WO2022131766A1

WO2022131766A1 - Electronic device and method for transmitting reference signal in electronic device

Info

Publication number: WO2022131766A1
Application number: PCT/KR2021/019002
Authority: WO
Inventors: 김진우; 김준석; 김태윤; 양민호; 우준영; 이상근; 이주현; 이형주; 한용규; 임채만
Original assignee: 삼성전자 주식회사
Priority date: 2020-12-16
Filing date: 2021-12-14
Publication date: 2022-06-23
Also published as: KR20220086260A

Abstract

According to various embodiments, an electronic device may comprise a communication processor, an RFIC, an RFFE circuit, and a plurality of antennas, wherein the communication processor transmits a reference signal at configured power on the basis of a path loss configuration value with respect to a transmission path corresponding to each of the plurality of antennas, when target power of the reference signal is larger than the maximum transmission power configured with respect to the reference signal, identifies a difference between the target power of the reference signal and the configured maximum transmission power, and when the difference between the target power of the reference signal and the configured maximum transmission power is equal to or smaller than a configured threshold value, controls to adjust the path loss configuration value with respect to the transmission path corresponding to at least one of the plurality of antennas. Various other embodiments are possible.

Description

Electronic Devices and Methods for Transmitting Reference Signals in Electronic Devices

Various embodiments of the present disclosure relate to an electronic device and a method for transmitting a reference signal in the electronic device.

As the use of mobile terminals providing various functions has become common due to the development of mobile communication technology, efforts are being made to develop a 5G communication system to meet the increasing demand for wireless data traffic. In addition to the frequency band used in the 3G communication system and the LTE (long term evolution) communication system, the 5G communication system has a higher frequency band (eg, For example, implementation in the 25-60 GHz band) is being considered.

For example, in order to mitigate the path loss of radio waves and increase the propagation distance of radio waves in the mmWave band, in the 5G communication system, beamforming, massive MIMO, full dimensional MIMO; FD-MIMO), array antenna, analog beam-forming, and large scale antenna technologies are being discussed.

As a method of implementing 5G communication, a stand alone (SA) method and a non-stand alone (NSA) method are being considered. Among them, the SA method may be a method using only a new radio (NR) system, and the NSA method may be a method using an NR system together with an existing LTE system. In the NSA scheme, the user terminal may use the gNB of the NR system as well as the eNB of the LTE system. A technology that enables a user terminal to enable heterogeneous communication systems may be referred to as dual connectivity.

In order to transmit a signal from the electronic device to a communication network (eg, a base station), in the electronic device, a processor or data generated from the communication processor are transferred to a radio frequency integrated circuit (RFIC) and a radio frequency front end (RFFE) circuit (hereinafter, described below). For convenience, the signal may be processed through 'RFFE') and then transmitted to the outside of the electronic device through an antenna.

The electronic device may transmit a reference signal (eg, a sounding reference signal (SRS)) referenced by the base station of the communication network for channel estimation to at least one antenna through the RFFE. A communication network (eg, a base station) may efficiently allocate a downlink bandwidth by estimating a channel based on a reference signal transmitted from an electronic device, and may perform multi-antenna signal processing or beamforming processing. The electronic device may improve data reception performance by receiving a multi-antenna signal processing or beamforming-processed signal from a communication network (eg, a base station).

For example, an electronic device supporting 1T4R may sequentially transmit reference signals by connecting a transmission circuit with a switch for the four reception antennas Rx0, Rx1, Rx2, and Rx3. In this case, the power of the reference signal output through each antenna may be attenuated due to an RF path loss (PL) between the RFFE and the antenna. The downlink band allocation gain according to Tx antenna switching (TAS) of the reference signal has a higher effect as the power of the reference signal transmitted through each antenna of the electronic device is the same or similar, and the power of the reference signal When a difference (eg, a difference of 3 dB or more) occurs in the magnitude of the reference signal, the performance improvement effect by the reference signal may be deteriorated. Since the path loss on the RF transmission path from the RFFE to each antenna is different, and the maximum transmit power of the reference signal is limited by the compensation of the path loss (for example, limited based on the maximum path loss), each antenna The reference signal may be transmitted with relatively lower power than the maximum transmit power that can be transmitted through the .

In various embodiments, when the electronic device transmits the reference signal, the electronic device and the electronic device capable of increasing the maximum transmission power of the reference signal by adjusting the path loss setting value of the electronic device according to the magnitude of the target power of the reference signal may provide a method for transmitting

According to various embodiments, the electronic device includes a communication processor, at least one radio frequency integrated circuit (RFIC) connected to the communication processor, and each of the at least one RFIC and at least one radio frequency front- end) comprising a plurality of antennas connected through a circuit, wherein the communication processor transmits a reference signal with power set based on a path loss setting value for a transmission path corresponding to each antenna of the plurality of antennas; When the target power of the signal is greater than the maximum transmission power set for the reference signal, a difference between the target power of the reference signal and the set maximum transmission power is checked, and the difference between the target power of the reference signal and the set maximum transmission power is If it is less than or equal to a set threshold, it is possible to control to adjust a path loss setting value for a transmission path corresponding to at least one antenna among the plurality of antennas.

According to various embodiments, the electronic device may include a communication processor, at least one radio frequency integrated circuit (RFIC) connected to the communication processor, and at least one RFIC connected to the at least one RFIC configured to process a transmission signal a radio frequency front-end (RFFE) circuit, comprising a plurality of antennas connected through the at least one RFFE circuit, wherein the communication processor is measured from a received downlink signal than an expected data rate determined based on downlink channel information When the transmitted data rate is lower, it is possible to precode the reference signal based on a downlink signal, and control to transmit the precoded reference signal at a transmission time of the reference signal.

According to various embodiments, a method of operating an electronic device includes a communication processor, at least one radio frequency integrated circuit (RFIC) connected to the communication processor, and configured to be connected to the at least one RFIC to process a transmission signal A method for transmitting a reference signal in an electronic device including at least one radio frequency front-end (RFFE) circuit and a plurality of antennas connected through the at least one RFFE circuit, Transmitting a reference signal with power set based on a path loss set value for a corresponding transmission path, when the target power of the reference signal is greater than the maximum transmission power set for the reference signal, the target power of the reference signal and Checking the difference between the set maximum transmit power, and if the difference between the target power of the reference signal and the set maximum transmit power is less than or equal to a set threshold, for a transmission path corresponding to at least one of the plurality of antennas It may include the operation of adjusting the path loss setting value.

According to various embodiments, a method of operating an electronic device includes a communication processor, at least one radio frequency integrated circuit (RFIC) connected to the communication processor, and configured to be connected to the at least one RFIC to process a transmission signal A method for transmitting a reference signal in an electronic device including at least one radio frequency front-end (RFFE) circuit and a plurality of antennas connected through the at least one RFFE circuit, the method comprising: identifying based on downlink channel information When the data rate measured from the received downlink signal is lower than the expected data rate, the operation of precoding the reference signal based on the downlink signal, and transmitting the precoded reference signal at the time of transmission of the reference signal It can include actions.

According to various embodiments, when the electronic device transmits the reference signal, the possibility of being assigned a relatively higher modulation and coding scheme (MCS) level is increased by transmitting the transmission power by increasing the transmission power from a limited value according to the size of the target power of the reference signal. It is possible to increase the performance of the electronic device.

1 is a block diagram of an electronic device in a network environment, according to various embodiments of the present disclosure;

2A is a block diagram of an electronic device for supporting legacy network communication and 5G network communication, according to various embodiments of the present disclosure;

2B is a block diagram of an electronic device for supporting legacy network communication and 5G network communication, according to various embodiments of the present disclosure;

3A is a diagram illustrating wireless communication systems that provide a network of legacy communication and/or 5G communication according to various embodiments of the present disclosure;

3B is a diagram illustrating wireless communication systems that provide networks of legacy communication and/or 5G communication according to various embodiments of the present disclosure;

3C is a diagram illustrating wireless communication systems that provide networks of legacy communication and/or 5G communication according to various embodiments of the present disclosure;

4 is a block diagram of an electronic device according to various embodiments of the present disclosure;

5A is a diagram illustrating a reference signal transmission of an electronic device according to various embodiments of the present disclosure;

5B is a diagram illustrating a reference signal transmission of an electronic device according to various embodiments of the present disclosure;

6 is a flowchart illustrating a signal transmission/reception procedure between an electronic device and a communication network according to various embodiments of the present disclosure;

7 is a diagram illustrating a transmission period of a reference signal according to various embodiments of the present disclosure;

8 is a diagram illustrating a reference signal transmission concept of an electronic device according to various embodiments of the present disclosure;

9 is a diagram illustrating a power allocation concept in EN-DC according to various embodiments.

10 is a diagram illustrating a transmission path of a reference signal for each antenna of an electronic device according to various embodiments of the present disclosure;

11 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure.

12 is a diagram illustrating adjustment of a path loss set value for each antenna of an electronic device according to various embodiments of the present disclosure;

13 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure;

14 is a diagram illustrating maximum bandwidth adjustment of a reference signal according to various embodiments of the present disclosure;

15 is a diagram illustrating a change in an operation setting of a reference signal according to various embodiments of the present disclosure;

16A and 16B are flowcharts illustrating a method of operating an electronic device according to various embodiments of the present disclosure;

17 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure;

1 is a block diagram of an electronic device 101 in a network environment 100 according to various embodiments. Referring to FIG. 1 , in a network environment 100 , an electronic device 101 communicates with an electronic device 102 through a first network 198 (eg, a short-range wireless communication network) or a second network 199 . It may communicate with the electronic device 104 or the server 108 through (eg, a long-distance wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 . According to an embodiment, 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 , and a sensor module ( 176), interface 177, connection terminal 178, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196 , or an antenna module 197 may be included. In some embodiments, at least one of these components (eg, the connection terminal 178 ) may be omitted or one or more other components may be added to the electronic device 101 . In some embodiments, some of these components (eg, sensor module 176 , camera module 180 , or antenna module 197 ) are integrated into one component (eg, display module 160 ). can be

The processor 120, for example, executes software (eg, a program 140) to execute at least one other component (eg, a hardware or software component) of the electronic device 101 connected to the processor 120 . It can control and perform various data processing or operations. According to one embodiment, as at least part of data processing or operation, the processor 120 converts commands or data received from other components (eg, the sensor module 176 or the communication module 190 ) to the volatile memory 132 . may be stored in the volatile memory 132 , and may process commands or data stored in the volatile memory 132 , and store the result data in the non-volatile memory 134 . According to an embodiment, the processor 120 is the main processor 121 (eg, a central processing unit or an application processor) or a secondary processor 123 (eg, a graphic processing unit, a neural network processing unit) a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, when the electronic device 101 includes the main processor 121 and the sub-processor 123 , the sub-processor 123 may use less power than the main processor 121 or may be set to be specialized for a specified function. can The auxiliary processor 123 may be implemented separately from or as a part of the main processor 121 .

The auxiliary processor 123 is, for example, on behalf of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or the main processor 121 is active (eg, executing an application). ), together with the main processor 121, 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) It is possible to control at least some of the related functions or states. According to an embodiment, the co-processor 123 (eg, an image signal processor or a communication processor) may be implemented as part of another functionally related component (eg, the camera module 180 or the communication module 190). have. According to an embodiment, the auxiliary processor 123 (eg, a neural network processing device) may include a hardware structure specialized for processing an artificial intelligence model. Artificial intelligence models can be created through machine learning. Such learning may be performed, for example, in the electronic device 101 itself on which 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 in the above example not limited The artificial intelligence model may include a plurality of artificial neural network layers. Artificial neural networks include deep neural networks (DNNs), convolutional neural networks (CNNs), recurrent neural networks (RNNs), restricted boltzmann machines (RBMs), deep belief networks (DBNs), bidirectional recurrent deep neural networks (BRDNNs), It may be one of deep Q-networks or a combination of two or more of the above, but is not limited to the above example. The artificial intelligence model may include, in addition to, or alternatively, a software structure in addition to the hardware structure.

The memory 130 may store various data used by at least one component of the electronic device 101 (eg, the processor 120 or the sensor module 176 ). The data may include, for example, input data or output data for software (eg, the program 140 ) and instructions related thereto. The memory 130 may include a volatile memory 132 or a 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 in a component (eg, the processor 120 ) of the electronic device 101 from the outside (eg, a user) of the electronic device 101 . 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 a sound signal 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. The receiver may be used to receive an incoming call. According to one embodiment, the receiver may be implemented separately from or as part of the speaker.

The display module 160 may visually provide information to the outside (eg, a user) of the electronic device 101 . The display module 160 may include, for example, a control circuit for controlling a display, a hologram device, or a projector and a corresponding device. According to an embodiment, the display module 160 may include a touch sensor configured to sense a touch or a pressure sensor configured to measure the intensity of a force generated by the touch.

The audio module 170 may convert a sound into an electric signal or, conversely, convert an electric signal into a sound. According to an embodiment, the audio module 170 acquires a sound through the input module 150 , or an external electronic device (eg, a sound output module 155 ) connected directly or wirelessly with the electronic device 101 . A sound may be output through the electronic device 102 (eg, a speaker or headphones).

The sensor module 176 detects an operating state (eg, power or temperature) of the electronic device 101 or an external environmental state (eg, user state), and generates an electrical signal or data value corresponding to the sensed state. can do. According to an embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, It may include a temperature sensor, a humidity sensor, or an illuminance sensor.

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

The connection terminal 178 may include a connector through which the electronic device 101 can be physically connected to an external electronic device (eg, the electronic device 102 ). According to an embodiment, 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 an electrical signal into a mechanical stimulus (eg, vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic sense. According to an embodiment, 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 an 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 . According to an embodiment, the power management module 188 may be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

The battery 189 may supply power to at least one component of the electronic device 101 . According to one embodiment, battery 189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.

The communication module 190 is a direct (eg, wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (eg, the electronic device 102, the electronic device 104, or the server 108). It can support establishment and communication performance 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. According to one embodiment, the communication module 190 is a wireless communication module 192 (eg, a cellular communication module, a short-range communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (eg, : It may include a local area network (LAN) communication module, or a power line communication module). A corresponding communication module among these communication modules is a first network 198 (eg, a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network 199 (eg, legacy It may communicate with the external electronic device 104 through a cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (eg, a telecommunication network such as a LAN or a WAN). These various types of communication modules may be integrated into one component (eg, a single chip) or may be implemented as a plurality of components (eg, multiple chips) separate from each other. The wireless communication module 192 uses the subscriber information (eg, International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196 within a communication network such as the first network 198 or the second network 199 . The electronic device 101 may be identified or authenticated.

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

The antenna module 197 may transmit or receive a signal or power to the outside (eg, an external electronic device). According to an embodiment, the antenna module 197 may include an antenna including a conductor formed on a substrate (eg, a PCB) or a radiator formed of a conductive pattern. According to an embodiment, 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 is connected from the plurality of antennas by, for example, the communication module 190 . can be selected. 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. According to some embodiments, other components (eg, a radio frequency integrated circuit (RFIC)) other than the radiator may be additionally formed as a part of the antenna module 197 .

According to various embodiments, the antenna module 197 may form a mmWave antenna module. According to one embodiment, the mmWave antenna module comprises a printed circuit board, an RFIC disposed on or adjacent to a first side (eg, bottom side) of the printed circuit board and capable of supporting a designated high frequency band (eg, mmWave band); and a plurality of antennas (eg, an array antenna) disposed on or adjacent to a second side (eg, top or side) of the printed circuit board and capable of transmitting or receiving signals of the designated high frequency band. can do.

At least some of the components are connected to each other through a communication method between peripheral devices (eg, a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and a signal ( eg commands or data) can be exchanged with each other.

According to an embodiment, the command 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 . According to an embodiment, all or a part of operations executed in the electronic device 101 may be executed in one or more external

electronic devices

102 , 104 , or 108 . For example, when the electronic device 101 is to perform a function or service automatically or in response to a request from a user or other device, the electronic device 101 may perform the function or service itself instead of executing the function or service itself. Alternatively or additionally, one or more external electronic devices may be requested to perform at least a part of the function or the service. One or more external electronic devices that have received 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 transmit a result of the execution to the electronic device 101 . The electronic device 101 may process the result as it is or additionally and provide it as at least a part of a response to the request. For this, for example, 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. In another embodiment, 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 an embodiment, the external electronic device 104 or the server 108 may be included in the second network 199 . The electronic device 101 may be applied to an intelligent service (eg, smart home, smart city, smart car, or health care) based on 5G communication technology and IoT-related technology.

2A is a block diagram 200 of an electronic device 101 for supporting legacy network communication and 5G network communication, according to various embodiments. Referring to FIG. 2A , 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 , and a third RFIC 226 , fourth RFIC 228 , first radio frequency front end (RFFE) 232 , second RFFE 234 , first antenna module 242 , second antenna module 244 , third An antenna module 246 and antennas 248 may be included. The electronic device 101 may further include a processor 120 and a memory 130 . The second network 199 may include a first cellular network 292 and a second cellular network 294 . According to another embodiment, the electronic device 101 may further include at least one component among the components illustrated in FIG. 1 , and the second network 199 may further include at least one other network. According to an embodiment, a first communication processor 212 , a second communication processor 214 , a first RFIC 222 , a second RFIC 224 , a fourth RFIC 228 , a first RFFE 232 , and the second RFFE 234 may form at least a part of the wireless communication module 192 . According to another embodiment, the fourth RFIC 228 may be omitted or may be included as a part of the third RFIC 226 .

The first communication processor 212 may support establishment of a communication channel of a band to be used for wireless communication with the first cellular network 292 and legacy network communication through the established communication channel. According to various embodiments, 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 establishes 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 a 5G network through the established communication channel communication can be supported. According to various embodiments, the second cellular network 294 may be a 5G network defined by 3GPP. Additionally, according to an embodiment, the first communication processor 212 or the second communication processor 214 corresponds to another designated band (eg, about 6 GHz or less) among bands to be used for wireless communication with the second cellular network 294 . It is possible to support the establishment of a communication channel, and 5G network communication through the established communication channel.

The first communication processor 212 may transmit/receive data to and from the second communication processor 214 . For example, data classified to be transmitted over the second cellular network 294 may be changed to be transmitted over the first cellular network 292 . In this case, the first communication processor 212 may receive transmission data from the second communication processor 214 . For example, the first communication processor 212 may transmit/receive data through the second communication processor 214 and the interprocessor interface 213 . The interprocessor interface 213 may be implemented as, for example, a universal asynchronous receiver/transmitter (UART) (eg, high speed-UART (HS-UART) or peripheral component interconnect bus express (PCIe) interface). Alternatively, the first communication processor 212 and the second communication processor 214 may exchange control information and packet data information using, for example, a shared memory. The communication processor 212 may transmit/receive various information to and from the second communication processor 214 , such as sensing information, information on output strength, and resource block (RB) allocation information.

Depending on the implementation, the first communication processor 212 may not be directly connected to the second communication processor 214 . In this case, the first communication processor 212 may transmit and receive data through the second communication processor 214 and the processor 120 (eg, an application processor). For example, 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 the HS-UART interface or the PCIe interface, but There is no restriction on the type. Alternatively, 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). .

According to one embodiment, the first communication processor 212 and the second communication processor 214 may be implemented in a single chip or 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 a single package with the processor 120 , the co-processor 123 , or the communication module 190 . have. For example, as shown in FIG. 2B , the unified communication processor 260 may support both functions for communication with the first cellular network 292 and the second cellular network 294 .

The first RFIC 222, when transmitting, transmits a baseband signal generated by the first communication processor 212 from about 700 MHz to about 700 MHz used for the first cellular network 292 (eg, a legacy network). It can be converted to a radio frequency (RF) signal of 3 GHz. Upon reception, an RF signal is obtained from a first cellular network 292 (eg, a legacy network) via an antenna (eg, a first antenna module 242), and an RFFE (eg, a first RFFE 232) It can be preprocessed through 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, when transmitting, uses the baseband signal generated by the first communication processor 212 or the second communication processor 214 to the second cellular network 294 (eg, a 5G network). It can be converted into an RF signal (hereinafter, 5G Sub6 RF signal) of the Sub6 band (eg, about 6 GHz or less). Upon reception, a 5G Sub6 RF signal is obtained from a second cellular network 294 (eg, 5G network) via an antenna (eg, second antenna module 244 ), and an RFFE (eg, second RFFE 234 ) ) can be preprocessed. The second RFIC 224 may convert the preprocessed 5G Sub6 RF signal into a baseband signal to be processed by a corresponding one of the first communication processor 212 or the second communication processor 214 .

The third RFIC 226 transmits the baseband signal generated by the second communication processor 214 to the 5G Above6 band (eg, about 6 GHz to about 60 GHz) to be used in the second cellular network 294 (eg, 5G network). It can be converted into an RF signal (hereinafter referred to as 5G Above6 RF signal). Upon reception, a 5G Above6 RF signal may be obtained from the second cellular network 294 (eg, 5G network) via an antenna (eg, antenna 248 ) and pre-processed 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 . According to one embodiment, the third RFFE 236 may be formed as part of the third RFIC 226 .

According to an embodiment, the electronic device 101 may include the fourth RFIC 228 separately from or as at least a part of the third RFIC 226 . In this case, the fourth RFIC 228 converts the baseband signal generated by the second communication processor 214 into an RF signal (hereinafter, IF signal) of an intermediate frequency band (eg, about 9 GHz to about 11 GHz). After conversion, the IF signal may be transmitted to the third RFIC 226 . The third RFIC 226 may convert the IF signal into a 5G Above6 RF signal. Upon reception, a 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 . have. The fourth RFIC 228 may convert the IF signal into a baseband signal for processing by the second communication processor 214 .

According to an embodiment, the first RFIC 222 and the second RFIC 224 may be implemented as at least a part of a single chip or a single package. According to various embodiments, when the first RFIC 222 and the second RFIC 224 in FIG. 2A or 2B are implemented as a single chip or a single package, they may be implemented as an integrated RFIC. In this case, the integrated RFIC is connected to the first RFFE 232 and the second RFFE 234 , and the integrated RFIC provides a baseband signal to a band supported by the first RFFE 232 and/or the second RFFE 234 . may be converted into a signal of , and the converted signal may be transmitted to one of the first RFFE 232 and the second RFFE 234 . According to an embodiment, the first RFFE 232 and the second RFFE 234 may be implemented as at least a part of a single chip or a single package. According to an embodiment, at least one antenna module of the first antenna module 242 or the second antenna module 244 may be omitted or may be combined with another antenna module to process RF signals of a plurality of corresponding bands.

According to an embodiment, the third RFIC 226 and the antenna 248 may be disposed on the same substrate to form the third antenna module 246 . For example, the wireless communication module 192 or the processor 120 may be disposed on the first substrate (eg, main PCB). In this case, the third RFIC 226 is located in a partial area (eg, the bottom surface) of the second substrate (eg, sub PCB) separate from the first substrate, and the antenna 248 is located in another partial region (eg, the top surface). is disposed, the third antenna module 246 may be formed. By disposing the third RFIC 226 and the antenna 248 on the same substrate, it is possible to reduce the length of the transmission line therebetween. This, for example, can reduce loss (eg, attenuation) of a signal in a high-frequency band (eg, about 6 GHz to about 60 GHz) used for 5G network communication by the transmission line. Accordingly, the electronic device 101 may improve the quality or speed of communication with the second cellular network 294 (eg, a 5G network).

According to an embodiment, the antenna 248 may be formed as an antenna array including a plurality of antenna elements that can be used for beamforming. In this case, the third RFIC 226 may include, for example, as a part of the third RFFE 236 , a plurality of phase shifters 238 corresponding to the plurality of antenna elements. During transmission, each of the plurality of phase shifters 238 may transform 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. . Upon reception, each of the plurality of phase shifters 238 may convert the phase of the 5G Above6 RF signal received from the outside through a 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 (eg, 5G network) may be operated independently (eg, Stand-Alone (SA)) or connected to the first cellular network 292 (eg, legacy network). Example: Non-Stand Alone (NSA)). For example, the 5G network may have only an access network (eg, a 5G radio access network (RAN) or a next generation RAN (NG RAN)), and may not have a core network (eg, a next generation core (NGC)). In this case, after accessing the access network of the 5G network, 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. Protocol information for communication with a legacy network (eg, LTE protocol information) or protocol information for communication with a 5G network (eg, New Radio (NR) protocol information) is stored in the memory 130, and other components (eg, a processor 120 , the first communication processor 212 , or the second communication processor 214 ).

3A, 3B, and 3C are diagrams illustrating wireless communication systems that provide networks of legacy communication and/or 5G communication according to various embodiments. 3A, 3B, and 3C , the network environments 300a to 300c may include at least one of a legacy network and a 5G network. The legacy network includes, for example, a 4G or LTE base station 340 (eg, eNB (eNodeB)) of the 3GPP standard supporting wireless connection with the electronic device 101 and an evolved packet (EPC) for managing 4G communication. core) 342 . The 5G network, for example, manages 5G communication between the electronic device 101 and a New Radio (NR) base station 350 (eg, gNB (gNodeB)) supporting wireless connection and the electronic device 101 . It may include a 5th generation core (5GC) 352.

According to various embodiments, the electronic device 101 may transmit/receive a control message and user data through legacy communication and/or 5G communication. The control message is, for example, a message related to at least one of security control, bearer setup, authentication, registration, or mobility management of the electronic device 101 . may include The user data may refer to, for example, user data excluding a control message transmitted/received between the electronic device 101 and the core network 330 (eg, the EPC 342 ).

Referring to FIG. 3A , the electronic device 101 according to an embodiment uses at least a part of a legacy network (eg, the LTE base station 340 and the EPC 342 ) to at least a part of a 5G network (eg: The NR base station 350 and the 5GC 352 may transmit/receive at least one of a control message or user data.

According to various embodiments, network environment 300a provides wireless communication dual connectivity (DC) to LTE base station 340 and NR base station 350 , and either EPC 342 or 5GC 352 . It may include a network environment in which a control message is transmitted and received with the electronic device 101 through the core network 230 of the .

According to various embodiments, in a DC environment, one of the LTE base station 340 or the NR base station 350 operates as a master node (MN) 310 and the other operates as a secondary node (SN) 320 . can do. The MN 310 may be connected to the core network 230 to transmit and receive control messages. The MN 310 and the SN 320 may be connected through a network interface to transmit/receive messages related to radio resource (eg, communication channel) management with each other.

According to various embodiments, the MN 310 may be configured as the LTE base station 340 , the SN 320 may be configured as the NR base station 350 , and the core network 330 may be configured as the EPC 342 . For example, a control message may be transmitted/received through the LTE base station 340 and the EPC 342 , and user data may be transmitted/received through at least one of the LTE base station 340 and the NR base station 350 .

According to various embodiments, the MN 310 may include the NR base station 350 , the SN 320 may include the LTE base station 340 , and the core network 330 may include the 5GC 352 . For example, a control message may be transmitted/received through the NR base station 350 and the 5GC 352 , and user data may be transmitted/received through at least one of the LTE base station 340 or the NR base station 350 .

Referring to FIG. 3B , according to various embodiments, a 5G network may include an NR base station 350 and a 5GC 352 , and may independently transmit/receive a control message and user data to/from the electronic device 101 .

Referring to FIG. 3C , the legacy network and the 5G network according to various embodiments may independently provide data transmission/reception. For example, the electronic device 101 and the EPC 342 may transmit and receive a control message and user data through the LTE base station 340 . As another example, the electronic device 101 and the 5GC 352 may transmit and receive a control message and user data through the NR base station 350 .

According to various embodiments, the electronic device 101 may be registered with at least one of the EPC 342 and the 5GC 352 to transmit/receive a control message.

According to various embodiments, the EPC 342 or the 5GC 352 may interwork to manage communication of the electronic device 101 . For example, movement information of the electronic device 101 may be transmitted/received through an interface between the EPC 342 and the 5GC 352 .

As described above, dual connectivity through the LTE base station 340 and the NR base station 350 may be referred to as E-UTRA new radio dual connectivity (EN-DC).

Hereinafter, the structure of the electronic device 101 according to various embodiments will be described in detail with reference to FIG. 4 . In each drawing of the embodiments to be described later, one communication processor (eg, unified communication processor 260) and one RFIC 410 are illustrated as being connected to at least one

RFFE

431 and 432, but various implementations to be described later Examples are not limited thereto. For example, in various embodiments described below, as shown in FIG. 2A , a plurality of

communication processors

212 , 214 and/or a plurality of

RFICs

222 , 224 , 226 , 228 is a plurality of

RFFEs

431 , 432 . ) may be connected to each other.

Referring to FIG. 4 , an electronic device (eg, the electronic device 101 of FIG. 1 ) according to various embodiments includes a processor 120 , a communication processor 260 , an RFIC 410 , a first RFFE 431 , and a first 2 RFEE 432 , a first antenna 441 , a second antenna 442 , a third antenna 443 , a fourth antenna 444 , a first switch 451 , or a second switch 452 . can do. For example, the first RFFE 431 may be disposed on an upper portion within the housing of the electronic device 101 , and the second RFFE 432 may be disposed within the housing of the electronic device 101 . It may be disposed below 431, but various embodiments of the present disclosure are not limited to the arrangement position.

According to various embodiments, the RFIC 410, when transmitting, transmits a baseband signal generated by the communication processor 260 to a radio frequency (RF) signal used in the first communication network or the second communication network. can be converted to For example, the RFIC 410 may transmit an RF signal used for the first communication network to the first antenna 441 or the third antenna 443 through the first RFFE 431 and the first switch 451 . . The RFIC 410 transmits an RF signal used for the first communication network or the second communication network to the second antenna 442 or the fourth antenna 444 through the second RFFE 432 and the second switch 452 . can be transmitted According to various embodiments, the RFIC 410 transmits an RF signal corresponding to a first communication network (eg, NR) to the first antenna 441 or the third antenna 443 through the first RFFE 431 . and may transmit an RF signal corresponding to the second communication network (eg, LTE) to the second antenna 442 or the fourth antenna 444 through the second RFFE 432 . According to another embodiment, the RFIC 410 transmits an RF signal corresponding to a first communication network (eg, NR network or 5G network) or a second communication network (eg, LTE network) through a first RFFE 431 . Transmits to the first antenna 441 or the third antenna 443, and receives an RF signal corresponding to the same first communication network (eg, NR network or 5G network) or second communication network (eg, LTE network) By transmitting to the second antenna 442 or the fourth antenna 444 through the 2 RFFE 432 , it may operate as a multi-input multi-output (MIMO) antenna.

According to various embodiments, the transmission path transmitted from the RFIC 410 to the first antenna 441 through the first RFFE 431 and the first switch 451 is a 'first antenna transmission path (Ant Tx 1 ). ) can be referred to as '. A transmission path transmitted from the RFIC 410 to the third antenna 443 through the first RFFE 431 and the first switch 451 may be referred to as a 'third antenna transmission path (Ant Tx 3)'. have.

According to various embodiments, the RFIC 410, when transmitting, transmits a baseband signal generated by the communication processor 260 to a radio frequency (RF) signal used in the first communication network or the second communication network. can be converted to For example, the RFIC 410 transmits an RF signal used for the first communication network or the second communication network to the second antenna 442 or the fourth antenna 444 through the second RFFE 432 and the second switch 451 . ) can be transmitted.

According to various embodiments, the transmission path transmitted from the RFIC 410 to the second antenna 442 through the second RFFE 432 and the second switch 452 is a 'second antenna transmission path (Ant Tx 2 ). ) can be referred to as '. A transmission path transmitted from the RFIC 410 to the fourth antenna 444 through the second RFFE 432 and the second switch 452 may be referred to as a 'fourth antenna transmission path (Ant Tx 4)'. have.

According to various embodiments, upon reception, an RF signal is received from the first communication network through the first antenna 441 or the third antenna 443 , and the received RF signal is transmitted through at least one RFIC to a communication processor 260 . In addition, an RF signal is received from the first communication network or the second communication network through the second antenna 442 or the fourth antenna 444 , and the received RF signal is transmitted through at least one RFIC to the communication processor 260 . can be transmitted to

According to various embodiments, the first communication network and the second communication network may be the same or different communication networks. For example, the first communication network may be a 5G network (or NR network), and the second communication network may be a legacy network (eg, an LTE network). When the first communication network is a 5G network, the first RFFE 431 is designed to be suitable for processing a signal corresponding to the 5G network, and the second RFFE 432 processes a signal corresponding to the legacy network. It can be designed to be suitable for

According to various embodiments, a frequency band of a signal transmitted through the first RFFE 431 and a frequency band of a signal transmitted through the second RFFE 432 may be the same, similar, or different. For example, the frequency band of the signal transmitted through the first RFFE 431 may be the N41 band (2.6 GHz), which is the frequency band of the 5G network, and the frequency band of the signal transmitted through the second RFFE 431 is It may be the B41 band (2.6 GHz), which is the frequency band of the LTE network. In this case, the first RFFE 431 and the second RFFE 432 process the same or similar frequency band signals, but the first RFFE 431 is designed to enable signal processing suitable for the characteristics of the 5G network. In addition, the second RFFE 432 may be designed to enable signal processing suitable for the characteristics of the LTE network.

According to various embodiments, the electronic device transmits a signal through one of the first antenna 441 and the third antenna 443 through the first RFFE 431 and the first switch 451, and When the reference signal is transmitted through the first antenna 441 and the third antenna 443 , since one transmit antenna Tx and two receive antennas Rx are used, it may be referred to as '1T2R'.

According to various embodiments, the electronic device transmits a signal through one of the second antenna 442 and the fourth antenna 444 through the second RFFE 432 and the second switch 452 , and the When a reference signal is transmitted through the second antenna 442 and the fourth antenna 444 , one transmit antenna Tx and two receive antennas Rx are used, and thus may be referred to as '1T2R'.

According to various embodiments, when the electronic device transmits and receives data through the first RFFE 431 and the second RFFE 432 at the same time, two transmit antennas Tx and four receive antennas Rx are used, It may be referred to as '2T4R'. Since the electronic device illustrated in FIG. 4 may operate in 1T2R or 2T4R according to various embodiments, it may be referred to as an electronic device supporting '1T2R/2T4R'.

According to various embodiments, the communication processor 260 transmits a reference signal (eg, a sounding reference signal (SRS)) referenced for channel estimation in a base station of a first communication network to the first RFFE circuit ( 431 ), it is possible to control transmission to at least one antenna (the first antenna 441 or the third antenna 443 ) among the plurality of antennas of the first antenna group. According to various embodiments, the communication processor 260 transmits the reference signal referenced for channel estimation in the base station of the first communication network to the plurality of antennas of the second antenna group through the second RFFE circuit 432 . It may be controlled to additionally transmit to at least one of the antennas (the second antenna 442 or the fourth antenna 444 ). When the electronic device transmits a reference signal through the first antenna 441 , the second antenna 442 , the third antenna 443 , and the fourth antenna 444 , the base station of the first communication network performs the reference signal A signal may be received and channel estimation may be performed through the received reference signal. The base station of the first communication network may transmit beamformed signals with respect to the first antenna 441 , the second antenna 442 , the third antenna 443 , and the fourth antenna 444 . The electronic device may receive a signal transmitted from the base station of the first communication network through the first antenna 441 , the second antenna 442 , the third antenna 443 , or the fourth antenna 444 . . The electronic device shown in FIG. 4 is designed as an electronic device supporting '1T2R/2T4R', but according to various embodiments, the first antenna 441 , the second antenna 442 , and the third antenna 443 . , or by transmitting a reference signal to the base station of the first communication network through the fourth antenna 444 , it may operate as '1T4R'.

According to various embodiments, it has been described in FIG. 4 that one RFIC 410 is connected to two

RFFEs

431 and 432 to transmit a reference signal (eg, SRS), but at least one RFIC includes three or more RFFEs. The above-described embodiments may also be applied to various types of structures connected to and in which each RFFE is connected to at least one antenna.

5A and 5B are diagrams illustrating reference signal transmission of an electronic device according to various embodiments of the present disclosure; Referring to FIG. 5A , the electronic device 101 (eg, the electronic device 101 of FIG. 1 ) has four antennas (eg, a first antenna 511 , a second antenna 512 , and a third antenna 513 ). , or the fourth antenna 514) may transmit a reference signal (eg, SRS). For example, the electronic device 101 amplifies a reference signal through at least one power amplifier (PA) 515 , and through at least one switch 516 , a first antenna 511 , a second antenna ( 512), the third antenna 513, and the fourth antenna 514) may transmit the amplified reference signal. A reference signal (eg, the first antenna 511 , the second antenna 512 , the third antenna 513 , or the fourth antenna 514 ) of the electronic device 101 is transmitted through SRS) may be received via each antenna 521 of the base station 520 (eg, gNB).

According to various embodiments, the electronic device 101 may transmit a reference signal through a plurality of power amplifiers (eg, RFFEs) as described above with reference to FIG. 4 . For example, the electronic device 101 sets a signal transmitted to the first antenna 511 or the third antenna 513 to be processed through a first amplifier (eg, the first RFFE 431 ), and the second antenna 512 , or a signal transmitted to the fourth antenna 514 may be configured to be processed through a second amplifier (eg, the second RFFE 432 ).

According to various embodiments, the base station 520 receives the reference signal transmitted from the electronic device 101, and each antenna (eg, the first antenna 511, the second antenna 511) of the electronic device 510 from the received reference signal. The antenna 512 , the third antenna 513 , or the fourth antenna 514 ) may estimate a channel (channel estimate(ch.est.)). The base station 520 may transmit a beamformed signal to each antenna of the electronic device 101 based on the channel estimation. According to various embodiments, the base station 520 sets a modulation and coding scheme (MCS) level for an uplink signal of the electronic device 101 based on the channel estimation, and transmits the set MCS level setting information to a downlink (DCI) level. control information) may be included as SRS resource indicator (SRI) information and transmitted to the electronic device 101 . The electronic device 101 may determine the transmission power of a physical uplink shared channel (PUSCH) based on the parameter set for power control included in the SRI.

In FIG. 5A , the power amplifier 515 and the switch 516 are shown as one for convenience of description, and a plurality of antennas (a first antenna 511 , a second antenna 512 , a third antenna 513 , or a fourth It will be readily understood by those skilled in the art that although not shown as connected to the antenna 514). For example, the electronic device 101 may include components included in the electronic device 101 illustrated in FIG. 4 .

Also, in FIG. 5A , the first antenna 511 , the second antenna 512 , the third antenna 513 , and the fourth antenna 514 are illustrated as being disposed outside the electronic device 101 , but this is for convenience of explanation. The first antenna 511 , the second antenna 512 , the third antenna 513 , or the fourth antenna 514 for Those skilled in the art will readily understand that it may be located in , and this may be applied to other drawings as well.

Referring to FIG. 5B , the base station 520 may transmit the beamformed signal through an array antenna 521 including a plurality (eg, 32) of antennas. The signal transmitted from the base station 520 is transmitted to each antenna (eg, the first antenna 511 , the second antenna 512 , the third antenna 513 , or the fourth antenna 514 of the electronic device 101 ). ), and as shown in FIG. 5B , each antenna (eg, 1 antenna 511 , a second antenna 512 , and a third A signal may be received in the form of a beam directed to the antenna 513 , or the fourth antenna 514 ).

5A and 5B, when the electronic device 101 transmits a reference signal (eg, SRS) through a plurality of transmission paths, the base station 520 receives each antenna (eg, , the first antenna 511, the second antenna 512, the third antenna 513, or the fourth antenna 514) can be beamformed by checking the channel environment, and as a result, RSRP of the downlink channel (reference signal received power) and/or signal to noise ratio (SNR) may be improved. When the RSRP and/or SNR of the downlink channel is improved, a rank index (RI) or a channel quality indicator (CQI) for the corresponding electronic device may be increased. The base station 520 allocates a high rank or MCS (modulation and code schemes) to the corresponding electronic device 101 based on the improved performance of the corresponding electronic device 101 . Downlink data rates (eg, throughput (T-put)) may be improved.

According to various embodiments, the base station 520 may use a downlink reference signal for downlink channel estimation. For example, when the base station 520 transmits the downlink reference signal to the electronic device 101 , the electronic device 101 may receive the downlink reference signal transmitted from the base station 520 and perform channel estimation. The electronic device 101 may transmit the channel estimation result to the base station 520 , and the base station 520 performs downlink beamforming with reference to the channel estimation result transmitted from the electronic device 101 . can According to various embodiments, when the base station 520 performs channel estimation by the reference signal (eg, SRS) transmitted from the electronic device 101, the channel estimation is performed faster than the channel estimation by the downlink reference signal. can do.

According to various embodiments, by transmitting a UE Capability Inquiry message to the electronic device 101 in a first communication network (eg, a base station (gNB)) or a second communication network (eg, a base station (eNB)), the electronic device 101 ) of various setting information can be requested. For example, the first communication network (eg, a base station (gNB)) or the second communication network (eg, a base station (eNB)) may request information related to the reception antenna of the electronic device 101 through the UE Capability Inquiry message. have. The electronic device 101 may receive a UE Capability Inquiry message from the first communication network or the second communication network, and may transmit a UE Capability Information message to the first communication network or the second communication network in response thereto. According to various embodiments, information related to the reception antenna of the electronic device 101 may be included in the UE Capability Information message, such as 'supportedSRS-TxPortSwitch t1r4' or 'supportedSRS-TxPortSwitch t2r4', according to the contents of the UE Capability Inquiry message. have.

As the antenna-related information is described as 'supportedSRS-TxPortSwitch t1r4' or 'supportedSRS-TxPortSwitch t2r4', the first communication network enables the electronic device 101 to transmit a signal using four reception antennas. is determined, and information on a time to transmit a reference signal (eg, SRS) for each antenna for each of the four antennas may be included in the RRC Reconfiguration message and transmitted.

6 is a flowchart illustrating a signal transmission/reception procedure between an electronic device and a communication network according to various embodiments of the present disclosure; Referring to FIG. 6 , the electronic device 101 may establish an RRC connection with a first communication network (eg, a base station (gNB)) 600 through a random access channel (RACH) procedure.

According to various embodiments, in operation 610 , the first communication network 600 may transmit an RRC Reconfiguration message to the electronic device 101 . For example, the first communication network 600 may transmit an RRC Reconfiguration message in response to the RRC Request message transmitted by the electronic device 101 . Referring to <Table 1> below, information related to SRS antenna switching (eg, SRS-ResourceSet) may be included in the RRC Reconfiguration message.

SRS-ResourceSet
srs-ResourceSetId: 1
srs-ResourceIdList: 4 Items
Item 0
SRS-ResourceId: 1
Item 1
SRS-ResourceId: 2
Item 2
SRS-ResourceId: 3
Item 3
SRS-ResourceId: 4
resourceType: periodic (2)
periodic
usage: antennaSwitching (3)
alpha: alpha1 (7)
p0: -62dBm
pathlossReferenceRS: ssb-Index (0)
ssb-Index: 1

Also, as shown in Table 2 below, in the RRC Reconfiguration message, information on a time point at which the electronic device 101 transmits a reference signal (eg, SRS) for each antenna may be included.

perodicityAndOffset-p s120 : 17perodicityAndOffset-p s120:17
perodicityAndOffset-p s120 : 7perodicityAndOffset-p s120: 7
perodicityAndOffset-p s120 : 13perodicityAndOffset-p s120:13
perodicityAndOffset-p s120 : 3perodicityAndOffset-p s120:3
nrofSymbols n1nrofSymbols n1

Referring to the RRC Reconfiguration message, it can be seen that as described in "nrofSymbols n1.", the duration of SRS transmission may be determined by an allocated symbol. In addition, referring to the RRC Reconfiguration message, as described in "periodicityAndOffset-p s120: 17", the first SRS is set to be transmitted in the 17th slot while transmitting once every 20 slots, and "periodicityAndOffset-p s120: 7" As described in ", the second SRS is set to transmit in the 7th slot while transmitting once every 20 slots, and as described in "periodicityAndOffset-p s120: 13", the third SRS is transmitted once every 20 slots It is set to transmit in the 13th slot, and as described in "periodicityAndOffset-p s120: 3", the 4th SRS is set to transmit in the 3rd slot while transmitting once every 20 slots. According to various embodiments, the electronic device 101 may transmit 4 SRSs at different times through each antenna in every 20 slots according to the RRC Reconfiguration setting. The size of the one slot may be determined by subcarrier spacing (SCS). For example, when the SCS is 30 KHz, the time interval of one slot may be 0.5 ms, and the time interval of 20 slots may be 10 ms. Accordingly, the electronic device 101 may repeatedly transmit the SRS at different times through each antenna every 10 ms period. According to various embodiments, one slot may include 14 symbols, and assuming that one symbol is allocated for one SRS transmission, a symbol duration of 0.5 ms * 1/14 = 35 μs (0.035 ms) time (or symbol enable time).

According to various embodiments, in operation 620 , the electronic device 101 may transmit an RRC Reconfiguration Complete message to the first communication network 600 . As the RRC reconfiguration procedure is normally completed, in operation 630 , the electronic device 101 and the first communication network 600 may complete RRC connection establishment (“Established Connection”).

Referring back to FIG. 4 , according to various embodiments, the communication processor 260 and/or the RFIC 410 transmits the reference signal (eg, SRS) received from the first communication network 600 as described above. Based on information on A reference signal may be transmitted at different times.

7 is a diagram illustrating a transmission period of a reference signal according to various embodiments of the present disclosure; 8 is a diagram illustrating a reference signal transmission concept of an electronic device according to various embodiments of the present disclosure;

Referring to FIGS. 7 and 8 , for example, a set number of SRSs (eg, 4) may be transmitted every set SRS transmission period (eg, 10 ms, 20 ms, 40 ms, or 80 ms). As described above in the description of FIG. 6 , when the electronic device (eg, the electronic device 101 of FIG. 1 ) is set to '1T4R', the SRS transmission period (eg, 10 ms, 20 ms, 40 ms, or 80 ms), 4 SRSs may be transmitted at different times through each antenna within 20 slots (eg, 10 ms). For example, in the 17th slot among the 20 slots, the first SRS (SRS 0) is transmitted through the first antennas 441 and 511 (RX0) (Ant.port0), and in the 7th slot, the second antenna 442, 512) (RX1) (Ant.port1) transmits the second SRS (SRS 1), and in the 13th slot, the third SRS ( SRS 2), and in the third slot, the fourth SRS (SRS 3) may be transmitted through the fourth antennas 444 and 514 (RX3) (Ant.port3).

According to various embodiments, when the electronic device 101 is set to '2T4R', according to the setting of the RRC Reconfiguration, every SRS transmission period (eg, 10 ms, 20 ms, 40 ms, or 80 ms) in 20 slots (eg, 10 ms) 4 SRS can be transmitted at different times through each antenna. For example, the electronic device 101 transmits the first SRS (SRS 0) through the first antennas 441 and 511 (RX0) (Ant.port0) at the first time point, and the second antennas 442 and 512 ( The second SRS (SRS 1) may be transmitted through RX1) (Ant.port1). The electronic device 101 transmits the third SRS (SRS 2) through the third antennas 443 and 513 (RX2) (Ant.port2) at the second time point, and the fourth antennas 444 and 514 (RX3) A fourth SRS (SRS 3) may be transmitted through (Ant.port3).

According to various embodiments, the reference signal is a sounding reference signal (SRS) used for multi-antenna signal processing (eg, multi input multi output (MIMO) or beamforming) through uplink channel state measurement. However, the present invention is not limited thereto. For example, although SRS is used as an example of the reference signal in the above description or the following description, any type of uplink reference signal (eg, uplink DM-RS) transmitted from the electronic device 101 to the base station signal)) may also be included in a reference signal to be described later.

According to various embodiments, the SRS transmission power for each antenna set during SRS transmission may affect the performance of the electronic device. For example, the SRS transmission power of the electronic device uses dynamic power sharing (DPS) by an uplink split (UL) split operation and an RF path loss for an SRS antenna switching operation. ; PL) may be determined in consideration of compensation. Hereinafter, the concept of dynamic power sharing will be described with reference to FIG. 9 , and the concept of RF path loss compensation will be described with reference to FIG. 10 .

9 is a diagram illustrating a power allocation concept in EN-DC according to various embodiments. Referring to FIG. 9 , when an LTE base station and an NR base station are simultaneously connected in an electronic device (eg, the electronic device 101 of FIG. 1 ) to operate as EN-DC, each base station independently sets the maximum allowable power of the electronic device. can be set to For example, LTE maximum allowable power (P _{max_LTE} ) and NR maximum allowable power (P _{max_NR} ) may be set independently. When the electronic device simultaneously transmits to the LTE base station and the NR base station, as shown in FIG. 9 , the sum of the LTE transmit power (P _LTE ) and the NR transmit power (P _NR ) exceeds the maximum allowable power of the electronic device In this case (eg, P _LTE + P _NR > P _{max_EN-DC} ), the transmission power transmitted to the NR base station may be lowered to control so as not to exceed the maximum allowable power for simultaneous transmission. According to various embodiments, whether the electronic device can simultaneously transmit a signal to the LTE base station and the NR base station may be determined by the UL split configuration of the base station (eg, eNB, gNB), and related parameters are described in Table 3 below. can be expressed as

ParametersParameters	설정 값set value
ul-DataSplitThresholdul-DataSplitThreshold	b51200b51200

Referring to <Table 3>, when the amount of data to be transmitted from the electronic device is greater than or equal to a set value (eg, 51200 bytes (409600 bits)), the electronic device simultaneously transmits uplink data to the LTE base station and the NR base station. can

10 is a diagram illustrating a transmission path of a reference signal for each antenna of an electronic device according to various embodiments of the present disclosure; Referring to FIG. 10 , each SRS signal is transmitted to each

antenna

511 , 512 , 512 , and 514 through an RFIC 410 , an amplifier 1010 , and an antenna switching module (ASM) 1020 . can

According to various embodiments, when the SRS operation of '1T4R' is set in the electronic device (eg, the electronic device 101 of FIG. 1 ), the ASM 1020 is connected to the four

antennas

511 , 512 , 513 , and 514 of the electronic device. ) is connected, and each antenna may operate by being mapped with resources in the SRS set. For example, the first SRS is mapped to the first antenna 511 (Ant_port0), which is the main antenna, the second SRS is mapped to the second antenna 512 (Ant_port1), and the third SRS is mapped to the third antenna 513 ( Ant_port2) and the fourth SRS may be mapped to the fourth antenna 514 (Ant_port3) and transmitted through the corresponding antenna, respectively.

According to various embodiments, a path loss of a transmission path through which each SRS is transmitted (eg, an RF transmission path between an RFFE and an antenna) may be different from each other. For effective SRS transmission (eg, in order to output the same or similar power magnitude of SRS output from each antenna), compensation for different physical RF path loss corresponding to each antenna may be considered.

For example, as shown in FIG. 10 , a path loss (PL_1) corresponding to the second antenna 512 based on a path loss (RF path loss = PL_0) corresponding to the first antenna 511 (Ant_port0), which is the main antenna. , a path loss PL_2 corresponding to the third antenna 513 , and a path loss PL_3 corresponding to the fourth antenna 514 may be considered for compensation. According to various embodiments, in order to enable the SRS transmitted to each antenna to be transmitted with the same or similar power, the SRS transmission power for each antenna may be determined by adding a path loss to the SRS target power. According to various embodiments, in order for the SRS transmitted from each antenna to be transmitted with the same or similar power, the maximum SRS transmission power of the electronic device may be determined as shown in Equation 1 below in consideration of the antenna having the largest RF path loss. have.

Referring to <Equation 1>, the SRS maximum transmission power P _{max_RF_pl_comp in consideration of path loss compensation may be set to a value obtained by subtracting the largest path loss value from the maximum transmission power P max_UE} _of the electronic device. . For example, when the maximum transmit power (P _{max_UE} ) of the electronic device is 27 dBm and the path loss for each antenna is 0 dB, 2 dB, 5 dB, or 7 dB, the SRS maximum transmit power (P _{max_RF_pl_comp} ) in which the path loss compensation is considered is the electronic device It may be set to 20 dBm by subtracting 7 dB, which is the largest path loss value, from 27 dBm, which is the maximum transmit power (P _{max_UE} ) of . According to various embodiments, the electronic device may amplify in consideration of the path loss so that the same power of 20 dBm is output from each antenna during SRS transmission. For example, in the first SRS, a signal of 20 dBm is output in consideration of the path loss PL_0 from the amplifier 1010, and since the path loss PL_0 is 0 dB, a signal of 20 dBm can be output through the first antenna 511. . In the second SRS, a signal of 22 dBm is output in consideration of the path loss PL_1 from the amplifier 1010 , and since the path loss PL_1 is 2 dB, a signal of 20 dBm may be output through the second antenna 512 . In the third SRS, a signal of 25 dBm is output in consideration of the path loss PL_2 from the amplifier 1010 , and since the path loss PL_2) is 5 dB, a signal of 20 dBm may be output through the third antenna 513 . In the fourth SRS, a signal of 27 dBm is output in consideration of the path loss PL_3 from the amplifier 1010 , and since the path loss PL_3 is 7 dB, a signal of 20 dBm may be output through the fourth antenna 511 .

Hereinafter, a reference signal transmission method according to various embodiments will be described with reference to FIGS. 11, 12, 13, 14, 15, 16A, 16B, and 17 . The methods to be described later are the electronic device 101 of FIGS. 1, 2A, 2B, 3B, 3C, 4, 5A, 5B, 6, 7, 8, 9, or 10 described above. ) can be done through

11 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure; As described above in FIG. 10 , the maximum SRS transmission power of the electronic device may be determined as a value reduced by the largest value among path losses for each antenna from the maximum transmission power transmittable by the electronic device.

According to various embodiments, the SRS target power actually transmitted from the electronic device may be changed according to a channel state that is changed in real time, and may be determined according to transmitting power control (TPC) by the base station. have.

According to various embodiments, the SRS target power may be determined based on the maximum power (eg, UE Tx MAX Power) of the electronic device 101 . The electronic device 101 may determine the SRS target power (or SRS output power) based on Equation 2 below according to 3GPP TS 38.213, for example.

The definition of <Equation 2> may follow 3GPP TS 38.213. For example, P _{O_SRS,b,f,c(qs)} is SRS provided by SRS-ResourceSet and SRS-ResourceSetID according to SRS configuration. It may be provided by p0 for the activation uplink bandwidth part (BWP) (UL BWP) (b) of the carrier (f) of the resource set (qs) and the serving cell (c). M _SRS,b,f,c (i) is represented by the number of resource blocks for the SRS transmission occasion (i) on the activation UL BWP (b) of the carrier (f) of the serving cell (c) SRS BW (bandwidth), μ is SCS. α _{SRS,b,f,c(qs)} is provided by the SRS resource set (q _s ) and the alpha for the activation UL BWP of the carrier f of the serving cell c. PL _b,f,c (q _d ) is, for the SRS resource set (q _s ) and the active downlink BWP (DL BWP) of the serving cell (c), the RS resource index (q _d ) using the UE (user It is a downlink pathloss predicted in dB by the equipment. h _b,f,c (i) may be δ _SRS,b,f,c (i), the condition may comply with 3GPP TS 38.213, and may be adjusted by DCI (downlink control information) from the base station is the value The maximum transmission power of the electronic device 101 is the maximum available transmission power PcMax of the electronic device 101 in consideration of the characteristics of the electronic device 101 and a power class set in the electronic device 101. It may be determined as a minimum value among maximum transmission power (PeMax) and maximum transmission power (SAR Max Power) in consideration of a specific absorption rate (SAR) backoff event, but the determination method is not limited. In one example, the maximum transmission power for the SRS may be set to be greater than the maximum transmission power (UE TX Max Power) of a general electronic device. The electronic device 101 may determine, for example, a lower value of the SRS target power and the maximum transmission power of the electronic device as the SRS target power. The electronic device 101 may transmit the SRS with the SRS target power by controlling a power amplifier installed inside or outside the RFFE. In various embodiments, transmitting the SRS at a specific size may mean controlling at least one amplifier in the electronic device 101 so that power (eg, in dBm) corresponding to the specific size is provided to the antenna. .

According to various embodiments, as described above in the description of FIG. 10 , the maximum SRS transmission power of the electronic device may be determined as a value reduced by the largest value among path losses corresponding to each antenna from the maximum transmission power transmittable by the electronic device. can According to various embodiments, in an environment in which the SRS target power is higher than the SRS maximum transmission power (eg, a weak electric field), performance gain is expected to be transmitted while the compensation value considering the path loss is basically set as shown in FIG. 10 . It can be difficult to do. 11 , which will be described later, in a situation where the SRS target power is higher than the SRS maximum transmission power, the SRS may be transmitted more strongly by increasing the maximum transmission power in consideration of the preset path loss.

Referring to FIG. 11 , according to various embodiments, the electronic device 101 (eg, the communication processor 260 of the electronic device) transmits antenna related information (eg, gNB) to a base station (eg, gNB) according to the SRS operation setting in operation 1110 . , antenna switching capability related information) can be controlled to be transmitted. According to 3GPP TS 38.331, for example, the electronic device 101 may include the antenna-related information in the BandCombinationList of UE Capability Information and transmit it to the base station as shown in Table 4 below.

BandParameters-v1540 ::= SEQUENCE {
…

srs-TxSwitch SEQUENCE {
supportedSRS-TxPortSwitch ENUMERATED { t1r2, t1r4, t2r4, t1r4-t2r4, t1r1, t2r2, t4r4, notSupported },
txSwitchImpactToRx INTEGER (1..32) OPTIONAL,
txSwitchWithAnotherBand INTEGER (1..32) OPTIONAL
}

According to various embodiments, when the electronic device includes one transmit antenna and four receive antennas, the antenna-related information includes information indicating that the electronic device supports one transmit antenna and four receive antennas ( For example, information related to antenna switching capability) may be included. The antenna-related information can be transmitted by being included in the UE Capability Information message as shown in Table 4 above. The UE Capability Information message may include information related to the reception antenna of the electronic device 101 according to the contents of the UE Capability Inquiry message, such as 'supportedSRS-TxPortSwitch t1r4'. According to various embodiments, the electronic device may receive information related to a transmission time of a reference signal (eg, SRS) through each antenna from the base station. For example, the electronic device 101 may transmit a reference signal (eg, SRS) to each antenna at the transmission time of the reference signal in a state set to '1T4R'.

According to various embodiments, the electronic device 101 (eg, the communication processor 260 of the electronic device) may determine whether the SRS target power exceeds the SRS maximum transmission power in operation 1120 . According to various embodiments, the SRS target power may be determined by Equation 2 above, and the SRS maximum transmission power is the path loss for each antenna in the maximum transmission power of the electronic device as described above with reference to FIG. 10 . It can be determined by considering the maximum value of .

According to various embodiments, if it is determined that the SRS target power does not exceed the SRS maximum transmission power (operation 1120 - NO), the electronic device 101 maintains the currently set SRS maximum transmission power in operation 1190 and each SRS SRS may be transmitted at the time of transmission.

According to various embodiments, if it is determined that the SRS target power exceeds the SRS maximum transmission power (operation 1120 - Yes), the electronic device 101 may check the difference between the SRS target power and the SRS maximum transmission power in operation 1130 have. As a result of the check, if the power difference between the SRS target power and the SRS maximum transmission power is not equal to or less than a preset first threshold value in operation 1140 (operation 1140 - NO), the electronic device 101 sets the currently set SRS maximum transmission power in operation 1190 SRS may be transmitted at each SRS transmission time point while maintaining .

According to various embodiments, as a result of the check, if the power difference between the SRS target power and the SRS maximum transmission power in operation 1140 is less than or equal to a preset first threshold value (operation 1140 - Yes), the electronic device 101 performs the current operation in operation 1150 It can be set to increase the set SRS maximum transmit power. As the SRS maximum transmission power is set to increase, the electronic device 101 may update the path loss setting value for each antenna to a value changed from the previous value in operation 1160 . In operation 1170 , the electronic device 101 may transmit the SRS for each antenna with power set based on the updated path loss setting value. Hereinafter, an example of increasing the SRS maximum transmission power will be described with reference to FIG. 12 .

12 is a diagram illustrating adjustment of a path loss set value for each antenna of an electronic device according to various embodiments of the present disclosure; Referring to FIG. 12 , the initial compensation value of the path loss of the electronic device 101 is 0/2/5/7 dB for each

antenna

511 , 512 , 513 , and 514 (Ant_port0/1/2/3), respectively. It can be assumed that the case is set to .

According to various embodiments, when the base station (eg, eNB, gNB) configures the UL split as described above in Table 3, the electronic device 101 may determine the transmission power by applying LTE-NR DPS. . For example, when the size of data to be transmitted is 51200 bytes or less and only NR UL transmission is considered, the NR maximum transmission power (P _{max_NR} ) of the electronic device may be set to 23 dBm (eg, in the case of Power Class 3). If the size of transmission data is 51200 bytes or more and simultaneous transmission of SRS and LTE UL data is required, in a channel environment that requires a reduction in the NR maximum transmission power of an electronic device, do not transmit data to the LTE base station to ensure SRS transmission power. You can also control it.

According to various embodiments, when the NR maximum transmit power is set to 23 dBm and a conduction offset and a digital gain margin value are considered, the electronic device 101 (eg, the electronic device 101) The maximum transmit power (P _{max_UE} ) that can be transmitted in the RFFE ( 410 ) of may be set to 27 dBm. Here, when considering the path loss (max{RF path loss}) for each antenna as 7dB as described above in FIG. 10 , the maximum SRS transmission power (P _{max_SRS} ) may be set to 20dBm (=27dBm-7dB). . For example, when the SRS target power is 20 dBm or more, the SRS maximum transmission power may be limited to 20 dBm.

According to various embodiments, the first threshold value may be set to a value at which a performance gain through an increase in SRS transmission power can be expected, and the first threshold value may be assumed to be 10 dB. For example, if the SRS target power (P _{target_SRS} ) calculated based on the signal received from the base station is 28 dBm and the SRS maximum transmit power (P _{max_SRS} ) is 20 dBm as described above, the power difference (P _{gap_SRS} ) is 8 dB, the first threshold Since the value is 10 dB or less, it is possible to set the increase in the maximum SRS transmission power and adjust the path loss setting value for each antenna from a preset value (default value). According to various embodiments, when the power difference (P _{gap_SRS} = 8 dB) is greater than max {RF path loss} = 7 dB, it is difficult to increase the maximum transmission power over max {RF path loss} _{max_SRS_incremet} ) may be selected up to a maximum of 7 dB. As another embodiment, when the power difference (P _{gap_SRS} ) is 5 dB and max{RF path loss} = 7 dB, since it is not necessary to increase the transmission power more than the power difference (P _{gap_SRS} ), the increase in the SRS maximum transmission power ( P _{max_SRS_incremet} ) may be set to 5 dB. The increment {Pmax_SRS_increment(i), i=0, 1, 2, 3} for each antenna port within the increment (P _{max_SRS_incremet} ) of the SRS maximum transmit power determined according to the above example becomes {0, 2, 5, 7} can For example, as shown at the bottom of FIG. 12 , the path loss is a result of subtracting the increment (eg, 0, 2, 5, 7) for each antenna from the existing path loss set value (eg, 0, 2, 5, 7). Settings can be updated.

According to various embodiments, the increase of the SRS maximum transmit power may be performed in stages. For example, referring to <Table 5> below, the SRS transmission power for each antenna may be initially set based on the following path loss setting values.

	Ant_Port 0 Ant_Port 0	Ant_Port 1 Ant_Port 1	Ant_Port 2 Ant_Port 2	Ant_Port 3 Ant_Port 3
최대 전송 전력 (P_{max_UE})(dBm)Maximum transmit power (P _{max_UE} ) (dBm)	2727	2727	2727	2727
경로 손실(dB)Path Loss (dB)	00	22	55	77
SRS 최대 전송 전력(P_{max_SRS})SRS maximum transmit power (P _{max_SRS} )	2020	2020	2020	2020
여유 전송 전력(dB)Redundant transmit power (dB)	77	55	22	00

Referring to <Table 5>, since the maximum SRS transmission power (P _{max_SRS} ) transmitted from each antenna of the electronic device 101 must be the same or similar, the maximum value of the path loss (max(RF Path Loss)) is 7 dB. The maximum SRS transmission power transmitted from each antenna may be limited to 20 dBm. When the maximum SRS transmission power is limited as shown in Table 5, antennas other than the fourth antenna (ant_port3) may not be used even though there is spare transmission power. According to various embodiments, in a weak electric field situation in which the SRS maximum transmit power is insufficient compared to the SRS target power, the maximum transmit power can be adjusted by changing max (RF path loss) as a method to additionally use the spare transmit power for each antenna. have. For example, when the SRS target power exceeds the SRS maximum transmission power and the power difference is less than or equal to the first threshold as in the above-described

operations

1120 and 1140, max (RF path loss) is increased from 7 dB to 5 dB as shown in Table 6 below. By adjusting the SRS maximum transmit power can be increased to 22dBm.

	Ant_Port 0 Ant_Port 0	Ant_Port 1 Ant_Port 1	Ant_Port 2 Ant_Port 2	Ant_Port 3 Ant_Port 3
최대 전송 전력 (P_{max_UE})(dBm)Maximum transmit power (P _{max_UE} ) (dBm)	2727	2727	2727	2727
경로 손실(dB)Path Loss (dB)	00	22	55	55
SRS 최대 전송 전력(P_{max_SRS})SRS maximum transmit power (P _{max_SRS} )	2222	2222	2222	2222
여유 전송 전력(dB)Redundant transmit power (dB)	55	33	00	00

Referring to <Table 6>, in order to adjust max (RF path loss) from 7 dB to 5 dB, the path loss setting value of the fourth antenna Ant_Port 3 may be updated from a preset 7 dB to 5 dB. The updated path loss settings may be stored in a memory (eg, a memory within a communication processor).

According to various embodiments, the electronic device 101 based on the increased value of the SRS maximum transmission power according to updated information of the path loss setting value for each antenna stored in the memory (eg, the memory 130 of FIG. 1 ). to transmit SRS. According to <Table 5>, according to various embodiments, the electronic device may amplify in consideration of the path loss so that the same power of 22 dBm is output from each antenna during SRS transmission. For example, the first SRS is output at 22 dBm in consideration of the path loss PL_0 from the amplifier 1010 , and since the path loss PL_0 is 0 dB, a signal of 22 dBm may be output through the first antenna 511 . The second SRS is output at 24 dBm in consideration of the path loss PL_1 from the amplifier 1010 , and since the path loss PL_1 is 2 dB, a signal of 22 dBm may be output through the second antenna 512 . The third SRS is output as 27 dBm in consideration of the path loss PL_2 from the amplifier 1010 , and since the path loss PL_2) is 5 dB, a signal of 22 dBm may be output through the third antenna 513 . The fourth SRS is output at 27 dBm in consideration of the updated path loss (PL_3) in the amplifier 1010, and the path loss (PL_3) is updated from 7 dB to 5 dB, but the actual path loss is applied by 7 dB to the fourth antenna (511) A signal of 20 dBm may be output through . As such, the power output through the fourth antenna 514 is different from the power output from the first antenna 511 , the second antenna 512 , and the third antenna 513 , but the SRS maximum transmission power The performance of the electronic device 101 may be improved by increasing the actually transmitted SRS transmission power according to the increase of .

According to various embodiments, the maximum SRS transmission power may be increased to 25 dBm by adjusting max (RF path loss) to 2 dB as shown in Table 7 below.

	Ant_Port 0 Ant_Port 0	Ant_Port 1 Ant_Port 1	Ant_Port 2 Ant_Port 2	Ant_Port 3 Ant_Port 3
최대 전송 전력 (P_{max_UE})(dBm)Maximum transmit power (P _{max_UE} ) (dBm)	2727	2727	2727	2727
경로 손실(dB)Path Loss (dB)	00	22	22	22
SRS 최대 전송 전력(P_{max_SRS})SRS maximum transmit power (P _{max_SRS} )	2525	2525	2525	2525
여유 전송 전력(dB)Redundant transmit power (dB)	22	00	00	00

Referring to <Table 7>, in order to adjust max (RF path loss) to 2 dB, the path loss set values of the third antenna and the fourth antenna may be updated from preset 5 dB and 7 dB to 2 dB, respectively. The updated path loss settings may be stored in a memory (eg, a memory within a communication processor).

According to various embodiments, the electronic device 101 may transmit the SRS based on the increased value of the maximum SRS transmission power according to updated information of the path loss set value for each antenna stored in the memory 130 . According to <Table 7>, according to various embodiments, the electronic device may amplify in consideration of the path loss so that the same power of 25 dBm is output from each antenna during SRS transmission. For example, the first SRS is output at 25 dBm in consideration of the path loss PL_0 from the amplifier 1010 , and since the path loss PL_0 is 0 dB, a signal of 25 dBm may be output through the first antenna 511 . The second SRS is output at 27 dBm in consideration of the path loss PL_1 from the amplifier 1010 , and since the path loss PL_1 is 2 dB, a signal of 25 dBm may be output through the second antenna 512 . The third SRS is output at 27 dBm in consideration of the updated path loss PL_2 in the amplifier 1010, and the path loss PL_2) is updated from 5 dB to 2 dB, but the actual path loss is applied by 5 dB to the third antenna 513 ) through which a signal of 22 dBm can be output. The fourth SRS is output at 27 dBm in consideration of the path loss PL_3 from the amplifier 1010, and the path loss PL_3 is updated from 7 dB to 2 dB, but the actual path loss is applied by 7 dB through the fourth antenna 511 A signal of 20 dBm can be output. As described above, the power output through the third antenna 513 and the fourth antenna 514 is different in magnitude from the power output from the first antenna 511 and the second antenna 512 , but the maximum SRS transmission power The performance of the electronic device 101 may be improved by increasing the actually transmitted SRS transmission power according to the increase of .

According to various embodiments, the maximum SRS transmission power may be increased to 27 dBm by adjusting max (RF path loss) to 0 dB as shown in Table 8 below.

	Ant_Port 0 Ant_Port 0	Ant_Port 1 Ant_Port 1	Ant_Port 2 Ant_Port 2	Ant_Port 3 Ant_Port 3
최대 전송 전력 (P_{max_UE})(dBm)Maximum transmit power (P _{max_UE} ) (dBm)	2727	2727	2727	2727
경로 손실(dB)Path Loss (dB)	00	00	00	00
SRS 최대 전송 전력(P_{max_SRS})SRS maximum transmit power (P _{max_SRS} )	2727	2727	2727	2727
여유 전송 전력(dB)Redundant transmit power (dB)	00	00	00	00

Referring to <Table 8>, in order to adjust max (RF path loss) to 0 dB, the path loss set values of the second antenna, the third antenna, and the fourth antenna are set to 0 dB from preset 2 dB, 5 dB, and 7 dB, respectively. can be updated. The updated path loss setting value may be stored in a memory (eg, the memory 130 of FIG. 1 or a memory in the communication processor).

According to various embodiments, the electronic device 101 may transmit the SRS based on the increased value of the maximum SRS transmission power according to updated information of the path loss setting value for each antenna stored in the memory. According to <Table 8>, according to various embodiments, the electronic device may amplify in consideration of the path loss so that the same power of 27 dBm is output from each antenna during SRS transmission. For example, the first SRS is output at 27 dBm in consideration of the path loss PL_0 from the amplifier 1010 , and since the path loss PL_0 is 0 dB, a signal of 27 dBm may be output through the first antenna 511 . The second SRS is output at 27 dBm in consideration of the updated path loss PL_1 in the amplifier 1010, and the path loss PL_1 is updated from 2 dB to 0 dB, but the actual path loss is applied by 2 dB to the second antenna 512 A signal of 25 dBm can be output through . The third SRS is output as 27 dBm in consideration of the updated path loss PL_2 in the amplifier 1010, and the path loss PL_2) is updated from 5 dB to 0 dB, but the actual path loss is applied by 5 dB to the third antenna 513 ) through which a signal of 22 dBm can be output. The fourth SRS is output at 27 dBm in consideration of the path loss PL_3 from the amplifier 1010, and the path loss PL_3 is updated from 7 dB to 0 dB, but the actual path loss is applied by 7 dB through the fourth antenna 511 A signal of 20 dBm can be output. As such, the power output through the first antenna 511 , the second antenna 512 , the third antenna 513 , and the fourth antenna 514 is different in size from each other, but it is difficult to increase the SRS maximum transmission power. Accordingly, the performance of the electronic device 101 may be improved by increasing the actually transmitted SRS transmission power.

According to various embodiments, when application of the changed SRS maximum transmit power is stopped and a preset path loss set value (default value) is applied, the set values stored in the memory may be reset to the initially set path loss set value.

According to various embodiments, the electronic device transmits the SRS based on the path loss setting value updated in operation 1170, and determines whether downlink performance is improved according to the newly applied path loss setting value. You can compare previous metrics. For example, the current metric may be a current downlink performance (throughput, T-put) (eg, data rate (Mbps)), and the previous metric is a previous downlink performance (throughput, T-put) (eg, data rate (Mbps)) ) can be

According to various embodiments, when compared with the previous result, whether or not the performance is improved may be determined by further considering not only the downlink performance but also the consumption current according to the increase in transmission power as shown in Equation 3 below.

In <Equation 3>, Current may mean a consumption current, and Tput may mean a transmission rate. Here, α and β may mean each weighting value or scaling value for consumption current (mA) and downlink performance (DL throughput (Mbps)) applied to the performance criterion, and the situation For example, when α has -1 reflecting the efficiency of consumption current, and β is set to 1, if current consumption is 300mA and T-put is 900Mbps at the previous point in time, the previous metric is It may be 600. According to various embodiments, when the current consumption current is 350mA and the T-put is 1300Mbps when measuring after increasing the SRS maximum transmission power, it can be seen that the Current Metric is 950, and the performance is improved. have.

According to various embodiments, when the previous metric is not greater than the current metric in operation 1180 (operation 1180 - NO), the electronic device 101 determines that there is no performance improvement and performs the procedure of operation 1120 or less. have. For example, if there is no performance improvement after the SRS maximum transmission power increase, but there is still room for an additional SRS power increase, the above-described SRS maximum transmission power increase procedure may be repeatedly performed.

According to various embodiments, when the previous metric is greater than the current metric in operation 1180 (operation 1180 - Yes), the electronic device 101 determines that the performance is improved, and sets the currently set SRS maximum transmission power in operation 1190 can keep According to various embodiments, when the SRS target power value is decreased along with the performance improvement due to the increase in the SRS maximum transmission power, the path loss setting value may be updated again to reduce the SRS maximum transmission power, contrary to the above-described method.

13 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure; Referring to FIG. 13 , according to various embodiments, the electronic device 101 (eg, the communication processor 260 of the electronic device) may control to transmit antenna-related information to the base station according to the SRS operation setting in operation 1310 . . According to various embodiments, when the electronic device includes one transmit antenna and four receive antennas, the antenna-related information includes information indicating that the electronic device supports one transmit antenna and four receive antennas. may include The antenna-related information may be transmitted by being included in the UE Capability Information message. The UE Capability Information message may include information related to the reception antenna of the electronic device 101 according to the contents of the UE Capability Inquiry message, such as 'supportedSRS-TxPortSwitch t1r4'. According to various embodiments, the electronic device may receive information related to a transmission time of a reference signal (eg, SRS) through each antenna from the base station. For example, the electronic device 101 may transmit a reference signal (eg, SRS) to each antenna at the transmission time of the reference signal in a state set to '1T4R'.

According to various embodiments, the electronic device 101 (eg, the communication processor 260 of the electronic device) may check whether the SRS target power exceeds the SRS maximum transmission power in operation 1320 . According to various embodiments, the SRS target power may be determined by Equation 2 above, and the SRS maximum transmission power is the path loss for each antenna in the maximum transmission power of the electronic device as described above with reference to FIG. 10 . It can be determined by considering the maximum value of .

According to various embodiments, if it is determined that the SRS target power does not exceed the SRS maximum transmission power (operation 1320 - NO), the electronic device 101 maintains the currently set SRS maximum transmission power in operation 1380 and each SRS SRS may be transmitted at the time of transmission.

According to various embodiments, if it is determined that the SRS target power exceeds the SRS maximum transmission power (operation 1320 - Yes), the electronic device 101 may check the difference between the SRS target power and the SRS maximum transmission power in operation 1330 have. As a result of the check, if the power difference between the SRS target power and the SRS maximum transmission power does not exceed a preset first threshold in operation 1340 (operation 1340 - NO), the electronic device 101 transmits the currently set SRS maximum transmission power in operation 1380 SRS may be transmitted at each SRS transmission time in a state in which power is maintained.

According to various embodiments, as a result of the check, if the power difference between the SRS target power and the SRS maximum transmission power exceeds a preset first threshold in operation 1340 (operation 1340 - Yes), the electronic device 101 performs the operation 1350 The maximum bandwidth of the electronic device may be adjusted. For example, in a situation in which the difference between the SRS target power and the SRS maximum transmission power is relatively large (eg, in a situation in which the first threshold value is exceeded), a performance gain obtainable by a method of increasing the transmission power of the electronic device may be limited. In this case, by reducing the SRS transmission bandwidth, it is possible to obtain an effect of increasing the margin of transmission power within the reduced band without increasing the transmission power of the electronic device.

14 is a diagram illustrating maximum bandwidth adjustment of a reference signal according to various embodiments of the present disclosure; Referring to FIG. 14 , the UE capa. of the electronic device 101 through the RRC message. The UL SRS transmission bandwidth can be adjusted by changing the UL (uplink) maximum transmission bandwidth information in the information and notifying the base station 520 . For example, as shown in FIG. 14 , the entire UL band is used for SRS transmission in the first period (T ₁ ) 1410 in which the SRS transmission power of the electronic device (eg, the electronic device 101 of FIG. 1 ) is limited. This can be inefficient in terms of performance as well as current consumption. According to various embodiments, the electronic device 101 may include a UE capa. By updating the information, the SRS transmission bandwidth can be reduced to compensate for the lack of SRS transmission power.

For example, the UE capa. A method of adjusting the UL maximum bandwidth by updating information may be implemented in various ways. For example, in the "OverheatingAssistance" field in the UE assistance information message defined in the standard document TS 38.331, a parameter for adjusting the UL maximum bandwidth (UL MaxBW) in the FR1 and FR2 bands is defined as shown in Table 9 below.

OverheatingAssistance ::= SEQUENCE {
…
reducedMaxBW-FR1 SEQUENCE {
reducedBW-FR1-DL mhz100,
reducedBW-FR1-UL mhz100
} OPTIONAL,
reducedMaxBW-FR2 SEQUENCE {
reducedBW-FR2-DL mhz100,
reducedBW-FR2-UL mhz100
} OPTIONAL,
…
}

Referring to <Table 9>, the shortage of SRS transmission power can be alleviated by limiting the “reducedBW-UL” of the FR1 and FR2 bands to a specific band in the entire band. For example, the electronic device 101 may transmit the UE assistance information message 1420 in which the UL maximum bandwidth (UL MaxBW) is adjusted in the “OverheatingAssistance” field to the base station 520 as shown in Table 9 above. The base station 520 checks the UL maximum bandwidth (UL MaxBW) through the "OverheatingAssistance" field included in the UE assistance information message 1420, and transmits and receives an RRC Reconfiguration message 1430 to and from the electronic device 520. You can adjust the UL maximum bandwidth of the device 101 . After the UL maximum bandwidth is adjusted, the electronic device 101 may compensate for the lack of SRS transmission power by reducing the SRS transmission bandwidth in the second period T ₂ 1440 as shown in FIG. 14 .

According to various embodiments, the electronic device may transmit the SRS for each antenna with power set based on the adjusted UL maximum bandwidth (UL MaxBW) in operation 1360 .

According to various embodiments, the electronic device transmits the SRS based on the adjusted UL maximum bandwidth in operation 1360, and compares the current metric with the previous metric to determine whether downlink performance is improved according to the newly applied UL maximum bandwidth. Metrics can be compared. As the method of comparing the current metric and the previous metric may be applied to the description of FIG. 11 , a detailed description thereof will be omitted.

According to various embodiments, when the previous metric is greater than the current metric in operation 1370 (operation 1370 - Yes), the electronic device 101 determines that performance is improved, and maintains the currently set UL maximum bandwidth in operation 1380 can

According to various embodiments, when the previous metric is not greater than the current metric in operation 1370 (operation 1370 - NO), the electronic device 101 may set to stop the SRS operation in operation 1390 . For example, when it is determined that it is appropriate to obtain DL CSI using a CSI (channel state information) report rather than maintaining the SRS operation setting in a situation in which SRS transmission power is insufficient, the SRS operation setting is set to “ notSupported”.

15 is a diagram illustrating a change in an operation setting of a reference signal according to various embodiments of the present disclosure; 15, TAU report transmission and UE capa. It is possible to stop the SRS operation setting by the update transmission and to perform CSI-based channel estimation. For example, as shown in FIG. 15 , the base station 520 performs downlink channel estimation and resource allocation based on SRS as in the method illustrated in FIG. 5A in a first period (T ₁ ) 1510 . allocation), it is possible to perform SRS-based link adaptation. When the electronic device 101 determines that it is suitable to acquire DL CSI using a CSI (channel state information) report rather than maintaining the SRS operation setting in a situation in which SRS transmission power is insufficient, the SRS operation is performed as described above. You can set it to stop.

According to various embodiments, a “srs-TxSwitch” parameter is defined in “BandCombinationList parameters” in TS 38.306, a standard document on UE radio access capability, which indicates whether the electronic device supports SRS transmission for the purpose of acquiring DL CSI. . According to various embodiments, by updating the "srs-TxSwitch" parameter in the UE capability information to "notSupported" and transmitting it to the base station, it may be induced to not perform the SRS operation. According to various embodiments, a method of updating UE capability information may use a tracking area update (TAU) procedure. According to various embodiments, the change of radio capability information of the electronic device may use the "normal and periodic tracking area updating procedure" defined in the standard document TS 24.301, and as described above, "srs-TxSwitch" in the "UE capability" information When " is changed to "notSupported" and a TAU request including "UE radio capability information update needed" IE (information element) is transmitted, "UE radio capability information" stored in a mobility management entity (MME) may be deleted.

Referring to FIG. 15 , the electronic device 101 may stop applying the SRS operation through “capability update” of the electronic device registered in the network. According to various embodiments, as described above, in order to change "UE radio capability", the electronic device 101 transmits the TAU REQUEST 1520 to the base station 520 including "UE radio capability information update needed" IE (information element). can be sent to The base station 1520 may stop applying the SRS operation through transmission and reception of a message 1530 for updating UE capability information with the electronic device 101 . For example, the electronic device 101 sets the “srs-TxSwitch” parameter related to SRS antenna switching to “notSupported” to set the UE capa. Information may be transmitted to the base station 1520, and the base station 520 may change the CSI configuration setting for terminating the SRS operation setting according to the changed capability. For example, as shown in FIG. 15 , the base station 520 transmits a CSI Report (eg, a channel quality indicator (CQI) included in the CSI Report) received from the electronic device 101 in the second interval (T ₂ ) 1540 and CSR-based link adaptation may be performed by performing resource allocation with reference to a rank indicator (RI).

16A and 16B are flowcharts illustrating a method of operating an electronic device according to various embodiments of the present disclosure; 16A and 16B , the above-described operations of FIG. 11 and the operations of FIG. 13 may be applied together. Hereinafter, in the description of FIGS. 16A and 16B, descriptions that are the same as those in FIGS. 11 and 13 will be omitted.

16A and 16B , according to various embodiments, the electronic device 101 (eg, the communication processor 260 of the electronic device) controls to transmit antenna-related information to the base station according to the SRS operation setting in operation 1602 . can do. According to various embodiments, when the electronic device includes one transmit antenna and four receive antennas, the antenna-related information includes information indicating that the electronic device supports one transmit antenna and four receive antennas. may include

According to various embodiments, the electronic device 101 (eg, the communication processor 260 of the electronic device) may determine whether the SRS target power exceeds the SRS maximum transmission power in operation 1604 . According to various embodiments, the SRS target power may be determined by Equation 2 above, and the SRS maximum transmission power is the path loss for each antenna in the maximum transmission power of the electronic device as described above with reference to FIG. 10 . It can be determined by considering the maximum value of .

According to various embodiments, if it is determined that the SRS target power does not exceed the SRS maximum transmission power (operation 1604-No), the electronic device 101 maintains the currently set SRS maximum transmission power in operation 1618 and each SRS SRS may be transmitted at the time of transmission.

According to various embodiments, if it is determined that the SRS target power exceeds the SRS maximum transmission power (operation 1604-Yes), the electronic device 101 may check the difference between the SRS target power and the SRS maximum transmission power in operation 1606 have. As a result of the check, if the power difference between the SRS target power and the SRS maximum transmission power is not equal to or less than a preset first threshold in operation 1608 (operation 1608 - NO), the electronic device 101 determines the electronic device in operation 1620 of FIG. 16B. You can adjust the maximum bandwidth. According to various embodiments, the electronic device 101 may transmit the SRS for each antenna with power set based on the adjusted maximum bandwidth in operation 1622 . Examples of

operations

1620 and 1622 will be omitted since they have been described in detail in the description of

operations

1350 and 1360 of FIG. 13 .

According to various embodiments, the electronic device transmits the SRS based on the adjusted UL maximum bandwidth in operation 1622, and compares the current metric with the previous metric to determine whether downlink performance is improved according to the newly applied UL maximum bandwidth. Metrics can be compared. As the method of comparing the current metric and the previous metric can be applied to the description of FIG. 11 , a detailed description thereof will be omitted.

According to various embodiments, when the previous metric is greater than the current metric in operation 1624 (operation 1624 - Yes), the electronic device 101 determines that performance is improved, and sets the currently set SRS maximum transmission power in operation 1618 can keep

According to various embodiments, when the previous metric is not greater than the current metric in operation 1624 (operation 1624 - NO), the electronic device 101 may change the SRS operation setting to “notSupported” in operation 1626 . For example, when it is determined that it is appropriate to obtain DL CSI using a CSI (channel state information) report rather than maintaining the SRS operation setting in a situation in which SRS transmission power is insufficient, the SRS operation may be set to stop.

According to various embodiments, as a result of the check, if the power difference between the SRS target power and the SRS maximum transmission power in operation 1608 is less than or equal to a preset first threshold value (operation 1608 - Yes), the electronic device 101 performs the current operation in operation 1610 It can be set to increase the set SRS maximum transmit power. In operation 1612 , the electronic device 101 may update the path loss setting value for each antenna to a value changed from the previous value as the SRS maximum transmission power is set to increase. In operation 1614 , the electronic device 101 may transmit the SRS for each antenna with power set based on the updated path loss setting value.

According to various embodiments, the electronic device transmits the SRS based on the path loss setting value updated in operation 1616, and determines whether downlink performance is improved according to the newly applied path loss setting value. You can compare previous metrics.

According to various embodiments, when the previous metric is not greater than the current metric in operation 1616 (operation 1616 - NO), the electronic device 101 determines that there is no performance improvement and performs the procedure of operation 1604 or less. have. For example, if there is no performance improvement after the SRS maximum transmission power increase, but there is still room for an additional SRS power increase, the above-described SRS maximum transmission power increase procedure may be repeatedly performed.

According to various embodiments, when the previous metric is greater than the current metric in operation 1616 (operation 1616 - Yes), the electronic device 101 determines that performance is improved, and sets the currently set SRS maximum transmission power in operation 1618 can keep According to various embodiments, when the SRS target power value is decreased along with the performance improvement due to the increase in the SRS maximum transmission power, the path loss setting value may be updated again to reduce the SRS maximum transmission power, contrary to the above-described method.

17 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure; According to various embodiments, the base station that has received the SRS from the electronic device (eg, the electronic device 101 of FIG. 1 ) may allocate DL resources by estimating UL channel information and determining a DL channel state based thereon. According to various embodiments, the base station may determine the DL channel state and determine a precoding matrix that the electronic device transmits in a direction to reduce interference when receiving DL data. According to various embodiments, the electronic device transmits UL channel information by reflecting the DL interference effect experienced by the electronic device, so that the base station may acquire DL CSI considering the DL channel interference effect.

According to various embodiments, the electronic device may use an IW (interference whitening) matrix that processes interference as additive white gaussian noise (AWGN) as an SRS precoding matrix in order to reduce the influence of interference when receiving DL data. The electronic device may apply the precoding matrix to the SRS to enable beamforming in a direction with less DL interference, and the base station may determine the resource allocation and the DL precoding matrix in consideration of interference control through the changed channel.

Referring to FIG. 17 , according to various embodiments, the electronic device 101 (eg, the communication processor 260 of the electronic device) may control to transmit antenna-related information to the base station according to the SRS operation setting in operation 1710. . According to various embodiments, when the electronic device includes one transmit antenna and four receive antennas, the antenna-related information includes information indicating that the electronic device supports one transmit antenna and four receive antennas. may include

According to various embodiments, the electronic device 101 (eg, the communication processor 260 of the electronic device) may identify an expected performance gain based on channel information in operation 1720 . For example, in operation 1730, the electronic device performs DL resource allocation by the base station when the actually received DL throughput (eg, data rate) is lower than the performance gain estimate calculated based on channel information measured when DL data is received in operation 1730. It is determined that it is not suitable, and as described above, the SRS may be precoded into the IW matrix in operation 1740 . The electronic device may transmit the IW precoded SRS in operation 1750 .

According to various embodiments, the electronic device may apply an IW (interference whitening) matrix for processing interference with AWGN when transmitting SRS as a method for reducing the influence of interference upon reception of DL data, wherein the IW matrix is It can be expressed as Equation 4> and <Equation 5>.

In Equation 4, y _DL is a signal received by the electronic device, H _DL is a DL channel matrix, and n is noise. In Equation 5, R _IW is an IW matrix used for DL reception. According to various embodiments, since the channel state finally experienced by the electronic device is a channel to which IW is applied, the base station may determine the channel state in advance and transmit it by applying the IW matrix to the SRS so that it can be used for DL data transmission. According to various embodiments, the SRS ( x ' _SRS ) to which the IW matrix (R _IW ) is applied may be expressed as in Equation 6 below.

In Equation 6, α is a power scaling factor that is adjusted in consideration of DL reception strength and UL transmission strength, and (R _IW ) ^H denotes a Hermitian-calculated matrix of R _IW . According to various embodiments, the x _SRS is a value to which a precoding matrix P is applied to SRS data s to be transmitted, and may be expressed as in Equation 7 below.

According to various embodiments, in the electronic device, srs-TxSwitch may be set to 2T2R. In the 2T2R configuration, the base station may set one SRS resource and simultaneously transmit the same SRS from two antennas. In this case, when the IW matrix is applied to the SRS resource, the IW matrix (R _SRS ) can be expressed as shown in Equation 8 below, respectively.

The transmission signal and the reception signal to which the IW matrix of <Equation 8> is applied may be expressed by <Equation 9> and <Equation 10>, respectively.

According to various embodiments, the base station is capable of UL channel estimation in consideration of DL interference control from the received SRS. The above method can be applied to all cases where the srs-TxSwitch configuration is {1T-1R, 2T-2R, 4T-4R}.

According to various embodiments, when the srs-TxSwitch of the electronic device is set to 1T2R, the base station may set two SRS resources for SRS antenna switching. For example, when there are two antennas usable in the electronic device and using them, the base station can estimate the entire channel information including the DL interference effect. When the transmission signal and the reception signal to which the SRS precoding is applied are expressed by equations, they can be expressed as in <Equation 11> and <Equation 12>, respectively.

According to various embodiments, as described above, the electronic device may perform UL channel estimation in which interference control effects for two antennas are reflected from two SRS resources. The above method can also be applied to a case where the srs-TxSwitch configuration is {1T2R, 1T4R, 2T4R}.

The electronic device according to any one of various embodiments includes a communication processor, at least one radio frequency integrated circuit (RFIC) connected to the communication processor, and each of the at least one RFIC and at least one radio frequency integrated circuit (RFFE). front-end) including a plurality of antennas connected through a circuit, wherein the communication processor transmits a reference signal with power set based on a path loss setting value for a transmission path corresponding to each antenna of the plurality of antennas, When the target power of the reference signal is greater than the maximum transmission power set for the reference signal, a difference between the target power of the reference signal and the set maximum transmission power is checked, and the target power of the reference signal and the set maximum transmission power If the difference is equal to or less than a set threshold, it is possible to control to adjust a path loss setting value for a transmission path corresponding to at least one antenna among the plurality of antennas.

According to various embodiments, the operation of FIG. 17 may be applied in combination with the operation of FIG. 11 , 13 or 16 . For example, if the actually received DL throughput (eg, data rate) is greater than the performance gain estimate calculated based on channel information measured when DL data is received in operation 1730 described above, operation 1404 of FIG. 16A is performed. Various embodiments capable of increasing the SRS transmission power by proceeding may be applied.

The electronic device according to any one of various embodiments may include a communication processor, at least one radio frequency integrated circuit (RFIC) connected to the communication processor, and at least one configured to be connected to the at least one RFIC to process a transmission signal one radio frequency front-end (RFFE) circuit, comprising a plurality of antennas connected through the at least one RFFE circuit, wherein the communication processor is configured to set a path loss for a transmission path corresponding to each antenna of the plurality of antennas Transmitting a reference signal with power set based on the value, and when the target power of the reference signal is greater than the maximum transmission power set for the reference signal, check the difference between the target power of the reference signal and the set maximum transmission power, , when the difference between the target power of the reference signal and the set maximum transmission power is equal to or less than a set threshold, it is possible to control to adjust a path loss setting value for a transmission path corresponding to at least one antenna among the plurality of antennas.

According to various embodiments, the reference signal may include a sounding reference signal (SRS) used for multi-antenna signal processing through uplink channel state measurement.

According to various embodiments, the communication processor may control to transmit antenna switching capability related information to the base station.

According to various embodiments, when a difference between the target power of the reference signal and the set maximum transmit power is equal to or less than a set threshold, the communication processor may control to increase the set maximum transmit power.

According to various embodiments, when a difference between the target power of the reference signal and the set maximum transmission power is equal to or less than a set threshold, the communication processor may be configured to lose a path for a transmission path corresponding to at least one of the plurality of antennas. It can be controlled to adjust the setting value downward.

According to various embodiments, when a difference between the target power of the reference signal and the set maximum transmission power exceeds a set threshold, the communication processor may control the uplink maximum bandwidth of the electronic device to be down-regulated.

According to various embodiments, when a difference between the target power of the reference signal and the set maximum transmission power exceeds a set threshold, the communication processor may set an operation setting related to the reference signal to not supported and transmit it to the base station.

According to various embodiments, the communication processor precodes the reference signal based on the downlink signal when the data rate measured from the received downlink signal is lower than the expected data rate confirmed based on downlink channel information, , it is possible to control to transmit the precoded reference signal at the time of transmission of the reference signal.

The electronic device according to any one of various embodiments may include a communication processor, at least one radio frequency integrated circuit (RFIC) connected to the communication processor, and at least one configured to be connected to the at least one RFIC to process a transmission signal one radio frequency front-end (RFFE) circuit, and a plurality of antennas connected through the at least one RFFE circuit, wherein the communication processor is configured to receive a downlink signal higher than an expected data rate determined based on downlink channel information. When the measured data rate is lower, it is possible to precode the reference signal based on the downlink signal, and control to transmit the precoded reference signal at the time of transmission of the reference signal.

The method according to any one of various embodiments includes a communication processor, at least one radio frequency integrated circuit (RFIC) connected to the communication processor, and at least one connected to the at least one RFIC and configured to process a transmission signal A method for transmitting a reference signal in an electronic device including a radio frequency front-end (RFFE) circuit of a plurality of antennas connected through the at least one RFFE circuit, the method comprising: Transmitting a reference signal with power set based on a path loss setting value for a transmission path, when the target power of the reference signal is greater than the maximum transmission power set for the reference signal, the target power of the reference signal and the set checking the difference between the maximum transmission powers, and if the difference between the target power of the reference signal and the set maximum transmission power is less than or equal to a set threshold, path loss for a transmission path corresponding to at least one of the plurality of antennas It may include an operation of adjusting the set value.

According to various embodiments, the method may include increasing the set maximum transmit power when a difference between the target power of the reference signal and the set maximum transmit power is equal to or less than a set threshold.

According to various embodiments, the method includes setting a path loss for a transmission path corresponding to at least one of the plurality of antennas when a difference between the target power of the reference signal and the set maximum transmission power is equal to or less than a set threshold value. It may include an operation for adjusting the value downward.

According to various embodiments, the method may include down-adjusting the uplink maximum bandwidth of the electronic device when a difference between the target power of the reference signal and the set maximum transmission power exceeds a set threshold.

According to various embodiments, the method includes, when a difference between the target power of the reference signal and the set maximum transmission power exceeds a set threshold, setting an operation setting related to the reference signal to not supported and transmitting to the base station can do.

According to various embodiments, the method includes an operation of precoding the reference signal based on a downlink signal when a data rate measured from a received downlink signal is lower than an expected data rate confirmed based on downlink channel information , and transmitting the precoded reference signal at the time of transmission of the reference signal.

The method according to any one of various embodiments includes a communication processor, at least one radio frequency integrated circuit (RFIC) connected to the communication processor, and at least one connected to the at least one RFIC and configured to process a transmission signal In a method for transmitting a reference signal in an electronic device including a radio frequency front-end (RFFE) circuit of the at least one RFFE circuit, and a plurality of antennas connected through the at least one RFFE circuit, a prediction confirmed based on downlink channel information When the data rate measured from the received downlink signal is lower than the data rate, the operation of precoding the reference signal based on the downlink signal, and the operation of transmitting the precoded reference signal at the transmission time of the reference signal may include

The electronic device according to various embodiments disclosed in this document may have various types of devices. The electronic device may include, for example, a computer device, a portable communication device (eg, a smartphone), a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device. The electronic device according to the embodiment of the present document is not limited to the above-described devices.

The various embodiments of this document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, but it should be understood to include various modifications, equivalents, or substitutions of the embodiments. In connection with the description of the drawings, like reference numerals may be used for similar or related components. The singular form of the noun corresponding to the item may include one or more of the item, unless the relevant context clearly dictates otherwise. As used herein, “A or B”, “at least one of A and B”, “at least one of A or B,” “A, B or C,” “at least one of A, B and C,” and “A , B, or C" each may include any one of the items listed together in the corresponding one of the phrases, or all possible combinations thereof. Terms such as “first”, “second”, or “first” or “second” may simply be used to distinguish the component from other components in question, and may refer to components in other aspects (e.g., importance or order) is not limited. that one (eg first) component is “coupled” or “connected” to another (eg, second) component with or without the terms “functionally” or “communicatively” When referenced, it means that one component can be connected to the other component directly (eg by wire), wirelessly, or through a third component.

As used herein, the term “module” may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as, for example, logic, logic block, component, or circuit. A module may be an integrally formed part or a minimum unit or a part of the part that performs one or more functions. For example, according to an embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

Various embodiments of the present document include software (eg, one or more instructions stored in a storage medium (eg, internal memory or external memory) readable by a machine (eg, a master device or a task performing device)) For example, it can be implemented as a program). For example, a processor of a device (eg, a master device or a task performing device) may call at least one of one or more instructions stored from a storage medium and execute it. This makes it possible for the device to be operated to perform at least one function according to the called at least one command. 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. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain a signal (eg, electromagnetic wave), and this term is used in cases where data is semi-permanently stored in the storage medium and It does not distinguish between temporary storage cases.

According to one embodiment, the method according to various embodiments disclosed in this document may be provided as included in a computer program product. Computer program products may be traded between sellers and buyers as commodities. The computer program product is distributed in the form of a device-readable storage medium (eg compact disc read only memory (CD-ROM)), or through an application store (eg Play Store™) or on two user devices (eg, It can be distributed (eg downloaded or uploaded) directly or online between smartphones (eg: smartphones). In the case of online distribution, at least a part of the computer program product may be temporarily stored or temporarily created in a machine-readable storage medium such as a memory of a server of a manufacturer, a server of an application store, or a relay server.

According to various embodiments, each component (eg, a module or a program) of the above-described components may include a singular or a plurality of entities. According to various embodiments, one or more components or operations among the above-described corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg, a module or a program) may be integrated into one component. In this case, the integrated component may perform one or more functions of each component of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. . According to various embodiments, operations performed by a module, program, or other component are executed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations are executed in a different order, or omitted. or one or more other operations may be added.

Claims

In an electronic device,

communication processor;

at least one radio frequency integrated circuit (RFIC) coupled to the communication processor; and

A plurality of antennas connected through the at least one RFIC and at least one radio frequency front-end (RFFE) circuit, respectively;

The communication processor,

Transmitting a reference signal with power set based on a path loss setting value for a transmission path corresponding to each antenna of the plurality of antennas,

If the target power of the reference signal is greater than the maximum transmission power set for the reference signal, check a difference between the target power of the reference signal and the set maximum transmission power,

When a difference between the target power of the reference signal and the set maximum transmission power is equal to or less than a set threshold, controlling to adjust a path loss setting value for a transmission path corresponding to at least one antenna among the plurality of antennas.
According to claim 1, wherein the reference signal,

An electronic device comprising a sounding reference signal (SRS) used for multi-antenna signal processing through uplink channel state measurement.
According to claim 1, wherein the communication processor,

An electronic device that controls to transmit antenna switching capability related information to a base station.
According to claim 1, wherein the communication processor,

When a difference between the target power of the reference signal and the set maximum transmit power is equal to or less than a set threshold, controlling to increase the set maximum transmit power.
According to claim 1, wherein the communication processor,

When the difference between the target power of the reference signal and the set maximum transmission power is equal to or less than a set threshold, controlling to downgrade a path loss setting value for a transmission path corresponding to at least one antenna among the plurality of antennas, .
According to claim 1, wherein the communication processor,

When a difference between the target power of the reference signal and the set maximum transmission power exceeds a set threshold, controlling the uplink maximum bandwidth of the electronic device to be down-regulated.
According to claim 1, wherein the communication processor,

When a difference between the target power of the reference signal and the set maximum transmission power exceeds a set threshold, an operation setting related to the reference signal is set as unsupported and transmitted to the base station.
According to claim 1, wherein the communication processor,

If the data rate measured from the received downlink signal is lower than the expected data rate confirmed based on downlink channel information, precoding the reference signal based on the downlink signal;

Controlling to transmit the precoded reference signal at the time of transmission of the reference signal, the electronic device.
In an electronic device,

communication processor;

at least one radio frequency integrated circuit (RFIC) coupled to the communication processor;

at least one radio frequency front-end (RFFE) circuit coupled to the at least one RFIC and configured to process a transmission signal;

A plurality of antennas connected through the at least one RFFE circuit,

The communication processor,

If the data rate measured from the received downlink signal is lower than the expected data rate confirmed based on downlink channel information, precoding the reference signal based on the downlink signal;

Controlling to transmit the precoded reference signal at the time of transmission of the reference signal, the electronic device.
The method of claim 9, wherein the reference signal,

An electronic device comprising a sounding reference signal (SRS) used for multi-antenna signal processing through uplink channel state measurement.
a communication processor, at least one radio frequency integrated circuit (RFIC) coupled to the communication processor, at least one radio frequency front-end (RFFE) circuit coupled to the at least one RFIC and configured to process a transmission signal; A method for transmitting a reference signal in an electronic device including a plurality of antennas connected through the at least one RFFE circuit, the method comprising:

transmitting a reference signal with power set based on a path loss setting value for a transmission path corresponding to each antenna of the plurality of antennas;

when the target power of the reference signal is greater than the maximum transmission power set for the reference signal, checking a difference between the target power of the reference signal and the set maximum transmission power; and

When a difference between the target power of the reference signal and the set maximum transmission power is equal to or less than a set threshold, adjusting a path loss setting value for a transmission path corresponding to at least one antenna among the plurality of antennas; How the device transmits a reference signal.
The method of claim 11, wherein the reference signal,

A method of transmitting a reference signal in an electronic device, including a sounding reference signal (SRS) used for multi-antenna signal processing through uplink channel state measurement.
12. The method of claim 11, wherein the method comprises:

The method of transmitting a reference signal in an electronic device, further comprising transmitting antenna switching capability related information to a base station.
12. The method of claim 11, wherein the method comprises:

and adjusting the set maximum transmit power upward when a difference between the target power of the reference signal and the set maximum transmit power is less than or equal to a set threshold.
12. The method of claim 11, wherein the method comprises:

When a difference between the target power of the reference signal and the set maximum transmission power is less than or equal to a set threshold, down-adjusting a path loss setting value for a transmission path corresponding to at least one antenna among the plurality of antennas, A method for transmitting a reference signal in an electronic device.