KR20060079944A - Method for determining transmission power by regulating specific absorption rate in a mobile communicaion terminal - Google Patents

Abstract

The present invention relates to a transmission power determination method by adjusting the SL in the mobile communication terminal.

The present invention includes the steps of storing a Specific Absorption Rate (SAR) value according to the transmission power strength; Retrieving a transmission power strength corresponding to the requested SL value when a request for adjustment of an SL value is requested while performing a voice call; Determining final transmission power strength according to a pre-stored optimal condition algorithm; And determining whether the determined final transmission power intensity satisfies RF (RF) characteristic protocol and adjusting the gain of the transmission signal according to the final transmission power intensity.

Accordingly, the present invention provides a specific absorption rate (SAR) value, which is the intensity of electromagnetic waves emitted from the terminal within a range desired by the user, during the voice call through the mobile communication terminal. By adjusting and determining the strength of the signal transmitted to the base station accordingly, the strength of the transmitted signal is unnecessarily increased to prevent the increase of the SAR value (SAR), and the electromagnetic wave emitted outside the terminal to the user sensitive to electromagnetic waves. In addition to reducing the damage caused by the effect of providing the optimum call quality.

Description

METHOD FOR DETERMINING TRANSMISSION POWER BY REGULATING SPECIFIC ABSORPTION RATE IN A MOBILE COMMUNICAION TERMINAL}             

1 is a flowchart illustrating an operation of a method for determining a transmission power by controlling an SL in a mobile communication terminal of the present invention.

Figure 2 is a block diagram showing a brief configuration of a mobile communication terminal for implementing the transmission power determination method by the control of the SL in the mobile communication terminal of the present invention.

*** Description of the symbols for the main parts of the drawings ***

10: duplexer 11: low noise amplifier

12: receiver filter 13: SAR database

14: main fisherman 15: automatic gain controller

16 driver amplifier 17 power amplifier

18: liquid crystal display 19: key input unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication terminal, and in particular, a mobile communication terminal (SAR), which is an intensity of electromagnetic waves emitted from a corresponding terminal within a desired range for a voice call to be determined by a user during a voice call By adjusting the value of Specific Absorption Rate and determining the strength of the signal transmitted to the base station, the terminal is prevented from increasing unnecessarily by increasing the strength of the transmitted signal, thereby increasing the SAR value. The present invention relates to a method for determining transmission power by controlling an SL in a mobile communication terminal that reduces damage caused by electromagnetic waves emitted to the outside and provides an optimal call quality.

There is a lot of controversy about the harmfulness of electromagnetic waves generated while using a mobile communication terminal, and research on the harmfulness is ongoing, but some users feel that their ears get hot or slightly dizzy due to long-term voice calls. Direct and indirect harmful effects are caused by.

In particular, the intensity of the electromagnetic wave emitted to the outside of the terminal is proportional to the strength of the transmission signal. When the user uses the mobile communication terminal in a weak electric field where the signal strength of the base station is weakened, the terminal outputs to the base station. According to the algorithm for determining the strength of the transmitted signal, the strength of the transmitted signal is determined and the power is radiated to the maximum value. Therefore, even with a short time call according to the user's age, health, sensitivity to electromagnetic waves, etc. It may be more appealing for harmful actions.

However, in determining the strength of the transmission signal radiated to the base station according to the algorithm for determining the transmission signal strength in the conventional mobile communication terminal, the transmission signal strength according to the algorithm is uniform in consideration of only various factors generated in the wireless environment. However, the harmful effects of electromagnetic waves felt by the user by the determined transmission signal strength are not considered.

That is, even if electromagnetic waves emitted to the outside of the terminal satisfying the harmfulness standard of the electromagnetic wave are emitted in the environment where a certain level of transmission signal intensity is emitted, the user may react sensitively to the electromagnetic wave. It is necessary to adjust the intensity of electromagnetic waves emitted to the outside of the terminal within the range where voice calls can be made.

Accordingly, the present invention has been proposed to solve the above-described problems, and the intensity of the electromagnetic wave emitted from the terminal within the desired range for the voice call to be determined by the user during the voice call through the mobile communication terminal It is an object of the present invention to provide a method for adjusting a specific Absorption Rate (SAR) value and determining the strength of a signal transmitted to a base station accordingly.

The present invention for achieving the above object comprises the steps of storing a specific Absorption Rate (SAR) value according to the transmission power strength; Retrieving a transmission power strength corresponding to the requested SL value when a request for adjustment of an SL value is requested while performing a voice call; Determining final transmission power strength according to a pre-stored optimal condition algorithm; Determining whether the determined final transmission power intensity satisfies RF (Radio Frequency) characteristic regulation, and adjusting the gain of the transmission signal according to the final transmission power intensity.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flowchart illustrating an operation of a method for determining a transmission power by adjusting an SL in a mobile communication terminal according to the present invention. As shown in FIG. 1, a specific absorption rate (SAR) value according to a transmission power strength is shown. Storing (S10); Searching for a transmission power strength corresponding to the requested value of the SLA when receiving a request for adjusting the value of the SAL while performing a voice call (S11 to S13); Determining final transmission power strength according to a pre-stored optimal condition algorithm (S14); Checking whether the determined final transmission power intensity satisfies RF (Radio Frequency) characteristic regulation, and adjusting the gain of the transmission signal according to the final transmission power intensity (S15 to S17).

FIG. 2 is a block diagram showing a simple configuration of a mobile communication terminal for implementing a method for determining a transmission power by controlling an SL in a mobile communication terminal according to the present invention. As shown therein, a specific absorption rate (SAR) database 10 is shown. ), Mobile station modem (MSM) (11), automatic gain controller (12), driver amplifier (13), power amplifier (14), liquid crystal display (15), key input (16), receiver filter (17) ), LNA 18 and duplexer 19.

Through the above-described configuration, the present invention relates to the SAR of the electromagnetic wave emitted from the terminal within a desired range for the voice call to be determined by the user during the voice call through the mobile communication terminal. By determining the transmission signal strength by adjusting the value of Absorption Rate, it is possible to prevent unnecessary increase in the strength of the transmission signal and to increase the SAR value, thereby providing the optimum call quality to users sensitive to electromagnetic waves, The electromagnetic waves emitted to the outside can be reduced.

Here, the SAR (SAR) refers to the numerical value that shows how much the human body absorbs the electromagnetic waves emitted from the mobile communication terminal, by measuring the electromagnetic wave absorption power per unit mass absorbed by the human body when using the mobile communication terminal, Larger values can adversely affect the human body, so countries are restricting the SAR value of the human head from exceeding the standard. Korea's SAR standard is 1.6W, which is the same as the US. / Kg, and Europe and Japan are based on the higher 2.0W / kg.

In addition, the Ministry of Information and Communication recommends that each manufacturer autonomously indicate the SAR value of a mobile communication terminal as interest in a human body is harmful to electromagnetic waves. The meaning of SAR, the effect on the human body, and the number of circumstances are specified.

In the mobile communication terminal implementing the present invention, the duplexer 10 separates and processes the radio signals transmitted and received through the antenna into a transmission signal and a reception signal, and a low noise amplifier (LNA) 11 is the duplexer ( 10) low-noise amplification of the wireless signal received through, and the receiver filter 12 band-passes only the desired band of the radio signal amplified by the low-noise amplifier 11, the band to a later IF (Intermediate Frequency) signal Transfer to a device (not shown) that handles conversion, gain control, baseband conversion, and digital signal conversion.

The SAR database 13 stores the SAR value, which is the intensity of the electromagnetic wave emitted from the terminal according to the change of the transmission signal strength during the voice call, and the main controller 14 stores the voice call and data communication. It is responsible for the overall control related to, and using the retrieved signal strength in accordance with the pre-stored optimal condition algorithm after searching the SAR signal (13) corresponding to the SAR value selected by the user in the SAR database (13) After the final transmission signal strength is determined, the respective devices 15 to 17 in charge of the transmission signal processing are controlled accordingly.

Here, the SAR database 13 implements a SAR value measured by an experiment according to the strength of the transmission signal in a table form.

Automatic gain control (AGC) 15 automatically adjusts the gain of the transmission signal according to the final transmission signal strength determined by the main control unit 14, the driver amplifier 16 is the automatic gain control unit 15 According to the gain of the amplified amplification of the transmission signal after the conversion, noise removal, etc. to a predetermined level, the power amplifier 17 amplifies the output of the driver amplifier 16 to a high power through the duplexer 10 and the antenna Output to the wireless network.

The liquid crystal display 18 processes various data and displays the data on the LCD screen, and the key input unit 19 receives various commands and data from the user.

Meanwhile, referring to the operation of the present invention, first, a SAR value according to a transmission power strength is stored in a SAR database 13 in a mobile communication terminal (S10), wherein the SAR database 13 includes a corresponding terminal. The measured values of the SARs emitted to the outside according to the power strength of the transmission signal outputted from the experiment are stored in a table format, and the data stored in the SAR database 13 is stored when the terminal is shipped. The experiment is performed according to the type of the terminal and stored by the manufacturer.

For example, the maximum value of the SAR is 1.6 W / kg, and the corresponding transmit power strength is within the range of '23 dB to 25 dB ', and the maximum value of the SAR is maximum. The transmit power strength is '25 dB '.

Next, the user senses the influence of the electromagnetic wave emitted from his terminal while performing a voice call, and requests the main controller 14 to adjust the SAR value by operating the key input unit 19. If (S11, S12), the main controller 14 requests the SAR database 13 to the transmission power strength search corresponding to the requested SAR (SAR) value (S13).

Here, the user may not only adjust the SAR value by manipulating the key input unit 19 during the voice call, but also move the menu screen before the voice call and set the preset value to a specific value and fix it.

Subsequently, the main controller 14, which reads the transmission power strength corresponding to the SAR from the SAR database 13, uses the transmission power strength to apply to the optimal condition algorithm previously stored in a memory (not shown). The final transmission power strength is determined according to (S14).

In general, the main controller 14 determines the final transmit power strength according to an optimal condition algorithm using variables such as a frequency band, a strength of a received signal (RSSI) sensed from a base station, and power during access and call connection. According to the present invention, the optimal condition algorithm determines a final transmission power strength by adding a transmission power strength corresponding to a user-specified SAR value as a new variable, wherein the final transmission power strength is a user-specified transmission. Output is equal to or less than the power level.

In addition, the main controller 14 checks whether the determined final transmission power intensity satisfies RF (Radio Frequency) characteristic agreement (S15), and when the final transmission power intensity does not satisfy the RF characteristic agreement, The liquid crystal display unit 18 is larger than the predetermined value and rises to a level sufficient to cause interference with other terminals around the device, or it is smaller than the predetermined value so that it has fallen to such a level that a smooth voice call cannot be performed. Re-enter the appropriate SAR value through) to return to the process (S13) (S17).

As a result of the checking, if the RF characteristic protocol is satisfied, the main controller 14 controls the automatic gain controller 15 according to the determined final transmission power intensity to adjust the gain of the transmission signal (S16). In addition to emitting the electromagnetic wave of the SAR value specified by the user to provide the optimal call quality by outputting the transmission signal of the appropriate intensity.

Here, the RF characteristic protocol refers to the transmission power strength of the mobile communication terminal recommended by the mobile communication provider in order to efficiently operate the entire mobile communication network and provide the maximum quality of service (QoS).

As described above, the present invention provides a specific absorption rate (SAR), which is a strength of electromagnetic waves emitted from the terminal within a desired range for the voice call to be determined by the user while performing a voice call through the mobile communication terminal. Value) and determine the strength of the signal transmitted to the base station accordingly, thereby preventing unnecessary increase in the strength of the transmission signal and increasing the SAR value, thereby preventing the user from being sensitive to electromagnetic waves. It is effective in reducing the damage caused by the electromagnetic waves emitted and providing the best call quality.

Claims (3)

Storing a Specific Absorption Rate (SAR) value according to the transmission power strength; Retrieving a transmission power strength corresponding to the requested SL value when a request for adjustment of an SL value is requested while performing a voice call; Determining final transmission power strength according to a pre-stored optimal condition algorithm; Determining whether the determined final transmission power strength satisfies RF (Radio Frequency) characteristic regulation, and adjusting gain of the transmission signal according to the final transmission power strength. Transmission power determination method by egg control. The method of claim 1, wherein the storing of the ES value according to the transmission power intensity comprises: measuring an ES value emitted to the outside according to the power strength of the transmission signal output from the mobile communication terminal by an experiment; Transmitting power determining method by adjusting the SL in the mobile communication terminal characterized in that the storage in the form. The method of claim 1, wherein the determining of the final transmission power strength according to the pre-stored optimal condition algorithm, wherein the final transmission power strength is determined to be equal to or less than the user-specified transmission power strength. Transmit Power Determination Method by SL Control

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