WO2020251063A1 - Dispositif électronique de commande de puissance - Google Patents

Dispositif électronique de commande de puissance Download PDF

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Publication number
WO2020251063A1
WO2020251063A1 PCT/KR2019/006919 KR2019006919W WO2020251063A1 WO 2020251063 A1 WO2020251063 A1 WO 2020251063A1 KR 2019006919 W KR2019006919 W KR 2019006919W WO 2020251063 A1 WO2020251063 A1 WO 2020251063A1
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WO
WIPO (PCT)
Prior art keywords
bandwidth
electronic device
power
apt
transmission bandwidth
Prior art date
Application number
PCT/KR2019/006919
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English (en)
Korean (ko)
Inventor
조은빛
강영희
임경호
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to PCT/KR2019/006919 priority Critical patent/WO2020251063A1/fr
Publication of WO2020251063A1 publication Critical patent/WO2020251063A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to an electronic device that performs power control. More particularly, it relates to an electronic device that performs bandwidth-based variable power control.
  • Electronic devices can be divided into mobile/portable terminals and stationary terminals depending on whether they can be moved. Again, electronic devices can be divided into handheld terminals and vehicle mounted terminals depending on whether the user can directly carry them.
  • the functions of electronic devices are diversifying. For example, there are functions of data and voice communication, taking pictures and videos through a camera, recording voice, playing music files through a speaker system, and outputting images or videos to the display unit.
  • Some terminals add an electronic game play function or perform a multimedia player function.
  • recent mobile terminals can receive multicast signals providing visual content such as broadcasting and video or television programs.
  • Such electronic devices are diversified, they are implemented in the form of a multimedia player with complex functions such as, for example, taking photos or videos, playing music or video files, and receiving games and broadcasts. have.
  • a wireless communication system using LTE communication technology has been commercialized for electronic devices and provides various services.
  • wireless communication systems using 5G communication technology are commercialized and are expected to provide various services. Meanwhile, some of the LTE frequency bands may be allocated to provide 5G communication services.
  • the mobile terminal may be configured to provide 5G communication services in various frequency bands. Recently, attempts have been made to provide a 5G communication service using a Sub6 band below 6GHz band. However, in the future, it is expected to provide 5G communication service using millimeter wave (mmWave) band in addition to Sub6 band for faster data rate.
  • mmWave millimeter wave
  • NR is an expression showing an example of a 5G radio access technology (RAT).
  • RAT 5G radio access technology
  • a new RAT system including NR uses an OFDM transmission scheme or a similar transmission scheme.
  • the new RAT system may follow OFDM parameters different from those of LTE.
  • the new RAT system follows the numerology of the existing LTE/LTE-A as it is, but can have a larger system bandwidth (eg, 100 MHz).
  • one cell may support a plurality of neurology. That is, terminals operating in different neurology can coexist within one cell.
  • Numerology corresponds to one subcarrier spacing in the frequency domain.
  • different numerology can be defined.
  • Another object is to provide an electronic device capable of performing power control based on a transmission bandwidth.
  • Another object of the present invention is to provide an electronic device capable of selecting an envelope tracking (ET) or an average power tracking (APT) method in consideration of an operating bandwidth limitation of a power tracker.
  • ET envelope tracking
  • APT average power tracking
  • an electronic device includes: a transmission/reception unit configured to receive control information; And a control unit that performs envelope tracking (ET) when the transmission bandwidth allocated based on the control information is less than or equal to a specific bandwidth.
  • the transmission bandwidth is related to the number of resource blocks (RBs) allocated to the electronic device, and envelope tracking (ET) is performed in consideration of the actually allocated transmission bandwidth, thereby improving the accuracy of output power control.
  • RBs resource blocks
  • control information is uplink (UL) scheduling information generated by a base station to schedule the RB for each UE, and the UL scheduling information includes signaling information from the base station. Through it may be provided to the electronic device.
  • UL uplink
  • control unit identifies the number of RBs (n PRB ) from the control information, and based on the number of RBs (n PRBs ) and sub-carrier spacing (SCS) , It may be determined whether the transmission bandwidth is less than or equal to the specific bandwidth.
  • a power tracker configured to perform envelope tracking (ET) or average power tracking (APT) and supply voltage to a power amplifier may be further included.
  • the controller may transmit a first control message to the power tracker to trigger an ET operation. Accordingly, in consideration of the operating bandwidth limitation of the power tracker, an envelope tracking (ET) or an average power tracking (APT) method is selected, but the optimal power control method can be selected in consideration of the channel state and the operating characteristics of various electronic devices. have.
  • the controller may transmit a second control message to the power tracker to trigger an APT operation.
  • the power tracker comprises: a voltage booster configured to supply voltage to the power amplifier; And a driving amplifier amplifying the signal output from the control unit and providing it to the power amplifier.
  • the control unit may control to perform the ET operation by detecting a power level of the power amplifier and varying a gain of the driving amplifier to compensate for the power level difference.
  • the control unit may detect the average power level of the power amplifier during a specific time interval to cause the power tracker to perform an APT operation. Accordingly, the APT operation may be performed by varying the gain of the driving amplifier to compensate for the average power level difference.
  • control unit when the transmission bandwidth exceeds the specific bandwidth, the control unit may variably set the specific time interval to increase in proportion to the number of RBs.
  • the transmission/reception unit may receive system bandwidth information broadcast from a base station, and may receive the transmission bandwidth information from the base station.
  • the control unit determines whether the transmission bandwidth is less than or equal to the specific bandwidth, and when the transmission bandwidth is less than or equal to the specific bandwidth, the average power tracking (APT) Conversion can be performed with the envelope tracking (ET).
  • APT average power tracking
  • the controller may perform the average power tracking (APT) to detect the average power level of the power amplifier during a specific time interval.
  • APT average power tracking
  • the APT operation may be performed by varying a gain of the driving amplifier to compensate for the average power level difference.
  • control unit may set the specific bandwidth based on the ET capability of the power tracker. In addition, it is possible to determine whether to perform the ET operation by comparing the set specific bandwidth and the transmission bandwidth.
  • the controller may measure a reference signal (RS) for reporting a channel state. In addition, it may be determined whether the ET or average power tracking (APT) is performed based on the degree of change of the channel state based on the measured RS and the transmission bandwidth.
  • RS reference signal
  • APT average power tracking
  • the controller may compare the transmission bandwidth with the specific bandwidth and a second specific bandwidth while performing the APT-the second specific bandwidth is set to be narrower than the specific bandwidth.
  • the APT may be continuously performed without switching to the ET.
  • control unit is configured to estimate a change in a cell location of the electronic device, and determine whether to perform the ET or average power tracking (APT) based on the estimated change in the cell location and the transmission bandwidth.
  • APT average power tracking
  • the controller may compare the transmission bandwidth with the specific bandwidth and a second specific bandwidth while performing the APT-the second specific bandwidth is set to be narrower than the specific bandwidth.
  • the APT to the ET may be switched.
  • An electronic device includes: a transmission/reception unit configured to receive control information related to a transmission bandwidth; And a baseband processor that compares the transmission bandwidth with a specific bandwidth and controls to perform envelope tracking (ET) or average power tracking (APT), in consideration of the actually allocated transmission bandwidth.
  • ET envelope tracking
  • APT average power tracking
  • the transmission bandwidth may be associated with the number of resource blocks (RBs) allocated to the electronic device.
  • the baseband processor may control to perform the ET when the number of RBs is less than or equal to the number of threshold RBs associated with the specific bandwidth.
  • the ET may be controlled to perform the APT.
  • a power tracker configured to perform the ET or the APT and supply a voltage to a power amplifier may be further included.
  • the baseband processor may transmit a first control message to the power tracker to trigger an ET operation.
  • a second control message may be transmitted to the power tracker to trigger an APT operation.
  • an envelope tracking (ET) or an average power tracking (APT) method is selected, but the optimal power control method can be selected in consideration of the channel state and the operating characteristics of various electronic devices. have.
  • the power tracker comprises: a voltage booster configured to supply voltage to the power amplifier; And a driving amplifier that amplifies a signal output from the baseband processor and provides it to the power amplifier.
  • the baseband processor when the transmission bandwidth is less than the specific bandwidth, detects the power level of the power amplifier, and controls to perform the ET operation by varying the gain of the driving amplifier to compensate for the power level difference can do.
  • the baseband processor when the transmission bandwidth exceeds the specific bandwidth, detect the average power level of the power amplifier during a specific time interval (time interval) to cause the power tracker to perform an APT operation.
  • the APT operation may be performed by varying a gain of the driving amplifier to compensate for the average power level difference.
  • An electronic device that performs power control based on a transmission bandwidth according to the present invention has an advantage of improving output power control accuracy by performing envelope tracking (ET) in consideration of an actually allocated transmission bandwidth.
  • ET envelope tracking
  • an envelope tracking (ET) or an average power tracking (APT) method may be selected, but an optimal power control method may be selected in consideration of channel conditions and operating characteristics of various electronic devices.
  • FIGS. 1B and 1C are conceptual views of an example of an electronic device related to the present disclosure viewed from different directions.
  • FIG. 2 shows a configuration of a wireless communication unit of an electronic device capable of operating in a plurality of wireless communication systems according to the present invention.
  • FIG 3 shows an example of an uplink transmission/reception operation according to the present invention.
  • FIG. 4 is a flowchart of an ET/APT conversion method according to the present invention.
  • FIG 6 shows the relationship between the system bandwidth, that is, the channel bandwidth and the transmission bandwidth according to the present invention.
  • FIG. 7 shows a configuration of an electronic device that performs a transmission bandwidth (or RB) based control scheme according to the present invention.
  • 8A and 8B show whether the ET operates according to the bandwidth and channel/transmission bandwidth of the power tracker and the power amplifier according to the present invention.
  • FIG 9 illustrates a configuration of an electronic device that performs an ET/APT operation and conversion according to another embodiment of the present invention.
  • FIG. 10 shows a detailed configuration of an electronic device for performing ET/APT operation and switching in an electronic device having a plurality of power amplifiers according to the present invention.
  • 11A and 11B are conceptual diagrams of an ET/APT operation and switching according to a change in a cell location and/or location of an electronic device according to the present invention.
  • Electronic devices described herein include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistants (PDA), a portable multimedia player (PMP), a navigation system, and a slate PC.
  • PDA personal digital assistants
  • PMP portable multimedia player
  • slate PC slate PC
  • Tablet PC tablet PC
  • ultrabook ultrabook
  • wearable device wearable device, for example, smartwatch, glass-type terminal (smart glass), HMD (head mounted display)
  • HMD head mounted display
  • FIG. 1A is a block diagram illustrating an electronic device related to the present invention
  • FIGS. 1B and 1C are conceptual views of an example of an electronic device related to the present disclosure viewed from different directions.
  • the electronic device 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a control unit 180, and a power supply unit 190. ), etc.
  • the components shown in FIG. 1A are not essential for implementing an electronic device, and thus an electronic device described in the present specification may have more or fewer components than the components listed above.
  • the wireless communication unit 110 may be configured between the electronic device 100 and the wireless communication system, between the electronic device 100 and other electronic devices 100, or between the electronic device 100 and an external server. It may include one or more modules that enable wireless communication between. In addition, the wireless communication unit 110 may include one or more modules that connect the electronic device 100 to one or more networks.
  • the one or more networks may be, for example, a 4G communication network and a 5G communication network.
  • the wireless communication unit 110 may include at least one of a 4G wireless communication module 111, a 5G wireless communication module 112, a short-range communication module 113, and a location information module 114.
  • the 4G wireless communication module 111 may transmit and receive 4G base stations and 4G signals through a 4G mobile communication network. At this time, the 4G wireless communication module 111 may transmit one or more 4G transmission signals to the 4G base station. In addition, the 4G wireless communication module 111 may receive one or more 4G reception signals from the 4G base station.
  • an uplink (UL) multi-input multi-output (MIMO) may be performed by a plurality of 4G transmission signals transmitted to the 4G base station.
  • a downlink (DL) multi-input multiple output (MIMO) may be performed by a plurality of 4G reception signals received from a 4G base station.
  • the 5G wireless communication module 112 may transmit and receive 5G base stations and 5G signals through a 5G mobile communication network.
  • the 4G base station and the 5G base station may have a non-stand-alone (NSA) structure.
  • the 4G base station and the 5G base station may have a co-located structure disposed at the same location within a cell.
  • the 5G base station may be disposed in a separate location from the 4G base station in a stand-alone (SA) structure.
  • SA stand-alone
  • the 5G wireless communication module 112 may transmit and receive 5G base stations and 5G signals through a 5G mobile communication network. In this case, the 5G wireless communication module 112 may transmit one or more 5G transmission signals to the 5G base station. In addition, the 5G wireless communication module 112 may receive one or more 5G received signals from the 5G base station.
  • the 5G frequency band may use the same band as the 4G frequency band, and this may be referred to as LTE re-farming.
  • the 5G frequency band the Sub6 band, which is a band below 6GHz, may be used.
  • a millimeter wave (mmWave) band may be used as a 5G frequency band to perform broadband high-speed communication.
  • the electronic device 100 may perform beam forming to expand communication coverage with a base station.
  • uplink MIMO may be performed by a plurality of 5G transmission signals transmitted to the 5G base station.
  • downlink (DL) MIMO may be performed by a plurality of 5G reception signals received from the 5G base station.
  • the wireless communication unit 110 may be in a dual connectivity (DC) state with a 4G base station and a 5G base station through the 4G wireless communication module 111 and the 5G wireless communication module 112.
  • DC dual connectivity
  • the dual connection between the 4G base station and the 5G base station may be referred to as EN-DC (EUTRAN NR DC).
  • EUTRAN is an Evolved Universal Telecommunication Radio Access Network, which means 4G wireless communication system
  • NR is New Radio, which means 5G wireless communication system.
  • a 4G reception signal and a 5G reception signal may be simultaneously received through the 4G wireless communication module 111 and the 5G wireless communication module 112.
  • the short range communication module 113 is for short range communication, and includes BluetoothTM, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and NFC. Near field communication may be supported by using at least one of (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technologies.
  • the short-range communication module 114 may be configured between the electronic device 100 and a wireless communication system, between the electronic device 100 and other electronic devices 100, or between the electronic device 100 and other electronic devices 100 through wireless area networks. ) And a network in which the other electronic device 100 or an external server is located may support wireless communication.
  • the local area wireless communication network may be a wireless personal area network (Wireless Personal Area Networks).
  • short-range communication between electronic devices may be performed using the 4G wireless communication module 111 and the 5G wireless communication module 112.
  • short-range communication may be performed between electronic devices through a device-to-device (D2D) method without passing through a base station.
  • D2D device-to-device
  • carrier aggregation using at least one of the 4G wireless communication module 111 and 5G wireless communication module 112 and the Wi-Fi communication module 113 for transmission speed improvement and communication system convergence (convergence)
  • carrier aggregation using at least one of the 4G wireless communication module 111 and 5G wireless communication module 112 and the Wi-Fi communication module 113 for transmission speed improvement and communication system convergence (convergence)
  • 4G + WiFi carrier aggregation may be performed using the 4G wireless communication module 111 and the Wi-Fi communication module 113.
  • 5G + WiFi carrier aggregation may be performed using the 5G wireless communication module 112 and the Wi-Fi communication module 113.
  • the location information module 114 is a module for obtaining a location (or current location) of an electronic device, and a representative example thereof is a GPS (Global Positioning System) module or a WiFi (Wireless Fidelity) module.
  • a GPS module Global Positioning System
  • WiFi Wireless Fidelity
  • the electronic device may acquire the location of the electronic device using a signal transmitted from a GPS satellite.
  • the location of the electronic device may be obtained based on information of the Wi-Fi module and a wireless access point (AP) that transmits or receives a wireless signal.
  • AP wireless access point
  • the location information module 114 may perform any function among other modules of the wireless communication unit 110 in order to obtain data on the location of the electronic device as a substitute or additionally.
  • the location information module 114 is a module used to obtain the location (or current location) of the electronic device, and is not limited to a module that directly calculates or obtains the location of the electronic device.
  • the electronic device may acquire the location of the electronic device based on information of the 5G wireless communication module and a 5G base station transmitting or receiving a wireless signal.
  • the 5G base station in the mmWave band is deployed in a small cell having a narrow coverage, it is advantageous to obtain the location of the electronic device.
  • the input unit 120 includes a camera 121 or an image input unit for inputting an image signal, a microphone 122 for inputting an audio signal, or an audio input unit, and a user input unit 123 for receiving information from a user, for example, , A touch key, a mechanical key, etc.).
  • the voice data or image data collected by the input unit 120 may be analyzed and processed as a user's control command.
  • the sensing unit 140 may include one or more sensors for sensing at least one of information in the electronic device, information on surrounding environments surrounding the electronic device, and user information.
  • the sensing unit 140 includes a proximity sensor 141, an illumination sensor 142, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity.
  • G-sensor for example, camera (see 121)), microphone (microphone, see 122), battery gauge, environmental sensor (for example, barometer, hygrometer, thermometer, radiation detection sensor, It may include at least one of a heat sensor, a gas sensor, etc.), and a chemical sensor (eg, an electronic nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the electronic device disclosed in this specification may combine and utilize information sensed by at least two or more of these sensors.
  • the output unit 150 is for generating an output related to visual, auditory or tactile sense, and includes at least one of the display unit 151, the sound output unit 152, the hap tip module 153, and the light output unit 154 can do.
  • the display unit 151 may implement a touch screen by forming a layer structure or integrally with the touch sensor.
  • the touch screen may function as a user input unit 123 that provides an input interface between the electronic device 100 and a user, and may provide an output interface between the electronic device 100 and a user.
  • the interface unit 160 serves as a passage between various types of external devices connected to the electronic device 100.
  • the interface unit 160 connects a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, and a device equipped with an identification module. It may include at least one of a port, an audio input/output (I/O) port, an input/output (video I/O) port, and an earphone port.
  • the electronic device 100 may perform appropriate control related to the connected external device in response to the connection of the external device to the interface unit 160.
  • the memory 170 stores data supporting various functions of the electronic device 100.
  • the memory 170 may store a plurality of application programs or applications driven by the electronic device 100, data for the operation of the electronic device 100, and commands. At least some of these application programs may be downloaded from an external server through wireless communication. In addition, at least some of these application programs may exist on the electronic device 100 from the time of delivery for basic functions of the electronic device 100 (eg, incoming calls, outgoing functions, message receiving, and outgoing functions). Meanwhile, the application program may be stored in the memory 170, installed on the electronic device 100, and driven by the controller 180 to perform an operation (or function) of the electronic device.
  • the controller 180 In addition to operations related to the application program, the controller 180 generally controls overall operations of the electronic device 100.
  • the controller 180 may provide or process appropriate information or functions to a user by processing signals, data, information, etc. input or output through the above-described components or by driving an application program stored in the memory 170.
  • the controller 180 may control at least some of the components examined together with FIG. 1A. Furthermore, in order to drive the application program, the controller 180 may operate by combining at least two or more of the components included in the electronic device 100 with each other.
  • the power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power to each of the components included in the electronic device 100.
  • the power supply unit 190 includes a battery, and the battery may be a built-in battery or a replaceable battery.
  • At least some of the respective components may operate in cooperation with each other to implement an operation, control, or control method of an electronic device according to various embodiments described below.
  • the operation, control, or control method of the electronic device may be implemented on the electronic device by driving at least one application program stored in the memory 170.
  • the disclosed electronic device 100 includes a bar-shaped terminal body.
  • the present invention is not limited thereto, and may be applied to various structures such as a watch type, a clip type, a glass type, or a folder type in which two or more bodies are relatively movably coupled, a flip type, a slide type, a swing type, and a swivel type. .
  • a description of a specific type of electronic device may be generally applied to other types of electronic devices.
  • the terminal body may be understood as a concept referring to the electronic device 100 as at least one aggregate.
  • the electronic device 100 includes a case (for example, a frame, a housing, a cover, etc.) forming an exterior. As shown, the electronic device 100 may include a front case 101 and a rear case 102. Various electronic components are disposed in an inner space formed by the combination of the front case 101 and the rear case 102. At least one middle case may be additionally disposed between the front case 101 and the rear case 102.
  • a case for example, a frame, a housing, a cover, etc.
  • the electronic device 100 may include a front case 101 and a rear case 102.
  • Various electronic components are disposed in an inner space formed by the combination of the front case 101 and the rear case 102.
  • At least one middle case may be additionally disposed between the front case 101 and the rear case 102.
  • a display unit 151 is disposed on the front of the terminal body to output information. As illustrated, the window 151a of the display unit 151 may be mounted on the front case 101 to form the front surface of the terminal body together with the front case 101.
  • electronic components may be mounted on the rear case 102 as well.
  • Electronic components that can be mounted on the rear case 102 include a removable battery, an identification module, and a memory card.
  • a rear cover 103 for covering the mounted electronic component may be detachably coupled to the rear case 102. Accordingly, when the rear cover 103 is separated from the rear case 102, the electronic components mounted on the rear case 102 are exposed to the outside. Meanwhile, a part of the side surface of the rear case 102 may be implemented to operate as a radiator.
  • the rear cover 103 when the rear cover 103 is coupled to the rear case 102, a part of the side surface of the rear case 102 may be exposed. In some cases, when the rear case 102 is combined, the rear case 102 may be completely covered by the rear cover 103. Meanwhile, the rear cover 103 may be provided with an opening for exposing the camera 121b or the sound output unit 152b to the outside.
  • the electronic device 100 includes a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, a light output unit 154, and first and second sound output units.
  • Cameras 121a and 121b, first and second operation units 123a and 123b, microphone 122, interface unit 160, and the like may be provided.
  • the display unit 151 displays (outputs) information processed by the electronic device 100.
  • the display unit 151 may display execution screen information of an application program driven by the electronic device 100, or UI (User Interface) and GUI (Graphic User Interface) information according to such execution screen information. .
  • two or more display units 151 may exist depending on the implementation form of the electronic device 100.
  • a plurality of display units may be spaced apart or integrally disposed on one surface, or may be disposed on different surfaces, respectively.
  • the display unit 151 may include a touch sensor that senses a touch on the display unit 151 so as to receive a control command by a touch method. Using this, when a touch is made to the display unit 151, the touch sensor detects the touch, and the controller 180 may be configured to generate a control command corresponding to the touch based on this.
  • Content input by the touch method may be letters or numbers, or menu items that can be indicated or designated in various modes.
  • the display unit 151 may form a touch screen together with a touch sensor, and in this case, the touch screen may function as a user input unit 123 (see FIG. 1A). In some cases, the touch screen may replace at least some functions of the first manipulation unit 123a.
  • the first sound output unit 152a may be implemented as a receiver that transmits a call sound to the user's ear, and the second sound output unit 152b is a loud speaker that outputs various alarm sounds or multimedia reproduction sounds. ) Can be implemented.
  • the light output unit 154 is configured to output light for notifying when an event occurs. Examples of the event include message reception, call signal reception, missed call, alarm, schedule notification, e-mail reception, and information reception through an application.
  • the controller 180 may control the light output unit 154 to terminate the light output.
  • the first camera 121a processes an image frame of a still image or moving picture obtained by an image sensor in a photographing mode or a video call mode.
  • the processed image frame may be displayed on the display unit 151 and may be stored in the memory 170.
  • the first and second manipulation units 123a and 123b are an example of a user input unit 123 that is operated to receive a command for controlling the operation of the electronic device 100, and may also be collectively referred to as a manipulating portion. have.
  • the first and second operation units 123a and 123b may be employed in any manner as long as the user operates while receiving a tactile feeling such as touch, push, and scroll.
  • the first and second manipulation units 123a and 123b may also be employed in a manner in which the first and second manipulation units 123a and 123b are operated without a user's tactile feeling through proximity touch, hovering touch, or the like.
  • the electronic device 100 may be provided with a fingerprint recognition sensor for recognizing a user's fingerprint, and the controller 180 may use fingerprint information detected through the fingerprint recognition sensor as an authentication means.
  • the fingerprint recognition sensor may be embedded in the display unit 151 or the user input unit 123.
  • the microphone 122 is configured to receive a user's voice and other sounds.
  • the microphone 122 may be provided in a plurality of locations and configured to receive stereo sound.
  • the interface unit 160 becomes a passage through which the electronic device 100 can be connected to an external device.
  • the interface unit 160 is a connection terminal for connection with other devices (eg, earphones, external speakers), a port for short-range communication (eg, an infrared port (IrDA Port), a Bluetooth port (Bluetooth Port), a wireless LAN port, etc.], or at least one of a power supply terminal for supplying power to the electronic device 100.
  • the interface unit 160 may be implemented in the form of a socket for accommodating an external card such as a subscriber identification module (SIM) or a user identity module (UIM), or a memory card for storing information.
  • SIM subscriber identification module
  • UIM user identity module
  • a second camera 121b may be disposed on the rear surface of the terminal body.
  • the second camera 121b has a photographing direction substantially opposite to that of the first camera 121a.
  • the second camera 121b may include a plurality of lenses arranged along at least one line.
  • the plurality of lenses may be arranged in a matrix format.
  • Such a camera may be referred to as an array camera.
  • an image may be photographed in various ways using a plurality of lenses, and an image of better quality may be obtained.
  • the flash 124 may be disposed adjacent to the second camera 121b.
  • the flash 124 illuminates light toward the subject when photographing the subject with the second camera 121b.
  • a second sound output unit 152b may be additionally disposed on the terminal body.
  • the second sound output unit 152b may implement a stereo function together with the first sound output unit 152a, and may be used to implement a speakerphone mode during a call.
  • At least one antenna for wireless communication may be provided in the terminal body.
  • the antenna may be embedded in the terminal body or may be formed in a case. Meanwhile, a plurality of antennas connected to the 4G wireless communication module 111 and the 5G wireless communication module 112 may be disposed on the side of the terminal.
  • the antenna may be formed in a film type and attached to the inner surface of the rear cover 103, or a case including a conductive material may be configured to function as an antenna.
  • each of the plurality of antennas is implemented as an array antenna, a plurality of array antennas may be disposed in the electronic device.
  • mmWave millimeter wave
  • the terminal body is provided with a power supply unit 190 (refer to FIG. 1A) for supplying power to the electronic device 100.
  • the power supply unit 190 may include a battery 191 built in the terminal body or configured to be detachable from the outside of the terminal body.
  • the electronic device includes a first power amplifier 210, a second power amplifier 220, and an RFIC 250.
  • the electronic device may further include a modem 400 and an application processor 500.
  • the modem 400 and the application processor AP 500 may be physically implemented on a single chip, and may be implemented in a logically and functionally separate form.
  • the present invention is not limited thereto and may be implemented in the form of physically separated chips depending on the application.
  • the RFIC 250 and the modem 400 may be referred to as a transceiver circuit 250 and a baseband processor 400, respectively.
  • the electronic device includes a plurality of low noise amplifiers (LNAs) 410 to 440 in the receiver.
  • LNAs low noise amplifiers
  • the first power amplifier 210, the second power amplifier 220, the controller 250, and the plurality of low noise amplifiers 310 to 340 are all operable in the first communication system and the second communication system.
  • the first communication system and the second communication system may be a 4G communication system and a 5G communication system, respectively.
  • the RFIC 250 may be configured as a 4G/5G integrated type, but is not limited thereto and may be configured as a 4G/5G separate type according to an application.
  • the RFIC 250 is configured as a 4G/5G integrated type, it is advantageous in terms of synchronization between 4G/5G circuits and has an advantage that control signaling by the modem 400 can be simplified.
  • the RFIC 250 when configured as a 4G/5G separate type, it may be referred to as a 4G RFIC and a 5G RFIC, respectively.
  • the RFIC 250 when the 5G band and the 4G band have a large difference in bands, such as when the 5G band is configured as a millimeter wave band, the RFIC 250 may be configured as a 4G/5G separate type. In this way, when the RFIC 250 is configured as a 4G/5G separate type, there is an advantage that RF characteristics can be optimized for each of the 4G band and the 5G band.
  • the RFIC 250 is configured as a 4G/5G separate type, the 4G RFIC and the 5G RFIC are logically and functionally separated, and physically, it is possible to be implemented in one chip.
  • the application processor (AP) 500 is configured to control the operation of each component of the electronic device. Specifically, the application processor (AP) 500 may control the operation of each component of the electronic device through the modem 400.
  • the modem 400 may be controlled through a power management IC (PMIC) for low power operation of an electronic device. Accordingly, the modem 400 may operate the power circuit of the transmitter and the receiver through the RFIC 250 in a low power mode.
  • PMIC power management IC
  • the application processor AP 500 may control the RFIC 250 through the modem 300 as follows. For example, if the electronic device is in the idle mode, at least one of the first and second power amplifiers 110 and 120 operates in a low power mode or is turned off through the modem 300 through the RFIC. 250 can be controlled.
  • the application processor (AP) 500 may control the modem 300 to provide wireless communication capable of low power communication.
  • the application processor (AP) 500 may control the modem 400 to enable wireless communication with the lowest power. Accordingly, even though the throughput is slightly sacrificed, the application processor (AP) 500 may control the modem 400 and the RFIC 250 to perform short-range communication using only the short-range communication module 113.
  • the modem 300 may be controlled to select an optimal wireless interface.
  • the application processor (AP, 500) may control the modem 400 to receive through both the 4G base station and the 5G base station according to the remaining battery capacity and available radio resource information.
  • the application processor (AP, 500) may receive the remaining battery level information from the PMIC, and the available radio resource information from the modem 400. Accordingly, if the remaining battery capacity and available radio resources are sufficient, the application processor (AP, 500) may control the modem 400 and the RFIC 250 to receive reception through both the 4G base station and the 5G base station.
  • the transmitting unit and the receiving unit of each radio system may be integrated into one transmitting and receiving unit. Accordingly, there is an advantage in that a circuit part integrating two types of system signals can be removed from the RF front-end.
  • the front end parts can be controlled by the integrated transmission/reception unit, the front end parts can be integrated more efficiently than when the transmission/reception system is separated for each communication system.
  • the multiple transmission/reception system as shown in FIG. 2 has the advantage of enabling efficient resource allocation since it is possible to control other communication systems as needed, and thereby minimize system delay.
  • the first power amplifier 210 and the second power amplifier 220 may operate in at least one of the first and second communication systems.
  • the first and second power amplifiers 220 can operate in both the first and second communication systems.
  • one of the first and second power amplifiers 210 and 220 may operate in the 4G band and the other may operate in the millimeter wave band. have.
  • 4x4 MIMO can be implemented using four antennas as shown in FIG. 2.
  • 4x4 DL MIMO may be performed through downlink (DL).
  • the first to fourth antennas ANT1 to ANT4 may be configured to operate in both the 4G band and the 5G band.
  • the 5G band is a millimeter wave (mmWave) band
  • the first to fourth antennas ANT1 to ANT4 may be configured to operate in any one of the 4G band and the 5G band.
  • each of a plurality of separate antennas may be configured as an array antenna in the millimeter wave band.
  • 2x2 MIMO can be implemented using two antennas connected to the first power amplifier 210 and the second power amplifier 220 among the four antennas.
  • 2x2 UL MIMO (2 Tx) may be performed through uplink (UL).
  • a transmission signal may be branched in each of one or two transmission paths, and the branched transmission signal may be connected to a plurality of antennas.
  • a switch-type splitter or power divider is built into the RFIC corresponding to the RFIC 250, so that separate parts do not need to be placed outside, thereby improving component mounting performance.
  • I can. Specifically, it is possible to select the transmission unit (TX) of two different communication systems by using a single pole double throw (SPDT) type switch inside the RFIC corresponding to the control unit 250.
  • TX transmission unit
  • SPDT single pole double throw
  • an electronic device capable of operating in a plurality of wireless communication systems according to the present invention may further include a duplexer 231, a filter 232, and a switch 233.
  • the duplexer 231 is configured to separate signals in the transmission band and the reception band from each other.
  • the signal of the transmission band transmitted through the first and second power amplifiers 210 and 220 is applied to the antennas ANT1 and ANT4 through the first output port of the duplexer 231.
  • signals in the reception band received through the antennas ANT1 and ANT4 are received by the low noise amplifiers 310 and 340 through the second output port of the duplexer 231.
  • the filter 232 may be configured to pass a signal in a transmission band or a reception band and block signals in the remaining bands.
  • the filter 232 may include a transmission filter connected to the first output port of the duplexer 231 and a reception filter connected to the second output port of the duplexer 231.
  • the filter 232 may be configured to pass only the signal of the transmission band or only the signal of the reception band according to the control signal.
  • the switch 233 is configured to transmit only either a transmission signal or a reception signal.
  • the switch 233 may be configured in the form of a single pole double throw (SPDT) so as to separate a transmission signal and a reception signal in a time division multiplexing (TDD) scheme.
  • the transmission signal and the reception signal are signals of the same frequency band, and accordingly, the duplexer 231 may be implemented in the form of a circulator.
  • the switch 233 is applicable to a frequency division multiplexing (FDD) scheme.
  • the switch 233 may be configured in the form of a Double Pole Double Throw (DPDT) so as to connect or block a transmission signal and a reception signal, respectively.
  • DPDT Double Pole Double Throw
  • the switch 233 is not necessarily required.
  • the electronic device may further include a modem 400 corresponding to a control unit.
  • the RFIC 250 and the modem 400 may be referred to as a first control unit (or a first processor) and a second control unit (a second processor), respectively.
  • the RFIC 250 and the modem 400 may be implemented as physically separate circuits.
  • the RFIC 250 and the modem 400 may be physically divided into one circuit logically or functionally.
  • the modem 400 may perform control and signal processing for transmission and reception of signals through different communication systems through the RFIC 250.
  • the modem 400 may be obtained through control information received from a 4G base station and/or a 5G base station.
  • the control information may be received through a physical downlink control channel (PDCCH), but is not limited thereto.
  • PDCCH physical downlink control channel
  • the modem 400 may control the RFIC 250 to transmit and/or receive signals through the first communication system and/or the second communication system at a specific time and frequency resource. Accordingly, the RFIC 250 may control transmission circuits including the first and second power amplifiers 210 and 220 to transmit a 4G signal or a 5G signal in a specific time period. Further, the RFIC 250 may control receiving circuits including the first to fourth low noise amplifiers 310 to 340 to receive a 4G signal or a 5G signal in a specific time period.
  • an envelope track (ET) may not be performed due to a limitation of an operating bandwidth of a power tracker.
  • an average power track (APT) method other than an ET method may be used. That is, an APT method for compensating for a change in the output power level of the power amplifier in a specific time interval unit may be used.
  • the system bandwidth (eg, 100 MHz) of the 5G communication system does not always have to be allotted, and this is an implementation issue of the base station.
  • the system bandwidth (eg, 100 MHz) is allocated, only a portion of the bandwidth is allocated to one electronic device, that is, a user equipment (UE). Therefore, even if only some of the system bandwidths are actually allocated to one electronic device, it is not necessary to use the APT method without using the ET method.
  • a bandwidth actually allocated to one electronic device may be determined based on the neurology of the 5G NR system.
  • an Orthogonal Frequency Division Multiplexing (OFDM) neurology and frame structure that can be considered in an NR system will be described.
  • a number of OFDM neurology supported in the NR system may be defined as shown in Table 1.
  • ⁇ ⁇ f 2 ⁇ * 15 [kHz] Cyclic prefix (CP) 0 15 Normal One 30 Normal 2 60 Normal, Extended 3 120 Normal 4 240 Normal
  • NR supports multiple numerology (or subcarrier spacing (SCS)) to support various 5G services. For example, when the SCS is 15 kHz, it supports a wide area in a traditional cellular band. In addition, when the SCS is 30kHz/60kHz, dense-urban, lower latency, and wider carrier bandwidth are supported. In addition, when the SCS is 60 kHz or higher, a larger bandwidth is supported to overcome phase noise.
  • SCS subcarrier spacing
  • the ET/APT switching method proposed in the present invention may be determined based on the actual transmission bandwidth of the electronic device (terminal), not the system bandwidth.
  • the base station performs uplink (UL) scheduling, and the electronic device receives control information for UL scheduling. Accordingly, the electronic device may transmit UL data to the base station according to UL scheduling of the received control information.
  • FIG. 3 shows an example of an uplink transmission/reception operation according to the present invention.
  • the base station schedules uplink transmission such as a frequency/time resource, a transport layer, an uplink precoder, and MCS (S101).
  • the base station may determine a beam for PUSCH transmission by the terminal through the beam management operations described above.
  • DCI format 0_0 or 0_1 may be used for uplink scheduling, and in particular, DCI format 0_1 includes the following information: DCI format identifier (Identifier for DCI formats), UL/SUL (Supplementary uplink) indicator (UL/ SUL indicator), bandwidth part indicator, frequency domain resource assignment, time domain resource assignment, frequency hopping flag, modulation and coding scheme (MCS) : Modulation and coding scheme), SRS resource indicator (SRI), precoding information and number of layers, antenna port(s) (Antenna port(s)), SRS request (SRS request), DMRS sequence initialization, UL-SCH (Uplink Shared Channel) indicator (UL-SCH indicator)
  • DCI format 0_0 or 0_1 includes the following information: DCI format identifier (Identifier for DCI formats), UL/SUL (Supplementary uplink) indicator (UL/ SUL indicator), bandwidth part indicator, frequency domain resource assignment, time domain resource assignment, frequency hopping flag, modulation and coding
  • SRS resources set in the SRS resource set associated with the upper layer parameter'usage' may be indicated by the SRS resource indicator field.
  • SRS resource indicator field may indicate SRS resource indicator field.
  • patialRelationInfo' can be set for each SRS resource, and its value can be one of ⁇ CRI, SSB, SRI ⁇ .
  • the terminal transmits uplink data to the base station on the PUSCH (S103).
  • the UE detects a PDCCH including DCI format 0_0 or 0_1, it transmits a corresponding PUSCH according to an indication by the corresponding DCI.
  • PUSCH transmission two transmission schemes corresponding to codebook-based transmission and non-codebook-based transmission are supported.
  • FIG. 4 shows a flowchart of a method for converting ET/APT according to the present invention.
  • the ET/APT switching method includes an uplink (UL) RB scheduling process (S100) performed by a base station and processes performed by an electronic device. Specifically, the electronic device performs a control information reception process (S210), a transmission bandwidth determination process (S220), a transmission bandwidth comparison process (S230), and an ET/APT operation process (S240).
  • S210 control information reception process
  • S220 transmission bandwidth determination process
  • S230 transmission bandwidth comparison process
  • S240 ET/APT operation process
  • the base station performs uplink (UL) resource block (RB) scheduling in consideration of an available resource for data transmission and a cell environment.
  • the electronic device receives control information including RB scheduling information through the control information receiving process (S210).
  • the control information may be received through network signaling information.
  • the electronic device may identify information on the allocated RBs (eg, the number of RBs, RB frequency bands, etc.) through the control information received in the control information reception process S210.
  • the transmission bandwidth actually allocated to the electronic device may be determined through the transmission bandwidth determination process S220.
  • the transmission bandwidth (TX BW) may be determined based on the sub-carrier spacing (SCS) and the number of RBs (n PRB ). Specifically, the product of the sub-carrier spacing (SCS), the number of subcarriers in the RB, and the number of RBs (n PRB ) may be determined as the transmission bandwidth (TX BW).
  • the transmission bandwidth comparison process (S230) it is determined whether the transmission bandwidth (TX BW) is less than or equal to a specific bandwidth (eg, 60 MHz). Accordingly, if the transmission bandwidth (TX BW) is less than or equal to a specific bandwidth, triggering is performed to perform the ET operation in the ET/APT operation process (S240). On the other hand, when the transmission bandwidth (TX BW) exceeds a specific bandwidth, it is triggered to perform the APT operation in the ET/APT operation process (S240).
  • a specific bandwidth eg, 60 MHz
  • a specific bandwidth which is a threshold for performing an ET/APT operation, is not limited to a fixed value (eg, 60 MHz), but may be changed or varied according to an application.
  • FIG. 5 is a comparison between a system bandwidth-based control method and a transmission bandwidth control method.
  • the system bandwidth that is, the channel bandwidth (Channel BW) is less than or equal to a specific bandwidth (eg, 60 MHz)
  • a specific bandwidth eg, 60 MHz
  • the APT operation can be performed.
  • the ET operation is possible according to the actual transmission bandwidth (Transmission BW) allocated to the electronic device, the APT operation is uniformly performed according to the system bandwidth. Accordingly, there is a problem in that the electronic device performs the APT operation even though the electronic device can perform the ET operation.
  • the system bandwidth that is, the channel bandwidth (Channel BW) is less than or equal to a specific bandwidth (eg, 60 MHz)
  • a specific bandwidth eg, 60 MHz
  • the ET operation is controlled to be performed. Accordingly, if the electronic device is capable of performing the ET operation, there is an advantage in that the power amplifier output level can be accurately compensated in real time by performing the ET operation.
  • Table 2 shows the relationship between the maximum transmission bandwidth consisting of the number of RBs (n PRB ) and the subcarrier spacing (SCS) according to the present invention.
  • the subcarrier spacing SCS when the subcarrier spacing SCS is 15 kHz, the transmission bandwidth is always 60 MHz or less, so that the ET operation can always be performed.
  • an ET operation may be performed if the number of RBs (n PRBs ) is 162 or less.
  • the ET operation when the subcarrier spacing SCS is 60 kHz, the ET operation may be performed if the number of RBs (n PRBs ) is 79 or less.
  • the number of RBs (n PRB ) required to perform the ET operation according to the subcarrier spacing SCS is not limited thereto, and can be variously changed according to the number of subcarriers in the RB, guard band, and neurology .
  • FIG. 6 shows the relationship between the system bandwidth, that is, the channel bandwidth and the transmission bandwidth according to the present invention.
  • a transmission bandwidth 610 within the total channel bandwidth 600 may be allocated to one electronic device.
  • the transmission bandwidth 610 may be determined based on the number of a plurality of RBs (n PRB ), and a band corresponding to the transmission bandwidth 610 may be referred to as "active resource blocks.”
  • the total channel bandwidth 6000 is composed of a transmission bandwidth configuration 620 that can be allocated to a plurality of electronic devices including a transmission bandwidth 610 allocated to one electronic device. 6000 further includes a transmission bandwidth configuration 620 and a guard band 630 between the channel edges.
  • the ET/APT control method of FIG. 5(a) may be referred to as a channel bandwidth-based control method or a system bandwidth-based control method.
  • the ET/APT control scheme of FIG. 5(b) may be referred to as a transmission bandwidth-based control scheme. Therefore, referring to FIGS. 5(b) and 6, the ET/APT control method according to the present invention is performed in a transmission bandwidth (or RB)-based control method rather than a channel bandwidth-based control method.
  • FIG. 7 shows a configuration of an electronic device that performs a transmission bandwidth (or RB) based control scheme according to the present invention.
  • the electronic device includes a power supply unit 1100, a power amplifier (PA, 1210), a transceiver unit 1250, a control unit (or baseband processor, modem) 1400, and a power tracker 1500. Include.
  • the PA VCC according to the frequency bandwidth is limited according to the VCC bandwidth supported by the power tracker 1500.
  • the PA VCC bandwidth that can be supported by the power tracker 1500 may be set to a specific bandwidth, which may be set to 60 MHz, but is not limited thereto.
  • the currently supported PA VCC bandwidth is 60 MHz
  • the maximum bandwidth of the LTE UL frequency band is 60 MHz. Therefore, during the ET operation according to the LTE UL TX transmission, there is no limit according to the VCC bandwidth of the power tracker 1500.
  • the 5G (FR1) maximum bandwidth is 100 MHz, and there is a problem that ET operation cannot be supported in the full bandwidth.
  • the present invention provides a method of performing ET/APT operation and switching based on a transmission bandwidth allocated to an actual electronic device rather than a 5G (FR1) maximum bandwidth.
  • the transmission/reception unit 1250 is configured to receive control information.
  • the transmission/reception unit 1250 may be interpreted as including a power amplifier 1210 and an antenna in front of the transceiver in addition to a transceiver in front of the control unit 1400.
  • control unit 1400 is configured to perform envelope tracking (ET) when the allocated transmission bandwidth based on the control information is less than or equal to a specific bandwidth.
  • the transmission bandwidth is associated with the number of resource blocks (RBs) allocated to one electronic device as described above.
  • the control information is uplink (UL) scheduling information generated by a base station in order to schedule the RB for each UE.
  • the uplink (UL) scheduling information may be uplink scheduling information generated in step S101 by the base station, referring to FIG. 3.
  • the UL scheduling information may be provided from the base station to the electronic device through signaling information.
  • control unit 1400 may identify the number of RBs (n PRBs ) from the control information, and accordingly, compare the transmission bandwidth with a specific bandwidth. Specifically, the control unit 1400 may determine whether the transmission bandwidth is less than or equal to the specific bandwidth based on the number of RBs (nPRB) and sub-carrier spacing (SCS).
  • n PRB number of RBs
  • SCS sub-carrier spacing
  • the power tracker 1500 is configured to perform envelope tracking (ET) or average power tracking (APT) and supply voltage to a power amplifier.
  • the controller 1400 may transmit a first control message to the power tracker 1500 to trigger an ET operation.
  • the control unit 1400 may transmit a second control message to the power tracker so that the power tracker 1500 triggers an APT operation.
  • the power tracker 1500 includes a voltage booster 1510 and a driving amplifier 1520.
  • the driving amplifier 1520 may be a Class AB amplifier, but is not limited thereto.
  • Voltage booster 1510 is configured to supply voltage to power amplifier 1210.
  • the voltage booster 1510 may increase (boost) a voltage value to supply a voltage to the power amplifier 1210.
  • the power supply unit 1100 is configured to supply power to a transistor connected to a driver of the voltage booster 1510.
  • the power supply unit 1100 may vary the voltage supplied to the transistor based on the ET or APT operation.
  • the transistor of the voltage booster 1510 may vary and provide the driving voltage Vcc to the power amplifier 1210 based on an ET or APT operation.
  • the driving amplifier 1520 is configured to amplify a signal output from the control unit 1400 and provide it to the power amplifier.
  • the signal output from the control unit 1400 may be a digital-analog converted (DAC) signal.
  • DAC digital-analog converted
  • the DAC signal is an ET DAC signal.
  • the controller 1400 may control an ET or APT operation of the voltage booster 1510 based on a transmission bandwidth, that is, RB.
  • a transmission bandwidth that is, RB.
  • the present invention supports TX bandwidth based ET/APT switching.
  • the control logic can be extended to the actual RB allocation bandwidth associated with the transmission bandwidth. That is, whether or not the ET operation of 60MHz is restricted can be determined by comparing the transmission bandwidth (RB-based) rather than the system bandwidth (channel bandwidth). Meanwhile, a band in which RB is not allocated is the same as that there is no TX transmission from the electronic device to the base station. Therefore, there is no issue in the actual power control operation of the electronic device even if the ET/APT operation and whether to switch is determined based on the actual RB allocated bandwidth.
  • control unit 1400 may control the driving amplifier 1520 in different ways according to the ET/APT operation.
  • the controller 1400 may detect the power level of the power amplifier 1210 for ET operation. At this time, the power level of the power amplifier 1210 feeds back a signal output through the power amplifier 1210 through a coupler, and the control unit 1400 provides an instantaneous output power value based on the feedback signal. Can be estimated.
  • the controller 1400 may control the ET operation to be performed by varying the gain of the driving amplifier 1520 to compensate for the power level difference.
  • the control unit 1400 may detect the average power level of the power amplifier 1210 during a specific time interval so that the power tracker 1500 performs an APT operation. . Accordingly, the controller 1400 may control to perform the APT operation by varying the gain of the driving amplifier 1520 to compensate for the difference in the average power level.
  • a specific time interval may be determined as a multiple thereof based on a minimum symbol unit.
  • the controller 1400 may variably set a specific time period to increase in proportion to the number of RBs. For example, in the APT operation, a specific time period for detecting the average power level may be set to increase proportionally as the number of RBs increases. This is because when the bandwidth characteristic of the power tracker 1500 exceeds a specific bandwidth, for example, 60 MHz, the characteristic rapidly deteriorates. Therefore, even when performing the ATP operation, it is desirable to alleviate the burden on the power tracker 1500 by increasing a specific time period in proportion to a level in which the transmission bandwidth according to the number of RBs exceeds the specific bandwidth.
  • Transmission bandwidth information for performing the ET/APT control method according to the present invention may be received through the transceiver 1250 as follows. Specifically, the transmission/reception unit 1250 receives system bandwidth information broadcast from a base station, that is, channel bandwidth information.
  • the system bandwidth that is, the channel bandwidth is not always limited to 100 MHz and may be different according to a communication method provided through the base station.
  • the system bandwidth that is, the channel bandwidth may be different. have.
  • the transceiver 1250 may receive transmission bandwidth information from the base station.
  • the transmission bandwidth information is information on a bandwidth and a frequency band allocated for each terminal within the system bandwidth. Accordingly, when the system bandwidth is greater than or equal to the specific bandwidth, the control unit 1400 may determine whether the transmission bandwidth is less than or equal to the specific bandwidth. Accordingly, when the transmission bandwidth is less than or equal to a specific bandwidth, the control unit 1400 may perform conversion from average power tracking (APT) to envelope tracking (ET).
  • API average power tracking
  • ET envelope tracking
  • the controller 1400 may perform average power tracking (APT) to detect the average power level of the power amplifier 1510 during a specific time interval.
  • APT average power tracking
  • the controller 1400 may perform the APT operation by varying the gain of the driving amplifier 1520 to compensate for the difference in the average power level.
  • the transition from ET to APT is related to the bandwidth performance of a specific component of an electronic device. Specifically, it is necessary to switch from ET to APT according to the bandwidth performance of the power amplifier 1210 and the power tracker 1500.
  • FIGS. 8A and 8B show whether or not ET operates according to the bandwidth and channel/transmission bandwidth of the power tracker and the power amplifier according to the present invention.
  • the ET operation is possible.
  • the transmission bandwidth (TX BW) is 100 MHz and the transmission bandwidth (TX BW) is 30 MHz
  • ET operation is possible.
  • the transmission bandwidth (TX BW) is 30 MHz
  • ET bandwidth (ET-BW) of the power tracker 1500 is 60 MHz
  • ET operation bandwidth (PA-BW) of the power amplifier 1210 is 100 MHz and the transmission bandwidth (TX BW) is 30 MHz
  • the power amplifier 1210 may support ET operation.
  • the controller 140 may set a specific bandwidth based on the ET capability of the power tracker 1500. For example, if the ET capability of the power tracker 1500, that is, the ET bandwidth (ET-BW, 720) is 60 MHz, a specific bandwidth, which is an ET operation threshold bandwidth, may be set to 60 MHz. To this end, the controller 140 may set a specific bandwidth by identifying operation bandwidth information (or type information, version information including the same) of the power tracker 1500.
  • control unit 140 may identify operation bandwidth information of the power tracker 1500 and set a specific bandwidth to 30 MHz, 40 MHz, 50 MHz, or 60 MHz. Accordingly, the controller 140 may determine whether to perform an ET operation or whether to switch ET/APT by comparing the set specific bandwidth and the transmission bandwidth.
  • the ET operation cannot be supported.
  • the channel bandwidth (CH-BW) is 100 MHz and the transmission bandwidth (TX BW2) is 100 MHz
  • the transmission bandwidth exceeds a specific bandwidth, for example, 60 MHz
  • ET operation cannot be supported.
  • the transmission bandwidth (TX BW2) is 100 MHz and the ET bandwidth (ET-BW2) of the power tracker 1500 is 60 MHz
  • ET operation cannot be supported.
  • the power amplifier 1210 may support ET operation.
  • the ET bandwidth (ET-BW2) of the power tracker 1500 is 60 MHz, since ET operation cannot be supported, the channel bandwidth (CH-BW) of 100 MHz is the ET bandwidth (ET-BW2) of the power tracker 1500 If exceeded, ET operation cannot be supported.
  • the reason why 100MHz ET is impossible is due to the limit of the operating bandwidth of the power tracker 1500 compared to the transmission bandwidth.
  • the transmission bandwidth actually allocated to one electronic device will exceed 60MHz. Accordingly, when the power tracker 1500 performs ET switching based on the transmission bandwidth, there is no issue in real-time control of RF output power by the power amplifier 1210 or the like and ET operation.
  • FIG. 9 shows a configuration of an electronic device that performs an ET/APT operation and conversion according to another embodiment of the present invention.
  • the electronic device includes a power supply unit 1100, a power amplifier module 1200, a transceiver unit 1250, a control unit (or baseband processor, modem) 1400, and a power tracker 1500.
  • the power amplifier module (PA module 1200) includes a power amplifier 1210 and a driving amplifier 1215.
  • the control unit 1400 provides a control signal for the ET DAC to the driving amplifier 1215.
  • the variable driving voltage Vcc provided from the power tracker 1500 is provided to the power amplifier 1210.
  • the power amplifier 1210 has the advantage of compensating for a change in output power over time according to the variable driving voltage Vcc provided from the power tracker 1500.
  • the driving amplifier 1215 may be configured to amplify the transmission signal based on the control signal for the ET DAC. Accordingly, there is an advantage in that the operating bandwidth of the driving voltage Vcc provided to the power amplifier 1210 by the driving amplifier 1215 built in the power amplifier module 1210 can be further secured.
  • the electronic device according to the present invention can operate in a plurality of communication systems.
  • the electronic device performing the ET/APT operation and conversion according to the present invention can operate in the first communication system and the second communication system.
  • the first communication system and the second communication system may be a 4G (LTE) communication system and a 5G communication system, but are not limited thereto and may be changed according to an application.
  • LTE Long Term Evolution
  • 5G 5G
  • the electronic device performing the ET/APT operation and conversion according to the present invention may include a plurality of power amplifiers 210 and 220 as shown in FIG. 2, and FIG. 7 and/or a plurality of power amplifiers 210 and 220 are also provided.
  • the ET/APT control method according to FIG. 9 may be applied.
  • each power amplifier 210, 220 may be separately provided with a power tracker to perform individual power control.
  • common power control may be performed through one power tracker 1500.
  • time synchronization between each data transmission is possible in 5G UL MIMO by one power tracker 1500.
  • FIG. 10 shows a detailed configuration of an electronic device for performing an ET/APT operation and switching in an electronic device having a plurality of power amplifiers according to the present invention.
  • the electronic device includes a power supply unit 1100, a power amplifier (PA 1210a, 1210b), a transmission/reception unit 1250, a control unit (or baseband processor, modem) 1400, and a power tracker 1500.
  • the power tracker 1500 includes a voltage booster 1510 and first and second driving amplifiers 1520a and 1520b.
  • driving amplifiers 1520a and 1520b are separately provided for each of the power amplifiers 1210 and 1220 to perform individual power control, but a common voltage may be provided through one voltage booster 1510.
  • a common voltage may be provided through one voltage booster 1510.
  • the ET/ATP control method through the first and second driving amplifiers 1520a and 1520b and one voltage booster 1510 can be applied to a plurality of power amplifiers of a 5G communication system.
  • the ET/ATP control method through the first and second driving amplifiers 1520a and 1520b and one voltage booster 1510 is similar to the first power amplifier of the 4G communication system and the second power amplifier of the 5G communication system. It is also applicable between different communication systems. Accordingly, there is an advantage in that time synchronization between a plurality of communication systems and individual power control for each channel are possible.
  • the RB transmission bandwidth-based ET/APT power control method according to the present invention may be performed based on a channel state and/or a location in a cell of a terminal as follows.
  • the controller 1400 may measure a reference signal (RS) for reporting a channel state.
  • the reference signal RS includes a common reference signal (CRS) that is a cell common reference signal and/or a channel state information reference signal (CSI-RS) that is a reference signal for each UE.
  • CRS common reference signal
  • CSI-RS channel state information reference signal
  • the present invention is not limited thereto, and an arbitrary cell common reference signal and a reference signal for each UE may correspond to this.
  • the controller 1400 may use a cell common reference signal such as a CRS. Accordingly, the control unit 1400 may determine whether to perform ET or APT based on the degree of change of the channel state based on the cell common reference signal and the transmission bandwidth. On the other hand, when the degree of change in the channel state is different for each terminal and the terminal in the cell is determined to be a different channel state, the controller 1400 may use a reference signal for each UE such as CSI-RS.
  • control unit 1400 uses a cell common reference signal such as CRS at regular time intervals, and selectively transmits a reference signal for each UE such as CSI-RS when the degree of channel state change is different for each terminal or the degree of channel state change is large. Can be used.
  • the controller 1400 may determine whether to perform the ET or average power tracking (APT) based on the degree of change in the channel state and the transmission bandwidth based on the measured RS. Specifically, when the channel state change is large, the controller 1400 may perform an ET operation if the transmission bandwidth is less than or equal to a specific bandwidth.
  • ET average power tracking
  • the controller 1400 may continue to perform the APT operation if the APT operation is previously being performed. However, if it is determined that the channel state change is greater than or equal to the threshold, the APT operation may be stopped and the ET operation may be performed.
  • the channel state change may be determined according to the degree of change of the CRS and the CSI-RS or the degree of change of the SINR, as described above.
  • the controller 1400 may compare a transmission bandwidth with a specific bandwidth and a second specific bandwidth while performing APT.
  • the second specific bandwidth as the second threshold may be set to be narrower than the specific bandwidth as the threshold.
  • the specific bandwidth may be set to 60 MHz, and when the channel state change is small, the second specific bandwidth may be set to 30, 40, 50 MHz, etc. according to the channel state change. Accordingly, if the transmission bandwidth is less than or equal to a specific bandwidth, but is greater than or equal to the second specific bandwidth, and the change in the channel state is less than or equal to the threshold, the control unit 1400 can control to continuously perform power control based on APT without switching to ET. have.
  • FIGS. 11A and 11B illustrate conceptual diagrams of an ET/APT operation and switching according to a change in a cell location and/or location of an electronic device according to the present invention.
  • the control unit 1400 may estimate an intra-cell location of the electronic device and/or a change in the intra-cell location. Accordingly, the controller 1400 may determine whether to perform ET or average power tracking (APT) based on the estimated intra-cell location and/or the location change and the transmission bandwidth.
  • APT average power tracking
  • the controller 1400 may determine whether to perform ET or average power tracking (APT) based on the estimated intra-cell location change and transmission bandwidth. . Specifically, the controller 1400 may compare a transmission bandwidth with a specific bandwidth and a second specific bandwidth while performing APT. In this case, the second specific bandwidth may be set to be narrower than the specific bandwidth as described above.
  • ET or average power tracking APT
  • the controller 1400 may switch from APT to ET if the transmission bandwidth is less than or equal to the second specific bandwidth.
  • the output power to the base station in the cell must be increased. Therefore, in the case of an electronic device moving to a cell boundary, it is important to perform accurate power control through the ET method.
  • the cell radius R2, which is a threshold value should be set smaller than the aforementioned cell radius R1 in consideration of a moving speed at which the electronic device moves from the cell center toward the cell boundary.
  • the electronic device includes a transceiver 1250, a baseband processor 1400, and a power tracker 1500.
  • the electronic device includes a transceiver 1250, a baseband processor 1400, and a power tracker 1500.
  • the contents described above with respect to the ET/APT operation according to the present invention can be applied.
  • the transceiver 1250 is configured to receive control information related to a transmission bandwidth. Meanwhile, the baseband processor (modem) 1400 compares the transmission bandwidth with a specific bandwidth and controls to perform envelope tracking (ET) or average power tracking (APT).
  • ET envelope tracking
  • APT average power tracking
  • the transmission bandwidth is associated with the number of resource blocks (RBs) allocated to the electronic device, and increases in proportion to this. Accordingly, the baseband processor 1400 controls to perform ET when the number of RBs is less than or equal to the threshold number of RBs associated with the specific bandwidth. On the other hand, when the number of RBs exceeds the threshold number of RBs, the baseband processor 1400 may control to perform APT by switching from the ET to APT.
  • RBs resource blocks
  • a power tracker 1500 is configured to perform the ET or the APT and supply a voltage to a power amplifier. Accordingly, if the transmission bandwidth is less than or equal to the specific bandwidth, the baseband processor 1400 may transmit a first control message to the power tracker 1500 to trigger an ET operation. On the other hand, when the transmission bandwidth exceeds the specific bandwidth, the second control message may be transmitted to the power tracker 1500 to trigger the APT operation.
  • the power tracker 1500 amplifies a signal output from the voltage booster 1510 and the baseband processor 1400 configured to supply a voltage to the power amplifier 1210 and provides the amplified signal to the power amplifier 1210 ( 1520).
  • the baseband processor 1400 may detect the power level of the power amplifier when the transmission bandwidth is less than or equal to the specific bandwidth. Accordingly, the ET operation may be performed by varying the gain of the driving amplifier 1520 to compensate for the power level difference.
  • the baseband processor 1400 may detect the average power level of the power amplifier during a specific time interval to cause the power tracker to perform an APT operation. have. Accordingly, the APT operation can be performed by varying the gain of the driving amplifier to compensate for the average power level difference.
  • An electronic device that performs power control based on a transmission bandwidth according to the present invention has an advantage of improving output power control accuracy by performing envelope tracking (ET) in consideration of an actually allocated transmission bandwidth.
  • ET envelope tracking
  • an envelope tracking (ET) or an average power tracking (APT) method may be selected, but an optimal power control method may be selected in consideration of channel conditions and operating characteristics of various electronic devices.
  • designing and driving of a transmitting unit including a power amplifier and a transceiver, a receiving unit including a low-noise amplifier, and an RFIC can be implemented as computer-readable codes on a medium on which a program is recorded.
  • the computer-readable medium includes all types of recording devices storing data that can be read by a computer system. Examples of computer-readable media include HDD (Hard Disk Drive), SSD (Solid State Disk), SDD (Silicon Disk Drive), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. There is also a carrier wave (eg, transmission over the Internet).
  • the computer may include the control unit 180 of the terminal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un dispositif électronique comprenant : un émetteur-récepteur conçu pour recevoir des informations de commande ; et une unité de commande destinée à effectuer un suivi d'enveloppe (ET) lorsqu'une largeur de bande d'émission attribuée sur la base des informations de commande est inférieure ou égale à une largeur de bande spécifique. La largeur de bande d'émission est associée au nombre de blocs de ressources (RB) attribués au dispositif électronique, et l'ET est réalisé en tenant compte d'une largeur de bande d'émission réellement attribuée, ce qui permet d'améliorer la précision de commande de puissance de sortie.
PCT/KR2019/006919 2019-06-10 2019-06-10 Dispositif électronique de commande de puissance WO2020251063A1 (fr)

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