WO2023140689A1 - Sar에 기반하여 백 오프를 수행하는 전자 장치 및 동작 방법 - Google Patents
Sar에 기반하여 백 오프를 수행하는 전자 장치 및 동작 방법 Download PDFInfo
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- WO2023140689A1 WO2023140689A1 PCT/KR2023/001026 KR2023001026W WO2023140689A1 WO 2023140689 A1 WO2023140689 A1 WO 2023140689A1 KR 2023001026 W KR2023001026 W KR 2023001026W WO 2023140689 A1 WO2023140689 A1 WO 2023140689A1
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- sar
- antenna
- path
- transmit power
- electronic device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
- H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/38—TPC being performed in particular situations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- Various embodiments of the present disclosure relate to an electronic device that performs back-off of a maximum transmission power limit (MTPL) or transmission power based on a specific absorption rate (SAR) and an operating method thereof.
- MTPL maximum transmission power limit
- SAR specific absorption rate
- a user equipment may transmit electromagnetic waves to transmit/receive data with a base station.
- Electromagnetic waves emitted by user devices may have a harmful effect on the human body, and various domestic and foreign organizations are attempting to limit electromagnetic waves having a harmful effect on the human body.
- a specific absorption rate is a numerical value representing how much electromagnetic waves radiated from a mobile communication terminal are absorbed by a human body.
- SAR uses a unit of KW/g (or mW/g), which may mean the amount of power (KW, W or mW) absorbed per 1g of the human body.
- the user device may back off the transmission power (or maximum transmission power limit (MTPL)). For example, when the occurrence of a specific event (eg, grip, hot-spot, or proxy) is confirmed, the user device transmits a communication signal with the back-off power corresponding to the event, or transmits the communication signal with the transmission power set based on the back-off maximum transmission power limit.
- MTPL maximum transmission power limit
- a technique of backing off transmission power (or maximum transmission power limit) based on the total amount of SAR values accumulated over a certain period of time (or the average value of SAR values generated over a certain period of time) is also being used.
- the SAR that affects the human body instantaneously, the SAR that affects the human body on average must also be considered, and accordingly, the total amount of accumulated SAR values (or the average value of SAR generated for a certain period of time) satisfies the specified condition.
- Back-off of the transmit power (or maximum transmit power limit) can be performed.
- the user device may transmit each of the two RF signals using the two RF paths, respectively, and may refer to this as 2 TX.
- the UE may simultaneously transmit at least two RF signals based on multi radio access technology (MR-DC)-dual connectivity (MR-DC) through each of the two RF paths.
- the UE may simultaneously transmit at least two RF signals based on protocol stacks of a dual subscriber identification module (DSDA) dual active (DSDA) through each of the two RF paths.
- MR-DC multi radio access technology
- DSDA dual subscriber identification module
- 2 TX when RF signals are transmitted through each of physically adjacent antennas, since the sum of SARs by each RF signal is calculated as the total SAR, the cumulative SAR can increase relatively quickly.
- one transmit power of 2 TX or back off of the maximum transmit power limit may be required.
- the transmit power or the maximum transmit power limit is backed off, the possibility of disconnection of the communication connection may increase.
- RF signals are transmitted through antennas that are physically relatively far apart, whether to back off may be determined based on SARs corresponding to respective RF signals, not the sum of SARs.
- a recent foldable electronic device or rollable electronic device may have a changeable housing shape and a variable distance between antennas.
- An electronic device and an operating method thereof may determine whether to back off based on a distance between antennas for transmitting RF signals.
- an electronic device includes at least one housing, a plurality of antennas disposed on the at least one housing, at least one RF circuit, and at least one processor, wherein the at least one processor determines to transmit an RF signal through a first RF path corresponding to a first antenna among the plurality of antennas, checks a state of the at least one housing, and determines a maximum transmit power limit back off condition associated with an antenna group in which an accumulated SAR for the first RF path is determined according to a state of the at least one housing. Based on whether it is satisfied, determine a maximum transmit power limit corresponding to the first RF path, and control the at least one RF circuit to transmit the RF signal based on a transmit power set based on the maximum transmit power limit.
- an electronic device includes at least one housing, a plurality of antennas disposed on the at least one housing, at least one RF circuit, and at least one processor, wherein the at least one processor determines to transmit RF signals through a first RF path corresponding to a first antenna among the plurality of antennas and a second RF path corresponding to a second antenna among the plurality of antennas, and determines whether a distance between the first antenna and the second antenna is less than a threshold distance, wherein A distance between the first antenna and the second antenna varies according to a state of the at least one housing, and based on whether the sum of the first accumulated SAR corresponding to the first RF path and the second accumulated SAR corresponding to the second second RF path satisfies a maximum transmit power limit back off condition based on a distance between the first antenna and the second antenna being less than the threshold distance, a first maximum transmit power limit corresponding to the first RF path or the second maximum transmit power limit corresponding to the second RF path.
- an operating method of an electronic device including at least one housing, a plurality of antennas disposed on the at least one housing, and at least one RF circuit may include determining to transmit an RF signal through a first RF path corresponding to a first antenna among the plurality of antennas, checking a state of the at least one housing, and determining whether an accumulated SAR for the first RF path satisfies a maximum transmit power limit back-off condition associated with an antenna group determined according to a state of the at least one housing, Checking a maximum transmit power limit corresponding to one RF path, and controlling the at least one RF circuit to transmit the RF signal based on a transmit power set based on the maximum transmit power limit.
- a method of operating an electronic device including at least one housing, a plurality of antennas disposed on the at least one housing, and at least one RF circuit may include determining to transmit RF signals through a first RF path corresponding to a first antenna among the plurality of antennas and a second RF path corresponding to a second antenna among the plurality of antennas, determining whether a distance between the first antenna and the second antenna is less than a threshold distance, wherein the first antenna and the second antenna The distance between the two antennas varies according to the state of the at least one housing, and based on whether the sum of the first accumulated SAR corresponding to the first RF path and the second accumulated SAR corresponding to the second RF path satisfies a maximum transmit power limit back-off condition based on a distance between the first antenna and the second antenna being less than the threshold distance, a first maximum transmit power limit corresponding to the first RF path or a maximum transmit power limit corresponding to the second RF path and controlling the at least one
- an electronic device capable of determining whether to back off based on a distance between antennas for transmitting RF signals and an operating method thereof may be provided. Accordingly, when RF signals are transmitted through antennas of a relatively large distance according to a change in the shape of a housing of an electronic device, whether to back off may be determined based on each SAR rather than the cumulative SAR sum. Accordingly, back-off of transmit power (or maximum transmit power limit) in an arbitrary RF path can be delayed or prevented.
- FIG. 1 is a block diagram of an electronic device in a network environment, according to various embodiments.
- 2A is a block diagram of an electronic device for supporting legacy network communication and 5G network communication according to various embodiments.
- 2B is a block diagram of an electronic device for supporting legacy network communication and 5G network communication according to various embodiments.
- 3A is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- 3B is a diagram for explaining transmit power and SAR over time according to various embodiments.
- 4A, 4B to 4C show graphs of transmission power per time according to various embodiments.
- 4D to 4E show tables of transmission power per time according to various embodiments.
- FIG. 5 is a block diagram illustrating a plurality of transmission paths of an electronic device according to various embodiments.
- 6A is a diagram illustrating a change in a state of a housing of an electronic device according to various embodiments.
- 6B and 6C are diagrams illustrating distances between antennas according to various embodiments.
- FIG. 7A is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- FIG. 7B illustrates a table of transmission power per time according to various embodiments.
- FIG. 8 is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- FIG. 9 is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- FIG. 10 is a diagram for explaining a SAR event according to various embodiments.
- 11A is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- 11B is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- FIG. 12 is a diagram for describing back-off of the maximum transmit power limit and restoration of the maximum transmit power limit according to various embodiments.
- 13A is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- 13B is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- FIG. 14 is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- 15 is a diagram for explaining an antenna group in a half-folded state according to various embodiments.
- 16 is a diagram illustrating a distance between antennas of an electronic device according to various embodiments.
- 17 is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- FIGS. 18A and 18B illustrate top and side views of an electronic device according to various embodiments.
- 19A and 19B illustrate top and side views of an electronic device according to various embodiments.
- 20A is a diagram of an electronic device capable of being folded multiple times according to various embodiments.
- 20B is a side view of an electronic device capable of being folded multiple times according to various embodiments.
- 20C illustrates a state in which an electronic device capable of being folded multiple times according to various embodiments is folded multiple times.
- 21 is a diagram of an electronic device according to various embodiments.
- FIG. 1 is a block diagram of an electronic device 101 within a network environment 100, according to various embodiments.
- an electronic device 101 may communicate with the electronic device 102 through a first network 198 (eg, a short-distance wireless communication network) or may communicate with an electronic device 104 or a server 108 through a second network 199 (eg, a long-distance wireless communication network).
- the electronic device 101 may communicate with the electronic device 104 through the server 108 .
- the electronic device 101 includes a processor 120, a memory 130, an input module 150, a sound 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.
- at least one of these components eg, the connection terminal 178) may be omitted or one or more other components may be added.
- some of these components eg, sensor module 176, camera module 180, or antenna module 197) may be integrated into one component (eg, display module 160).
- the processor 120 may, for example, execute software (eg, program 140) to control at least one other component (eg, hardware or software component) of the electronic device 101 connected to the processor 120, and may perform various data processing or calculations. According to one embodiment, as at least part of data processing or operation, processor 120 may store commands or data received from other components (e.g., sensor module 176 or communication module 190) in volatile memory 132, process the commands or data stored in volatile memory 132, and store resultant data in non-volatile memory 134.
- software eg, program 140
- processor 120 may store commands or data received from other components (e.g., sensor module 176 or communication module 190) in volatile memory 132, process the commands or data stored in volatile memory 132, and store resultant data in non-volatile memory 134.
- the processor 120 may include a main processor 121 (eg, a central processing unit or an application processor) or a secondary processor 123 (eg, a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that may operate independently or together with the main processor 121.
- a main processor 121 eg, a central processing unit or an application processor
- a secondary processor 123 eg, a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor
- the secondary processor 123 may be implemented separately from or as part of the main processor 121 .
- the auxiliary processor 123 functions related to at least one of the components of the electronic device 101 (eg, the display module 160, the sensor module 176, or the communication module 190) along with the main processor 121 while the main processor 121 is in an active (eg, application execution) state or instead of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state. Alternatively, at least some of the states may be controlled.
- the auxiliary processor 123 eg, an image signal processor or a communication processor
- the auxiliary processor 123 may include a hardware structure specialized for processing an artificial intelligence model.
- AI models can be created through machine learning. Such learning may be performed, for example, in the electronic device 101 itself where artificial intelligence is performed, or may be performed through a separate server (eg, the server 108).
- the learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the above examples.
- the artificial intelligence model may include a plurality of 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), deep Q-networks, or a combination of two or more of the above, but is not limited to the above examples.
- the artificial intelligence model may include, in addition or alternatively, software structures in addition to hardware structures.
- the memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 176) of the electronic device 101 .
- the data may include, for example, input data or output data for software (eg, program 140) and commands related thereto.
- the memory 130 may include volatile memory 132 or non-volatile memory 134 .
- 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 .
- the input module 150 may receive a command or data to be used by a component (eg, the processor 120) of the electronic device 101 from the outside of the electronic device 101 (eg, a user).
- the input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (eg, a button), or a digital pen (eg, a stylus pen).
- the sound output module 155 may output sound signals to the outside of the electronic device 101 .
- the sound output module 155 may include, for example, a speaker or a receiver.
- the speaker can be used for general purposes such as multimedia playback or recording playback.
- a receiver may be used to receive an incoming call. According to one embodiment, the receiver may be implemented separately from the speaker or as part of it.
- the display module 160 may visually provide information to the outside of the electronic device 101 (eg, a user).
- the display module 160 may include, for example, a display, a hologram device, or a projector and a control circuit for controlling the device.
- the display module 160 may include a touch sensor set to detect a touch or a pressure sensor set to measure the intensity of force generated by the touch.
- the audio module 170 may convert sound into an electrical signal or vice versa. According to an embodiment, the audio module 170 may obtain 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) connected directly or wirelessly to the electronic device 101.
- an external electronic device e.g., electronic device 102
- speaker or headphone e.g., speaker or headphone
- the sensor module 176 may detect an operating state (eg, power or temperature) of the electronic device 101 or an external environmental state (eg, a user state), and generate an electrical signal or data value corresponding to the detected state.
- the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a bio sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.
- the interface 177 may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device 101 to an external electronic device (eg, the electronic device 102).
- 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.
- HDMI high definition multimedia interface
- USB universal serial bus
- SD card interface Secure Digital Card interface
- audio interface audio interface
- connection terminal 178 may include a connector through which the electronic device 101 may be physically connected to an external electronic device (eg, the electronic device 102).
- the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).
- the haptic module 179 may convert electrical signals into mechanical stimuli (eg, vibration or motion) or electrical stimuli that a user may perceive through tactile or kinesthetic senses.
- the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.
- the camera module 180 may capture still images and moving images. According to one embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.
- the power management module 188 may manage power supplied to the electronic device 101 .
- the power management module 188 may be implemented as at least part of a power management integrated circuit (PMIC), for example.
- PMIC power management integrated circuit
- the battery 189 may supply power to at least one component of the electronic device 101 .
- the battery 189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.
- the communication module 190 may support establishment of a direct (e.g., wired) communication channel or wireless communication channel between the electronic device 101 and an external electronic device (e.g., the electronic device 102, the electronic device 104, or the server 108), and communication through the established communication channel.
- the communication module 190 may include one or more communication processors that operate independently of the processor 120 (eg, an application processor) and support direct (eg, wired) communication or wireless communication.
- the communication module 190 may include a wireless communication module 192 (eg, 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 (eg, a local area network (LAN) communication module or a power line communication module).
- a wireless communication module 192 eg, a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module
- GNSS global navigation satellite system
- wired communication module 194 eg, a local area network (LAN) communication module or a power line communication module.
- a corresponding communication module among these communication modules may communicate with the external electronic device 104 through a first network 198 (eg, a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or an infrared data association (IrDA)) or a second network 199 (eg, a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a long-distance communication network such as a computer network (eg, a LAN or a WAN)).
- a first network 198 eg, a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or an infrared data association (IrDA)
- a second network 199 eg, a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a long-distance communication network such as a computer network (eg, a LAN or a WAN)
- a computer network eg, a
- the wireless communication module 192 may identify or authenticate the electronic device 101 within a communication network such as the first network 198 or the second network 199 using subscriber information (eg, International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196.
- subscriber information eg, International Mobile Subscriber Identifier (IMSI)
- IMSI International Mobile Subscriber Identifier
- the wireless communication module 192 may support a 5G network after a 4G network and a next-generation communication technology, for example, NR access technology (new radio access technology).
- NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and access to multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)).
- eMBB enhanced mobile broadband
- mMTC massive machine type communications
- URLLC ultra-reliable and low-latency communications
- the wireless communication module 192 may 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 may support various requirements defined for the electronic device 101, an external electronic device (eg, the electronic device 104), or a network system (eg, the second network 199).
- the wireless communication module 192 may support peak data rate (eg, 20 Gbps or more) for eMBB realization, loss coverage (eg, 164 dB or less) for mMTC realization, or U-plane latency (eg, downlink (DL) and uplink (UL) 0.5 ms or less, or round trip 1 ms or less) for realizing URLLC.
- peak data rate eg, 20 Gbps or more
- loss coverage eg, 164 dB or less
- U-plane latency eg, downlink (DL) and uplink (UL) 0.5 ms or less, or round trip 1 ms or less
- the antenna module 197 may transmit or receive signals or power to the outside (eg, an external electronic device).
- the antenna module 197 may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (eg, PCB).
- the antenna module 197 may include a plurality of antennas (eg, 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 by, for example, the communication module 190. A signal or power may be transmitted or received between the communication module 190 and an external electronic device through the selected at least one antenna.
- other components eg, a radio frequency integrated circuit (RFIC) may be additionally created as a part of the antenna module 197 in addition to the radiator.
- RFIC radio frequency integrated circuit
- the antenna module 197 may generate a mmWave antenna module.
- the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (eg, bottom surface) of the printed circuit board and capable of supporting a designated high frequency band (eg, mmWave band), and a plurality of antennas (eg, array antennas) disposed on or adjacent to a second surface (eg, top surface or side surface) of the printed circuit board and capable of transmitting or receiving signals in the designated high frequency band.
- peripheral devices e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)
- signals e.g., commands or data
- commands or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 .
- Each of the external electronic devices 102 or 104 may be the same as or different from the electronic device 101 .
- all or part of operations executed in the electronic device 101 may be executed in one or more external electronic devices among the external electronic devices 102 , 104 , or 108 .
- the electronic device 101 may request one or more external electronic devices to perform the function or at least part of the service, instead of or in addition to executing the function or service by itself.
- One or more external electronic devices receiving the request may execute at least a part of the requested function or service or an additional function or service related to the request, and deliver the execution result to the electronic device 101 .
- the electronic device 101 may provide the result as at least part of a response to the request as it is or additionally processed.
- cloud computing distributed computing, mobile edge computing (MEC), or client-server computing technology may be used.
- the electronic device 101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing.
- the external electronic device 104 may include an internet of things (IoT) device.
- Server 108 may be an intelligent server using machine learning and/or neural networks. According to one embodiment, the external electronic device 104 or server 108 may be included in the second network 199 .
- the electronic device 101 may be applied to intelligent services (eg, smart home, smart city, smart car, or health care) based on 5G communication technology and IoT-related technology.
- the electronic device 101 includes 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, and 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 .
- the electronic device 101 may further include at least one of the components illustrated in FIG. 1
- the second network 199 may further include at least one other network.
- the first communications processor 212, the second communications 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.
- the fourth RFIC 228 may be omitted or included as part of the third RFIC 226 .
- the first communication processor 212 may establish a communication channel of a band to be used for wireless communication with the first cellular network 292 and support legacy network communication through the established communication channel.
- 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 (eg, about 6 GHz to about 60 GHz) among bands to be used for wireless communication with the second cellular network 294, and support 5G network communication through the established communication channel.
- the second cellular network 294 may be a 5G network defined by 3GPP.
- the first communication processor 212 or the second communication processor 214 may support establishment of a communication channel corresponding to another designated band (eg, about 6 GHz or less) among bands to be used for wireless communication with the second cellular network 294, and 5G network communication through the established communication channel.
- another designated band eg, about 6 GHz or less
- the first communication processor 212 may transmit and receive data with the second communication processor 214 .
- data classified as being transmitted through the second cellular network 294 may be changed to be transmitted through the first cellular network 292 .
- the first communication processor 212 may receive transmission data from the second communication processor 214 .
- the first communication processor 212 may transmit and receive data through the second communication processor 214 and the inter-processor interface 213 .
- the inter-processor interface 213 may be implemented as, for example, a universal asynchronous receiver/transmitter (UART) (eg, HS-high speed-UART (HS-UART) or peripheral component interconnect bus express (PCIe) interface, but the type is not limited.
- UART universal asynchronous receiver/transmitter
- PCIe peripheral component interconnect bus express
- first communication processor 212 and the second communication processor 214 may exchange control information and packet data information using, for example, a shared memory.
- First communication processor 2 12 may transmit and receive various information such as sensing information, information on output strength, and resource block (RB) allocation information with the second communication processor 214 .
- RB resource block
- the first communications processor 212 may not be directly coupled to the second communications processor 214 .
- the first communication processor 212 may transmit and receive data through the second communication processor 214 and the processor 120 (eg, an application processor).
- the first communication processor 212 and the second communication processor 214 may transmit and receive data with the processor 120 (eg, an application processor) through an HS-UART interface or a PCIe interface, but the type of interface is not limited.
- the first communication processor 212 and the second communication processor 214 may exchange control information and packet data information using a shared memory with the processor 120 (eg, an application processor).
- the first communication processor 212 and the second communication processor 214 may be implemented on a single chip or in a single package. According to various embodiments, the first communication processor 212 or the second communication processor 214 may be formed in a single chip or single package with the processor 120, coprocessor 123, or communication module 190. For example, as shown in FIG. 2B , the communication processor 440 may support functions for communication with both the first cellular network 292 and the second cellular network 294 .
- the first RFIC 222 may, upon transmission, convert a baseband signal generated by the first communications processor 212 into a radio frequency (RF) signal of about 700 MHz to about 3 GHz used in the first cellular network 292 (e.g., a legacy network).
- RF radio frequency
- an RF signal is obtained from a first network 292 (eg, a legacy network) through an antenna (eg, the first antenna module 242), and preprocessed through an RFFE (eg, the first RFFE 232).
- the first RFIC 222 may convert the preprocessed RF signal into a baseband signal to be processed by the first communication processor 212 .
- the second RFIC 224 may convert the baseband signal generated by the first communication processor 212 or the second communication processor 214 into an RF signal (hereinafter referred to as a 5G Sub6 RF signal) of a Sub6 band (eg, about 6 GHz or less) used in the second cellular network 294 (eg, a 5G network) during transmission.
- a 5G Sub6 RF signal is obtained from the second cellular network 294 (eg, 5G network) through an antenna (eg, the second antenna module 244), and the RFFE (eg, the second RFFE 234). It may be pre-processed.
- the second RFIC 224 may convert the preprocessed 5G Sub6 RF signal into a baseband signal to be processed by a corresponding communication processor among the first communication processor 212 and the second communication processor 214 .
- the third RFIC 226 converts the baseband signal generated by the second communication processor 214 into an RF signal (hereinafter, 5G Above6 RF signal) of a 5G Above6 band (eg, about 6 GHz to about 60 GHz) to be used in the second cellular network 294 (eg, a 5G network).
- the 5G Above6 RF signal may be obtained from the second cellular network 294 (eg, 5G network) via an antenna (eg, antenna 248) and preprocessed via a third RFFE 236.
- the third RFIC 226 may convert the preprocessed 5G Above6 RF signal into a baseband signal to be processed by the second communication processor 214 .
- the third RFFE 236 may be formed as part of the third RFIC 226 .
- the electronic device 101 may include a fourth RFIC 228 separately from or at least as part of the third RFIC 226.
- the fourth RFIC 228 converts the 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 transfers the IF signal to the third RFIC 226.
- the third RFIC 226 may convert the IF signal into a 5G Above6 RF signal.
- the 5G Above6 RF signal may be received from the second cellular network 294 (eg, 5G network) via an antenna (eg, antenna 248) and converted to an IF signal by a third RFIC 226.
- the fourth RFIC 228 may convert the IF signal into a baseband signal so that the second communication processor 214 can process it.
- the first RFIC 222 and the second RFIC 224 may be implemented as a single chip or at least part of a single package.
- the first RFIC 222 and the second RFIC 224 in FIG. 2A or 2B may be implemented as an integrated RFIC.
- the integrated RFIC is connected to the first RFFE 232 and the second RFFE 234, converts a baseband signal into a signal of a band supported by the first RFFE 232 and/or the second RFFE 234, and transmits the converted signal to one of the first RFFE 232 and the second RFFE 234.
- the first RFFE 232 and the second RFFE 234 may be implemented as a single chip or at least part of a single package.
- 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 a plurality of corresponding bands.
- third RFIC 226 and antenna 248 may be disposed on the same substrate to form third antenna module 246 .
- the wireless communication module 192 or processor 120 may be disposed on a first substrate (eg, main PCB).
- the third RFIC 226 is disposed on a part (eg, lower surface) of a second substrate (eg, sub PCB) separate from the first substrate, and the antenna 248 is disposed on another part (eg, upper surface), thereby forming the third antenna module 246.
- the electronic device 101 can improve the quality or speed of communication with the second network 294 (eg, 5G network).
- antenna 248 may be formed as an antenna array comprising a plurality of antenna elements that may be used for beamforming.
- the third RFIC 226 may include, for example, a plurality of phase shifters 238 corresponding to a plurality of antenna elements as part of the third RFFE 236 .
- each of the plurality of phase shifters 238 may convert the phase of a 5G Above6 RF signal to be transmitted to the outside of the electronic device 101 (eg, a base station of a 5G network) through a corresponding antenna element.
- each of the plurality of phase shifters 238 may convert the phase of the 5G Above6 RF signal received from the outside through the corresponding antenna element into the same or substantially the same phase. This enables transmission or reception through beamforming between the electronic device 101 and the outside.
- the second cellular network 294 may be operated independently of the first cellular network 292 (eg, a legacy network) (eg, Stand-Alone (SA)) or may be connected to and operated (eg, Non-Stand Alone (NSA)).
- a 5G network may include only an access network (eg, a 5G radio access network (RAN) or a next generation RAN (NG RAN)) and no core network (eg, a next generation core (NGC)).
- the electronic device 101 may access an external network (eg, the Internet) under the control of a core network (eg, evolved packed core (EPC)) of the legacy network.
- a core network eg, evolved packed core (EPC)
- Protocol information for communication with a legacy network e.g., LTE protocol information
- protocol information for communication with a 5G network e.g., New Radio (NR) protocol information
- NR New Radio
- the communication processor (eg, at least one of the first communication processor 212, the second communication processor 214, or the integrated communication processor 260) may be implemented as an integrated circuit, and in this case, may include at least one storage circuit for storing at least one instruction that causes the execution of an operation according to various embodiments and at least one processing circuit for executing the at least one instruction.
- 3A is a flowchart illustrating a method of operating an electronic device according to various embodiments. The embodiment of FIG. 3A will be described with reference to FIGS. 3B and 4A to 4E.
- 3B is a diagram for explaining transmit power and SAR over time according to various embodiments.
- 4A to 4C illustrate graphs of transmission power over time according to various embodiments.
- 4D to 4E show tables of transmission power per time according to various embodiments.
- the electronic device 101 may call a plurality of tables for transmit power corresponding to a plurality of time points in operation 301.
- Table 1 terms such as Table 1 are defined.
- Normal MAX Power Maximum transmit power when SAR margin remains b.
- Normal Max SAR The amount of SAR generated when operating with Normal Max Power c.
- Backoff MAX Power Maximum transmission power when backoff is performed due to insufficient margin of SAR d.
- Backoff Max SAR Size of SAR generated when operating with Backoff Max Power e.
- Average SAR LIMIT The maximum value of average SAR that should not be exceeded during T i.
- Average Time (A_Time) Time measured by accumulating SAR j.
- FIGS. 4A to 4C a description of the table.
- the cumulative SAR accumulated SAR in Table 1 during the measurement time (Measurement time in Table 1), for example, the measurement time including 50 time points, is equal to or less than the maximum cumulative SAR (Max cumulative SAR in Table 1). It may need to be maintained.
- the electronic device 101 may determine the transmission power of the communication signal to be transmitted at the current time point 449 so that the cumulative SAR at the current time point 449 and any time points 409 to 448 in the past (e.g., Average Time in Table 1), additionally, the accumulated SAR of nine future points in time (not shown) (e.g., the Remain Time in Table 1) maintains the maximum cumulative SAR or less.
- the electronic device 101 can check the transmission powers 452 shifted by 1 from the transmission powers 451 at the current time point 449 in FIG. 4A and at any time points 409 to 448 in the past. Meaning that the viewpoint is shifted by 1 may mean that data of the most recent viewpoint (eg, viewpoint 409 in FIG.
- the number of transmit powers 452 at the current time point 449 and at any time points 410 to 448 in the past is 40, which is 41, which is the number of transmit powers 451 in FIG. 4A. It may be less than 1.
- the electronic device 101 may determine the transmit power at the current time point 449 such that the sum of the SAR by the transmit powers 452 and the predicted SAR at additional 10 future time points is maintained below the maximum cumulative SAR. As shown in FIG. 4C, the electronic device 101 can check the transmission powers 453 at the current time point 449 shifted by 25 from the transmission powers 451 and at random points in the past 434 to 448.
- the number of transmit powers 453 is 16, which may be less than 41 transmit powers 451 of FIG. 4A by 25.
- the electronic device 101 may determine the transmit power at the current time point 449 so that the sum of the SAR by the transmit powers 453 and the predicted SAR at additional 34 future time points is less than or equal to the maximum cumulative SAR.
- the electronic device 101 may manage a plurality of graphs shifted by one viewpoint.
- the period for calculating the SAR is a measurement period (P) of Table 1, and may be, for example, an interval between transmission powers in FIGS. 4A to 4C.
- the electronic device 101 may calculate and/or manage T/P - 1 table for a specific time point.
- a configuration for checking an expected SAR value will be described with reference to FIGS. 4D and 4E.
- the electronic device 101 may check the k-th SAR table 460.
- the k-th SAR table 460 may include D1, which is the SAR accumulation value 461 at at least one past time point, the maximum SAR value 462 (D2) at the current time point, and the predicted SAR value 463 (D3) at at least one future time point.
- D1 which is the SAR accumulation value 461 at at least one past time point
- D2 the maximum SAR value 462
- D3 the predicted SAR value 463
- the number of at least one past viewpoint may be a number smaller by 1 than the total number of viewpoints (eg, 100) corresponding to the measurement time (eg, 50 seconds) in the first table.
- N which is the total number of viewpoints (eg, 100)
- the number of at least one past viewpoint may be smaller than the total number of viewpoints by k.
- the electronic device 101 may check the SAR accumulation value D1 of N-k past time points 471 .
- the electronic device 101 may use the maximum SAR value S1 for the current time point 472 .
- the maximum SAR value S1 (eg, normal max SAR of Table 1) may be a SAR value corresponding to the maximum transmission power designated by the electronic device 101 (eg, normal max power of Table 1).
- a SAR value immediately preceding the current time point 472 may be used.
- an average SAR value of past time points 471 of the current time point 472 may be used.
- the electronic device 101 may calculate the sum of the SAR values S2 (eg, the backoff max SAR of Table 1) of the backoff transmit power (eg, the backoff max power of Table 1) for at least one future time point 473.
- the electronic device 101 may check D3 as the accumulated SAR for at least one future time point 473 .
- the number of at least one future viewpoint may be k-1. Accordingly, the electronic device 101, in the k-th table, determines whether D1+D2+D3, the sum of SARs for N time points consisting of N-k past time points, 1 present time point, and k-1 future time points, is greater than the SAR maximum cumulative SAR. If it is determined that the transmission power is exceeded, the electronic device 101 may back off the transmission power at the current time.
- the electronic device 101 may also check the k+1 th table 480 as in FIG. 4E.
- the electronic device 101 can check that the accumulated SAR value 481 of at least one past time point is D4, the maximum SAR value 482 of D2 at the current time point, and the SAR predicted value 483 of at least one future time point D5.
- the electronic device 101 may check whether the accumulated SAR value of D4 + D2 + D5 exceeds the maximum accumulated SAR.
- the number of at least one past viewpoint 491 in the k+1th table may be less than the number of at least one past viewpoint 471 in the kth table by 1.
- the number of at least one future viewpoint 493 may be greater than the number of at least one future viewpoint 473 in the kth table by one (494).
- the electronic device 101 may check the cumulative SAR value of the past, the SAR expected value at the current time point, and the future time point with respect to a plurality of tables corresponding to at least one future time point.
- the electronic device 101 may check the accumulated SAR values for the first table and a total of N ⁇ 1 tables shifted from the first table by i points in time (i is greater than or equal to 1 and less than N ⁇ 2).
- the electronic device 101 may check whether a table in which the sum of the accumulated SAR value and the predicted SAR value exceeds a threshold value exists.
- the electronic device 101 can back off any one (or at least some maximum transmission power limit (MTPL)) of at least some of the transmission powers of the communication signals.
- MTPL maximum transmission power limit
- the back-off of the transmit power in this document may be replaced by the back-off of the maximum transmit power limit.
- the electronic device 101 may transmit a communication signal with the set transmission power in operation 309.
- the backoff of the maximum value of transmission power may mean the backoff of the maximum value of transmission power.
- the electronic device 101 may determine the maximum value of transmission power so that the average magnitude of SAR used during the measurement time does not exceed the average SAR limit. Alternatively, the electronic device 101 may determine the maximum value of transmit power so that the accumulated SAR during the measurement time does not exceed the Max accumulated SAR. The electronic device 101 may determine the maximum value of the maximum power for the next time section every P time period. Conditions for operating with normal max power during the next P time may be as follows.
- Tx Room > Occurrence SAR when operating with normal max power for the next P (normal max SAR in Table 1) + Occurs when operating with backoff max power for (Remain Time - P) SAR (backoff max SAR in Table 1) P X normal max SAR + (Remain Time - P) X backoff max SAR
- the Tx Room in the condition may be a value obtained by subtracting the current accumulated SAR from the Max accumulated SAR.
- (Remain Time - P) in the condition may be T - average time - P, and may be, for example, the future time point described in FIGS. 4A to 4E.
- P may mean a current point in time.
- Average time may mean a point in the past. Satisfying the condition may mean that there is no table in which the cumulative SAR exceeds the maximum cumulative SAR even when the electronic device 101 sets the maximum transmission power of normal max power for time P.
- the fact that the condition is not satisfied may mean that if the electronic device 101 sets the maximum transmit power of normal max power during P time, there is a possibility that a table in which the accumulated SAR exceeds the Max accumulated SAR may exist. In this case, the electronic device 101 may set the backoff max power as the maximum transmit power during P time.
- Table 2 is an example of variables and conditions.
- the SAR generation of (Remain time - P) may be 49.5 mW/g as 49.5 seconds X 1 mW/g.
- the cumulative SAR during P and (Remain time - P) exceeds the Tx room at 50.5 mW/g, which eventually confirms that a backoff of the maximum transmit power value at time P is required.
- FIG. 3B describes transmission power associated with one RAT. For example, referring to FIG. 3B, up to A seconds (eg, 50 seconds), the maximum transmit power may be set to normal max power (351), but after A seconds, backoff to backoff max power (352) It can be seen that it is off.
- the slope of the second portion 362 of the accumulated SAR may be smaller than the slope of the first portion 361 of the accumulated SAR according to the backoff of the maximum value of the maximum transmit power.
- the average SAR 331 before A seconds exceeds the average SAR limit 340, it can be confirmed that the average SAR 332 is equal to the value of the average SAR limit 340 at 100 seconds according to the backoff.
- a case may occur when the electronic device 101 transmits RF signals for two or more RATs.
- the electronic device 101 may transmit a first RF signal based on E-UTRA and a second RF signal based on NR according to EN-DC.
- the electronic device 101 may back off the maximum value of the transmit power of the RF signal so that the accumulated SAR does not exceed the accumulated max SAR.
- the electronic device 101 may set priorities of RATs to be backoff. For example, the electronic device 101 may be configured to preferentially back off the transmission power of an RF signal based on NR, which is an RAT corresponding to SCG, rather than E-UTRA, which is a RAT corresponding to MCG.
- EN-DC is exemplary, and if it is NE-DC, the electronic device 101 may be configured to preferentially back off the maximum value of the transmission power of the RF signal based on E-UTRA. In DC, backing off the maximum value of transmit power of the RF signal based on SCG preferentially is also exemplary, and there is no limitation on the priority of backoff.
- FIG. 5 is a block diagram illustrating a plurality of transmission paths of an electronic device according to various embodiments.
- At least one of the communications processors transmits a baseband signal to RFIC 503 (e.g., at least one of first RFIC 222, second RFIC 224, third RFIC 226, or fourth RFIC 228), and/or a baseband signal.
- band signal can be received.
- the RFIC 503 may process RF signals corresponding to two or more RF paths, for example.
- the RF path may include, for example, at least one piece of hardware (eg, at least one of an RFIC, RFFE, or antenna) for transmitting an RF signal.
- the RFCI 503 may receive two or more baseband signals from the communication processor 501 and generate two or more RF signals corresponding to each.
- Two or more RF signals may have different frequency bands, for example, but is not limited thereto.
- At least one of generating, providing, or inputting two or more RF signals to an antenna may be performed so as to overlap at least partially, and this may be referred to as 2 TX.
- the RFIC 503 is shown as one module in the example of FIG. 5, it will be appreciated by those skilled in the art that this is exemplary and that the RFIC 503 may be implemented with a plurality of modules for each RF signal.
- Two or more RF signals may be generated, for example, based on ENDC, MRDC of NEDC, or based on a dual-sim DSDA mode, and the types of the plurality of RF signals are not limited.
- the RFIC 503 may provide the first RF signal to the first RFFE 505 .
- the RFIC 505 may provide the second RF signal to the second RFFE 507 .
- the first RFFE 505 may process (eg, amplify) and provide the received first RF signal.
- the second RFFE 507 may process (eg, amplify) the received second RF signal and provide the second RF signal.
- the RFFEs 505 and 507 may amplify received RF signals to an amplification degree determined by external (eg, communication processor 501) control.
- the communication processor 501 may determine the degree of amplification of the RFFEs 505 and 507 based on the maximum transmit power limit and/or transmit power determined as described above. Although not shown, the amplification degree of the RFFEs 505 and 507 may be controlled based on an average power tracking (APT) module and/or an envelope tracking (ET) module. According to various embodiments, one RFFE may perform processing of a plurality of RF signals.
- APT average power tracking
- ET envelope tracking
- the first RFFE 505 may be connected to a single pole double throw (SPDT) switch 509, and an output end of the SPDT switch 509 may be connected to the switch 511.
- the switch 511 may be configured to selectively connect an output end 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 single pole 4 throw (SP4T) switch 513 .
- the SP4T switch 513 may be configured to selectively connect the output terminal of the second RFFE 507 to one of the SPDT switch 509, the third antenna 523, and the fourth antenna 524.
- the antennas 521 , 522 , 523 , and 524 may be disposed on the outer surface of the housing of the electronic device 101 , but are not limited thereto. In one example, it may be assumed that the antennas 521 and 522 are disposed on one side (eg, upper end) of the housing of the electronic device 101, and the antennas 523 and 524 are disposed on the other side (eg, lower end) of the housing of the electronic device 101.
- the distance between the antennas 521 and 522 may be shorter than the distance between the first antenna 521 and the third antenna 523, the distance between the first antenna 521 and the fourth antenna 524, the distance between the second antenna 522 and the third antenna 523, or the distance between the second antenna 522 and the fourth antenna 524.
- the distance between the antennas 523 and 524 may be shorter than the distance between the third antenna 523 and the first antenna 521, the distance between the third antenna 523 and the second antenna 522, the distance between the fourth antenna 524 and the first antenna 521, or the distance between the fourth antenna 524 and the second antenna 522.
- at least two RF signals may be simultaneously input to one antenna. For example, at least a portion of the RF signal of the B5 frequency band and the RF signal of the N2 frequency band may be simultaneously input to the first antenna 521 .
- Equation 1 whether it is determined whether the SAR restriction rule is violated based on the sum of exposures (e.g., SAR and/or PD) generated by a plurality of antennas, or whether the exposure caused by the plurality of antennas is independently determined whether or not the SAR restriction rule is violated can be determined by Equation 1 below.
- Equation 1 SAR 1 is SAR generated by one antenna, and SAR 2 is SAR generated by another antenna, and its unit may be, for example, W/kg.
- the R for the sum of the various SARs can be shown in Table 3, for example. Meanwhile, the values of 1.5 and 0.04 in Equation 1 are merely illustrative and not limited.
- the separation distance may be less than 143 mm.
- the separation distance may be 143 mm or more.
- antennas for which the sum of SARs are considered e.g., a pair of the first antenna 521 and the second antenna 522, or a pair of the third antenna 523 and the fourth antenna 524) for which the sum of SARs is considered in order to determine whether the SAR rule is violated can be expressed as being included in the same antenna group.
- the distance between antennas is relatively small (eg, smaller than the distance related to Equation 1), they may be included in the same antenna group.
- antennas for which independent SARs, rather than the sum of SARs, are considered in order to determine whether the SAR rule is violated eg, a pair of the first antenna 521 and the third antenna 522, a pair of the first antenna 521 and the fourth antenna 524, a pair of the second antenna 522 and the third antenna 522, or a pair of the second antenna 522 and the second antenna 522 and 4 pairs of antennas 524) can be expressed as being included in different antenna groups.
- the distance between the antennas is relatively large (eg, greater than the distance related to Equation 1), they may be included in different antenna groups.
- the back-off of the maximum transmit power limit for at least one antenna when the antennas for 2TX are included in the same antenna group may be performed earlier than the back-off of the maximum transmit power limit for at least one antenna when the antennas for 2TX are included in different antenna groups.
- back-off of the maximum transmit power limit at the current time may be performed.
- the sum of the expected SARs at the current time and / or future time point is the sum of the expected SARs at the current time point and / or future time point for one antenna and the other antenna. It can be set to the sum of the expected SARs at the current time point and / or future time point. Accordingly, if the sum of the cumulative SAR for both antennas, the expected SAR for one antenna at the current time and/or the future time, and the expected SAR at the current time and/or future time for the other antenna exceeds the Max cumulative SAR, back-off of the maximum transmit power limit at the current time can be performed.
- the antennas are included in different antenna groups, if the sum of the cumulative SAR for one antenna and the expected SAR at the current time and / or the future time for one antenna exceeds Max cumulative SAR, the maximum transmit power limit back-off at the current time point is performed, or if the sum of the cumulative SAR for another antenna and the expected SAR at the current time and / or future time point for another antenna exceeds Max cumulative SAR, back-off of the maximum transmit power limit at the current time point is performed.
- the back-off of the maximum transmit power limit for at least one antenna when the antennas for 2TX are included in the same antenna group may be performed earlier than the back-off of the maximum transmit power limit for at least one antenna when the antennas for 2TX are included in different antenna groups.
- the distance between antennas for 2TX may be changed.
- antennas for 2TX may be included in different antenna groups when the foldable device is unfolded, and antennas for 2TX may be included in the same antenna group when the foldable device is folded.
- the electronic device 101 may set a condition for determining whether to back off at least one of the maximum transmission power limits of an RF signal through antennas for 2TX based on the state of the housing. Accordingly, the SAR violation condition may not be violated.
- a condition for determining whether to back off corresponding to the case in which antennas for 2TX are included in the same antenna group may be used, or in a state in which the foldable device is unfolded, a condition for determining whether to back off corresponding to the case in which antennas for 2TX are included in different antenna groups may be used. Accordingly, a back-off time point for any one RF path may be delayed or the back-off may not be performed, so that more stable communication may be possible.
- FIG. 6A is a diagram illustrating a change in a state of a housing of an electronic device according to various embodiments. The embodiment of FIG. 6A will be described with reference to FIGS. 6B and 6C. 6B and 6C are diagrams illustrating distances between antennas according to various embodiments.
- the electronic device 101 may include a first housing 601 , a second housing 602 , a hinge structure 603 , and a display module 190 .
- the first housing 601, the second housing 602, and/or the hinge structure 603 may be referred to as the housing 600, but the components included in the housing 600 are not limited.
- the first part 190a of the display module 190 may be seated in the first housing 601 (or may be visually exposed through an opening formed by the first housing 601), and the second part 190b of the display module 190 may be seated in the second housing 602 (or visually exposed through an opening formed by the second housing 602). At least a portion of the first portion 190a and at least a portion of the second portion 190b may be flexible.
- the hinge structure 603 may include a mechanical structure that allows the first housing 601 to rotate relative to the second housing 602 .
- the state of at least one housing eg, the first housing 601 and the second housing 602
- the first state eg, a fully unfolded state
- the first part 190a of the display module 190 and the second part 190b of the display module 190 may face substantially the same direction.
- FIG. 6B shows antennas when at least one housing (eg, the first housing 601 and the second housing 602) is in a first state (eg, a fully unfolded state).
- the first antenna 621 , the second antenna 622 , and the third antenna 623 may be included in the first antenna group 631 .
- a threshold distance eg, a threshold distance according to Equation 1 established based on sum SAR
- the distance between the second antenna 622 and the third antenna 623 is less than the threshold distance
- the distance between the first antenna 621 and the third antenna 623 is less than the threshold distance
- the first antenna 621, The second antenna 622 and the third antenna 623 may be included in the first antenna group 631 .
- the fourth antenna 611 , the fifth antenna 612 , and the sixth antenna 613 may be included in the second antenna group 632 .
- the distance between the fourth antenna 611 and the fifth antenna 612 is less than the threshold distance
- the distance between the fifth antenna 612 and the sixth antenna 613 is less than the threshold distance
- the distance between the fourth antenna 611 and the sixth antenna 613 is less than the threshold distance
- the fourth antenna 611, the fifth antenna 612, and the sixth antenna 613 are 2 may be included in the antenna group 632.
- the distance between the third antenna 623 included in the first antenna group 631 and the sixth antenna 613 included in the second antenna group 632 may be the shortest distance among the distances between the antennas of the different antenna groups 631 and 632, respectively.
- a distance between the third antenna 623 and the sixth antenna 613 may be greater than or equal to a critical distance.
- the electronic device 101 determines the cumulative SAR of the first RF signal, the accumulated SAR of the second RF signal, the expected SAR at the present and/or future time of the first RF signal, and the present and/or future time of the second RF signal according to 2TX based on the same antenna group.
- the sum of expected SARs at a point in time exceeds the Max cumulative SAR, back-off of the maximum transmit power limit at the current point in time may be performed.
- the electronic device 101 calculates the cumulative SAR of the first RF signal, the accumulated SAR of the second RF signal, the expected SAR of the first RF signal at the present time and/or the future time point, and the prediction at the present time and/or future time point of the second RF signal according to 2TX based on the same antenna group.
- the sum of the SARs to be is greater than the Max cumulative SAR, back-off of the maximum transmit power limit at the current time point may be performed.
- the electronic device 101 determines whether the maximum transmit power limit is back-off based on the sum of accumulated SARs for each RF path and the sum of expected SARs at present and/or future time points. can be judged independently.
- the first housing 601 may rotate relative to the second housing 602, and in this case, at least a portion of the display module 190 may be folded.
- the state of at least one housing e.g., first housing 601 and second housing 602 may be expressed as being in a second state (e.g., a state different from the first state and/or the third state).
- the second state is a state different from the first state and/or the third state, for example, the angle (or relative position) between the housings 601 and 602 may be different from the angle (or relative position) between the housings 601 and 602 in the first state and/or the third state.
- the second state is an intermediate state between the unfolded state and the folded state, and may be named, for example, a half-folded state or a transition state.
- the first housing 601 may further rotate relative to the second housing 602, and in this case, at least a portion of the display module 190 may be further folded.
- the state of at least one housing eg, the first housing 601 and the second housing 602
- the state of at least one housing may be expressed as being in a third state (eg, a folded state).
- the first part 190a of the display module 190 and the second part 190b of the display module 190 may substantially face each other.
- 6C shows antennas when the state of at least one housing (eg, the first housing 601 and the second housing 602) is in a third state (eg, a folded state).
- a third state eg, a folded state
- the entire distance between two pairs of antennas 611 , 612 , 613 , 621 , 622 , and 623 may be less than the threshold distance.
- the third antenna 623 and the sixth antenna 613 are included in different antenna groups, but in the third state, the third antenna 623 and the sixth antenna 613 may be included in the same group.
- the accumulated SAR of the first RF signal, the accumulated SAR of the second RF signal, the expected SAR of the first RF signal at the present time and/or the future time point, and the expected SAR of the second RF signal at the present time and/or future time point according to 2TX based on the same antenna group If the sum of the max cumulative SAR exceeds the max cumulative SAR, back-off of the maximum transmission power limit at the current time point may be performed.
- a criterion for determining whether to back off may be dynamically changed according to a change in the state (eg, shape) of the housing, and the electronic device 101 according to various embodiments may determine whether the maximum transmit power limit is back off based on the state of the housing.
- the angle between the first housing 601 and the second housing 602 may be required to be greater than or equal to a critical angle.
- the critical angle may be set differently according to the size of the electronic device 101 .
- a critical distance R may be required to satisfy Equation 1, and the angle between the first housing 601 and the second housing 602 satisfying the critical distance R may be different depending on the size of the electronic device 101.
- the electronic device 101 may define only two housing states (eg, an unfolded state and a folded state), and the housing state may be determined according to whether an angle between the housings 601 and 602 is greater than or equal to a critical angle.
- the threshold angle may be set to be relatively small as the size of the electronic device 101 is relatively large, but is not limited thereto.
- FIG. 7A is a flowchart illustrating a method of operating an electronic device according to various embodiments. The embodiment of FIG. 7A will be described with reference to FIG. 7B. 7B illustrates a table of transmission power per time according to various embodiments.
- the electronic device 101 may determine to transmit an RF signal through the first RF path in operation 701.
- the first RF path may be selected based on, for example, a frequency band for an RF signal, but the selection method and/or criterion is not limited.
- the electronic device 101 may check the state of at least one housing. In one example, the electronic device 101 may identify a state defined in association with the relative position (or arrangement direction) of at least one housing as the state of the housing.
- the electronic device 101 may identify an unfolded state (or first state), a half-unfolded state (or second state), and a folded state (or third state) as the state of the housing, and the number of states and/or the expression method are not limited.
- the processor 120 (or the application processor) may obtain sensing data (eg, magnetic sensing data, but not limited to) for determining at least one of the degree of rotation of the hinge structure 603, the angle between the housings 601 and 602, or the distance between the parts 190a and 190b from the sensor module 176 (eg, but not limited to, a magnetic sensor).
- the processor 120 may determine the state of the housing based on the sensed data and provide it to a communication processor (eg, at least one of the first communication processor 212, the second communication processor 214, or the integrated communication processor 260).
- a communication processor eg, at least one of the first communication processor 212, the second communication processor 214, or the integrated communication processor 260.
- information on an antenna group including each of the antennas may be previously stored in correspondence with each of the states of the housing.
- the communication processor may identify an antenna group including the first RF path in response to the checked housing state.
- the electronic device 101 may check a numerical value indicating a relative position (or arrangement direction) between at least one housing as the state of the housing.
- the electronic device 101 may check at least one of the degree of rotation of the hinge structure 603, the distance between the parts 190a and 190b, and the angle between the housings 601 and 602 as the state of the housing.
- the processor 120 (or application processor) may determine at least one of the degree of rotation of the hinge structure 603, the distance between the parts 190a and 190b, or the angle between the housings 601 and 602, based on the sensing data from the sensor module 176, which is determined by a communication processor (eg, the first communication processor 212, the second communication processor 214, or the integrated communication processor 260). ) at least one of) may be provided.
- a communication processor eg, the first communication processor 212, the second communication processor 214, or the integrated communication processor 260.
- information about an antenna group including each of the antennas may be stored in advance, for example, corresponding to each of a plurality of numerical values (or ranges of numerical values). Based on the corresponding information, the communication processor may identify an antenna group including the first RF path in response to the checked housing state.
- the communication processor may identify an antenna group including the first RF path in response to the checked housing state.
- the electronic device 101 determines the maximum transmit power limit corresponding to the first RF path based on whether the accumulated SAR for the first RF path satisfies the maximum transmit power limit back-off condition associated with the antenna group determined according to the checked housing state.
- the electronic device 101 may control at least one RF circuit to transmit an RF signal based on the transmission power set based on the maximum transmission power limit.
- the electronic device 101 may identify an antenna group corresponding to the first RF path based on the state of at least one housing. For example, the electronic device 101 may manage accumulated SAR for each antenna group.
- the electronic device 101 If there is a history of transmission of another RF signal through at least some of the antennas included in the antenna group corresponding to the first RF path, and/or transmission is scheduled, the electronic device 101 additionally considers the previously generated SAR and/or the scheduled SAR based on the other RF signal to determine whether to back off the maximum transmit power limit. If there is no history of transmission of another RF signal through at least some of the antennas included in the antenna group corresponding to the first RF path, and transmission of another RF signal is not scheduled, the electronic device 101 may determine whether to back off the maximum transmit power limit by considering the SAR that has already occurred and/or is scheduled to occur based on the RF signal.
- the electronic device 101 may check the k-th SAR table 760 corresponding to the first RF path. For example, in the first antenna group, SAR due to other RF signals does not occur with respect to time points (past time, present time, and future time) included in the k-th SAR table 760, and it is assumed that SAR due to other RF signals is not scheduled to occur. Accordingly, only the SAR based on the first RF path may be considered for the corresponding antenna group.
- the k-th SAR table 760 may include D1, which is the accumulated SAR value 761 at at least one past time point 711 associated with the first RF path, the maximum SAR value 762 (D2) at the current time point 712, and the predicted SAR value 763 (D3) at at least one future time point 713.
- D1 is the accumulated SAR value 761 at at least one past time point 711 associated with the first RF path
- the maximum SAR value 762 (D2) at the current time point 712
- the predicted SAR value 763 (D3) at at least one future time point 713.
- the accumulated value of SAR corresponding to at least one past time point 711 may be D1.
- the electronic device 101 may use the maximum SAR value S1 for the current time point 712 .
- the maximum SAR value S1 (eg, normal max SAR of Table 1) may be a SAR value corresponding to the maximum transmission power designated by the electronic device 101 (eg, normal max power of Table 1).
- the electronic device 101 may calculate the sum of the SAR values S2 (eg, the backoff max SAR of Table 1) for the backoff transmit power (eg, the backoff max power of Table 1) for at least one future time point 713.
- the electronic device 101 may check D3 as the accumulated SAR for at least one future time point 713 .
- the number of at least one future viewpoint may be k-1. Accordingly, the electronic device 101, in the k-th table, determines whether D1+D2+D3, the sum of SARs for N time points consisting of N-k past time points, 1 present time point, and k-1 future time points, is greater than the SAR maximum cumulative SAR.
- the electronic device 101 may back off the transmission power at the current time. As described above, when an RF signal is transmitted only through the first RF path in the antenna group, whether to back off the maximum transmit power limit can be determined based on the k-th SAR table 760 corresponding to the first RF path.
- the electronic device 101 may check the k-th SAR table 770 corresponding to the second RF path. For example, it is assumed that another RF signal has been transmitted from the second RF antenna (or the second RF path) of the first antenna group included in the first RF path and is scheduled to be transmitted. As the first RF path and the second RF path are included in one antenna group, both the SAR associated with the first RF path and the SAR associated with the second RF path may need to be considered when determining whether to back off the maximum transmit power limit.
- the accumulated value of SAR by other RF signals corresponding to at least one past time point 721 associated with the second RF path may be D4.
- the viewpoints 711 of the first RF path may be substantially the same as the viewpoints 721 associated with the second RF path
- the viewpoints 712 of the first RF path may be substantially identical to the viewpoints 722 associated with the second RF path
- the viewpoints 713 of the first RF path may be substantially identical with the viewpoints 723 associated with the second RF path.
- the electronic device 101 may use the maximum SAR value S1 for another RF signal based on the second RF path at the current time point 722 .
- the maximum SAR value S1 (eg, normal max SAR of Table 1) may be a SAR value D5 corresponding to the maximum transmission power designated by the electronic device 101 (eg, normal max power of Table 1).
- the electronic device 101 can calculate the SAR value S2 (eg, backoff max SAR of Table 1) for the backoff transmit power (eg, backoff max power of Table 1) for another RF signal based on the second RF path.
- the electronic device 101 may check D6 as the accumulated SAR for at least one future time point 723 .
- the SAR of D1 has occurred at at least one past time point 711
- the SAR of D2 is expected at the current time point
- the SAR of D3 at a future time point can be predicted.
- the SAR of D4 has occurred at at least one past time point 721
- the SAR of D5 is expected at the current time point
- the SAR at D6 can be predicted at the future time point. Accordingly, when only the first RF path is included in the antenna group, whether to back off the maximum transmit power limit may be determined based on the table 760 including D1, D2, and D3 associated with the first RF path.
- whether to back off the maximum transmit power limit may be determined based on the table 770 for at least a part of the SARs D1, D2, and D3 associated with the first RF path and the SARs D4, D5, and D6 associated with the second RF path.
- the electronic device 101 may check the k-th SAR table 770 corresponding to the antenna group including the first RF path and the second RF path.
- D1 + D4 which is the sum of the SAR accumulation value D1 at at least one past time point 711 of the first RF path and the SAR accumulation value D4 by other RF signals at at least one past time point 721 of the second RF path, can be identified as the SAR accumulation value 771 corresponding to the past time point.
- the electronic device 101 may check, for example, D2+D5, which is the sum of the maximum SAR value 762 (D2) of the current time point 712 of the first RF path and the maximum SAR value (D5) of the current time point 722 of the second RF path, as the SAR value 772 at the current time point in the k-th SAR table 770.
- the electronic device 101 may check the maximum SAR value 762 (D2) of the current time point 712 of the first RF path as the SAR value 772 at the current time point in the k-th SAR table 770. This may mean that it is assumed that no other RF signal is transmitted through the second RF path at the present time.
- the electronic device 101 for example, D3 + D6, which is the sum of D3 of the future time point 713 of the first RF path and D6 of the future time point 723 of the second RF path, can be checked as the SAR value 773 at the future time point in the k-th SAR table 770.
- the electronic device 101 may check D3, which is the SAR of the future time point 713 of the first RF path, as the SAR value 773 at the future time point in the k-th SAR table 770. This may mean that it is assumed that no other RF signal is transmitted through the second RF path in the future.
- the electronic device 101 responds to the maximum transmit power limit (or transmit power) corresponding to the RF signal and/or to another RF signal based on whether D1 + D2 + D3 + D4 + D5 + D6 (or D1 + D2 + D3 + D4 in another example), which is the sum of the SAR value 771 at the past time point, the SAR value 772 at the present time point, and the SAR value 773 at the future time point, exceeds the threshold value Th. It is possible to back off the maximum transmit power limit (or transmit power).
- the cumulative amount and the expected amount of SAR have been described, this is an example for the case where the RF signal is, for example, 6 GHz or less, and for RF signals exceeding 6 GHz, PD (power density) will be understood that it can be used interchangeably and / or additionally.
- the electronic device 101 may simultaneously transmit at least an RF signal of 6 GHz or less and an RF signal of more than 6 GHz. In this case, the electronic device 101 may determine whether to back off the maximum transmission power limit by simultaneously using SAR and PD.
- FIG. 8 is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- the electronic device 101 may determine to transmit RF signals through a first RF path corresponding to the first antenna and a second RF path corresponding to the second antenna, in operation 801.
- the electronic device 101 may check whether the distance between the first antenna corresponding to the first RF path and the second antenna corresponding to the second RF path is less than a threshold distance.
- the threshold distance here may be a threshold distance for determining whether the first antenna and the second antenna are included in the same antenna group.
- the operation of checking whether the first antenna and the second antenna in operation 803 are less than the threshold distance may be replaced with an operation of checking whether the first antenna and the second antenna are included in the same antenna group, and in the embodiments of the present disclosure, those skilled in the art will understand that both operations can be performed interchangeably.
- the electronic device 101 determines whether the sum of the first accumulated SAR corresponding to the first RF path and the second accumulated SAR corresponding to the second RF path satisfies the maximum transmit power limit back-off condition. It is possible to determine whether to decrease at least one of the second maximum transmit power limits. As described above, when the distance between the first antenna and the second antenna is less than the threshold distance, the accumulated SAR of the first RF path and the accumulated SAR of the second RF path can be used to determine whether the maximum transmit power limit back-off condition is satisfied.
- the electronic device 101 may determine that at least one of the first maximum transmit power limit corresponding to the first RF path or the second maximum transmit power limit corresponding to the second RF path be reduced.
- the electronic device 101 may not perform back-off for the first maximum transmit power limit corresponding to the first RF path and the second maximum transmit power limit corresponding to the second RF path.
- the electronic device 101 transmits the first RF signal based on the first transmit power set based on the first maximum transmit power limit, and controls the at least one RF circuit to transmit the second RF signal based on the second transmit power set based on the second maximum transmit power limit.
- the electronic device 101 when the distance between the first antenna and the second antenna is greater than or equal to the threshold distance (803 - No), the electronic device 101, in operation 809, the first cumulative SAR corresponding to the first RF path. Depending on whether or not the maximum transmit power limit back-off condition is satisfied, the electronic device 101 may determine whether the first maximum transmit power limit is decreased. In operation 811, the electronic device 101 may check whether the second maximum transmit power limit is decreased according to whether the second accumulated SAR corresponding to the second RF path satisfies the maximum transmit power limit back off condition.
- the electronic device 101 may determine to reduce the first maximum transmit power limit corresponding to the first RF path.
- the electronic device 101 may not perform back-off for the first maximum transmit power limit corresponding to the first RF path. For example, when the sum of the accumulated SAR of the second RF path and the SAR expected to occur at the current time and/or the future time for the second RF path exceeds a threshold SAR, the electronic device 101 may determine to reduce the second maximum transmit power limit corresponding to the second RF path.
- the electronic device 101 may not perform back-off for the second maximum transmit power limit corresponding to the second RF path.
- the electronic device 101 transmits the first RF signal based on the first transmit power set based on the first maximum transmit power limit, and controls the at least one RF circuit to transmit the second RF signal based on the second transmit power set based on the second maximum transmit power limit.
- FIG. 9 is a flowchart illustrating a method of operating an electronic device according to various embodiments. The embodiment of FIG. 9 will be described with reference to FIG. 10 .
- 10 is a diagram for explaining a SAR event according to various embodiments.
- the electronic device 101 may determine to transmit an RF signal through the first RF path in operation 901.
- the electronic device 101 may check the state of the housing. Since confirmation of the state of the housing has been described above, the description will not be repeated here.
- the electronic device 101 in operation 905, may check the SAR event. For example, referring to FIG. 10 , either a first event 922 or a second event 923 may be detected for a first antenna group 921 .
- the first event 922 may be a head SAR event, which may be an event in which an RF signal is transmitted through an antenna proximate to the user's head.
- the second event 923 may be a non-head SAR event, which may be an event in which an RF signal is transmitted through an antenna proximate to another body part (e.g., a hand) other than the user's head.
- the event may represent the type of a body part contacted by the electronic device 101, but this is exemplary and not limited.
- whether the maximum transmit power limit of the RF path associated with the first event 922 is back off may be determined according to whether the sum of the cumulative SAR associated with the first event 922 and the expected SAR at present and/or future time points exceeds a threshold SAR. In addition, independently of the first event 922, whether the sum of the cumulative SAR associated with the second event 923 and the expected SAR at present and/or future time points exceeds a threshold SAR determines whether the maximum transmit power limit of the RF path associated with the second event 923 is back off.
- the electronic device 101 can independently manage the accumulated SAR and/or expected SAR associated with the first event 922 and the accumulated SAR and/or expected SAR associated with the second event 923 even within the first antenna group 921.
- the electronic device 101 can independently manage the accumulated SAR and/or expected SAR associated with the first event 932 and the accumulated SAR and/or expected SAR associated with the second event 933 even within the second antenna group 931.
- the electronic device 101 may check the maximum transmit power limit corresponding to the first RF path based on whether or not the accumulated SAR for the first RF path satisfies the maximum transmit power limit back-off condition corresponding to the antenna group and the SAR event determined according to the checked housing state.
- the electronic device 101 may control at least one RF circuit to transmit an RF signal based on the transmission power set based on the maximum transmission power limit. For example, in connection with the example of FIG. 10, the electronic device 101 assumes that the antenna group corresponding to the first RF path is determined as the first antenna group 921 according to the housing state, and the first event 922 (e.g., head SAR event) is detected.
- the first event 922 e.g., head SAR event
- the electronic device 101 may determine whether the maximum transmit power limit is back off based on whether the sum of the cumulative SAR and the expected SAR generated while the first event 922 (e.g., head SAR event) is detected in the first antenna group 921 exceeds a threshold SAR. If the electronic device 101 determines the antenna group corresponding to the first RF path as the first antenna group 921 according to the housing state and detects the second event 923 (eg, non-head SAR event), the electronic device 101 calculates the sum of accumulated SAR and expected SAR generated while the second event 923 (eg, non-head SAR event) is detected in the first antenna group 921. Based on whether SAR exceeds the threshold SAR, it may be determined whether the maximum transmit power limit is back off.
- the threshold SAR it may be determined whether the maximum transmit power limit is back off.
- the electronic device 101 may determine whether the maximum transmission power limit is back off in consideration of the antenna group and the event, but this is exemplary. As described in another embodiment, the electronic device 101 may determine whether the maximum transmit power limit is back off by considering only the antenna group. Alternatively, in another embodiment, the electronic device 101 may determine whether the maximum transmit power limit is back off by considering only the event. For example, an antenna group may be represented by being replaced with an event. For example, the fact that the first antenna and the second antenna are included in the first antenna group may be replaced with the first antenna and the second antenna corresponding to the first event (eg, head SAR event).
- the first event eg, head SAR event
- 11A is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- the electronic device 101 may identify at least one first antenna group according to the first housing state in operation 1101.
- the first housing state may mean, for example, a state in which the angle between the first housing 601 and the second housing 602 is the first angle (or is included in the first range).
- the electronic device 101 may identify at least one first antenna group corresponding to the first housing state. In the first housing state, the number of first antenna groups may be plural.
- the electronic device 101 may set a plurality of antenna groups in the first housing state. The electronic device 101 may determine whether the maximum transmit power limit is back off for each of the at least one first antenna group.
- the electronic device 101 may check a change in the housing state.
- the electronic device 101 may check at least one second antenna group according to the second housing state.
- the second housing state may mean, for example, a state in which the angle between the first housing 601 and the second housing 602 is the second angle (or is included in the second range).
- the electronic device 101 may check at least one second antenna group corresponding to the second housing state.
- the electronic device 101 may update an antenna (or an RF path) included in each of the antenna groups according to a change in a housing state.
- the electronic device 101 may newly define an antenna group, and there is no limitation on a method of setting the antenna group.
- the number of second antenna groups may be plural.
- the electronic device 101 may set a plurality of antenna groups in the second housing state.
- the electronic device 101 may set antennas included in each of a plurality of antenna groups.
- the electronic device 101 may update antennas included in each of a plurality of antenna groups.
- the electronic device 101 may update one antenna group to include all antennas.
- the electronic device 101 may determine whether the maximum transmit power limit is back off for each of the at least one second antenna group.
- Each of the at least one second antenna group may inherit the accumulated SAR of the at least one first antenna group and/or may be newly updated.
- 11B is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- the electronic device 101 may check at least one first antenna group and at least one first event according to the first housing state in operation 1111.
- the electronic device 101 may check a change in the housing state.
- the electronic device 101 may check at least one second antenna group and at least one second event according to the changed housing state.
- at least one event may also be updated according to a change in the housing state.
- the first RF path (or antenna corresponding to the first RF path) may correspond to a head SAR event in the first housing state and respond to a non-head SAR event in the second housing state.
- the electronic device 101 may update an event according to a change in the housing state, and then determine whether the maximum transmission power limit is back off for the updated antenna group and event.
- FIG. 12 is a diagram for describing back-off of the maximum transmit power limit and restoration of the maximum transmit power limit according to various embodiments.
- the electronic device 101 may determine to transmit the first RF signal through the first RF path.
- a first maximum transmit power limit 1211 may be set.
- the first RF path is included in the first antenna group in the first housing state.
- the second RF signal is being transmitted through the second RF path in the first antenna group, and thus the second cumulative SAR for the second RF path exists.
- the electronic device 101 may determine whether the first maximum transmit power limit 1211 is back off based on SARs corresponding to the first RF path and the second RF path included in the first antenna group. For example, until before A second, the electronic device 101 may maintain the first maximum transmit power limit 1211 without backing off, based on the fact that the sum of the first accumulated SAR corresponding to the first RF path, the expected SAR corresponding to the first RF path, the second accumulated SAR corresponding to the second RF path, and the expected SAR corresponding to the second RF path is less than or equal to the threshold SAR.
- the electronic device 101 may back off the maximum transmit power limit to the second maximum transmit power limit 1212 based on the fact that the sum of the first accumulated SAR corresponding to the first RF path, the expected SAR corresponding to the first RF path, the second accumulated SAR corresponding to the second RF path, and the expected SAR corresponding to the second RF path exceeds the threshold SAR.
- the housing state of the electronic device 101 may be changed from the first housing state to the second housing state.
- the electronic device 101 may change from a folded state to an unfolded state.
- the electronic device 101 may change the antenna group including the first RF path from the first antenna group to the second antenna group, and manage the second RF path to be included in the second antenna group.
- the electronic device 101 may determine whether the maximum transmit power limit for the second antenna group is back off. For example, the electronic device 101 determines whether to back off the maximum transmit power limit based on whether the sum of the first accumulated SAR corresponding to the first RF path and the expected SAR corresponding to the first RF path exceeds a threshold SAR.
- the electronic device 101 determines that the maximum transmit power limit corresponding to the first RF path is not backed off, and returns the maximum transmit power limit corresponding to the first RF path to the first maximum transmit power limit 1213.
- the average power limit (eg, 30 dBm) corresponding to the second antenna group may be set higher than the average power limit (eg, 19 dBm) corresponding to the first antenna group, and accordingly, the electronic device 101 determines that the maximum transmit power limit corresponding to the first RF path is not backed off, and restores the maximum transmit power limit corresponding to the first RF path to the first maximum transmit power limit 1213.
- the maximum transmission power limit may not be unnecessarily limited according to the change of the state of the housing. In particular, in the case of a foldable device, there are many cases in which a user performs a call after converting the housing to an unfolded state.
- the distance between the antennas disposed in the electronic device 101 may be increased compared to a state in which the housing is folded, so that the antennas are highly likely to be included in different antenna groups.
- the electronic device 101 may not back off the maximum transmission power limit when transmitting RF signals based on different antenna groups, and thus, stable communication may be possible.
- the electronic device 101 may set the average power limit corresponding to the first RF path to a first value (eg, 19 dBm) when the housing state is in a first state (eg, a folded state), and set the average power limit corresponding to the first RF path to a second value (eg, 30 dBm) when the housing state is in a second state (eg, unfolded state).
- a first value eg, 19 dBm
- a second value eg, 30 dBm
- the electronic device 101 determines whether the maximum transmit power limit of the first RF path is back off based on whether the sum of the first accumulated SAR and the expected SAR corresponding to the first RF path exceeds a threshold SAR.
- the critical SAR is a value set based on the first value (eg, 19dBm) (eg, the product of the first value X the number of time points in the time table), and may be a relatively low value. Accordingly, at second A, the electronic device 101 may back off the maximum transmit power limit from the first maximum transmit power limit 1211 to the second maximum transmit power limit 1212 based on the fact that the sum of the first accumulated SAR and the expected SAR corresponding to the first RF path exceeds the threshold SAR. Meanwhile, in the second housing state, the electronic device 101 determines whether the maximum transmission power limit of the first RF path is back off based on whether the sum of the first accumulated SAR and the expected SAR corresponding to the first RF path exceeds a threshold SAR.
- the first value eg, 19dBm
- the electronic device 101 may back off the maximum transmit power limit from the first maximum transmit power limit 1211 to the second maximum transmit power limit 1212 based on the fact that the sum of the first accumulated SAR and the expected S
- the threshold SAR is a value set based on the second value (eg, 30 dBm) (eg, the product of the second value X the number of time points in the time table), and may be a relatively high value. Accordingly, the electronic device 101 may return the maximum transmit power limit from the second maximum transmit power limit 1212 to the first maximum transmit power limit 1211 based on the fact that the sum of the first cumulative SAR and the expected SAR corresponding to the first RF path is less than or equal to the threshold SAR at B seconds when the state of the housing is changed.
- the second value eg, 30 dBm
- the electronic device 101 may return the maximum transmit power limit from the second maximum transmit power limit 1212 to the first maximum transmit power limit 1211 based on the fact that the sum of the first cumulative SAR and the expected SAR corresponding to the first RF path is less than or equal to the threshold SAR at B seconds when the state of the housing is changed.
- 13A is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- the electronic device 101 may allocate a first antenna to a first antenna group and a second antenna to a second antenna group in a first housing state (eg, an unfolded state) in operation 1301.
- a distance between the first antenna and the second antenna may be greater than or equal to a critical distance, and accordingly, each of the first antenna and the second antenna may be included in different antenna groups.
- the electronic device 101 may independently manage whether or not the maximum transmit power limit based on the SAR associated with the first antenna included in the first antenna group is back off and whether the maximum transmit power limit based on the SAR associated with the second antenna included in the second antenna group is back off.
- the electronic device 101 may allocate the first antenna and the second antenna to the first antenna group based on a change in the state of the housing from the first housing state to the second housing state (eg, a folded state).
- a change from the first housing state (e.g., unfolded state) to the second housing state (e.g., folded state) is merely illustrative, and, for example, a state change from a folded state to an unfolded state, from an unfolded state, to a half-folded state, etc. are all possible, and those skilled in the art will understand that the state change is not limited.
- the electronic device 101 may allocate the first antenna and the second antenna to the second antenna group based on the change of the housing state from the first housing state to the second housing state.
- the distance between the first antenna and the second antenna may be less than a critical distance, and thus the first antenna and the second antenna may be included in each of the same antenna groups.
- the electronic device 101 may maintain the first antenna included in the first antenna group and include the first antenna in the second antenna group.
- the electronic device 101 maintains the second antenna included in the second antenna group and may include the second antenna in the first antenna group as well.
- the electronic device 101 may manage whether to back off at least one maximum transmit power limit by considering the SAR associated with the first antenna included in the first antenna group and the SAR associated with the second antenna.
- the electronic device 101 may manage whether to back off at least one maximum transmit power limit by considering both the SAR associated with the first antenna included in the second antenna group and the SAR associated with the second antenna.
- 13B is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- the electronic device 101 may allocate a first antenna to the first antenna group and a second antenna to the second antenna group in a first housing state (eg, an unfolded state) in operation 1311.
- a first housing state eg, an unfolded state
- a distance between the first antenna and the second antenna may be greater than or equal to a critical distance, and accordingly, each of the first antenna and the second antenna may be included in different antenna groups.
- the electronic device 101 may independently manage whether or not the maximum transmit power limit based on the SAR associated with the first antenna included in the first antenna group is back off and whether the maximum transmit power limit based on the SAR associated with the second antenna included in the second antenna group is back off.
- the electronic device 101 may allocate the first antenna and the second antenna to the first antenna group based on a change in the state of the housing from the first housing state to the second housing state (eg, a folded state).
- the electronic device 101 may not allocate an antenna to the second antenna group based on the change of the housing state from the first housing state to the second housing state.
- the distance between the first antenna and the second antenna may be less than a critical distance, and thus the first antenna and the second antenna may be included in each of the same antenna groups.
- the electronic device 101 maintains the first antenna included in the first antenna group, includes the second antenna in the first antenna group, and excludes the second antenna from the second antenna group.
- the electronic device 101 may manage whether to back off at least one maximum transmit power limit by considering the SAR associated with the first antenna included in the first antenna group and the SAR associated with the second antenna.
- the second antenna may be newly included in the second antenna group. In this case, there is no accumulated SAR for the second antenna group, and accordingly, the back-off of the maximum transmit power limit may not be performed even for the second antenna included in the second antenna group.
- the second antenna group may be managed as having no cumulative SAR.
- back-off of the maximum transmission power limit for the first antenna may be performed.
- the electronic device 101 may determine whether the maximum transmit power limit for the second antenna is back off by considering the accumulated SAR associated with the second antenna newly included in the second antenna group. For example, the electronic device 101 may determine whether the maximum transmit power limit for the second antenna is back off based on whether the sum of the accumulated SAR and the expected SAR corresponding to the second antenna exceeds a threshold SAR.
- the existing accumulated SAR for the second antenna group may be managed to be inherited.
- FIG. 14 is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- the electronic device 101 may back off the maximum transmit power limit in operation 1401, based on the first cumulative SAR for the first RF path satisfying the maximum transmit power limit back off condition associated with the antenna group determined according to the confirmed housing state.
- another RF path may be included in the antenna group corresponding to the first RF path according to the housing state.
- the electronic device 101 may back off the maximum transmit power limit when the sum of the first cumulative SAR and the expected SAR corresponding to the first RF path and the sum of the cumulative SAR of other RF paths and the expected SAR of the other RF paths exceed a threshold SAR, the electronic device 101 may back off the maximum transmit power limit.
- the electronic device 101 may control at least one RF circuit to transmit an RF signal based on the transmission power set based on the back-off maximum transmission power limit.
- the electronic device 101 may check a change in the housing state.
- the electronic device 101 determines the maximum transmit power limit based on the fact that the second cumulative SAR for the first RF path does not satisfy the maximum transmit power limit back off condition associated with the antenna group determined according to the checked housing state.
- the second accumulated SAR is, for example, an accumulated SAR corresponding to the first RF path, and may have a different time interval and/or a different value from the first accumulated SAR over time.
- another RF path may not be included in the antenna group corresponding to the first RF path according to the housing state.
- the electronic device 101 may not back off the maximum transmit power limit.
- the electronic device 101 may control at least one RF circuit to transmit an RF signal based on the transmission power set based on the checked maximum transmission power limit. As described above, even when the housing state is changed, the electronic device 101 may determine whether to back off in consideration of the accumulated SAR (eg, the second accumulated SAR) of the first RF path.
- 15 is a diagram for explaining an antenna group in a half-folded state according to various embodiments.
- the electronic device 101 may determine that the housing is in a half-folded state. For example, when the angle between the first housing 601 and the second housing 602 is 90 degrees, the housing may be in a half-folded state, but the size of the angle is not limited.
- the electronic device 101 may set the first antenna group 1501 and the second antenna group 1502 in a half-folded state of the housing.
- the first antenna group 1501 may include antennas 611 , 612 , 613 , and 623 .
- the electronic device 101 may determine whether or not to back off the maximum transmit power limit corresponding to the antenna 611 based on whether the sum of the accumulated SAR and the expected SAR of the antennas 611, 612, 613, and 623 included in the first antenna group 1501 exceeds a threshold SAR.
- the second antenna group 1502 may include antennas 621 , 622 , and 623 .
- the electronic device 101 may determine whether or not to back off the maximum transmit power limit corresponding to the antenna 611 based on whether the sum of the cumulative SAR and the expected SAR of the antennas 621, 622, and 623 included in the second antenna group 1502 exceeds a threshold SAR.
- the antenna 623 may also be included in the first antenna group 1501 and may also be included in the second antenna group 1502, and may be referred to as a shared antenna.
- the RF signal when it is determined that the RF signal is to be transmitted through the antenna 623, based on whether the sum of the accumulated SAR and the expected SAR of the antennas 611, 612, 613, 621, 622, and 623 included in the first antenna group 1501 and the second antenna group 1502 exceeds a threshold SAR, whether or not the maximum transmit power limit corresponding to the antenna 611 is back-off may be determined.
- 16 is a diagram illustrating a distance between antennas of an electronic device according to various embodiments.
- antennas 1611 and 1613 may be disposed in the first housing 1610 of the electronic device 101, and antennas 1621 and 1622 may be disposed in the second housing 1620.
- the distance between the antenna 1611 and the antenna 1621 is D1
- the distance between the antenna 1613 and the antenna 1622 is D2.
- the electronic device 101 may determine to transmit the first RF signal through the antenna 1611 and transmit the second RF signal through the antenna 1621 .
- the SAR sum (sum SAR) of the first average SAR limit and the second average SAR limit may be a first value (e.g., 3.2 W/Kg in Table 3).
- 1 may be 143 mm or more, which is the minimum separation distance corresponding to the first value (eg, 3.2 W/Kg in Table 3), and accordingly, the antenna 1611 and the antenna 1621 may be included in different antenna groups 1632 and 1631, respectively, and the electronic device 101 may independently determine whether the antennas 1611 and 1621 are back off.
- the electronic device 101 may determine to transmit the first RF signal through the antenna 1613 and transmit the second RF signal through the antenna 1622. If the first average SAR limit is set for the first RF signal and the second average SAR limit is set for the second RF signal, the SAR sum of the first average SAR limit and the second average SAR limit (sum SAR) may be a first value (e.g., 3.2 W/Kg in Table 3). In this case, D2 may be less than 143 mm, which is the minimum separation distance corresponding to the first value (eg, 3.2 W / Kg in Table 3), and in this case, the antennas 1613 and 1622 are included in the same antenna group, and there is a possibility that back-off is performed relatively early.
- first value e.g., 3.2 W/Kg in Table 3
- the electronic device 101 may adjust the SAR sum (sum SAR) by adjusting the first average SAR limit for the first RF signal and/or the second average SAR limit for the second RF signal. For example, when the electronic device 101 adjusts the sum SAR to the second value (eg, 2.8 W/Kg in Table 3), the second value (eg, 2.8 W/Kg in Table 3).
- the minimum separation distance corresponding to may be 117 mm. D2 may be greater than or equal to 117 mm, and in this case, the antenna 1613 and the antenna 1622 may be included in the different antenna groups 1632 and 1631, respectively, and the electronic device 101 may independently determine whether the antennas 1613 and 1622 are back off.
- the electronic device 101 when antennas to transmit RF signals are determined, the electronic device 101 according to various embodiments adjusts at least one of the average SAR limits corresponding to each of the antennas based on the distance between the antennas, so that the antennas may be included in different antenna groups.
- the electronic device 101 may perform average SAR limit adjustment based on the change in the distance between the antennas 1611 and 1621 according to a change in the housing state.
- the distance between the antennas 1611 and 1621 in the unfolded state is D2
- the angle between the housings 1610 and 1620 changes the distance between the antennas 1611 and 1621 may change to a value smaller than D2.
- the electronic device 101 may determine a SAR sum (sum SAR) for which the antennas 1611 and 1621 are determined as different antenna groups, and may determine an average antenna limit for each of the antennas 1611 and 1621 for not satisfying the determined SAR sum (sum SAR). As described above, the electronic device 101 may determine the average antenna limit so that the antennas are included in different antenna groups according to housing conditions.
- sum SAR SAR sum
- 17 is a flowchart illustrating a method of operating an electronic device according to various embodiments.
- the electronic device 101 in operation 1701, it can be confirmed that a plurality of RF signals will be transmitted based on a plurality of RF paths.
- the electronic device 101 may check first distances between a plurality of antennas corresponding to a plurality of RF paths.
- the first SAR sum may be the sum of average SAR limits corresponding to each of the plurality of antennas, but is not limited thereto.
- the electronic device 101 determines whether the maximum transmit power limit is back off based on whether the first condition is satisfied in any one RF path among the plurality of RF paths.
- the first condition may be set corresponding to an average SAR limit corresponding to each of the plurality of antennas based on the first SAR sum, for example.
- the electronic device 101 may check the second SAR sum corresponding to the first distance in operation 1709. For example, the electronic device 101 may check the second SAR sum, which is the sum of SAR 1 and SAR 2 when R in Equation 1 is the first distance.
- the electronic device 101 may check the second condition corresponding to the average SAR limit corresponding to each of the plurality of antennas based on the second SAR sum. In operation 1711, the electronic device 101 may check whether the maximum transmit power limit is back off based on whether the second condition is satisfied in any one of the plurality of RF paths. As described above, when the currently set SAR sum (sum SAR) and the distance between the antennas do not satisfy Equation 1, the electronic device 101 may adjust the SAR sum (sum SAR) to satisfy Equation 1. Accordingly, the antennas may be included in different antenna groups, so that the back off of the maximum transmit power limit may be delayed or not performed.
- the electronic device 101 may adjust the sum SAR so that the antennas are included in different antenna groups even if the average SAR limit per antenna is reduced.
- FIGS. 18A and 18B illustrate top and side views of an electronic device according to various embodiments.
- the coordinates of the first point A of the electronic device 101 may be set to (0,0,0) and the coordinates of the second point B may be set to (80,0,0).
- the horizontal length of the first housing 1810 of the electronic device 101 may be 80, and the vertical length may be 80.
- Coordinates of the antennas 1801 and 1802 may be set as the coordinates of the first point A as the origin.
- the coordinates of the antenna 1801 may be the coordinates of the center point of the antenna 1801, and may be (40, 80, 0) in one example.
- the coordinates of the antenna 1802 may be the coordinates of the center point of the antenna 1802, which may be (40, -80, 0) in one example.
- the electronic device 101 may reset the coordinates of the antennas 1801 and 1802 based on the angle between the housings 1810 and 1820 . For example, as shown in FIG. 18B , when the angle between the first housing 1810 and the second housing 1820 is 110 degrees, the coordinates of the antenna 1802 may be fixed at (40, -80, 0). The electronic device 101 may check the coordinates of the antenna 1801 as (40, 27.4, 75.2). The electronic device 101 may check the distance d between both coordinates as 133 . For example, if the SAR sum (sum SAR) based on the average limit SAR allocated to both antennas 1801 and 1802 is 3.2 W/Kg, according to Table 3, the minimum separation distance may be 143.
- the electronic device 101 can allocate the antennas 1801 and 1802 to the same antenna group.
- the electronic device 101 may check the SAR sum corresponding to 133, which is the distance d between the antennas 1801 and 1802, based on Equation 1, and may allocate the antennas 1801 and 1802 to different antenna groups by setting the average SAR limit for each antenna 1801 and 1802 according to the SAR sum.
- the SAR sum corresponding to 133 which is the distance d between the antennas 1801 and 1802, may be 3.04 according to Equation 1, and the electronic device 101 may set the average SAR limit for each antenna 1801 and 1802 based on the SAR sum of 3.04.
- 19A and 19B illustrate top and side views of an electronic device according to various embodiments.
- the coordinates of the first point A of the electronic device 101 may be set to (0,0,0) and the coordinates of the second point B may be set to (80,0,0).
- the horizontal length of the first housing 1910 and the second housing 1920 of the electronic device 101 may be 80, and the vertical length may be 80.
- Coordinates of the antennas 1911 , 1912 , 1913 , 1921 , and 1922 may be set as the coordinates of the first point A as the origin.
- the coordinates of the antenna 1911 may be (0,60,0)
- the coordinates of the antenna 1912 may be (40,80,0)
- the coordinates of the antenna 1913 may be (80,72,0)
- the coordinates of the antenna 1921 may be (40,-80,0)
- the coordinates of the antenna 1922 may be (80,-72,0).
- the SAR sum (sum SAR) for 2TX may be set to 3.2 W/Kg, and the minimum separation distance corresponding to the corresponding SAR sum according to Table 3 may be 143.
- the minimum separation distance corresponding to the corresponding SAR sum according to Table 3 may be 143.
- the antenna 19B when the angle between the first housing 1810 and the second housing 1820 is 130 degrees, the coordinates of the antenna 1911 are (0,38.6,46.0), the coordinates of the antenna 1912 are (40,51.4,61.3), the coordinates of the antenna 1913 are (80,46.2,55.2), the antenna ( 1921) may be coordinates (40,-80,0), and the coordinates of the antenna 1922 may be (80,-72,0).
- the distance (d) between the antenna 1912 and the antenna 1921 may be 144, and may be larger than the minimum separation distance of 143. Accordingly, antenna 1912 and antenna 1921 may be included in different antenna groups.
- the antenna 1913 may be set as a shared antenna. Meanwhile, the SAR sum corresponding to the distance 130 between the antenna 1913 and the antenna 1912 (eg, 3 W / Kg) may be set so that the antenna 1913 and the antenna 1912 are also included in different antenna groups.
- 20A is a diagram of an electronic device capable of being folded multiple times according to various embodiments.
- 20B is a side view of an electronic device capable of being folded multiple times according to various embodiments.
- 20C illustrates a state in which an electronic device capable of being folded multiple times according to various embodiments is folded multiple times.
- the electronic device 101 may include a first housing 2010, a second housing 2020, a third housing 2030, a first hinge structure 2041, and a second hinge structure 2042.
- An angle between the first housing 2010 and the second housing 2020 may be changed based on the rotation of the first hinge structure 2041 .
- An angle between the second housing 2020 and the third housing 2030 may be changed based on the rotation of the second hinge structure 2042 .
- the first hinge structure 2041 may rotate so that the angle ⁇ 1 between the first housing 2010 and the second housing 2020 is changed so that the first housing 2010 is positioned relatively upward with respect to the second housing 2020.
- the second hinge structure 2042 may rotate so that the angle ⁇ 2 between the second housing 2020 and the third housing 2030 is changed so that the third housing 2030 is positioned relatively lower with respect to the second housing 2020.
- a fully unfolded state eg, a state in which an angle ⁇ 1 between the first housing 2010 and the second housing 2020 is substantially 180 degrees, and an angle ⁇ 2 between the second housing 2020 and the third housing 2030 is substantially 180 degrees
- the electronic device 101 is provided with antennas 2011 and 201 respectively. 2, 2013, 2031, 2032, 2033, 2034) coordinates can be set.
- the electronic device 101 may check the distances between the two antennas, and accordingly, the antennas 2012 and 2013 are allocated to the first antenna group 2051, the antennas 2031 and 2032 are allocated to the second antenna group 2052, the antenna 2011 is allocated to the third antenna group 2053, and the antennas 2033 and 2034 may be allocated to the fourth antenna group 2054. As described above, the electronic device 101 can independently determine whether the maximum transmission power limit is back off for each antenna group.
- the electronic device 101 based on the change in the angle ⁇ 1 between the first housing 2010 and the second housing 2020 and/or the change in the angle ⁇ 2 between the second housing 2020 and the third housing 2030, the antennas 2011, 2012, 2013, 2031, 2032, 2033, and 2034, respectively.
- the coordinates may be reset, and the distance between the two antennas may be checked based on the reset coordinates.
- the angle ⁇ 1 between the first housing 2010 and the second housing 2020 is substantially 0 degree
- the second housing 2020 and the third housing 2030 A state in which the angle ⁇ 2 is substantially 0 degree can be referred to as a folded state.
- the electronic device 101 may reset the coordinates of each of the antennas 2011 , 2012 , 2013 , 2031 , 2032 , 2033 , and 2034 .
- the electronic device 101 may check the distance between the antennas based on the reset coordinates.
- the electronic device 101 may allocate antennas 2011, 2034, and 2033 to one antenna group 2051, and allocate antennas 2012, 2013, 2031, and 2032 to another antenna group 2052.
- the electronic device 101 may independently determine whether the maximum transmit power limit is back off for each antenna group.
- 21 is a diagram of an electronic device according to various embodiments.
- the electronic device 101 may include a first housing 2110 and a second housing 2120 .
- a receiver (or speaker) may be disposed in the first housing 2110 .
- a grip sensor 2122 may be included in the second housing 2120 .
- the distance between the receiver 2121 and the grip sensor 2122 of the electronic device 101 may be relatively large.
- the grip sensor 2122 may detect the user's grip.
- the electronic device 101 may determine that a non-head SAR event has occurred.
- sensing proximity (or contact) by the grip sensor 2122 in the unfolded state may be identified as a non-head SAR event.
- a distance between the receiver 2121 and the grip sensor 2122 may be relatively small.
- the electronic device 101 may determine that a head-SAR event has occurred. For example, based on a relatively small distance between the grip sensor 2122 and the user's head, sensing proximity (or contact) by the grip sensor 2122 in a folded state may be identified as a head SAR event.
- the electronic device 101 may confirm that both the head-SAR event and the non-head SAR event have occurred. Meanwhile, in another embodiment, when the grip by the grip sensor 2122 in the unfolded state is sensed, the electronic device 101 may determine that a head SAR event has occurred, and if the grip by the grip sensor 2122 in the folded state is sensed, the electronic device 101 may determine that a non-head SAR event has occurred. For example, the electronic device 101 may have a form-factor in which communication is impossible in a folded state, and in this case, it may be confirmed that a non-head SAR event has occurred based on grip sensing in the folded state.
- the electronic device 101 may include a grip sensor 2122 (or proximity sensor) disposed at a position where the user's head approaches during a call.
- the electronic device 101 may be configured to determine that a head-SAR event has occurred based on grip sensing (or proximity sensing) of the grip sensor 2122 (or proximity sensor).
- the electronic device 101 may determine whether a head SAR event or a non-head SAR event has occurred based on whether the receiver 2121 is operating.
- the electronic device 101 may dynamically change an event according to a sensing result of the grip sensor 2122 as well as dynamically change the antenna group according to the state of the housing.
- the electronic device (eg, the electronic device 101) includes at least one housing (eg, the first housing 601, the second housing 602, the first housing 1610, the second housing 1620, the first housing 1810, the second housing 1820, the first housing 1910, the second housing 1920, and the first housing). 2010, the second housing 2020, the third housing 2030, the first housing 2110, or the second housing 2120), a plurality of antennas disposed on the at least one housing (eg, the first antenna module 242, the second antenna module 244, the third antenna module 246, the antennas 248, and the antennas 521 and 52).
- the first housing 601, the second housing 602, the first housing 1610, the second housing 1620, the first housing 1810, the second housing 1820, the first housing 1910, the second housing 1920, and the first housing 2010, the second housing 2020, the third housing 2030, the first housing 2110, or the second housing 2120), a plurality of antennas disposed on the at least one housing (eg, the first antenna module 242, the second antenna module 244, the third antenna module
- RF circuit
- the at least one processor determines that a second antenna corresponding to a second RF path for transmitting a second RF signal among the plurality of antennas and the first antenna are included in different antenna groups, as at least part of an operation of checking a maximum transmit power limit corresponding to the first RF path based on whether an accumulated SAR for the first RF path satisfies a maximum transmit power limit back off condition associated with an antenna group determined according to a state of the at least one housing. Therefore, based on whether the sum of the accumulated SAR for the first RF path and the SAR expected to occur for the first RF path exceeds a threshold SAR, the maximum transmit power limit corresponding to the first RF path. It can be set to check whether to back off.
- the at least one processor may be further configured to determine that the first antenna and the second antenna are included in each of the different antenna groups, based on satisfying a condition indicating that the distance between the first antenna and the second antenna is greater than or equal to a threshold distance in the at least one housing state.
- the at least one housing may include a first housing and a second housing
- the at least one processor may be further configured to obtain sensing data from at least one sensor for sensing a relative position between the first housing and the second housing, and to determine whether a condition indicating that a distance between the first antenna and the second antenna is greater than or equal to the threshold distance is satisfied based on the sensing data.
- the at least one processor may be further configured to determine the threshold distance based on a sum of a first average SAR limit configured for the first RF path and a second average SAR limit configured for the second RF path.
- the at least one processor as at least part of an operation of determining whether to back off the maximum transmit power limit corresponding to the first RF path based on whether the sum of the accumulated SAR for the first RF path and the SAR expected to occur for the first RF path exceeds a threshold SAR, based on the sum of the accumulated SAR for the first RF path and the SAR expected to occur for the first RF path is less than or equal to the threshold SAR, It can be set to ensure that the maximum transmit power limit corresponding to 1 RF path is not backed off.
- the at least one processor determines that the first antenna and the second antenna are included in one antenna group based on the change in the state of the at least one housing, and based on the fact that the first antenna and the second antenna are included in one antenna group, the accumulated SAR for the first RF path, the accumulated SAR for the second RF path, and the SAR expected to occur for the first RF path at a point in time after the state of the at least one housing is changed, and when a sum of SARs expected to occur with respect to the second RF path exceeds the threshold SAR, determine to back off the maximum transmit power limit corresponding to the first RF path and/or the maximum transmit power limit corresponding to the second RF path, the cumulative SAR for the first RF path, the accumulated SAR for the second RF path, the SAR expected to occur for the first RF path, and the second RF path at a point in time after the state of the at least one housing is changed.
- the sum of the SARs expected to occur for is less than or
- the at least one processor determines that the second antenna corresponding to the second RF path for transmitting the second RF signal among the plurality of antennas and the first antenna are included in one antenna group, as at least part of the operation of checking the maximum transmit power limit corresponding to the first RF path based on whether the accumulated SAR for the first RF path satisfies the maximum transmit power limit back off condition associated with the antenna group determined according to the state of the at least one housing Based on whether the sum of the cumulative SAR for the first RF path, the cumulative SAR for the second RF path, the SAR expected to occur for the first RF path, and the SAR expected to occur for the second RF path exceeds a threshold SAR, it may be set to determine whether to back off the maximum transmit power limit corresponding to the first RF path and/or the maximum transmit power limit corresponding to the second RF path.
- the at least one processor may be further configured to determine that the first antenna and the second antenna are included in one antenna group based on satisfying a condition indicating that the distance between the first antenna and the second antenna is less than a threshold distance in the at least one housing state.
- the at least one housing may include a first housing and a second housing
- the at least one processor may be further configured to obtain sensing data from at least one sensor for sensing a relative position between the first housing and the second housing, and to determine whether a condition indicating that a distance between the first antenna and the second antenna is less than the threshold distance is satisfied based on the sensing data.
- the at least one processor may be further configured to determine the threshold distance based on a sum of a first average SAR limit configured for the first RF path and a second average SAR limit configured for the second RF path.
- the at least one processor determines whether to back off the maximum transmit power limit corresponding to the first RF path and/or the maximum transmit power limit corresponding to the second RF path based on whether the sum of the accumulated SAR for the first RF path, the accumulated SAR for the second RF path, the SAR expected to occur for the first RF path, and the SAR expected to occur for the second RF path exceeds the threshold SAR.
- the cumulative SAR for the first RF path Based on at least a part of the cumulative SAR for the first RF path, the cumulative SAR for the second RF path, the SAR expected to occur for the first RF path, and the SAR expected to occur for the second RF path, based on exceeding the threshold SAR, it may be set to confirm that the maximum transmit power limit corresponding to the first RF path will be backed off.
- the at least one processor determines that the first antenna and the second antenna are included in each of the different antenna groups based on the change in the state of the at least one housing, and based on the fact that the first antenna and the second antenna are included in each of the different antenna groups, when the sum of the accumulated SAR for the first RF path and the SAR expected to occur for the first RF path at a time point after the change in the state of the at least one housing exceeds the threshold SAR , It is determined to back off the maximum transmit power limit corresponding to the first RF path, and when the sum of the accumulated SAR for the first RF path and the SAR expected to occur for the first RF path at a time point after the change in the state of the at least one housing is less than or equal to the threshold SAR, the maximum transmit power limit corresponding to the first RF path may be further set not to back off.
- the at least one processor determines that a second antenna corresponding to a second RF path for transmitting a second RF signal among the plurality of antennas and the first antenna are included in one antenna group as at least part of an operation of checking a maximum transmit power limit corresponding to the first RF path based on whether the accumulated SAR for the first RF path satisfies a maximum transmit power limit back off condition associated with the antenna group determined according to the state of the at least one housing.
- the first and second antennas are different antenna groups, respectively.
- the first and second antennas are different antenna groups, respectively.
- the sum of the cumulative SAR for the first RF path and the SAR expected to occur for the first RF path exceeds a threshold SAR, based on being included in the first RF path, it may be set to determine whether to back off the maximum transmit power limit.
- the at least one processor may be further configured to identify a change in the state of the at least one housing, and reset an antenna group including the first antenna based on the change in the state of the at least one housing.
- the at least one processor determines whether the accumulated SAR for the first RF path satisfies the maximum transmit power limit back off condition determined according to the antenna group and an event representing the type of body part contacting the electronic device, as at least part of an operation of checking the maximum transmit power limit back off condition corresponding to the first RF path based on whether the accumulated SAR for the first RF path satisfies the maximum transmit power limit back off condition associated with the antenna group determined according to the state of the at least one housing. Based on this, it may be set to check the maximum transmit power limit corresponding to the first RF path.
- an electronic device includes at least one housing, a plurality of antennas disposed on the at least one housing, at least one RF circuit, and at least one processor, wherein the at least one processor determines to transmit RF signals through a first RF path corresponding to a first antenna among the plurality of antennas and a second RF path corresponding to a second antenna among the plurality of antennas, and determines whether a distance between the first antenna and the second antenna is less than a threshold distance, wherein A distance between the first antenna and the second antenna varies according to a state of the at least one housing, and based on whether the sum of the first accumulated SAR corresponding to the first RF path and the second accumulated SAR corresponding to the second second RF path satisfies a maximum transmit power limit back off condition based on a distance between the first antenna and the second antenna being less than the threshold distance, a first maximum transmit power limit corresponding to the first RF path or the second maximum transmit power limit corresponding to the second RF path.
- the at least one processor determines whether the first maximum transmit power limit is decreased according to whether the first accumulated SAR corresponding to the first RF path satisfies the maximum transmit power limit back off condition based on the distance between the first antenna and the second antenna being greater than or equal to the threshold distance, and determines whether the second accumulated SAR corresponding to the second RF path satisfies the maximum transmit power limit back off condition, and determines whether the second accumulated SAR corresponding to the second RF path satisfies the maximum transmit power limit back off condition.
- an operating method of an electronic device including at least one housing, a plurality of antennas disposed on the at least one housing, and at least one RF circuit may include determining to transmit an RF signal through a first RF path corresponding to a first antenna among the plurality of antennas, checking a state of the at least one housing, and determining whether an accumulated SAR for the first RF path satisfies a maximum transmit power limit back-off condition associated with an antenna group determined according to a state of the at least one housing, Checking a maximum transmit power limit corresponding to one RF path, and controlling the at least one RF circuit to transmit the RF signal based on a transmit power set based on the maximum transmit power limit.
- a method of operating an electronic device including at least one housing, a plurality of antennas disposed on the at least one housing, and at least one RF circuit may include determining to transmit RF signals through a first RF path corresponding to a first antenna among the plurality of antennas and a second RF path corresponding to a second antenna among the plurality of antennas, determining whether a distance between the first antenna and the second antenna is less than a threshold distance, wherein the first antenna and the second antenna The distance between the two antennas varies according to the state of the at least one housing, and based on whether the sum of the first accumulated SAR corresponding to the first RF path and the second accumulated SAR corresponding to the second RF path satisfies a maximum transmit power limit back-off condition based on a distance between the first antenna and the second antenna being less than the threshold distance, a first maximum transmit power limit corresponding to the first RF path or a maximum transmit power limit corresponding to the second RF path and controlling the at least one
- Electronic devices may be devices of various types.
- the electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance.
- a portable communication device eg, a smart phone
- a computer device e.g., a smart phone
- a portable multimedia device e.g., a portable medical device
- a camera e.g., a portable medical device
- a camera e.g., a portable medical device
- a camera e.g., a portable medical device
- a camera e.g., a camera
- a wearable device e.g., a smart bracelet
- first, second, or first or secondary may be used simply to distinguish a corresponding component from other corresponding components, and do not limit the corresponding components in other respects (e.g., importance or order).
- a (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 may be connected to the other component directly (e.g., by wire), wirelessly, or through a third component.
- 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, for example, logic, logical block, component, or circuit.
- a module may be an integrally constructed component or a minimal unit of components or a portion thereof that performs one or more functions.
- the module may be implemented in the form of an application-specific integrated circuit (ASIC).
- ASIC application-specific integrated circuit
- Various embodiments of this document may be implemented as software (eg, program 140) including one or more instructions stored in a storage medium (eg, internal memory 136 or external memory 138) readable by a machine (eg, electronic device 101).
- a processor eg, the processor 120
- a device eg, the electronic device 101
- the one or more instructions may include code generated by a compiler or code executable by an interpreter.
- the device-readable storage medium may be provided in the form of a non-transitory storage medium.
- 'non-temporary' only means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic wave), and this term does not distinguish between the case where data is semi-permanently stored in the storage medium and the case where it is temporarily stored.
- a signal e.g., electromagnetic wave
- the method according to various embodiments disclosed in this document may be included and provided in a computer program product.
- Computer program products may be traded between sellers and buyers as commodities.
- a 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 distributed (e.g., downloaded or uploaded) online, through an application store (e.g., Play StoreTM) or directly between two user devices (e.g., smartphones).
- an application store e.g., Play StoreTM
- at least part of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium such as a manufacturer's server, an application store server, or a relay server's memory.
- each component (eg, module or program) of the components described above may include a single object or a plurality of entities, and some of the plurality of entities may be separately disposed in other components.
- one or more components or operations among the aforementioned corresponding components may be omitted, or one or more other components or operations may be added.
- a plurality of components eg modules or programs
- the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component of the plurality of components prior to the integration.
- the actions performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the actions may be executed in a different order, may be omitted, or one or more other actions may be added.
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Abstract
Description
| a. Normal MAX Power : SAR의 Margin 이 남은 경우의 최대 송신 파워 b. Normal Max SAR : Normal MAX Power로 동작 시 발생하는 SAR의 크기 c. Backoff MAX Power : SAR의 Margin 이 부족하여 백오프를 수행하는 경우의 최대 송신 파워 d. Backoff Max SAR : Backoff Max Power로 동작 시 발생하는 SAR의 크기 e. Measurement Time(T) : 누적 SAR의 계산, 또는 SAR의 평균을 계산하기 위한 기간 f. Measurement Period(P) : SAR를 계산하는 주기(또는, 시간 간격) g. SAR 계산을 위한 테이블의 개수 : T/P - 1 h. Average SAR LIMIT : T 동안 넘지 말아야 할 평균 SAR의 최대 값 i. Average Time(A_Time) : SAR 를 누적하여 측정한 시간 j. 누적 SAR : Average Time 동안 누적된 SAR 의 합. k. Max 누적 SAR : Average SAR LIMIT X measurement Time l. Average SAR : Average Time 동안 사용된 평균 SAR의 크기 m. Tx Room : Max 누적 SAR - 누적 SAR, 사용하고 남은 SAR n. Remain Time(R_Time) : 전체 measurement time - 현재까지 SAR를 측정한시간(A_Time) |
| [변수 설정의 예시] i. Normal MAX Power : 23dBm ii. Backoff MAX Power : 20dBm iii. Measurement Time(T) : 100초 iv. Measurement Period(P) : 0.5초 v. SAR Calculator table의 개수 : 199개 vi. Average SAR LIMIT : 1.5mW/g vii. Max 누적 SAR : 150mW/g viii. Normal Max SAR => 23dBm 일 때 SAR : 2mW/g ix. Backoff Max SAR => 20dBm 일 때 SAR : 1mW/g |
| [최대 파워가 normal max power에서부터 backoff max power로 전환되는 시점]Average time X normal max power + (100 - average time) X backoff max power <= 누적 max SAR을 만족하는 시점= Average time X 2 mW/g + (100 - average time) X 1mW/g <= 150 mW/g <=> Average time <=50 |
| SAR의 합계(SAR1+ SAR2) (W/Kg) | 최소 이격 거리(R의 최솟값) (mm) |
| 3.2 | 143 |
| 2.8 | 117 |
| 2.4 | 93 |
| 2 | 71 |
| 1.6 | 51 |
| 1.4 | 41 |
| 1.2 | 33 |
| 1.0 | 25 |
| 0.8 | 18 |
Claims (15)
- 전자 장치에 있어서,적어도 하나의 하우징;상기 적어도 하나의 하우징 상에 배치되는 복수 개의 안테나들;적어도 하나의 RF 회로; 및적어도 하나의 프로세서를 포함하고,상기 적어도 하나의 프로세서는,상기 복수 개의 안테나들 중 제 1 안테나에 대응하는 제 1 RF 경로로 RF 신호를 송신하기로 결정하고,상기 적어도 하나의 하우징의 상태를 확인하고,상기 제 1 RF 경로에 대한 누적 SAR가 상기 적어도 하나의 하우징의 상태 따라 결정되는 안테나 그룹과 연관된 최대 송신 파워 한계 백 오프 조건을 만족하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 최대 송신 파워 한계를 확인하고,상기 최대 송신 파워 한계에 기반하여 설정된 송신 파워에 기반하여 상기 RF 신호를 송신하도록 상기 적어도 하나의 RF 회로를 제어하도록 설정된 전자 장치.
- 제 1 항에 있어서,상기 적어도 하나의 프로세서는, 상기 제 1 RF 경로에 대한 누적 SAR가 상기 적어도 하나의 하우징의 상태 따라 결정되는 안테나 그룹과 연관된 최대 송신 파워 한계 백 오프 조건을 만족하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 최대 송신 파워 한계를 확인하는 동작의 적어도 일부로,상기 복수 개의 안테나들 중 제 2 RF 신호를 송신하기 위한 제 2 RF 경로에 대응하는 제 2 안테나와 상기 제 1 안테나가 상이한 안테나 그룹들 각각에 포함되는 것을 확인함에 기반하여, 상기 제 1 RF 경로에 대한 누적 SAR 및 상기 제 1 RF 경로에 대하여 발생이 예상되는 SAR의 합계가 임계 SAR를 초과하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 상기 최대 송신 파워 한계를 백 오프 할지 여부를 확인하도록 설정된 전자 장치.
- 제 2 항에 있어서,상기 적어도 하나의 프로세서는,상기 적어도 하나의 하우징 상태가, 상기 제 1 안테나 및 상기 제 2 안테나 사이의 거리가 임계 거리 이상임을 나타내는 조건을 만족함에 기반하여, 상기 제 1 안테나 및 상기 제 2 안테나가 상이한 안테나 그룹들 각각에 포함되는 것으로 확인하도록 더 설정된 전자 장치.
- 제 2 항에 있어서,상기 적어도 하나의 프로세서는, 상기 제 1 RF 경로에 대한 누적 SAR 및 상기 제 1 RF 경로에 대하여 발생이 예상되는 SAR의 합계가 임계 SAR를 초과하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 상기 최대 송신 파워 한계를 백 오프 할지 여부를 확인하는 동작의 적어도 일부로,상기 제 1 RF 경로에 대한 누적 SAR 및 상기 제 1 RF 경로에 대하여 발생이 예상되는 SAR의 합계가 상기 임계 SAR 이하임에 기반하여, 상기 제 1 RF 경로에 대응하는 상기 최대 송신 파워 한계를 백 오프 하지 않는 것으로 확인하도록 설정된 전자 장치.
- 제 4 항에 있어서,상기 적어도 하나의 프로세서는,상기 적어도 하나의 하우징의 상태의 변경에 기반하여, 상기 제 1 안테나 및 상기 제 2 안테나가 하나의 안테나 그룹에 포함되는 것을 확인하고,상기 제 1 안테나 및 상기 제 2 안테나가 하나의 안테나 그룹에 포함됨에 기반하여:상기 적어도 하나의 하우징의 상태의 변경 이후 시점에서의 상기 제 1 RF 경로에 대한 누적 SAR, 상기 제 2 RF 경로에 대한 누적 SAR, 상기 제 1 RF 경로에 대하여 발생이 예상되는 SAR, 및 상기 제 2 RF 경로에 대하여 발생이 예상되는 SAR의 합계가 상기 임계 SAR를 초과하는 경우: 상기 제 1 RF 경로에 대응하는 상기 최대 송신 파워 한계 및/또는 상기 제 2 RF 경로에 대응하는 상기 최대 송신 파워 한계를 백 오프하도록 결정하고,상기 적어도 하나의 하우징의 상태의 변경 이후 시점에서의 상기 제 1 RF 경로에 대한 누적 SAR, 상기 제 2 RF 경로에 대한 누적 SAR, 상기 제 1 RF 경로에 대하여 발생이 예상되는 SAR, 및 상기 제 2 RF 경로에 대하여 발생이 예상되는 SAR의 합계가 상기 임계 SAR 이하인 경우: 상기 제 1 RF 경로에 대응하는 상기 최대 송신 파워 한계를 백 오프 하지 않도록 더 설정된 전자 장치.
- 제 1 항에 있어서,상기 적어도 하나의 프로세서는, 상기 제 1 RF 경로에 대한 누적 SAR가 상기 적어도 하나의 하우징의 상태 따라 결정되는 안테나 그룹과 연관된 최대 송신 파워 한계 백 오프 조건을 만족하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 최대 송신 파워 한계를 확인하는 동작의 적어도 일부로,상기 복수 개의 안테나들 중 제 2 RF 신호를 송신하기 위한 제 2 RF 경로에 대응하는 제 2 안테나와 상기 제 1 안테나가 하나의 안테나 그룹에 포함되는 것을 확인함에 기반하여, 상기 제 1 RF 경로에 대한 누적 SAR, 상기 제 2 RF 경로에 대한 누적 SAR, 상기 제 1 RF 경로에 대하여 발생이 예상되는 SAR, 및 상기 제 2 RF 경로에 대하여 발생이 예상되는 SAR의 합계가 임계 SAR를 초과하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 상기 최대 송신 파워 한계 및/또는 상기 제 2 RF 경로에 대응하는 상기 최대 송신 파워 한계를 백 오프 할지 여부를 확인하도록 설정된 전자 장치.
- 제 6 항에 있어서,상기 적어도 하나의 프로세서는,상기 적어도 하나의 하우징 상태가, 상기 제 1 안테나 및 상기 제 2 안테나 사이의 거리가 임계 거리 미만임을 나타내는 조건을 만족함에 기반하여, 상기 제 1 안테나 및 상기 제 2 안테나가 하나의 안테나 그룹에 포함되는 것으로 확인하도록 더 설정된 전자 장치.
- 제 6 항에 있어서,상기 적어도 하나의 프로세서는, 상기 제 1 RF 경로에 대한 누적 SAR, 상기 제 2 RF 경로에 대한 누적 SAR, 상기 제 1 RF 경로에 대하여 발생이 예상되는 SAR, 및 상기 제 2 RF 경로에 대하여 발생이 예상되는 SAR의 합계가 상기 임계 SAR를 초과하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 상기 최대 송신 파워 한계 및/또는 상기 제 2 RF 경로에 대응하는 상기 최대 송신 파워 한계를 백 오프 할지 여부를 확인하는 동작의 적어도 일부로,상기 제 1 RF 경로에 대한 누적 SAR, 상기 제 2 RF 경로에 대한 누적 SAR, 상기 제 1 RF 경로에 대하여 발생이 예상되는 SAR, 및 상기 제 2 RF 경로에 대하여 발생이 예상되는 SAR의 합계가 상기 임계 SAR를 초과함에 기반하여, 상기 제 1 RF 경로에 대응하는 상기 최대 송신 파워 한계를 백 오프할 것으로 확인하도록 설정된 전자 장치.
- 제 1 항에 있어서,상기 적어도 하나의 프로세서는, 상기 제 1 RF 경로에 대한 누적 SAR가 상기 적어도 하나의 하우징의 상태 따라 결정되는 안테나 그룹과 연관된 최대 송신 파워 한계 백 오프 조건을 만족하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 최대 송신 파워 한계를 확인하는 동작의 적어도 일부로,상기 복수 개의 안테나들 중 제 2 RF 신호를 송신하기 위한 제 2 RF 경로에 대응하는 제 2 안테나와 상기 제 1 안테나가 하나의 안테나 그룹에 포함되는 것을, 상기 제 1 RF 경로에 대하여 설정된 제 1 평균 SAR 한계 및 상기 제 2 RF 경로에 대하여 설정된 제 2 평균 SAR 한계의 합계에 기반하여, 확인하고,상기 제 1 안테나 및 상기 제 2 안테나가 상이한 안테나 그룹들 각각에 포함되도록, 상기 제 1 평균 SAR 한계 및/또는 상기 제 2 평균 SAR 한계를 조정하고,상기 제 1 평균 SAR 한계 및/또는 상기 제 2 평균 SAR 한계의 조정에 따라 상기 제 1 안테나 및 상기 제 2 안테나가 상이한 안테나 그룹들 각각에 포함됨에 기반하여, 상기 제 1 RF 경로에 대한 누적 SAR 및 상기 제 1 RF 경로에 대하여 발생이 예상되는 SAR의 합계가 임계 SAR를 초과하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 상기 최대 송신 파워 한계를 백 오프 할지 여부를 확인하도록 설정된 전자 장치.
- 제 1 항에 있어서,상기 적어도 하나의 프로세서는,상기 적어도 하나의 하우징의 상태의 변경을 확인하고,상기 적어도 하나의 하우징의 상태의 변경에 기반하여, 상기 제 1 안테나가 포함되는 안테나 그룹을 재설정하도록 더 설정된 전자 장치.
- 제 1 항에 있어서,상기 적어도 하나의 프로세서는, 상기 제 1 RF 경로에 대한 누적 SAR가 상기 적어도 하나의 하우징의 상태 따라 결정되는 안테나 그룹과 연관된 최대 송신 파워 한계 백 오프 조건을 만족하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 최대 송신 파워 한계를 확인하는 동작의 적어도 일부로,상기 제 1 RF 경로에 대한 누적 SAR가, 상기 안테나 그룹 및 상기 전자 장치에 접촉되는 신체 부위의 타입을 나타내는 이벤트에 따라 결정되는 최대 송신 파워 한계 백 오프 조건을 만족하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 최대 송신 파워 한계를 확인하도록 설정된 전자 장치.
- 전자 장치에 있어서,적어도 하나의 하우징;상기 적어도 하나의 하우징 상에 배치되는 복수 개의 안테나들;적어도 하나의 RF 회로; 및적어도 하나의 프로세서를 포함하고,상기 적어도 하나의 프로세서는,상기 복수 개의 안테나들 중 제 1 안테나에 대응하는 제 1 RF 경로 및 상기 복수 개의 안테나들 중 제 2 안테나에 대응하는 제 2 RF 경로로 RF 신호들을 송신하도록 결정하고,상기 제 1 안테나 및 상기 제 2 안테나 사이의 거리가 임계 거리 미만인지 여부를 확인하고-상기 제 1 안테나 및 상기 제 2 안테나 사이의 거리는 상기 적어도 하나의 하우징의 상태에 따라 가변됨-,상기 제 1 안테나 및 상기 제 2 안테나 사이의 거리가 상기 임계 거리 미만임에 기반하여:상기 제 1 RF 경로에 대응하는 제 1 누적 SAR 및 상기 제 2 제 2 RF 경로에 대응하는 제 2 누적 SAR의 합계가 최대 송신 파워 한계 백 오프 조건을 만족하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 제 1 최대 송신 파워 한계 또는 상기 제 2 RF 경로에 대응하는 최대 송신 파워 한계 중 적어도 하나를 감소시킬지 여부를 확인하고,상기 제 1 최대 송신 파워 한계에 기반하여 설정된 제 1 송신 파워에 기반하여 상기 제 1 RF 신호를 송신하고, 상기 제 2 최대 송신 파워 한계에 기반하여 설정된 제 2 송신 파워에 기반하여 상기 제 2 RF 신호를 송신하도록 상기 적어도 하나의 RF 회로를 제어하도록 설정된 전자 장치.
- 제 12 항에 있어서,상기 적어도 하나의 프로세서는,상기 제 1 안테나 및 상기 제 2 안테나 사이의 거리가 상기 임계 거리 이상임에 기반하여:상기 제 1 RF 경로에 대응하는 상기 제 1 누적 SAR가 상기 최대 송신 파워 한계 백 오프 조건을 만족하는지 여부에 따라, 상기 제 1 최대 송신 파워 한계의 감소 여부를 확인하고,상기 제 2 RF 경로에 대응하는 상기 제 2 누적 SAR가 상기 최대 송신 파워 한계 백 오프 조건을 만족하는지 여부에 따라, 상기 제 2 최대 송신 파워 한계의 감소 여부를 확인하고,상기 제 1 최대 송신 파워 한계에 기반하여 설정된 제 1 송신 파워에 기반하여 상기 제 1 RF 신호를 송신하고, 상기 제 2 최대 송신 파워 한계에 기반하여 설정된 제 2 송신 파워에 기반하여 상기 제 2 RF 신호를 송신하도록 상기 적어도 하나의 RF 회로를 제어하도록 설정된 전자 장치.
- 적어도 하나의 하우징, 상기 적어도 하나의 하우징 상에 배치되는 복수 개의 안테나들 및 적어도 하나의 RF 회로를 포함하는 전자 장치의 동작 방법에 있어서,상기 복수 개의 안테나들 중 제 1 안테나에 대응하는 제 1 RF 경로로 RF 신호를 송신하기로 결정하는 동작;상기 적어도 하나의 하우징의 상태를 확인하는 동작;상기 제 1 RF 경로에 대한 누적 SAR가 상기 적어도 하나의 하우징의 상태 따라 결정되는 안테나 그룹과 연관된 최대 송신 파워 한계 백 오프 조건을 만족하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 최대 송신 파워 한계를 확인하는 동작; 및상기 최대 송신 파워 한계에 기반하여 설정된 송신 파워에 기반하여 상기 RF 신호를 송신하도록 상기 적어도 하나의 RF 회로를 제어하는 동작을 포함하는 전자 장치의 동작 방법.
- 적어도 하나의 하우징, 상기 적어도 하나의 하우징 상에 배치되는 복수 개의 안테나들 및 적어도 하나의 RF 회로를 포함하는 전자 장치의 동작 방법에 있어서,상기 복수 개의 안테나들 중 제 1 안테나에 대응하는 제 1 RF 경로 및 상기 복수 개의 안테나들 중 제 2 안테나에 대응하는 제 2 RF 경로로 RF 신호들을 송신하도록 결정하는 동작;상기 제 1 안테나 및 상기 제 2 안테나 사이의 거리가 임계 거리 미만인지 여부를 확인하는 동작-상기 제 1 안테나 및 상기 제 2 안테나 사이의 거리는 상기 적어도 하나의 하우징의 상태에 따라 가변됨-;상기 제 1 안테나 및 상기 제 2 안테나 사이의 거리가 상기 임계 거리 미만임에 기반하여:상기 제 1 RF 경로에 대응하는 제 1 누적 SAR 및 상기 제 2 제 2 RF 경로에 대응하는 제 2 누적 SAR의 합계가 최대 송신 파워 한계 백 오프 조건을 만족하는지 여부에 기반하여, 상기 제 1 RF 경로에 대응하는 제 1 최대 송신 파워 한계 또는 상기 제 2 RF 경로에 대응하는 최대 송신 파워 한계 중 적어도 하나를 감소시킬지 여부를 확인하는 동작; 및상기 제 1 최대 송신 파워 한계에 기반하여 설정된 제 1 송신 파워에 기반하여 상기 제 1 RF 신호를 송신하고, 상기 제 2 최대 송신 파워 한계에 기반하여 설정된 제 2 송신 파워에 기반하여 상기 제 2 RF 신호를 송신하도록 상기 적어도 하나의 RF 회로를 제어하는 동작을 포함하는 전자 장치의 동작 방법.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23743532.6A EP4468612A4 (en) | 2022-01-24 | 2023-01-20 | Electronic device for performing back-off on basis of sar and operating method thereof |
| CN202380018667.1A CN118591990A (zh) | 2022-01-24 | 2023-01-20 | 用于基于sar执行回退的电子装置及其操作方法 |
| US18/782,781 US20240381269A1 (en) | 2022-01-24 | 2024-07-24 | Electronic device for performing back-off on basis of sar and operating method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2022-0010269 | 2022-01-24 | ||
| KR20220010269 | 2022-01-24 | ||
| KR10-2022-0033157 | 2022-03-17 | ||
| KR1020220033157A KR20230114150A (ko) | 2022-01-24 | 2022-03-17 | Sar에 기반하여 백 오프를 수행하는 전자 장치 및 동작 방법 |
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| US18/782,781 Continuation US20240381269A1 (en) | 2022-01-24 | 2024-07-24 | Electronic device for performing back-off on basis of sar and operating method thereof |
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| WO2023140689A1 true WO2023140689A1 (ko) | 2023-07-27 |
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| CN119654810A (zh) * | 2022-08-09 | 2025-03-18 | 三星电子株式会社 | 用于改变传输天线的电子设备及其操作方法 |
Citations (5)
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|---|---|---|---|---|
| US7737897B2 (en) * | 2005-02-01 | 2010-06-15 | Panasonic Corporation | Portable wireless apparatus |
| KR20150128419A (ko) * | 2014-05-09 | 2015-11-18 | 한국전자통신연구원 | Sar 제공 방법, 및 사용자 단말 |
| US20180175944A1 (en) * | 2016-12-16 | 2018-06-21 | Magic Leap, Inc. | Determining proximity of transmitter antennas of portable devices to a human body for limiting transmitter output power to meet specific absorption rate (sar) requirements |
| US10090578B2 (en) * | 2015-08-14 | 2018-10-02 | Penumbra Brands, Llc | Radiation-redirecting external case for portable communication device |
| KR20210020462A (ko) * | 2019-08-14 | 2021-02-24 | 삼성전자주식회사 | Sar에 기반하여 송신 전력을 조정하는 전자 장치 및 그 동작 방법 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10893488B2 (en) * | 2013-06-14 | 2021-01-12 | Microsoft Technology Licensing, Llc | Radio frequency (RF) power back-off optimization for specific absorption rate (SAR) compliance |
| CN106209149B (zh) * | 2016-06-30 | 2018-10-19 | 维沃移动通信有限公司 | 一种射频电路及移动终端 |
-
2023
- 2023-01-20 EP EP23743532.6A patent/EP4468612A4/en active Pending
- 2023-01-20 WO PCT/KR2023/001026 patent/WO2023140689A1/ko not_active Ceased
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- 2024-07-24 US US18/782,781 patent/US20240381269A1/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7737897B2 (en) * | 2005-02-01 | 2010-06-15 | Panasonic Corporation | Portable wireless apparatus |
| KR20150128419A (ko) * | 2014-05-09 | 2015-11-18 | 한국전자통신연구원 | Sar 제공 방법, 및 사용자 단말 |
| US10090578B2 (en) * | 2015-08-14 | 2018-10-02 | Penumbra Brands, Llc | Radiation-redirecting external case for portable communication device |
| US20180175944A1 (en) * | 2016-12-16 | 2018-06-21 | Magic Leap, Inc. | Determining proximity of transmitter antennas of portable devices to a human body for limiting transmitter output power to meet specific absorption rate (sar) requirements |
| KR20210020462A (ko) * | 2019-08-14 | 2021-02-24 | 삼성전자주식회사 | Sar에 기반하여 송신 전력을 조정하는 전자 장치 및 그 동작 방법 |
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| EP4468612A1 (en) | 2024-11-27 |
| US20240381269A1 (en) | 2024-11-14 |
| EP4468612A4 (en) | 2025-04-30 |
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