Method for GNSS positioning and electronic device for perfrming the same

Abstract

A method for GNSS positioning and an electronic device for performing said method are disclosed. A method for GNSS positioning according to one embodiment includes an operation of monitoring whether a failure in GNSS positioning has occurred; an operation of determining whether the output frequency of a first phase-locked loop (PLL) used for demodulating a GNSS signal received from a satellite for GNSS positioning is stable when a failure in GNSS positioning is detected; and an operation of changing the frequency used for demodulating the GNSS signal to the output frequency of a second PLL or the fundamental frequency input to the first PLL and the second PLL when the output frequency of the first PLL is unstable.

Description

Technology Field

[0001] Various embodiments of the present invention relate to GNSS (global navigation satellite system) positioning technology of an electronic device. Background Technology

[0002] The configuration for GNSS positioning consists of a GNSS satellite constellation that transmits signals, a receiving antenna for receiving signals from a smart device, and a processor that processes the received signals.

[0003] GNSS signals can be transmitted and received using the L band, which is a communication band between 1 GHz and 2 GHz. For example, in the L1 band, GPS uses 1575.42 MHz, GLONASS uses 1602 MHz, Beidou uses 1561.098 MHz, and Galileo uses 1575.42 MHz; in the L2 band, GPS uses 1227.60 MHz; and in the L5 band, GPS and Galileo use 1176.45 MHz, and GLONASS and Beidou can use 1207.14 MHz.

[0004] Crystal oscillator components such as XOs or TCXOs are used to demodulate GNSS satellite signals. RF systems including GNSS include a phase-locked loop (PLL) to use frequencies stably. The problem to be solved

[0005] As components for 5G communication are added to electronic devices capable of performing GNSS positioning, such as smartphones and navigation systems, components for GNSS positioning and components for 5G communication may be placed adjacent to each other. When GNSS-related components and components for 5G communication are placed adjacent to each other, clock drift may occur in which the output frequency of the PLL is skewed due to coupling noise generated between the 5G antenna and the GNSS-related components during 5G communication.

[0006] A method for GNSS positioning according to one embodiment and an electronic device performing said method can resolve GNSS positioning problems caused by clock drift. means of solving the problem

[0007] A method for GNSS positioning according to one embodiment may include: an operation of monitoring whether a failure occurs in the GNSS positioning; an operation of determining whether the output frequency of a first PLL (phase locked loop) used for demodulating a GNSS signal received from a satellite for the GNSS positioning is stable when the failure of the GNSS positioning is detected; and an operation of changing the frequency used for demodulating the GNSS signal to the output frequency of a second PLL or the fundamental frequency input to the first PLL and the second PLL when the output frequency of the first PLL is unstable.

[0008] An electronic device according to one embodiment may include a processor, a GNSS antenna for receiving a GNSS signal from a satellite for GNSS positioning, a GNSS (global navigation satellite system) receiver for demodulating the GNSS signal, an RF transceiver, a first PLL (phase locked loop) for providing a frequency for operating the GNSS receiver and a second PLL for providing a frequency for operating the RF transceiver, a transceiver communicating with the processor, and a 5G module including an antenna for 5G (generation) communication and communicating with the RF transceiver. The processor monitors for the occurrence of a failure in the GNSS positioning during the 5G communication, determines whether the output frequency of the first PLL used for demodulating the GNSS signal is stable, and if the output frequency of the first PLL is unstable, can change the frequency used for demodulating the GNSS signal to the output frequency of the second PLL or the fundamental frequency input to the first PLL and the second PLL. Effects of the invention

[0009] A method for GNSS positioning according to one embodiment and an electronic device performing the method can quickly resolve GNSS positioning problems by using a frequency of another stable PLL or a frequency prior to the PLL input, without using the frequency of a PLL affected by a 5G antenna or component when 5G (generation) communication and GNSS positioning are used simultaneously. Brief explanation of the drawing

[0010] FIG. 1 is a block diagram of an electronic device in a network environment according to various embodiments. FIG. 2 is a diagram illustrating an overview of a method for GNSS positioning according to one embodiment and an electronic device for performing said method. FIG. 3 is a block diagram illustrating the configuration of a device for performing a method for GNSS positioning according to one embodiment. FIG. 4 is a diagram illustrating a 5G communication network coverage map that can be used in a method for GNSS positioning according to one embodiment and an electronic device performing the method. FIG. 5 is a flowchart illustrating a method for GNSS positioning according to one embodiment. FIG. 6 is a flowchart illustrating a method for GNSS positioning according to another embodiment. FIG. 7 is a flowchart illustrating a method for GNSS positioning using 5G communication network coverage map data according to one embodiment. Specific details for implementing the invention

[0011] Hereinafter, embodiments will be described in detail with reference to the attached drawings. In the description with reference to the attached drawings, identical components are given the same reference numeral regardless of the drawing number, and redundant descriptions thereof will be omitted.

[0012] FIG. 1 is a block diagram of an electronic device (101) in a network environment (100) according to various embodiments. Referring to FIG. 1, in the network environment (100), the electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communication network) or may communicate with at least one of an electronic device (104) or a server (108) through a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) through a server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), 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 antenna module (197). In some embodiments, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0013] The processor (120) can control at least one other component (e.g., hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., program (140)), for example, and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., sensor module (176) or communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., central processing unit or application processor) or an auxiliary processor (123) that can operate independently or together with it (e.g., graphics processing unit, neural processing unit (NPU), image signal processor, sensor hub processor, or communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use lower power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0014] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or through a separate server (e.g., server (108)). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0015] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0016] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0017] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0018] The sound output module (155) can 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 may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0019] The display module (160) can visually provide information to an external (e.g., user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0020] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (101).

[0021] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0022] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0023] The connection terminal (178) may include a connector through which the electronic device (101) can be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0024] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0025] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0026] The power management module (188) can manage the power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least part of a power management integrated circuit (PMIC).

[0027] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0028] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (104) through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0029] The wireless communication module (192) can support 5G networks and next-generation communication technologies following 4G (generation) networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), external electronic device (e.g., electronic device (104)), or network system (e.g., second network (199)). According to one embodiment, the wireless communication module (192) can support a Peak data rate (e.g., 20 Gbps or more) for realizing eMBB, loss coverage (e.g., 164 dB or less) for realizing mMTC, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for realizing URLLC.

[0030] An antenna module (197) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (197) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0031] According to various embodiments, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0032] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0033] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through a server (108) connected to a second network (199). Each of the external electronic devices (102, or 104) may be the same or different type of device as the electronic device (101). According to one embodiment, all or part of the operations performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104, or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services 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. The server (108) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within a second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0034] FIG. 2 is a diagram illustrating an overview of a method for GNSS positioning according to one embodiment and an electronic device for performing said method.

[0035] Referring to FIG. 2, a navigation screen (200) displayed on a display (e.g., a display module (160)) of an electronic device (e.g., the electronic device (101) of FIG. 1) is shown. In one embodiment, the electronic device may include a GNSS positioning device for GNSS positioning (e.g., the GNSS positioning device (300) of FIG. 3).

[0036] GNSS (Global Navigation Satellite System) is a global positioning information service system. A GNSS positioning device can perform GNSS positioning by using GNSS to determine the 3D position of the GNSS positioning device in real time. A GNSS positioning device on the ground can receive GNSS signals, which are radio waves transmitted from multiple satellites, for GNSS positioning. GNSS signals may include satellite navigation information (e.g., orbit information (ephemeris and almanac)) indicating the satellite's orbit. A GNSS positioning device can determine the 3D position of the GNSS positioning device in real time using the trilateration method by measuring the satellite's orbit information and the arrival time of the received GNSS signal.

[0037] The navigation screen (200) of FIG. 2 may include a travel path (210) of a GNSS positioning device, the current location (205) of a GNSS positioning device measured through GNSS positioning of the GNSS positioning device, and information (215) about an RF communication method (e.g., 3G (generation), 4G and / or 5G) used for data communication.

[0038] The GNSS positioning device includes a GNSS antenna that receives GNSS signals for positioning, a GNSS front-end module that transmits GNSS signals to a GNSS receiver, and a GNSS receiver. For 5G communication, it may include a 5G communication module and an RF transceiver. The GNSS positioning device may include phase-locked loops (PLLs) that provide frequencies for the operation of the GNSS receiver and the RF transceiver. The specific configuration of the GNSS positioning device will be described in detail with reference to FIG. 3.

[0039] For GNSS positioning, the GNSS signal received from the satellite through the GNSS antenna must be demodulated by the GNSS receiver. The GNSS receiver receives a stable frequency from the PLL and can demodulate the GNSS signal using the frequency provided by the PLL.

[0040] Millimeter waves (mmWave) used for 5G communication have a frequency band of 30 to 300 GHz with wavelengths in the millimeter range and possess directional characteristics. Due to these directional characteristics, beamforming can be performed through array antennas during 5G communication. A GNSS positioning device may include two or more 5G communication modules to ensure omnidirectional radiation characteristics. As 5G modules are added to the GNSS positioning device, GNSS-related components (e.g., GNSS antenna, GNSS front-end module, GNSS receiver, and PLL) and 5G modules may be placed adjacent to each other. When GNSS-related components and 5G modules are placed adjacently, clock drift may occur, causing the output frequency of the PLL to shift due to coupling noise generated between the 5G antenna and the GNSS-related components during 5G communication.

[0041] If clock drift occurs at the output frequency of the PLL, which is the frequency used for demodulating GNSS signals, the demodulation of GNSS signals at the GNSS receiver may not be performed smoothly. If a problem occurs during the demodulation of GNSS signals, the current position of the GNSS positioning device as a result of GNSS positioning may not be correctly acquired, which may result in position deviation or failure to acquire the position.

[0042] In FIG. 2, 5G communication of the GNSS positioning device is initiated, and due to coupling noise between the 5G antenna and the GNSS-related components, clock drift may occur in the output frequency of the PLL, which is the frequency for GNSS signal demodulation. Due to the clock drift, the GNSS positioning device may not correctly acquire the current position (205) of the electronic device moving on the path (210) and may be indicated as having deviated from the path (210).

[0043] A GNSS positioning device according to one embodiment can determine whether the output frequencies of the PLLs are stable when it fails to acquire the correct position of an electronic device, and can change the frequency used for demodulating the GNSS signal to the output frequency of a PLL that is less affected by the 5G communication module or to the fundamental frequency input to the PLL. By doing so, the GNSS positioning device can minimize the occurrence of GNSS positioning failures when GNSS performance degrades due to the initiation of 5G communication. The configuration of the GNSS positioning device is described below in FIG. 3.

[0044] FIG. 3 is a block diagram illustrating the configuration of a device for performing a method for GNSS positioning according to one embodiment.

[0045] A GNSS positioning device (300) according to one embodiment may include an oscillator (340) that provides a frequency for the operation of a transceiver (375), a transceiver (375), a processor (370) (e.g., processor (120)) that generates data for communication, communicates with the transceiver (375), and controls the transceiver (375), a GNSS antenna (310) that receives a GNSS signal for GNSS positioning from a satellite, a GNSS front-end (305), a 5G module (315), a 4G antenna (320), a 3G antenna (325), a 5G sub 6 antenna (330), and an RF front-end (335).

[0046] The transceiver (375) may include a buffer (345) that receives a frequency generated from an oscillator (340) and transmits a fundamental frequency to each PLL, at least one PLL (e.g., a first PLL (350), a second PLL (355)) that provides a frequency for the operation of a GNSS receiver (360) that demodulates a GNSS signal and an RF transceiver (365), and a GNSS receiver (360) that demodulates a GNSS signal and an RF transceiver (365).

[0047] An oscillator (340), a transceiver (375), a GNSS front-end (305), a 5G module (315), and an RF front-end (335) may be included in the wireless communication module (192) of the electronic device (101) of FIG. 1. A GNSS antenna (310) and RF antennas (e.g., a 4G antenna (320), a 3G antenna (325), and a 5G sub-6 antenna (330)) may be included in the antenna module (197) of the electronic device (101) of FIG. 1.

[0048] The GNSS positioning device (300) can receive GNSS signals from a satellite through a GNSS antenna (310) to obtain data for GNSS positioning. The GNSS antenna (310) can have a communication band of 1.1 to 1.6 GHz and can receive L1, L2, and L5 signals for each satellite group (e.g., GPS, GLONASS, BEIDOU, GALILEO).

[0049] The GNSS signal may include navigation information of the satellite (e.g., orbit information (ephemeris and almanac) indicating the orbit of the satellite). The GNSS signal may be transmitted from the GNSS antenna (310) to the GNSS receiver (360) through the GNSS front-end (305). The GNSS front-end (305) may include an impedance matching circuit, an amplifier that amplifies the received signal, and a filter that removes unnecessary frequency components. The GNSS front-end (305) may receive an enable signal from the GNSS receiver (360) for the operation of the amplifier.

[0050] The GNSS receiver (360) can demodulate the GNSS signal for GNSS positioning. The GNSS receiver (360) can obtain a pseudo-range between the satellite and the GNSS positioning device (300) through satellite acquisition and transmit navigation information to the processor (370).

[0051] The GNSS positioning device (300) may include at least one 5G module (315) for 5G communication using millimeter waves. The 5G module (315) may transmit and receive 5G NR (new radio) millimeter wave signals. The 5G module (315) may include a front end that includes an amplifier and a filter and performs impedance matching, an array antenna for transmitting and receiving 5G signals, a phase shifter for beam forming, and an up / down converter that can raise or lower the RF frequency. The 5G module (315) may be integrated and modularized because, due to the high frequency characteristics of millimeter waves, making the transmission line long on a printed circuit board (PCB) results in high transmission loss and makes impedance matching difficult.

[0052] In FIG. 3, the GNSS positioning device (300) is shown as including one 5G module (315), but since millimeter waves have directional characteristics, the GNSS positioning device (300) may include two or more 5G modules (315) to obtain omnidirectional characteristics.

[0053] The GNSS positioning device (300) may further include an RF front-end (335) comprising a 4G front-end for 4G communication, a 3G front-end for 3G communication, and a 5G sub-6 front-end for 5G sub-6 communication. The GNSS positioning device (300) may include a 4G antenna (320) for receiving a 4G RF signal, a 3G antenna (325) for receiving a 3G RF signal, and a 5G sub-6 antenna (330) for receiving a 5G sub-6 signal. The frequency of 5G sub-6 communication is 6 GHz or lower, and the circuit for 5G sub-6 communication may be configured to include the antenna (330) and the front-end (335), unlike millimeter wave. The RF front-end (335) may include a noise filter, an amplifier, a switching circuit for frequency change, and a circuit for impedance matching. The RF front-end (335) can transmit RF signals received through the 4G antenna (320), 3G antenna (325), and 5G sub-6 antenna (330) to the RF transceiver (365), or receive RF signals from the RF transceiver (365) for transmitting RF signals through the 4G antenna (320), 3G antenna (325), and 5G sub-6 antenna (330). The RF front-end (335) can be controlled by the RF transceiver (365).

[0054] The RF transceiver (365) may include a digital-to-analog converter (DAC) that modulates the analog signal to 5G, 4G, and 3G communication standards to transmit digital data generated from the processor (370), and an analog-to-digital converter (ADC) that demodulates the analog signal received through the antenna (320, 325, 330) or the array antenna of the 5G module (315) into a digital signal. The RF transceiver (365) may transmit the data contained in the demodulated digital signal to the processor (370).

[0055] The GNSS positioning device (300) may include a transceiver (375) comprising a GNSS receiver (360) and an RF transceiver (365). The GNSS positioning device (300) may include an oscillator (340) to provide a frequency for the operation of the transceiver (375). The oscillator (340) may supply a frequency to create a frequency band necessary for demodulating and modulating a signal. The oscillator (340) may be, for example, a crystal oscillator (XO) or a temperature-controlled crystal oscillator (TCXO). However, it is not limited thereto, and various types of oscillators (340) may be included.

[0056] The transceiver (375) may include at least one PLL to provide a stable frequency to the GNSS receiver (360) and RF transceiver (365) based on the frequency provided by the oscillator (340). The PLL can control the output signal by comparing the phase difference between the input signal and the output signal. The PLL can adjust the frequency of the output signal according to the input signal. In the case of a high-frequency system, since frequency changes can occur even with minute influences, the PLL may include a voltage controller oscillator (VCO) and a phase frequency detector to provide a stable frequency supply. The PLL includes an input buffer and an output buffer, and can monitor the frequency through the input buffer and the output buffer. If the PLL is affected by external noise or jamming signals, it is difficult to provide a stable frequency supply, which may cause problems in demodulating the GNSS signal at the GNSS receiver (360).

[0057] In FIG. 3, the transceiver (375) includes a first PLL (350) that provides a frequency to a GNSS receiver (360) and a second PLL (355) that provides a frequency to an RF transceiver (365), but this is only one embodiment and the transceiver (375) may include three or more PLLs.

[0058] The transceiver (375) may include a buffer (345) that receives a frequency generated from the oscillator (340) and transmits the fundamental frequency to each PLL.

[0059] The GNSS positioning device (300) may further include a power supply (not shown). The power supply can supply power to the GNSS front end (305), the 5G module (315), and the RF front end (335). The power supply can be controlled by a processor (370), and the power supply can individually turn on or off the power to each of the GNSS front end (305), the 5G module (315), and the RF front end (335).

[0060] In the embodiment of FIG. 3, the output frequency of the first PLL (350) can be provided to a GNSS receiver (360) and used for GNSS signal demodulation. The output frequency of the second PLL (355) can be transmitted to an RF transceiver (365) and used for modulation and demodulation of an RF signal.

[0061] The processor (370) can generate data for communication, communicate with the transceiver (375), and control the transceiver (375). The processor (370) can monitor GNSS positioning failures that occur after the start of 5G communication and detect the occurrence of GNSS positioning failures. In one embodiment, the processor (370) can detect that a GNSS positioning failure has occurred if the current location of the GNSS positioning device (300), determined by GNSS positioning after the start of 5G communication, changes drastically compared to the previous location or if the signal is lost. For example, the processor (370) can detect that a GNSS positioning failure has occurred if the current location of the GNSS positioning device (300), determined by GNSS positioning, changes by more than a threshold value (e.g., a specific numerical value such as 30 cm) compared to the previous location.

[0062] When the processor (370) detects a GNSS positioning fault, it can determine whether the output frequency of the first PLL (350) used for GNSS signal demodulation in the GNSS receiver (360) is stable. In one embodiment, whether the output frequency of the first PLL (350) is stable can be determined based on whether the clock drift generated at the output frequency of the first PLL (350) is greater than or equal to a first threshold value. The processor (370) can determine that the output frequency of the first PLL (350) is unstable if the clock drift generated at the output frequency of the first PLL (350) is greater than or equal to the first threshold value, and determine that the output frequency of the first PLL (350) is stable if the clock drift generated at the output frequency of the first PLL (350) is less than the first threshold value. For example, if the clock drift generated at the output frequency of the first PLL (350) is 50 ppb or more, the processor (370) may determine that the output frequency of the first PLL (350) is unstable.

[0063] If the processor (370) determines that the output frequency of the first PLL (350) is stable, it can maintain the frequency used for demodulating the GNSS signal as the output frequency of the first PLL (350).

[0064] If the processor (370) determines that the output frequency of the first PLL (350) is unstable, it can determine whether the output frequency of the second PLL (355) is stable. In one embodiment, whether the output frequency of the second PLL (355) is stable can be determined based on whether the clock drift generated at the output frequency of the second PLL (355) is greater than or equal to a second threshold value. The processor (370) can determine that the output frequency of the second PLL (355) is unstable if the clock drift generated at the output frequency of the second PLL (355) is greater than or equal to the second threshold value, and can determine that the output frequency of the second PLL (355) is stable if the clock drift generated at the output frequency of the second PLL (355) is less than the second threshold value.

[0065] If the processor (370) determines that the output frequency of the second PLL (355) is stable, it can change the frequency used for demodulating the GNSS signal to the output frequency of the second PLL (355). When the frequency used for demodulating the GNSS signal is changed to the output frequency of the second PLL (355), the GNSS receiver (360) can demodulate the GNSS signal using the output frequency of the second PLL (355). Since the output frequency of the second PLL (355) has a lower clock drift compared to the output frequency of the first PLL (350), the GNSS receiver (360) can improve GNSS positioning errors by performing demodulation of the GNSS signal using a more stable frequency.

[0066] If the processor (370) determines that the output frequency of the second PLL (355) is unstable, it may change the frequency used for demodulating the GNSS signal to the fundamental frequency input to the first PLL (350) and the second PLL (355). The fundamental frequency may be a frequency provided by the buffer (345). The fundamental frequency may have a lower clock drift compared to the output frequency of the second PLL (355), and the GNSS receiver (360) may improve GNSS positioning errors by performing demodulation of the GNSS signal using the more stable frequency.

[0067] The processor (370) can change the frequency used for demodulating the GNSS signal to the output frequency of the first PLL (350) while 5G communication is terminated and GNSS positioning is not performed. When 5G communication is terminated, the cause of clock drift is removed, so the unstable output frequency of the first PLL (350) can be stabilized again, and the output frequency of the first PLL (350) can be used again for demodulating the GNSS signal.

[0068] The processor (370) can monitor whether the output frequency of the first PLL (350) is stable. If the processor (370) monitors whether the output frequency of the first PLL (350) is stable, the frequency used for demodulating the GNSS signal while GNSS positioning is not performed can be changed back to the output frequency of the first PLL (350).

[0069] In another embodiment, the processor (370) may monitor whether the output frequencies of all PLLs included in the transceiver (375) are stable. For example, the processor (370) may periodically monitor whether the output frequencies of all PLLs included in the transceiver (375) are stable. When the processor (370) detects a GNSS positioning failure after the start of 5G communication, it may determine the most stable output frequency among all PLL output frequencies based on the monitoring results. The processor (370) may determine the output frequency of the PLL with the lowest clock drift as the output frequency of the most stable PLL. The processor (370) may change the frequency used for GNSS signal demodulation to the output frequency of the most stable PLL. If the output frequency of the PLL with the lowest clock drift has a clock drift greater than a threshold value, the processor (370) may change the frequency used for GNSS signal demodulation to the fundamental frequency. Thus, the GNSS receiver (360) can perform demodulation of the GNSS signal using a more stable frequency and can quickly improve GNSS positioning errors.

[0070] For example, if the transceiver (375) includes a first PLL (350), a second PLL (355), and a third PLL (not shown), the processor (370) can monitor the clock drift of the output frequencies of the first PLL (350), the second PLL (355), and the third PLL (not shown). If the processor (370) detects a GNSS positioning failure after the start of 5G communication, it can determine the output frequency of the most stable PLL based on the monitoring results and change the frequency used for GNSS signal demodulation to the output frequency of the most stable PLL. For example, if the clock drift of the output frequency of the third PLL (not shown) is the lowest and is below a threshold value, the processor (370) can change the frequency used for GNSS signal demodulation to the output frequency of the third PLL (not shown).

[0071] The processor (370) can improve GNSS positioning failures by using 5G network coverage map data when there is a history of changes to the frequency used for GNSS signal demodulation. This will be explained with reference to FIG. 4.

[0072] FIG. 4 is a diagram illustrating a 5G communication network coverage map that can be used in a method for GNSS positioning according to one embodiment and an electronic device performing the method.

[0073] Referring to FIG. 4, a 5G communication network coverage map (400) is shown, indicating areas (405) where 5G communication can be provided and areas (410) where 5G communication is not supported, indicated by square blocks.

[0074] The processor (370) can check whether there is a history of changing the output frequency of the first PLL (350) used for demodulating the GNSS signal to the output frequency of the second PLL (355) included in the GNSS positioning device (300). If there is a history of changing the frequency used for GNSS demodulation at least once in the past, this history implies that GNSS positioning problems may occur again during 5G communication in the GNSS positioning device (300), so the GNSS positioning device (300) can prevent GNSS positioning failures in advance by using the 5G communication network coverage map (400).

[0075] In one embodiment, the processor (370) determines the current movement path of the GNSS positioning device (300) and can predict entry into the area (405) where 5G communication can be provided based on the current movement path and 5G communication network coverage map (400) data containing information about the area (405) where 5G communication can be provided. When entry into the area (405) where 5G communication can be provided is predicted, the processor (370) can change the frequency used for demodulating the GNSS signal to the output frequency of the second PLL (355) included in the history before entering the area (405) where 5G communication can be provided.

[0076] According to a GNSS positioning device (300) according to one embodiment, the frequency used for GNSS demodulation at the time of the change in the history may be changed to the output frequency of the second PLL (355) because the output frequency of the second PLL (355) has a lower clock drift than the output frequency of the first PLL (350). Since the clock drift of the output frequency of the second PLL (355) at the time of the change in the history is lower means that the output frequency of the second PLL (355) is less affected by 5G communication, the GNSS positioning device (300) can prevent GNSS positioning failure caused by 5G communication in advance by changing the frequency used for demodulation of the GNSS signal to the output frequency of the second PLL (355) which is less affected by 5G communication before entering an area (405) where 5G communication of the GNSS positioning device (300) can be provided.

[0077] The processor (370) can change the frequency used for GNSS positioning to the output frequency of the first PLL (350) while the GNSS positioning device (300) is out of an area where 5G communication can be provided and GNSS positioning has ended.

[0078] The processor (370) monitors whether the output frequency of the first PLL (350) is stable, and if the output frequency of the first PLL (350) is stable, it can change the frequency used for demodulating the GNSS signal to the output frequency of the first PLL (350) while GNSS positioning is not performed.

[0079] An electronic device (101) according to one embodiment may include a processor (370), a GNSS antenna (310) for receiving a GNSS signal from a satellite for GNSS (global navigation satellite system) positioning, a GNSS receiver (360) for demodulating a GNSS signal, an RF transceiver (365), a first PLL (phase locked loop) (350) for providing a frequency for operating the GNSS receiver (360), and a second PLL (355) for providing a frequency for operating the RF transceiver (365), a transceiver (375) that communicates with the processor (370), and a 5G module (315) that includes an antenna for 5G (generation) communication and communicates with the RF transceiver (365).

[0080] A processor (370) according to one embodiment monitors the occurrence of a GNSS positioning failure during 5G communication, determines whether the output frequency of the first PLL (350) used for demodulating the GNSS signal is stable, and if the output frequency of the first PLL (350) is unstable, can change the frequency used for demodulating the GNSS signal to the output frequency of the second PLL (355) or the basic frequency input to the first PLL (350) and the second PLL (355).

[0081] A processor (370) according to one embodiment may determine that the output frequency of the first PLL (350) is unstable when the clock drift generated at the output frequency of the first PLL (350) is greater than or equal to a first threshold value, and determine that the output frequency of the first PLL (350) is stable when the clock drift generated at the output frequency of the first PLL (350) is less than the first threshold value.

[0082] A processor (370) according to one embodiment determines whether the output frequency of the second PLL (355) is stable, and if the output frequency of the second PLL (355) is stable, changes the frequency used for demodulating the GNSS signal to the output frequency of the second PLL (355), and if the output frequency of the second PLL (355) is unstable, changes the frequency used for demodulating the GNSS signal to the fundamental frequency.

[0083] A processor (370) according to one embodiment may determine that the output frequency of the second PLL (355) is unstable when the clock drift generated at the output frequency of the second PLL (355) is greater than or equal to the second threshold value, and determine that the output frequency of the second PLL (355) is stable when the clock drift generated at the output frequency of the second PLL (355) is less than the second threshold value.

[0084] A processor (370) according to one embodiment can change the frequency used for demodulating a GNSS signal to the output frequency of the first PLL (350) while 5G communication is terminated and GNSS positioning is not performed in the electronic device (101).

[0085] A processor (370) according to one embodiment monitors whether the output frequency of the first PLL (350) is stable, and if the clock drift of the output frequency of the first PLL (350) is stable as a result of monitoring, the frequency used for demodulating the GNSS signal while GNSS positioning is not performed can be changed to the output frequency of the first PLL (350).

[0086] A processor (370) according to one embodiment determines the current movement path of an electronic device (101), predicts entry into an area (405) where 5G communication can be provided based on the current movement path and 5G communication network coverage map (400) data containing information about an area (405) where 5G communication can be provided, and if there is a history of changing the frequency used for demodulating a GNSS signal, the frequency used for demodulating a GNSS signal can be changed to the output frequency of a second PLL (355) before entering the area (405) where 5G communication can be provided.

[0087] A processor (370) according to one embodiment can change the frequency used for demodulating the GNSS signal to the output frequency of the first PLL (350) while the electronic device (101) is out of the area (405) where 5G communication can be provided and GNSS positioning has ended.

[0088] A processor (370) according to one embodiment monitors whether the output frequency of the first PLL (350) is stable, and if the clock drift of the output frequency of the first PLL (350) is stable, it can change the frequency used for demodulating the GNSS signal to the output frequency of the first PLL (350) while GNSS positioning is not performed.

[0089] A processor (370) according to one embodiment can detect that a failure in the GNSS positioning has occurred when the current position determined by the GNSS positioning differs from the previous position by more than a threshold value.

[0090] Referring to FIG. 5, a flowchart illustrating a method for GNSS positioning is shown. In operation (505), the GNSS positioning device (300) can initiate 5G communication. For example, the GNSS positioning device (300) can move from an area (410) in FIG. 4 where 5G communication is not supported to an area (405) where 5G communication can be provided and initiate 5G communication.

[0091] In operation (510), the GNSS positioning device (300) can monitor for the occurrence of a GNSS positioning failure. When 5G communication is initiated, a problem may occur in the GNSS positioning of the GNSS positioning device (300), and the GNSS positioning device (300) can detect the occurrence of a GNSS positioning failure. The GNSS positioning device (300) can detect that a GNSS positioning failure has occurred if, after the initiation of 5G communication in operation (505), the current location determined by GNSS positioning changes drastically compared to the previous location or the signal is lost. For example, the GNSS positioning device (300) can detect that a GNSS positioning failure has occurred if the current location determined by GNSS positioning changes by more than a threshold value compared to the previous location.

[0092] In operation (515), the GNSS positioning device (300) can determine whether the output frequency of the first PLL (350) is stable by determining whether the clock drift generated at the output frequency of the first PLL (350) used for demodulating the GNSS signal is greater than or equal to a first threshold value.

[0093] When the clock drift of the output frequency of the first PLL (350) is below a threshold value, the clock drift is not the cause of the GNSS positioning failure, so in operation (540), the GNSS positioning device (300) can use the output frequency of the first PLL (350) without changing the frequency used for demodulating the GNSS signal. According to one embodiment, while the GNSS positioning device (300) uses the output frequency of the first PLL (350) for demodulating the GNSS signal, it can periodically perform an operation (510) of monitoring whether a GNSS positioning failure occurs.

[0094] When the clock drift of the output frequency of the first PLL (350) is greater than or equal to a threshold value, in operation (520), the GNSS positioning device (300) can determine whether the output frequency of the second PLL (355) is stable by determining whether the clock drift generated at the output frequency of the second PLL (355) is greater than or equal to a second threshold value. The first threshold value and the second threshold value may be the same or different.

[0095] When the clock drift of the output frequency of the second PLL (355) is below a threshold value, the output frequency of the second PLL (355) is less affected by the 5G communication module (315) and is stable; therefore, in operation (525), the GNSS positioning device (300) can change the frequency used for demodulating the GNSS signal to the output frequency of the second PLL (355). By demodulating the GNSS signal using a more stable frequency, the GNSS positioning device (300) can quickly recover from GNSS positioning failures and accurately measure the current location.

[0096] If the clock drift of the output frequency of the second PLL (355) is greater than or equal to a threshold value, the output frequency of the second PLL (355) is also unstable, so the GNSS positioning device (300) can change the frequency used for demodulating the GNSS signal to a fundamental frequency in operation (530). The fundamental frequency may be a frequency provided by a buffer (345) that supplies frequencies to the first PLL (350) and the second PLL (355). The GNSS positioning device (300) can avoid GNSS positioning failures by demodulating the GNSS signal using the fundamental frequency instead of the unstable frequency.

[0097] In operation (535), 5G communication and GNSS positioning may be terminated. When 5G communication and GNSS positioning are terminated, the GNSS positioning device (300) may, in operation (540), change the frequency used for demodulating the GNSS signal back to the output frequency of the first PLL (350).

[0098] In another example, the GNSS positioning device (300) may monitor whether the output frequency of the first PLL (350) is stable instead of the operation (535). If the output frequency of the first PLL (350) is stable as a result of the monitoring, the GNSS positioning device (300) may, in the operation (540), change the frequency used for demodulating the GNSS signal during the termination of GNSS positioning to the output frequency of the first PLL (350).

[0099] FIG. 6 is a flowchart illustrating a method for GNSS positioning according to another embodiment.

[0100] In operation (605), the GNSS positioning device (300) can initiate 5G communication. For example, the GNSS positioning device (300) can move from an area (410) in FIG. 4 where 5G communication is not supported to an area (405) where 5G communication can be provided and initiate 5G communication.

[0101] In operation (610), the occurrence of a GNSS positioning failure of the GNSS positioning device (300) can be monitored. A failure in GNSS positioning may occur in the GNSS positioning of the GNSS positioning device (300), and the GNSS positioning device (300) can detect the occurrence of a GNSS positioning failure. The GNSS positioning device (300) can detect that a GNSS positioning failure has occurred if, after the start of 5G communication in operation (605), the current location determined by GNSS positioning changes drastically compared to the previous location or the signal is lost. For example, the GNSS positioning device (300) can detect that a GNSS positioning failure has occurred if the current location determined by GNSS positioning changes by more than a threshold value compared to the previous location.

[0102] In operation (615), the GNSS positioning device (300) can monitor the clock drift of the output frequency of each of the various PLLs included in the GNSS positioning device (300).

[0103] In operation (620), the GNSS positioning device (300) can determine the output frequency of the most stable PLL among the PLLs included in the GNSS positioning device (300) based on the monitoring results. The GNSS positioning device (300) can determine the output frequency of the PLL having the lowest clock drift as the output frequency of the most stable PLL. For example, the GNSS positioning device (300) can determine the output frequency of the third PLL as the output frequency of the most stable PLL when the clock drift of the output frequency of the first PLL (350) is 70 ppb, the clock drift of the output frequency of the second PLL (355) is 50 ppb, and the clock drift of the output frequency of the third PLL is 20 ppb. In operation (620), the GNSS positioning device (300) can determine the fundamental frequency as the most stable instead of the output frequency of the PLLs when the output frequency of the PLL having the lowest clock drift has a clock drift greater than a threshold value.

[0104] In operation (625), the GNSS positioning device (300) can change the frequency used for demodulating the GNSS signal to the output frequency or fundamental frequency of the most stable PLL determined in operation (620). When a GNSS positioning failure occurs, the GNSS positioning device (300) can quickly improve the GNSS positioning failure and perform positioning accurately by demodulating the GNSS signal using the output frequency of the most stable PLL.

[0105] In operation (630), GNSS positioning may be terminated. When GNSS positioning is terminated, in operation (635), the GNSS positioning device (300) may change the frequency used for demodulating the GNSS signal to the output frequency of the first PLL (350) based on the clock drift monitoring result of the output frequency of the first PLL (350). For example, if the clock drift of the output frequency of the first PLL (350) is below a threshold value as a result of monitoring the clock drift of the output frequency of the first PLL (350), the GNSS positioning device (300) may change the frequency used for demodulating the GNSS signal back to the output frequency of the first PLL (350) because the output frequency of the first PLL (350) is stable.

[0106] FIG. 7 is a flowchart illustrating a method for GNSS positioning using 5G communication network coverage map data according to one embodiment.

[0107] Referring to FIG. 7, a flowchart of a method for preventing GNSS positioning failures in advance during 5G communication using the 5G communication network coverage map (400) of FIG. 4 is illustrated. The operation (705) can be performed after the operation (540) of FIG. 5.

[0108] In operation (705), the GNSS positioning device (300) can determine the current path of travel.

[0109] In operation (710), the GNSS positioning device (300) can predict whether to enter an area (405) where 5G communication can be provided based on 5G communication network coverage map (400) data containing information about an area (405) where 5G communication can be provided and the current travel path.

[0110] If it is predicted that the GNSS positioning device (300) will not enter an area (405) where 5G communication can be provided, in operation (725), the output frequency of the first PLL (350) can be used as is without changing the frequency used for demodulating the GNSS signal.

[0111] When entry into an area (405) where 5G communication can be provided is predicted and there is a history of changing the frequency used for demodulating the GNSS signal, the GNSS positioning device (300) can, in operation (715), change the frequency used for demodulating the GNSS signal to the output frequency of the second PLL (355) included in the history prior to entry into the area (405) where 5G communication can be provided.

[0112] If there is a history of changing the frequency used for GNSS demodulation at least once in the past, this history may mean that GNSS positioning problems may occur again during 5G communication. The reason the frequency used for GNSS demodulation was changed to the output frequency of the second PLL (355) at the time of the history change may be because the output frequency of the second PLL (355) had a lower clock drift than the output frequency of the first PLL (350). Since the clock drift of the output frequency of the second PLL (355) was lower at the time of the history change, it means that the output frequency of the second PLL (355) is less affected by the 5G communication module (315), so the GNSS positioning device (300) can prevent GNSS positioning interference caused by 5G communication in advance by changing the frequency used for demodulating the GNSS signal to the output frequency of the second PLL (355) that is less affected by 5G communication before entering an area (405) where 5G communication can be provided.

[0113] In operation (720), 5G communication and GNSS positioning may be terminated. When 5G communication and GNSS positioning are terminated, the GNSS positioning device (300) may, in operation (725), change the frequency used for demodulating the GNSS signal back to the output frequency of the first PLL (350).

[0114] In another example, the GNSS positioning device (300) may monitor whether the output frequency of the first PLL (350) is stable instead of the operation (720). If the output frequency of the first PLL (350) is stable, the GNSS positioning device (300) may, in the operation (725), change the frequency used for demodulating the GNSS signal during the termination of GNSS positioning to the output frequency of the first PLL (350).

[0115] A method for GNSS positioning according to one embodiment may include an operation of monitoring whether a failure in GNSS positioning has occurred, an operation of determining whether the output frequency of a first PLL (350) (phase locked loop) used for demodulating a GNSS signal received from a satellite for GNSS positioning is stable when a failure in GNSS positioning is detected, and an operation of changing the frequency used for demodulating the GNSS signal to the output frequency of a second PLL (355) or the fundamental frequency input to the first PLL (350) and the second PLL (355) when the output frequency of the first PLL (350) is unstable.

[0116] An operation to determine whether the output frequency of the first PLL (350) is stable may include an operation to determine that the output frequency of the first PLL (350) is unstable when the clock drift generated at the output frequency of the first PLL (350) is greater than or equal to a first threshold value, and an operation to determine that the output frequency of the first PLL (350) is stable when the clock drift generated at the output frequency of the first PLL (350) is less than the first threshold value.

[0117] The operation of changing the output frequency of the second PLL (355), or the fundamental frequency input to the first PLL (350) and the second PLL (355), may include an operation of determining whether the output frequency of the second PLL (355) is stable, an operation of changing the frequency used for demodulating the GNSS signal to the output frequency of the second PLL (355) when the output frequency of the second PLL (355) is stable, and an operation of changing the frequency used for demodulating the GNSS signal to the fundamental frequency when the output frequency of the second PLL (355) is unstable.

[0118] The operation of determining whether the output frequency of the second PLL (355) is stable may include the operation of determining that the output frequency of the second PLL (355) is unstable when the clock drift generated at the output frequency of the second PLL (355) is greater than or equal to the second threshold value, and the operation of determining that the output frequency of the second PLL (355) is stable when the clock drift generated at the output frequency of the second PLL (355) is less than the second threshold value.

[0119] It may further include an operation to change the frequency used for demodulating the GNSS signal to the output frequency of the first PLL (350) while 5G communication is terminated and GNSS positioning is not performed.

[0120] The operation of monitoring whether the output frequency of the first PLL (350) is stable, and if the output frequency of the first PLL (350) is stable as a result of monitoring, the operation of changing the frequency used for demodulating the GNSS signal to the output frequency of the first PLL (350) while GNSS positioning is not performed may be further included.

[0121] The method may further include an operation to determine the current movement path of an electronic device (101), an operation to predict entry into an area (405) where 5G communication can be provided based on 5G communication network coverage map (400) data containing information about an area (405) where 5G communication can be provided and the current movement path, and an operation to change the frequency used for demodulating the GNSS signal to the output frequency of the second PLL (355) before entering the area (405) where 5G communication can be provided, if there is a history of changing the frequency used for demodulating the GNSS signal.

[0122] The electronic device (101) may further include an operation to change the frequency used for demodulating the GNSS signal to the output frequency of the first PLL (350) while the electronic device (101) is out of the area (405) where 5G communication can be provided and GNSS positioning has ended.

[0123] The operation of monitoring whether the output frequency of the first PLL (350) is stable, and when the output frequency of the first PLL (350) is stable, the operation of changing the frequency used for demodulating the GNSS signal to the output frequency of the first PLL (350) while GNSS positioning is not performed may be further included.

[0124] The electronic device according to the various embodiments disclosed in this document may be of various forms. The electronic device may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a consumer electronics device. The electronic device according to the embodiments of this document is not limited to the devices described above.

[0125] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In this document, phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" may each include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish said components from other said components and do not limit said components in any other aspect (e.g., importance or order). Where any (e.g., 1st) component is referred to as “coupled” or “connected” to another (e.g., 2nd) component, with or without the terms “functionally” or “communicationly,” it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0126] The term “module” as used in the various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0127] Various embodiments of the present document may be implemented as software (e.g., program (140)) comprising one or more instructions stored in a storage medium (e.g., internal memory (136) or external memory (138)) readable by a machine (e.g., electronic device (101)). For example, a processor (e.g., processor (120)) of the machine (e.g., electronic device (101)) may call at least one of the one or more instructions stored in the storage medium and execute it. This enables the machine to be operated to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0128] According to one embodiment, the method according to the various embodiments disclosed herein may be provided as included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0129] According to various embodiments, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to various embodiments, one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to various embodiments, operations performed by the module, program, or other components may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

Claim 1 A method for performing GNSS (global navigation satellite system) positioning while 5G (generation) communication is performed in an electronic device, comprising: an operation of monitoring whether a failure in the GNSS positioning has occurred; an operation of determining whether the output frequency of a first PLL (phase locked loop) used for demodulating a GNSS signal received from a satellite for the GNSS positioning is stable when a failure in the GNSS positioning is detected; and an operation of changing the frequency used for demodulating the GNSS signal to the output frequency of a second PLL, or the fundamental frequency input to the first PLL and the second PLL, when the output frequency of the first PLL is unstable. Claim 2 A method according to claim 1, wherein the operation of determining whether the output frequency of the first PLL is stable comprises: an operation of determining that the output frequency of the first PLL is unstable when the clock drift generated at the output frequency of the first PLL is greater than or equal to a first threshold value; and an operation of determining that the output frequency of the first PLL is stable when the clock drift generated at the output frequency of the first PLL is less than the first threshold value. Claim 3 A method according to claim 1, wherein the operation of changing the output frequency of the second PLL, or the fundamental frequency input to the first PLL and the second PLL, comprises: an operation of determining whether the output frequency of the second PLL is stable; an operation of changing the frequency used for demodulating the GNSS signal to the output frequency of the second PLL when the output frequency of the second PLL is stable; and an operation of changing the frequency used for demodulating the GNSS signal to the fundamental frequency when the output frequency of the second PLL is unstable. Claim 4 In claim 3, the operation of determining whether the output frequency of the second PLL is stable comprises: an operation of determining that the output frequency of the second PLL is unstable when the clock drift generated at the output frequency of the second PLL is greater than or equal to a second threshold value; and an operation of determining that the output frequency of the second PLL is stable when the clock drift generated at the output frequency of the second PLL is less than the second threshold value. Claim 5 A method according to claim 1, further comprising the operation of changing the frequency used for demodulating the GNSS signal to the output frequency of the first PLL while the 5G communication is terminated and the GNSS positioning is not performed. Claim 6 A method according to claim 5, further comprising: an operation of determining the current movement path of the electronic device; an operation of predicting entry into an area where 5G communication can be provided based on 5G communication network coverage map data including information about an area where 5G communication can be provided and the current movement path; and an operation of changing the frequency used for demodulating the GNSS signal to the output frequency of the second PLL before entering the area where 5G communication can be provided, if there is a history of changing the frequency used for demodulating the GNSS signal. Claim 7 A method according to claim 6, further comprising the operation of changing the frequency used for demodulating the GNSS signal to the output frequency of the first PLL while the electronic device is out of the area where the 5G communication can be provided and the GNSS positioning has ended. Claim 8 A method according to claim 6, further comprising: an operation of monitoring whether the output frequency of the first PLL is stable; and, when the output frequency of the first PLL is stable, an operation of changing the frequency used for demodulating the GNSS signal to the output frequency of the first PLL while the GNSS positioning is not performed. Claim 9 A method according to claim 1, further comprising: an operation of monitoring whether the output frequency of the first PLL is stable; and, if the output frequency of the first PLL is stable as a result of the monitoring, an operation of changing the frequency used for demodulation of the GNSS signal to the output frequency of the first PLL while the GNSS positioning is not performed. Claim 10 A computer-readable recording medium storing a computer program that executes the method of any one of paragraphs 1 through 9. Claim 11 An electronic device comprising: a processor; a GNSS antenna receiving a GNSS signal from a satellite for GNSS (global navigation satellite system) positioning; a transceiver communicating with the processor, comprising a GNSS receiver for demodulating the GNSS signal, an RF transceiver, a first PLL (phase locked loop) providing a frequency for the operation of the GNSS receiver, and a second PLL providing a frequency for the operation of the RF transceiver; and a 5G module including an antenna for 5G (generation) communication and communicating with the RF transceiver, wherein the processor monitors for the occurrence of a failure in the GNSS positioning during the 5G communication, determines whether the output frequency of the first PLL used for demodulating the GNSS signal is stable, and if the output frequency of the first PLL is unstable, changes the frequency used for demodulating the GNSS signal to the output frequency of the second PLL or the fundamental frequency input to the first PLL and the second PLL. Claim 12 An electronic device according to claim 11, wherein the processor determines that the output frequency of the first PLL is unstable when the clock drift generated at the output frequency of the first PLL is greater than or equal to a first threshold value, and determines that the output frequency of the first PLL is stable when the clock drift generated at the output frequency of the first PLL is less than the first threshold value. Claim 13 An electronic device according to claim 11, wherein the processor determines whether the output frequency of the second PLL is stable, and if the output frequency of the second PLL is stable, changes the frequency used for demodulating the GNSS signal to the output frequency of the second PLL, and if the output frequency of the second PLL is unstable, changes the frequency used for demodulating the GNSS signal to the fundamental frequency. Claim 14 An electronic device according to claim 13, wherein the processor determines that the output frequency of the second PLL is unstable when the clock drift generated at the output frequency of the second PLL is greater than or equal to a second threshold value, and determines that the output frequency of the second PLL is stable when the clock drift generated at the output frequency of the second PLL is less than the second threshold value. Claim 15 In claim 11, the processor is an electronic device that changes the frequency used for demodulating the GNSS signal to the output frequency of the first PLL while the 5G communication is terminated and the GNSS positioning is not performed in the electronic device. Claim 16 An electronic device according to claim 15, wherein the processor determines the current movement path of the electronic device, predicts entry into the area where 5G communication can be provided based on the current movement path and 5G communication network coverage map data including information about the area where 5G communication can be provided, and, if there is a history of changing the frequency used for demodulating the GNSS signal, changes the frequency used for demodulating the GNSS signal to the output frequency of the second PLL before entering the area where 5G communication can be provided. Claim 17 In claim 16, the processor is an electronic device that changes the frequency used for demodulating the GNSS signal to the output frequency of the first PLL while the electronic device is out of the area where the 5G communication can be provided and the GNSS positioning has ended. Claim 18 An electronic device according to claim 16, wherein the processor monitors whether the output frequency of the first PLL is stable, and if the clock drift of the output frequency of the first PLL is stable, changes the frequency used for demodulating the GNSS signal to the output frequency of the first PLL while the GNSS positioning is not performed. Claim 19 An electronic device according to claim 11, wherein the processor monitors whether the output frequency of the first PLL is stable, and if the clock drift of the output frequency of the first PLL is stable as a result of the monitoring, changes the frequency used for demodulating the GNSS signal to the output frequency of the first PLL while the GNSS positioning is not performed. Claim 20 In claim 11, the processor is an electronic device that detects that a failure in the GNSS positioning has occurred when the current position determined by the GNSS positioning differs from the previous position by more than a threshold value.

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