KR101770203B1 - User equipment and method for controlling transmission power of user equipment - Google Patents

Abstract

A method for controlling transmission power of a terminal and a terminal is disclosed. The terminal according to the present invention may include a receiving module and a power value determining module. The receiving module may include a communication mode indicating whether the first wireless communication chip that transmits the first signal to which the first wireless communication scheme is applied performs a random access channel (RACH) process for connection with the base station Information is received. The power value determination module transmits the first and second signals simultaneously in the second wireless communication chip that transmits the second signal by applying the first wireless communication chip and the second wireless communication method based on the received communication mode information The transmission power value of the second signal corresponding to the second signal can be determined.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of controlling transmission power of a terminal and a terminal,

The present invention relates to a method of controlling transmission power of a terminal and a terminal.

With the remarkable development of wireless communication technology, the use of radio waves has increased in demand, and is widely used not only in the communication and broadcasting fields but also in daily life of medical, traffic and surrounding. As the use of electronic and electric devices has soared, electromagnetic waves radiated from these radio wave utilization facilities and devices have had a great influence on the human body. In particular, for mobile devices, the Federal Communications Commission (FCC) has adopted guidelines for the environmental impact assessment of radio frequency radiation from FCC 96-326 to provide localized power dissipation for any portable transmitters And the limits of the limits.

The maximum permissible exposure limits specified here are based on exposure assessment criteria quantified in terms of the Specific Absorption Rate (SAR), a measure of the radio frequency (RF) energy absorption rate. When the human body is irradiated with electromagnetic waves, the quantitative evaluation of electromagnetic waves is performed by SAR measurement by means of power measurement, electromagnetic field analysis, and animal experiment. The SAR is generally expressed by the absorption power per unit mass absorbed by the human body .

In addition to the US FCC, the European Commission for Electrotechnical Standardization (CENELEC) also specifies SAR requirements as a requirement for conformity assessment for mobile terminals. As such, the FCC in the US and CENELEC in Europe have designated SAR as an important item in the conformity assessment of mobile terminals, although there is a difference in the reference value. Therefore, the mobile communication terminal must satisfy the SAR condition (or regulation).

Generally, in a wireless communication system, a terminal needs to comply with a Specific Absorption Rate (SAR) code even when two or more different wireless communication systems are simultaneously transmitting signals. have. In order to prevent the case where the first and second wireless communication chips are simultaneously transmitting signals at the maximum power and exceed the SAR reference, the transmission power value of the signal to be transmitted from the first wireless communication chip is It is necessary to inform the second wireless communication chip to limit the transmission power in the other wireless communication chip.

However, the method of measuring the transmission power of the first wireless communication chip and transmitting it to the second wireless communication chip has not yet been specifically proposed.

According to an aspect of the present invention, there is provided a terminal capable of simultaneously transmitting signals to which different wireless communication methods are applied.

According to another aspect of the present invention, there is provided a method of controlling transmission power of a terminal capable of simultaneously transmitting signals to which different wireless communication methods are applied.

The technical problems to be solved by the present invention are not limited to the technical problems and other technical problems which are not mentioned can be understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a terminal comprising: at least one interface; A reception module for receiving a transmission power value of a first signal to be transmitted at a next signal transmission timing in a first wireless communication chip to which the first wireless communication scheme is applied through the one or more interfaces; And a second wireless communication module to which the second wireless communication method is applied using the power value of the received first signal and the preset power back-off value corresponding to the power value of the received first signal, And a second transmission power value determination module for determining a transmission power value of a second signal to be transmitted simultaneously with the first signal at a transmission timing.

Here, the at least one interface may be a general purpose input output (GPIO) interface.

The power back-off value may be determined so as to satisfy a predetermined Specific Absorption Rate (SAR) condition when the first and second signals are simultaneously transmitted at the next signal transmission timing. The first wireless communication scheme is a communication scheme having a higher priority in terms of transmission power when signals are simultaneously transmitted over the second wireless communication scheme.

The first signal may be a voice signal and the second signal may be a data signal.

The terminal may further include a first wireless communication chip for transmitting a first signal to which the first wireless communication scheme is applied, and the first wireless communication chip may transmit the first signal to be transmitted at the next signal transmission timing A first transmission power value determination module for determining a power value; And a transmission module for transmitting the determined transmission power value of the first signal through the at least one interface.

According to another aspect of the present invention, there is provided a terminal comprising: at least one interface; A receiving module for receiving, through the at least one interface, first transmission power information, which is information on a transmission power of a first signal to be transmitted at a next signal transmission timing in a first wireless communication chip to which the first wireless communication scheme is applied; And a second wireless communication chip to which a second wireless communication scheme is applied based on the received first transmission power information, determines a transmission power value of a second signal to be simultaneously transmitted with the first signal at the next signal transmission timing, And a transmission power value determination module.

Here, the at least one interface may be a general purpose input output (GPIO) interface.

If the first transmission power information received by the receiving module indicates that there is no need to power back off the second signal to be transmitted simultaneously with the first signal at the next signal transmission timing, The determination module may determine a transmission power value of the second signal as a maximum transmission power value that can be transmitted from the second wireless communication chip.

Wherein the receiving module receives information indicating that the received first transmission power information needs to be power back-off with respect to the second signal to be transmitted simultaneously with the first signal at the next signal transmission timing, Wherein the second transmission power value determination module determines the transmission power value of the first signal to be transmitted based on the transmission power value of the first signal to be transmitted, The transmission power value of the second signal to be transmitted simultaneously with the first signal may be determined at the timing. Also, information indicating that power back-off is not required for the second signal may be received via one GPIO interface bit.

The terminal may further include a first wireless communication chip for transmitting a first signal to which the first wireless communication scheme is applied, and the first wireless communication chip may transmit the transmission power of the first signal to be transmitted at the next signal transmission timing A first transmission power value determination module for determining a transmission power value; And a transmission module for transmitting the determined transmission power value of the first signal through the at least one interface.

According to another aspect of the present invention, there is provided a method of controlling transmission power of a mobile station in a first wireless communication chip to which a first wireless communication scheme is applied through one or more interfaces, Receiving a transmission power value of a first signal to be transmitted; And a second wireless communication module to which the second wireless communication method is applied using the power value of the received first signal and the preset power back-off value corresponding to the power value of the received first signal, And a second transmission power value determination step of determining a transmission power value of a second signal to be transmitted simultaneously with the first signal at a transmission timing.

Here, the at least one interface may be a general purpose input output (GPIO) interface. The power back-off value may be determined so as to satisfy a predetermined Specific Absorption Rate (SAR) condition when the first and second signals are simultaneously transmitted at the next signal transmission timing.

According to another aspect of the present invention, there is provided a method of controlling transmission power of a terminal in a first wireless communication chip to which a first wireless communication scheme is applied, A first transmission power information reception step of receiving first transmission power information, which is information on a transmission power of the mobile station, through the at least one interface; And a second wireless communication chip to which a second wireless communication scheme is applied based on the received first transmission power information, determines a transmission power value of a second signal to be simultaneously transmitted with the first signal at the next signal transmission timing, And determining a transmission power value.

Wherein the one or more interfaces may be a GPIO (General Purpose Input Output) interface. If the first transmission power information received in the first transmission power information reception step indicates that there is no need to perform power back-off with respect to the second signal to be transmitted simultaneously with the first signal at the next signal transmission timing And the second transmission power value determining step may determine the transmission power value of the second signal as the maximum transmission power value that can be transmitted by the second wireless communication chip.

Information indicating that the first transmission power information received in the first transmission power information reception step needs to be power-back-off with respect to the second signal to be transmitted simultaneously with the first signal at the next signal transmission timing, Wherein the second transmission power value determination step uses the previously set power back-off value corresponding to the transmission power value of the first signal when the transmission power value information of the first signal to be transmitted at the signal transmission timing is included The transmission power value of the second signal to be simultaneously transmitted with the first signal may be determined at the next signal transmission timing.

Information indicating that power back-off is not required for the second signal can be received via one GPIO interface bit.

According to the present invention, it is possible to accurately and efficiently control the transmission power when signals to which a wireless communication scheme is applied are simultaneously transmitted.

Specifically, according to the present invention, the transmission power of the first wireless communication chip to be transmitted at the next signal transmission timing can be transmitted to the second wireless communication chip without delay by using the interface (for example, the GPIO interface) 2 wireless communication chip, it is possible to perform an accurate power back-off because there is no need to provide an additional power margin value in power back-off.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
1 is a diagram showing an example of a configuration of a terminal 100 according to the present invention,
2 is a diagram illustrating a process for controlling power of a terminal 100 by a first wireless communication chip 110 according to an embodiment of the present invention,
3 is a diagram illustrating a process for controlling power of the terminal 100 by the second wireless communication chip 110 according to the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, those skilled in the art will appreciate that the present invention may be practiced without these specific details.

In some instances, well-known structures and devices may be omitted or may be shown in block diagram form, centering on the core functionality of each structure and device, to avoid obscuring the concepts of the present invention. In the following description, the same components are denoted by the same reference numerals throughout the specification.

In addition, in the description of the present invention, a terminal may be a moving or fixed type mobile station such as a user equipment (UE), a mobile station (MS), an advanced mobile station (AMS), a mobile handset, All of the communication devices used by the user of the mobile communication terminal. It is also assumed that the base station collectively refers to any node at a network end that communicates with a terminal such as a Node B, an eNode B, a BS (Base Station), and an AP (Access Point).

The term "wireless communication system" in the present invention may be referred to as various forms such as a radio access technology (RAT) system. Examples of the wireless communication system or the wireless access technology system include a Code Division Multiple Access (CDMA), a Wideband Code Division Multiple Access (WCDMA), and a Long Term Evolution (LTE).

In a wireless communication system, a terminal can receive a signal through a downlink from a base station, and the terminal can also transmit a signal through an uplink. The information transmitted or received by the terminal includes data and various control information, and various physical channels exist depending on the type of information transmitted or received by the terminal.

In this specification, the first wireless communication chip and the second wireless communication chip are chips for transmitting signals by applying different wireless communication systems or wireless connection technology systems. Hereinafter, for example, it is assumed that the first wireless communication chip is a chip using a CDMA scheme and the second wireless communication chip is a chip using an LTE scheme, but the present invention is not limited thereto.

The first wireless communication chip of the terminal transmits the current transmission power value to the second wireless communication chip. Then, the second wireless communication chip sets the transmission power value of the signal to be transmitted at the next signal transmission timing. At this time, the time corresponding to the transmission power value in the first wireless communication chip and the transmission power value to be determined in the second wireless communication chip A time delay may occur between the corresponding time, such as a time to be transmitted through the interface and a processing time in the second wireless communication chip.

Therefore, since there is a possibility that the current transmission power value in the first wireless communication chip is changed during this delay, the second wireless communication chip can calculate the change amount of the transmission power in the first wireless communication chip, Additional power margin must be provided to meet SAR requirements. However, this additional power margin may result in a lower transmit power and an incomplete power back-off. Therefore, a terminal that improves these problems will be described below.

1 is a diagram showing an example of a configuration of a terminal 100 according to the present invention.

1, a terminal 100 includes a first wireless communication chip 110, a second wireless communication chip 120, an interface 130, an RF front-end module 140, And an antenna 150. The first wireless communication chip 110 may further include a first transmission power determination module 111 and a transmission module 112. Also, the second wireless communication chip 120 may include a receiving module 121 and a second transmission power determination module 122.

The first and second wireless communication chips 110 and 120 modulate the original signal (baseband signal) into a signal of a high frequency band during a signal transmission process, Performs a function of demodulating the received high frequency signal into a baseband signal. Each of the wireless communication chips 110 and 120 may be implemented as a " RF (Radio Frequency) chip " for modulating a signal processed in the baseband into a signal in a high frequency band, and a baseband chip for processing a baseband signal, An RF chip and a baseband chip may be implemented in which a signal processed in the baseband is modulated into a high frequency band or an RF chip in which a received signal is demodulated into a low frequency band and processed as a baseband signal. Also, the first and second wireless communication chips 110 and 120 may be implemented as separate chips as shown in FIG. 1, but may be implemented as a single chip.

As described above, the first wireless communication chip 110 and the second wireless communication chip 120 process the original signal into a signal of a high frequency band during a signal transmission process, and conversely, Band signal and perform modulation / demodulation functions, respectively.

When the terminal 100 needs to simultaneously transmit signals to a plurality of wireless communication chips 110 and 120 to which different wireless communication systems are applied, the first wireless communication chip 110 transmits the original signal to the first frequency band And at the same time, the second wireless communication chip 120 can perform a function of processing the original signal into a signal of the second frequency band. That is, the terminal 100 can transmit signals by modulating signals in different frequency bands in the first and second wireless communication chips 110 and 120 during signal transmission. In general, when the terminal 100 simultaneously transmits signals processed by the first and second wireless communication chips 110 and 120, the terminal 100 transmits signals through different frequency bands.

Referring to FIG. 1, a first transmission power value determination module 111 of a first wireless communication chip 110 receives a first transmission power value of a first wireless communication chip 110, And determines the transmission power value of the signal. The first transmission power determination module 111 determines the transmission power of the second wireless communication chip based on the transmission power value of the first signal determined to be transmitted at the next signal transmission timing, It may be determined whether power back-off is required for the power value of the second signal to be transmitted.

If the first transmission power determination module 111 determines that it is not necessary to perform power back-off with respect to the power value of the second signal to be transmitted by the second wireless communication chip according to the determined transmission power value of the first signal, It may be determined in the communication chip that it is not necessary to perform power back-off with respect to the power value of the signal to be transmitted at the next signal transmission timing. Information determined to be not required to perform the power back-off is transmitted to the transmission module 112 and the transmission module 112 transmits the information to the outside via the interface 130 (for example, the second wireless communication chip 120), or an external device or module). That is, if the first transmission power determination module 111 determines that it is not necessary to power back off the power value of the signal to be transmitted at the next signal transmission timing in the second wireless communication chip, (E.g., the second wireless communication chip 120, or an external device or module) via a bit.

Alternatively, if the first transmission power determination module 111 determines that it is necessary to perform power back-off with respect to the power value of the second signal to be transmitted by the second wireless communication chip according to the determined transmission power value of the first signal , It may decide to perform power back-off for the signal to be transmitted at the next signal transmission timing in the second wireless communication chip. The information determined to be required to perform the power back-off and the determined transmission power value of the first signal are transmitted to the transmission module 112 and the transmission module 112 transmits the transmission power value to the outside through the interface 130 For example, the second wireless communication chip 120, or an external device or module). At this time, the transmitting module 112 transmits information determined to be required to perform power back-off through one bit of the interface 130, and transmits the power back-off value or the determined transmission power value of the first signal to the interface 130 ≪ / RTI >

The above case corresponds to a case where the number of GPIO interfaces is limited to a predetermined number. That is, if the number of the GPIO interfaces is limited to a predetermined number, the transmitting module 112 transmits 1-bit (enable / disable bit) information to the interface 130 as to whether or not it is necessary to perform power back- (enable / disable bit). If it is necessary to perform a power back-off, the transmitting module 112 transmits the power back-off value or the determined transmission power value of the first signal through the remaining bits of the interface 130. [

Alternatively, if a number of GPIO interfaces are available, the transmitting module 112 may transmit the transmission power value of the first signal determined by the first transmission power determination module 111 to the outside Lt; / RTI >

The interface 130 is connected to exchange signals and information between the first wireless communication chip 110 and the second wireless communication chip 120. As an example of the interface 130, there is a general purpose input output (GPIO) interface. GPIO means general-purpose IO. It is not allocated for any special purposes such as reset, ground, clock pin, but it can be used for various purposes depending on how the program is set up. Pin. GPIO allows you to receive keystrokes, control specific devices, and allow certain devices to operate when certain conditions occur in the software.

GPIOs usually have pin states for two modes: input and output. Of course, it does not exist at the same time. It is common for the programmer to determine whether the input is an input or an output. Therefore, the programmer must make settings for the GPIO to be used. Most recently used 32-bit microcontrollers support from 30 to 200 GPIOs. So even an MCU with only 40 pins can support 200 functions. This is possible because one GPIO supports multiple functions.

The receiving module 121 of the second wireless communication chip 120 can receive the information determined by the first transmission power determination module 111 from the transmission module 112 through the interface 130. [ Here, the receiving module 121 is located in the power measurement device or module outside the first wireless communication chip 110 and measures the measured power value of the signal transmitted from the first wireless communication chip 110 through another interface or the like Lt; / RTI >

If the number of GPIO interfaces is limited to a predetermined number, the receiving module 121 transmits information on whether or not the power back-off needs to be performed to 1 bit (enable / disable bit) of the interface 130 enable / disable bit). If it is necessary to perform a power back-off, the receiving module 121 may receive the power back-off value or the determined transmission power value of the first signal through the remaining bits of the interface 130 .

Alternatively, if a number of GPIO interfaces are available, the receiving module 121 receives the transmission power value of the first signal determined by the first transmission power determination module 111 through one or more interfaces 130 can do.

The second transmission power determination module 122 determines a transmission power value of a signal to be transmitted at the next signal transmission timing in the second wireless communication chip based on the information about the transmission power of the first signal received by the reception module 121 .

If the number of GPIO interfaces is available, the second transmission power determination module 122 determines whether the number of GPIO interfaces corresponding to the power value of the first signal received by the reception module 121 and the power value of the received first signal The transmission power value of the second signal to be transmitted simultaneously with the first signal at the next signal transmission timing in the second wireless communication chip can be determined using the preset power back-off value.

Here, the predetermined power back-off value is a predetermined Specific Absorption Rate (SAR) when the first and second wireless communication chips simultaneously transmit the first and second signals at the next signal transmission timing, It is determined that the condition is satisfied. That is, the transmit power value to be allocated to the second signal to be transmitted at the next timing in the second wireless communication chip is determined by performing a power back-off on the power value set for the first signal to be transmitted at the next timing in the first wireless communication chip .

Table 1 below is a table showing an example of a possible transmission power value (in dBm) when signals are simultaneously transmitted from a plurality of wireless communication chips 110 and 120 to which different wireless communication systems are applied in the terminal 100 .

The first wireless communication chip The second wireless communication chip Maximum Transmit Power Value (dBm) 23 23 Example of Transmit Power Value (dBm) 22 22 21 21 20 20 19 19 18 18

Referring to Table 1, the maximum transmit power value may be set in advance, and may be 23 dBm as an example. Each of the plurality of wireless communication chips 110 and 120 to which different wireless communication schemes of the terminal 100 are applied can transmit a signal with a power value of up to 23 dBm. However, if a plurality of wireless communication chips 110 and 120 transmit signals at a size of 23 dBm at the same time, the SAR regulations are violated. Therefore, if the set power value of the signal to be transmitted at the next timing in the first wireless communication chip 110 is 23 dBm, which is the maximum transmission power value, the power value to be transmitted from the second wireless communication chip 120 should be smaller than 23 dBm. That is, the transmission power value of the second wireless communication chip 120 needs to be back-off power at the maximum transmission power value according to the transmission power value of the first wireless communication chip 110 so as to satisfy the SAR requirement .

Table 2 below is a table showing an example of the maximum transmission power value of the second wireless communication chip 120 according to the transmission power value of the first wireless communication chip 110 so as to satisfy the SAR condition.

Example of the transmission power value of the first wireless communication chip (dBm) Example of the transmission power value of the second wireless communication chip (dBm) A power back-off value (dBm) for a signal to be transmitted in the second wireless communication chip, 23 18 5 22 19 4 21 20 3 20 21 2 19 22 One 18 23 0

As shown in Table 2, the transmission power values of the transmission signals in the first and second wireless communication chips 110 and 120 that satisfy the SAR condition can be set in advance. For example, as shown in Table 2, if the first signal transmission power value to be transmitted at the next signal transmission timing in the first wireless communication chip 110 is 23 dBm, which is the maximum transmission power value, the second transmission power determination module 122 May perform power back-off with respect to the transmission power value of the second signal to be transmitted at the next signal transmission timing in the second wireless communication chip 120 and may determine 18 dBm as the power value of the signal to be transmitted. That is, in this case, the second transmission power determination module 122 performs a 5 dBm backoff at 23 dBm, which is the maximum transmission power value, and determines 18 dBm as the power value of the transmission signal. That is, the power back-off value is 5 dBm.

The first wireless communication chip 110 transmits a signal by applying the CDMA method when the signals are simultaneously transmitted from the first wireless communication chip 110 and the second wireless communication chip 120, Assuming that the chip 120 transmits a signal by applying the LTE scheme, the first wireless communication chip 110 mainly transmits a voice signal and the second wireless communication chip 120 mainly transmits a data signal. In the case where the terminal 100 simultaneously transmits voice and data signals, since there is a priority in wireless communication for transmitting voice signals from the viewpoint of transmission power, the second transmission power determination module 122 determines the transmission power The transmission power value of the signal to be transmitted at the next timing in the second wireless communication chip 120 can be determined according to the power value of the first signal to be transmitted at the next timing in the chip 110. [ The second transmission power value determination module 122 may determine a value to back off the power of a signal to be transmitted from the second wireless communication chip 120 and determine a transmission power value according to the value shown in Table 2. [

If the number of GPIO interfaces is limited to a predetermined number, the second transmission power determination module 122 determines whether the reception module 121 receives 1 bit (enable / disable bit) of the interface 130 Off of the second signal to be transmitted at the next signal transmission timing is performed only when the power back-off is needed based on the information about whether or not the power back-off received through the transmitting terminal The power value is determined. That is, the second transmission power determination module 122 determines that the transmission power of the receiving module 121 is lower than the power of the receiving module 121 only when the receiving module 121 receives information indicating that the power back-off is required through the enable bit (1 bit) Back-off to determine the transmit power value of the second signal. If the information that the receiving module 121 does not need to perform a power back-off is received via the interface 130 disable bit (1 bit), the second transmission power determination module 122 determines And does not perform power back-off with respect to the power value of the second signal to be transmitted at the signal transmission timing. In this case, the second transmission power determination module 122 may determine the next timing transmission power value of the second signal as a maximum transmission power value (e.g., 23 dBm).

The receiving module 121 and the second transmission power determination module 122 are implemented in the second wireless communication chip. However, the reception module 121 and the second transmission power determination module 122 are separate Lt; / RTI > device or module.

A power amplifier (PA) (not shown) amplifies a received signal by being processed in the first wireless communication chip 110 and the second wireless communication chip 120 .

The RF front-end module 140 can perform transmission and reception of the terminal 100 and enable communication in various environments. The RF front-end module 140 connects the antenna 150 in the terminal 100 with the first wireless communication chip 110 and the second wireless communication chip 120 to separate the transmission and reception signals . The RF front-end module 140 includes a receiving-end front-end module having a receiving-signal filtering filter as a module for filtering and amplifying, a power amplifier (not shown) for amplifying a transmitting signal, And a built-in transmitter front-end module. This RF front-end module 140 is mainly used in a Global System for Mobile communications (GSM) terminal of a time division (TDMA) type in which a transmission signal and a reception signal must be switched during a call .

In addition, the RF front-end module 140 can be used to transmit signals over multiple frequency bands, such as the terminal 100 described in the present invention. For example, the RF front-end module 140 allows the terminal 100 to use the GSM method and the W-CDMA method at the same time. By using the RF front-end module 140, it is possible to reduce the number of components of the terminal 100 and improve the reliability of the terminal 100, The loss can be reduced.

The RF front-end module 140 reduces power consumption, dramatically improves battery consumption, and enables miniaturization of components of multiple frequency bands and multi-function terminals. 1, the RF front-end module 140 can transmit signals processed in a plurality of frequency bands received from a power amplifier (not shown) through the antenna 150, respectively have.

Although the antenna 150 is shown as one in FIG. 1, the terminal 100 may have a plurality of antennas.

2 is a diagram illustrating a process for controlling power of the terminal 100 by the first wireless communication chip 110 according to the present invention.

2, the first wireless communication chip 110 determines whether or not the number of the interfaces 130 (for example, GPIOs) for exchanging signals and information with the second wireless communication chip 120 is equal to or greater than a predetermined number (S210). The method of controlling the power of the terminal 100 may be different depending on whether the number of the interfaces 130 is equal to or greater than a predetermined number.

If the number of interfaces 130 is equal to or greater than a predetermined number (that is, if a large number of interfaces can be used) (S210), the first transmission power determination module 111 determines, The transmission power value of the signal can be determined (S220). Alternatively, the first transmission power determination module 111 may determine a power back-off value to be power-back-off with respect to a signal to be transmitted from the second wireless communication chip according to the transmission power value of the first signal to be transmitted at the next signal transmission timing (S220). Then, the transmitting module 112 transmits the transmission power value or the power back-off value of the first signal at the next determined timing to the outside (for example, the second wireless communication chip 120, or the external device or module) (S230).

Alternatively, if the number of interfaces 130 is less than a predetermined number (that is, if the available number of interfaces is limited) (S210), the first transmission power determination module 111 transmits The transmission power value of the first signal can be set (S240). Then, the first transmission power determination module 111 determines a power back-off value for the transmission power value of the second signal to be transmitted at the next signal transmission timing in the second wireless communication chip simultaneously based on the transmission power value of the set first signal It may be determined whether it is necessary to perform the operation (S250). If the first transmission power determination module 111 determines that the power back-off performance is not required (S250), the transmission module 112 determines that the power back-off is performed for the second signal to be transmitted at the next signal transmission timing (E.g., the second wireless communication chip 120, or an external device or module) to the external device (S260). Alternatively, if the first transmission power determination module 111 determines that the power back-off performance is required (S250), the transmission module 112 determines the transmission power of the determined first signal and the power back Information indicating that it is necessary to perform the " -off " can be transmitted to the outside (S270).

3 is a diagram illustrating a process for controlling power of the terminal 100 by the second wireless communication chip 110 according to the present invention.

The receiving module 121 may receive information indicating that power back-off is not necessary for the second signal to be transmitted at the next signal transmission timing in the second wireless communication chip 120 (S310). Then, the second transmission power determination module 122 does not perform power back-off. In particular, in this case, the second transmission power determination module 122 may assign the maximum transmission power value in the second wireless communication chip 120 to the transmission power value of the second signal to be transmitted at the next signal transmission timing.

Alternatively, the receiving module 121 may receive the transmission power value of the first signal determined to be transmitted at the next signal transmission timing in the first wireless communication chip 110 through the interface 130 (S330). The second transmission power determination module 122 may determine a transmission power value of a second signal to be transmitted at a next timing using the transmission power value of the first signal received by the reception module 121 at step S340.

The first wireless communication chip 110 and the second wireless communication chip 120 can simultaneously transmit the first signal and the second signal with the transmission power value controlled through the above process, Meets SAR requirements.

Embodiments in accordance with the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of hardware implementation, an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs) Field Programmable Gate Arrays), a processor, a controller, a microcontroller, a microprocessor, or the like.

In the case of an implementation by firmware or software, an embodiment of the present invention may be implemented in the form of a module, a procedure, a function, or the like which performs the functions or operations described above. The software code can be stored in a memory unit and driven by the processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various well-known means.

The embodiments described above are those in which the elements and features of the present invention are combined in a predetermined form. Each component or feature shall be considered optional unless otherwise expressly stated. Each component or feature may be implemented in a form that is not combined with other components or features. It is also possible to construct embodiments of the present invention by combining some of the elements and / or features. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of certain embodiments may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments. It is clear that the claims that are not expressly cited in the claims may be combined to form an embodiment or be included in a new claim by an amendment after the application.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

Claims (22)

One or more interfaces;
A reception module for receiving a transmission power value of a first signal to be transmitted at a next signal transmission timing in a first wireless communication chip to which the first wireless communication scheme is applied through the one or more interfaces; And
The second wireless communication chip to which the second wireless communication scheme is applied, using the previously set power back-off value corresponding to the power value of the received first signal and the power value of the received first signal, And a second transmission power value determination module for determining a transmission power value of a second signal to be transmitted simultaneously with the first signal at a timing. The method according to claim 1,
Wherein the at least one interface is a GPIO (General Purpose Input Output) interface. The method according to claim 1,
Wherein the power back-off value is determined to satisfy a predetermined Specific Absorption Rate (SAR) condition when the first and second signals are simultaneously transmitted at the next signal transmission timing. The method according to claim 1,
Wherein the first wireless communication scheme is a communication scheme having a higher priority in terms of transmission power when signals are simultaneously transmitted over the second wireless communication scheme. 5. The method of claim 4,
Wherein the first signal is a voice signal and the second signal is a data signal. The method according to claim 1,
Further comprising a first wireless communication chip for transmitting a first signal to which the first wireless communication scheme is applied. 6. The method of claim 5,
The first wireless communication chip includes:
A first transmission power value determination module for determining a transmission power value of the first signal to be transmitted at the next signal transmission timing; And
And a transmission module for transmitting the determined transmission power value of the first signal through the at least one interface. One or more interfaces;
A receiving module for receiving, through the at least one interface, first transmission power information, which is information on a transmission power of a first signal to be transmitted at a next signal transmission timing in a first wireless communication chip to which the first wireless communication scheme is applied; And
A second transmission for determining a transmission power value of a second signal to be simultaneously transmitted with the first signal at the next signal transmission timing in a second wireless communication chip to which the second wireless communication scheme is applied based on the received first transmission power information; And a power value determination module,
The second transmit power determination module may be configured to determine whether the received first transmit power information is information indicating that it is not necessary to power back off the second signal to be transmitted simultaneously with the first signal at the next signal transmission timing And determines a transmission power value of the second signal as a maximum transmission power value that can be transmitted by the second wireless communication chip. 9. The method of claim 8,
Wherein the at least one interface is a GPIO (General Purpose Input Output) interface. delete 9. The method of claim 8,
When the received first transmission power information further includes transmission power value information of the first signal to be transmitted at the next signal transmission timing,
Wherein the second transmission power determination module determines the transmission power of the second signal to be transmitted simultaneously with the first signal at the next signal transmission timing using a preset power back- And determining a value of the terminal. 9. The method of claim 8,
Wherein information indicating that power back-off is not required for the second signal is received via one GPIO interface bit. 9. The method of claim 8,
Further comprising a first wireless communication chip for transmitting a first signal to which the first wireless communication scheme is applied. 14. The method of claim 13,
A first transmission power value determination module for determining a transmission power value of the first signal to be transmitted at the next signal transmission timing; And
And a transmission module for transmitting the determined transmission power value of the first signal through the at least one interface. Receiving a transmission power value of a first signal to be transmitted at a next signal transmission timing in a first wireless communication chip to which a first wireless communication scheme is applied through one or more interfaces; And
The second wireless communication chip to which the second wireless communication scheme is applied, using the previously set power back-off value corresponding to the power value of the received first signal and the power value of the received first signal, And a second transmission power value determining step of determining a transmission power value of a second signal to be transmitted simultaneously with the first signal at a timing. delete delete A first transmission power information reception step of receiving, through one or more interfaces, first transmission power information which is information on a transmission power of a first signal to be transmitted at a next signal transmission timing in a first wireless communication chip to which a first wireless communication scheme is applied; And
A second transmission for determining a transmission power value of a second signal to be simultaneously transmitted with the first signal at the next signal transmission timing in a second wireless communication chip to which the second wireless communication scheme is applied based on the received first transmission power information; And a power value determining step,
If the first transmission power information received in the first transmission power information reception step indicates that there is no need to perform power back-off with respect to the second signal to be transmitted simultaneously with the first signal at the next signal transmission timing,
Wherein the second transmission power value determining step determines the transmission power value of the second signal as the maximum transmission power value that can be transmitted by the second wireless communication chip. delete delete delete delete

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