JP2008079187A - Portable communication terminal equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide portable communication terminal equipment for achieving communication quality optimized in both the normal mode and an HAC mode. <P>SOLUTION: In disclosed portable communication terminal equipment configured to change a transmission output power according to an operation mode, when a normal mode is selected, the maximum transmission output power is controlled to the maximum transmission output power value in the normal use status according to a radio part control signal 9 to be output to a radio transmission/reception part 2 by a control part 7 according to the operation of a user through a user interface part 8. When an HAC mode is selected, the maximum transmission output power is controlled to the maximum transmission output power value to such a limit that interference to a hearing aid for an audibly impaired person can satisfy HAC specifications. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable communication terminal device having a function capable of changing a setting to an interference prevention mode for a hearing aid for a hearing impaired person according to a user's selection, and a method for controlling the portable communication terminal device.

When using the mobile communication terminal device, interference may occur with the hearing aid for the hearing impaired person worn by the user based on the radio wave transmitted by the mobile communication terminal device.
In such a case, by changing the radiation state of the radio wave from the mobile communication terminal device according to the user's selection, the mode is switched to a mode in which interference from the mobile communication terminal device to the hearing aid for the hearing impaired person can be prevented. It is desirable to be able to do this, but the conventional portable communication terminal device does not have such a function.

  FIG. 5 shows an example of the configuration of a conventional portable communication terminal device, which includes an antenna 1, a radio transmission / reception unit 2A, an audio / control data modulation / demodulation unit 3, an audio processing unit 4, a microphone 5, A speaker 6, a control unit 7 </ b> A, and a user interface unit 8 </ b> A are roughly configured.

  The antenna 1 transmits a signal using a radio wave based on a transmission high-frequency signal to a base station (not shown), and induces a reception high-frequency signal based on reception of the signal using the radio wave. The radio transmission / reception unit 2 </ b> A generates a transmission high-frequency signal, sends it to the antenna 1, and receives a reception high-frequency signal from the antenna 1. The voice / control data modulation / demodulation unit 3 demodulates the received high-frequency signal received from the wireless transmission / reception unit 2A, outputs the voice data to the voice processing unit 4, outputs the control data to the control unit 7A, and also outputs the voice data to the voice processing unit 4 A carrier wave is modulated by the audio data from the control unit 7A and the control data from the control unit 7A to generate a transmission high-frequency signal and output it to the radio transmission / reception unit 2A.

  The audio processing unit 4 processes the audio signal input from the microphone 5 to generate audio data, outputs the audio data to the audio / control data modulation / demodulation unit 3, and processes the audio data input from the audio / control data modulation / demodulation unit 3 Then, the audio signal is reproduced and supplied to the speaker 6. The microphone 5 converts the user's voice into a voice signal and inputs the voice signal to the voice processing unit 4. The speaker 6 converts the audio signal from the audio processing unit 4 into audio and transmits it to the user. The control unit 7A generates a wireless unit control signal 9A in accordance with user operation information from the user interface unit 8A during a call and controls the wireless transmission / reception unit 2A to transmit a transmission high-frequency signal and a reception high-frequency signal. Control reception. The user interface unit 8A generates various operation information necessary for controlling the mobile communication terminal device according to a user operation, and inputs the operation information to the control unit 7A.

In the conventional mobile communication terminal device, as shown in FIG. 5, the user generally listens to the received voice through the speaker 6, but in addition to this, an earphone, a headphone (including Bluetooth Headphone), etc. It is also possible to listen using.
In addition, the transmission radiated power of the mobile communication terminal apparatus is controlled so as to constantly change based on an instruction from the base station.
Here, the transmission radiation power is a high-frequency power level that defines the high-frequency electric field strength induced at the position of the object by the radio wave transmitted from the mobile communication terminal device.

By the way, when a hearing-impaired person uses a mobile communication terminal device, it is difficult to listen directly to the output sound from the mobile communication terminal device through the speaker 6, so the output sound from the speaker 6 is used to the hearing aid. It is often amplified and listened to.
In such a case, the transmission radio signal radiated from the antenna of the mobile communication terminal device causes interference with the hearing aid used by the hearing impaired person, which makes it difficult to listen to the sound from the hearing aid.

On the other hand, in North America, in order to reduce the interference caused by the transmission radio signal from the portable communication terminal device to the hearing aid for the hearing impaired person, various regulations that limit the performance of the portable communication terminal device, particularly its transmission radiation power. However, it is legalized as a HAC (Hearing Aid Compatibility) standard.
By restricting the maximum value of the transmitted radiation power according to the HAC standard, it is possible to limit the high-frequency electric field strength based on the transmission radio signal from the portable communication terminal device at the position of the hearing aid for the hearing impaired person. It is possible to reduce interference caused by radio signals transmitted from the mobile communication terminal device to the hearing aid for the handicapped.

Conventional mobile communication terminal devices have some problems in reducing interference with hearing aids for the hearing impaired based on the transmission radio signal of the device itself.
That is, since the conventional mobile communication terminal device does not include means for controlling the maximum value of the transmission radiation power, it is included in the power class 4 (maximum transmission radiation power 33 dBm) of the GSM (Global System for Mobile communications) mobile phone (850/900 MHz). ) Etc., the maximum transmission output power is as large as 2 W, so that it is difficult to reduce the interference with the hearing aid for the hearing impaired when optimized to obtain the maximum radiated power in the radio transceiver unit. There was a problem of becoming.
On the other hand, if the maximum transmission radiated power of all terminals of the same model is reduced so as to conform to the HAC standard, the maximum transmission radiated power is required in the normal use state for users who do not require the HAC standard. Under certain usage environments, there is a risk that sufficient call quality cannot be ensured.

On the other hand, in Patent Literature 1, depending on the usage mode of whether the wireless communication device is used as a voice communication terminal or a data communication terminal device, the efficiency is appropriate in each case. By increasing or decreasing the transmission output power, it is possible to save power and reduce signal distortion regardless of the usage pattern of the user, and to maintain a good communication state at all times. A transmission power control apparatus and a transmission power control method thereof are disclosed.
Japanese Patent Laid-Open No. 2001-292067 (FIG. 1, [0020] to [0022])

  Since conventional mobile communication terminal devices do not have means for controlling the transmission radiation power, high output models may not be able to meet the HAC standard, and the maximum transmission radiation power standard so as to conform to the HAC standard. In the case of use environment where large output power is required, there is a problem that sufficient call quality cannot be secured.

  The present invention has been made in view of the above circumstances, and by enabling control of the transmission output power, the normal mode can be used with the maximum transmission radiation power in the normal use state, and the HAC mode. Then, the mobile communication terminal device and the mobile communication terminal device in which the transmission radiation power satisfies the HAC standard, and the radio signal transmitted from the antenna does not hinder hearing of the hearing impaired person by the hearing aid. It aims to provide a control method.

  In order to solve the above-mentioned problem, the invention according to claim 1 relates to a mobile communication terminal device, and is a mobile communication terminal device capable of changing transmission output power in accordance with an operation mode, and the maximum transmission output when normal mode is selected. The power is controlled to the maximum transmission output power value in the normal use state, and when the HAC mode is selected, the maximum transmission output power is controlled to the maximum transmission output power value at which the interference with the hearing aid for the hearing impaired satisfies the HAC standard. It is configured as described above.

  The invention according to claim 2 relates to the portable communication terminal device according to claim 1, wherein the maximum transmission output power in the normal mode is a transmission radiation of 33 dBm or less at a standard value defined by a power class 4 terminal standard. The maximum transmission output power in the HAC mode corresponds to a transmission radiated power of 29 dBm or less as a standard value defined in the power class 5 terminal standard.

  According to a third aspect of the present invention, there is provided the portable communication terminal device according to the first or second aspect, wherein the selection state of the normal mode or the HAC mode is displayed on a mode selection screen. It is a feature.

  According to a fourth aspect of the present invention, there is provided the portable communication terminal device according to the third aspect, wherein selection of one of the modes on the mode selection screen is performed in accordance with a user operation via the user interface unit. It is characterized by being.

  The invention according to claim 5 relates to the mobile communication terminal apparatus according to any one of claims 1 to 4, wherein the mobile communication terminal apparatus stores power class information corresponding to the selection of the normal mode or the HAC mode. The base station is configured to notify the base station and to set a maximum transmission output power limit value corresponding to the power class specified in the radio transmission / reception unit.

  According to a sixth aspect of the present invention, there is provided the portable communication terminal device according to the fifth aspect, wherein the setting of the maximum transmission output power limit value in the wireless transmission / reception unit is controlled according to a user's operation via the user interface unit. The unit is configured to be performed by a wireless unit control signal output to the wireless transmission / reception unit.

  According to a seventh aspect of the present invention, there is provided a method for controlling a mobile communication terminal device. In a mobile communication terminal device capable of changing transmission output power according to an operation mode, when the normal mode is selected, the maximum transmission output power is set to a normal value. It is controlled to the maximum transmission output power value in the use state, and when the HAC mode is selected, the maximum transmission output power is controlled to the maximum transmission output power value at which the interference with the hearing aid for the hearing impaired satisfies the HAC standard. Yes.

  The invention described in claim 8 relates to the control method of the portable communication terminal device according to claim 7, wherein the maximum transmission output power in the normal mode is 33 dBm or less as a standard value defined in the power class 4 terminal standard. The maximum transmission output power in the HAC mode corresponds to a transmission radiation power of 29 dBm or less as a standard value defined in the power class 5 terminal standard. .

  According to a ninth aspect of the present invention, there is provided the method for controlling a portable communication terminal according to the seventh or eighth aspect, wherein the selection state of the normal mode or the HAC mode is displayed on a mode selection screen. .

  According to a tenth aspect of the present invention, there is provided a control method for a portable communication terminal apparatus according to the ninth aspect, wherein the selection of any mode on the mode selection screen corresponds to a user operation via the user interface unit. It is characterized by being performed.

  An eleventh aspect of the invention relates to a method for controlling a portable communication terminal device according to any one of the seventh to tenth aspects, wherein the portable communication terminal device corresponds to a power class corresponding to selection of a normal mode or a HAC mode. Is notified to the base station, and a maximum transmission output power limit value corresponding to the power class specified in the wireless transmission / reception unit is set.

  According to a twelfth aspect of the present invention, there is provided a control method for a portable communication terminal device according to the eleventh aspect, wherein the setting of the maximum transmission output power limit value in the wireless transmission / reception unit is set by a user operation via the user interface unit. In response, the control unit performs a wireless unit control signal output to the wireless transmission / reception unit.

  In the mobile communication terminal device and the mobile communication terminal device control method of the present invention, the transmission output power can be controlled, so that the normal mode is used with the maximum transmission radiation power in the normal use state to improve the communication capability. In addition, in the HAC mode, the transmitted radiated power satisfies the HAC standard, so that the radio signal transmitted from the antenna does not prevent the hearing impaired person from hearing the hearing sound received by the hearing aid. .

  In the mobile communication terminal device that can change the transmission output power according to the operation mode, the maximum transmission output power is controlled to the maximum transmission output power value in the normal use state when the normal mode is selected, and the maximum when the HAC mode is selected. The transmission output power is controlled to a maximum transmission output power value at which the interference with the hearing aid for the hearing impaired satisfies the HAC standard.

  FIG. 1 is a block diagram showing a circuit configuration of a mobile communication terminal device according to an embodiment of the present invention, FIG. 2 is a flowchart showing an operation of the mobile communication terminal device of this embodiment, and FIG. FIG. 4 is a diagram showing a radiation electric field distribution in the HAC mode in the case of the present embodiment.

  As shown in FIG. 1, the mobile communication terminal device of this example includes an antenna 1, a wireless transmission / reception unit 2, an audio / control data modulation / demodulation unit 3, an audio processing unit 4, a microphone 5, a speaker 6, and a control. The unit 7 and the user interface unit 8 are roughly configured. Among these, the functions and operations of the antenna 1, the voice / control data modulation / demodulation unit 3, the voice processing unit 4, the microphone 5, and the speaker 6 are the same as those in the prior art shown in FIG.

  The user interface unit 8 has input / output means that allow the user to make various settings. In addition to the functions of the conventional user interface unit 8A shown in FIG. The mobile communication terminal device has a function that makes it possible to select one of an operation mode between a normal mode corresponding to a normal use state and a HAC mode satisfying the HAC standard. The control unit 7 generates a wireless unit control signal 9 according to user operation information from the user interface unit 8 during a call and controls the wireless transmission / reception unit 2, thereby In addition to processing the received radio signal, the maximum transmission radiation power level of the radio transmission / reception unit 2 is set to the normal mode and the HAC mode according to the selection of the normal mode and the HAC mode in the user interface unit 8. To control. The radio transmission / reception unit 2 operates at the maximum transmission radiated power in the normal use state in the normal mode in response to the radio unit control signal 9, and in the HAC mode, the radio transmission / reception unit 2 has a predetermined reduced maximum transmission radiated power. Works with.

Hereinafter, the operation at the time of switching between the normal mode and the HAC mode in the mobile communication terminal device of this example will be described according to the flowchart shown in FIG.
In FIG. 2, (a) shows the control of switching between the normal mode and the HAC mode, and (b) specifically shows the contents of the mode-specific power class notification processing.

  As shown in FIG. 2 (a), a user setting screen state is set in which the user can make necessary settings on the screen displayed on the mobile communication terminal device (step S11). In this state, the user displays a mode selection screen (not shown) through an operation on the user interface unit 8 (step S12). When either the normal mode or the HAC mode is selected on the mode selection screen, the radio unit control signal 9 corresponding to the mode information selected from the control unit 7 is output to the radio transmission / reception unit 2.

When the selected mode is the HAC mode (step S13), the radio transmission / reception unit 2 changes the maximum transmission output to the setting value of the HAC mode according to the radio unit control signal 9 (step S14), and the base station After performing the power class notification process for each mode (step S16), the mode is changed to the standby mode (step S17).
When the selected mode is not the HAC mode, the radio transmission / reception unit 2 changes the maximum transmission output to the set value of the normal mode according to the radio unit control signal 9 (step S15), and the mode-specific power class for the base station After performing the notification process (step S16), the process transits to the standby mode (step S17).

  Next, as shown in FIG. 2B, mode-specific power class notification processing is executed (step S21). When the HAC mode is selected in the process of FIG. 2 (a), power class 5 is set as the power class value for each mode (step S22), and this information is transmitted to the base station (not shown) via the radio transceiver unit 2. (Step S23) and the radio transmitter / receiver 2 sets the maximum output power limit value of power class 5 (step S24), thereby transmitting radiation of 29 dBm or less, which is a standard value defined in the power class 5 terminal standard. Communication is performed with the base station using electric power.

  If the normal mode is selected in the process of FIG. 2 (a), power class 4 is set as the mode-specific power class value (step S22), and this information is transmitted to the base station via the radio transceiver unit 2. (Step S23), and by setting a maximum transmission output power limit value of power class 4 in the wireless transmission / reception unit 2 (step S24), transmission radiation of 33 dBm or less, which is a standard value determined by the terminal class of power class 4 Communication is performed with the base station using electric power.

The base station grasps the maximum transmission radiated power value that can be output from the mobile station based on the power class information notified from the mobile station (mobile communication terminal device), and determines the timing of the handover performed between the base stations. It is used as one of the parameters.
The maximum transmitted radiated power value defines the limit of the high-frequency electric field strength induced at the position of the object by the portable communication terminal device. In the HAC standard, the high-frequency electric field at the position of the hearing aid for the hearing impaired person is the hearing impaired person. The limit is set so as not to interfere with the hearing function of the hearing aid. The maximum transmission output power limit value of the mobile communication terminal device is set as a limit value of the transmission output power that reaches the specified maximum transmission radiation power value.

The base station operates with the minimum required transmission radiation power value by sequentially reducing the transmission radiation power of the base station and the mobile station, for example, in 2 dBm steps according to the communication state based on the distance between the mobile station and the like. If the communication becomes difficult even with the maximum allowable radiated power value, the mobile station can maintain communication by handing over to another adjacent base station. Control so that you can.
Note that the power class notification procedure for the base station in the GSM mobile phone to which the present invention is applied is defined in the GSM standardization standard and is well known, and thus detailed description thereof will be omitted.

  FIG. 3 shows the radiation electric field distribution in the normal mode in the mobile communication terminal device of this example, and since the maximum transmission radiation power is large, the hearing aid 10 for the hearing impaired person worn by the user. It is shown that the high-frequency electric field strength of the portion is large, and therefore, interference with the hearing aid for the hearing impaired occurs.

  FIG. 4 shows the radiation electric field distribution in the case of the HAC mode in the portable communication terminal device of this example. Since the maximum transmission radiation power is small, it is for the hearing impaired person wearing the user. It is shown that the high-frequency electric field strength of the hearing aid 10 is small, and therefore no interference occurs with the hearing aid for the hearing impaired.

  Thus, in the mobile communication terminal device of this example, the maximum transmission radiated power at the time of transmission can be switched corresponding to the two modes of the normal mode and the HAC mode. Communication can be ensured by performing communication with the transmission radiation power (generally the rated maximum transmission radiation power value), and in the HAC mode, communication is performed with the sufficiently reduced maximum transmission radiation power. Thus, it is possible to reliably prevent interference based on the radiated electric field on the hearing aid for the hearing impaired.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the present invention can be changed even if there is a design change or the like without departing from the gist of the present invention. include. For example, by changing the directivity of the antenna of the mobile communication terminal device between the normal mode and the HAC mode, the reduction rate of the transmission radiation power in the HAC mode with respect to the normal mode can be reduced. The configuration of the mobile communication terminal device can be simplified. Further, the format and function of the mobile communication terminal device can be arbitrarily selected unless specified by the present invention.

  The present invention can be used for any portable communication terminal device having a normal mode and a HAC mode regardless of its type and model.

It is a block diagram which shows the circuit structure of the portable communication terminal device which is one Example of this invention. It is a flowchart which shows operation | movement of the portable communication terminal device of the Example. It is a figure which shows the radiation electric field distribution at the time of normal mode in the portable communication terminal device of the Example. It is a figure which shows the radiation electric field distribution at the time of HAC mode in the portable communication terminal device of the Example. It is a figure which shows the structural example of the conventional portable communication terminal device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Antenna 2 Radio | wireless transmission / reception part 3 Voice / control data modulation / demodulation part 4 Voice processing part 5 Microphone 6 Speaker 7 Control part 8 User interface part 10 Hearing aid for hearing impaired persons

Claims (12)

  A mobile communication terminal device capable of changing the transmission output power according to the operation mode. When the normal mode is selected, the maximum transmission output power is controlled to the maximum transmission output power value in the normal use state, and when the HAC mode is selected. The portable communication terminal device is configured to control the maximum transmission output power to a maximum transmission output power value that limits interference with the hearing aid for the hearing impaired to satisfy the HAC standard.   The maximum transmission output power in the normal mode corresponds to a transmission radiated power of 33 dBm or less as a standard value defined in the power class 4 terminal standard, and the maximum transmission output power in the HAC mode is a power class 5 2. The mobile communication terminal device according to claim 1, wherein the mobile communication terminal device corresponds to a transmission radiated power of 29 dBm or less as a standard value defined in a terminal standard.   The mobile communication terminal device according to claim 1 or 2, wherein a selection state of the normal mode or the HAC mode is displayed on a mode selection screen.   4. The mobile communication terminal device according to claim 3, wherein the selection of any mode on the mode selection screen is performed in response to a user operation via a user interface unit.   The mobile communication terminal device notifies the base station of the power class information corresponding to the selection of the normal mode or the HAC mode, and sets the maximum transmission output power limit value corresponding to the power class specified in the radio transmission / reception unit It is comprised as follows. The portable communication terminal device as described in any one of Claims 1 thru | or 4 characterized by the above-mentioned.   The setting of the maximum transmission output power limit value in the wireless transmission / reception unit is configured to be performed by a wireless unit control signal output to the wireless transmission / reception unit by the control unit in response to a user operation via the user interface unit. The mobile communication terminal apparatus according to claim 5, wherein   In the mobile communication terminal device that can change the transmission output power according to the operation mode, the maximum transmission output power is controlled to the maximum transmission output power value in the normal use state when the normal mode is selected, and the maximum when the HAC mode is selected. A control method for a portable communication terminal device, wherein the transmission output power is controlled to a maximum transmission output power value at which interference with a hearing aid for the hearing impaired satisfies the HAC standard.   The maximum transmission output power in the normal mode corresponds to the transmission radiated power of 33 dBm or less as a standard value defined in the power class 4 terminal standard, and the maximum transmission output power in the HAC mode is the power class 5 terminal. 8. The method of controlling a mobile communication terminal device according to claim 7, wherein the control value corresponds to a transmission radiated power of 29 dBm or less as a standard value determined by a standard.   The method for controlling a mobile communication terminal device according to claim 7 or 8, wherein a selection state of the normal mode or the HAC mode is displayed on a mode selection screen.   The method for controlling a mobile communication terminal device according to claim 9, wherein selection of any mode on the mode selection screen is performed in accordance with a user operation via a user interface unit.   The mobile communication terminal device notifies the base station of the power class information corresponding to the selection of the normal mode or the HAC mode, and sets the maximum transmission output power limit value corresponding to the power class specified in the radio transmission / reception unit The method for controlling a mobile communication terminal device according to any one of claims 7 to 10.   The maximum transmission output power limit value in the wireless transmission / reception unit is set by a wireless unit control signal output from the control unit to the wireless transmission / reception unit in response to a user operation via a user interface unit. The control method of the portable communication terminal device of Claim 11.

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