Electronic device for controlling transmission power on basis of specific absorption rate, operation method therefor, and storage medium

Abstract

According to an embodiment, an electronic device may comprise: a communication circuit; at least one processor including processing circuitry; and a memory for storing instructions, wherein the instructions, when executed individually or collectively by the at least one processor, cause the electronic device to: establish a connection with an external device through the communication circuit (190); in a first transmission mode, during a first subperiod of a first time period configured on the basis of a time averaged specific absorption rate feature operation, transmit a signal to the external device on the basis of configuring a first maximum transmission power higher than a maximum transmission power limit value configured on the basis of the time averaged specific absorption rate feature operation; during a second subperiod of the first time period, transmit a signal to the external device on the basis of configuring a second maximum transmission power lower than the maximum transmission power limit value; switch from the first transmission mode to a second transmission mode on the basis of identifying occurrence of a switching event on the basis of information associated with at least one of a channel state, a data size, and a specific absorption rate budget during the signal transmission to the external device; in the second transmission mode, during a third subperiod of a second time period configured on the basis of the specific absorption rate feature operation, transmit a signal to the external device on the basis of configuring a third maximum transmission power equal to or lower than the first maximum transmission power; and during a fourth subperiod of the second time period, transmit a signal to the external device on the basis of configuring a fourth maximum transmission power different from the second maximum transmission power.

Description

Electronic device for controlling transmission power based on electromagnetic absorption rate, and method of operation and storage medium thereof

[0001] Various embodiments of the present disclosure relate to an electronic device for controlling transmission power based on a specific absorption rate (SAR), and an operating method and storage medium thereof.

[0002] User equipment (UE) can transmit electromagnetic waves to transmit and receive data with a base station. The electromagnetic waves emitted by UE can have harmful effects on the human body, and various domestic and international organizations are attempting to limit the electromagnetic waves that have harmful effects on the human body. For example, the specific absorption rate (SAR) is a numerical value that indicates how much electromagnetic waves emitted from a mobile communication terminal are absorbed by the human body. SAR is expressed in units of kW / g (or mW / g), which can mean the amount of power (kW, W, or mW) absorbed per 1 gram of body mass. As concerns about the harmful effects of electromagnetic waves on the human body have emerged, SAR limits for mobile communication terminals have been established.

[0003] According to one embodiment of the present disclosure, an electronic device may include a communication circuit.

[0004] According to one embodiment of the present disclosure, an electronic device may include at least one processor including processing circuitry.

[0005] According to one embodiment of the present disclosure, an electronic device may include a memory that stores instructions.

[0006] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the at least one processor, may cause the electronic device to establish a connection with an external device via the communication circuit.

[0007] According to one embodiment of the present disclosure, the instructions, when executed individually or collectively by the at least one processor, may cause the electronic device, in a first transmission mode, to transmit a signal to the external device based on setting a first maximum transmit power higher than a maximum transmit power limit value set based on a time averaged specific absorption rate feature operation during a first portion of a first time interval set based on a time averaged specific absorption rate feature operation, and to transmit a signal to the external device based on setting a second maximum transmit power lower than the maximum transmit power limit value during a second portion of the first time interval.

[0008] According to one embodiment of the present disclosure, the instructions, when executed individually or collectively by the at least one processor, may cause the electronic device to switch from the first transmission mode to the second transmission mode based on determining the occurrence of a switching event based on information associated with at least one of a channel condition, a data size, or a specific absorption rate budget when transmitting a signal to the external device.

[0009] According to one embodiment of the present disclosure, the instructions, when executed individually or collectively by the at least one processor, may cause the electronic device to transmit a signal to the external device based on setting a third maximum transmit power equal to or lower than the first maximum transmit power during a third period portion of the second time interval set based on the operation of the SAR function in the second transmission mode, and to transmit a signal to the external device based on setting a fourth maximum transmit power different from the second maximum transmit power during a fourth period portion of the second time interval.

[0010] According to one embodiment of the present disclosure, a method of an electronic device may include an operation of establishing a connection with an external device through a communication circuit of the electronic device.

[0011] According to one embodiment of the present disclosure, the method may include, in a first transmission mode, transmitting a signal to the external device based on setting a first maximum transmission power higher than a maximum transmission power limit value set based on a time-averaged specific absorption rate feature operation during a first period portion of a first time period set based on a time-averaged specific absorption rate feature operation, and transmitting a signal to the external device based on setting a second maximum transmission power lower than the maximum transmission power limit value during a second period portion of the first time period.

[0012] According to one embodiment of the present disclosure, the method may include an operation of switching from the first transmission mode to the second transmission mode based on determining the occurrence of a switching event based on information associated with at least one of a channel state, a data size, or a specific absorption rate budget when transmitting a signal to the external device.

[0013] According to one embodiment of the present disclosure, the method may include, in the second transmission mode, transmitting a signal to the external device based on setting a third maximum transmission power that is equal to or lower than the first maximum transmission power during a third period of the second time period set based on the operation of the SAR function, and transmitting a signal to the external device based on setting a fourth maximum transmission power that is different from the second maximum transmission power during a fourth period of the second time period.

[0014] According to one embodiment of the present disclosure, a storage medium storing computer-readable instructions may be provided.

[0015] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by at least one processor comprising processing circuitry of the electronic device, may cause the electronic device to establish a connection with an external device via communication circuitry of the electronic device.

[0016] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by at least one processor of the electronic device, may cause the electronic device, in a first transmission mode, to transmit a signal to the external device based on setting a first maximum transmission power higher than a maximum transmission power limit value set based on a time averaged specific absorption rate feature operation during a first portion of a first time interval set based on a time averaged specific absorption rate feature operation, and to transmit a signal to the external device based on setting a second maximum transmission power lower than the maximum transmission power limit value during a second portion of the first time interval.

[0017] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by at least one processor of the electronic device, may cause the electronic device to switch from the first transmission mode to the second transmission mode based on determining the occurrence of a switching event based on information associated with at least one of a channel state, a data size, or a specific absorption rate budget when transmitting a signal to the external device.

[0018] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by at least one processor of the electronic device, may cause the electronic device to transmit a signal to the external device based on setting a third maximum transmission power equal to or lower than the first maximum transmission power during a third period portion of the second time period set based on the operation of the SAR function in the second transmission mode, and to transmit a signal to the external device based on setting a fourth maximum transmission power different from the second maximum transmission power during a fourth period portion of the second time period.

[0019] FIG. 1 is a block diagram of an electronic device within a network environment according to various embodiments.

[0020] FIG. 2A is a block diagram of an electronic device for supporting legacy network communication and 5G network communication according to various embodiments.

[0021] FIG. 2b is a block diagram of an electronic device for supporting legacy network communication and 5G network communication according to various embodiments.

[0022] FIG. 3A illustrates a flowchart for explaining a method of operating an electronic device according to various embodiments.

[0023] FIG. 3b is a diagram for explaining transmission power and SAR over time according to various embodiments.

[0024] Figure 4a shows a graph of transmission power over time according to various embodiments.

[0025] Figure 4b shows a graph of transmission power over time according to various embodiments.

[0026] Figure 4c shows a graph of transmission power over time according to various embodiments.

[0027] FIG. 4d shows a table of time-dependent transmission power according to various embodiments.

[0028] FIG. 4e illustrates a table of time-dependent transmission power according to various embodiments.

[0029] FIG. 5A illustrates a block diagram illustrating an exemplary electronic device according to various embodiments.

[0030] FIG. 5b is a diagram illustrating an exemplary electronic device according to various embodiments.

[0031] FIG. 6 illustrates a flowchart for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0032] FIG. 7 is a diagram for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0033] FIG. 8A is a diagram for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0034] FIG. 8b is a diagram for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0035] FIG. 9 is a diagram for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0036] FIG. 10 is a diagram for explaining an increase in UL BLER due to setting of a limit value of the transmission power of an electronic device according to a comparative example.

[0037] FIG. 11 is a diagram for explaining a reduction in UL BLER due to setting of a limit value of a transmission power of an electronic device according to one embodiment.

[0038] FIG. 12 illustrates a flowchart for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0039] FIG. 13 is a drawing for explaining the relative position of an electronic device to a base station according to one embodiment.

[0040] FIG. 14 is a drawing for explaining a change in the operation mode of an electronic device according to one embodiment.

[0041] FIG. 1 is a block diagram of an electronic device (101) within a network environment (100) according to various embodiments.

[0042] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with an electronic device (104) or a server (108) via a second network (199) (e.g., a long-range wireless communication network). In one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0043] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or operations. According to one embodiment, as at least a part of the data processing or operations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or an auxiliary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together with the main processor (121). For example, when the electronic device (101) includes the main processor (121) and the auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a given function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0044] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, in the electronic device (101) itself where artificial intelligence is performed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0045] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0046] The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0047] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0048] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0049] The display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0050] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0051] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0052] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with an external electronic device (e.g., the electronic device (102)). In one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0053] The connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0054] The haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. According to one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0055] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0056] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

[0057] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0058] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (194) (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, the corresponding communication module can communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0059] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0060] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (197) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (198) or the second network (199), may be selected from the plurality of antennas, for example, by the communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device via the at least one selected antenna. In some embodiments, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197).

[0061] According to various embodiments, the antenna module (197) may form a mmWave antenna module. In one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0062] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0063] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0064] FIG. 2A is a block diagram (200) of an electronic device (101) for supporting legacy network communication and 5G network communication according to one embodiment.

[0065] Referring to FIG. 2A, the electronic device (101) may include a first communication processor (212), a second communication processor (214), a first radio frequency integrated circuit (RFIC) (222), a second RFIC (224), a third RFIC (226), a fourth RFIC (228), a first radio frequency front end (RFFE) (232), a second RFFE (234), a first antenna module (242), a second antenna module (244), a third antenna module (246), and antennas (248). The electronic device (101) may further include a processor (120) and a memory (130). The second network (199) may include a first cellular network (292) and a second cellular network (294). According to another embodiment, the electronic device (101) may further include at least one of the components described in FIG. 1, and the second network (199) may further include at least one other network. According to one embodiment, the first communication processor (212), the second communication processor (214), the first RFIC (222), the second RFIC (224), the fourth RFIC (228), the first RFFE (232), and the second RFFE (234) may form at least a portion of the wireless communication module (192). According to another embodiment, the fourth RFIC (228) may be omitted or may be included as a part of the third RFIC (226).

[0066] The first communication processor (212) may establish a communication channel in a band to be used for wireless communication with the first cellular network (292), and may support legacy network communication through the established communication channel. In one embodiment, the first cellular network may be a legacy network including a second generation (2G), 3G, 4G, or long term evolution (LTE) network. The second communication processor (214) may establish a communication channel corresponding to a designated band (e.g., about 6 GHz to about 60 GHz) among the bands to be used for wireless communication with the second cellular network (294), and may support 5G network communication through the established communication channel. In one embodiment, the second cellular network (294) may be a 5G network defined by the 3GPP. Additionally, according to one embodiment, the first communication processor (212) or the second communication processor (214) may support establishment of a communication channel corresponding to another designated band (e.g., about 6 GHz or less) among the bands to be used for wireless communication with the second cellular network (294), and 5G network communication through the established communication channel.

[0067] The first communication processor (212) can transmit and receive data with the second communication processor (214). For example, data classified to be transmitted via the second cellular network (294) may be changed to be transmitted via the first cellular network (292). In this case, the first communication processor (212) can receive the transmission data from the second communication processor (214). For example, the first communication processor (212) can transmit and receive data with the second communication processor (214) via the processor-to-processor interface (213). The above interprocessor interface (213) may be implemented as, for example, a universal asynchronous receiver / transmitter (UART) (e.g., HS-UART (high speed-UART) or PCIe (peripheral component interconnect bus express) interface), but there is no limitation on its type. Alternatively, the first communication processor (212) and the second communication processor (214) may exchange control information and packet data information using, for example, a shared memory. The first communication processor (212) may transmit and receive various information, such as sensing information, information on output intensity, and resource block (RB) allocation information, with the second communication processor (214).

[0068] Depending on the implementation, the first communication processor (212) may not be directly connected to the second communication processor (214). In this case, the first communication processor (212) may transmit and receive data with the second communication processor (214) through the processor (120) (e.g., application processor). For example, the first communication processor (212) and the second communication processor (214) may transmit and receive data with the processor (120) (e.g., application processor) through an HS-UART interface or a PCIe interface, but there is no limitation on the type of interface. Alternatively, the first communication processor (212) and the second communication processor (214) may exchange control information and packet data information with the processor (120) (e.g., application processor) using shared memory.

[0069] In one embodiment, the first communication processor (212) and the second communication processor (214) may be implemented in a single chip or a single package. In one embodiment, the first communication processor (212) or the second communication processor (214) may be formed in a single chip or a single package with the processor (120), the auxiliary processor (123), or the communication module (190). For example, as shown in FIG. 2B, the integrated communication processor (260) may support functions for communicating with both the first cellular network (292) and the second cellular network (294).

[0070] As described above, at least one of the processor (120), the first communication processor (212), the second communication processor (214), or the integrated communication processor (260) may be implemented as a single chip or a single package. In this case, the single chip or single package may include a memory (or storage means) that stores instructions that cause the performance of at least some of the operations performed according to various embodiments, and a processing circuit (or a processing circuit, the name of which is not limited thereto, such as an arithmetic circuit) for executing the instructions. The instructions stored in the memory, when individually or collectively executed by at least one processor, may cause the electronic device (101) to perform at least one operation.

[0071] The first RFIC (222) may, upon transmission, convert a baseband signal generated by the first communication processor (212) into a radio frequency (RF) signal of about 700 MHz to about 3 GHz used in a first cellular network (292) (e.g., a legacy network). Upon reception, the RF signal may be acquired from the first network (292) (e.g., a legacy network) via an antenna (e.g., the first antenna module (242)) and preprocessed via an RFFE (e.g., the first RFFE (232)). The first RFIC (222) may convert the preprocessed RF signal into a baseband signal so that it may be processed by the first communication processor (212).

[0072] The second RFIC (224) may, upon transmission, convert a baseband signal generated by the first communication processor (212) or the second communication processor (214) into an RF signal (hereinafter, a 5G Sub6 RF signal) of a Sub6 band (e.g., about 6 GHz or less) used in the second cellular network (294) (e.g., a 5G network). Upon reception, the 5G Sub6 RF signal may be acquired from the second cellular network (294) (e.g., a 5G network) via an antenna (e.g., the second antenna module (244)) and preprocessed via an RFFE (e.g., the second RFFE (234)). The second RFIC (224) may convert the preprocessed 5G Sub6 RF signal into a baseband signal so that the preprocessed 5G Sub6 RF signal may be processed by a corresponding communication processor among the first communication processor (212) or the second communication processor (214).

[0073] The third RFIC (226) can convert the baseband signal generated by the second communication processor (214) into an RF signal (hereinafter, 5G Above6 RF signal) of a 5G Above6 band (e.g., about 6 GHz to about 60 GHz) to be used in the second cellular network (294) (e.g., 5G network). Upon reception, the 5G Above6 RF signal can be acquired from the second cellular network (294) (e.g., 5G network) through an antenna (e.g., antenna (248)) and preprocessed through the third RFFE (236). The third RFIC (226) can convert the preprocessed 5G Above6 RF signal into a baseband signal so that it can be processed by the second communication processor (214). According to one embodiment, the third RFFE (236) can be formed as a part of the third RFIC (226).

[0074] The electronic device (101) may, according to one embodiment, include a fourth RFIC (228) separate from or at least as a part of the third RFIC (226). In this case, the fourth RFIC (228) may convert a baseband signal generated by the second communication processor (214) into an RF signal (hereinafter, referred to as an IF signal) of an intermediate frequency band (e.g., about 9 GHz to about 11 GHz) and then transmit the IF signal to the third RFIC (226). The third RFIC (226) may convert the IF signal into a 5G Above6 RF signal. Upon reception, the 5G Above6 RF signal may be received from the second cellular network (294) (e.g., a 5G network) via an antenna (e.g., antenna (248)) and converted into an IF signal by the third RFIC (226). The fourth RFIC (228) can convert the IF signal into a baseband signal so that the second communication processor (214) can process it.

[0075] According to one embodiment, the first RFIC (222) and the second RFIC (224) may be implemented as a single chip or at least a portion of a single package. According to one embodiment, when the first RFIC (222) and the second RFIC (224) in FIG. 2A or FIG. 2B are implemented as a single chip or a single package, they may be implemented as an integrated RFIC. In this case, the integrated RFIC may be connected to the first RFFE (232) and the second RFFE (234) to convert a baseband signal into a signal in a band supported by the first RFFE (232) and / or the second RFFE (234), and transmit the converted signal to one of the first RFFE (232) and the second RFFE (234). According to one embodiment, the first RFFE (232) and the second RFFE (234) may be implemented as at least a portion of a single chip or a single package. According to one embodiment, at least one antenna module of the first antenna module (242) or the second antenna module (244) may be omitted or combined with another antenna module to process RF signals of corresponding multiple bands.

[0076] In one embodiment, the third RFIC (226) and the antenna (248) may be disposed on the same substrate to form a third antenna module (246). For example, the wireless communication module (192) or the processor (120) may be disposed on the first substrate (e.g., the main PCB). In this case, the third RFIC (226) may be disposed on a portion (e.g., the bottom surface) of a second substrate (e.g., the sub PCB) separate from the first substrate, and the antenna (248) may be disposed on another portion (e.g., the top surface) to form the third antenna module (246). By disposing the third RFIC (226) and the antenna (248) on the same substrate, it is possible to reduce the length of the transmission line therebetween. This can reduce, for example, the loss (e.g., attenuation) of signals in a high-frequency band (e.g., about 6 GHz to about 60 GHz) used in 5G network communications by the transmission line. Due to this, the electronic device (101) can improve the quality or speed of communication with the second network (294) (e.g., 5G network).

[0077] In one embodiment, the antenna (248) may be formed as an antenna array including a plurality of antenna elements that may be used for beamforming. In this case, the third RFIC (226) may include a plurality of phase shifters (238) corresponding to the plurality of antenna elements, for example, as part of the third RFFE (236). Upon transmission, each of the plurality of phase shifters (238) may shift the phase of a 5G Above6 RF signal to be transmitted to an external source (e.g., a base station of a 5G network) of the electronic device (101) via its corresponding antenna element. Upon reception, each of the plurality of phase shifters (238) may shift the phase of a 5G Above6 RF signal received from the external source via its corresponding antenna element to the same or substantially the same phase. This enables transmission or reception via beamforming between the electronic device (101) and the external source.

[0078] The second cellular network (294) (e.g., a 5G network) may operate independently (e.g., Stand-Alone (SA)) or in connection with (e.g., Non-Stand Alone (NSA)) the first cellular network (292) (e.g., a legacy network). For example, the 5G network may only have an access network (e.g., a 5G radio access network (RAN) or next generation RAN (NG RAN)) and no core network (e.g., next generation core (NGC)). In this case, the electronic device (101) may access an external network (e.g., the Internet) under the control of the core network (e.g., evolved packed core (EPC)) of the legacy network after accessing the access network of the 5G network. Protocol information for communication with a legacy network (e.g., LTE protocol information) or protocol information for communication with a 5G network (e.g., New Radio (NR) protocol information) may be stored in the memory (230) and accessed by other components (e.g., the processor (120), the first communication processor (212), or the second communication processor (214)).

[0079] FIG. 2b is a block diagram (250) of an electronic device (101) for supporting legacy network communication and 5G network communication according to one embodiment.

[0080] Referring to FIG. 2B, the electronic device (101) (e.g., the electronic device (101) of FIG. 1A, FIG. 1B, or FIG. 1C) may include an integrated communication processor (260) (e.g., the communication processor (510) of FIG. 1C), a first RFIC (222), a second RFIC (224), a third RFIC (226), a fourth RFIC (228), a first RFFE (232), a second RFFE (234), a first antenna module (242), a second antenna module (244), a third antenna module (246), and / or antennas (248). The electronic device (101) may further include a processor (120) and a memory (130). The second network (199) may include a first cellular network (292) and a second cellular network (294).

[0081] The block diagram (250) of the electronic device (101) illustrated in FIG. 2b is different from the block diagram (200) of the electronic device (101) illustrated in FIG. 2a only in that the first communication processor (212) and the second communication processor (214) are implemented as an integrated communication processor (260), and the remaining components included in the block diagram (250) of the electronic device (101) can be implemented similarly or substantially identically to the components included in the block diagram (200) of the electronic device (101) illustrated in FIG. 2a, and thus a detailed description thereof will be omitted.

[0082] FIG. 3A illustrates a flowchart for explaining a method of operating an electronic device according to various embodiments.

[0083] The embodiment of Fig. 3a will be described with reference to Fig. 3b and Figs. 4a to 4e.

[0084] FIG. 3b is a diagram for explaining transmission power and SAR over time according to various embodiments.

[0085] Figure 4a shows a graph of transmission power over time according to various embodiments.

[0086] Figure 4b shows a graph of transmission power over time according to various embodiments.

[0087] Figure 4c shows a graph of transmission power over time according to various embodiments.

[0088] FIG. 4d shows a table of time-dependent transmission power according to various embodiments.

[0089] FIG. 4e illustrates a table of time-dependent transmission power according to various embodiments.

[0090] According to one embodiment, the electronic device (101) (e.g., the electronic device (101) of FIG. 1, FIG. 2A, or FIG. 2B) may back off the transmit power, a maximum transmit power level (MTPL), if, for example, the expected SAR based on the transmit power is expected to exceed a threshold. For example, when the occurrence of a specific event (e.g., a grip, a hot-spot, or a proxy) is identified, the electronic device (101) may transmit an RF signal at a back-off power corresponding to the event, or may transmit an RF signal at a transmit power set based on the back-off maximum transmit power level. The back-off operation may include an operation of lowering the transmit power to a certain level to reduce the amount of electromagnetic waves that may affect the human body.

[0091] In one embodiment, a technique may be used to back off the transmission power (or the maximum transmission power level) based on the total amount of SAR values ​​accumulated over a certain period of time (or the average value of SARs generated over a certain period of time). SARs that affect the human body instantaneously and / or SARs that affect the human body on average should also be taken into account, and accordingly, back off the transmission power (or the maximum transmission power level) may be performed when the total amount of accumulated SAR values ​​(or the average value of SARs generated over a certain period of time) satisfies a specified condition.

[0092] According to one embodiment, the electronic device (101) may perform a power control operation to back off the transmission power based on the total amount of accumulated SAR values. According to one embodiment, the “SAR back off operation” may include an operation to lower the transmission power of an antenna (e.g., the antenna module (197) of FIG. 1) of the electronic device (101) by a certain level. When controlling the SAR based on the accumulated SAR value, the electronic device (101) may control the transmission power based on an average value over a certain period of time, thereby controlling the accumulated SAR value during a time section corresponding to a time window not to exceed an SAR threshold value without performing frequent back off. When controlling the transmission power based on the average value of the SAR generated over a certain period of time, the electronic device (101) may relatively reduce the risk of transmission performance degradation due to frequent back off, compared to a power control method that performs back off by comparing an instantaneously generated SAR value (or, an instantaneous value) with the SAR threshold value.

[0093] In one embodiment, the total accumulated SAR for each of the plurality of antennas can be managed, and a maximum transmit power level can be set for each of the plurality of antennas accordingly.

[0094] According to one embodiment, the electronic device (101) (e.g., at least one of the processor (120), the first communication processor (212), the second communication processor (214), or the integrated communication processor (260)) may call (or read) a plurality of tables for transmission power corresponding to a plurality of points in time in operation 301. Before describing the embodiment associated with FIG. 3A, terms such as those in Table 1 are defined.

[0095] Table 1

[0096]

[0097] First, for an explanation of the table, reference will be made to FIGS. 4A to 4C. Referring first to FIG. 4A, a graph including transmission power for a plurality of time points (401 to 449) is illustrated. The cumulative SAR (cumulative SAR in Table 1) during a measurement time (Measurement time in Table 1), for example, a measurement time including 50 time points, may need to be maintained at a value less than or equal to a maximum cumulative SAR (Max cumulative SAR in Table 1). The electronic device (101) may determine the transmission power of an RF signal to be transmitted at the current time point (449) such that, in addition to the cumulative SAR at the current time point (449) and any past time points (409 to 448) (e.g., Average Time in Table 1), the cumulative SAR of additional nine future time points (not shown) (e.g., Remain Time in Table 1) remains less than or equal to the maximum cumulative SAR. In addition, the electronic device (101) can check the transmission powers (452) shifted by 1 from the transmission powers (451) at the current point in time (449) and any past points in time (409 to 448) of FIG. 4A, as in FIG. 4B. The fact that the point in time is shifted by 1 may mean that data at the most recent point in time (e.g., point 409 in FIG. 4A) is not reflected. The number of transmission powers (452) at the current point in time (449) and any past points in time (410 to 448) may be 40, which may be 1 less than the number of transmission powers (451) of FIG. 4A, which is 41. The electronic device (101) can determine the transmission power at the current point in time (449) so that the sum of the SAR by the transmission powers (452) and the predicted SAR at an additional 10 future points in time remains less than the maximum cumulative SAR. As in FIG. 4c, the electronic device (101) can check the transmission powers (453) at the current point in time (449) shifted by 25 from the transmission powers (451) and at any point in time (434 to 448) in the past.The number of transmission powers (453) may be 16, which may be 25 less than the number of transmission powers (451) of FIG. 4A, which is 41. The electronic device (101) may determine the transmission power at the current time point (449) so that the sum of the SAR by the transmission powers (453) and the predicted SAR at additional 34 future time points remains less than or equal to the maximum cumulative SAR. Although not shown, the electronic device (101) may manage a plurality of graphs shifted by one time point. The period for calculating the SAR may be, for example, the interval between the transmission powers in FIGS. 4A to 4C, as a measurement period (P) of Table 1. The electronic device (101) may calculate and / or manage T / P - 1 tables for a specific time point.

[0098] Below, a configuration for confirming the SAR predicted value will be described with reference to FIGS. 4d and 4e.

[0099] Referring to FIG. 4D, the electronic device (101) can check the k-th SAR table (460). The k-th SAR table (460) can include D1, which is a SAR accumulation value (461) at at least one past point in time, a maximum SAR value (462) (D2) at the current point in time, and a SAR prediction value (463) (D3) at at least one future point in time. Referring to the graph, the accumulation value of SAR corresponding to at least one past point in time (461) can be D1. D1, which is a SAR accumulation value (461) at at least one past point in time, can be checked based on the antenna setting. The number of at least one past point in time can be a number that is 1 less than the total number of points in time (e.g., 100) corresponding to the measurement time (e.g., 50 seconds) in the first table. N, which is the total number of points in time (e.g., 100), can be a result of dividing the measurement time by a sampling interval (or a shift interval). Accordingly, in the k-th table, the number of at least one past time point may be k smaller than the total number of time points. The electronic device (101) may check D1, which is an accumulated SAR value of Nk past time points (471). The electronic device (101) may use the maximum value (S1) of the SAR for the current time point (472). The maximum value (S1) of the SAR (e.g., normal max SAR in Table 1) may be a SAR value corresponding to the maximum transmission power specified in the electronic device (101) (e.g., normal max power in Table 1). In one embodiment, the SAR value immediately before the current time point (472) may be used for the current time point (472). In one embodiment, the SAR average value of the past time points (471) of the current time point (472) may be used for the current time point (472). The electronic device (101) can calculate the sum of the SAR values ​​(S2) (e.g., backoff max SAR in Table 1) for the backed-off transmission power (e.g., backoff max power in Table 1) for at least one future point in time (473).The electronic device (101) can check D3 as the cumulative SAR for at least one future time point (473). In the k-th table, the number of at least one future time point may be k-1. Accordingly, the electronic device (101) can check whether the sum of the SARs for N time points, which are composed of Nk past time points, 1 current time point, and k-1 future time points, D1+D2+D3, exceeds the maximum cumulative SAR. If it is confirmed to exceed, the electronic device (101) can back off the transmission power of the current time point. Referring to FIG. 4E, the electronic device (101) can also check the k+1-th table (480) as in FIG. 4E. The electronic device (101) can check, in the k+1th table (480), that the SAR cumulative value (481) of at least one past time point is D4, that the SAR maximum value (482) of the current time point is D2, and that the SAR predicted value (483) of at least one future time point is D5. The electronic device (101) can check whether the SAR cumulative value of D4 + D2 + D5 exceeds the maximum cumulative SAR. In the k+1th table, the number of at least one past time point (491) may be 1 less than the number of at least one past time point (471) in the kth table. In the k+1th table, the number of at least one future time point (493) may be 1 (494) greater than the number of at least one future time point (473) in the kth table.

[0100] According to one embodiment, in operation 303, the electronic device (101) may check the past SAR cumulative value, the current time point, and the SAR predicted value at the future time point for a plurality of tables corresponding to at least one future time point. The electronic device (101) may check the SAR cumulative value for the first table and a total of N-1 tables that are shifted by i time points (i is 1 or more and less than N-2) from the first table. In operation 305, the electronic device (101) may check whether there is a table in which the sum of the SAR cumulative value and the SAR predicted value exceeds a threshold. If there is a table exceeding the threshold (305-Yes), in operation 307, the electronic device (101) may back off any one of the transmission powers of at least a portion of the RF signal (or at least a portion of the maximum transmission power limit (MTPL)). Those skilled in the art will appreciate that the back-off of the transmission power in this document may be replaced with a back-off of the maximum transmission power level. If there is no table exceeding the threshold (305-No), the electronic device (101) may transmit an RF signal at the set transmission power in operation 309. In one embodiment of the present disclosure, the backoff of the maximum value of the transmission power may mean the backoff of the maximum value of the transmission power.

[0101] As described above, the electronic device (101) can determine the maximum value of the transmission power so that the average value of the SAR used during the measurement time does not exceed the Average SAR limit. Alternatively, the electronic device (101) can determine the maximum value of the transmission power so that the accumulated SAR during the measurement time does not exceed the Max accumulated SAR. The electronic device (101) can determine the maximum value of the maximum power for the next time interval every P hours. For example, the conditions for operating at the normal max power during the next P hours can be as follows.

[0102] Condition: Tx Room > Occurrence SAR when operating at normal max power for the next P (normal max SAR in Table 1) + Occurrence SAR when operating at backoff max power for (Remain Time - P) (backoff max SAR in Table 1) = PX normal max SAR + (Remain Time - P) X backoff max SAR

[0103] The Tx Room in the condition may be a value obtained by subtracting the accumulated SAR up to the present from the Max accumulated SAR. The (Remain Time - P) in the condition may be T - average time - P, and may be, for example, a future time as described in FIGS. 4a to 4e. P may mean a present time. Average time may mean a past time. Satisfaction of the condition may mean that even if the electronic device (101) sets the maximum transmission power of the normal max power for the P time, there is no table in which the accumulated SAR exceeds the Max accumulated SAR. Non-satisfaction of the condition may mean that if the electronic device (101) sets the maximum transmission power of the normal max power for the P time, there is a possibility that there is a table in which the accumulated SAR exceeds the Max accumulated SAR, in which case, the electronic device (101) may set the backoff max power to the maximum transmission power for the P time.

[0104] Table 2 shows examples of variables and conditions.

[0105] Table 2

[0106]

[0107] In the example in Table 2, it is explained that continuous use of normal max power with maximum transmit power is possible for 50 seconds, and backoff to backoff max power is required after 50 seconds. For example, let's assume that an RF signal is transmitted at normal max power of 23 dBm for 50 seconds, then an RF signal is transmitted at normal max power of 23 dBm for the next P (0.5 seconds), and then an RF signal is transmitted at backoff max power of 20 dBm for (Remain time - P) 49.5 seconds. In this case, Tx Room can be 50 mW / g, which is 150 mW / g - 50 X 2 mW / g. The SAR occurrence during P time can be 1 mW / g, which is 2 mW / g X 0.5 seconds. The SAR occurrence of (Remain time - P) can be 49.5 mW / g, which is 49.5 seconds X 1 mW / g. At this time, it can be confirmed that the accumulated SAR during P and (Remain time - P) exceeds the Tx room by 50.5 mW / g, which ultimately requires a backoff of the maximum value of the transmission power at the time point P. The above-described example will be described with reference to FIG. 3b, which illustrates a transmission power associated with one RAT (radio access technology). For example, referring to FIG. 3b, it can be confirmed that the maximum transmission power can be set to the normal max power (351) until A seconds (e.g., 50 seconds), but is backed off to the backoff max power (352) after A seconds. Depending on the backoff of the maximum value of the maximum transmission power, the slope of the second part (362) of the accumulated SAR can be formed smaller than the slope of the first part (361) of the accumulated SAR.The average SAR (331) before A second exceeds the average SAR limit (340), but at 100 seconds according to the backoff, it can be confirmed that the average SAR (332) is equal to the value of the average SAR limit (340). Fig. 5a illustrates a block diagram for explaining an exemplary electronic device according to various embodiments. The embodiment of Fig. 5a will be explained with reference to Fig. 5b. Fig. 5b is a diagram for explaining an exemplary electronic device according to various embodiments.

[0108] According to one embodiment, the communication processor (501) (e.g., at least one of the first communication processor (212), the second communication processor (214), or the integrated communication processor (260)) can transmit a baseband signal to, and / or receive a baseband signal from, an RFIC (503) (e.g., at least one of the first RFIC (222), the second RFIC (224), the third RFIC (226), or the fourth RFIC (228)). The RFIC (503) can process at least one RF signal associated with at least one RF path. Here, the RF path can include, for example, at least one hardware for transmitting an RF signal (e.g., at least one of an RFIC, an RFFE, or an antenna). For example, the RFIC (503) can receive at least one baseband signal from the communication processor (501) and can generate at least one or more RF signals. Although RFIC (503) is illustrated as one module in the example of FIG. 5a, this is exemplary and those skilled in the art will understand that there is no limit to the number of modules in which RFIC (503) is implemented.

[0109] According to one embodiment, the RFIC (503) may provide at least one RF signal to the first RFFE (505) and / or the second RFFE (507). The first RFFE (505) and / or the second RFFE (507) may process (e.g., amplify) the provided RF signal. The communication processor (501) may determine the amplification degree of the RFFEs (505, 507) based on the maximum transmit power level and / or transmit power determined as described above. Although not shown, the amplification degree of the RFFEs (505, 507) may be controlled based on an average power tracking (APT) module and / or an envelope tracking (ET) module. According to various embodiments, a single RFFE may perform processing of a plurality of RF signals.

[0110] According to one embodiment, the first RFFE (505) may be connected to a single pole double throw (SPDT) switch (509), and an output terminal of the SPDT switch (509) may be connected to a switch (511). The switch (511) may be configured to selectively connect the output terminal of the SPDT switch (509) to either the first antenna (521) or the second antenna (522). The second RFFE (507) may be connected to a switch (513). The switch (513) may be configured to selectively connect the output terminal of the second RFFE (507) to either the SPDT switch (509), the third antenna (523), or the fourth antenna (524). Meanwhile, each of the antennas (521, 522, 523, 524) may be disposed inside the housing, and / or may be disposed on a part of the housing. For example, at least some of the antennas (521, 522, 523, 524) may be disposed on an outer surface of the housing of the electronic device (101), but this is not limited thereto. In one example, as shown in FIG. 5b, the antennas (521, 522) may be disposed on one side (e.g., the bottom) of the housing of the electronic device (101), and the antennas (523, 524) may be disposed on the other side (e.g., the top) of the housing of the electronic device (101), but this is exemplary.

[0111] For example, whether a violation of a restriction (e.g., a SAR restriction) should be determined based on the sum of the RF exposures (e.g., SAR and / or PD) generated by multiple antennas, or whether each RF exposure generated by multiple antennas should be determined independently to violate the restriction, can be determined by the following mathematical equation 1.

[0112] [Mathematical Formula 1]

[0113]

[0114] In Equation 1, SAR1 is the SAR generated by one antenna, and SAR2 is the SAR generated by another antenna, and the unit may be, for example, W / kg. R for the sum of various SARs may be, for example, as shown in Table 3. Meanwhile, the numbers 1.5 and 0.04 in Equation 1 are merely exemplary and are not limiting.

[0115] Table 3

[0116]

[0117] For example, let's assume that the sum of SAR generated from two antennas is 3.2 W / Kg. Meanwhile, since both antennas are arranged on the top of the electronic device (101), the separation distance may be less than 143 mm. In this case, in order to determine whether the electronic device (101) violates the instantaneous SAR regulation or the cumulative SAR regulation, it may be necessary to determine whether the sum of SARs generated from the two antennas violates the SAR regulation. In order to comply with the SAR regulation, for example, the electronic device (101) may perform a backoff associated with the transmission power of the RF signal based on one of the two antennas. Meanwhile, when an RF signal of FR (frequency range) 2 is transmitted, PD (power density) may be used instead of SAR. For example, when considering SAR and PD simultaneously, the sum of the SAR divided by the maximum SAR and the PD divided by the maximum PD can be determined as the sum of RF exposure, and the minimum separation distance corresponding to the sum of RF exposure can be determined, as will be understood by those skilled in the art. The RF exposure in the present disclosure can mean, for example, SAR, PD, TRP (total radiated power), and / or EIRP (effective isotropic radiated power). The RF exposure can be called, for example, RF radiation or RF intensity, and the names thereof are not limited, as will be understood by those skilled in the art. For example, there is no limitation on the reference points of each antenna for defining the distance between the antennas. For example, the reference point can be set in various ways, such as the point where the maximum RF is generated among the antennas, the center of mass of the antenna, or a point at one end of the antenna, and there is no limitation on the setting method.For example, the separation distance between the two antennas may be 143 mm or more, for example, when each of the two antennas is positioned at the bottom and top of the electronic device (101). In this case, in order to determine whether the electronic device (101) violates the cumulative SAR regulations, it may be necessary to determine whether the sum of the SARs generated from either of the two antennas violates the SAR regulations and / or whether the sum of the SARs generated from the other of the two antennas violates the SAR regulations.

[0118] As described above, antennas for which the sum of SARs is considered to determine whether SAR regulations are violated because they satisfy mathematical expression 1 can be expressed as being included in the same antenna group. If the distance between antennas is relatively small (e.g., smaller than the distance related to mathematical expression 1), they can be included in the same antenna group. In addition, antennas for which independent SARs, rather than the sum of SARs, are considered to determine whether SAR regulations are violated because mathematical expression 1 is not satisfied can be expressed as being included in different antenna groups. If the distance between antennas is relatively large (e.g., larger than the distance related to mathematical expression 1), they can be included in different antenna groups.

[0119] In one embodiment, the antenna (523) located at the top of the electronic device (101) and the antenna (522) located at the bottom may be included in different antenna groups, respectively. Accordingly, the electronic device (101) may independently manage whether to back off based on the RF exposure amount based on the antenna (523) and whether to back off based on the RF exposure amount based on the antenna (522). For example, the electronic device (101) may set the transmitting antenna to the antenna (522) at a first time point. The electronic device (101) may determine whether to back off based on the RF exposure amount associated with the antenna group to which the antenna (522) belongs (e.g., accumulated RF exposure amount at past time points). If the condition for changing the transmitting antenna is satisfied at a second time point, the electronic device (101) may change the transmitting antenna from the antenna (522) to the antenna (523). The electronic device (101) may determine whether to back off after the second time point based on the RF exposure amount (e.g., accumulated RF exposure amount at past time points) associated with the antenna group to which the antenna (523) belongs. Meanwhile, changing the transmit antenna may also be referred to as transmit antenna switching or transmit antenna hopping. For example, changing the transmit antenna may be performed based on the control of a switch (e.g., 509, 511, and / or 513) and / or a change of an RF component (e.g., a power amplifier (PA)), and there is no limitation on the method. For example, when the communication processor (501) determines that the transmit antenna is to be changed, the communication processor (501) may control at least some of the RF circuits (e.g., RFIC (503), RFFEs (505, 507), and / or switches (e.g., 509, 511, and / or 513)).

[0120] In one embodiment, since the distance between antenna (562) and antenna (523) does not satisfy Equation 1, antenna (562) and antenna (523) may be included in the same antenna group. Since the distance between antenna (562) and antenna (522) does not satisfy Equation 1, antenna (562) and antenna (522) may be included in the same antenna group. Since antenna (562) is included in the antenna group of antenna (522) and also in the antenna group of antenna (523), antenna (562) may be referred to as a shared antenna.

[0121] In one embodiment, since the distance between antenna (561) and antenna (521) does not satisfy Equation 1, antenna (561) and antenna (521) may be included in the same antenna group. Since the distance between antenna (561) and antenna (524) does not satisfy Equation 1, antenna (561) and antenna (524) may be included in the same antenna group. Since antenna (561) is included in the antenna group of antenna (524) and also in the antenna group of antenna (521), antenna (561) may be referred to as a shared antenna.

[0122] FIG. 6 illustrates a flowchart for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0123] The embodiment of FIG. 6 will be described with reference to FIG. 7, FIG. 8a, FIG. 8b, and FIG. 9.

[0124] FIG. 7 is a diagram for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0125] FIG. 8A is a diagram for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0126] FIG. 8b is a diagram for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0127] FIG. 9 is a diagram for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0128] According to one embodiment, the electronic device (101) (e.g., the communication processor (501)) may establish a connection with an external device (e.g., at least one of the electronic device (102), the electronic device (104), or the server (108) of FIG. 1) in operation 601. In one embodiment, the electronic device (101) may establish a connection with the external device via a communication circuit (e.g., the communication module (190)). The external device may include a base station, a device constituting a core network, or an external electronic device supporting wireless communication. The electronic device (101) may establish a wireless communication connection with the external device via, for example, a cellular network (e.g., the second network (199)), but is not limited thereto.

[0129] In one embodiment, in operation 603, the electronic device (101) may transmit a signal to an external device based on setting a first maximum transmit power that is higher than a maximum transmit power limit value during a first period portion of a first time period in a first transmission mode, and may transmit a signal to the external device based on setting a second maximum transmit power that is lower than the maximum transmit power limit value during a second period portion of the first time period. The first transmission mode may be referred to as a “normal mode” or a “default mode.” The electronic device (101) may set a maximum value (pMax) of the transmission power such that a SAR value due to radiation of a radio frequency (RF) signal does not exceed a set SAR threshold value (e.g., a total SAR amount or an average SAR value during a set time window). The SAR threshold value may be set corresponding to an antenna group, and the SAR threshold value corresponding to an antenna group has been described in FIG. 5B, and a description thereof may not be repeated herein. In one embodiment, the electronic device (101) may operate a TAS function. The TAS function may be a function that controls the maximum transmission power value of the electronic device (101) so that the sum (or average value) of SAR values ​​during a set time period does not exceed a SAR threshold value.Referring to the graph (710) for the transmission power of the RF signal in the first transmission mode of FIG. 7, the electronic device (101) may transmit a signal to the external device based on setting a first maximum transmission power (711) that is higher than a maximum transmission power limit value (pLimit) set based on the time averaged SAR (“TAS”) function operation during a first period portion (721) of the first time period (720) set based on the time averaged SAR (“TAS”) function operation in the first transmission mode, and may transmit a signal to the external device based on setting a second maximum transmission power (715) that is lower than the maximum transmission power limit value (pLimit) during a second period portion (723) of the first time period (720). In one embodiment, the time period based on the time averaged SAR (“TAS”) function operation may be set differently depending on the type of processor or the manufacturer of the processor. For example, a time interval based on the TAS setting (e.g., TAS sliding window size) can be set within a range of several seconds to tens of seconds, such as 30 seconds, 60 seconds, or 120 seconds. The elapsed time during the first time interval can be 60 seconds, but is not limited thereto. The electronic device (101) can set a first maximum transmission power (711) such that, during a first interval portion (721) of the first time interval (720), a transmission power higher than a maximum transmission power limit value is output by the antenna (e.g., at least one of the antenna (521), the antenna (522), the antenna (523), the antenna (524), the antenna (561), or the antenna (562)). The first maximum transmission power (711) can be set to, for example, a maximum transmittable power (Pc_max) allowed for the electronic device (101). The maximum transmittable power can be set corresponding to the power class of the electronic device (101).For example, for power class 3 (PC3), the maximum transmittable power may be set to 23 dBm. For power class 2 (PC2), the maximum transmittable power may be set to 26 dBm. The first maximum transmit power (711) may also be referred to as being “0 dB backoff below the maximum transmittable power limit.” Referring to a graph (730) illustrating a block error rate (“BLER”) for an RF signal of FIG. 7, a relatively low block error rate (731) may be detected during the first period portion (721) because the first maximum transmittable power (711) is set to the maximum transmittable power. The maximum transmittable power limit may be set to, for example, 3 dB lower than the maximum transmittable power, without limitation. The electronic device (101) may set the second maximum transmission power (715) so that a transmission power lower than the maximum transmission power limit value is output by the antenna during the second period portion (723) of the first time period (720). The second maximum transmission power (715) may be set to, for example, the set backoff maximum power (pBackoff). The backoff maximum power may be set to, for example, 3 dB lower than the maximum transmission power limit value. Referring to FIG. 7, since the second maximum transmission power (715) is set to the backoff maximum power during the second period portion (723), a relatively higher block error rate (733) may be detected than that during the first period portion (721). In the first transmission mode, the first maximum transmission power (711) may be set to a level corresponding to the maximum transmittable power (Pc_max) by the TPC (Tx power control) of the base station (or network). The electronic device (101) can instantaneously radiate an RF signal having a high transmission power based on setting the first maximum transmission power (711).When there are relatively many uplink data (UL data) packets, the transmission interval of the first maximum transmission power (711) may become relatively long. The electronic device (101) may set the second maximum transmission power (715) below the maximum transmission power limit value in order to maintain the time-averaged SAR value below the SAR specification. In the first transmission mode, even when transmitting an RF signal at the backoff maximum power (pBackoff), a BLER (733) at a level that allows normal transmission of the uplink signal may be detected.

[0130] In one embodiment, the electronic device (101) may set the first maximum transmission power (711), the second maximum transmission power (715), the first interval portion (721), and the second interval portion (723) such that, in the first transmission mode, the product (713) of the difference between the first maximum transmission power (711) and the maximum transmission power limit value (pLimit) and the first time elapsed during the first interval portion (721) is substantially equal to the product (717) of the difference between the maximum transmission power limit value (pLimit) and the second maximum transmission power (715) and the second time elapsed during the second interval portion (723). The electronic device (101) may change the maximum transmission power based on the first maximum transmission power (711), the second maximum transmission power (715), the first interval portion (721), and the second interval portion (723), thereby maintaining the time-averaged SAR value less than the SAR threshold.

[0131] In one embodiment, in operation 605, the electronic device (101) may switch from the first transmission mode to the second transmission mode based on confirming the occurrence of a switching event. The electronic device (101) may confirm the occurrence of the switching event based on information associated with a channel condition, a data size, and / or a specific absorption rate budget when transmitting a signal to an external device. The information associated with the channel condition may include at least one of a BLER, a reference signal received power (RSRP), a reference signal received quality (RSRQ), or a reference signal strength indicator (RSSI). The electronic device (101) may confirm the size of data required to be transmitted based on confirming the buffer size. The information associated with the specific absorption rate budget may include a SAR budget that is determined by subtracting an accumulated SAR value confirmed during a time interval corresponding to an SAR window from the total threshold SAR values ​​assigned to the antenna group. Information associated with the specific absorption rate budget may include a TAS budget, which limits the average SAR value observed during a time interval corresponding to the SAR window among the threshold TAS values ​​assigned to the antenna group. The SAR budget or TAS budget may include a value in the range of 0 to 100, for example.

[0132] In one embodiment, the electronic device (101) may determine the occurrence of a switching event when the channel state is a first state. Conditions for the first state may include, for example, that the received signal strength is less than a threshold signal strength and that the buffer size exceeds a threshold buffer size. The electronic device (101) may determine that the channel state is the first state, for example, when the received signal strength is less than a threshold signal strength and the data size required to be transmitted exceeds a first threshold buffer size. In the first state, the uplink (UL) BLER may be detected to exceed the first threshold BLER and be less than a second threshold BLER. The electronic device (101) may determine the occurrence of a switching event based on determining that the SAR budget is less than the first threshold budget when the channel state is the first state. The electronic device (101) may determine, for example, an event for switching to Mode A (or Mode A-1).

[0133] In one embodiment, the electronic device (101) can determine the occurrence of a switching event when the channel state is the second state. Conditions for the second state may include, for example, that the received signal strength is less than a threshold signal strength and that the buffer size exceeds a second threshold buffer size that is less than the first threshold buffer size. The electronic device (101) can determine that the channel state is the second state when the data size required to be transmitted is relatively smaller than the data size condition for the first state. In the second state, the UL BLER may be detected to exceed the first threshold BLER and be less than the second threshold BLER. The electronic device (101) can determine the occurrence of a switching event based on determining that the SAR budget is less than the first threshold budget when the channel state is the second state. The electronic device (101) can determine, for example, an event for switching to Mode A (or Mode A-2). The electronic device (101) can dynamically set the maximum transmission power of an RF signal based on information indicating channel conditions (e.g., received signal strength and BLER) and a buffer size. The threshold buffer size for dynamically setting the maximum transmission power may vary depending on the embodiment.

[0134] In one embodiment, the electronic device (101) may determine the occurrence of a switching event when the channel state is the third state. Conditions for the third state may include, for example, that the received signal strength is less than a threshold signal strength and that the buffer size exceeds a threshold buffer size (e.g., a second threshold buffer size). The value of the threshold buffer size for the third state may be an initial condition for changing the operation mode of the electronic device (101) from the normal mode (e.g., changing to mode A or mode B), and the value of the threshold buffer size may be changed depending on the embodiment. The electronic device (101) may determine that the channel state is the third state when the size of data required to be transmitted is relatively large and a relatively high block error rate is detected. The channel state of the third state may be worse than the channel state of the first state or the second state. In the second state, a UL BLER exceeding the second threshold BLER may be detected. The electronic device (101) can determine the occurrence of a switching event based on determining that the SAR budget is less than a second threshold budget that is smaller than a first threshold budget when the channel state is the third state. The electronic device (101) can determine an event for switching to Mode B, for example.

[0135] In one embodiment, at operation 607, the electronic device (101) may transmit a signal to the external device based on setting a third maximum transmission power equal to or lower than the first maximum transmission power during a third period of the second time interval in the second transmission mode, and may transmit a signal to the external device based on setting a fourth maximum transmission power different from the second maximum transmission power during a fourth period of the second time interval. The elapsed time during the second time interval may be, for example, 60 seconds, but is not limited thereto. The electronic device (101) may transmit a signal to the external device based on setting a third maximum transmission power equal to or lower than the first maximum transmission power during a third period of the second time interval set based on the operation of the SAR function, in the second transmission mode, and may transmit a signal to the external device based on setting a fourth maximum transmission power different from the second maximum transmission power during a fourth period of the second time interval. The electronic device (101) may set a maximum transmission power (e.g., a third maximum transmission power or a fourth maximum transmission power) to improve transmission performance within a range that satisfies the SAR standard, based on parameters (e.g., parameters related to BLER and reception signal strength) confirmed based on a signal received through an antenna set as a receiving antenna. The operation of setting the maximum transmission power may include an operation of setting a variable value of the maximum transmission power (pMax) or a variable value of the backoff maximum power (pBackoff).In one embodiment, the electronic device (101) may set the third maximum transmission power, the fourth maximum transmission power, the third interval portion, and the fourth interval portion such that, in the second transmission mode, a product of a difference between the third maximum transmission power and the maximum transmission power limit value (pLimit) and a third time elapsed during the third interval portion is substantially equal to a product of a difference between the maximum transmission power limit value (pLimit) and the fourth maximum transmission power and a fourth time elapsed during the fourth interval portion.

[0136] In one embodiment, the electronic device (101) can switch to Mode A (e.g., Mode A-1 or Mode A-2) when the channel status is the first state or the second state based on the data size corresponding to the received signal strength (e.g., RSRP) and the buffer status. If the transmission of uplink data from the electronic device (101) to the network (e.g., a base station) fails, data may accumulate in the retransmission buffer of the electronic device (101). The electronic device (101) can check the buffer size of the data that requires uplink transmission. The electronic device (101) can enter Mode A, for example, based on the RSRP being less than -100 dBm and the buffer size exceeding a threshold buffer size (e.g., 10 MB (megabyte)). In one embodiment, the operation of checking whether the buffer size exceeds the threshold buffer size can be replaced by the operation of checking whether there is data that requires uplink transmission. The electronic device (101) may enter Mode A based on determining that the received signal strength is less than the threshold signal strength and that there is uplink data, regardless of whether the buffer size exceeds the threshold buffer size. The electronic device (101) may operate in Normal Mode based on that the conditions including the received signal strength and the buffer size for entering Mode A are not satisfied. For example, the electronic device (101) may operate in Normal Mode in FIG. 7 based on that the received signal strength exceeds the threshold signal strength or the buffer size is less than the threshold buffer size. The electronic device (101) may operate in Mode A-1 or Mode A-2 based on that the conditions including the received signal strength and the buffer size for entering Mode A are satisfied.

[0137] In one embodiment, referring to FIG. 8A, the electronic device (101) may switch to mode A-1 at a point in time (831) when the BLER exceeds a first threshold BLER (Thr_bler1) in the BLER graph (830). Referring to the maximum transmission power graph (810), the electronic device (101) may transmit a signal to an external device based on setting a third maximum transmission power (813) to be lower than a maximum transmission power limit value (pLimit) and higher than a second maximum transmission power (e.g., the second maximum transmission power (715)) during a third interval portion (851) of a second time interval (820) when the channel state is the first state, and may transmit a signal to the external device based on setting a fourth maximum transmission power (815) to be equal to or higher than the maximum transmission power limit value during a fourth interval portion (823). The electronic device (101) may preemptively set the third maximum transmission power (813) to a value lower than the maximum transmission power limit value (pLimit) based on the fact that high BLER may occur due to operating at the backoff maximum power (pBackoff) when the received signal strength is lower than the threshold signal strength. For example, when the channel state is the first state, the electronic device (101) may set the third maximum transmission power (813) to be 4 dB lower than the maximum transmittable power (Pc_max). In order to compensate for the SAR value generated by setting the maximum transmission power to the maximum transmittable power (811 or Pc_max), the electronic device (101) may set the third maximum transmission power (813) to be lower than the maximum transmit power limit value (pLimit). When the channel state is the first state, the electronic device (101) may, for example, set the fourth maximum transmission power (815) to be equal to the maximum transmit power limit value (pLimit).The electronic device (101) can maintain the time-averaged SAR value below the threshold TAS value set in the SAR standard based on setting the fourth maximum transmission power (815) equal to the maximum transmission power limit value. When the channel state is the first state, the electronic device (101) can set the third maximum transmission power (813) to be 1 dB lower than the maximum transmission power limit value (pLimit) and can set the fourth maximum transmission power (815) to be 3 dB lower than the maximum transmittable power (Pc_max). When the channel state is the first state, the electronic device (101) can set the third maximum transmission power (813) to 19 dBm and can set the fourth maximum transmission power (815) to 20 dBm, and there is no limitation on specific values. The electronic device (101), when the channel state is the first state, may set the maximum value of the maximum transmission power to be lower than the maximum transmittable power (Pc_max) and may set the minimum value of the maximum transmission power to be higher than the maximum backoff power (pBackoff) of the normal mode. When the size of data required to be transmitted is relatively large, the electronic device (101) may attempt to transmit data for a relatively long time period (820) based on setting the maximum transmission power to be lower than the maximum transmission power limit value.

[0138] In one embodiment, referring to FIG. 8B, the electronic device (101) may switch to mode A-2 at a point (861) in the BLER graph (860) when the BLER exceeds a first threshold BLER (Thr_bler1). Referring to the maximum transmission power graph (840), when the channel state is the second state, the electronic device (101) may transmit a signal to an external device based on setting the third maximum transmission power (843) to be between the first maximum transmission power (e.g., the first maximum transmission power (711) or the maximum transmittable power (Pc_max) of the normal mode) and the maximum transmission power limit value (pLimit) during a third period portion (851) of the second time period (850), and may transmit a signal to the external device based on setting the fourth maximum transmission power (845) to be equal to or higher than the second maximum transmission power (e.g., the second maximum transmission power (715) or the maximum backoff power (pBackoff) of the normal mode) during a fourth period portion (853). When the channel state is the second state, the electronic device (101) may set the third maximum transmission power (843) to be 2 dB lower than the maximum transmittable power (Pc_max) of the electronic device (101), and may set the fourth maximum transmission power (845) to be 3 dB lower than the maximum transmission power limit value (pLimit), for example. When the channel state is the second state, the electronic device (101) may set the third maximum transmission power (843) to be 21 dBm, and may set the fourth maximum transmission power (845) to be 17 dBm, for example, and there is no limitation on the specific numerical values. The electronic device (101) may preemptively set the third maximum transmission power (843) to a value lower than the maximum transmission power limit value, based on the fact that a high BLER may occur due to operating at the backoff maximum power (pBackoff) when the received signal strength is lower than the threshold signal strength.For example, when the size of data required to be transmitted is relatively large, the electronic device (101) may set the third maximum transmission power (843) higher than the maximum transmission power limit value (pLimit). In order to compensate for the SAR value generated by setting the maximum transmission power to the maximum transmittable power (841 or Pc_max) before entering Mode A-2 and setting the third maximum transmission power (843) after entering Mode A-2, the electronic device (101) may set the fourth maximum transmission power (845) lower than the maximum transmission power limit value (pLimit). When the channel state continues in the second state, the electronic device (101) may maintain the time-averaged SAR value below the threshold TAS value set in the SAR standard based on setting the fourth maximum transmission power (845) lower than the maximum transmission power limit value (pLimit). The electronic device (101) may set the maximum value of the maximum transmit power in Mode A-2 to be lower than the maximum transmittable power (Pc_max) in order to maintain the time-averaged SAR value below the threshold TAS value set in the SAR standard and to maintain transmission performance for a relatively long time period (851), as in Mode A-1. By setting the maximum value of the maximum transmit power in Mode A-2 to be higher than the maximum transmit power limit value (pLimit), the electronic device (101) may improve transmission performance even in a weak electric field environment compared to the normal mode when maintenance of data transmission performance is relatively important or when the size of data required to be transmitted is relatively small. Cases when maintenance of data transmission performance is relatively important may include, for example, a case where a call service is running. The electronic device (101) may switch to Mode A-2 based on confirming that the call service is running. The electronic device (101) may also switch to Mode A-2 in a mobile environment where the channel environment changes rapidly.For example, the electronic device (101) may switch to Mode A-2 if it is expected that the RSRP will improve beyond a threshold signal strength based on determining a mobility parameter, such as a change in RSRP. The electronic device (101) may switch to Normal mode based on determining that the RSRP exceeds the threshold signal strength while an uplink signal having a power higher than a maximum transmit power limit value (pLimit) is transmitted during the third period portion (851). The electronic device (101) may maintain transmission performance by not transmitting an uplink signal and switching to Normal mode based on determining a fourth maximum transmit power (845) for a long time period based on determining a mobility parameter.

[0139] In one embodiment, referring to FIG. 9, in the BLER graph (930), the mode B can be switched at a point in time (931) when the BLER exceeds the second threshold BLER (Thr_bler2). Referring to the maximum transmission power graph (910), the electronic device (101) can transmit a signal to an external device based on setting a third maximum transmission power (915) equal to a first maximum transmission power (e.g., the first maximum transmission power (711) or the maximum transmittable power (Pc_max) of the normal mode) during a third period of the second time period (920) when the channel state is a third state, and can transmit a signal to the external device based on setting a fourth maximum transmission power (913) lower than the second maximum transmission power (e.g., the second maximum transmission power (715) or the maximum backoff power (pBackoff) of the normal mode) during a fourth period. When the channel state is the third state, the electronic device (101) may set, for example, the third maximum transmission power (915) to be equal to the maximum transmittable power (Pc_max) of the electronic device (101) and may set the fourth maximum transmission power (913) to be 20 dB lower than the maximum transmission power limit value (pLimit). When the channel state is the third state, the electronic device (101) may set the third maximum transmission power (915) to 23 dBm and the fourth maximum transmission power (913) to 0 dBm, and there is no limitation on the specific numerical values. In one embodiment, the electronic device (101) may set the fourth maximum transmission power (913) to a set minimum value (e.g., 0 dBm) based on the fact that high BLER may occur due to operating at the backoff maximum power (pBackoff) when the received signal strength is less than the threshold signal strength. The electronic device (101) can save power (e.g., SAR budget) for transmitting an uplink signal based on setting the fourth maximum transmission power (913) to a minimum value during the backoff period (921).While the electronic device (101) transmits a signal based on setting the fourth maximum transmit power (913), a very large value of BLER (933) may be detected. The electronic device (101) may set the third maximum transmit power (915) to the maximum transmittable power (Pc_max) during a time period (923) corresponding to the saved SAR budget. While the electronic device (101) transmits a signal based on setting the third maximum transmit power (915), a reduced BLER (935) may be detected compared to the backoff period (921), and the probability of successful uplink signal transmission may increase. The electronic device (101) sets the fourth maximum transmission power (913) and the third maximum transmission power (915) based on a period including a backoff period (921) and a time period (923) corresponding to a saved SAR budget, thereby increasing the possibility that an uplink signal (or Tx signal) having a maximum transmittable power (Pc_max) will reach a base station in a deteriorated channel state and reducing the risk of transmission delay.

[0140] In one embodiment, the electronic device (101) may set a backoff interval (921) and a time interval (923) corresponding to the saved SAR budget so that the average power value in terms of power units (e.g., Watts) does not exceed a maximum transmission power limit value (pLimit). The electronic device (101) may set a backoff time corresponding to the backoff interval (921) and a max time corresponding to the time interval (923) based on Equation 2.

[0141] [Equation 2]

[0142] {(pLimit[Watt])-(pBackoff[Watt])} * (Backoff_time[Sec]) = {(pMax[Watt])-(pLimit[Watt])} * (Max_time[Sec])

[0143] For example, if the maximum transmission power limit value is set to 20 dBm, the power in watts corresponding to the maximum transmission power limit value may be 100 mW. If the third maximum transmission power (915) is set to 23 dBm, the power in watts corresponding to the third maximum transmission power (915) may be 200 mW. If the fourth maximum transmission power (913) is set to 0 dBm, the power in watts corresponding to the fourth maximum transmission power (913) may be 0 mW. Referring to Equation 2, the backoff time and the max time may be set to be substantially the same. For example, the backoff time and the max time may each be set to 1 second (sec), and there is no limitation on the specific numerical values. If the backoff time is set to 1 second, a SAR budget corresponding to 0.1 J [Joule] can be secured during the backoff period (921). The electronic device (101) may transmit an uplink signal having a third maximum transmission power (915) during a time interval (923) corresponding to the max time after saving the SAR budget during the backoff period (921) based on setting the backoff time and the max time. The electronic device (101) may periodically switch between the fourth maximum transmission power (913) and the third maximum transmission power (915), for example, until the second time interval (920) corresponding to the SAR time window has elapsed.

[0144] In one embodiment, the electronic device (101) may secure an opportunity to transmit an uplink signal at maximum transmit power in an environment where the SAR budget is low based on operating in any one of Mode A-1, Mode A-2, or Mode B when the received signal strength is less than a threshold signal strength and the data size exceeds a threshold buffer size. The electronic device (101) may reduce the risk of radio link failure (RLF) or data outage by changing the maximum transmit power based on checking the channel condition, the data size, and parameters associated with the SAR budget.

[0145] FIG. 10 is a diagram for explaining an increase in UL BLER due to setting of a limit value of the transmission power of an electronic device according to a comparative example.

[0146] In a comparative example, referring to FIG. 10, the electronic device (101) may transmit an uplink signal with a maximum transmittable power (1011) even though the received signal strength is below a threshold signal strength. If the electronic device (101) continues to transmit the uplink signal with the maximum transmittable power (1011), the SAR usage may rapidly increase and the SAR budget may decrease. At a point in time (1020) when the SAR budget is no longer secured due to the period (1010) in which the uplink signal with the maximum transmittable power (1011) was transmitted, the electronic device (101) may transmit an uplink signal with a backoff power (1031). If the electronic device (101) continues to transmit the uplink signal with the backoff power (1031) for a relatively long time period (1030), retransmission may occur repeatedly. An RLF may occur at a specific point in time (1040) due to a failure in uplink signal transmission. For example, if an uplink signal is transmitted at the maximum transmittable power (e.g., 23 dBm) for 20 seconds, the SAR usage may increase rapidly. If the SAR usage exceeds the configured SAR threshold, the maximum transmit power may be reduced to the backoff power (e.g., 17 dBm) for 40 seconds. If an uplink signal at the backoff power is repeatedly transmitted, data pauses or data dropouts may occur due to poor transmission performance.

[0147] FIG. 11 is a diagram for explaining a reduction in UL BLER due to setting of a limit value of a transmission power of an electronic device according to one embodiment.

[0148] In one embodiment, the electronic device (101) may secure an opportunity to transmit an uplink signal with a maximum transmittable power (Pc_max) based on operating in Mode B when the received signal strength is below a threshold signal strength and the SAR budget is insufficient. By periodically transmitting an uplink signal with a maximum transmittable power, the electronic device (101) may reduce the risk of data transmission failure or interruption. When the electronic device (101) transmits an uplink signal with a maximum transmittable power, a reduced UL BLER (1120) may be detected.

[0149] FIG. 12 illustrates a flowchart for explaining a method for setting a limit value of a transmission power of an electronic device according to one embodiment.

[0150] The embodiment of Fig. 12 will be described with reference to Figs. 13 and 14.

[0151] FIG. 13 is a drawing for explaining the relative position of an electronic device to a base station according to one embodiment.

[0152] FIG. 14 is a drawing for explaining a change in the operation mode of an electronic device according to one embodiment.

[0153] According to one embodiment, the electronic device (101) (e.g., the communication processor (501)) may establish a connection with an external device (e.g., at least one of the electronic device (102), the electronic device (104), or the server (108) of FIG. 1) in operation 1201. In one embodiment, the electronic device (101) may determine whether the received signal strength is less than a threshold signal strength and whether the buffer size exceeds a threshold buffer size. Based on determining that the received signal strength is greater than or equal to the threshold signal strength or the buffer size is less than or equal to the threshold buffer size (operation 1201 - No), the electronic device (101) may operate in normal mode in operation 1203. Referring to FIG. 13, when the electronic device (101) is located within area A (1320) based on the distance from the base station (1310), the electronic device (101) may operate in normal mode. Referring to Figure 14, the SAR budget may be reduced by operating at the maximum transmittable power in the normal mode section (1410).

[0154] In one embodiment, based on determining that the received signal strength is less than the threshold signal strength and that the buffer size is greater than the threshold buffer size (Operation 1201 - Yes), the electronic device (101) may determine, in Operation 1205, whether the SAR budget is less than a first threshold budget (e.g., Thr-budget1 of FIG. 14) and whether the UL BLER is greater than the first threshold BLER (e.g., Thr_bler1 of FIG. 14) and less than a second threshold BLER (e.g., Thr_bler2 of FIG. 14). Based on determining that the SAR budget is less than the first threshold budget and the UL BLER is greater than the first threshold BLER and less than the second threshold BLER (Operation 1205 - Yes), the electronic device (101) may operate in Mode A in Operation 1207. Referring to FIG. 13, when the electronic device (101) is located within region B (1330), it may operate in mode A. Referring to FIG. 14, the UL BLER may increase due to a decrease in the maximum transmission power in the mode A section (1420).

[0155] In one embodiment, based on determining that the SAR budget is greater than or equal to the first threshold budget, or that the UL BLER is less than or equal to the first threshold BLER, or that the UL BLER is greater than or equal to the second threshold BLER (Operation 1205 - No), the electronic device (101) may determine, in Operation 1209, whether the SAR budget is less than the second threshold budget and the UL BLER exceeds the second threshold BLER. Based on determining that the SAR budget is greater than or equal to the second threshold budget, or that the UL BLER is less than the first threshold BLER (Operation 1209 - No), the electronic device (101) may operate in the normal mode, in Operation 1203.

[0156] In one embodiment, based on determining that the SAR budget is less than the second threshold budget and that the UL BLER exceeds the second threshold BLER (Operation 1209 - Yes), the electronic device (101) may operate in Mode B in Operation 1211. Referring to FIG. 13, when the electronic device (101) is located within Area C (1340), it may operate in Mode B. Referring to FIG. 14, it may secure an opportunity to transmit an uplink signal with maximum transmit power in the Mode B section (1420). The electronic device (101) may operate in Normal Mode (1440) based on determining that the buffer size is reduced.

[0157] In one embodiment, the electronic device (101) may, while operating in a set mode, perform operations according to the flowchart of FIG. 12 to determine a condition according to at least one of operations 1201, 1205, or 1209. The electronic device (101), while operating in the set mode, may dynamically set the maximum transmission power based on whether a condition for changing the operation mode is satisfied. For example, the electronic device (101), while operating in mode A, may change the operation mode of the electronic device (101) to mode B based on determining that a condition for changing the operation mode to mode B (e.g., operation 1201 - yes, operation 1205 - no, and operation 1209 - yes) is satisfied. The electronic device (101) can change the operation mode of the electronic device (101) to the normal mode based on confirming that a condition (e.g., operation 1201-No) for changing the operation mode to the normal mode is satisfied while operating in mode A. The electronic device (101) can change the operation mode of the electronic device (101) to the normal mode based on confirming that a condition (e.g., operation 1201-Yes, operation 1205-No, and operation 1209-No) for changing the operation mode to the normal mode while operating in mode A is satisfied. The electronic device (101) can change the operation mode of the electronic device (101) to the mode A based on confirming that a condition (e.g., operation 1201-Yes, and operation 1205-Yes) for changing the operation mode to the mode A while operating in mode B is satisfied. The electronic device (101) can change the operating mode of the electronic device (101) to the normal mode based on confirming that the conditions for changing to the normal mode (e.g., operation 1201-yes, operation 1205-no, and operation 1209-no) are satisfied while operating in mode B.The electronic device (101) can change the operation mode of the electronic device (101) to the normal mode based on confirming that a condition for changing to the normal mode (e.g., operation 1201-No) is satisfied while operating in mode B. The electronic device (101) can change the operation mode of the electronic device (101) to the mode A based on confirming that a condition for changing to the mode A (e.g., operation 1201-Yes and operation 1205-Yes) is satisfied while operating in the normal mode. The electronic device (101) can change the operation mode of the electronic device (101) to the mode B based on confirming that a condition for changing to the mode B (e.g., operation 1201-Yes, operation 1205-No, and operation 1209-Yes) is satisfied while operating in the normal mode.

[0158] According to one embodiment, an electronic device (e.g., electronic device (101) of FIG. 1, FIG. 2A, or FIG. 2B) may include communication circuitry (e.g., communication module (190) of FIG. 1 or wireless communication module (192) of FIG. 2A). The electronic device (101) may include at least one processor (e.g., at least one of processor (120) of FIG. 1, first communication processor (212) of FIG. 2A, second communication processor (214) of FIG. 2A, integrated communication processor (260) of FIG. 2B, or communication processor (501)) that includes processing circuitry. The electronic device (101) may include a memory (130) that stores instructions.

[0159] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to establish a connection with an external device via the communication circuit (190).

[0160] In one embodiment, the instructions, when executed individually or collectively by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to transmit a signal to the external device based on setting a first maximum transmit power higher than a maximum transmit power limit value set based on a time averaged specific absorption rate feature operation during a first portion of a first time interval set based on a time averaged specific absorption rate feature operation in a first transmission mode, and to transmit a signal to the external device based on setting a second maximum transmit power lower than the maximum transmit power limit value during a second portion of the first time interval.

[0161] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to switch from the first transmission mode to the second transmission mode based on determining the occurrence of a switching event based on information associated with at least one of a channel condition, a data size, or a specific absorption rate budget when transmitting a signal to the external device.

[0162] In one embodiment, the instructions, when executed individually or collectively by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to transmit a signal to the external device based on setting a third maximum transmit power equal to or lower than the first maximum transmit power during a third period portion of the second time interval set based on the operation of the SAR function in the second transmission mode, and to transmit a signal to the external device based on setting a fourth maximum transmit power different from the second maximum transmit power during a fourth period portion of the second time interval.

[0163] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to set the first maximum transmit power to the maximum transmittable power of the electronic device (101).

[0164] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to set the maximum transmit power limit value to a first value (e.g., 3 dB) lower than the maximum transmittable power of the electronic device (101).

[0165] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to transmit a signal to the external device based on setting the third maximum transmit power to be lower than the maximum transmit power limit value and higher than the second maximum transmit power during the third interval portion when the channel state is the first state, and to transmit a signal to the external device based on setting the fourth maximum transmit power to be equal to or higher than the maximum transmit power limit value during the fourth interval portion.

[0166] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to set the third maximum transmit power to be lower by a second value (e.g., 4 dB) than the maximum transmittable power of the electronic device (101) and to set the fourth maximum transmit power to be equal to the maximum transmit power limit value when the channel state is the first state.

[0167] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to set the third maximum transmit power to a third value (e.g., 19 dBm) and to set the fourth maximum transmit power to a fourth value (e.g., 20 dBm) when the channel state is the first state.

[0168] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to transmit a signal to the external device based on setting the third maximum transmit power to be between the first maximum transmit power and the maximum transmit power limit value during the third interval portion when the channel state is the second state, and to transmit a signal to the external device based on setting the fourth maximum transmit power to be equal to or higher than the second maximum transmit power during the fourth interval portion.

[0169] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to set the third maximum transmit power to a fifth value (e.g., 2 dB) lower than the maximum transmittable power of the electronic device, and to set the fourth maximum transmit power to a sixth value (e.g., 3 dB) lower than the maximum transmit power limit value, when the channel state is the second state.

[0170] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to set the third maximum transmit power to a seventh value (e.g., 21 dBm) and to set the fourth maximum transmit power to an eighth value (e.g., 17 dBm) when the channel state is the second state.

[0171] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to transmit a signal to the external device based on setting the third maximum transmit power equal to the first maximum transmit power during the third interval portion when the channel state is the third state, and to transmit a signal to the external device based on setting the fourth maximum transmit power lower than the second maximum transmit power during the fourth interval portion.

[0172] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to set the third maximum transmit power equal to the maximum transmittable power of the electronic device (101) and to set the fourth maximum transmit power to be lower by a ninth value (e.g., 20 dB) than the maximum transmit power limit value when the channel state is the third state.

[0173] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to set the third maximum transmit power to a tenth value (e.g., 23 dBm) and to set the fourth maximum transmit power to an eleventh value (e.g., 0 dBm) when the channel state is the third state.

[0174] In one embodiment, the channel condition of the third state may be worse than the channel condition of the first state or the second state.

[0175] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to set the first maximum transmit power, the second maximum transmit power, the first interval portion, and the second interval portion such that, in the first transmission mode, a product of a difference between the first maximum transmit power and the maximum transmit power limit value and a first time elapsed during the first interval portion is substantially equal to a product of a difference between the maximum transmit power limit value and the second maximum transmit power and a second time elapsed during the second interval portion.

[0176] In one embodiment, the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), may cause the electronic device (101) to set the third maximum transmit power, the fourth maximum transmit power, the third interval portion, and the fourth interval portion such that, in the second transmission mode, a product of a difference between the third maximum transmit power and the maximum transmit power limit value and a third time elapsed during the third interval portion is substantially equal to a product of a difference between the maximum transmit power limit value and the fourth maximum transmit power and a fourth time elapsed during the fourth interval portion.

[0177] In one embodiment, the time elapsed during the first time interval or the time elapsed during the second time interval may include a set time (e.g., 60 seconds).

[0178] In one embodiment, the information related to the channel condition may include at least one of a block error rate (BLER), a reference signal received power (RSRP), a reference signal received quality (RSRQ), or a reference signal strength indicator (RSSI).

[0179] According to one embodiment, the method of the electronic device (101) may include an operation of establishing a connection with an external device.

[0180] In one embodiment, the method may include, in a first transmission mode, transmitting a signal to the external device based on setting a first maximum transmission power higher than a maximum transmission power limit value set based on a time averaged specific absorption rate feature operation during a first portion of a first time interval set based on a time averaged specific absorption rate feature operation, and transmitting a signal to the external device based on setting a second maximum transmission power lower than the maximum transmission power limit value during a second portion of the first time interval.

[0181] In one embodiment, the method may include switching from the first transmission mode to the second transmission mode based on determining the occurrence of a switching event based on information associated with at least one of a channel condition, a data size, or a specific absorption rate budget when transmitting a signal to the external device.

[0182] In one embodiment, the method may include, in the second transmission mode, transmitting a signal to the external device based on setting a third maximum transmission power that is equal to or lower than the first maximum transmission power during a third period of the second time period set based on the operation of the SAR function, and transmitting a signal to the external device based on setting a fourth maximum transmission power that is different from the second maximum transmission power during a fourth period of the second time period.

[0183] In one embodiment, the method may further include setting the first maximum transmission power, the second maximum transmission power, the first interval portion, and the second interval portion such that, in the first transmission mode, a product of a difference between the first maximum transmission power and the maximum transmission power limit value and a first time elapsed during the first interval portion is substantially equal to a product of a difference between the maximum transmission power limit value and the second maximum transmission power and a second time elapsed during the second interval portion.

[0184] According to one embodiment, a storage medium storing computer-readable instructions may be provided.

[0185] In one embodiment, the instructions, when individually or collectively executed by at least one processor (120; 212; 214; 260; 501) comprising processing circuitry of the electronic device (101), may cause the electronic device (101) to establish a connection with an external device via the communication circuitry (190) of the electronic device (101).

[0186] In one embodiment, the instructions, when individually or collectively executed by at least one processor (120; 212; 214; 260; 501) of the electronic device (101), may cause the electronic device (101) to, in a first transmission mode, transmit a signal to the external device based on setting a first maximum transmit power higher than a maximum transmit power limit value set based on a time averaged specific absorption rate feature operation during a first portion of a first time interval set based on a time averaged specific absorption rate feature operation, and to transmit a signal to the external device based on setting a second maximum transmit power lower than the maximum transmit power limit value during a second portion of the first time interval.

[0187] In one embodiment, the instructions, when individually or collectively executed by at least one processor (120; 212; 214; 260; 501) of the electronic device (101), may cause the electronic device (101) to switch from the first transmission mode to the second transmission mode based on determining the occurrence of a switching event based on information associated with at least one of a channel condition, a data size, or a specific absorption rate budget when transmitting a signal to the external device.

[0188] In one embodiment, the instructions, when individually or collectively executed by at least one processor (120; 212; 214; 260; 501) of the electronic device (101), may cause the electronic device (101) to transmit a signal to the external device based on setting a third maximum transmit power equal to or lower than the first maximum transmit power during a third period portion of the second time period set based on the operation of the SAR function in the second transmission mode, and to transmit a signal to the external device based on setting a fourth maximum transmit power different from the second maximum transmit power during a fourth period portion of the second time period.

[0189] Electronic devices according to the various embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments of this document are not limited to the aforementioned devices.

[0190] The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0191] The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0192] Various embodiments of the present document may be implemented as software (e.g., a program (140)) including one or more instructions stored in a storage medium (e.g., an internal memory (136) or an external memory (138)) readable by a machine (e.g., an electronic device (101)). For example, a processor (e.g., a processor (120)) of the machine (e.g., an electronic device (101)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0193] According to one embodiment, the method according to various embodiments disclosed in this document may be provided as a computer program product. The computer program product may be traded between sellers and buyers as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or may be provided through an application store (e.g., Play Store). TM ) or directly between two user devices (e.g., smart phones), online distribution (e.g., downloading or uploading). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0194] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In an electronic device (101), Communication circuit (190); At least one processor (120;212;214;260;501) comprising processing circuitry; and A memory (130) for storing instructions, wherein the instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: Through the above communication circuit (190), a connection is established with an external device, In a first transmission mode, a signal is transmitted to the external device based on setting a first maximum transmission power higher than a maximum transmission power limit value set based on a time averaged specific absorption rate feature operation during a first period portion of a first time period set based on a time averaged specific absorption rate feature operation, and a signal is transmitted to the external device based on setting a second maximum transmission power lower than the maximum transmission power limit value during a second period portion of the first time period. Switching from the first transmission mode to the second transmission mode based on determining the occurrence of a switching event based on information associated with at least one of a channel state, a data size, or a specific absorption rate budget when transmitting a signal to the external device, and An electronic device (101) that causes a signal to be transmitted to the external device based on setting a third maximum transmission power equal to or lower than the first maximum transmission power during a third period of the second time period set based on the operation of the SAR function in the second transmission mode, and causes a signal to be transmitted to the external device based on setting a fourth maximum transmission power different from the second maximum transmission power during a fourth period of the second time period.

2. In paragraph 1, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: An electronic device (101) that causes the first maximum transmission power to be set to the maximum transmittable power of the electronic device (101).

3. In paragraph 1 or 2, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: An electronic device (101) that causes the maximum transmission power limit value to be set lower by a first value than the maximum transmittable power of the electronic device (101).

4. In any one of paragraphs 1 to 3, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: An electronic device (101) that causes a signal to be transmitted to the external device based on setting the third maximum transmission power to be lower than the maximum transmission power limit value and higher than the second maximum transmission power during the third interval portion when the channel state is the first state, and causes a signal to be transmitted to the external device based on setting the fourth maximum transmission power to be equal to or higher than the maximum transmission power limit value during the fourth interval portion.

5. In any one of paragraphs 1 to 4, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: An electronic device (101) that causes the third maximum transmission power to be set lower by a second value than the maximum transmittable power of the electronic device (101) when the channel state is the first state, and causes the fourth maximum transmission power to be set equal to the maximum transmission power limit value.

6. In any one of paragraphs 1 to 5, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: An electronic device (101) that causes the third maximum transmission power to be set to a third value and the fourth maximum transmission power to be set to a fourth value when the channel state is the first state.

7. In any one of paragraphs 1 to 6, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: An electronic device (101) that causes a signal to be transmitted to the external device based on setting the third maximum transmission power to be between the first maximum transmission power and the maximum transmission power limit value during the third interval portion when the channel state is the second state, and causes a signal to be transmitted to the external device based on setting the fourth maximum transmission power to be equal to or higher than the second maximum transmission power during the fourth interval portion.

8. In any one of paragraphs 1 to 7, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: An electronic device (101) that causes the third maximum transmission power to be set lower by a fifth value than the maximum transmittable power of the electronic device, and the fourth maximum transmission power to be set lower by a sixth value than the maximum transmission power limit value, when the channel state is the second state.

9. In any one of paragraphs 1 to 8, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: An electronic device (101) that causes the third maximum transmission power to be set to a seventh value and the fourth maximum transmission power to be set to an eighth value when the channel state is the second state.

10. In any one of paragraphs 1 to 9, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: An electronic device (101) that causes a signal to be transmitted to the external device based on setting the third maximum transmission power equal to the first maximum transmission power during the third interval portion when the channel state is the third state, and causes a signal to be transmitted to the external device based on setting the fourth maximum transmission power lower than the second maximum transmission power during the fourth interval portion.

11. In any one of paragraphs 1 to 10, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: An electronic device (101) that causes the third maximum transmission power to be set equal to the maximum transmittable power of the electronic device (101) and the fourth maximum transmission power to be set lower by a ninth value than the maximum transmission power limit value when the channel state is the third state.

12. In any one of paragraphs 1 to 11, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: An electronic device (101) that causes the third maximum transmission power to be set to a 10th value and the fourth maximum transmission power to be set to an 11th value when the channel state is the third state.

13. In any one of paragraphs 1 to 12, The above instructions, when individually or collectively executed by the at least one processor (120; 212; 214; 260; 501), cause the electronic device (101) to: In the first transmission mode, the first maximum transmission power, the second maximum transmission power, the first interval portion, and the second interval portion are set so that the product of the difference between the first maximum transmission power and the maximum transmission power limit value and the first time elapsed during the first interval portion is substantially equal to the product of the difference between the maximum transmission power limit value and the second maximum transmission power and the second time elapsed during the second interval portion, or An electronic device (101) that causes the third maximum transmission power, the fourth maximum transmission power, the third interval portion, and the fourth interval portion to be set so that, in the second transmission mode, a product of a difference between the third maximum transmission power and the maximum transmission power limit value and a third time elapsed during the third interval portion is substantially equal to a product of a difference between the maximum transmission power limit value and the fourth maximum transmission power and a fourth time elapsed during the fourth interval portion.

14. In the method of electronic device (101), The act of establishing a connection with an external device; In a first transmission mode, an operation of transmitting a signal to the external device based on setting a first maximum transmission power higher than a maximum transmission power limit value set based on a time averaged specific absorption rate feature operation during a first period portion of a first time period set based on a time averaged specific absorption rate feature operation, and transmitting a signal to the external device based on setting a second maximum transmission power lower than the maximum transmission power limit value during a second period portion of the first time period; An operation of switching from the first transmission mode to the second transmission mode based on determining the occurrence of a switching event based on information associated with at least one of a channel state, a data size, or a specific absorption rate budget when transmitting a signal to the external device; and In the second transmission mode, an operation of transmitting a signal to the external device based on setting a third maximum transmission power equal to or lower than the first maximum transmission power during a third period of the second time period set based on the operation of the SAR function, and transmitting a signal to the external device based on setting a fourth maximum transmission power different from the second maximum transmission power during a fourth period of the second time period. A method comprising:

15. In a storage medium that stores instructions that can be read by a computer, The above instructions, when individually or collectively executed by at least one processor (120; 212; 214; 260; 501) comprising processing circuitry of the electronic device (101), cause the electronic device (101) to: Through the communication circuit (190) of the above electronic device (101), a connection is established with an external device, In a first transmission mode, a signal is transmitted to the external device based on setting a first maximum transmission power higher than a maximum transmission power limit value set based on a time averaged specific absorption rate feature operation during a first period portion of a first time period set based on a time averaged specific absorption rate feature operation, and a signal is transmitted to the external device based on setting a second maximum transmission power lower than the maximum transmission power limit value during a second period portion of the first time period. Switching from the first transmission mode to the second transmission mode based on determining the occurrence of a switching event based on information associated with at least one of a channel state, a data size, or a specific absorption rate budget when transmitting a signal to the external device, and A storage medium that causes a signal to be transmitted to the external device based on setting a third maximum transmission power equal to or lower than the first maximum transmission power during a third period of the second time period set based on the operation of the SAR function in the second transmission mode, and causes a signal to be transmitted to the external device based on setting a fourth maximum transmission power different from the second maximum transmission power during a fourth period of the second time period.

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