Electronic device for selecting PLMN during roaming, operation method thereof, and storage medium

Abstract

This electronic device may enable: performing an operation for accessing a first cell of a first visited-public land mobile network (V-PLMN); performing a scan on the basis of identifying the occurrence of an event for performing the scan after accessing the first cell according to the performing of the operation for accessing the first cell; on the basis of the result of the scan, identifying a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN, and a third cell supporting a second RAT of the first V-PLMN, wherein the priority of the second V-PLMN is less than or equal to the priority of the first V-PLMN; selecting the second V-PLMN on the basis that the first RAT supported by the second cell is a specified RAT, and the second RAT supported by the third cell is not the specified RAT; and performing an operation for accessing the second cell of the second V-PLMN.

Description

Electronic device for selecting PLMN during roaming, method of operation thereof and storage medium thereof

[0001] The present disclosure relates to an electronic device for selecting a public land mobile network (PLMN) while roaming, a method of operating the same, and a storage medium.

[0002] A PLMN refers to a communications network that provides wireless communication services to users and can typically be categorized by operator. HPLMN, the "home PLMN," refers to the PLMN to which a user subscribes and manages user profiles. VPLMN, the "visited PLMN," can refer to the PLMN to which a user roams. For example, an electronic device that was in an HPLMN area may leave the HPLMN area. The electronic device may move to an area where HPLMN is not supported, thereby triggering roaming. To use communication services, the electronic device must select a VPLMN supported in another area and complete the registration process. Since the operator of the VPLMN can enter into a roaming agreement with the operator of the HPLMN, the electronic device can use communication services through the VPLMN.

[0003] In a roaming area, multiple VPLMNs may be supported. An electronic device may select one of the multiple VPLMNs. For example, the electronic device may select one VPLMN based on user selection, which may be referred to as manual mode. For example, the electronic device may select one VPLMN without user selection, which may be referred to as automatic mode.

[0004] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above-described matters constitute prior art related to the present disclosure.

[0005] According to one embodiment of the present disclosure, an electronic device may include one or more processors including processing circuitry.

[0006] According to one embodiment of the present disclosure, an electronic device may include a memory that stores instructions.

[0007] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to perform an operation for connecting to a first cell of a first visited-public land mobile network (V-PLMN).

[0008] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to perform a scan based on determining the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0009] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to identify, based on a result of the scan, a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN and a third cell supporting the second RAT of the first V-PLMN.

[0010] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0011] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to select the second V-PLMN and perform an operation for connection of the second V-PLMN to the second cell based on the first RAT supported by the second cell being a designated RAT and the second RAT supported by the third cell being not the designated RAT.

[0012] According to one embodiment of the present disclosure, a storage medium storing computer-readable instructions may be provided.

[0013] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors of an electronic device including processing circuitry, may cause the electronic device to perform an operation for accessing a first cell of a first visited-public land mobile network (V-PLMN).

[0014] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to perform a scan based on determining the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0015] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to identify, based on a result of the scan, a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN and a third cell supporting the second RAT of the first V-PLMN.

[0016] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0017] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to select the second V-PLMN and perform an operation for connection of the second V-PLMN to the second cell based on the first RAT supported by the second cell being a designated RAT and the second RAT supported by the third cell being not the designated RAT.

[0018] According to one embodiment of the present disclosure, a method of operating an electronic device may include performing an operation for accessing a first cell of a first visited-public land mobile network (V-PLMN).

[0019] According to one embodiment of the present disclosure, the method of operating the electronic device may include an operation of performing a scan based on confirming the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0020] According to one embodiment of the present disclosure, the method of operating the electronic device may include an operation of identifying a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN and a third cell supporting the second RAT of the first V-PLMN, based on a result of the scan.

[0021] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0022] According to one embodiment of the present disclosure, the method of operating the electronic device may include selecting the second V-PLMN based on the first RAT supported by the second cell being a designated RAT and the second RAT supported by the third cell being not the designated RAT, and performing an operation for connection of the second V-PLMN to the second cell.

[0023] According to one embodiment of the present disclosure, an electronic device may include one or more processors including processing circuitry.

[0024] According to one embodiment of the present disclosure, an electronic device may include a memory that stores instructions.

[0025] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to perform an operation for connecting to a first cell of a first visited-public land mobile network (V-PLMN).

[0026] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to perform a scan based on determining the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0027] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to identify a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN, based on a result of the scan.

[0028] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0029] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to stop performing an additional scan for identifying a cell of the first V-PLMN, select the second V-PLMN, and perform an operation for connecting the second V-PLMN to the second cell based on the first RAT supported by the second cell being a designated RAT.

[0030] According to one embodiment of the present disclosure, a storage medium storing computer-readable instructions may be provided.

[0031] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors of an electronic device including processing circuitry, may cause the electronic device to perform an operation for accessing a first cell of a first visited-public land mobile network (V-PLMN).

[0032] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to perform a scan based on determining the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0033] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to identify a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN, based on a result of the scan.

[0034] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0035] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors, may cause the electronic device to stop performing an additional scan for identifying a cell of the first V-PLMN, select the second V-PLMN, and perform an operation for connecting the second V-PLMN to the second cell based on the first RAT supported by the second cell being a designated RAT.

[0036] According to one embodiment of the present disclosure, a method of operating an electronic device may include performing an operation for accessing a first cell of a first visited-public land mobile network (V-PLMN).

[0037] According to one embodiment of the present disclosure, the method of operating the electronic device may include an operation of performing a scan based on confirming the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0038] According to one embodiment of the present disclosure, the method of operating the electronic device may include an operation of identifying a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN, based on a result of the scan.

[0039] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0040] According to one embodiment of the present disclosure, the method of operating the electronic device may include an operation of stopping an additional scan for identifying a cell of the first V-PLMN, selecting the second V-PLMN, and performing an operation for connecting the second V-PLMN to the second cell, based on the first RAT supported by the second cell being a designated RAT.

[0041] FIG. 1 is a block diagram of an electronic device within a network environment, according to one embodiment.

[0042] FIG. 2A is a block diagram of an electronic device for supporting legacy network communication and 5G network communication according to one embodiment.

[0043] FIG. 2b is a block diagram of an electronic device for supporting legacy network communication and 5G network communication according to one embodiment.

[0044] FIG. 3A is a diagram illustrating a wireless communication system providing a network of legacy communications and / or 5G communications according to one embodiment.

[0045] FIG. 3b is a diagram illustrating a wireless communication system providing a network of legacy communications and / or 5G communications according to one embodiment.

[0046] FIG. 3c is a diagram illustrating a wireless communication system providing a network of legacy communications and / or 5G communications according to one embodiment.

[0047] FIG. 4A is a drawing for explaining an operation method of an electronic device according to one embodiment.

[0048] FIG. 4b is a diagram for explaining PLMN and / or cell selection of an electronic device in a roaming state according to one embodiment.

[0049] FIG. 4c is a drawing for explaining an operation method of an electronic device according to one embodiment.

[0050] FIG. 4d is a drawing for explaining an operation method of an electronic device according to one embodiment.

[0051] FIG. 5A is a drawing for explaining an operation method of an electronic device according to one embodiment.

[0052] FIG. 5b is a drawing for explaining an operation method of an electronic device according to one embodiment.

[0053] FIG. 6 is a drawing for explaining an operating method of an electronic device according to one embodiment.

[0054] FIG. 7 is a drawing for explaining an operating method of an electronic device according to one embodiment.

[0055] FIG. 8 is a drawing for explaining an operating method of an electronic device according to one embodiment.

[0056] FIG. 9 is a drawing for explaining the operation of an electronic device according to one embodiment.

[0057] FIG. 10 is a drawing for explaining an operating method of an electronic device according to one embodiment.

[0058] FIG. 1 is a block diagram of an electronic device (101) within a network environment (100), according to one embodiment.

[0059] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with an electronic device (104) or a server (108) via a second network (199) (e.g., a long-range wireless communication network). In one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0060] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or operations. According to one embodiment, as at least a part of the data processing or operations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or an auxiliary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together with the main processor (121). For example, when the electronic device (101) includes the main processor (121) and the auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a given function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0061] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, in the electronic device (101) itself where artificial intelligence is performed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0062] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0063] 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).

[0064] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0065] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0066] The display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0067] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0068] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0069] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with an external electronic device (e.g., the electronic device (102)). In one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0070] The connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0071] The haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. According to one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0072] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0073] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

[0074] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0075] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (194) (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, the corresponding communication module can communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0076] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0077] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (197) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (198) or the second network (199), may be selected from the plurality of antennas, for example, by the communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device via the at least one selected antenna. In some embodiments, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197).

[0078] In one embodiment, the antenna module (197) may form a mmWave antenna module. In one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent to a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0079] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0080] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0081] FIG. 2A is a block diagram (200) of an electronic device (101) for supporting legacy network communication and 5G network communication according to one embodiment.

[0082] Referring to FIG. 2A, the electronic device (101) may include a first communication processor (212), a second communication processor (214), a first radio frequency integrated circuit (RFIC) (222), a second RFIC (224), a third RFIC (226), a fourth RFIC (228), a first radio frequency front end (RFFE) (232), a second RFFE (234), a first antenna module (242), a second antenna module (244), a third antenna module (246), and antennas (248). The electronic device (101) may further include a processor (120) and a memory (130). The second network (199) may include a first cellular Universal Radio Service (URSP) ruler network (292) and a second cellular Universal Radio Service (URSP) ruler network (294). In another embodiment, the electronic device (101) may further include at least one of the components described in FIG. 1A, and the second network (199) may further include at least one other network. In one embodiment, the first communication processor (212), the second communication processor (214), the first RFIC (222), the second RFIC (224), the fourth RFIC (228), the first RFFE (232), and the second RFFE (234) may form at least a portion of the wireless communication module (192). In another embodiment, the fourth RFIC (228) may be omitted or may be included as a part of the third RFIC (226).

[0083] The first communication processor (212) may establish a communication channel in a band to be used for wireless communication with the first CellURSP ruler network (292), and may support legacy network communication through the established communication channel. According to one embodiment, the first CellURSP ruler network may be a legacy network including a second generation (2G), 3G, 4G, or long term evolution (LTE) network. The second communication processor (214) may establish a communication channel corresponding to a designated band (e.g., about 6 GHz to about 60 GHz) among the bands to be used for wireless communication with the second CellURSP ruler network (294), and may support 5G network communication through the established communication channel. According to one embodiment, the second CellURSP ruler network (294) may be a 5G network defined by 3GPP. Additionally, according to one embodiment, the first communication processor (212) or the second communication processor (214) may support establishment of a communication channel corresponding to another designated band (e.g., about 6 GHz or less) among the bands to be used for wireless communication with the second cellular service provider (294), and 5G network communication through the established communication channel.

[0084] The first communication processor (212) can transmit and receive data with the second communication processor (214). For example, data classified to be transmitted through the second cellular URSP ruler network (294) may be changed to be transmitted through the first cellular URSP ruler network (292). In this case, the first communication processor (212) can receive the transmission data from the second communication processor (214). For example, the first communication processor (212) can transmit and receive data with the second communication processor (214) through the processor interface (213). The above interprocessor interface (213) may be implemented as, for example, a universal asynchronous receiver / transmitter (UART) (e.g., HS-UART (high speed-UART) or PCIe (peripheral component interconnect bus express) interface), but there is no limitation on its type. Alternatively, the first communication processor (212) and the second communication processor (214) may exchange control information and packet data information using, for example, a shared memory. The first communication processor (212) may transmit and receive various information, such as sensing information, information on output intensity, and resource block (RB) allocation information, with the second communication processor (214).

[0085] Depending on the implementation, the first communication processor (212) may not be directly connected to the second communication processor (214). In this case, the first communication processor (212) may transmit and receive data with the second communication processor (214) through the processor (120) (e.g., application processor). For example, the first communication processor (212) and the second communication processor (214) may transmit and receive data with the processor (120) (e.g., application processor) through an HS-UART interface or a PCIe interface, but there is no limitation on the type of interface. Alternatively, the first communication processor (212) and the second communication processor (214) may exchange control information and packet data information with the processor (120) (e.g., application processor) using shared memory.

[0086] 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 one embodiment, the first communication processor (212) or the second communication processor (214) may be formed in a single chip or a single package with the processor (120), the auxiliary processor (123), or the communication module (190). For example, as in FIG. 2B, the integrated communication processor (260) may support functions for communicating with both the first CellURSP ruler network (292) and the second CellURSP ruler network (294).

[0087] As described above, at least one of the processor (120), the first communication processor (212), the second communication processor (214), or the integrated communication processor (260) may be implemented as a single chip or a single package. In this case, the single chip or single package may include a memory (or storage means) that stores instructions that cause the performance of at least some of the operations performed according to one embodiment, and a processing circuit (or, the name thereof is not limited, such as an arithmetic circuit) for executing the instructions.

[0088] The first RFIC (222) may, upon transmission, convert a signal generated by the first communication processor (212) into a radio frequency (RF) signal of about 700 MHz to about 3 GHz used in the first cellular network (292) (e.g., a legacy network). Upon reception, the RF signal may be acquired from the first network (292) (e.g., a legacy network) via an antenna (e.g., the first antenna module (242)) and preprocessed via an RFFE (e.g., the first RFFE (232)). The first RFIC (222) may convert the preprocessed RF signal into a signal that may be processed by the first communication processor (212).

[0089] The second RFIC (224) may, upon transmission, convert a signal generated by the first communication processor (212) or the second communication processor (214) into an RF signal (hereinafter, a 5G Sub6 RF signal) of a Sub6 band (e.g., about 6 GHz or less) used in the second Cellular Secure Remote System (C-RSP) Ruler Network (294) (e.g., a 5G network). Upon reception, the 5G Sub6 RF signal may be acquired from the second Cellular Secure Remote System (C-RSP) Ruler Network (294) (e.g., a 5G network) via an antenna (e.g., the second antenna module (244)) and preprocessed via an RFFE (e.g., the second RFFE (234)). The second RFIC (224) may convert the preprocessed 5G Sub6 RF signal into a signal that may be processed by a corresponding communication processor among the first communication processor (212) or the second communication processor (214).

[0090] The third RFIC (226) can convert a signal generated by the second communication processor (214) into an RF signal (hereinafter, 5G Above6 RF signal) of a 5G Above6 band (e.g., about 6 GHz to about 60 GHz) to be used in the second CellURSP ruler network (294) (e.g., 5G network). Upon reception, the 5G Above6 RF signal can be acquired from the second CellURSP ruler network (294) (e.g., 5G network) via an antenna (e.g., antenna (248)) and preprocessed via the third RFFE (236). The third RFIC (226) can convert the preprocessed 5G Above6 RF signal into a signal that can be processed by the second communication processor (214). According to one embodiment, the third RFFE (236) can be formed as a part of the third RFIC (226).

[0091] The electronic device (101) may, according to one embodiment, include a fourth RFIC (228) separately from or at least as a part of the third RFIC (226). In this case, the fourth RFIC (228) may convert a signal generated by the second communication processor (214) into an RF signal (hereinafter, referred to as an IF signal) of an intermediate frequency band (e.g., about 9 GHz to about 11 GHz) and then transmit the IF signal to the third RFIC (226). The third RFIC (226) may convert the IF signal into a 5G Above6 RF signal. Upon reception, the 5G Above6 RF signal may be received from the second Cellular Service Provider Network (294) (e.g., a 5G network) via an antenna (e.g., antenna (248)) and converted into an IF signal by the third RFIC (226). The fourth RFIC (228) can convert the IF signal into a signal that can be processed by the second communication processor (214).

[0092] In one embodiment, the first RFIC (222) and the second RFIC (224) may be implemented as a single chip or at least a portion of a single package. In one embodiment, 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 may be connected to the first RFFE (232) and the second RFFE (234) to convert a signal into a signal in a band supported by the first RFFE (232) and / or the second RFFE (234), and transmit the converted signal to one of the first RFFE (232) and the second RFFE (234). In one embodiment, the first RFFE (232) and the second RFFE (234) may be implemented as at least a portion of a single chip or a single package. According to an example, at least one antenna module among the first antenna module (242) or the second antenna module (244) can be omitted or combined with another antenna module to process RF signals of a plurality of corresponding bands.

[0093] According to one embodiment, the third RFIC (226) and the antenna (248) may be disposed on the same substrate to form a third antenna module (246). For example, the wireless communication module (192) or the processor (120) may be disposed on the first substrate (e.g., main PCB). In this case, the third RFIC (226) may be disposed on a portion (e.g., bottom surface) of a second substrate (e.g., sub PCB) separate from the first substrate, and the antenna (248) may be disposed on another portion (e.g., top surface) to form the third antenna module (246). By disposing the third RFIC (226) and the antenna (248) on the same substrate, it is possible to reduce the length of the transmission line therebetween. This can reduce, for example, the loss (e.g., attenuation) of signals in a high-frequency band (e.g., about 6 GHz to about 60 GHz) used in 5G network communication due to the transmission line. Due to this, the electronic device (101) can improve the quality or speed of communication with the second network (294) (e.g., 5G network).

[0094] According to one embodiment, the antenna (248) may be formed as an antenna array including a plurality of antenna elements that may be used for beamforming. In this case, the third RFIC (226) may include a plurality of phase shifters (238) corresponding to the plurality of antenna elements, for example, as part of the third RFFE (236). Upon transmission, each of the plurality of phase shifters (238) may shift the phase of a 5G Above6 RF signal to be transmitted to an external source (e.g., a base station of a 5G network) of the electronic device (101) via its corresponding antenna element. Upon reception, each of the plurality of phase shifters (238) may shift the phase of a 5G Above6 RF signal received from the external source via its corresponding antenna element to the same or substantially the same phase. This enables transmission or reception via beamforming between the electronic device (101) and the external source.

[0095] The second CellURSP Ruler Network (294) (e.g., a 5G network) may operate independently (e.g., Stand-Alone (SA)) or connected to (e.g., Non-Stand Alone (NSA)) the first CellURSP Ruler Network (292) (e.g., a legacy network). For example, the 5G network may only have an access network (e.g., a 5G radio access network (RAN) or next generation RAN (NG RAN)) and no core network (e.g., next generation core (NGC)). In this case, the electronic device (101) may access an external network (e.g., the Internet) under the control of the core network (e.g., evolved packed core (EPC)) of the legacy network after accessing the access network of the 5G network. Protocol information for communication with a legacy network (e.g., LTE protocol information) or protocol information for communication with a 5G network (e.g., New Radio (NR) protocol information) may be stored in the memory (230) and accessed by other components (e.g., the processor (120), the first communication processor (212), or the second communication processor (214)).

[0096] FIG. 2b is a block diagram (250) of an electronic device (101) for supporting legacy network communication and 5G network communication according to one embodiment.

[0097] Referring to FIG. 2B, the electronic device (101) (e.g., the electronic device (101) of FIG. 1A, FIG. 1B, or FIG. 1C) may include an integrated communication processor (260) (e.g., the communication processor (510) of FIG. 1C), a first RFIC (222), a second RFIC (224), a third RFIC (226), a fourth RFIC (228), a first RFFE (232), a second RFFE (234), a first antenna module (242), a second antenna module (244), a third antenna module (246), and / or antennas (248). The electronic device (101) may further include a processor (120) and a memory (130). The second network (199) may include a first cellular network (292) and a second cellular network (294).

[0098] The block diagram (250) of the electronic device (101) illustrated in FIG. 2b is different from the block diagram (200) of the electronic device (101) illustrated in FIG. 2a only in that the first communication processor (212) and the second communication processor (214) are implemented as an integrated communication processor (260), and the remaining components included in the block diagram (250) of the electronic device (101) can be implemented similarly or substantially identically to the components included in the block diagram (200) of the electronic device (101) illustrated in FIG. 2a, and thus a detailed description thereof will be omitted.

[0099] FIG. 3A is a diagram illustrating a wireless communication system providing a network of legacy communications and / or 5G communications according to one embodiment.

[0100] Referring to FIG. 3A, a network environment (300a) may include at least one of a legacy network and a 5G network. In one embodiment, the legacy network may include a 3GPP standard 4G or LTE base station (e.g., eNodeB (eNB)) that supports wireless connection with an electronic device (101) (e.g., the electronic device (101) of FIG. 1, FIG. 2A, or FIG. 2B) and an EPC that manages 4G communication. The 5G network may include an NR base station (e.g., gNodeB (gNB)) that supports wireless connection with an electronic device (101) and a 5GC that manages 5G communication of the electronic device (101).

[0101] According to one embodiment, the electronic device (101) may transmit and receive control messages and user data via legacy communication and / or 5G communication. The control messages may include messages related to at least one of security control, bearer setup, authentication, registration, or mobility management of the electronic device (101). The user data may refer to user data excluding control messages transmitted and received between the electronic device (101) and the core network (330) (e.g., EPC (342)).

[0102] The electronic device (101) can transmit and receive at least one of a control message or user data with at least a part of a 5G network (e.g., an NR base station, 5GC) using at least a part of a legacy network (e.g., an LTE base station, EPC).

[0103] According to one embodiment, the network environment (300a) may include a network environment that provides dual connectivity (DC) to an LTE base station and an NR base station, and transmits and receives control messages with an electronic device (101) through a core network (330) of one of EPC or 5GC.

[0104] According to one embodiment, in a DC environment, one of an LTE base station or an NR base station may operate as a master node (MN) (310), and the other may operate as a secondary node (SN) (320). The MN (310) may be connected to a core network (330) and may transmit and receive control messages. The MN (310) and the SN (320) may be connected via a network interface and may transmit and receive messages related to management of radio resources (e.g., communication channels).

[0105] According to one embodiment, the MN (310) may be configured as an LTE base station, the SN (320) as an NR base station, and the core network (330) as an EPC. For example, control messages may be transmitted and received through the LTE base station and the EPC, and user data may be transmitted and received through at least one of the LTE base station and the NR base station.

[0106] According to one embodiment, the MN (310) may include an NR base station, the SN (320) may include an LTE base station, and the core network (330) may include a 5GC. For example, control messages may be transmitted and received through the NR base station and the 5GC, and user data may be transmitted and received through at least one of the LTE base station or the NR base station.

[0107] FIG. 3b is a diagram illustrating a wireless communication system providing a network of legacy communications and / or 5G communications according to one embodiment.

[0108] Referring to FIG. 3b, the network environment (300b) may include at least one of a legacy network and a 5G network. In one embodiment, the legacy network may include a 3GPP standard 4G or LTE base station (e.g., eNodeB (eNB)) that supports wireless connection with an electronic device (101) (e.g., the electronic device (101) of FIG. 1, FIG. 2a, or FIG. 2b) and an EPC that manages 4G communication. The 5G network may include a NR base station (350) (e.g., gNodeB (gNB)) that supports wireless connection with an electronic device (101) and a 5GC (352) that manages 5G communication of the electronic device (101).

[0109] According to one embodiment, the electronic device (101) can transmit and receive control messages and user data via legacy communication and / or 5G communication.

[0110] A 5G network may include an NR base station (350) and a 5GC (352), and may transmit and receive control messages and user data independently from an electronic device (101).

[0111] FIG. 3c is a diagram illustrating a wireless communication system providing a network of legacy communications and / or 5G communications according to one embodiment.

[0112] Referring to FIG. 3c, the network environment (300c) may include at least one of a legacy network and a 5G network. In one embodiment, the legacy network may include a 4G or LTE base station (340) (e.g., an eNodeB (eNB)) of the 3GPP standard that supports wireless connection with an electronic device (101) (e.g., the electronic device (101) of FIG. 1, FIG. 2a, or FIG. 2b) and an EPC (342) that manages 4G communication. The 5G network may include a NR base station (350) (e.g., a gNodeB (gNB)) that supports wireless connection with an electronic device (101) and a 5GC (352) that manages 5G communication of the electronic device (101).

[0113] According to one embodiment, the electronic device (101) can transmit and receive control messages and user data via legacy communication and / or 5G communication.

[0114] According to one embodiment, the legacy network and the 5G network can independently provide data transmission and reception. For example, the electronic device (101) and the EPC (342) can transmit and receive control messages and user data via the LTE base station (340). In another example, the electronic device (101) and the 5GC (352) can transmit and receive control messages and user data via the NR base station (350).

[0115] According to one embodiment, the electronic device (101) can be registered with at least one of the EPC (342) or the 5GC (352) to transmit and receive control messages.

[0116] According to one embodiment, 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 and received through an interface between the EPC (342) and the 5GC (352).

[0117] As described above, DC through an LTE base station (340) and an NR base station (350) may also be named EN-DC (E-UTRA new radio dual connectivity).

[0118] Recently, many telecommunications carriers are working to deploy stand-alone (SA) networks. Despite these efforts, unlike non-stand-alone (NSA) networks, SA networks may have difficulties in implementing SA roaming services due to differences between core networks. In addition, SA roaming services may require infrastructure such as signaling via hypertext transfer protocol version 2 (HTTP2) over transport layer security (TLS), security edge protection proxy (SEPP), service communication proxy (SCP), and binding support function (BSF).

[0119] FIG. 4A is a drawing for explaining an operation method of an electronic device according to one embodiment.

[0120] The embodiment of Fig. 4a will be described with reference to Fig. 4b.

[0121] FIG. 4b is a diagram for explaining PLMN and / or cell selection of an electronic device in a roaming state according to one embodiment.

[0122] According to one embodiment, the electronic device (101) may perform an operation for connecting to a first cell (411) of a first PLMN (e.g., A) as in FIG. 4B at a first time point (T1) in operation 401. For example, the electronic device (101) may select the first PLMN (e.g., A) in a roaming state as part of the operation for connecting to the first cell (411). Here, the roaming state may mean a state in which an HPLMN is not identified in a scan result of the PLMN and a VPLMN is identified. Alternatively, the roaming state may mean a state in which a mobile country code (MCC) value of an HPLMN of a SIM recognized by the electronic device (101) is different from an MCC value obtained by a scan operation in an area in which the electronic device (101) is currently located, and there is no limitation on how the roaming state is defined. The electronic device (101) may, for example, scan a surrounding PLMN and, from the scan results, determine that there is no HPLMN and that a first PLMN (e.g., A), which is a VPLMN, exists. The electronic device (101) may select the first PLMN (e.g., A), which is a VPLMN, based on a manual mode or an automatic mode. The electronic device (101) may scan cells of the selected first PLMN (e.g., A), as part of an operation for accessing the first cell (411). The electronic device (101) may select a first cell (411) that satisfies cell selection criteria based on the scan results, as part of an operation for accessing the first cell (411). The electronic device (101) may camp on the selected first cell (411), as part of an operation for accessing the first cell (411). The electronic device (101) may perform a random access operation on the camped-on first cell (411) as part of an operation for connecting to the first cell (411).Based on the above-described operation, the electronic device (101) can perform, but is not limited to, connection to the first cell (411), as will be understood by those skilled in the art. The first cell (411) can support, for example, a radio access technology (RAT) of evolved-UMTS (universal mobile telecommunications system) terrestrial radio access (E-UTRA). The electronic device (101) can perform at least some of the operations for connection to the first cell (411) based on the RAT of E-UTRA.

[0123] The electronic device (101) may perform a scan based on the determination of a failure in connection to the first cell (411) in operation 403. For example, the user may be carrying the electronic device (101) and may be out of the coverage of the first cell (411). For example, at a second time point (T2), the electronic device (101) may be located outside the coverage of the first cell (411), and thus, the electronic device (101) may determine a failure in connection to the first cell (411). For example, assume that the first PLMN (e.g., A) does not support handover to the first cell (411) in the area. By leaving the coverage of the first cell (411), the electronic device (101) may determine a failure in connection to the first cell (411). The electronic device (101) can perform a scan based on a failure of connection to the first cell (411).

[0124] The electronic device (101), in operation 405, can identify a second cell (431) of a second PLMN (e.g., B) based on the result of the scan. The electronic device (101) can perform a scan to identify, for example, an E-UTRA-based cell, and thereby identify a second cell (431) supporting E-UTRA. In operation 407, the electronic device (101), based on the fact that the second RAT (e.g., E-UTRA) supported by the second cell (431) is a designated RAT (e.g., E-UTRA or NR (new radio)) and that no cell supporting the designated RAT of the first PLMN (e.g., A) is identified, can perform an operation for accessing the second cell (431) of the second PLMN (e.g., B). The operation for accessing has been described above and will not be repeated herein.

[0125] For example, in the comparative example, the electronic device (101) can change the PLMN if a PLMN having a higher priority than the current PLMN is identified, or can change the PLMN if the service of the current PLMN is unavailable and a PLMN of the same or lower priority is identified. However, according to the comparative example, the electronic device (101) can access the cell (421) of the first PLMN (e.g., A). For example, the electronic device (101) can identify the cell (421) of the first PLMN (e.g., A) according to a scan based on the RAT of the GSM (Global System for Mobile communication). If the priority of the second PLMN (e.g., B) is equal to or lower than the priority of the first PLMN (e.g., A), in the comparative example, the electronic device (101) can select the second PLMN (e.g., B) only if the service of the first PLMN (e.g., A) is unavailable. The electronic device (101) cannot change the PLMN because it has identified the cell (421) of the first PLMN (e.g., A) based on the RAT of GSM. Accordingly, in the comparative example, the electronic device (101) can access the cell (421) of the first PLMN (e.g., A) and perform a communication service based on GSM supported by the cell (421). In this case, the electronic device (101) must perform a communication service based on GSM based on the first PLMN (e.g., A), even though it can perform a communication service based on E-UTRA based on the second PLMN (e.g., B).

[0126] According to an embodiment, the electronic device (101) may change the PLMN from the first PLMN (e.g., A) to the second PLMN (e.g., B) when a cell (431) of the second PLMN (e.g., B) supporting a designated RAT (e.g., E-UTRA or NR, but without limitation) is identified, even if the priority of the second PLMN (e.g., B) is equal to or lower than the priority of the first PLMN (e.g., A). Accordingly, the electronic device (101) may perform a communication service based on E-UTRA based on the second PLMN (e.g., B) instead of performing a communication service based on GSM based on the first PLMN (e.g., A). For example, the electronic device (101) may first perform a scan based on a designated RAT (e.g., E-UTRA or NR, but without limitation) to identify a cell (431) of a second PLMN (e.g., B), and if a cell of an existing PLMN (e.g., the first PLMN) of the designated RAT is not identified, the electronic device (101) may select the second PLMN (e.g., B). Although not shown, if a cell of the first PLMN (e.g., A) supporting the designated RAT (e.g., E-UTRA or NR, but without limitation) is identified, the electronic device (101) may not change the PLMN, but without limitation.

[0127] According to one embodiment, the electronic device (101) may identify a cell that supports a lower RAT, such as UTRA or GSM, when no cell supporting a specified RAT (e.g., E-UTRA or NR) is identified. In this case, the electronic device (101) may identify a cell (421) that supports the GSM RAT based on performing a GSM-based scan.

[0128] According to one embodiment, the electronic device (101) may identify a cell supporting GSM for an existing PLMN and a cell supporting UTRA for another PLMN. GSM and UTRA may not have a significant difference in performance, and in this case, the electronic device (101) may connect to a cell supporting GSM while maintaining the existing PLMN.

[0129] For example, the electronic device (101) may change the PLMN based on whether a cell of a PLMN with the same or lower priority supports the designated RAT when a designated application is running, as shown in FIG. 4A. The designated application may include, but is not limited to, an application requiring a large amount of traffic (e.g., a web browsing application, a streaming application, but is not limited to).

[0130] For example, if the HPLMN does not exist, the EPLMN (equivalent PLMN) may be given a higher priority than other PLMNs. For example, the priority for each PLMN may be determined based on the information (e.g., user controlled PLMN selector with access technology) stored in the SIM card inserted into the electronic device (101) or in the downloaded profile. For example, the priority for each PLMN may be determined based on the information (e.g., operator controlled PLMN selector with access technology) stored in the SIM card inserted into the electronic device (101) or in the downloaded profile. For example, the priority for each PLMN corresponding to each cell may be determined based on the signal quality from the cell. The priority for each PLMN may be determined according to, but is not limited to, the 3GPP standard document and / or operator policy.

[0131] FIG. 4c is a drawing for explaining an operation method of an electronic device according to one embodiment.

[0132] According to one embodiment, the electronic device (101) may perform an operation for connecting to the first cell (411) of the first PLMN (e.g., A) in operation 451. The electronic device (101) may perform a scan based on the occurrence of an event for performing a scan in operation 453. For example, the electronic device (101) may confirm the occurrence of an event, such as a failure to connect to the first cell (411), as described in FIG. 4A. Alternatively, the electronic device (101) may confirm the expiration of an H-PLMN timer (or another timer) as the occurrence of an event for performing a scan, which will be described later. Meanwhile, there is no limitation on the type and / or number of events for performing a scan. The electronic device (101), in operation 455, can identify a second cell (e.g., cell 431 of FIG. 4B) of the second PLMN (e.g., B) and a third cell (e.g., cell 421 of FIG. 4B) of the first PLMN (e.g., A) based on the result of the scan. For example, the electronic device (101) can continuously perform the scan even if it identifies one cell during the scan, and thus can identify a plurality of cells, namely, the second cell and the third cell. In operation 457, the electronic device (101) can select the second PLMN and perform an operation for accessing the second cell based on the priority of the RAT supported by the second cell being higher than the priority of the RAT supported by the third cell. Accordingly, even though the electronic device (101) can maintain access to a cell of the first PLMN, it can select a second PLMN having the same or lower priority. 2. Selection of PLMN and access to a cell of the second PLMN can be performed.

[0133] FIG. 4d is a drawing for explaining an operation method of an electronic device according to one embodiment.

[0134] According to one embodiment, the electronic device (101) may perform an operation for connecting to the first cell (411) of the first PLMN (e.g., A) in operation 471. The electronic device (101) may perform a scan based on the occurrence of an event for performing a scan in operation 473. For example, the electronic device (101) may confirm the occurrence of an event, such as a failure to connect to the first cell (411), as described in FIG. 4A. Alternatively, the electronic device (101) may confirm the expiration of an H-PLMN timer (or another timer) as the occurrence of an event for performing a scan, which will be described later. Meanwhile, there is no limitation on the type and / or number of events for performing a scan. The electronic device (101) can, in operation 475, identify a second cell (e.g., cell 431 of FIG. 4B) of the second PLMN (e.g., B) and a third cell (e.g., cell 421 of FIG. 4B) of the first PLMN (e.g., A) based on the result of the scan. For example, the electronic device (101) can continuously perform the scan even if it identifies one cell during the scan, and thus can identify a plurality of cells, namely, the second cell and the third cell. In operation 477, the electronic device (101) can select the second PLMN and perform an operation for accessing the second cell based on the fact that the RAT supported by the second cell is a designated RAT (e.g., E-UTRA, NR, but there is no limitation) and the RAT supported by the third cell is not a designated RAT. Accordingly, the electronic device (101) of the first PLMN Even though the connection to the cell can be maintained, selection of a second PLMN having the same or lower priority and connection to the cell of the second PLMN can be performed.

[0135] FIG. 5A is a drawing for explaining an operation method of an electronic device according to one embodiment.

[0136] According to one embodiment, the electronic device (101) may, in operation 501, determine that access to the first cell of the first PLMN has failed. As described above, although the electronic device (101) is out of coverage of the first cell (411), handover or cell reselection may not be performed. The electronic device (101) may determine that access to the first cell has failed. The electronic device (101) may, in operation 503, perform a scan for a designated RAT. For example, if the designated RAT is E-UTRA, the electronic device (101) may perform a scan for E-UTRA, but there is no limitation. If there are multiple designated RATs, for example, a scan may be performed for a higher RAT, but there is no limitation. For example, if the specified RAT is NR and E-UTRA, the electronic device (101) may perform a scan for NR, and if a cell supporting NR is not identified, may perform a scan for E-UTRA, but there is no limitation.

[0137] In operation 505, the electronic device (101) can check whether a cell of the first PLMN is identified as a result of a scan for the designated RAT. For example, the electronic device (101) can check whether a cell of the first PLMN supporting the designated RAT exists. If a cell of the first PLMN is identified as a result of the scan for the designated RAT (operation 505 - Yes), the electronic device (101) can perform an operation for accessing the cell of the first PLMN in operation 507. The operation for accessing has been described above, and thus, the description will not be repeated here. In this case, since a cell of the first PLMN exists in the designated RAT, the electronic device (101) may not change the PLMN.

[0138] If the scan result for the designated RAT does not identify a cell of the first PLMN (Operation 505 - No), the electronic device (101) may, in operation 509, check whether a cell of the second PLMN having the same priority as the first PLMN is identified. For example, the electronic device (101) may check whether a cell of the second PLMN supporting the designated RAT exists. If a cell of the second PLMN having the same priority as the first PLMN is identified (Operation 509 - Yes), the electronic device (101) may, in operation 513, perform an operation for accessing a cell of the second PLMN. Those skilled in the art will understand that the electronic device (101) may change the PLMN from the first PLMN to the second PLMN. If a cell of the second PLMN having the same priority as the first PLMN is not identified (action 509 - No), the electronic device (101) may perform a scan for another RAT in operation 511. For example, if a cell supporting the RAT is not identified as a result of scanning E-UTRA as the designated RAT, the electronic device (101) may perform a scan for a lower RAT (e.g., UTRA).

[0139] FIG. 5b is a drawing for explaining an operation method of an electronic device according to one embodiment.

[0140] According to one embodiment, the electronic device (101) may, in operation 501, confirm a failure in connection to the first cell of the first PLMN. The electronic device (101) may, in operation 503, perform a scan for a designated RAT. The electronic device (101), in operation 505, may confirm whether a cell of the first PLMN is identified as a result of the scan for the designated RAT. For example, the electronic device (101) may confirm whether a cell of the first PLMN supporting the designated RAT exists. If a cell of the first PLMN is identified as a result of the scan for the designated RAT (operation 505 - Yes), the electronic device (101) may, in operation 507, perform an operation for connection to a cell of the first PLMN. If the scan result for the designated RAT does not identify a cell of the first PLMN (Operation 505 - No), the electronic device (101) may, in operation 519, check whether a cell of a second PLMN having a lower priority than the first PLMN is identified. For example, the electronic device (101) may check whether a cell of the second PLMN supporting the designated RAT exists. If a cell of the second PLMN having a lower priority than the first PLMN is identified (Operation 519 - Yes), the electronic device (101) may, in operation 513, perform an operation for accessing a cell of the second PLMN. Those skilled in the art will understand that the electronic device (101) may change the PLMN from the first PLMN to the second PLMN. If a cell of the second PLMN having a lower priority than the first PLMN is not identified (action 519-No), the electronic device (101) may, in operation 513, perform a scan for another RAT.

[0141] As described above, the electronic device (101) may change the PLMN when a cell supporting the designated RAT is detected in a PLMN having a lower priority than the existing PLMN. In this case, the electronic device (101) may be implemented to perform the PLMN change in response to the detection of a cell supporting the designated RAT, or may be implemented to perform the PLMN change in response to the detection of a cell supporting the designated RAT and the satisfaction of an additional condition. For example, the additional condition may be an electric field-related condition, such as a condition indicating a strong electric field, but this is exemplary and not limiting.

[0142] FIG. 6 is a drawing for explaining an operating method of an electronic device according to one embodiment.

[0143] According to one embodiment, the electronic device (101) may perform an operation for accessing a first cell of a first PLMN based on a first RAT (e.g., UTRA or GSM, but without limitation) other than a designated RAT (e.g., E-UTRA or NR, but without limitation). The electronic device (101) may perform a scan based on the expiration of a scan timer, at operation 603. For example, the electronic device (101) may initiate an HPLMN scan timer. For example, the electronic device (101) may be configured to perform a scan at a designated period (e.g., the expiration time of the scan timer) to check for the presence of a PLMN or an HPLMN with a higher priority. The electronic device (101) may identify a second cell of a second PLMN based on the result of the scan, at operation 605. In contrast to the embodiment of FIG. 4A, the electronic device (101) can identify a second cell of a second PLMN while connected to a first cell. For example, the electronic device (101) can identify a cell of a second PLMN supporting E-UTRA based on a scan result based on the expiration of an HPLMN scan timer while connected to a cell of a first PLMN supporting GSM.

[0144] The electronic device (101), in operation 607, may perform an operation for accessing a second cell of the second PLMN based on the second RAT supported by the second cell being a designated RAT. Even if the priority of the second PLMN is the same as the priority of the first PLMN or the priority of the second PLMN is lower than the priority of the first PLMN, the electronic device (101) may perform access to a cell of the second PLMN supporting the designated RAT. As described above, for example, the electronic device (101) may, while connected to a cell of the first PLMN supporting GSM, identify a cell of the second PLMN supporting E-UTRA based on a scan result based on the expiration of the HPLMN scan timer. The electronic device (101) may select the second PLMN based on the fact that the cell of the second PLMN supports a designated RAT (e.g., E-UTRA or NR, but without limitation), even if the priority of the second PLMN is the same as or lower than that of the first PLMN. The electronic device (101) may select the second PLMN and perform an operation for accessing a cell that supports the designated RAT of the second PLMN. Accordingly, the electronic device (101) may ignore the priority of the PLMN and select another PLMN if the cell of the currently selected PLMN does not support the designated RAT, but a cell of another PLMN supports the designated RAT.

[0145] FIG. 7 is a drawing for explaining an operating method of an electronic device according to one embodiment.

[0146] According to one embodiment, the electronic device (101) may perform an operation for accessing the first cell of the first PLMN in operation 701. The electronic device (101) may perform a scan based on the expiration of a timer in operation 703. For example, as described with reference to FIG. 6, the electronic device (101) may perform a scan based on the expiration of the HPLMN scan timer while accessing the first cell, but there is no limitation. The electronic device (101) may check, in operation 705, whether a cell of a second PLMN having a higher priority than the first PLMN is identified in a designated RAT. For example, the electronic device (101) may check, in E-UTRA or NR as the designated RAT, whether a cell of the second PLMN having a higher priority than the first PLMN is identified, but there is no limitation on the type and / or number of designated RATs.

[0147] In the designated RAT, if a cell of the second PLMN having a higher priority than the first PLMN is identified (Operation 705 - Yes), the electronic device (101) can change the PLMN from the first PLMN to the second PLMN in operation 707. In the designated RAT, if a cell of the second PLMN having a higher priority than the first PLMN is not identified (Operation 705 - No), the electronic device (101) can check whether the first cell supports the designated RAT in operation 709. For example, the electronic device (101) can check whether the first cell supports E-UTRA or NR as the designated RAT, but there is no limitation on the designated RAT. If the first cell supports the designated RAT (Operation 709 - Yes), the electronic device (101) can maintain the connection to the first cell in operation 711. Even if a cell of another PLMN with the same or lower priority supports the designated RAT, if the first cell currently connected supports the designated RAT, the electronic device (101) can maintain the connection to the first cell. If the first cell supports the designated RAT (Operation 709 - No), the electronic device (101) can check, in operation 713, whether a cell of a third PLMN with the same or lower priority as the first PLMN is identified in the designated RAT. If a cell of the third PLMN with the same or lower priority as the first PLMN is identified (Operation 713 - Yes), the electronic device (101) can change the PLMN from the first PLMN to the third PLMN in operation 707. If a cell of another PLMN with the same or lower priority supports the designated RAT, and the first cell currently connected does not support the designated RAT, the electronic device (101) can use the designated RAT by changing the PLMN.If a cell of a third PLMN having the same or lower priority as the first PLMN is not identified (action 713 - No), the electronic device (101) may maintain access to the first cell in operation 711. The electronic device (101) may refrain from changing to the PLMN if a cell of another PLMN having the same or lower priority does not support the specified RAT.

[0148] FIG. 8 is a drawing for explaining an operating method of an electronic device according to one embodiment.

[0149] According to one embodiment, the electronic device (101) may perform an operation for accessing a first cell of a first PLMN based on a first RAT in operation 801. In operation 803, the electronic device (101) may initiate a timer having an expiration time smaller than the expiration time of an HPLMN scan timer based on the first RAT being a RAT for which a rapid scan is requested. For example, the RAT for which a rapid scan is requested may be GSM or UTRA, but there is no limitation on its type and / or number. The HPLMN scan timer may be determined according to the operator's policy and may be set to, for example, 1 hour. In this case, the electronic device (101) may access a cell of a RAT that supports relatively low communication quality compared to the designated RAT for 1 hour. Accordingly, the electronic device (101) may perform a scan based on the expiration of a timer having an expiration time smaller than the HPLMN scan timer, if the RAT supported by the currently connected cell is the RAT for which a rapid scan is requested. The timer may be reset, for example, based on confirmation of movement of the electronic device (101), but there is no limitation. The movement of the electronic device (101) may be confirmed, for example, based on a change in TA, a change in cell, a change in electric field, a change in GPS coordinates, and / or a sensing value of a motion sensor, but there is no limitation on the method of confirmation. The electronic device (101) may perform a scan based on the expiration of the timer in operation 805. The electronic device (101) may, based on the result of the scan, confirm the second cell of the second PLMN in operation 807. The electronic device (101) may perform an operation for accessing the second cell of the second PLMN based on the second RAT supported by the second cell being the designated RAT in operation 809.For example, the electronic device (101) may perform an operation for accessing a second cell of a second PLMN, even though the priority of the second PLMN is less than or equal to the priority of the first PLMN, based on the fact that the second RAT supported by the second cell is a designated RAT (e.g., E-UTRA or NR, but without limitation). As described above, when the electronic device (101) accesses a cell of a relatively low-quality RAT, it may access a cell supporting a designated RAT of an equal or lower-quality PLMN before the HPLMN scan timer expires.

[0150] FIG. 9 is a drawing for explaining the operation of an electronic device according to one embodiment.

[0151] According to one embodiment, the electronic device (101) may provide a screen (910) related to PLMN selection. The screen (910) may include a portion (911) that allows automatic selection or manual selection to be selected. When a toggler included in the portion (911) is in a first state, the electronic device (101) may be configured to select a PLMN based on user input. When the toggler included in the portion (911) is in a second state, the electronic device (101) may be configured to automatically select a PLMN rather than based on user input. The screen (910) may include a portion (912) that allows determining whether to select a PLMN that supports a specified RAT. When the toggler included in the portion (912) is in the first state, the electronic device (101) may be configured to select a PLMN in compliance with priorities, regardless of whether the specified RAT is supported. When the toggle included in the portion (912) is in the second state, the electronic device (101) can select a PLMN having the same priority if the cell of the PLMN having the same priority supports the designated RAT, and if the cell of the PLMN currently in use does not support the designated RAT.

[0152] FIG. 10 is a drawing for explaining an operating method of an electronic device according to one embodiment.

[0153] According to one embodiment, the electronic device (101) may perform an operation for accessing a first cell of a first PLMN based on a first RAT in operation 1001. The electronic device (101) may perform a scan based on confirming the occurrence of a scan event in operation 1003. For example, the electronic device (101) may perform a scan based on confirming a failure of accessing a first cell of the first PLMN as a scan event. For example, the electronic device (101) may perform a scan based on confirming the expiration of an HPLMN scan timer as a scan event while accessing the first cell of the first PLMN. For example, the electronic device (101) may perform a scan based on identifying the expiration of a timer with an expiration period shorter than the HPLMN scan timer as a scan event, provided that the first cell supports a RAT requiring a rapid scan (e.g., GSM or UTRA, but without limitation). Meanwhile, the above-described scan event is exemplary, and there is no limitation on the type of scan event.

[0154] In operation 1005, the electronic device (101) can identify a second cell of a second PLMN different from the first PLMN based on the scan results. The priority of the second cell of the second PLMN can be, for example, the same as or lower than the priority of the first PLMN. In operation 1007, the electronic device (101) can perform an operation for accessing the second cell of the second PLMN based on the second RAT supported by the second cell.

[0155] For example, the electronic device (101) may perform a scan based on identifying a failure of connection to a first cell of a PLMN as a scan event, as described with reference to FIGS. 4A, 4B, 5A, and / or 5B. In this case, the electronic device (101) may perform an operation for connection to a second cell of a second PLMN based on the second RAT supported by the second cell being a designated RAT and the cell supporting the designated RAT of the first PLMN not being identified.

[0156] For example, the electronic device (101) may perform a scan based on identifying the expiration of the HPLMN scan timer as a scan event while connected to the first cell of the first PLMN, as described with reference to FIGS. 6 and / or 7. For example, the electronic device (101) may perform an operation for connecting to the second cell of the second PLMN based on the second RAT supported by the second cell being the designated RAT and the RAT of the currently connected first cell being not the designated RAT.

[0157] For example, the electronic device (101) may perform a scan based on identifying the expiration of a timer having an expiration time smaller than the HPLMN scan timer as a scan event while connected to the first cell of the first PLMN, as described with reference to FIG. 8. For example, the electronic device (101) may perform an operation for connecting to the second cell of the second PLMN based on the fact that the second RAT supported by the second cell is the designated RAT and the RAT of the currently connected first cell is not the designated RAT.

[0158] According to one embodiment of the present disclosure, an electronic device (101) may include one or more processors (120; 212, 214; 260) including processing circuitry.

[0159] According to one embodiment of the present disclosure, an electronic device (101) may include a memory (130) that stores instructions.

[0160] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform an operation for accessing a first cell of a first V-PLMN (visited-public land mobile network).

[0161] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan based on determining the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0162] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify, based on the results of the scan, a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN and a third cell supporting the second RAT of the first V-PLMN.

[0163] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0164] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to select the second V-PLMN and perform an operation for connection of the second V-PLMN to the second cell based on the first RAT supported by the second cell being a designated RAT and the second RAT supported by the third cell being not the designated RAT.

[0165] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to, after connecting to the first cell by performing an operation for connecting to the first cell, identify a failure of connection to the first cell as the occurrence of the event for performing the scan.

[0166] According to one embodiment of the present disclosure, the priority of the designated RAT may be higher than the priority of any other RAT other than the designated RAT.

[0167] According to one embodiment of the present disclosure, in a state where it is possible to maintain connection to the first V-PLMN, an operation for connection to the second cell of the second V-PLMN having a priority equal to or lower than that of the first V-PLMN can be performed.

[0168] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the second cell of the first V-PLMN and the third cell of the first V-PLMN to identify a fourth cell supporting the designated RAT of a third V-PLMN.

[0169] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause, as at least part of the operation of selecting the second V-PLMN, to select the second V-PLMN having a higher priority than a priority of the third V-PLMN, based on the second cell of the second V-PLMN and the fourth cell of the third V-PLMN supporting the designated RAT.

[0170] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify the expiration of the H-PLMN timer as the occurrence of the event while connected to the first cell.

[0171] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify the fifth cell of the second V-PLMN based on performing a scan based on expiration of the H-PLMN timer.

[0172] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to select the second V-PLMN and perform an operation for accessing the fifth cell based on the RAT supported by the fifth cell being the designated RAT and the RAT supported by the first cell being not the designated RAT.

[0173] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to, when connected to the first cell, identify the expiration of a timer having an expiration time smaller than an expiration time of an H-PLMN timer as the occurrence of the event, based on the RAT supported by the first cell being not the designated RAT.

[0174] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify the sixth cell of the second V-PLMN according to a scan based on expiration of the timer.

[0175] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to select the second V-PLMN and perform an operation for accessing the sixth cell based on the RAT supported by the sixth cell being the designated RAT and the RAT supported by the first cell being not the designated RAT.

[0176] According to one embodiment of the present disclosure, a storage medium storing computer-readable instructions may be provided.

[0177] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260) comprising processing circuitry of the electronic device (101), may cause the electronic device (101) to perform an operation for accessing a first cell of a first visited-public land mobile network (V-PLMN).

[0178] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan based on determining the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0179] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify, based on the results of the scan, a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN and a third cell supporting the second RAT of the first V-PLMN.

[0180] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0181] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to select the second V-PLMN and perform an operation for connection of the second V-PLMN to the second cell based on the first RAT supported by the second cell being a designated RAT and the second RAT supported by the third cell being not the designated RAT.

[0182] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to, after connecting to the first cell by performing an operation for connecting to the first cell, identify a failure of connection to the first cell as the occurrence of the event for performing the scan.

[0183] According to one embodiment of the present disclosure, the priority of the designated RAT may be higher than the priority of any other RAT other than the designated RAT.

[0184] According to one embodiment of the present disclosure, in a state where it is possible to maintain connection to the first V-PLMN, an operation for connection to the second cell of the second V-PLMN having a priority equal to or lower than that of the first V-PLMN can be performed.

[0185] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the second cell of the first V-PLMN and the third cell of the first V-PLMN to identify a fourth cell supporting the designated RAT of a third V-PLMN.

[0186] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause, as at least part of the operation of selecting the second V-PLMN, to select the second V-PLMN having a higher priority than a priority of the third V-PLMN, based on the second cell of the second V-PLMN and the fourth cell of the third V-PLMN supporting the designated RAT.

[0187] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify the expiration of the H-PLMN timer as the occurrence of the event while connected to the first cell.

[0188] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify the fifth cell of the second V-PLMN based on performing a scan based on expiration of the H-PLMN timer.

[0189] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to select the second V-PLMN and perform an operation for accessing the fifth cell based on the RAT supported by the fifth cell being the designated RAT and the RAT supported by the first cell being not the designated RAT.

[0190] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to, when connected to the first cell, identify the expiration of a timer having an expiration time smaller than an expiration time of an H-PLMN timer as the occurrence of the event, based on the RAT supported by the first cell being not the designated RAT.

[0191] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify the sixth cell of the second V-PLMN according to a scan based on expiration of the timer.

[0192] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to select the second V-PLMN and perform an operation for accessing the sixth cell based on the RAT supported by the sixth cell being the designated RAT and the RAT supported by the first cell being not the designated RAT.

[0193] According to one embodiment of the present disclosure, a method of operating an electronic device (101) may include performing an operation for connecting to a first cell of a first V-PLMN (visited-public land mobile network).

[0194] According to one embodiment of the present disclosure, the operating method of the electronic device (101) may include an operation of performing a scan based on confirming the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0195] According to one embodiment of the present disclosure, the method of operating the electronic device (101) may include an operation of identifying a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN and a third cell supporting the second RAT of the first V-PLMN, based on a result of the scan.

[0196] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0197] According to one embodiment of the present disclosure, the operating method of the electronic device (101) may include an operation of selecting the second V-PLMN and performing an operation for connection of the second V-PLMN to the second cell based on the first RAT supported by the second cell being a designated RAT and the second RAT supported by the third cell being not the designated RAT.

[0198] According to one embodiment of the present disclosure, an electronic device (101) may include one or more processors (120; 212, 214; 260) including processing circuitry.

[0199] According to one embodiment of the present disclosure, the electronic device (101) may include a memory (130) that stores instructions.

[0200] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform an operation for accessing a first cell of a first V-PLMN (visited-public land mobile network).

[0201] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan based on determining the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0202] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN, based on the results of the scan.

[0203] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0204] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to stop performing an additional scan to identify a cell of the first V-PLMN, select the second V-PLMN, and perform an operation for connecting the second V-PLMN to the second cell based on the first RAT supported by the second cell being a designated RAT.

[0205] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to, after connecting to the first cell by performing an operation for connecting to the first cell, identify a failure of connection to the first cell as the occurrence of the event for performing the scan.

[0206] According to one embodiment of the present disclosure, the priority of the designated RAT may be higher than the priority of any other RAT other than the designated RAT.

[0207] According to one embodiment of the present disclosure, in a state where the inability to access the first V-PLMN is not confirmed, an operation for accessing the second cell of the second V-PLMN having a higher priority may be performed.

[0208] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the second cell of the first V-PLMN and the third cell of the first V-PLMN to identify a fourth cell supporting the designated RAT of a third V-PLMN.

[0209] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause, as at least part of the operation of selecting the second V-PLMN, to select the second V-PLMN having a higher priority than a priority of the third V-PLMN, based on the second cell of the second V-PLMN and the fourth cell of the third V-PLMN supporting the designated RAT.

[0210] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify the expiration of the H-PLMN timer as the occurrence of the event while connected to the first cell.

[0211] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify the fifth cell of the second V-PLMN based on performing a scan based on expiration of the H-PLMN timer.

[0212] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to select the second V-PLMN and perform an operation for accessing the fifth cell based on the RAT supported by the fifth cell being the designated RAT and the RAT supported by the first cell being not the designated RAT.

[0213] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to, when connected to the first cell, identify the expiration of a timer having an expiration time smaller than an expiration time of an H-PLMN timer as the occurrence of the event, based on the RAT supported by the first cell being not the designated RAT.

[0214] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify the sixth cell of the second V-PLMN according to a scan based on expiration of the timer.

[0215] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to select the second V-PLMN and perform an operation for accessing the sixth cell based on the RAT supported by the sixth cell being the designated RAT and the RAT supported by the first cell being not the designated RAT.

[0216] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan for the designated RAT as at least part of an operation of performing the scan after connecting to the first cell in accordance with the performance of an operation for connecting to the first cell.

[0217] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan for another RAT different from the designated RAT based on a failure to verify a cell supporting the designated RAT based on the scan result.

[0218] According to one embodiment of the present disclosure, a storage medium storing computer-readable instructions may be provided.

[0219] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260) comprising processing circuitry of the electronic device (101), may cause the electronic device (101) to perform an operation for accessing a first cell of a first visited-public land mobile network (V-PLMN).

[0220] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260) of the electronic device (101), may cause the electronic device (101) to perform a scan based on determining the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0221] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260) of the electronic device (101), may cause the electronic device (101) to identify a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN, based on the results of the scan.

[0222] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0223] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260) of the electronic device (101), may cause the electronic device (101) to stop performing an additional scan to identify a cell of the first V-PLMN, select the second V-PLMN, and perform an operation for connecting the second V-PLMN to the second cell based on the first RAT supported by the second cell being a designated RAT.

[0224] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to, after connecting to the first cell by performing an operation for connecting to the first cell, identify a failure of connection to the first cell as the occurrence of the event for performing the scan.

[0225] According to one embodiment of the present disclosure, a method of operating an electronic device (101) may include performing an operation for connecting to a first cell of a first V-PLMN (visited-public land mobile network).

[0226] According to one embodiment of the present disclosure, the operating method of the electronic device (101) may include an operation of performing a scan based on confirming the occurrence of an event for performing a scan after connecting to the first cell according to the performance of an operation for connecting to the first cell.

[0227] According to one embodiment of the present disclosure, the method of operating the electronic device (101) may include an operation of identifying a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN, based on the result of the scan.

[0228] According to one embodiment of the present disclosure, the priority of the second V-PLMN may be less than or equal to the priority of the first V-PLMN.

[0229] According to one embodiment of the present disclosure, the method of operating the electronic device (101) may include an operation of stopping an additional scan for identifying a cell of the first V-PLMN, selecting the second V-PLMN, and performing an operation for connecting the second V-PLMN to the second cell, based on the first RAT supported by the second cell being a designated RAT.

[0230] According to one embodiment of the present disclosure, an electronic device (101) may include one or more processors (120; 212, 214; 260) including processing circuitry and a memory (130) storing instructions.

[0231] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform an operation for connecting to a first cell of a first PLMN.

[0232] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan based on determining a failure of connection to the first cell after connecting to the first cell by performing an operation for connecting to the first cell.

[0233] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify a second cell of a second PLMN different from the first PLMN based on the results of the scan.

[0234] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform an operation for accessing the second cell of the second PLMN based on a failure to verify that the RAT supported by the second cell is a designated RAT and a cell supporting the designated RAT of the first PLMN as a result of the scan.

[0235] According to one embodiment of the present disclosure, the first PLMN and the second PLMN may be V-PLMNs.

[0236] According to one embodiment of the present disclosure, the priority of the first PLMN may be the same as the priority of the second PLMN.

[0237] According to one embodiment of the present disclosure, the priority of the first PLMN may be higher than the priority of the second PLMN.

[0238] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may further cause the electronic device (101) to perform an operation for accessing the identified cell based on the identification of a cell supporting the designated RAT of the first PLMN based on the scan result.

[0239] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan for the designated RAT, at least as part of an operation of performing a scan based on determining a failure of connection to the first cell.

[0240] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may further cause the electronic device (101) to perform a scan for another RAT different from the designated RAT based on a failure to verify a cell supporting the designated RAT based on the scan result.

[0241] According to one embodiment of the present disclosure, a storage medium storing computer-readable instructions may be provided.

[0242] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260) comprising processing circuitry of the electronic device (101), may cause the electronic device (101) to perform an operation for connecting to a first cell of a first PLMN.

[0243] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan based on determining a failure of connection to the first cell after connecting to the first cell by performing an operation for connecting to the first cell.

[0244] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify a second cell of a second PLMN different from the first PLMN based on the results of the scan.

[0245] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform an operation for accessing the second cell of the second PLMN based on a failure to verify that the RAT supported by the second cell is a designated RAT and a cell supporting the designated RAT of the first PLMN as a result of the scan.

[0246] According to one embodiment of the present disclosure, the first PLMN and the second PLMN may be V-PLMNs.

[0247] According to one embodiment of the present disclosure, the priority of the first PLMN may be the same as the priority of the second PLMN.

[0248] According to one embodiment of the present disclosure, the priority of the first PLMN may be higher than the priority of the second PLMN.

[0249] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may further cause the electronic device (101) to perform an operation for accessing the identified cell based on the identification of a cell supporting the designated RAT of the first PLMN based on the scan result.

[0250] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan for the designated RAT, at least as part of an operation of performing a scan based on determining a failure of connection to the first cell.

[0251] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may further cause the electronic device (101) to perform a scan for another RAT different from the designated RAT based on a failure to verify a cell supporting the designated RAT based on the scan result.

[0252] According to one embodiment of the present disclosure, a method of operating an electronic device (101) may include an operation of performing an operation for connection to a first cell of a first PLMN.

[0253] According to one embodiment of the present disclosure, the method of operating the electronic device (101) may include an operation of performing a scan based on confirming a failure of connection to the first cell after connecting to the first cell according to performing an operation for connection to the first cell.

[0254] According to one embodiment of the present disclosure, the method of operating the electronic device (101) may include an operation of identifying a second cell of a second PLMN different from the first PLMN based on the result of the scan.

[0255] According to one embodiment of the present disclosure, the operating method of the electronic device (101) may include an operation for performing an operation for accessing the second cell of the second PLMN based on a failure to confirm a cell supporting the designated RAT of the first PLMN based on a result of the scan, wherein the RAT supported by the second cell is a designated RAT.

[0256] According to one embodiment of the present disclosure, the first PLMN and the second PLMN may be V-PLMNs.

[0257] According to one embodiment of the present disclosure, the priority of the first PLMN may be the same as the priority of the second PLMN.

[0258] According to one embodiment of the present disclosure, the priority of the first PLMN may be higher than the priority of the second PLMN.

[0259] According to one embodiment of the present disclosure, the operating method of the electronic device (101) may include an operation of performing an operation for connection to the identified cell based on the identification of a cell supporting the designated RAT of the first PLMN based on the scan result.

[0260] According to one embodiment of the present disclosure, an electronic device (101) may include one or more processors (120; 212, 214; 260) including processing circuitry and a memory (130) storing instructions.

[0261] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform an operation for accessing a first cell of a first PLMN based on a first radio access technology (RAT).

[0262] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan based on the detection of an occurrence of a scan event.

[0263] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify a second cell of a second PLMN different from the first PLMN based on the results of the scan.

[0264] According to one embodiment of the present disclosure, the priority of the second PLMN may be equal to or less than the priority of the first PLMN.

[0265] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform an operation for accessing the second cell of the second PLMN based on a second RAT supported by the second cell.

[0266] According to one embodiment of the present disclosure, a storage medium storing computer-readable instructions may be provided.

[0267] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260) of the electronic device (101), may cause the electronic device (101) to perform an operation for accessing a first cell of a first PLMN based on a first radio access technology (RAT).

[0268] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan based on the detection of an occurrence of a scan event.

[0269] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify a second cell of a second PLMN different from the first PLMN based on the results of the scan.

[0270] According to one embodiment of the present disclosure, the priority of the second PLMN may be equal to or less than the priority of the first PLMN.

[0271] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform an operation for accessing the second cell of the second PLMN based on a second RAT supported by the second cell.

[0272] According to one embodiment of the present disclosure, a method of operating an electronic device (101) may include performing an operation for accessing a first cell of a first PLMN based on a first radio access technology (RAT).

[0273] According to one embodiment of the present disclosure, the operating method of the electronic device (101) may include an operation of performing a scan based on confirming the occurrence of a scan event.

[0274] According to one embodiment of the present disclosure, the method of operating the electronic device (101) may include an operation of identifying a second cell of a second PLMN different from the first PLMN based on the result of the scan.

[0275] According to one embodiment of the present disclosure, the priority of the second PLMN may be equal to or less than the priority of the first PLMN.

[0276] According to one embodiment of the present disclosure, the method of operating the electronic device (101) may include performing an operation for connecting to the second cell of the second PLMN based on a second RAT supported by the second cell.

[0277] According to one embodiment of the present disclosure, an electronic device (101) may include one or more processors (120; 212, 214; 260) including processing circuitry and a memory (130) storing instructions.

[0278] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform an operation for accessing a first cell of a first PLMN based on a first radio access technology (RAT).

[0279] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan based on the expiration of a timer while connected to a first cell.

[0280] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify a second cell of a second PLMN different from the first PLMN based on the results of the scan.

[0281] According to one embodiment of the present disclosure, the priority of the second PLMN may be equal to or less than the priority of the first PLMN.

[0282] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform an operation for accessing the second cell of the second PLMN based on the second RAT supported by the second cell being a designated RAT and the RAT supported by the first cell being not the designated RAT.

[0283] According to one embodiment of the present disclosure, a storage medium storing computer-readable instructions may be provided.

[0284] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260) comprising processing circuitry of the electronic device (101), may cause the electronic device (101) to perform an operation for accessing a first cell of a first PLMN based on a first radio access technology (RAT).

[0285] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform a scan based on the expiration of a timer while connected to a first cell.

[0286] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to identify a second cell of a second PLMN different from the first PLMN based on the results of the scan.

[0287] According to one embodiment of the present disclosure, the priority of the second PLMN may be equal to or less than the priority of the first PLMN.

[0288] According to one embodiment of the present disclosure, the instructions, when individually or collectively executed by the one or more processors (120; 212, 214; 260), may cause the electronic device (101) to perform an operation for accessing the second cell of the second PLMN based on the second RAT supported by the second cell being a designated RAT and the RAT supported by the first cell being not the designated RAT.

[0289] According to one embodiment of the present disclosure, a method of operating an electronic device (101) may include performing an operation for accessing a first cell of a first PLMN based on a first radio access technology (RAT).

[0290] According to one embodiment of the present disclosure, the method of operating the electronic device (101) may include an operation of performing a scan based on the expiration of a timer while connected to a first cell.

[0291] According to one embodiment of the present disclosure, the method of operating the electronic device (101) may include an operation of identifying a second cell of a second PLMN different from the first PLMN based on a result of a scan.

[0292] According to one embodiment of the present disclosure, the priority of the second PLMN may be equal to or less than the priority of the first PLMN.

[0293] According to one embodiment of the present disclosure, the method of operating the electronic device (101) may include performing an operation for connection to the second cell of the second PLMN based on the second RAT supported by the second cell being a designated RAT and the RAT supported by the first cell being not the designated RAT.

[0294] Electronic devices according to the embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments disclosed in this document are not limited to the aforementioned devices.

[0295] The embodiments of this document and the terminology used herein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0296] The term "module" used in the embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0297] One embodiment of the present document may be implemented as software (e.g., a program (140)) including one or more instructions stored in a storage medium (e.g., an internal memory (136) or an external memory (138)) readable by a machine (e.g., an electronic device (101)). For example, a processor (e.g., a processor (120)) of the machine (e.g., an electronic device (101)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0298] According to one embodiment, the method according to one embodiment disclosed in the present document may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play Store™) or directly between two user devices (e.g., smart phones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0299] According to one embodiment, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and arranged in other components. According to one embodiment, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to one embodiment, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In an electronic device (101), One or more processors (120; 212, 214; 260) comprising processing circuitry; and Memory (130) that stores instructions Including, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), cause the electronic device (101) to: Performs an operation for accessing the first cell of the first V-PLMN (visited-public land mobile network), After connecting to the first cell, based on the performance of an operation for connecting to the first cell, a scan is performed based on the occurrence of an event for performing a scan, Based on the result of the above scan, a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN and a third cell supporting a second RAT of the first V-PLMN are identified, wherein a priority of the second V-PLMN is less than or equal to a priority of the first V-PLMN, An electronic device (101) that selects the second V-PLMN and causes the second V-PLMN to perform an operation for connecting to the second cell based on the first RAT supported by the second cell being a designated RAT and the second RAT supported by the third cell being not the designated RAT.

2. In paragraph 1, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), cause the electronic device (101) to: An electronic device (101) that causes a confirmation of failure of connection to the first cell after connection to the first cell is made by performing an operation for connection to the first cell, as the occurrence of the event for performing the scan.

3. In any one of paragraphs 1 and 2, The priority of the above-mentioned RAT is higher than the priority of any other RAT other than the above-mentioned RAT, An electronic device (101) that performs an operation for connection to the second cell of the second V-PLMN having a priority equal to or lower than that of the first V-PLMN, while maintaining connection to the first V-PLMN.

4. In any one of paragraphs 1 to 3, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), cause the electronic device (101) to: Based on the results of said scan, at least as a part of the operation of identifying a second cell supporting a first RAT of a second V-PLMN different from said first V-PLMN and a third cell supporting a second RAT of said first V-PLMN, identifying a fourth cell supporting the designated RAT of a third V-PLMN together with said second cell of said first V-PLMN and said third cell of said first V-PLMN, An electronic device (101) that causes the second V-PLMN to be selected, at least as a part of the operation of selecting the second V-PLMN, based on the RAT supported by the second cell of the second V-PLMN and the fourth cell of the third V-PLMN being the designated RAT.

5. In any one of paragraphs 1 to 4, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), cause the electronic device (101) to: While connected to the first cell, the expiration of the H-PLMN timer is confirmed as the occurrence of the event, Based on performing a scan based on the expiration of the above H-PLMN timer, the fifth cell of the second V-PLMN is identified, An electronic device that causes the second V-PLMN to be selected and to perform an operation for connection to the fifth cell based on the fact that the RAT supported by the fifth cell is the designated RAT and the RAT supported by the first cell is not the designated RAT.

6. In any one of paragraphs 1 to 5, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), cause the electronic device (101) to: While connected to the first cell, based on the fact that the RAT supported by the first cell is not the designated RAT, the expiration of a timer having an expiration time smaller than the expiration time of the H-PLMN timer is confirmed as the occurrence of the event. Based on the scan upon expiration of the above timer, the 6th cell of the 2nd V-PLMN is identified, An electronic device (101) that causes the second V-PLMN to be selected and to perform an operation for connection to the sixth cell based on the fact that the RAT supported by the sixth cell is the designated RAT and the RAT supported by the first cell is not the designated RAT.

7. In a storage medium that stores instructions that can be read by a computer, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260) comprising processing circuitry of the electronic device (101), cause the electronic device (101) to: Performs an operation for accessing the first cell of the first V-PLMN (visited-public land mobile network), After connecting to the first cell, based on the performance of an operation for connecting to the first cell, a scan is performed based on the occurrence of an event for performing a scan, Based on the result of the above scan, a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN and a third cell supporting a second RAT of the first V-PLMN are identified, wherein a priority of the second V-PLMN is less than or equal to a priority of the first V-PLMN, A storage medium that causes the second V-PLMN to be selected and an operation for connection of the second V-PLMN to the second cell is performed based on the first RAT supported by the second cell being a designated RAT and the second RAT supported by the third cell being not the designated RAT.

8. In paragraph 7, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), cause the electronic device (101) to: A storage medium that causes confirmation of failure of connection to the first cell after connection to the first cell is performed according to the performance of an operation for connection to the first cell, as the occurrence of the event for performing the scan.

9. In any one of paragraphs 7 to 8, The priority of the above-mentioned RAT is higher than the priority of any other RAT other than the above-mentioned RAT, A storage medium in which an operation for connection to the second cell of the second V-PLMN having a priority equal to or lower than that of the first V-PLMN is performed while maintaining connection to the first V-PLMN.

10. In any one of paragraphs 7 to 9, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), cause the electronic device (101) to: Based on the results of said scan, at least as a part of the operation of identifying a second cell supporting a first RAT of a second V-PLMN different from said first V-PLMN and a third cell supporting a second RAT of said first V-PLMN, identifying a fourth cell supporting the designated RAT of a third V-PLMN together with said second cell of said first V-PLMN and said third cell of said first V-PLMN, A storage medium that causes selection of the second V-PLMN, at least as a part of the operation of selecting the second V-PLMN, based on the RAT supported by the second cell of the second V-PLMN and the fourth cell of the third V-PLMN being the designated RAT, to select the second V-PLMN having a higher priority than the priority of the third V-PLMN.

11. In any one of paragraphs 7 to 10, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), cause the electronic device (101) to: While connected to the first cell, the expiration of the H-PLMN timer is confirmed as the occurrence of the event, Based on performing a scan based on the expiration of the above H-PLMN timer, the fifth cell of the second V-PLMN is identified, A storage medium that causes the second V-PLMN to be selected and an operation for connection to the fifth cell to be performed based on the fact that the RAT supported by the fifth cell is the designated RAT and the RAT supported by the first cell is not the designated RAT.

12. In any one of paragraphs 7 to 11, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), cause the electronic device (101) to: While connected to the first cell, based on the fact that the RAT supported by the first cell is not the designated RAT, the expiration of a timer having an expiration time smaller than the expiration time of the H-PLMN timer is confirmed as the occurrence of the event. Based on the scan upon expiration of the above timer, the 6th cell of the 2nd V-PLMN is identified, A storage medium that causes the second V-PLMN to be selected and an operation for connection to the sixth cell to be performed based on the fact that the RAT supported by the sixth cell is the designated RAT and the RAT supported by the first cell is not the designated RAT.

13. In the electronic device (101), One or more processors (120; 212, 214; 260) comprising processing circuitry; and Includes a memory (130) that stores instructions, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), cause the electronic device (101) to: Performs an operation for accessing the first cell of the first V-PLMN (visited-public land mobile network), After connecting to the first cell, based on the performance of an operation for connecting to the first cell, a scan is performed based on the occurrence of an event for performing a scan, Based on the result of the above scan, a second cell supporting a first radio access technology (RAT) of a second V-PLMN different from the first V-PLMN is identified, wherein a priority of the second V-PLMN is less than or equal to a priority of the first V-PLMN, An electronic device (101) that causes the second V-PLMN to stop performing an additional scan to identify a cell based on the first RAT supported by the second cell being a designated RAT, select the second V-PLMN, and perform an operation for connecting the second V-PLMN to the second cell.

14. In paragraph 13, The above instructions, when individually or collectively executed by one or more processors (120; 212, 214; 260), cause the electronic device (101) to: An electronic device (101) that causes a confirmation of failure of connection to the first cell after connection to the first cell is made by performing an operation for connection to the first cell, as the occurrence of the event for performing the scan.

15. In any one of paragraphs 13 to 14, The priority of the above-mentioned RAT is higher than the priority of any other RAT other than the above-mentioned RAT, An electronic device (101) that performs an operation for connection to the second cell of the second V-PLMN having a higher priority when the connection to the first V-PLMN is not confirmed.

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