmits a mode change control signal for commanding the change of the call mode. 41). Further, when the number of reception of the mode change signal stored in the RAM 37 is an even number and the current call mode state is an environment-friendly mode, the control unit 35 sends a mode change control signal to maintain the current call mode state. Output to (41).

On the other hand, in the case where the odd number of times of the mode change signal stored in the RAM 37 is an odd number, the mode change control signal to read the previous call mode state stored in the RAM 37 and switch to the same mode as the previous call mode state. Is output to the mode switching unit 41.

According to the mode switching control signal, the mode switching unit 41 selects the ringer speaker 43 or the vibration motor 45 to set the call mode suitable for the use environment.

For example, when the user first enters a place that is not familiar with noise in the sound mode (environmental mode), the control unit recognizes that the number of times the mode switch signal is received is even and the sound mode (environmentally friendly) is in the current call mode. Mode (environmentally friendly mode). When the user leaves, the control unit recognizes that the number of reception of the mode switching signal is an odd number, and reads the sound mode (environmental mode), which is the state of the previous call mode, and switches the current eco-friendly mode to the sound mode (as it is). ). When the user enters the room again, the control unit recognizes that the number of reception of the mode switching signal is an even number, and switches the sound mode (environmentally friendly mode) in the current call mode to the environmentally friendly mode (maintains it). In this way, the call mode suitable for entering and leaving the room can be switched in a simple way.

Therefore, in the present variation 1, when the user enters a place unfamiliar with the noise, the call mode of the portable communication device is switched to the environment-friendly mode at all times. It has the advantage of going back to affinity mode or sound mode).

Example 1-2 (Modification 2)

This modification can be applied to both a portable radiotelephone and a pager. Here, only the case where it is applied to the portable radiotelephone will be described.

In the case of the first embodiment, when the user enters through an entrance of a place unfamiliar with the noise, the call mode is automatically switched to the environment-friendly mode. However, when the user exits through the doorway, the environment is still maintained in the eco-friendly mode, so that when the user wants the sound mode, the call mode must be manually switched.

Therefore, the second modified example relates to a portable communication device having a function of returning to the call mode (user setting mode) used before entering the room when the user leaves.

The configuration of this modified example 2 is substantially the same as that of the first embodiment, but only the following configurations are different from each other.

In the second modified example, unlike the first modified example, an external transmitter is installed inside and outside the entrance and the outside, and the external transmitter and the inside transmit a mode switching signal having different codes.

For example, the outer external transmitter transmits a signal "000000" in which all six digits are zero, and the inner external transmitter transmits a signal "111111" in which all six digits are one. Therefore, the control unit of the present modification determines whether the mode change signal received last is "000000" or "111111", and reads the current call mode state in case of "111111", and switches to environment-friendly mode in case of sound mode. In case of environmentally friendly mode, the current mode is maintained as it is. In addition, when the finally received mode switching signal is "000000", the control unit reads the previous call mode state and switches the current mode to the previous mode.

Therefore, even in the present variation 2, when the user enters a place unfamiliar with the noise, the call mode of the portable communication device is switched to the environment-friendly mode at all times. Back to the friendly mode or the sound mode).

Example 2

As described above, Embodiments 1 to 1-2 of the present invention show a case in which the portable communication device is provided with a separate antenna for receiving a mode switching signal. However, when a separate antenna for receiving the mode switching signal is provided as described above, the problem of miniaturization or light weight of a portable communication device cannot be efficiently achieved.

Accordingly, the second embodiment is characterized by implementing a portable communication device capable of receiving a mode switching signal and a communication signal through one antenna together, achieving a miniaturization and a light weight, and having a mode switching function.

In particular, the second embodiment is characterized in that the frequency band of the mode switch signal is the same as the reception frequency band of the communication signal to enable simultaneous reception of the communication signal and the mode switching signal through one antenna.

5 and 9 are block diagrams of portable radiotelephones and pagers to which the present embodiment is applied.

First, the configuration of the portable radiotelephone of the present embodiment will be described with reference to FIG.

The portable radiotelephone of the second embodiment is the same as that of the portable radiotelephone of the first embodiment. Therefore, the description of the same components as those of the first embodiment will be omitted.

The control unit 35 is composed of a CPU or the like, executes the communication control processing or the call mode switching processing in accordance with the communication control processing program or the call mode switching processing program stored in the ROM 36, and controls the operation of each unit. . In addition, the control unit 35 stores the telephone number input from the key input unit 23 to the liquid crystal display unit 22, and is stored in the ROM 36 when a mode switching signal of the reception frequency band set from the antenna 21 is input. The call mode switching is executed in accordance with the call mode switching processing program shown in FIG.

The ROM 36 stores a communication control processing program, a call mode switching processing program, a mode switching code, and the like executed by the control unit 35. Here, the call mode switching processing program follows the flowchart of FIG. The mode switching code is an identification code for distinguishing between the mode switching signal and the communication signal transmitted from the external transmitter 2.

For example, the mode switching code is set so that it can be clearly distinguished from the communication ID code commonly used by users.

The RAM 37 forms a data area for temporarily storing various data necessary for the control section 37 to execute communication control processing and call mode switching processing. In the RAM 37, the current call mode state is stored.

Next, the operation of this embodiment will be described with reference to FIG.

First, referring to FIG. 6, when a user enters a place unfamiliar with noise in the state of carrying the portable radiotelephone of the present embodiment, the external transmitter 2 installed on the ceiling of the place receives the reception frequency of the portable radiotelephone. Transmit the mode switching signal to the same frequency band as

This mode switching signal is received via the antenna 51 of the portable radiotelephone of this embodiment. The mode switching signal received through the antenna 51 is digitally demodulated via the receiver 52 and then input to the controller 35.

At this time, the control unit 35 performs the call mode switching processing program of the flowchart shown in FIG.

First, the controller 35 determines whether there is a received signal received through the antenna 21. (Step S1)

When the presence of the received signal is confirmed in step S1, the control unit 35 determines whether the received signal is a communication control signal. That is, it is judged whether or not the received signal matches the communication code stored in the ROM 36. (Step S2)

At this time, if the received signal matches the communication code, the flow advances to step S7 to execute the communication control processing program stored in the ROM 36.

If it is determined in step S2 that the received signal is not a call call signal (ie, the received signal does not match the communication code), the controller 35 checks whether the received signal is a mode switching signal. That is, it is determined whether the received signal received through the antenna 21 matches the mode switching code stored in the ROM 36. (Step S3)

If the received signal and the mode switch code coincide at step S3, the controller 35 reads the current call mode state stored in the RAM 37. (step S4)

At this time, if the current call mode state is the sound mode (step S5), the call mode is switched to the environment friendly mode. (Step S6)

On the other hand, if the current call mode state is the environment-friendly mode (step S5), the mode switching processing is terminated while maintaining the environment-friendly mode.

In the present embodiment, a communication control signal and a mode switching signal of the same frequency are received through one antenna. Therefore, the external transmitter applied to this embodiment should be able to generate radio waves of various frequency bands according to the type of each portable radiotelephone. For example, it should be possible to generate a mode switching signal of frequency bands corresponding to 011 and 017 for cellular mobile phones and 016, 018 and 019 for PCS phones.

In addition, in the present embodiment, since the communication control signal and the mode switching signal are received together through one antenna 21, the controller 35 is currently received through the communication code and the mode switching code built in the ROM 36. Whether the signal to be used is a communication control signal or a mode switching signal is determined.

Therefore, the present embodiment does not need to install a separate antenna for receiving the mode switching signal, so that the manufacturing cost is reduced, and the portable radiotelephone can be miniaturized and lightweight.

9 is a block diagram of a pager applied to the present embodiment, and FIG. 10 is a flowchart of a call mode switching processing program executed in the pager of FIG.

In the case of the pager, the same configuration and operation as in the case of the portable radiotelephone are performed. Therefore, the description of the configuration and operation of the pager according to the present embodiment will be omitted in place of the portable radiotelephone.

Example 2-1 (Modification 1)

This modification can be applied to both a portable radiotelephone and a pager. 5 and 7, only the case where the present modification is applied to the portable radiotelephone will be described. In the case of a pager, it can be understood by referring to FIGS. 9 and 11.

As in the second embodiment, the pager has the same configuration and operation as that of the portable radiotelephone, and thus the description thereof will be omitted.

In the case of Example 2, when the user enters a place unfamiliar with the noise, the call mode is automatically switched to the environment-friendly mode. However, since the environment-friendly mode is still maintained when the user leaves, there is a disadvantage that the user must manually switch to the call mode when the user wants the sound mode.

This modified example 1 relates to a portable communication device having a function of returning to a call mode used before entering a room when a user leaves.

This modification 1 is substantially the same as the structure of Example 2. However, only the information stored in the ROM 36 and the RAM 37 and the control method of the control unit 35 differ from the second embodiment as follows.

In the RAM 37 of Modification 1, in addition to the data stored in the RAM 37 of Embodiment 2, the previous call mode state and the number of reception of the mode switching signal are stored.

Here, the "previous call mode state" refers to the call mode state immediately before the call mode is switched. That is, when the pre-entry mode is the sound mode and the post-entry mode is the environment-friendly mode, the previous call mode state before the departure is the sound mode which is the mode before the entrance. In addition, the call mode state before re-entry is an environment-friendly mode which is a post-entry mode.

In addition, the number of reception of the mode switching signal is stored in the same manner as in the first embodiment.

In addition, the call mode switching processing program stored in the ROM 36 of the first modified example and the control method of the control unit 35 differ from the second embodiment as follows.

Next, the operation of this embodiment will be described with reference to FIG.

First, as shown in FIG. 7, when a user enters a place unfamiliar with noise in the state of carrying the portable radiotelephone of the present embodiment, the external transmitter 2 installed on the ceiling has a reception frequency of the portable radiotelephone. Transmit the mode switching signal of the same frequency band.

This mode switching signal is received via the antenna 51 of the portable radiotelephone of this embodiment. The mode switching signal received through the antenna 51 is digitally demodulated via the receiver 52 and then input to the controller 35.

At this time, the control unit 35 performs the call mode switching processing program shown in FIG.

The controller 35 determines whether there is a received signal received through the antenna 21. (Step S11)

When the presence of the received signal is confirmed in step S11, the controller 35 determines whether the received signal is a communication control signal. That is, it is judged whether or not the received signal matches the communication code stored in the ROM 36. (Step S12)

At this time, if the received signal coincides with the communication code, the flow advances to step S21 to execute the communication control processing program stored in the ROM 36.

If it is determined in step S12 that the received signal is not a communication control signal (that is, the received signal does not match the communication code), the controller 35 checks whether the received signal is a mode switching signal. That is, it is determined whether the received signal received through the antenna 21 matches the mode switching code stored in the ROM 36. (Step S13)

If the received signal and the mode switch code coincide at step S13, the controller 35 reads the number of reception of the mode switch signal stored in the RAM 37 to determine whether it is even or odd. Step S14)

At this time, if the number of reception of the mode switching signal is an even number, the control unit 35 reads the current call mode state stored in the RAM 37. (Step S15)

If the current call mode state read in step S15 is the sound mode (step S16), the call mode is switched to the environment friendly mode. (Step S17)

On the other hand, if the current call mode state is the environment-friendly mode (step S16), the call mode is kept as it is and the mode switching processing is terminated. (Step S18)

If the reception frequency of the mode switching signal is an odd number in step S14, the control unit 35 reads the previous call mode state stored in the RAM 37 (step S19), and switches the current call mode state to the previous mode state. do. (Step S20)

In addition, the present modification is applicable to the case where the external transmission device is installed on the ceiling of a place unfamiliar with noise. In this case, the portable communication device of the user in a place unfamiliar with the noise is in a state of continuously receiving the mode change signal transmitted at regular intervals. Therefore, when the portable communication device is placed in a place unfamiliar with the noise, it is in a state of continuously receiving a mode change signal from an external transmitter, and when leaving the place, the mode change signal can no longer be received. Is placed on.

Accordingly, the controller of the portable communication terminal determines that the portable wireless terminal has left the place unfamiliar with the noise if the mode switching signal is not received continuously for a predetermined time. Switch to original call mode.

Therefore, in the present variation 1, when the user enters a place unfamiliar with the noise, the call mode of the portable communication device is switched to the environment-friendly mode at all times, but when the user leaves, You will return to the actual call mode.

Example 2-2 (Modification 2)

In the second modified example, it can be applied to both a portable radiotelephone and a pager. Here, only the case where it is applied to the portable radiotelephone will be described.

In the case of Example 2, when the user enters a place unfamiliar with the noise, the call mode is automatically switched to the environment-friendly mode. However, when the user leaves the place unfamiliar with the noise, the environment is still maintained in the eco-friendly mode, so if the user wants the sound mode has a disadvantage of manually switching the call mode.

Therefore, this modified example 2 relates to a portable communication device having a function of returning to the call mode used before entering the room when the user leaves.

The configuration of this modification 2 is substantially the same as that of the second embodiment, except that only the following configurations are different from each other.

In the second modified example, unlike the first modified example, an external transmitting device is installed inside and outside the entrance and the outside, and the external transmitting device inside and outside transmits a mode change signal of different codes.

For example, the outer transmitting device transmits a signal "000000" in which all 6 digits are zeros, and the inner transmitting device transmits a signal "111111" in which all 6 digits are 1s. Therefore, the control unit of the present modification determines whether the mode change signal received last is "000000" or "111111", and reads the current call mode state in case of "111111", and switches to environment-friendly mode in case of sound mode. In case of environmentally friendly mode, the current mode is maintained. In addition, when the finally received mode switching signal is "000000", the control unit reads the previous call mode state and switches the current mode to the previous mode.

Therefore, even in the case of the second modified example, when the user enters a place unfamiliar with the noise, the call mode of the portable communication device is switched to the environment-friendly mode, but when leaving, the mode set by the user before entering the room ( Environmental mode or sound mode).

Example 3

As described above, Embodiments 2 to 2-2 of the present invention all show the same frequency bands of the mode switching signal and the communication call signal received by the antenna of the portable communication device. However, in order to transmit the mode switching signal in the same way as the reception frequency band of the communication call signal, a cost burden increases because a separate external transmission device must be provided for each use frequency band of the portable communication device. In other words, in order to be able to switch modes in Korea, external transmitters must be installed for mobile phones of 011 and 017 and PCS phones of 016, 018 and 019, respectively.

Therefore, in the present embodiment, the communication call signal and the mode switching signal are received through one antenna, but the mobile phone, PCS phone, and pager are received in one group (that is, 012, 015 group, 011, 017 group, 016, 018, 019). Group) to determine the frequency band common to each group (i.e., the frequency band of mobile phone or pager) and transmit the mode change signal corresponding to this frequency band. It is characterized by separating.

12 is a block diagram of a portable communication device to which the present embodiment is applied.

The configuration of the portable radiotelephone of this third embodiment is almost the same as that of the portable radiotelephone of the first and second embodiments. Therefore, the description about the same component as Example 1 and Example 2 is abbreviate | omitted.

The antenna 221 transmits and receives a transmission / reception signal including a call signal and a voice signal of a predetermined frequency band between the portable communication device and the radio base station, and receives the received signal received through the first switch 227 from the second switch. At the same time as the output to 251, the transmission signal input from the transmission unit 229 via the first switch 227 is transmitted. In addition, a mode switching signal of a predetermined frequency band transmitted from the external wave generator 2 is received and outputted to the second switch 251 through the first switch 227.

The first switch 227 is switched and controlled by the controller 235, and is connected to the antenna 221 by switching the second switch 251 and the transmitter 229, and usually, the antenna 221 and the second switch. The antenna 221 and the transmitter 229 are connected at the time of transmission.

The second switch 251 is connected to the first receiving unit 231 by switching the signal corresponding to the first reception frequency band set through the voice synthesis device 230 of the received signal input through the first switch 227, The signal corresponding to the second reception frequency band set through the voice synthesis device 230 is switched to the second reception unit 252 and connected.

The first reception frequency refers to a reception frequency band of a communication signal that is set for a portable communication device to receive a call signal and a voice signal from a base station. The second reception frequency refers to a frequency set for the portable communication device to receive a mode switch signal. This second reception frequency represents a frequency shared by the mobile phones 011 and 017 and the PCS phones 016, 018 and 019, respectively.

For example, the second reception frequency may be a common frequency of 011 and 017 that can be received by an antenna of a mobile phone and a common frequency of 016, 018, 019 that can be received by an antenna of a PCS phone. Therefore, the signal of the second reception frequency band can be received even in the case of a general mobile phone or a PCS phone, but is treated as a noise in the general mobile phone or a PCS phone and is blocked. In the case of the pager, the second reception frequency band is set by determining the common frequency of 012 and 015.

Therefore, the external transmitter installed at the entrance of the place unfamiliar with the noise should be able to transmit a mode switching signal corresponding to at least the common frequency band of the pager, the mobile phone, and the PCS phone.

The second switch 251 normally connects the first switch 227 and the first receiver 231 and connects the first switch 227 and the second receiver 252 only when the mode switch signal is received.

When the first receiving unit 231 receives the reception signal of the first reception frequency band set by the speech synthesis apparatus 230 from the antenna 221 through the second switch 251, the first reception unit 231 amplifies the reception signal at a predetermined amplification rate. And output to the digital demodulation unit 232.

The second receiver 252 amplifies the received signal at a predetermined amplification rate when the antenna 221 receives the received signal of the second reception frequency band set by the speech synthesis apparatus 230 through the second switch 251. After that, digital demodulation is output to the control unit 235.

When the transmission signal is input from the digital demodulation unit 232, the transmitter 229 transmits the signal from the antenna 221 through the first switch 227 in the transmission frequency band set by the speech synthesis apparatus 230.

When the oscillation frequency band is instructed by the controller 235, the speech synthesis apparatus 230 sets the frequency bands to the first and second receivers 231 and 252 and the transmitter 29.

The digital demodulation unit 232 digitally demodulates the digitally modulated received signal input from the first receiver 231 and outputs the digitally modulated received signal to the signal processor 233, and digitally modulates a transmission signal input from the signal processor 233. Output to (229).

The signal processing unit 233 exchanges transmission and reception voice signals between the digital modulation and demodulation unit 232 and the speech codec unit 234, and exchanges control signals for communication between the control unit 235 and a predetermined time slot. Simultaneously extracting the actual data of the received digital data and adding the head portion input from the control unit 235 to the digital data created inside the radiotelephone, converts it into a predetermined data format, inserts it into a predetermined time slot, and inserts the digital modulation / demodulation unit. Output to (232).

The speech codec unit 234 expands the digital voice data compressed by the APPCM method or the like input from the signal processing unit 233 and outputs the digital voice data to the voice conversion circuit unit 228 and the digital voice data input from the voice conversion circuit unit 228. Is compressed in the ADPCM method and output to the signal processor 233.

The voice conversion circuit unit 228 is composed of an A / D converter, a D / A converter, and the like. The digital voice data input from the speech codec unit 234 is converted into an analog voice signal and output to the speaker 224. The analog voice signal input at 225 is converted into digital voice data and output to the speech codec unit 234.

The control unit 235 is composed of a CPU and the like, executes the communication control processing or the call mode switching processing in accordance with the communication control processing program or the call mode switching processing program stored in the ROM 236, and controls the operation of each unit. , The display of the telephone number input from the key input unit 223 to the liquid crystal display unit 222 and the call mode described later stored in the ROM 236 when a mode switching signal of the second reception frequency band is input from the second receiver 252. The call processing is switched according to the switching processing program.

The ROM 236 stores a communication control processing program, a call mode switching processing program, and the like executed by the control unit 235.

The RAM 237 forms a data area for temporarily storing various data necessary for the control unit 235 to perform communication control processing and mode switching processing. In the RAM 235, the current call mode state is stored. For example, "11" is stored in the sound mode and "00" in the case of the external transmitter. Therefore, when the mode switching signal is input to the control unit 235, the control unit 235 reads the current call mode state stored in the RAM 237, and if it is "11", the mode switching control signal to the mode switching unit 241. If "00" is applied, the current mode state is maintained.

The liquid crystal display 222 displays various display data input from the controller 235.

The mode switching unit 241 selects and drives the ringer speaker 243 or the vibration motor 245 according to the mode switching control signal applied from the control unit 235.

The ringer speaker 243 notifies the call state to the user through the ringing tone when the incoming call is received, and the vibration motor 245 notifies the call state to the user through the vibration upon incoming call.

Next, the operation of the present embodiment will be described.

When the user enters and exits the entrance 1 of a place unfamiliar with noise while carrying the portable radio telephone of the present embodiment, the external transmission device 2 installed at the top of the entrance 1 detects a passing object and performs portable communication. Transmit the mode change signal corresponding to the common frequency band (second reception frequency band) of the equipment.

This mode switching signal is received via the antenna 221 of the portable radiotelephone of this embodiment. The mode switching signal of the second reception frequency band received through the antenna 221 is separated from the communication call signal of the first reception frequency band through the second switch 251, and digitally demodulated via the second reception unit 252. It is entered at 235.

When the mode change signal is input to the control unit 235 through the second receiving unit 252, the control unit 235 reads the current call mode state stored in the RAM 237.

At this time, if the current call mode state is the sound mode, the call mode is switched to the environment friendly mode. On the other hand, if the current call mode state is the environment-friendly mode, the call mode ends the mode switching process while maintaining the environment-friendly mode.

In this embodiment, a communication call signal and a mode switching signal of different frequency bands (similar frequency bands) are received through one antenna. Therefore, the external transmitter applied to this embodiment should be able to generate radio waves in the common frequency band of the portable radiotelephone. For example, a mode switching signal of a frequency band corresponding to a common frequency of 011 and 017 in a mobile phone and a common frequency of 016, 018 and 019 in a PCS phone should be generated.

In addition, in the present embodiment, since the communication call signal and the mode switching signal of different frequency bands are received through one antenna 221, a means for separating the received signals from the inside of the portable communication device is provided. It must be inherent. Therefore, in the present embodiment, a certain circuit change is inevitable inside the existing portable communication device.

Therefore, since the present embodiment does not need to install a separate antenna for receiving the mode switching signal, the manufacturing cost is reduced compared to the first embodiment, and the number of frequency bands to be transmitted by the radio wave generator is reduced compared to the second embodiment. Therefore, the installation cost can be reduced.

13 is a block diagram of a pager applied to the present embodiment.

In the case of the pager, the same configuration and operation as in the case of the portable radiotelephone are performed. Therefore, the description of the configuration and operation of the pager according to the present embodiment will be omitted in place of the portable radiotelephone.

In addition, the present embodiment differs from the first embodiment only in the method of distinguishing the communication call signal and the mode switching signal from the controller, and the process of performing the call mode switching process after the controller recognizes the mode switching signal is the same. .

Therefore, also in the case of the present embodiment, the same modifications as in Example 1-1 and Example 1-2, which is a modification of the first embodiment can be easily created with the average knowledge of those skilled in the art.

Additional advantages and modifications will be readily apparent to those skilled in the art. Thus, in a broad aspect, the invention is not limited to the specific details and representative apparatus shown and described herein.

Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

The present invention is not limited to the above-described embodiments, and various modifications and variations are made by those skilled in the art to which the present invention pertains without departing from the spirit and scope of the appended claims. Of course it is possible.

As described above, since the present invention automatically switches the call mode of all portable communication devices entering and exiting a place unfamiliar with the noise to the environment-friendly mode, it is possible to prevent unpleasant feelings of people around by the call sound.

Claims (12)

(1) Generate a mode switching code for switching the user setting mode of the portable communication terminal to an environment-friendly mode in a place unfamiliar with noise, and use a special frequency band (low frequency or second) that is not used by the base station. An external transmitter for converting the signal into a mode switching signal of high frequency) and transmitting the same periodically within a predetermined area; (2) a portable communication terminal which receives a mode switching signal transmitted from the external transmission device and automatically switches the current call mode state to a call mode suitable for the surrounding environment; The portable communication terminal (a) a first antenna for transmitting and receiving a signal of a radio frequency band allocated for mobile communication; (b) a second antenna for receiving a mode switching signal of a special frequency band transmitted from the external transmitter; (c) signal processing means for digitally demodulating a mode switch signal received from the second antenna to extract a mode switch code; (d) mode switching means for selecting and setting a current call mode state as an environment-friendly mode when a mode switching code is input from the signal processing means. The method of claim 1, And the environment friendly mode is any one selected from vibration mode, light mode and weak sound mode. The method of claim 1, The portable communication terminal Storage means for storing a call mode state set by the user in advance; The mode switching means selects and sets the user setting mode if the mode switching code is not received for a predetermined time while reading the user setting mode from the storage means, and if the mode switching code is received, the environment-friendly mode. Mode switching control system, characterized in that for selecting and setting. The method of claim 1, And the user setting mode is a sound mode or an environment-friendly mode. In a portable communication terminal having a sound mode and an environment-friendly mode as a call mode, (a) a first antenna for transmitting and receiving a signal of a radio frequency band allocated for mobile communication; (b) a second antenna for receiving a mode switching signal of a special frequency band (low frequency or ultra high frequency) not used in a wireless base station from an external transmitter installed in a place unfamiliar with noise; (c) signal processing means for digitally demodulating a mode switch signal received from the second antenna to extract a mode switch code; (d) mode switching means for selecting and setting a current call mode state as an environment-friendly mode when the mode switching code is input from the signal processing means. The method of claim 5, The environmentally friendly mode is a portable communication device, characterized in that any one selected from the vibration mode, light mode and weak sound mode. The method of claim 6, Storage means for storing a call mode state set by the user in advance; The mode switching means selects and sets the user setting mode if the mode switching code is not received in the state of reading the user setting mode from the storage means, and selects an environmentally friendly mode if the mode switching code is received. Portable communication device, characterized in that the setting. The method of claim 7, wherein The user setting mode is a portable communication device, characterized in that the sound mode or environmentally friendly mode. The device is installed in a place unfamiliar with noise and transmits a signal for switching the call mode of the portable communication terminal to the environment-friendly mode. Means for generating a mode switching code for switching the sound calling mode of the portable communication terminal in a place unfamiliar with the noise to an environmentally friendly mode; Means for converting the mode switching code into a mode switching signal of a special frequency (low frequency or ultra high frequency) band not used by a wireless base station; And means for transmitting the mode change signal periodically within a predetermined area. As the device is installed toward the outside of the entrance of a place unfamiliar with noise, and transmits a signal for restoring the call mode of the portable communication terminal to the original user setting mode. Means for generating a mode restoring code for restoring a current call mode of a portable communication terminal exiting from a place unfamiliar with said noise to a user setting mode; Means for converting the mode restoring code into a mode restoring signal in a special frequency band (low frequency or ultra high frequency) not used by a wireless base station; And means for transmitting the mode restore signal periodically within a predetermined area. As the device is installed toward the inside of the entrance of a place unfamiliar with noise, and transmits a mode change signal for switching the call mode of the portable communication terminal to the environment friendly mode. Means for generating a mode switching code for converting a current call mode of a portable communication terminal entering an unfamiliar place into the environment into an environment friendly mode; Means for converting the mode switching code into a mode switching signal of a special frequency (low frequency or ultra high frequency) band not used by a wireless base station; And means for transmitting the mode change signal periodically within a predetermined area. (1) Generate a mode switching code for switching the user setting mode of the portable communication terminal to an environment-friendly mode in a place unfamiliar with noise, and use a special frequency (low frequency or second) that is not used by the wireless base station. An external transmitter for converting the signal into a mode switching signal of a high frequency band and periodically transmitting the signal in a predetermined region; (2) a portable communication terminal which receives a mode switching signal transmitted from the external transmission device and automatically switches the current call mode state to a call mode suitable for the surrounding environment; The portable communication terminal (a) a first antenna for transmitting and receiving a signal in a wireless communication frequency band allocated for mobile communication; (b) a second antenna for receiving a mode switching signal of a special frequency band transmitted from the external transmitter; (c) searching whether a mode switching signal is received through the second antenna when the user setting mode is not an environment-friendly mode, and if the current call mode is selected and set as an environment-friendly mode, the second antenna. Means for stopping the search for the mode switch signal through; And and (d) mode switching means for selecting and setting a current call mode state as an environment-friendly mode when a mode switching signal is received.