WO2026010222A1 - Electronic device for performing wireless communication, and operating method thereof - Google Patents

Abstract

One embodiment of the present disclosure relates to a device and a method for transmitting an uplink reference signal in an electronic device. The electronic device can include: a communication circuit for supporting a first bandwidth related to reduced capability and a second bandwidth greater than the first bandwidth; a processor; and a memory for storing instructions, such that when executed by the processor, the instructions instruct the electronic device to: identify whether a cell that does not support the reduced capability is present if a cell that supports the reduced capability is not retrieved through cell search; set the bandwidth of the electronic device to the second bandwidth if the cell that does not support the reduced capability is present; and, in response to the setting to the second bandwidth, access, through the communication circuit, the cell that does not support the reduced capability. Other embodiments are also possible.

Description

Electronic device for performing wireless communication and method of operation thereof

Embodiments of the present disclosure relate to an electronic device for performing wireless communication and a method of operating the same.

To meet the increasing demand for wireless data traffic since the commercialization of 4G communication systems, efforts are being made to develop 5G communication systems. For this reason, 5G communication systems are also referred to as "beyond 4G networks" or "post-LTE" communication systems. To achieve relatively high data throughput, 5G communication systems are being considered for implementation in sub-6 GHz bands (e.g., approximately 3.5 GHz bands) or higher frequency bands (e.g., approximately 28 GHz or 39 GHz bands). To mitigate radio path loss and increase transmission range, beamforming, massive MIMO (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large-scale antenna technologies are being discussed for 5G communication systems.

The above information may be provided as background information to aid in understanding this document. None of the above is claimed to be prior art related to this document or can be used to determine prior art.

5G communication systems can support relatively high throughput and relatively low delay (or latency) through relatively wide frequency bandwidth.

5G communication systems may support reduced capability (redcap) for electronic devices that do not require relatively high throughput and/or relatively low latency, such as the Internet of Things (IoT) or wearable devices.

Electronic devices with reduced capabilities may be restricted from accessing cells that do not support reduced capabilities. Because the available cells for electronic devices with reduced capabilities are limited to those supporting reduced capabilities, their mobility may be limited.

Embodiments of the present disclosure disclose devices and methods for improving mobility in electronic devices with reduced capabilities.

The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present disclosure belongs from the description below.

According to one embodiment, an electronic device may include at least one processor and memory, including communication circuitry and processing circuitry that support a first bandwidth associated with reduced capability (redcap) and a second bandwidth greater than the first bandwidth. According to one embodiment, the memory may store instructions that, when individually or collectively executed by the at least one processor, cause the electronic device to determine, through a cell search, whether a cell supporting the reduced capability exists. According to one embodiment, the memory may store instructions that, when individually or collectively executed by the at least one processor, cause the electronic device to determine, if no cell supporting the reduced capability exists, whether a cell not supporting the reduced capability exists. According to one embodiment, the memory may store instructions that, when individually or collectively executed by the at least one processor, cause the electronic device to set a bandwidth of the electronic device to a second bandwidth if a cell not supporting the reduced capability exists. According to one embodiment, the memory may store instructions that, when executed individually or collectively by at least one processor, cause the electronic device to access a cell that does not support a reduced capability in response to a setting to a second bandwidth.

According to one embodiment, a method of operating an electronic device may include an operation of determining whether a cell supporting reduced capability (redcap) exists through a cell search using a communication circuit that supports a first bandwidth associated with reduced capability and a second bandwidth greater than the first bandwidth. According to one embodiment, the method of operating the electronic device may include an operation of determining whether a cell that does not support the reduced capability exists if no cell supporting the reduced capability exists. According to one embodiment, the method of operating the electronic device may include an operation of setting a bandwidth of the electronic device to the second bandwidth if a cell that does not support the reduced capability exists. According to one embodiment, the method of operating the electronic device may include an operation of connecting to a cell that does not support the reduced capability in response to the setting to the second bandwidth.

According to one embodiment, a non-transitory computer-readable storage medium (or a computer program product) storing one or more programs may be described. According to one embodiment, the one or more programs may include instructions that, when executed by at least one processor of an electronic device, cause the electronic device to perform an operation of performing a cell search using a communication circuit that supports a first bandwidth associated with a reduced capability (redcap) and a second bandwidth greater than the first bandwidth, to determine whether a cell supporting the reduced capability exists, if no cell supporting the reduced capability exists, to determine whether a cell that does not support the reduced capability exists, and if a cell that does not support the reduced capability exists, to set a bandwidth of the electronic device to the second bandwidth, and in response to setting to the second bandwidth, to connect to a cell that does not support the reduced capability.

According to an exemplary embodiment of the present disclosure, an electronic device with reduced capability (redcap) can access a cell supporting reduced capability and a cell not supporting reduced capability by selectively using a first frequency bandwidth corresponding to the reduced capability or a second frequency bandwidth different from the first frequency bandwidth.

According to one embodiment, by selectively using a reduced capability function in an electronic device that supports a first frequency bandwidth corresponding to the reduced capability or a second frequency bandwidth different from the first frequency bandwidth, heat generation or battery consumption of the electronic device can be reduced.

In addition, various effects may be provided directly or indirectly through this document.

The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure belongs from the description below.

In connection with the description of the drawings, the same or similar reference numerals may be used for identical or similar components.

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

FIG. 2 is a block diagram of an electronic device for wireless communication according to one embodiment.

FIG. 3 is a flowchart for connecting to a cell in an electronic device according to one embodiment.

FIG. 4 is a flowchart for transmitting information related to reduced capacity in an electronic device according to one embodiment.

FIG. 5 is an example of connecting to a cell supporting reduced capabilities in an electronic device according to one embodiment.

FIG. 6 is a flowchart for reselecting a cell in an electronic device according to one embodiment.

FIG. 7 is a flowchart for supporting a reduced capability mode in an electronic device according to one embodiment.

The following examples are described in detail with reference to the attached drawings.

FIG. 1 is a block diagram of an electronic device (101) within a network environment (100) according to one embodiment. Referring to FIG. 1, in the network environment (100), the electronic device (101) may communicate with the electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of the electronic device (104) or the server (108) via a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) 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)).

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 calculations. According to one embodiment, as at least a part of the data processing or calculations, 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 a secondary 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 therewith. For example, if the electronic device (101) includes a main processor (121) and a secondary processor (123), the secondary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a specified function. The secondary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

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 the artificial intelligence model is executed, 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 a plurality of artificial neural network layers. The artificial neural network can be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), deep Q-networks, or a combination of two or more, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model can also or alternatively include a software structure.

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).

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

The input module (150) 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).

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.

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. In 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 a touch.

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).

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.

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.

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).

A 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. In one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

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.

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, for example, as at least a part of a power management integrated circuit (PMIC).

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.

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, Wi-Fi (wireless fidelity) direct, or IrDA (infrared data association)) 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).

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 high data throughput (or processing 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 implementing eMBB, a loss coverage (e.g., 164 dB or less) for implementing mMTC, 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 implementing URLLC. According to one embodiment, the subscriber identification module (196) can include a plurality of subscriber identification modules. For example, the plurality of subscriber identification modules can store different subscriber identification information.

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 by, for example, the communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. 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).

In one embodiment, the antenna module (197) may form a high-frequency (e.g., mmWave) antenna module. In one embodiment, the high-frequency (e.g., mmWave) antenna module may include a printed circuit board, an RFIC positioned on or adjacent 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) positioned on or adjacent 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. For example, the plurality of antennas may include patch array antennas and/or dipole array antennas.

At least some of the 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, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)).

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 one embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and/or 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.

An electronic device according to an embodiment disclosed in this document may take various forms. The electronic device may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. The electronic device according to an embodiment of this document is not limited to the aforementioned devices.

It should be understood that the embodiments of this document and the terminology used herein are not intended to limit the technical features described in this document to a specific embodiment, but include various modifications, equivalents, or substitutes of the embodiment. 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 item, 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.

The term "module" used in one embodiment 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).

An 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.

A method according to one embodiment disclosed in this document may be provided as 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.

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 placed 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 such a 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.

In the following description, the electronic device (101) may include an electronic device that supports reduced capability (redcap). For example, an electronic device with reduced capability may include an electronic device defined to support only a portion of the capabilities of an electronic device that can be supported in a wireless communication system (e.g., a 5G communication system).

FIG. 2 is a block diagram of an electronic device for wireless communication according to one embodiment. For example, the electronic device (101) of FIG. 2 may be at least partially similar to the electronic device (101) of FIG. 1 or may further include other embodiments of the electronic device.

According to one embodiment referring to FIG. 2, the electronic device (101) may include at least one of a processor (200), a communication circuit (210), and a memory (220). According to one embodiment, the processor (200) may be substantially the same as the processor (120) (e.g., a communication processor) of FIG. 1, or may be included in the processor (120). The communication circuit (210) may be substantially the same as the wireless communication module (192) of FIG. 1, or may be included in the wireless communication module (192). The memory (220) may be substantially the same as the memory (130) of FIG. 1, or may be included in the memory (130). For example, the processor (200) may be operatively, functionally, and/or electrically connected to at least one of the communication circuit (210) or the memory (220). For example, the processor (200) may include at least one processor including a processing circuit.

According to one embodiment, the communication circuit (210) may support wireless communication between the electronic device (101) and an external electronic device (e.g., a base station, the electronic device (102 or 104) of FIG. 1 , or the server (108)). For example, the communication circuit (210) may support a first frequency bandwidth (e.g., about 20 MHz) corresponding to a reduced capability (redcap) and a second frequency bandwidth (e.g., about 100 MHz) different from the first frequency bandwidth. For example, the first frequency bandwidth may include a frequency bandwidth defined in a standard (e.g., TS 38.306) related to reduced capability. For example, the second frequency bandwidth may include a frequency bandwidth greater than the first frequency bandwidth. For example, the wireless communication may include cellular communication (e.g., long term evolution (LTE) and/or new radio (NR)).

For example, the communication circuit (210) may include a plurality of receive paths (e.g., Rx (receive) paths). When the communication circuit (210) operates in a reduced capacity mode, it may perform wireless communication corresponding to the reduced capacity using only some of the plurality of receive paths. When the communication circuit (210) operates in a normal mode, it may perform wireless communication corresponding to the normal mode using the plurality of receive paths. For example, the plurality of receive paths may include a plurality of antennas (or receive antennas) that receive signals via a wireless resource.

According to one embodiment, when the electronic device (101) supports reduced capability, the processor (200) may determine whether a cell supporting reduced capability exists through a cell search (e.g., cell search or cell scan). For example, when the electronic device (101) with reduced capability performs cell selection, the processor (200) may determine whether the cell detected through the cell search supports reduced capability through system information (e.g., system information block (SIB) 1). For example, when "redCap-ConfigCommon" exists in SIB 1 of Table 1 below, the processor (200) may determine that the cell supports reduced capability. For example, when "redCap-ConfigCommon" does not exist in SIB 1 of Table 1 below, the processor (200) may determine that the cell does not support reduced capability. For example, a cell detected through cell search may include a cell that receives a signal exceeding a first reference strength specified through cell search. For example, the specified first reference strength may include a received signal strength set to identify (or select) a cell to which the electronic device (101) can connect when selecting a cell.

SIB1-v1700-IEs ::= SEQUENCE {
hsdn-Cell-r17 ENUMERATED {true} OPTIONAL, -- Need R
uac-BarringInfo-v1700 SEQUENCE {
uac-BarringInfoSetList-v1700 UAC-BarringInfoSetList-v1700
} OPTIONAL, -- Cond MINT
sdt-ConfigCommon-r17 SDT-ConfigCommonSIB-r17 OPTIONAL, -- Need R
redCap-ConfigCommon -r17 RedCap-ConfigCommonSIB-r17 OPTIONAL, -- Need R
featurePriorities-r17 SEQUENCE {
redCapPriority-r17 FeaturePriority-r17 OPTIONAL, -- Need R
slicingPriority-r17 FeaturePriority-r17 OPTIONAL, -- Need R
msg3-Repetitions-Priority-r17 FeaturePriority-r17 OPTIONAL, -- Need R
sdt-Priority-r17 FeaturePriority-r17 OPTIONAL -- Need R
} OPTIONAL, -- Need R
si-SchedulingInfo-v1700 SI-SchedulingInfo-v1700 OPTIONAL, -- Need R
hyperSFN-r17 BIT STRING (SIZE (10)) OPTIONAL, -- Need R
eDRX-AllowedIdle-r17 ENUMERATED {true} OPTIONAL, -- Need R
eDRX-AllowedInactive-r17 ENUMERATED {true} OPTIONAL,-- Cond EDRX-RC
intraFreqReselectionRedCap-r17 ENUMERATED {allowed,notAllowed} OPTIONAL,--Need S
cellBarredNTN-r17 ENUMERATED {barred, notBarred} OPTIONAL, -- Need S
nonCriticalExtension SIB1-v1740-IEs OPTIONAL
}

According to one embodiment, when a first cell supporting reduced capability is detected through cell search, the processor (200) may control the communication circuit (210) to perform a connection to the first cell based on the first frequency bandwidth. For example, when a first cell supporting reduced capability is detected through cell search, the processor (200) may control the communication circuit (210) to set (or switch) a frequency bandwidth for wireless communication to the first frequency bandwidth corresponding to the reduced capability. The processor (200) may perform a connection to the first cell through the communication circuit (210) set to the first frequency bandwidth. For example, a capability (e.g., UE capability) of an electronic device may be set (or updated) to correspond to the first frequency bandwidth (or reduced capability).

According to one embodiment, if a cell supporting reduced capability is not detected through cell search, the processor (200) may determine whether a cell (or a normal cell) that does not support reduced capability is detected based on cell search history or an additional cell search. For example, the cell search history may include the results of a cell search performed within a specified reference time prior to the time at which it is determined whether a cell that does not support reduced capability is detected, and may include the results of a cell search performed to determine whether a cell supporting reduced capability exists.

According to one embodiment, when a second cell that does not support the reduced capability is detected, the processor (200) may control the communication circuit (210) to perform a connection to the second cell based on the second frequency bandwidth. For example, when a second cell (or a normal cell) that does not support the reduced capability is detected through cell search, the processor (200) may control the communication circuit (210) to set (or switch) the frequency bandwidth for wireless communication to the second frequency bandwidth. The processor (200) may perform a connection to the second cell through the communication circuit (210) set to the second frequency bandwidth. For example, the capability (e.g., UE capability) of the electronic device may be set (or updated) to correspond to the second frequency bandwidth.

According to one embodiment, when the processor (200) determines that the movement state of the electronic device (101) is a moving state while the electronic device (101) is connected to a first cell supporting reduced capability, the processor (200) may perform a cell search (e.g., cell search or cell scan) to determine whether a cell supporting reduced capability exists. For example, when a third cell supporting reduced capability to which the electronic device (101) can connect is detected through the cell search, the processor (200) may control the communication circuit (210) to perform a cell reselection procedure to the third cell based on the first frequency bandwidth. For example, when a cell supporting reduced capability to which the electronic device (101) can connect is not detected through the cell search, the processor (200) may continuously or periodically perform a cell search to determine whether a cell supporting reduced capability exists. For example, the cell reselection procedure may include a series of operations to move (or handover or switch) the connection cell of the electronic device (101) from the cell to which the electronic device (101) is connected (e.g., a first cell) to a cell detected through cell search (e.g., a third cell). For example, the moving state may include a state in which the electronic device (101) is not located within a specific cell (e.g., the first cell) for a specified period of time. For example, the moving state may be a state in which the amount of movement of the electronic device (101) for a specified period of time exceeds a specified reference amount of movement, which may be detected through a sensor of the electronic device (101) (e.g., a motion sensor). For example, the capability (e.g., UE capability) of the electronic device may be maintained at a value set to correspond to the first frequency bandwidth (or reduced capability).

According to one embodiment, when the processor (200) determines that the movement state of the electronic device (101) is a moving state while the electronic device (101) is connected to a second cell that does not support reduced capability, the processor (200) may perform a cell search (e.g., cell search or cell scan) to determine whether a cell (or a normal cell) that does not support reduced capability exists. For example, when a fourth cell that does not support reduced capability to which the electronic device (101) can connect is detected through the cell search, the processor (200) may control the communication circuit (210) to perform a cell reselection procedure to the fourth cell based on the second frequency bandwidth. For example, when a cell that does not support reduced capability to which the electronic device (101) can connect is not detected through the cell search, the processor (200) may continuously or periodically perform a cell search to determine whether a cell that does not support reduced capability exists. For example, the capability (e.g., UE capability) of the electronic device may be maintained at a value set to correspond to the second frequency bandwidth.

According to one embodiment, when the processor (200) determines that the movement state of the electronic device (101) is stationary while the electronic device (101) is connected to the first cell or the second cell, the processor (200) may perform a cell search (e.g., cell search or cell scan) to determine whether there is a cell (or a normal cell) that does not support the reduced capability. For example, the stationary state may include a state in which the electronic device (101) is located within a specific cell (e.g., the first cell) for a specified period of time. For example, the stationary state may include a state in which the amount of movement of the electronic device (101) for a specified period of time is less than or equal to a specified reference movement amount, which may be determined through a sensor (e.g., a motion sensor) of the electronic device (101). For example, the cell search may include a background scan.

According to one embodiment, when a third cell supporting reduced capability is detected through cell search, the processor (200) may control the communication circuit (210) to perform a cell reselection procedure to the third cell based on the first frequency bandwidth. For example, when the electronic device (101) is connected to the first cell or the second cell, the processor (200) may determine whether the reception signal strength of the third cell supporting reduced capability exceeds a designated second reference strength. When the reception signal strength of the third cell supporting reduced capability exceeds the designated second reference strength, the processor (200) may control the communication circuit (210) to perform a cell reselection procedure to the third cell. For example, the reception signal strength of the third cell may be added with a gain of a designated reference value (e.g., Qoffset_redcap) so that cell reselection to the cell supporting reduced capability is prioritized. For example, the designated second reference strength (e.g., T_redcap_H) is a received signal strength set to identify (or select) an accessible cell for the electronic device (101) during cell reselection, and may include a value that is equal to or greater than the designated first reference strength. For example, the capability (e.g., UE capability) of the electronic device may be set (or updated) to correspond to the first frequency bandwidth (or reduced capability).

According to one embodiment, if a cell supporting reduced capability is not detected through cell search, the processor (200) may determine whether a cell (or a normal cell) that does not support reduced capability is detected based on cell search history or an additional cell search. For example, the cell search history may include the results of a cell search performed within a specified reference time prior to the time at which it is determined whether a cell that does not support reduced capability is detected, and may include the results of a cell search performed to determine whether a cell supporting reduced capability exists.

According to one embodiment, when a fourth cell that does not support reduced capability is detected, the processor (200) may control the communication circuit (210) to perform a cell reselection procedure to the fourth cell based on the second frequency bandwidth. For example, when the electronic device (101) is connected to the first cell, the processor (200) may determine whether the reception signal strength of the fourth cell that does not support reduced capability exceeds a specified second reference strength and the reception signal strength of the first cell is less than a specified third reference strength. When the reception signal strength of the fourth cell that does not support reduced capability exceeds the specified second reference strength and the reception signal strength of the first cell is less than the specified third reference strength, the processor (200) may control the communication circuit (210) to perform a cell reselection procedure to the fourth cell. For example, the strength of the received signal of the first cell may be added with a gain of a designated reference value (e.g., Qoffset_redcap) so that wireless communication through a cell supporting a reduced capability is prioritized. For example, a designated third reference strength (e.g., T_redcap_L) may be a received signal strength set to determine whether cell reselection from a cell to which the electronic device (101) is connected during cell reselection, and may include a value smaller than a designated second reference strength. For example, the capability (e.g., UE capability) of the electronic device may be set (or updated) to correspond to the second frequency bandwidth.

For example, when the electronic device (101) is connected to the second cell, the processor (200) can determine whether the reception signal strength of the fourth cell that does not support the reduced capability exceeds a specified second reference strength. When the reception signal strength of the fourth cell that does not support the reduced capability exceeds the specified second reference strength, the processor (200) can control the communication circuit (210) to perform a cell reselection procedure to the fourth cell. For example, the capability (e.g., UE capability) of the electronic device can be maintained at a set value corresponding to the second frequency bandwidth (or reduced capability).

According to one embodiment, the processor (200) may set the operation mode of the electronic device (101) to the reduced capability mode when a specified condition related to reduced capability is satisfied. For example, when the operation mode of the electronic device (101) is set to the reduced capability mode, the processor (200) may preferentially check whether there is a cell supporting the reduced capability during cell selection and cell reselection. For example, a state that satisfies the specified condition related to reduced capability may include at least one of a state in which the temperature of the electronic device (101) exceeds a specified reference temperature, a state in which the remaining battery capacity of the electronic device (101) is lower than or equal to a specified reference battery capacity, a state in which an application or function related to reduced capability is executed, or a state in which an application or function that restricts reduced capability is not executed.

For example, if a specified condition related to reduced capability is satisfied, the processor (200) may set (or switch) a stack of subscriber identity modules (SIMs) included in the electronic device (101) that are not used for data communication to operate in a reduced capability mode.

According to one embodiment, if a specified condition related to reduced capability is not satisfied, the processor (200) may set the operation mode of the electronic device (101) to the normal mode. For example, if the operation mode of the electronic device (101) is set to the normal mode, the processor (200) may check whether there is a cell that does not support the reduced capability during cell selection and cell reselection. For example, a state in which the specified condition related to reduced capability is not satisfied may include at least one of a state in which the temperature of the electronic device (101) is below a specified reference temperature, a state in which the remaining battery capacity of the electronic device (101) exceeds a specified reference battery capacity, a state in which an application or function related to reduced capability is not executed, or a state in which an application or function that restricts the reduced capability is executed. For example, the normal mode may include an operation mode in which wireless communication is performed based on a capability of the electronic device that can be supported in a wireless communication system (e.g., a 5G communication system).

According to one embodiment, the processor (200) may set (or switch) a stack of subscriber identification modules not used for data communication among a plurality of subscriber identification modules included in the electronic device (101) to operate in a reduced capacity mode. For example, the plurality of subscriber identification modules may include a first subscriber identification module including first subscriber identification information and a second subscriber identification module including second subscriber identification information. When performing data communication through the stack of the first subscriber identification modules, the processor (200) may set (or switch) the stack of the second subscriber identification modules to operate in a reduced capacity mode.

According to one embodiment, the memory (220) may store various data used by at least one component (e.g., the processor (200) or the communication circuit (210)) of the electronic device (101). For example, the memory (220) may store various instructions that may be executed by the processor (200). For example, the instructions may be executed individually or collectively by the processor (200) (e.g., at least one processor).

According to one embodiment, an electronic device (e.g., electronic device (101) of FIG. 1 or 2) may include communication circuitry (e.g., wireless communication module (192) of FIG. 1 or communication circuitry (210) of FIG. 2) that supports a first bandwidth associated with reduced capability (redcap) and a second bandwidth greater than the first bandwidth, at least one processor (e.g., processor (120) of FIG. 1 or processor (200) of FIG. 2) that includes processing circuitry, and a memory (e.g., memory (130) of FIG. 1 or memory (220) of FIG. 2) that stores instructions. According to one embodiment, the instructions, when individually or collectively executed by the at least one processor, may be stored such that the electronic device determines, through cell search, whether a cell supporting reduced capability exists. In one embodiment, the instructions, when executed individually or collectively by at least one processor, may cause the electronic device to determine whether a cell that does not support the reduced capability exists, if no cell supporting the reduced capability exists. In one embodiment, the instructions, when executed individually or collectively by at least one processor, may cause the electronic device to set a bandwidth of the electronic device to a second bandwidth, if a cell that does not support the reduced capability exists. In one embodiment, the instructions, when executed individually or collectively by at least one processor, may cause the electronic device to access a cell that does not support the reduced capability in response to the setting to the second bandwidth.

According to one embodiment, the instructions, when executed individually or collectively by at least one processor, may cause the electronic device to determine a state of movement of the electronic device while connected to a cell that does not support reduced capabilities. According to one embodiment, the instructions, when executed individually or collectively by at least one processor, may cause the electronic device, when in a mobile state, to perform a cell search to determine whether another cell that does not support reduced capabilities to which the electronic device can connect exists. According to one embodiment, the instructions, when executed individually or collectively by at least one processor, may cause the electronic device to connect to another cell if another cell that does not support reduced capabilities to which the electronic device can connect exists.

In one embodiment, the instructions, when individually or collectively executed by at least one processor, may cause the electronic device to determine, when in a stopped state, whether there is a cell supporting reduced capability accessible by the electronic device through a cell search. In one embodiment, the instructions, when individually or collectively executed by at least one processor, may cause the electronic device to set a bandwidth of the electronic device to a first bandwidth if there is a cell supporting reduced capability accessible by the electronic device. In one embodiment, the instructions, when individually or collectively executed by at least one processor, may cause the electronic device to, in response to the setting to the first bandwidth, connect to a cell supporting reduced capability.

According to one embodiment, the instructions, when executed individually or collectively by at least one processor, may cause the electronic device, when in a stationary state, to perform a cell search to determine if there is no cell supporting reduced capability accessible to the electronic device, another cell that does not support reduced capability accessible to the electronic device exists. According to one embodiment, the instructions, when executed individually or collectively by at least one processor, may cause the electronic device, when in a stationary state, to access another cell that does not support reduced capability accessible to the electronic device exists.

According to one embodiment, the instructions, when individually or collectively executed by at least one processor, may cause the electronic device to set a bandwidth of the electronic device to a first bandwidth if a cell supporting the reduced capability exists through cell search. According to one embodiment, the instructions, when individually or collectively executed by at least one processor, may cause the electronic device to access a cell supporting the reduced capability in response to the setting to the first bandwidth.

According to one embodiment, the instructions, when executed individually or collectively by at least one processor, may cause an electronic device, when connected to a cell supporting reduced capability, to perform a cell search to determine if there are other cells supporting reduced capability to which the electronic device can connect.

According to one embodiment, the instructions, when executed individually or collectively by at least one processor, may cause the electronic device to determine, through system information of a cell detected through cell search, whether the cell supports reduced capabilities.

According to one embodiment, an electronic device may include a first subscriber identification module including first subscriber identification information and a second subscriber identification module including second subscriber identification information. According to one embodiment, instructions, when individually or collectively executed by at least one processor, may cause the electronic device to support a stack of the second subscriber identification module with reduced capabilities when performing data communication via the first subscriber identification module.

According to one embodiment, the instructions, when executed individually or collectively by the processor, may set the stack of the second subscriber identity module to support reduced capability if the electronic device determines that a specified condition associated with reduced capability is satisfied based on a battery level of the electronic device or a temperature of the electronic device.

FIG. 3 is a flowchart (300) for accessing a cell in an electronic device according to one embodiment. In the following embodiments, the operations may be performed sequentially, but are not necessarily sequential. For example, the order of the operations may be changed, and at least two operations may be performed in parallel. For example, the electronic device of FIG. 3 may be the electronic device (101) of FIG. 1 or FIG. 2.

According to one embodiment referring to FIG. 3, an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120) of FIG. 1 or processor (200) of FIG. 2) may perform a cell search (e.g., cell search or cell scan) in operation 301. For example, when power is supplied to the electronic device (101) and the communication circuit (210) is activated, the processor (200) may control the communication circuit (210) to perform a cell search based on a frequency band supported by the electronic device (101). For example, when the electronic device (101) is out of a shaded area, the processor (200) may control the communication circuit (210) to perform a cell search based on a frequency band supported by the electronic device (101). For example, the processor (200) may control the communication circuit (210) to perform a cell search based on a frequency band supported by the electronic device (101) when the electronic device (101) is released from a communication restriction (e.g., flight mode).

According to one embodiment, an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) may, at operation 303, determine whether there is a cell supporting reduced capability that the electronic device (101) can access through a cell search. For example, the processor (200) may determine whether a cell detected through the cell search supports reduced capability through system information (e.g., system information block (SIB) 1) of the cell detected through the cell search. For example, a cell supporting reduced capability includes "redCap-ConfigCommon" in SIB 1. For example, a cell not supporting reduced capability does not include "redCap-ConfigCommon" in SIB 1. For example, a cell detected through the cell search may include a cell that receives a signal exceeding a first reference strength specified through the cell search. For example, the designated first reference strength may include the strength of a received signal set to identify (or select) a cell to which the electronic device (101) can connect when selecting a cell.

According to one embodiment, when an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) determines that there is a first cell supporting reduced capability to which the electronic device (101) can connect (e.g., 'Yes' in operation 303), in operation 305, the electronic device (101) may connect to the first cell based on the first frequency bandwidth. For example, when a first cell supporting reduced capability is detected through cell search, the processor (200) may control the communication circuit (210) to set (or switch) the frequency bandwidth of the electronic device (101) for wireless communication to the first frequency bandwidth corresponding to the reduced capability. The processor (200) may perform connection to the first cell through the communication circuit (210) set to the first frequency bandwidth. The processor (200) can set (or update) the frequency bandwidth (or maximum frequency band) supported by the electronic device (101) included in the capabilities (e.g., UE capability) of the electronic device to correspond to the first frequency bandwidth (or reduced capability).

According to one embodiment, when an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) determines that there is no cell supporting reduced capability that the electronic device (101) can connect to (e.g., 'No' in operation 303), in operation 307, the processor may determine whether a cell (or a normal cell) that does not support reduced capability is detected based on the cell search history or an additional cell search. For example, if there is a result of a cell search performed within a specified reference time prior to the time at which it is determined whether a cell that does not support reduced capability is detected, the processor (200) may determine whether there is a cell that does not support reduced capability that the electronic device (101) can connect to based on the cell search result. For example, if there is no result of a cell search performed within a specified reference time prior to the time at which it is determined whether a cell that does not support reduced capability is detected, the processor (200) may determine whether there is a cell that does not support reduced capability that the electronic device (101) can connect to through the cell search.

In one embodiment, an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) may terminate an embodiment for accessing a cell if no cell supporting reduced capability to which the electronic device (101) can connect is detected (e.g., 'No' in operation 307). For example, if no cell to which the electronic device (101) can connect is detected, the processor (200) may continuously or periodically perform cell searches to determine whether there is a cell supporting reduced capability to which the electronic device (101) can connect or a cell not supporting reduced capability.

According to one embodiment, when an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) detects a cell that does not support a reduced capability accessible to the electronic device (101) (e.g., 'Yes' in operation 307), in operation 309, the electronic device (101) may set a frequency bandwidth for wireless communication to a second frequency bandwidth. For example, a frequency bandwidth (or maximum frequency band) supported by the electronic device (101) included in a capability (e.g., UE capability) of the electronic device may be updated to correspond to the second frequency bandwidth.

According to one embodiment, an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) may, at operation 311, access a second cell (or a normal cell) that does not support reduced capabilities based on a second frequency bandwidth. For example, the processor (200) may access the second cell via a communication circuit (210) set to the second frequency bandwidth.

FIG. 4 is a flowchart (400) for transmitting information related to reduced capabilities in an electronic device according to one embodiment. For example, at least a portion of FIG. 4 may include a detailed description of operation 305 of FIG. 3 . In the following embodiments, the operations may be performed sequentially, but are not necessarily sequential. For example, the order of the operations may be changed, and at least two operations may be performed in parallel. For example, the electronic device of FIG. 4 may be the electronic device (101) of FIG. 1 or FIG. 2 .

According to one embodiment referring to FIG. 4, when an electronic device (e.g., electronic device 101) or a processor (e.g., processor 120 of FIG. 1 or processor 200 of FIG. 2) determines that there is a first cell supporting reduced capability accessible to the electronic device (e.g., 'Yes' of operation 303 of FIG. 3), in operation 401, the processor may determine whether a specified transmission condition is satisfied. For example, if the first cell includes resource configuration information of an initial uplink (UL) bandwidth part (BWP) corresponding to the reduced capability and a physical random access channel (PRACH) corresponding to the reduced capability, the processor may determine that the specified transmission condition is satisfied. For example, if the first cell does not include resource configuration information of an initial uplink BWP corresponding to the reduced capability and/or a PRACH corresponding to the reduced capability, the processor may determine that the first cell does not satisfy the specified transmission condition.

According to one embodiment, if an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) determines that a specified transmission condition is satisfied (e.g., 'Yes' in operation 401), in operation 403, the electronic device (101) may transmit information related to a reduced capability to a first cell via a random access channel (RACH). For example, the processor (200) may control the communication circuit (210) to transmit a PRACH preamble based on resource configuration information of a PRACH corresponding to the reduced capability so as to transmit status information that the electronic device (101) supports the reduced capability to the first cell. For example, the resource configuration information of the PRACH corresponding to the reduced capability may be obtained from system information (e.g., SIB 1) of the first cell.

According to one embodiment, if the electronic device (e.g., electronic device (101)) or the processor (e.g., processor (120 or 200)) determines that the specified transmission condition is not satisfied (e.g., 'NO' in operation 401), in operation 405, the electronic device (101) may transmit information related to the reduced capability of the electronic device to the first cell through an RRC connection procedure. For example, the processor (200) may control the communication circuit (210) to transmit an RRC connection request message including status information supporting the reduced capability of the electronic device (101).

FIG. 5 is an example of connecting to a cell supporting reduced capabilities in an electronic device according to one embodiment.

According to one embodiment referring to FIG. 5, an electronic device (101) supporting reduced capability (e.g., redcap) can check whether a cell (500) supporting reduced capability exists through cell search. For example, the electronic device (101) can determine whether the network device (500) of the first cell supports reduced capability through system information (e.g., system information block (SIB) 1) received from the network device (500) of the first cell (operation 511). For example, if the SIB 1 received from the network device (500) includes "redCap-ConfigCommon," the electronic device (101) can determine that the network device (500) of the first cell supports reduced capability. For example, if the SIB 1 received from the network device (500) does not include “redCap-ConfigCommon,” the electronic device (101) may determine that the network device (500) of the first cell does not support reduced capabilities.

According to one embodiment, if the electronic device (101) determines that the network device (500) of the first cell supports reduced capability, the electronic device (101) may determine whether the network device (500) satisfies a specified transmission condition. For example, if the network device (500) of the first cell includes resource configuration information of an initial uplink bitmap (BWP) corresponding to the reduced capability and a physical random access channel (PRACH) corresponding to the reduced capability, the electronic device (101) may determine that the network device (500) of the first cell satisfies a specified transmission condition. For example, if the network device (500) of the first cell does not include resource configuration information of an initial uplink bitmap (BWP) corresponding to the reduced capability and/or a PRACH corresponding to the reduced capability, the electronic device (101) may determine that the network device (500) of the first cell does not satisfy a specified transmission condition.

According to one embodiment, if the electronic device (101) determines that the network device (500) of the first cell satisfies a specified transmission condition, the electronic device (101) may transmit a PRACH preamble (e.g., Msg (message) 1) to the network device (500) based on resource configuration information of the PRACH corresponding to the reduced capability (operation 513). For example, if the electronic device (101) determines that the network device (500) of the first cell does not satisfy the specified transmission condition, the electronic device (101) may transmit a general PRACH preamble to the network device (500). The general PRACH preamble may be transmitted through resources allocated from the network device (500) that are at least partially different from the resources of the PRACH corresponding to the reduced capability.

According to one embodiment, the network device (500) may determine that the electronic device (101) supports the reduced capability when a PRACH preamble is received through a resource of a PRACH corresponding to the reduced capability. The network device (500) may transmit a RACH response message (e.g., Msg 2) corresponding to the PRACH preamble to the electronic device (101) (operation 515).

According to one embodiment, the electronic device (101) may transmit an RRC connection request message (e.g., Msg 3) to the network device (500) for an RRC connection with the network device (500) (operation 517). For example, if the electronic device (101) determines that the network device (500) of the first cell does not satisfy a specified transmission condition, the electronic device (101) may transmit an RRC connection request message including status information supporting the reduced capability of the electronic device (101) to the network device (500).

According to one embodiment, when the network device (500) accepts an RRC connection with the electronic device (101), it may transmit an RRC connection setup message (e.g., Msg 4) to the electronic device (101) (operation 519).

According to one embodiment, the electronic device (101) may determine that an RRC connection with the network device (500) has been established based on reception of an RRC connection setup message. In this case, the electronic device (101) may transmit an RRC connection setup complete message to the network device (500) (operation 521).

FIG. 6 is a flowchart (600) for cell reselection in an electronic device according to one embodiment. In the following embodiments, the operations may be performed sequentially, but are not necessarily sequential. For example, the order of the operations may be changed, and at least two operations may be performed in parallel. For example, the electronic device of FIG. 6 may be the electronic device (101) of FIG. 1 or FIG. 2.

According to one embodiment referring to FIG. 6, an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120) of FIG. 1 or processor (200) of FIG. 2) may connect to a network in operation 601. For example, the processor (200) may control the communication circuit (210) to connect to a first cell supporting reduced capability or a second cell not supporting reduced capability, such as operations 301 to 311 of FIG. 3.

According to one embodiment, an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) may determine whether the electronic device (101) is stationary in operation 603. For example, if the processor (200) determines that the electronic device (101) is not located within a specific cell (e.g., a first cell) for a specified period of time and is moving to another cell, the processor (200) may determine that the movement state of the electronic device (101) is in a moving state. For example, if the amount of movement of the electronic device (101) confirmed through a sensor (e.g., a movement sensor) of the electronic device (101) continuously exceeds a specified reference movement amount for a specified period of time, the processor (200) may determine that the movement state of the electronic device (101) is in a moving state.

For example, if the processor (200) determines that the electronic device (101) is located within a specific cell (e.g., the first cell) for a specified period of time, the processor (200) may determine that the movement state of the electronic device (101) is stationary. For example, if the amount of movement of the electronic device (101) confirmed through a sensor (e.g., a movement sensor) of the electronic device (101) is continuously less than a specified reference movement amount for a specified period of time, the processor (200) may determine that the movement state of the electronic device (101) is stationary.

According to one embodiment, when an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) determines that the electronic device (101) is in a stationary state (e.g., 'Yes' in operation 603), in operation 605, the processor (200) may determine whether a cell supporting reduced capability to which the electronic device (101) can connect exists. For example, if there is a result of a cell search performed within a specified reference time prior to the time at which it is determined whether a cell supporting reduced capability is detected, the processor (200) may determine whether there is a cell supporting reduced capability to which the electronic device (101) can connect exists based on the result of the cell search. For example, if there is no result of a cell search performed within a specified reference time prior to the time at which it is determined whether a cell supporting reduced capability is detected, the processor (200) may perform a cell search to determine whether there is a cell supporting reduced capability to which the electronic device (101) can connect exists. For example, the cell search may include a background scan.

According to one embodiment, when an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) determines that there is a third cell supporting reduced capability that the electronic device (101) can connect to (e.g., 'Yes' in operation 605), in operation 607, the processor (200) may perform a cell reselection procedure to the third cell based on the first frequency bandwidth. For example, when the electronic device (101) is connected to the first cell or the second cell, the processor (200) may determine whether the reception signal strength of the third cell supporting reduced capability exceeds a specified second reference strength. When the reception signal strength of the third cell exceeds the specified second reference strength, the processor (200) may control the communication circuit (210) to perform a cell reselection procedure to the third cell. The processor (200) may control the communication circuit (210) to maintain a connection to a first cell supporting reduced capability or a second cell not supporting reduced capability when the reception signal strength of the third cell is less than or equal to a designated second reference strength. For example, the reception signal strength of the third cell may have a gain of a designated reference value (e.g., Qoffset_redcap) added to it so that cell reselection to a cell supporting reduced capability is prioritized. For example, the designated second reference strength (e.g., T_redcap_H) may be a reception signal strength set to identify (or select) an accessible cell for the electronic device (101) during cell reselection, and may include a value that is equal to or greater than the designated first reference strength. For example, the capability (e.g., UE capability) of the electronic device may be set (or updated) to correspond to the first frequency bandwidth (or reduced capability). For example, the cell reselection procedure may include a series of operations to move (or handover or switch) the connection cell of the electronic device (101) from the cell to which the electronic device (101) is connected (e.g., the first cell) to a cell detected through cell search (e.g., the third cell).

According to one embodiment, if an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) determines that there is no cell supporting reduced capability that the electronic device (101) can connect to (e.g., 'No' in operation 605), in operation 609, the processor may determine whether a cell (or a normal cell) that does not support reduced capability is detected. For example, if there is a result of a cell search performed within a specified reference time prior to the time at which it is determined whether a cell that does not support reduced capability is detected, the processor (200) may determine, based on the result of the cell search, whether there is a cell that does not support reduced capability that the electronic device (101) can connect to. For example, if there is no result of a cell search performed within a specified reference time prior to the time at which it is determined whether a cell that does not support reduced capability is detected, the processor (200) may determine, through the cell search, whether there is a cell that does not support reduced capability that the electronic device (101) can connect to.

In one embodiment, the electronic device (e.g., electronic device (101)) or the processor (e.g., processor (120 or 200)) may terminate the cell reselection process if no cell that supports reduced capability to which the electronic device (101) can connect is detected (e.g., 'NO' in operation 609). For example, the processor (200) may continuously or periodically perform cell searches to determine whether there are cells that support reduced capability to which the electronic device (101) can connect or cells that do not support reduced capability.

According to one embodiment, when an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) detects a fourth cell (or a normal cell) that does not support reduced capability to which the electronic device (101) can connect (e.g., 'Yes' in operation 609), in operation 611, the processor (200) may perform a cell reselection procedure to the fourth cell based on the second frequency bandwidth. For example, when the electronic device (101) is connected to a first cell that supports reduced capability, the processor (200) may determine whether the reception signal strength of the fourth cell that does not support reduced capability exceeds a specified second reference strength and whether the reception signal strength of the first cell is less than a specified third reference strength. The processor (200) may control the communication circuit (210) to perform a cell reselection procedure to the fourth cell when the reception signal strength of the fourth cell that does not support the reduced capability exceeds a designated second reference strength and the reception signal strength of the first cell is less than a designated third reference strength. The processor (200) may control the communication circuit (210) to maintain the connection to the first cell when the reception signal strength of the fourth cell that does not support the reduced capability is less than or equal to the designated second reference strength or the reception signal strength of the first cell is greater than or equal to the designated third reference strength. For example, the reception signal strength of the first cell may be added with a gain of a designated reference value (e.g., Qoffset_redcap) so that wireless communication via the cell that supports the reduced capability is prioritized. For example, the designated third reference strength (e.g., T_redcap_L) is the strength of a received signal set to determine whether to perform cell reselection from a cell to which the electronic device (101) is connected during cell reselection, and may include a value smaller than the designated second reference strength. For example, the frequency bandwidth (or maximum frequency band) supported by the electronic device (101) included in the capability (e.g., UE capability) of the electronic device may be set (or updated) to correspond to the second frequency bandwidth.

For example, when the electronic device (101) is connected to a second cell (or a normal cell) that does not support reduced capability, the processor (200) can determine whether the reception signal strength of the fourth cell that does not support reduced capability exceeds a specified second reference strength. When the reception signal strength of the fourth cell that does not support reduced capability exceeds the specified second reference strength, the processor (200) can control the communication circuit (210) to perform a cell reselection procedure to the fourth cell. For example, a frequency bandwidth (or maximum frequency band) supported by the electronic device (101) included in the capability (e.g., UE capability) of the electronic device can be maintained at a value set to correspond to the second frequency bandwidth (or reduced capability).

According to one embodiment, if the electronic device (e.g., electronic device (101)) or the processor (e.g., processor (120 or 200)) determines that the electronic device (101) is not stationary (e.g., moving) (e.g., 'No' in operation 603), in operation 613, the processor (200) may determine whether a cell corresponding to the frequency bandwidth of the electronic device (101) is detected. For example, if the processor (200) determines that the movement state of the electronic device (101) is moving while the electronic device (101) is connected to a first cell supporting reduced capability, the processor (200) may determine whether there is a cell supporting reduced capability that the electronic device (101) can connect to through cell search history or cell search. For example, if the processor (200) determines that the movement state of the electronic device (101) is a moving state while the electronic device (101) is connected to a second cell that does not support reduced capabilities, the processor (200) can check whether there is a cell (or a normal cell) that does not support reduced capabilities to which the electronic device (101) can connect through the cell search history or cell search.

In one embodiment, an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) may terminate an embodiment for reselecting a cell if a cell corresponding to the frequency bandwidth of the electronic device (101) is not detected (e.g., 'No' in operation 613). For example, the processor (200) may continuously or periodically perform cell searches to determine whether there are cells supporting reduced capabilities or cells not supporting reduced capabilities that the electronic device (101) can access.

According to one embodiment, when a cell corresponding to the frequency bandwidth of the electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) is detected (e.g., 'Yes' in operation 613), the processor (200) may perform a cell reselection procedure in operation 615. For example, when the electronic device (101) is connected to a first cell supporting reduced capability and a third cell supporting reduced capability to which the electronic device (101) can connect is detected, the processor (200) may control the communication circuit (210) to perform a cell reselection procedure to the third cell based on the first frequency bandwidth. For example, when a cell supporting reduced capability to which the electronic device (101) can connect is not detected, the processor (200) may continuously or periodically perform a cell search to determine whether a cell supporting reduced capability exists. For example, the frequency bandwidth (or maximum frequency band) supported by the electronic device (101) included in the capability (e.g., UE capability) of the electronic device may be maintained at a value set to correspond to the first frequency bandwidth (or reduced capability).

For example, when a fourth cell that does not support the reduced capability to which the electronic device (101) can connect is detected while the electronic device (101) is connected to a second cell that does not support the reduced capability, the processor (200) may control the communication circuit (210) to perform a cell reselection procedure to the fourth cell based on the second frequency bandwidth. For example, when a cell that does not support the reduced capability to which the electronic device (101) can connect is not detected, the processor (200) may continuously or periodically perform a cell search to check whether a cell that does not support the reduced capability exists. For example, a frequency bandwidth (or maximum frequency band) supported by the electronic device (101) included in the capability (e.g., UE capability) of the electronic device may be maintained at a value set to correspond to the second frequency bandwidth.

FIG. 7 is a flowchart (700) for supporting a reduced capacity mode in an electronic device according to one embodiment. In the following embodiments, the operations may be performed sequentially, but are not necessarily sequential. For example, the order of the operations may be changed, and at least two operations may be performed in parallel. For example, the electronic device of FIG. 7 may be the electronic device (101) of FIG. 1 or FIG. 2.

According to one embodiment referring to FIG. 7, an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120) of FIG. 1 or processor (200) of FIG. 2) may, in operation 701, determine whether a specified condition related to reduced capability is satisfied. For example, the processor (200) may determine whether a specified condition related to reduced capability is satisfied based on at least one of a temperature of the electronic device (101), a remaining battery level of the electronic device (101), or an application or function running on the electronic device (101).

For example, the processor (200) may determine that a specified condition related to reduced capability is satisfied when the temperature of the electronic device (101) exceeds a specified reference temperature. The processor (200) may determine that a specified condition related to reduced capability is not satisfied when the temperature of the electronic device (101) is below a specified reference temperature.

For example, the processor (200) may determine that a specified condition related to reduced capacity is satisfied when the remaining battery capacity of the electronic device (101) is less than or equal to a specified reference battery capacity. The processor (200) may determine that a specified condition related to reduced capacity is not satisfied when the remaining battery capacity of the electronic device (101) exceeds a specified reference battery capacity.

For example, the processor (200) may determine that a specified condition related to reduced capability is satisfied when an application or function related to reduced capability is running (or is running) on the electronic device (101). The processor (200) may determine that a specified condition related to reduced capability is not satisfied when an application or function related to reduced capability is not running on the electronic device (101).

For example, the processor (200) may determine that a specified condition related to reduced capability is satisfied if an application or function that limits reduced capability is not executed on the electronic device (101). The processor (200) may determine that a specified condition related to reduced capability is not satisfied if an application or function that limits reduced capability is executed (or is being executed) on the electronic device (101).

According to one embodiment, when an electronic device (e.g., electronic device (101)) or a processor (e.g., processor (120 or 200)) determines that a specified condition related to reduced capability is satisfied (e.g., 'Yes' in operation 701), in operation 703, the electronic device may set the operating mode of the electronic device to the reduced capability mode. For example, when the operating mode of the electronic device is set to the reduced capability mode, the processor (200) may control the communication circuit (210) to connect to a first cell supporting reduced capability or a second cell not supporting reduced capability, as in operations 301 to 311 of FIG. 3.

For example, when the operating mode of the electronic device (200) is set to a reduced capability mode, the processor (200) may control the communication circuit (210) to perform cell reselection to a third cell that supports reduced capability or a fourth cell that does not support reduced capability, such as operations 601 to 615 of FIG. 6.

According to one embodiment, if the electronic device (e.g., electronic device (101)) or the processor (e.g., processor (120 or 200)) determines that the specified condition related to the reduced capability is not satisfied (e.g., 'NO' in operation 701), in operation 705, the electronic device may set the operation mode of the electronic device to the normal mode. For example, if the operation mode of the electronic device is set to the normal mode, the processor (200) may control the communication circuit (210) to connect to a second cell that does not support the reduced capability through cell search. For example, if the operation mode of the electronic device is set to the normal mode, the processor (200) may control the communication circuit (210) to perform cell reselection to a fourth cell that does not support the reduced capability through cell search.

According to one embodiment, the electronic device (101) may set (or switch) a stack of subscriber identification modules (SIMs) not used for data communication among a plurality of subscriber identification modules (SIMs) provided in the electronic device (101) to operate in a reduced capability mode when a specified condition related to reduced capability is satisfied. For example, the electronic device (101) may easily change at least one of a frequency bandwidth, a packet data convergence protocol (PDCP) variable, a radio link channel (RLC) variable, or paging information related to the subscriber identification modules not used for data communication to correspond to the reduced capability mode by setting (or switching) the stack of subscriber identification modules not used for data communication to the reduced capability mode. For example, the stack of subscriber identification modules used for data communication among the plurality of subscriber identification modules (SIMs) may be set to a normal mode.

According to one embodiment, the electronic device (101) may set a stack of multiple subscriber identity modules (SIMs) provided in the electronic device (101) to a normal mode if a specified condition associated with reduced capability is not satisfied.

According to one embodiment, a method of operating an electronic device (e.g., the electronic device (101) of FIG. 1 or 2) may include an operation of determining whether a cell supporting reduced capability (redcap) exists through a cell search using a communication circuit that supports a first bandwidth associated with reduced capability and a second bandwidth greater than the first bandwidth. According to one embodiment, the method of operating the electronic device may include an operation of determining whether a cell that does not support the reduced capability exists if no cell supporting the reduced capability exists. According to one embodiment, the method of operating the electronic device may include an operation of setting a bandwidth of the electronic device to the second bandwidth if a cell that does not support the reduced capability exists. According to one embodiment, the method of operating the electronic device may include an operation of connecting to a cell that does not support the reduced capability in response to the setting to the second bandwidth.

According to one embodiment, a method of operating an electronic device may include an operation of checking a movement state of the electronic device while connected to a cell that does not support reduced capability. According to one embodiment, the method of operating an electronic device may include an operation of checking, through cell search, whether there is another cell that does not support reduced capability to which the electronic device can connect when the electronic device is in a mobile state. According to one embodiment, the method of operating an electronic device may include an operation of connecting to another cell if there is another cell that does not support reduced capability to which the electronic device can connect.

According to one embodiment, a method of operating an electronic device may include, when the electronic device is in a stationary state, performing a cell search to determine whether a cell supporting reduced capacity to which the electronic device can connect exists. According to one embodiment, the method of operating an electronic device may include, when a cell supporting reduced capacity to which the electronic device can connect exists, setting a bandwidth of the electronic device to a first bandwidth. According to one embodiment, the method of operating an electronic device may include, in response to the setting to the first bandwidth, connecting to a cell supporting reduced capacity.

According to one embodiment, a method of operating an electronic device may include an operation in which, when the electronic device is in a stationary state and there is no cell that supports reduced capacity to which the electronic device can connect through cell search, the electronic device determines whether there is another cell that does not support reduced capacity to which the electronic device can connect. According to one embodiment, a method of operating an electronic device may include an operation in which, when there is another cell that does not support reduced capacity to which the electronic device can connect, the electronic device connects to the other cell.

According to one embodiment, a method of operating an electronic device may include an operation of setting a bandwidth of the electronic device to a first bandwidth when a cell supporting reduced capability exists through cell search. According to one embodiment, the method of operating the electronic device may include an operation of connecting to a cell supporting reduced capability in response to the setting to the first bandwidth.

According to one embodiment, a method of operating an electronic device may include, when connected to a cell supporting reduced capability, performing a cell search to determine whether there is another cell supporting reduced capability to which the electronic device can connect.

According to one embodiment, a method of operating an electronic device may include determining whether a cell supports reduced capabilities based on system information of a cell detected through cell search.

According to one embodiment, a method of operating an electronic device may include configuring a stack of second subscriber identification modules to support reduced capabilities when performing data communication via a first subscriber identification module.

According to one embodiment, the act of setting to support reduced capability may include setting a stack of second subscriber identification modules to support reduced capability when it is determined that a specified condition related to reduced capability is satisfied based on a remaining battery level of the electronic device or a temperature of the electronic device.

The embodiments of the present disclosure disclosed in this specification and drawings are merely specific examples presented to easily explain the technical contents according to the embodiments of the present disclosure and to help understand the embodiments of the present disclosure, and are not intended to limit the scope of the embodiments of the present disclosure. Therefore, the scope of one embodiment of the present disclosure should be interpreted as including all changes or modified forms derived based on the technical idea of one embodiment of the present disclosure, in addition to the embodiments disclosed herein, within the scope of one embodiment of the present disclosure.

Claims (15)

In an electronic device (101), A communication circuit (210) supporting a first bandwidth associated with reduced capability (redcap) and a second bandwidth greater than the first bandwidth; At least one processor (200) comprising a processing circuit; and Contains memory for storing instructions, The above instructions, when individually or collectively executed by the at least one processor (200), cause the electronic device (101) to: By searching for a cell using the above communication circuit (210), it is confirmed whether there is a cell that supports the reduced capacity, If there is no cell that supports the above reduced ability, check if there is a cell that does not support the reduced ability, If there is a cell that does not support the reduced capability, the bandwidth of the electronic device is set to the second bandwidth, An electronic device that, in response to the setting to the second bandwidth, connects to a cell that does not support the reduced capability through the communication circuit (210). In paragraph 1, The above instructions, when individually or collectively executed by the at least one processor (200), cause the electronic device (101) to: Checking the movement status of the electronic device while connected to a cell that does not support the reduced capability; When the electronic device is in a mobile state, it checks through cell search whether there is another cell that does not support the reduced capacity that the electronic device can connect to, An electronic device that connects to another cell through the communication circuit (210) when there is another cell that does not support the reduced capability to which the electronic device can connect. In claim 1 or 2, The above instructions, when individually or collectively executed by the at least one processor (200), cause the electronic device (101) to: When the electronic device is in a stationary state, a cell search is performed to determine whether there is a cell that supports a reduced capacity that the electronic device can access, If there is a cell that supports a reduced capability that the electronic device can access, the bandwidth of the electronic device is set to the first bandwidth, An electronic device, in response to the setting to the first bandwidth, for connecting to a cell supporting the reduced capability through the communication circuit. In the third paragraph, The above instructions, when individually or collectively executed by the at least one processor (200), cause the electronic device (101) to: When the electronic device determines through the cell search in a stationary state that there is no cell supporting reduced capability that the electronic device can access, the electronic device determines whether there is another cell that does not support reduced capability that the electronic device can access, An electronic device that allows the electronic device to access another cell via the communication circuit, if there is another cell that does not support the reduced capability to which the electronic device can access. In any one of claims 1 to 4, The above instructions, when individually or collectively executed by the at least one processor (200), cause the electronic device (101) to: If it is confirmed through the above cell search that there is a cell supporting the reduced capability, the bandwidth of the electronic device is set to the first bandwidth, An electronic device, in response to the setting to the first bandwidth, for connecting to a cell supporting the reduced capability through the communication circuit. In paragraph 5, The above instructions, when individually or collectively executed by the at least one processor (200), cause the electronic device (101) to: An electronic device that, when connected to a cell supporting the reduced capability, performs a cell search to determine whether there is another cell supporting the reduced capability to which the electronic device can connect. In any one of claims 1 to 6, The above instructions, when individually or collectively executed by the at least one processor (200), cause the electronic device (101) to: An electronic device that determines whether a cell supports reduced capabilities through system information of a cell detected through the above cell search. In paragraph 1, A first subscriber identification module including first subscriber identification information, and Further comprising a second subscriber identification module including second subscriber identification information, The above memory (220), when executed individually or collectively by the at least one processor (200), the electronic device (101), An electronic device storing instructions for setting the stack of the second subscriber identification module to support reduced capabilities when performing data communication using the first subscriber identification module. In the operating method of an electronic device (101), An operation of checking whether a cell supporting the reduced capability exists by performing a cell search using a communication circuit (210) supporting a first bandwidth associated with the reduced capability (redcap) and a second bandwidth greater than the first bandwidth; If there is no cell supporting the reduced capability, an action to check if there is a cell that does not support the reduced capability; If there is a cell that does not support the reduced capability, an operation of setting the bandwidth of the electronic device to the second bandwidth, and A method comprising, in response to setting to the second bandwidth, connecting to a cell that does not support the reduced capability. In paragraph 9, An operation of checking the movement status of the electronic device while connected to a cell that does not support the reduced capability; When the electronic device is in a mobile state, the operation of checking through cell search whether there is another cell that does not support reduced capacity that the electronic device can access, and A method further comprising the action of connecting to another cell if there is another cell that does not support the reduced capability to which the electronic device can connect. In claim 9 or 10, When the electronic device is in a stationary state, the operation of checking whether there is a cell supporting a reduced capacity that the electronic device can access through cell search; If there is a cell supporting a reduced capability that the electronic device can access, an operation of setting the bandwidth of the electronic device to the first bandwidth, and A method further comprising, in response to setting to the first bandwidth, connecting to a cell supporting the reduced capability. In paragraph 11, When the electronic device determines through the cell search that there is no cell supporting reduced capability that the electronic device can access while the electronic device is at a standstill, an operation of determining whether there is another cell that does not support reduced capability that the electronic device can access; and A method further comprising the action of connecting to another cell if there is another cell that does not support the reduced capability to which the electronic device can connect. In any one of the 9th to 12th clauses, If it is confirmed through the cell search that there is a cell supporting the reduced capability, an operation of setting the bandwidth of the electronic device to the first bandwidth, and A method further comprising, in response to setting to the first bandwidth, connecting to a cell supporting the reduced capability. In paragraph 13, A method further comprising, when connected to a cell supporting the reduced capability, performing a cell search to determine whether there is another cell supporting the reduced capability to which the electronic device can connect. In any one of the claims 9 to 14, A method further comprising an operation of determining whether the cell supports reduced capabilities through system information of the cell detected through the cell search.