KR102491777B1 - Electronic device for performing connection to node based on status of network and method for the same - Google Patents

Abstract

In an electronic device and an operating method of the electronic device according to various embodiments, the electronic device may include a first communication circuit supporting first cellular communication; a second communication circuit supporting a second cellular communication; and a processor, wherein the processor disconnects the first cellular communication and connects the second cellular communication in response to reception and/or transmission of a call connection request message while connected to a network; , Controls the second communication circuit to maintain the connection of the second cellular communication, and includes a condition related to whether or not system information that can be received through the second cellular communication is received in response to termination of the call connection. determine whether to release the second cellular communication based on whether at least one condition is satisfied, and establish the connection of the first cellular communication based on the information for connection of the first cellular communication included in the system information. can be set to do so.
In addition, various embodiments are possible.

Description

Electronic device and method of operating the electronic device for performing connection with a node based on a state of a network

Various embodiments of the present disclosure relate to an electronic device and an operating method of the electronic device, and to an electronic device that performs connection with a node based on a network state.

Efforts are being made to develop an improved 5G communication system or pre-5G communication system to meet the growing demand for wireless data traffic after the commercialization of the 4G communication system. For this reason, the 5G communication system or pre-5G communication system is being called a system after a 4G network (Beyond 4G Network) communication system or an LTE system (Post LTE). In order to achieve a high data rate, the 5G communication system is implemented in a mmWave band (eg, a band of 6 gigabytes (6 GHz) or more) in addition to the band used by LTE (a band of 6 gigabytes (6 GHz) or less) is being considered In the 5G communication system, beamforming, massive MIMO, Full Dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, and large scale antenna technologies are being discussed.

The 5th generation mobile communication system is a non-standalone (NSA) mode for transmitting or receiving data from a 4th generation cellular communication base station and a 5th generation cellular communication base station, or transmitting or receiving data from a 5th generation cellular communication base station. , can support a standalone (SA) receiving mode.

The electronic device may perform a call connection with an external electronic device in a state of being connected to 5G mobile communication through a node supporting a stand-alone mode. Due to limitations of 5G mobile communication, the electronic device may establish and use a call connection through 4G mobile communication for a stable connection. After terminating the call connection through 4G mobile communication, the electronic device may perform an operation of searching for a node supporting the stand-alone mode in order to reconnect to 5G mobile communication. The electronic device may search for a node supporting the standalone mode in a state in which connection through 4G mobile communication is disconnected, and it may take a lot of time to search for a node supporting the standalone mode. Furthermore, the electronic device may restrict transmission or reception of user data and control data when a search for a node supporting the standalone mode fails or when a connection through 5G mobile communication through the searched node fails. can

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An electronic device according to various embodiments of the present disclosure includes a first communication circuit supporting first cellular communication; a second communication circuit supporting a second cellular communication; and a processor, wherein the processor disconnects the first cellular communication in response to reception and/or transmission of a call connection request message while connected to a network through the first cellular communication, and the second At least one or more conditions including a condition related to whether or not system information that can be received through the second cellular communication is received in response to termination of the call connection, and controls the second communication circuit to perform cellular communication connection. It is configured to determine whether to release the second cellular communication based on whether a condition is satisfied, and to perform connection of the first cellular communication based on information for connection of the first cellular communication included in the system information. can
An operating method of an electronic device according to various embodiments of the present disclosure is directed to disconnecting the first cellular communication in response to reception of a call connection request message while connected to a network through the first cellular communication, and performing a second cellular communication operation. an operation of performing connection of communication; In response to the termination of the call connection, determining whether to release the second cellular communication based on whether or not at least one condition including a condition related to whether system information received through the second cellular communication is satisfied movement; and performing connection of the first cellular communication based on information for connection of the first cellular communication included in the system information.

An electronic device and an operating method of the electronic device according to various embodiments of the present disclosure include a condition related to whether designated system information is received in a state in which a second cellular communication connection is maintained after a call channel is disconnected. The connection of the second cellular communication may be disconnected and/or the connection of the first cellular communication may be performed based on whether at least one or more conditions are satisfied. Therefore, after the call connection is disconnected, the electronic device does not immediately disconnect the second cellular communication, but disconnects the second cellular communication only when one or more conditions are satisfied, thereby storing data after the call connection is disconnected. It is possible to minimize a period in which reception or transmission cannot be performed.

An electronic device and an operating method of the electronic device according to various embodiments of the present disclosure may perform connection of a first cellular communication based on information for connection of a first cellular communication included in system information after a call channel is disconnected. can be performed. Accordingly, the electronic device may search for a node supporting the first cellular communication using the frequency band included in the information for connection of the first cellular communication instead of all frequency bands supportable by the electronic device. It is possible to reduce the time required for connection of cellular communication.

1 is a block diagram of an electronic device according to various embodiments of the present disclosure.
2 is a block diagram of an electronic device for supporting legacy network communication and 5G network communication according to various embodiments.
3 is a diagram illustrating a protocol stack structure of a network 100 for legacy communication and/or 5G communication according to an embodiment.
4A, 4B and 4C are diagrams illustrating wireless communication systems providing a network of legacy communication and/or 5G communication according to various embodiments.
5A is a diagram illustrating an electronic device and a cellular network according to various embodiments of the present invention.
5B is a diagram illustrating operations according to call connection and call disconnection by an electronic device according to various embodiments of the present disclosure.
6 is a diagram illustrating an electronic device according to various embodiments of the present disclosure.
7 is a diagram illustrating an embodiment in which an electronic device according to various embodiments of the present disclosure performs a first cellular communication connection according to whether a specified condition is satisfied after a call connection is terminated.
FIG. 8 illustrates an embodiment in which an electronic device according to various embodiments of the present disclosure performs a first cellular communication connection or maintains a second cellular communication connection according to whether a specified condition is satisfied after a call connection is terminated. it is a drawing
9 is an operation flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure.

1 is a block diagram of an electronic device 101 within a network environment 100, according to various embodiments. Referring to FIG. 1 , in a network environment 100, an electronic device 101 communicates with an electronic device 102 through a first network 198 (eg, a short-range wireless communication network) or through a second network 199. It may communicate with at least one of the electronic device 104 or the server 108 through (eg, a long-distance wireless communication network). According to one embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 . According to an embodiment, the electronic device 101 includes a processor 120, a memory 130, an input module 150, an audio output module 155, a display module 160, an audio module 170, a sensor module ( 176), interface 177, connection terminal 178, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196 , or the antenna module 197 may be included. In some embodiments, in the electronic device 101, at least one of these components (eg, the connection terminal 178) may be omitted or one or more other components may be added. In some embodiments, some of these components (eg, sensor module 176, camera module 180, or antenna module 197) are integrated into a single component (eg, display module 160). It can be.

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

The secondary processor 123 may, for example, take the place of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or the main processor 121 is active (eg, running an application). ) state, together with the main processor 121, at least one of the components of the electronic device 101 (eg, the display module 160, the sensor module 176, or the communication module 190) It is possible to control at least some of the related functions or states. According to one embodiment, the auxiliary processor 123 (eg, image signal processor or communication processor) may be implemented as part of other functionally related components (eg, camera module 180 or communication module 190). there is. According to an embodiment, the auxiliary processor 123 (eg, a neural network processing device) may include a hardware structure specialized for processing an artificial intelligence model. AI models can be created through machine learning. Such learning may be performed, for example, in the electronic device 101 itself where the artificial intelligence model is performed, or may be performed through a separate server (eg, the server 108). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning or reinforcement learning, but in the above example Not limited. The artificial intelligence model may include a plurality of artificial neural network layers. Artificial neural networks include deep neural networks (DNNs), convolutional neural networks (CNNs), recurrent neural networks (RNNs), restricted boltzmann machines (RBMs), deep belief networks (DBNs), bidirectional recurrent deep neural networks (BRDNNs), It may be one of deep Q-networks or a combination of two or more of the foregoing, but is not limited to the foregoing examples. The artificial intelligence model may include, in addition or alternatively, software structures in addition to hardware structures.

The memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 176) of the electronic device 101 . The data may include, for example, input data or output data for software (eg, program 140) and commands related thereto. The memory 130 may 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 may receive a command or data to be used by a component (eg, the processor 120) of the electronic device 101 from the outside of the electronic device 101 (eg, a user). The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (eg, a button), or a digital pen (eg, a stylus pen).

The sound output module 155 may output sound signals to the outside of the electronic device 101 . The sound output module 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as multimedia playback or recording playback. A receiver may be used to receive an incoming call. According to one embodiment, the receiver may be implemented separately from the speaker or as part of it.

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

The audio module 170 may convert sound into an electrical signal or vice versa. According to one embodiment, the audio module 170 acquires sound through the input module 150, the sound output module 155, or an external electronic device connected directly or wirelessly to the electronic device 101 (eg: Sound may be output through the electronic device 102 (eg, a speaker or a headphone).

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

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

The connection terminal 178 may include a connector through which the electronic device 101 may be physically connected to an external electronic device (eg, the 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 (eg, a headphone connector).

The haptic module 179 may convert electrical signals into mechanical stimuli (eg, vibration or motion) or electrical stimuli that a user may perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and moving images. 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 may manage power supplied to the electronic device 101 . According to one embodiment, the power management module 188 may be implemented as at least part of a power management integrated circuit (PMIC), for example.

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

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

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

The antenna module 197 may transmit or receive signals or power to the outside (eg, an external electronic device). According to 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 (eg, PCB). According to one embodiment, the antenna module 197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is selected from the plurality of antennas by the communication module 190, for example. can be chosen A signal or power may be transmitted or received between the communication module 190 and an external electronic device through the selected at least one antenna. According to some embodiments, other components (eg, a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module 197 in addition to the radiator.

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

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

According to an embodiment, commands or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 . Each of the external electronic devices 102 or 104 may be the same as or different from the electronic device 101 . According to an embodiment, all or part of operations executed in the electronic device 101 may be executed in one or more external electronic devices among the external electronic devices 102 , 104 , or 108 . For example, when the electronic device 101 needs to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device 101 instead of executing the function or service by itself. Alternatively or additionally, one or more external electronic devices may be requested to perform the function or at least part of the service. One or more external electronic devices receiving the request may execute at least a part of the requested function or service or an additional function or service related to the request, and deliver the execution result to the electronic device 101 . The electronic device 101 may provide the result as at least part of a response to the request as it is or additionally processed. To this end, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device 101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device 104 may include an internet of things (IoT) device. Server 108 may be an intelligent server using machine learning and/or neural networks. According to one embodiment, the external electronic device 104 or server 108 may be included in the second network 199 . The electronic device 101 may be applied to intelligent services (eg, smart home, smart city, smart car, or health care) based on 5G communication technology and IoT-related technology.

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

The first communication processor 212 may establish a communication channel of a band to be used for wireless communication with the first network 292 and support legacy network communication through the established communication channel. According to various embodiments, the first network may be a legacy network including a second generation (2G), 3G, 4G, or long term evolution (LTE) network. The second communication processor 214 establishes a communication channel corresponding to a designated band (eg, about 6 GHz to about 60 GHz) among bands to be used for wireless communication with the second network 294, and 5G network communication through the established communication channel. can support According to various embodiments, the second network 294 may be a 5G network defined by 3GPP. Additionally, according to one embodiment, the first communication processor 212 or the second communication processor 214 corresponds to another designated band (eg, about 6 GHz or less) among bands to be used for wireless communication with the second network 294. It is possible to support establishment of a communication channel and 5G network communication through the established communication channel. According to one embodiment, the first communication processor 212 and the second communication processor 214 may be implemented on a single chip or in a single package. According to various embodiments, the first communication processor 212 or the second communication processor 214 may be formed in a single chip or a single package with the processor 120, the co-processor 123, or the communication module 190. there is.

When transmitting, the first RFIC 222 transmits a baseband signal generated by the first communication processor 212 to about 700 MHz to about 3 GHz used in the first network 292 (eg, a legacy network). of radio frequency (RF) signals. In reception, an RF signal is obtained from a first network 292 (eg, a legacy network) via an antenna (eg, first antenna module 242), and via an RFFE (eg, first RFFE 232). It can be preprocessed. The first RFIC 222 may convert the preprocessed RF signal into a baseband signal to be processed by the first communication processor 212 .

When transmitting, the second RFIC 224 transfers the baseband signal generated by the first communication processor 212 or the second communication processor 214 to the second network 294 (eg, a 5G network). It can be converted into an RF signal (hereinafter referred to as a 5G Sub6 RF signal) of the Sub6 band (eg, about 6 GHz or less). At reception, a 5G Sub6 RF signal is obtained from a second network 294 (eg, a 5G network) through an antenna (eg, the second antenna module 244), and an RFFE (eg, the second RFFE 234) It can be pre-treated through The second RFIC 224 may convert the preprocessed 5G Sub6 RF signal into a baseband signal to be processed by a corresponding communication processor among the first communication processor 212 and the second communication processor 214 .

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

The electronic device 101, according to one embodiment, may include a fourth RFIC 228 separately from or at least as part of the third RFIC 226. In this case, the fourth RFIC 228 converts the baseband signal generated by the second communication processor 214 into an RF signal (hereinafter, an IF signal) of an intermediate frequency band (eg, about 9 GHz to about 11 GHz). After conversion, the IF signal may be transmitted to the third RFIC 226. The third RFIC 226 may convert the IF signal into a 5G Above6 RF signal. Upon reception, the 5G Above6 RF signal may be received from the second network 294 (eg, 5G network) via an antenna (eg, antenna 248) and converted to an IF signal by a third RFIC 226. . The fourth RFIC 228 may convert the IF signal into a baseband signal so that the second communication processor 214 can process it.

According to an example, the first RFIC 222 and the second RFIC 224 may be implemented as a single chip or at least part of a single package. According to one embodiment, the first RFFE 232 and the second RFFE 234 may be implemented as a single chip or at least part of a single package. According to one embodiment, at least one antenna module of the first antenna module 242 or the second antenna module 244 may be omitted or combined with another antenna module to process RF signals of a plurality of corresponding bands.

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

According to one embodiment, the antenna 248 may be formed of an antenna array including a plurality of antenna elements that may be used for beamforming. In this case, the third RFIC 226 may include, for example, a plurality of phase shifters 238 corresponding to a plurality of antenna elements as a part of the third RFFE 236. During transmission, each of the plurality of phase converters 238 may convert the phase of a 5G Above6 RF signal to be transmitted to the outside of the electronic device 101 (eg, a base station of a 5G network) through a corresponding antenna element. . During reception, each of the plurality of phase converters 238 may convert the phase of the 5G Above6 RF signal received from the outside through the corresponding antenna element into the same or substantially the same phase. This enables transmission or reception through beamforming between the electronic device 101 and the outside.

The second network 294 (eg, 5G network) may be operated independently of the first network 292 (eg, a legacy network) (eg, Stand-Alone (SA)) or may be operated in connection with the first network 292 (eg, a legacy network). Non-Stand Alone (NSA)). For example, a 5G network may include only an access network (eg, a 5G radio access network (RAN) or a next generation RAN (NG RAN)) and no core network (eg, a next generation core (NGC)). In this case, after accessing the access network of the 5G network, the electronic device 101 may access an external network (eg, the Internet) under the control of a core network (eg, evolved packed core (EPC)) of the legacy network. Protocol information for communication with the legacy network (eg LTE protocol information) or protocol information for communication with the 5G network (eg New Radio (NR) protocol information) is stored in the memory 230, and other parts (eg processor 120, the first communications processor 212, or the second communications processor 214).

3 is a diagram illustrating a protocol stack structure of a network 100 for legacy communication and/or 5G communication according to an embodiment.

Referring to FIG. 3 , the network 100 according to the illustrated embodiment may include an electronic device 101, a legacy network 392, a 5G network 394, and a server 108.

The electronic device 101 may include an internet protocol 312 , a first communication protocol stack 314 and a second communication protocol stack 316 . The electronic device 101 may communicate with the server 108 through the legacy network 392 and/or the 5G network 394 .

According to an embodiment, the electronic device 101 may perform Internet communication associated with the server 108 using the Internet protocol 312 (eg, TCP, UDP, or IP). The Internet protocol 312 may be executed, for example, in a main processor included in the electronic device 101 (eg, the main processor 121 of FIG. 1 ).

According to another embodiment, the electronic device 101 may wirelessly communicate with the legacy network 392 using the first communication protocol stack 314 . According to another embodiment, the electronic device 101 may wirelessly communicate with the 5G network 394 using the second communication protocol stack 316 . The first communication protocol stack 314 and the second communication protocol stack 316 may be executed, for example, in one or more communication processors (eg, the wireless communication module 192 of FIG. 1) included in the electronic device 101. there is.

The server 108 may include Internet Protocol 322 . The server 108 may transmit and receive data related to the Internet protocol 322 with the electronic device 101 through the legacy network 392 and/or the 5G network 394 . According to one embodiment, server 108 may include a cloud computing server that resides outside legacy network 392 or 5G network 394 . In another embodiment, the server 108 may include an edge computing server (or mobile edge computing (MEC) server) located inside at least one of a legacy network or a 5G network 394 .

The legacy network 392 may include an LTE base station 340 and an EPC 342 . The LTE base station 340 may include an LTE communication protocol stack 344 . EPC 342 may include legacy NAS protocol 346 . The legacy network 392 may perform LTE wireless communication with the electronic device 101 using the LTE communication protocol stack 344 and the legacy NAS protocol 346 .

The 5G network 394 may include a NR base station 350 and a 5GC 352. NR base station 350 may include NR communication protocol stack 354 . 5GC 352 may include 5G NAS protocol 356 . The 5G network 394 may perform NR wireless communication with the electronic device 101 using the NR communication protocol stack 354 and the 5G NAS protocol 356.

According to one embodiment, the first communication protocol stack 314, the second communication protocol stack 316, the LTE communication protocol stack 344 and the NR communication protocol stack 354 are a control plane protocol for transmitting and receiving control messages and A user plane protocol for transmitting and receiving user data may be included. The control message may include, for example, a message related to at least one of security control, bearer setup, authentication, registration, or mobility management. User data may include, for example, data other than control messages.

According to an embodiment, the control plane protocol and the user plane protocol may include physical (PHY), medium access control (MAC), radio link control (RLC), or packet data convergence protocol (PDCP) layers. The PHY layer may, for example, channel-code and modulate data received from a higher layer (eg, MAC layer) and transmit the data through a radio channel, demodulate and decode data received through the radio channel, and transmit the data to the higher layer. there is. The PHY layer included in the second communication protocol stack 316 and the NR communication protocol stack 354 may further perform an operation related to beam forming. The MAC layer may, for example, logically/physically map data to a radio channel to be transmitted/received, and perform hybrid automatic repeat request (HARQ) for error correction. The RLC layer may perform, for example, concatenation, segmentation, or reassembly of data, and order check, rearrangement, or redundancy check of data. The PDCP layer may perform, for example, operations related to ciphering and data integrity of control messages and user data. The second communication protocol stack 316 and the NR communication protocol stack 354 may further include a service data adaptation protocol (SDAP). The SDAP may manage radio bearer assignment based on, for example, Quality of Service (QoS) of user data.

According to various embodiments, the control plane protocol may include a radio resource control (RRC) layer and a non-access stratum (NAS) layer. The RRC layer may process, for example, radio bearer setup, paging, or control data related to mobility management. The NAS may, for example, process control messages related to authentication, registration, and mobility management.

4A-4C are diagrams illustrating wireless communication systems providing a network of legacy communication and/or 5G communication according to various embodiments. Referring to FIGS. 4A to 4C , network environments 100A to 100C may include at least one of a legacy network and a 5G network. The legacy network includes, for example, a 4G or LTE base station 450 (eg, eNodeB) of the 3GPP standard supporting wireless access with the electronic device 101 and an evolved packet (EPC) managing 4G communication. core) (451). The 5G network, for example, manages 5G communication of the New Radio (NR) base station 450 (eg, gNodeB (gNB)) and the electronic device 101 supporting wireless access with the electronic device 101. It may include a 5GC (452) (5th generation core) that

According to various embodiments, the electronic device 101 may transmit and receive a control message and user data through legacy communication and/or 5G communication. The control message is, for example, a message related to at least one of security control, bearer setup, authentication, registration, or mobility management of the electronic device 101 . can include User data may mean, for example, user data excluding control messages transmitted and received between the electronic device 101 and the core network 430 (eg, the EPC 442).

Referring to FIG. 4A , the electronic device 101 according to an embodiment uses at least a portion of a legacy network (eg, an LTE base station 440 and an EPC 442) to at least a portion of a 5G network (eg, an LTE base station 440). At least one of a control message and user data may be transmitted and received with the NR base station 450 and the 5GC 452.

According to various embodiments, the network environment 100A provides wireless communication dual connectivity (multi-radio access technology (RAT) dual connectivity, MR-DC) to the LTE base station 440 and the NR base station 450, and EPC It may include a network environment for transmitting and receiving control messages with the electronic device 101 through one of the core networks 430 of 442 or 5GC 452 .

According to various embodiments, in an MR-DC environment, one of the LTE base station 440 or the NR base station 450 operates as a master node (MN) 410 and the other secondary node (SN) 420 can work as The MN 410 may be connected to the core network 430 to transmit and receive control messages. The MN 410 and the SN 420 are connected through a network interface and can transmit/receive messages related to radio resource (eg, communication channel) management.

According to various embodiments, the MN 410 may include the LTE base station 450, the SN 420 may include the NR base station 450, and the core network 430 may include the EPC 442. For example, control messages may be transmitted and received through the LTE base station 440 and the EPC 442, and user data may be transmitted and received through the LTE base station 450 and the NR base station 450.

Referring to FIG. 4B , according to various embodiments, the 5G network may independently transmit and receive control messages and user data to and from the electronic device 101 .

Referring to FIG. 4C , a legacy network and a 5G network according to various embodiments may independently provide data transmission and reception. For example, the electronic device 101 and the EPC 442 may transmit and receive control messages and user data through the LTE base station 450 . For another example, the electronic device 101 and the 5GC 452 may transmit and receive control messages and user data through the NR base station 450 .

According to various embodiments, the electronic device 101 may be registered with at least one of the EPC 442 and the 5GC 452 to transmit and receive control messages.

According to various embodiments, the EPC 442 or the 5GC 452 may manage communication of the electronic device 101 by interworking. For example, movement information of the electronic device 101 may be transmitted and received through an interface between the EPC 442 and the 5GC 452 .

5A is a diagram illustrating an electronic device and a cellular network according to various embodiments of the present invention.

According to various embodiments of the present invention, cellular network 500 includes a first node (eg, NR base station 450 in FIG. 4B) and/or a second node (eg, master node 410 in FIG. 4A). can do.

According to various embodiments of the present invention, the first node 450 may be a base station supporting first cellular communication. The first cellular communication is any one communication method among various cellular communication methods supportable by the electronic device 101, and may mean, for example, a communication method on the second cellular network 294 of FIG. 2 . For example, the first cellular communication may be a communication method using a 5G mobile communication method (eg, new radio). According to an embodiment, the first node 450 may be a base station supporting a standalone mode supported by the first cellular communication. The single mode may be a mode in which the electronic device 101 transmits or receives data using a base station supporting the first cellular communication. The electronic device 101 may transmit or receive data by being connected to the first node 450 .

According to various embodiments of the present invention, the second node 410 may be a base station supporting second cellular communication. The second cellular communication is any one communication method among various cellular communication methods supportable by an electronic device (eg, the electronic device 101 of FIG. 1 ), for example, communication on the first cellular network 292 of FIG. 2 . can mean the way For example, the second cellular communication may be a communication method using a 4G mobile communication method (eg, long term evolution).

According to various embodiments of the present invention, the first cellular communication may be cellular communication that performs data communication using a relatively higher frequency band than the second cellular communication. The frequency band of the first cellular communication may have a higher frequency band than the frequency band of the second cellular communication. The first node 450 supporting the first cellular communication may have a relatively small coverage compared to the second node 410 supporting the second cellular communication due to characteristics of a high frequency band.

According to various embodiments of the present invention, the cellular network 500 may support call connection (eg, voice over LTE, VoLTE) using the second cellular communication due to the nature of the first cellular communication. When performing call connection, the electronic device 101 may perform call connection through second cellular communication. The electronic device 101, while connected to the first node 450 through the first cellular communication, disconnects the first cellular communication to perform call connection, and connects to the second node 450 through the second cellular communication. 410 may be connected (eg, evolved packet server (EPS) fallback). The electronic device 101 may receive or transmit data received through the call connection or data transmitted through the call connection through the second node 410 .

According to various embodiments of the present disclosure, the electronic device 101 performs a call connection through short-range wireless communication (eg, Wi-Fi) while connected to the first node 450 through first cellular communication. may be The electronic device 101 considers the instability of the call connection through the short-range wireless communication, and in order to wait for a change from the call connection through the short-range wireless communication to the call connection through the second cellular communication, the electronic device 101 performs the first cellular communication Disconnection and connection of the second cellular communication may be performed.

According to various embodiments of the present disclosure, after disconnecting the call connection, the electronic device 101 may disconnect the second cellular communication and connect the first cellular communication. When disconnecting the second cellular communication, the electronic device 101 may perform an operation of releasing the second cellular communication (local release) without exchanging a separate message with the cellular network 500 . Since the cellular network 500 does not receive a separate message, it cannot determine whether the electronic device 101 has disconnected the second cellular communication, and the electronic device 101, the cellular network 500 A situation may occur in which data (eg, control message, user data, and/or paging message) transmitted through the second cellular communication cannot be received. After the call connection is terminated, the electronic device 101 may search for a node (eg, the first node 450) supporting the first cellular communication. Assuming a situation in which the electronic device 101 is within the coverage of the first node 450 when performing call connection, but is outside the coverage of the first node 450 after the call connection is terminated, the electronic device 101 ) fails to search for the first node 450 (eg, scan fail declared) or fails to register the first cellular communication through the first node 450 even if the search for the first node 450 succeeds. (e.g. NR regi fail).

According to various embodiments of the present disclosure, when the first cellular communication connection fails, the electronic device 101 re-connects the second cellular communication, and the electronic device 101 performs TAU (tracking) with a network supporting the second cellular communication. area update) procedure. The TAU procedure may be a procedure allowing a network supporting second cellular communication to track the location of the electronic device 101 . As the electronic device 101 reconnects the second cellular communication, it can receive data again from the network through the second cellular communication.

The electronic device 101 disconnects the second cellular communication (local release), attempts to connect the first cellular communication, and performs a connection failure of the first cellular communication. It may be in a state in which data cannot be received and/or transmitted until the connection is performed again. In the situation described above, as the electronic device 101 disconnects the call, the electronic device 101 disconnects the second cellular communication and connects through the first cellular communication regardless of whether the connection through the first cellular communication is possible. may occur by performing

5B is a diagram illustrating operations according to call connection and call disconnection by an electronic device according to various embodiments of the present disclosure.

According to various embodiments of the present disclosure, an electronic device (eg, the electronic device 101 of FIG. 5A ), in operation 521, sends a call connection request message (eg, SIP (session session) to the IP multimedia subsystem (IMS) server 510. SIP invite message) defined in Initiation protocol) can be transmitted.

The IMS server 510 may be a server that controls various functions related to calls. The IMS server 510 is an external electronic device (eg, the external electronic device 104 of FIG. 1) connected to the electronic device 101 through a call connection and exchanged in negotiation for a call connection between the electronic device 101. Data may be transmitted to the electronic device 101 or the external electronic device 104 .

Although the electronic device 101 is illustrated as transmitting the call connection request message to the IMS server 510, the electronic device 101 may receive the call connection request message from the IMS server 510. The electronic device 101 may receive a call connection request message from the IMS server 510 while connected to the first network (eg, the 5GC 452 of FIG. 4C) through the first cellular communication.

According to various embodiments of the present disclosure, the electronic device 101, in operation 522, upon reception of the call connection request message, releases a radio resource control (RRC) connection with the first network 452 (RRC release). can

According to various embodiments of the present disclosure, the electronic device 101 may disconnect the first cellular communication as the RRC connection with the first network 452 is disconnected.

According to various embodiments of the present disclosure, in operation 523, the electronic device 101 releases an RRC connection with a second network (eg, the EPC 442 of FIG. 4C) as it disconnects from the first network 452. can be performed.

According to various embodiments of the present disclosure, the electronic device 101 may perform an RRC connection with the second network 442 as part of a second cellular communication connection operation. The electronic device 101 may perform an RRC connection with the second network 442 and receive an RRC reconfiguration message transmitted by the second network 442 . The electronic device 101, based on the information for connection of the second cellular communication included in the RRC reconfiguration message, the node supporting the second cellular communication through the second cellular communication (eg, the second node of FIG. 5A ( 410)).

According to various embodiments of the present disclosure, in operation 524, the electronic device 101 may perform a call connection with the IMS server 510 through second cellular communication. The electronic device 101 may perform a video call or a voice call through a call channel with the external electronic device 104 through second cellular communication.

According to various embodiments of the present disclosure, in operation 525, the electronic device 101 may terminate the call connection with the IMS server 510 through the second cellular communication. The electronic device 101 may terminate the call connection with the IMS server 510 using a call connection termination message (eg, BYE) defined in the SIP protocol.

According to various embodiments of the present disclosure, in operation 526, the electronic device 101 may disconnect the second cellular communication upon termination of the call connection.

According to various embodiments of the present disclosure, after disconnecting the call connection, the electronic device 101 may disconnect the second cellular communication and connect the first cellular communication. When disconnecting the second cellular communication, the electronic device 101 disconnects the second cellular communication without exchanging a separate message (eg, a message for disconnecting the second cellular communication) with the second network 442 . A release operation (local release) can be performed. Since the second network 442 does not receive a separate message, it cannot determine whether the electronic device 101 has disconnected the second cellular communication, and the electronic device 101 is unable to determine whether the second network 442 has disconnected the second cellular communication. A situation in which data (eg, control message, user data, and/or paging message) transmitted through the second cellular communication may not be received.

According to various embodiments of the present disclosure, in operation 527, the electronic device 101 may scan a node supporting the first cellular communication as the second cellular communication is disconnected.

After the call connection is terminated, the electronic device 101 may search for a node (eg, the first node 450 of FIG. 5A ) supporting the first cellular communication. When the electronic device 101 searches for a node supporting the first cellular communication, the electronic device 101 includes the message for measuring the first cellular communication received from the second node (eg, the second node 410 of FIG. 5A ). A node may be searched using a database (eg, acq DB) including a connected frequency band and/or connection history of the first cellular communication stored in the electronic device 101 . Alternatively, when the electronic device 101 searches for a node supporting the first cellular communication, the electronic device 101 selects a node supporting the first cellular communication by using all of the frequency bands of the first cellular communication that can be supported by the electronic device 101. You can search.

Assuming a situation in which the electronic device 101 is within the coverage of the first node 450 when performing call connection, but is outside the coverage of the first node 450 after the call connection is terminated, the electronic device 101 ) fails to search for the first node 450 (eg, scan fail declared) or fails to register the first cellular communication through the first node 450 even if the search for the first node 450 succeeds. (e.g. NR regi fail).

According to various embodiments of the present disclosure, in operation 528, the electronic device 101 may reconnect second cellular communication as the first cellular communication connection fails.

According to various embodiments of the present disclosure, in operation 529, the electronic device 101 may perform a tracking area update (TAU) procedure with the second network 442 through second cellular communication.

The TAU procedure may be a procedure allowing a network supporting second cellular communication to track the location of the electronic device 101 . As the electronic device 101 reconnects the second cellular communication, it can receive data again from the network through the second cellular communication.

The electronic device 101 disconnects the second cellular communication (local release), attempts to connect the first cellular communication, and performs a connection failure of the first cellular communication. It may be in a state in which data cannot be received and/or transmitted until the connection is performed again. In the situation described above, as the electronic device 101 disconnects the call, the electronic device 101 disconnects the second cellular communication and connects through the first cellular communication regardless of whether the connection through the first cellular communication is possible. may occur by performing

Hereinafter, an embodiment for minimizing a period in which the electronic device 101 cannot receive or transmit data after disconnection of a call connection will be described.

6 is a diagram illustrating an electronic device according to various embodiments of the present disclosure.

Referring to FIG. 6 , an electronic device (eg, the electronic device 101 of FIG. 1) according to various embodiments of the present disclosure includes a first communication circuit (eg, the wireless communication module 192 of FIG. 1) 610, A second communication circuit (e.g., wireless communication module 192 of FIG. 1) 620 and/or a processor (e.g., processor 120 of FIG. 1, first communication processor 212 of FIG. 2 and/or FIG. 2 It may include a second communication processor 242) 630 of.

According to various embodiments of the present invention, the first communication circuit 610 is a communication circuit that supports first cellular communication, and is an external electronic device (eg, the external electronic device 104 of FIG. 1) through the first cellular communication. Communication with may be provided to the electronic device 101 . The first cellular communication is any one communication method among various cellular communication methods supportable by the electronic device 101, and may mean, for example, a communication method on the second cellular network 294 of FIG. 2 . For example, the first cellular communication may be a communication method using a 5G mobile communication method (eg, new radio). According to an embodiment, the first node 450 may be a base station supporting a standalone mode supported by the first cellular communication. The single mode may be a mode in which the electronic device 101 transmits or receives data using a base station supporting the first cellular communication. The electronic device 101 may transmit or receive data by being connected to the first node 450 .

According to various embodiments of the present disclosure, the second communication circuit 620 is a communication circuit supporting second cellular communication, and provides the electronic device 101 with communication with the external electronic device 104 through the second cellular communication. can do. The second cellular communication is any one communication method among various cellular communication methods supportable by an electronic device (eg, the electronic device 101 of FIG. 1 ), for example, communication on the first cellular network 292 of FIG. 2 . can mean the way For example, the second cellular communication may be a communication method using a 4G mobile communication method (eg, long term evolution).

According to various embodiments of the present invention, the processor 630 may be operatively coupled with the first communication circuit 610 and/or the second communication circuit 620 . The processor 630 may control components of the electronic device 101 . For example, the processor 630 may control components of the electronic device 101 according to one or more instructions stored in a memory (eg, the memory 130 of FIG. 1 ).

According to various embodiments of the present invention, the processor 630, while connected to a network (eg, the first network 452 of FIG. 5B) through first cellular communication, sends a call connection request message (eg, SIP (session) The SIP invite message defined in the initiation protocol) is received from the IMS server (eg, the IMS server 510 of FIG. 5B) or the first communication circuit 610 is configured to transmit a call connection request message to the IMS server 510. You can control it.

According to various embodiments of the present invention, the processor 630 may, while connected to the first cellular communication, disconnect the first cellular communication in response to transmission and/or reception of a call connection request message. Circuit 610 can be controlled.

The processor 630 may control the first communication circuit 610 to transmit an RRC connection release message to the first network 452 for disconnection of the first cellular communication.

The processor 630 may control the second communication circuit 620 to connect the second cellular communication according to the disconnection of the first cellular communication. The processor 630 may control the second communication circuit 620 to transmit an RRC connection request message to the second network 442 as part of an operation of performing a second cellular communication connection. The processor 630 may perform an RRC connection with the second network 442 and receive an RRC reconfiguration message transmitted by the second network 442 . The electronic device 101, based on the information for connection of the second cellular communication included in the RRC reconfiguration message, the node supporting the second cellular communication through the second cellular communication (eg, the second node of FIG. 5A ( 410)).

Alternatively, the processor 630 transmits a call connection request message (eg, a SIP invite message defined in Session Initiation Protocol (SIP)) to an IMS server (eg, FIG. The second communication circuit 620 may be controlled to be received from the IMS server 510 of 5b or to transmit the call connection request message to the IMS server 510. When the electronic device 101 receives the call connection request message through the second cellular communication, the release operation of the first cellular communication may be omitted and the connection with the network 452 through the second cellular communication may be maintained. there is.

According to various embodiments of the present invention, as the second cellular communication connection is performed, the processor 630 exchanges a message for call connection negotiation with the IMS server 510 and uses parameters set in the call connection negotiation. to create a call channel. The processor 630 may control the second communication circuit 620 to exchange data with the external electronic device 104 through the created call channel.

According to various embodiments of the present disclosure, the processor 630 may receive various types of information through second cellular communication during or after call connection.

The processor 630 may receive system information (system information block) through second cellular communication. The system information is information broadcast by a node (eg, the second node 410) supporting second cellular communication, and may include SIB 24 defined in 3GPP TS 36.331 v15.6. SIB 24 is identification information of a node (eg, the first node 450) supporting first cellular communication among nodes adjacent to the second node 410, and a frequency supported by the node 450 supporting first cellular communication. Band and/or physical identification information of the node 450 supporting the first cellular communication.

The processor 630 may receive information (eg, measurement configuration) related to quality measurement of the first cellular communication through the second cellular communication. Information related to measuring the quality of the first cellular communication may be included in the RRC reconfiguration message. The information related to measuring the quality of the first cellular communication includes a measurement object related to a node (eg, the first node 450) supporting the first cellular communication and/or a report object of the measurement result. May contain relevant information.

The measurement target is information required for the electronic device 101 to perform measurement, and includes frequency band information (eg, channel information) and/or frequency band information for performing node search and quality measurement of the searched node. It may include identification information (eg, physical cell ID) of a node that outputs a signal of a frequency band.

The reporting condition is a condition for reporting the measured quality, and includes identification information of an event (e.g., B1 event, B2 event) related to quality reporting, a specified value (threshold) related to the quality of a signal transmitted by a node, and/or quality. It may include a time to maintain the satisfaction of the condition related to (time to trigger, TTT).

According to various embodiments of the present disclosure, the processor 630 may check whether information related to the measurement of the quality of the first cellular communication is received after the call connection is terminated, in response to the call connection termination. The processor 630 determines the quality of the first cellular communication based on the frequency band included in the information related to measuring the quality of the first cellular communication, in response to receiving the information related to measuring the quality of the first cellular communication after the call connection is terminated. It is possible to control the first communication circuit 610 to measure . The processor 630 may check whether the measured quality satisfies the reporting condition and, based on whether the measured quality satisfies the reporting condition, perform first cellular communication connection. The processor 630 may transmit a quality measurement result of the first cellular communication to the second network 442 as part of an operation of performing a connection of the first cellular communication. The second node 410 connected to the second network 442 or the electronic device 101 selects a node to which the electronic device 101 is connected based on the measurement result transmitted by the electronic device 101, and selects the selected node. A message indicating a connection with may be transmitted to the electronic device 101 through second cellular communication. In response to receiving the message, the processor 630 may perform an operation for connection between the electronic device 101 and a node to be connected (eg, the first node 450 supporting first cellular communication).

According to various embodiments of the present invention, the processor 630 connects the second cellular communication in response to not receiving information related to measuring the quality of the first cellular communication or the quality measurement result not satisfying the reporting condition. can keep

The processor 630 may not perform an operation of releasing the second cellular communication (local release) without exchanging a separate message with the second network 442 as part of an operation of maintaining the connection of the second cellular communication.

According to various embodiments of the present invention, the processor 630 may perform at least one condition including a condition related to whether or not system information that can be received through the second cellular communication is received while maintaining the second cellular communication connection. Whether to release the second cellular communication may be determined based on whether the above conditions are satisfied.

According to various embodiments of the present invention, the condition related to whether system information that can be received through the second cellular communication is received is information of a node (eg, the first node 450) capable of supporting the first cellular communication. may include a condition related to whether or not a system information block (SIB) 24 including Based on receiving the system information, the processor 630 may determine to release the second cellular communication. Based on not receiving the system information, the processor 630 may determine to maintain the connection of the second cellular communication.

According to various embodiments of the present invention, at least one condition may include a condition related to the size of data to be received through the second cellular communication. The condition related to the size of data to be received through the second cellular communication may include a condition that the size of data to be received through the second cellular communication is equal to or less than a specified size (eg, 2 Mbps). When the size of data to be received through the second cellular communication is greater than or equal to the specified size, failure in receiving the data to be received may occur due to switching of the first cellular communication. The processor 630 may determine to release the second cellular communication based on the fact that the size of data to be received through the second cellular communication is less than (or less than) the specified size. The processor 630 may determine to maintain the connection of the second cellular communication based on the fact that the size of data to be received through the second cellular communication exceeds (or is greater than) the specified size.

According to various embodiments of the present disclosure, the processor 630 may activate a timer for processing data (or packets) to be received through the second cellular communication in response to the end of the call connection. The processor 630 may perform a reception operation of data to be received through the second cellular communication while maintaining the connection of the second cellular communication for a specified time using a timer. The processor 630 may disconnect the second cellular communication in response to expiration of the specified time.

According to various embodiments of the present disclosure, at least one condition may include a condition related to whether the second cellular communication supports a non-standalone mode (NSA). The non-standalone mode may be a mode in which the electronic device 101 transmits or receives data using a base station supporting first cellular communication and/or a base station supporting second cellular communication. The processor 630 may determine to release the second cellular communication based on the fact that the second cellular communication does not support the non-standalone mode. The processor 630 may determine to maintain the second cellular communication based on confirming that the connected second cellular communication supports the non-standalone mode and that the first cellular communication and the second cellular communication are connected together. According to various embodiments, the processor 630 may control the first communication circuit 610 to connect the first cellular communication based on satisfying one or more conditions. The processor 630 may disconnect the second cellular communication before connecting the first cellular communication.

According to various embodiments of the present disclosure, as part of an operation of disconnecting the second cellular communication, the processor 630 may perform a tracking area update (TAU) procedure with a network supporting the second cellular communication. The TAU procedure may be a procedure allowing a network supporting second cellular communication to track the location of the electronic device 101 .

The processor 630 may transmit a message requesting a TAU procedure (eg, a tracking area request message) to the second network 442 . The processor 630 may prevent the second network 442 from transmitting data to the electronic device 101 through the second cellular communication by setting the active flag of fields included in the message requesting the TAU procedure to 0. can

According to various embodiments of the present invention, the processor 630 may perform an RRC connection release operation with the second network 442 after the TAU procedure. The processor 630 is in an active mode (or connected mode) capable of transmitting/receiving data with the second network 442 through an RRC connection release operation, and in an inactive mode (not capable of transmitting/receiving data with the second network 442) Or, it can be switched to idle mode). The processor 630 may receive an RRC connection release message from the second network 442 as part of an RRC connection release operation. The processor 630 may receive a redirection indication from the second network 442 together with the RRC connection release message. In response to receiving the redirection instruction, the processor 630 may perform connection of the first cellular communication based on information for connection of the first cellular communication included in the redirection instruction. The information for connection of the first cellular communication may include a frequency band of a node (eg, the first node 450) supporting the first cellular communication. The processor 630 performs a search for a node to be connected using the frequency band included in the information for connection of the first cellular communication, and performs a redirection procedure for the searched node to establish the connection of the first cellular communication. can be done

According to various embodiments of the present invention, the processor 630, while receiving the RRC connection release message, in response to not receiving the redirection message, based on the information for connection of the first cellular communication included in the system information Connection of the first cellular communication may be performed. The information for connection of the first cellular communication may include a frequency band of a node (eg, the first node 450) supporting the first cellular communication. The processor 630 performs a search for a node to be connected using a frequency band included in the information for connection of the first cellular communication, and performs a reselection procedure on the searched node to obtain the first cellular communication information. A connection of communication can be performed.

Through the method described above, the electronic device 101 does not immediately disconnect the second cellular communication after the call connection is disconnected, but disconnects the second cellular communication only when at least one or more conditions are satisfied. , it is possible to minimize a period in which data cannot be received or transmitted after the call connection is disconnected.

According to various embodiments of the present disclosure, the processor 630 may maintain the second cellular communication connection based on not satisfying at least one condition. The processor 630 may check whether at least one condition is satisfied for each designated time (eg, 5 seconds or 10 seconds) while maintaining the connection of the second cellular communication. The processor 630 may disconnect the second cellular communication and connect the first cellular communication based on whether at least one or more conditions are satisfied at each designated time.

FIG. 7 is a diagram illustrating an embodiment 700 in which an electronic device according to various embodiments of the present disclosure performs a first cellular communication connection according to whether a specified condition is satisfied after a call connection is terminated.

According to various embodiments of the present invention, a processor (eg, the processor 630 of FIG. 6 ) may be classified into physical and/or software components according to functions that can be performed. The processor 630 includes an IP multimedia sub-system (IMS) stack 631 performing functions related to call connection and disconnection, a first cellular communication stack 632 performing functions related to first cellular communication, and/or A second cellular communication stack 633 performing functions related to second cellular communication may be included.

According to various embodiments of the present invention, in operation 701, the IMS stack 631 sends a call connection request message (eg, a SIP invite message defined in session initiation protocol (SIP)) to an IMS server (eg, the IMS of FIG. 5B). server 510).

Although the IMS stack 631 is shown as transmitting the call connection request message to the IMS server 510, the IMS stack 631 may receive the call connection request message from the IMS server 510. The IMS stack 631 may receive a call connection request message from the IMS server 510 while connected to the first network (eg, the 5GC 452 of FIG. 4C) through the first cellular communication.

According to various embodiments of the present disclosure, in operation 702, the first cellular communication stack 632 and the first network (eg, the first network 452 of FIG. 5B) may release the RRC connection.

According to various embodiments of the present disclosure, the electronic device 101 may disconnect the first cellular communication as the RRC connection with the first network 452 is disconnected.

According to various embodiments of the present disclosure, in operation 703, the second cellular communication stack 633 may perform a second cellular communication connection with a second network (eg, the second network 442 of FIG. 5B). there is.

According to various embodiments of the present disclosure, the second cellular communication stack 633 may perform an RRC connection with the second network 442 as part of an operation of connecting second cellular communication. The second cellular communication stack 633 may perform an RRC connection with the second network 442 and receive an RRC reconfiguration message transmitted by the second network 442 . The second cellular communication stack 633 is configured to support a second cellular communication through the second cellular communication based on the information for connection of the second cellular communication included in the RRC reconfiguration message (eg, the first node of FIG. 5A ). 2 node 410) can be connected.

According to various embodiments of the present disclosure, when the electronic device 101 receives and/or transmits a call connection request message while connected through the second cellular communication, the first cellular communication in operations 702 to 703 is performed. Release operation can be omitted.

According to various embodiments of the present invention, in operation 704, the IMS stack 631 may perform a call connection with the IMS server 510 through second cellular communication.

The electronic device 101 may perform a video call or a voice call through a call channel with the external electronic device 104 through second cellular communication.

According to various embodiments of the present invention, in operation 705, the IMS stack 631 may perform a series of operations for terminating the call connection with the IMS server 510.

The IMS stack 631 may terminate the call connection with the IMS server 510 using a call connection termination message (eg, BYE) defined in the SIP protocol.

According to various embodiments of the present disclosure, the second cellular communication stack 633 may maintain the connection of the second cellular communication in response to termination of the call connection. The second cellular communication stack 633 does not perform an operation of releasing the second cellular communication (local release) without exchanging a separate message with the second network 442 as part of an operation of maintaining the connection of the second cellular communication. may not be

According to various embodiments of the present invention, in operation 706, the second cellular communication stack 633 determines whether or not system information that can be received through the second cellular communication is received while the second cellular communication connection is maintained. It is possible to check whether at least one or more conditions including related conditions are satisfied.

According to various embodiments of the present invention, the condition related to whether system information that can be received through the second cellular communication is received is information of a node (eg, the first node 450) capable of supporting the first cellular communication. may include a condition related to whether or not a system information block (SIB) 24 including The second cellular communication stack 633 may determine to release the second cellular communication based on receiving the system information. Based on not receiving the system information, the second cellular communication stack 633 may determine to maintain the second cellular communication connection.

According to various embodiments of the present invention, at least one condition may include a condition related to the size of data to be received through the second cellular communication. The condition related to the size of data to be received through the second cellular communication may include a condition that the size of data to be received through the second cellular communication is equal to or less than a specified size (eg, 2 Mbps). When the size of data to be received through the second cellular communication is greater than or equal to the specified size, failure in receiving the data to be received may occur due to switching of the first cellular communication. The second cellular communication stack 633 may determine to release the second cellular communication based on the fact that the size of data to be received through the second cellular communication is less than (or less than) the specified size. The second cellular communication stack 633 may determine to maintain the connection of the second cellular communication based on the fact that the size of data to be received through the second cellular communication exceeds (or exceeds) the specified size.

According to various embodiments of the present disclosure, the electronic device 101 may activate a timer for processing data (or packets) to be received through the second cellular communication in response to call connection termination. The electronic device 101 may perform a reception operation of data to be received through the second cellular communication while maintaining the connection of the second cellular communication for a specified time using a timer. The electronic device 101 may disconnect the second cellular communication in response to expiration of the specified time.

According to various embodiments of the present disclosure, at least one condition may include a condition related to whether the second cellular communication supports a non-standalone mode (NSA). The non-standalone mode may be a mode in which the electronic device 101 transmits or receives data using a base station supporting first cellular communication and/or a base station supporting second cellular communication. The second cellular communication stack 633 may determine to release the second cellular communication based on the fact that the second cellular communication does not support the non-exclusive mode. The second cellular communication stack 633 may determine to maintain the second cellular communication based on confirmation that the connected second cellular communication supports a non-standalone mode and that the first cellular communication and the second cellular communication are connected together. .

According to various embodiments of the present disclosure, the second cellular communication stack 633 may control the first communication circuit 610 to connect the first cellular communication based on the satisfaction of one or more conditions.

According to various embodiments of the present disclosure, the second cellular communication stack 633 may maintain the second cellular communication connection based on the fact that one or more conditions are not satisfied (operation 706-N). The second cellular communication stack 633 may check whether at least one or more conditions are satisfied every designated time (eg, 5 seconds, 10 seconds) while maintaining the second cellular communication connection. The second cellular communication stack 633 may disconnect the second cellular communication and connect the first cellular communication based on whether at least one or more conditions are satisfied at each designated time.

According to various embodiments of the present disclosure, in operation 707, the second cellular communication stack 633 may disconnect the second cellular communication based on satisfying one or more conditions (operation 706-Y). The second cellular communication stack 633 may disconnect the second cellular communication before connecting the first cellular communication.

According to various embodiments of the present disclosure, in operation 708, the second cellular communication stack 633 may perform a tracking area update (TAU) operation with the second network 442.

According to various embodiments of the present invention, the second cellular communication stack 633 may perform a tracking area update (TAU) procedure with a network supporting the second cellular communication as part of an operation of disconnecting the second cellular communication. can The TAU procedure may be a procedure allowing a network supporting second cellular communication to track the location of the electronic device 101 .

The second cellular communication stack 633 may transmit a message requesting a TAU procedure (eg, a tracking area request message) to the second network 442 . The second cellular communication stack 633 sets the active flag of the field included in the message requesting the TAU procedure to 0, so that the second network 442 transmits data to the electronic device 101 through the second cellular communication. You can choose not to send it.

According to various embodiments of the present disclosure, in operation 709, the second cellular communication stack 633 may search for a node supporting the first cellular communication based on system information received during or after call connection. .

According to various embodiments of the present disclosure, the second cellular communication stack 633 may perform first cellular communication connection based on information for first cellular communication connection included in system information. The information for connection of the first cellular communication may include a frequency band of a node (eg, the first node 450) supporting the first cellular communication. The second cellular communication stack 633 searches for a node to be connected using the frequency band included in the first cellular communication connection information, and performs a reselection procedure on the searched node. It is possible to perform the connection of the first cellular communication through.

According to various embodiments of the present disclosure, in operation 710, the first cellular communication stack 632 may perform first cellular communication connection through the searched node.

8 is an embodiment (800) in which an electronic device according to various embodiments of the present invention performs a first cellular communication connection or maintains a second cellular communication connection according to whether a specified condition is satisfied after a call connection is terminated. ) is a drawing showing.

According to various embodiments of the present disclosure, the electronic device (eg, the electronic device 101 of FIG. 6 ), in operation 801, sends a call connection request message (eg, a SIP invite message defined in session initiation protocol (SIP)). It may be transmitted to an IMS server (eg, the IMS server 510 of FIG. 5B).

According to various embodiments of the present disclosure, in operation 803, the electronic device 101 may disconnect the first cellular communication.

According to various embodiments of the present disclosure, the electronic device 101 transmits and/or receives a call connection request message while connected to a network (eg, 5GC 452 of FIG. 4C) through first cellular communication. Correspondingly, the first cellular communication may be disconnected, and the second cellular communication may be connected.

According to various embodiments of the present disclosure, the electronic device 101 may disconnect the first cellular communication as the RRC connection with the first network 452 is disconnected.

According to various embodiments of the present disclosure, the electronic device 101 may perform a second cellular communication connection with a second network (eg, the second network 442 of FIG. 5B ). The electronic device 101 may perform an RRC connection with the second network 442 as part of a second cellular communication connection operation. The electronic device 101 may perform an RRC connection with the second network 442 and receive an RRC reconfiguration message transmitted by the second network 442 . The electronic device 101, based on the information for connection of the second cellular communication included in the RRC reconfiguration message, the node supporting the second cellular communication through the second cellular communication (eg, the second node of FIG. 5A ( 410)).

According to various embodiments of the present disclosure, the electronic device 101 transmits and/or receives a call connection request message while connected to a network (eg, the EPC 442 of FIG. 4C) through second cellular communication. Correspondingly, the connection of the second cellular communication may be maintained.

According to various embodiments of the present disclosure, in operation 805, the electronic device 101 may perform a call connection with the IMS server 510 through second cellular communication.

The electronic device 101 may perform a video call or a voice call through a call channel with the external electronic device 104 through second cellular communication. The electronic device 101 may terminate the call connection with the IMS server 510 using a call connection termination message (eg, BYE) defined in the SIP protocol.

According to various embodiments of the present disclosure, in operation 807, the electronic device 101 sets a condition related to whether system information that can be received through the second cellular communication is received while maintaining the second cellular communication connection. It is possible to check whether at least one or more conditions including are satisfied.

According to various embodiments of the present invention, the condition related to whether system information that can be received through the second cellular communication is received is information of a node (eg, the first node 450) capable of supporting the first cellular communication. may include a condition related to whether or not a system information block (SIB) 24 including The electronic device 101 may determine to release the second cellular communication based on receiving the system information. Based on not receiving the system information, the second cellular communication stack 633 may determine to maintain the second cellular communication connection.

According to various embodiments of the present invention, at least one condition may include a condition related to the size of data to be received through the second cellular communication. The condition related to the size of data to be received through the second cellular communication may include a condition that the size of data to be received through the second cellular communication is equal to or less than a specified size (eg, 2 Mbps). When the size of data to be received through the second cellular communication is greater than or equal to the specified size, failure in receiving the data to be received may occur due to switching of the first cellular communication. The electronic device 101 may determine to release the second cellular communication based on the fact that the size of data to be received through the second cellular communication is less than (or less than) the specified size. The electronic device 101 may determine to maintain the connection of the second cellular communication based on the fact that the size of data to be received through the second cellular communication exceeds (or exceeds) the specified size.

According to various embodiments of the present disclosure, the electronic device 101 may activate a timer for processing data (or packets) to be received through the second cellular communication in response to call connection termination. The electronic device 101 may perform a reception operation of data to be received through the second cellular communication while maintaining the connection of the second cellular communication for a specified time using a timer. The electronic device 101 may disconnect the second cellular communication in response to expiration of the specified time.

According to various embodiments of the present disclosure, at least one condition may include a condition related to whether the second cellular communication supports a non-standalone mode (NSA). The non-standalone mode may be a mode in which the electronic device 101 transmits or receives data using a base station supporting first cellular communication and/or a base station supporting second cellular communication. The electronic device 101 may determine to release the second cellular communication based on the fact that the second cellular communication does not support the non-exclusive mode. The electronic device 101 may determine to maintain the second cellular communication based on confirmation that the connected second cellular communication supports the non-standalone mode and that the first cellular communication and the second cellular communication are connected together.

According to various embodiments of the present disclosure, in operation 809, the electronic device 101 may disconnect the second cellular communication based on satisfying a specified condition (operation 807-Y).

According to various embodiments of the present disclosure, in operation 811 , the electronic device 101 may perform a tracking area update (TAU) operation with the second network 442 .

According to various embodiments of the present disclosure, as part of an operation of disconnecting the second cellular communication, the electronic device 101 may perform a tracking area update (TAU) procedure with a network supporting the second cellular communication. The TAU procedure may be a procedure allowing a network supporting second cellular communication to track the location of the electronic device 101 .

The electronic device 101 may transmit a message requesting a TAU procedure (eg, a tracking area request message) to the second network 442 . The electronic device 101 sets the active flag of fields included in the message requesting the TAU procedure to 0 so that the second network 442 does not transmit data to the electronic device 101 through the second cellular communication. can do.

According to various embodiments of the present disclosure, in operation 813, the electronic device 101 may search for a node supporting the first cellular communication based on the information for connection of the first cellular communication included in the system information. .

The information for connection of the first cellular communication may include a frequency band of a node (eg, the first node 450) supporting the first cellular communication. The electronic device 101 performs a search for a node to be connected using a frequency band included in the first cellular communication connection information, and performs a reselection procedure on the searched node to perform the first cellular communication connection. A connection of cellular communication may be performed.

According to various embodiments of the present disclosure, in operation 815, the electronic device 101 may perform first cellular communication connection through the searched node.

According to various embodiments of the present disclosure, in operation 817, the electronic device 101 transmits a message related to quality measurement of the first cellular communication based on the fact that the specified condition is not satisfied (operation 807-N), and the call connection After completion, it is possible to check whether or not it has been received.

The electronic device 101 may receive information (eg, measurement configuration) related to quality measurement of the first cellular communication through the second cellular communication. Information related to measuring the quality of the first cellular communication may be included in the RRC reconfiguration message. The information related to measuring the quality of the first cellular communication includes a measurement object related to a node (eg, the first node 450) supporting the first cellular communication and/or a report object of the measurement result. May contain relevant information.

The measurement target is information required for the electronic device 101 to perform measurement, and includes frequency band information (eg, channel information) and/or frequency band information for performing node search and quality measurement of the searched node. It may include identification information (eg, physical cell ID) of a node that outputs a signal of a frequency band.

The reporting condition is a condition for reporting the measured quality, and includes identification information of an event (e.g., B1 event, B2 event) related to quality reporting, a specified value (threshold) related to the quality of a signal transmitted by a node, and/or quality. It may include a time to maintain the satisfaction of the condition related to (time to trigger, TTT).

According to various embodiments of the present disclosure, in operation 819, the electronic device 101 connects the second cellular communication based on not receiving a message related to measuring the quality of the first cellular communication (operation 817-N). can keep

According to various embodiments of the present disclosure, in operation 821, the electronic device 101 receives a message related to system information and/or quality measurement of the first cellular communication while maintaining the second cellular communication connection. Correspondingly, operations 809, 811, 813, and 815 may be performed.

According to various embodiments of the present disclosure, in operation 823, the electronic device 101 measures the quality of the first cellular communication based on receiving a message related to measuring the quality of the first cellular communication (operation 817-Y). can do.

In response to receiving information related to measuring the quality of the first cellular communication after call connection termination, the electronic device 101 determines the quality of the first cellular communication based on the frequency band included in the information related to measuring the quality of the first cellular communication. The first communication circuit 610 can be controlled to measure quality.

According to various embodiments of the present disclosure, in operation 825, the electronic device 101 may connect the first cellular communication based on the result of measuring the quality of the first cellular communication.

The electronic device 101 may check whether the measured quality satisfies the reporting condition, and based on whether the measured quality satisfies the reporting condition, connect the first cellular communication. The electronic device 101 may transmit a quality measurement result of the first cellular communication to the second network 442 as part of an operation of connecting the first cellular communication. The second node 410 connected to the second network 442 or the electronic device 101 selects a node to which the electronic device 101 is connected based on the measurement result transmitted by the electronic device 101, and selects the selected node. A message indicating a connection with may be transmitted to the electronic device 101 through second cellular communication. In response to receiving the message, the electronic device 101 may perform an operation for connection between the electronic device 101 and a node to be connected (eg, the first node 450 supporting first cellular communication).

Referring to the embodiments described above, the electronic device 101 determines whether or not system information is received, whether or not information for measuring the quality of the first cellular communication during call connection is received, and/or whether the first cellular communication after call disconnection is received. It may operate differently depending on whether information for quality measurement is received. Table 1 below summarizes the previously described examples.

Case Receiving system information Receipt of information for measuring quality of first cellular communication during call connection Receipt of information for measuring quality of first cellular communication after call disconnection how it works One O O O If the result of measuring the quality of the first cellular communication based on the information for measuring the quality of the first cellular communication after call disconnection does not satisfy the reporting condition, operations 807 to 815 are performed. 2 O O X Perform operations 807 to 815 3 O X O If the result of measuring the quality of the first cellular communication based on the information for measuring the quality of the first cellular communication after call disconnection does not satisfy the reporting condition, operations 807 to 815 are performed. 4 O X X Perform operations 807 to 815 5 X O O Quality measurement of the first cellular communication based on the information for measuring the quality of the first cellular communication after call disconnection If the quality measurement result does not satisfy the reporting condition, until the second network 442 receives the RRC release message Keep second cellular communication.
After receiving the RRC release message from the second network 442, attempting to connect the first cellular communication based on the information for measuring the quality of the first cellular communication received during or after the call connection. 6 X O X Maintaining the connection of the second cellular communication When system information or information for measuring the quality of the first cellular communication is received, attempting to connect the first cellular communication. 7 X X O Quality measurement of the first cellular communication based on the information for measuring the quality of the first cellular communication after call disconnection If the quality measurement result does not satisfy the reporting condition, until the second network 442 receives the RRC release message Keep second cellular communication.
After receiving the RRC release message from the second network 442, attempting to connect the first cellular communication based on the information for measuring the quality of the first cellular communication received during or after the call connection. 8 X X X Maintaining the connection of the second cellular communication When system information or information for measuring the quality of the first cellular communication is received, attempting to connect the first cellular communication.

An electronic device according to various embodiments of the present disclosure includes a first communication circuit supporting first cellular communication; a second communication circuit supporting a second cellular communication; and a processor, wherein the processor disconnects the first cellular communication in response to reception and/or transmission of a call connection request message while connected to a network through the first cellular communication, and the second At least one or more conditions including a condition related to whether or not system information that can be received through the second cellular communication is received in response to termination of the call connection, and controls the second communication circuit to perform cellular communication connection. It is configured to determine whether to release the second cellular communication based on whether a condition is satisfied, and to perform connection of the first cellular communication based on information for connection of the first cellular communication included in the system information. can

In the electronic device according to various embodiments of the present disclosure, the processor may control the second communication circuit to disconnect the second cellular communication based on receiving the system information.

In the electronic device according to various embodiments of the present disclosure, the processor may control the second communication circuit to maintain the connection of the second cellular communication based on not receiving the system information.

In the electronic device according to various embodiments of the present disclosure, the processor uses a frequency band included in the message on the basis of receiving a message related to measuring the quality of the first cellular communication after the call disconnection. The quality of the first cellular communication may be measured, and based on the measured quality satisfying a specified condition included in the message, the second cellular communication may be disconnected and the first cellular communication may be connected.

In the electronic device according to various embodiments of the present disclosure, the processor may be configured to control the second communication circuit to maintain the connection of the second cellular communication based on termination of the call connection.

In the electronic device according to various embodiments of the present disclosure, the processor checks a frequency band included in existing system information, and uses the frequency band to search for a node supporting the first cellular communication. can be set to control

In the electronic device according to various embodiments of the present disclosure, after the call connection is terminated, the processor receives a message related to measuring the quality of the first cellular communication, measures the quality of the first cellular communication, and performs the measurement. and control the second communication circuitry to maintain the connection of the second cellular communication based on the fact that the specified quality does not satisfy a specified condition included in the message related to measuring the quality of the first cellular communication.

In the electronic device according to various embodiments of the present disclosure, the processor may disconnect the second cellular communication and connect the first cellular communication based on the measured quality satisfying the specified condition. there is.

In the electronic device according to various embodiments of the present disclosure, the processor is configured to maintain the connection of the second cellular communication based on not receiving a message related to measuring the quality of the first cellular communication after the call connection is terminated. It can be set to control the second communication circuit.

In the electronic device according to various embodiments of the present disclosure, the at least one condition is a condition related to the size of data to be received through the second cellular communication and/or the second cellular communication supports non-standalone (NSA). It may include conditions related to whether or not to do so.

In an electronic device according to various embodiments of the present disclosure, the condition related to the size of data to be received through the second cellular communication may include a condition that the size of data received through the second cellular communication is equal to or less than a specified size. .

9 is an operation flowchart illustrating a method 900 of operating an electronic device according to various embodiments of the present disclosure.

According to various embodiments of the present disclosure, the electronic device (eg, the electronic device 101 of FIG. 6 ) sends, in operation 901, a call connection request message (eg, a SIP invite message defined in session initiation protocol (SIP)). It can be transmitted and/or received by an IMS server (eg, the IMS server 510 of FIG. 5B).

According to various embodiments of the present disclosure, in operation 903, the electronic device 101 may disconnect the first cellular communication and connect the second cellular communication.

According to various embodiments of the present disclosure, the electronic device 101 transmits and/or receives a call connection request message while connected to a network (eg, 5GC 452 of FIG. 4C) through first cellular communication. Correspondingly, the first cellular communication connection may be disconnected and the second cellular communication connection may be performed. According to various embodiments of the present disclosure, the electronic device 101 connects the first network 452 with RRC. By releasing, it is possible to disconnect the first cellular communication.

According to various embodiments of the present disclosure, the electronic device 101 may perform a second cellular communication connection with a second network (eg, the second network 442 of FIG. 5B ). The electronic device 101 may perform an RRC connection with the second network 442 as part of a second cellular communication connection operation. The electronic device 101 may perform an RRC connection with the second network 442 and receive an RRC reconfiguration message transmitted by the second network 442 . The electronic device 101, based on the information for connection of the second cellular communication included in the RRC reconfiguration message, the node supporting the second cellular communication through the second cellular communication (eg, the second node of FIG. 5A ( 410)).

According to various embodiments of the present disclosure, the electronic device 101 transmits and/or receives a call connection request message while connected to a network (eg, the EPC 442 of FIG. 4C) through second cellular communication. Correspondingly, the connection of the second cellular communication may be maintained.

According to various embodiments of the present disclosure, the electronic device 101 may perform a call connection with the IMS server 510 through second cellular communication.

The electronic device 101 may perform a video call or a voice call through a call channel with the external electronic device 104 through second cellular communication. The electronic device 101 may terminate the call connection with the IMS server 510 using a call connection termination message (eg, BYE) defined in the SIP protocol.

According to various embodiments of the present disclosure, in operation 905, the electronic device 101 sets a condition related to whether system information that can be received through the second cellular communication is received while maintaining the second cellular communication connection. It is possible to check whether at least one or more conditions including are satisfied.

According to various embodiments of the present invention, the condition related to whether system information that can be received through the second cellular communication is received is information of a node (eg, the first node 450) capable of supporting the first cellular communication. may include a condition related to whether or not a system information block (SIB) 24 including The electronic device 101 may determine to release the second cellular communication based on receiving the system information. Based on not receiving the system information, the second cellular communication stack 633 may determine to maintain the second cellular communication connection.

According to various embodiments of the present invention, at least one condition may include a condition related to the size of data to be received through the second cellular communication. The condition related to the size of data to be received through the second cellular communication may include a condition that the size of data to be received through the second cellular communication is equal to or less than a specified size (eg, 2 Mbps). When the size of data to be received through the second cellular communication is greater than or equal to the specified size, failure in receiving the data to be received may occur due to switching of the first cellular communication. The electronic device 101 may determine to release the second cellular communication based on the fact that the size of data to be received through the second cellular communication is less than (or less than) the specified size. The electronic device 101 may determine to maintain the connection of the second cellular communication based on the fact that the size of data to be received through the second cellular communication exceeds (or exceeds) the specified size.

According to various embodiments of the present disclosure, the electronic device 101 may activate a timer for processing data (or packets) to be received through the second cellular communication in response to call connection termination. The electronic device 101 may perform a reception operation of data to be received through the second cellular communication while maintaining the connection of the second cellular communication for a specified time using a timer. The electronic device 101 may disconnect the second cellular communication in response to expiration of the specified time.

According to various embodiments of the present disclosure, the at least one condition may include a condition related to whether the second cellular communication supports a non-standalone (NSA) mode. The non-standalone mode may be a mode in which the electronic device 101 transmits or receives data using a base station supporting first cellular communication and/or a base station supporting second cellular communication. The electronic device 101 may determine to release the second cellular communication based on the fact that the second cellular communication does not support the non-exclusive mode. The electronic device 101 may determine to maintain the second cellular communication based on confirmation that the connected second cellular communication supports the non-standalone mode and that the first cellular communication and the second cellular communication are connected together.

According to various embodiments of the present disclosure, in operation 907, the electronic device 101 may perform connection of the first cellular communication based on the information for connection of the first cellular communication included in the system information.

According to various embodiments of the present disclosure, the electronic device 101 may search for a node supporting the first cellular communication based on the information for connection of the first cellular communication included in the system information.

The information for connection of the first cellular communication may include a frequency band of a node (eg, the first node 450) supporting the first cellular communication. The electronic device 101 performs a search for a node to be connected using a frequency band included in the first cellular communication connection information, and performs a reselection procedure on the searched node to perform the first cellular communication connection. A connection of cellular communication may be performed.

According to various embodiments of the present disclosure, the electronic device 101 may perform first cellular communication connection through the searched node.

An operating method of an electronic device according to various embodiments of the present disclosure is directed to disconnecting the first cellular communication in response to reception of a call connection request message while connected to a network through the first cellular communication, and performing a second cellular communication operation. an operation of performing connection of communication; In response to the termination of the call connection, determining whether to release the second cellular communication based on whether or not at least one condition including a condition related to whether system information received through the second cellular communication is satisfied movement; and performing connection of the first cellular communication based on information for connection of the first cellular communication included in the system information.

In the operating method of an electronic device according to various embodiments of the present disclosure, the determining whether to disconnect the second cellular communication includes disconnecting the second cellular communication based on receiving the system information. can do.

In the operating method of an electronic device according to various embodiments of the present disclosure, the determining whether to release the second cellular communication may include maintaining the connection of the second cellular communication based on not receiving the system information. can include

An operating method of an electronic device according to various embodiments of the present disclosure is based on receiving a message related to measuring the quality of the first cellular communication after the call disconnection, using a frequency band included in the message to determine the first cellular communication quality. measuring quality of cellular communication; and performing disconnection of the second cellular communication and connection of the first cellular communication based on the measured quality satisfying a specified condition included in the message.

The operating method of the electronic device according to various embodiments of the present disclosure may further include maintaining the second cellular communication connection based on termination of the call connection.

An operating method of an electronic device according to various embodiments of the present disclosure includes checking a frequency band included in information for connection of the first cellular communication; The method may further include searching for a node supporting the first cellular communication using the frequency band.

An operating method of an electronic device according to various embodiments of the present disclosure may include receiving a message related to quality measurement of the first cellular communication after the call connection is terminated; measuring a quality of the first cellular communication; The method may further include maintaining the connection of the second cellular communication based on the fact that the measured quality does not satisfy a specified condition included in the message related to measuring the quality of the first cellular communication.

An operating method of an electronic device according to various embodiments of the present disclosure includes maintaining the second cellular communication connection based on not receiving a message related to quality measurement of the first cellular communication after the call connection is terminated. may further include.

In the operating method of an electronic device according to various embodiments of the present disclosure, the at least one condition is a condition related to the size of data to be received through the second cellular communication and/or the second cellular communication is NSA (non-standalone) ) can be included.

Electronic devices according to various embodiments disclosed in this document may be devices of various types. The electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. An electronic device according to an embodiment of the present document is not limited to the aforementioned devices.

Various embodiments of this document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, like reference numbers may be used for like or related elements. The singular form of a noun corresponding to an item may include one item or a plurality of items, unless the relevant context clearly dictates otherwise. In this document, "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "A Each of the phrases such as "at least one of , B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof. Terms such as "first", "second", or "first" or "secondary" may simply be used to distinguish a given component from other corresponding components, and may be used to refer to a given component in another aspect (eg, importance or order) is not limited. A (e.g., first) component is said to be "coupled" or "connected" to another (e.g., second) component, with or without the terms "functionally" or "communicatively." When mentioned, it means that the certain component may be connected to the other component directly (eg by wire), wirelessly, or through a third component.

The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and is interchangeable with terms such as, for example, logic, logical blocks, parts, or circuits. can be used as A module may be an integrally constructed component or a minimal unit of components or a portion thereof that performs one or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

Various embodiments of this document provide one or more instructions stored in a storage medium (eg, internal memory 136 or external memory 138) readable by a machine (eg, electronic device 101). It may be implemented as software (eg, the program 140) including them. For example, a processor (eg, the processor 120 ) of a device (eg, the electronic device 101 ) may call at least one command among one or more instructions stored from a storage medium and execute it. This enables the device to be operated to perform at least one function according to the at least one command invoked. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' only means that the storage medium is a tangible device and does not contain a signal (e.g. electromagnetic wave), and this term refers to the case where data is stored semi-permanently in the storage medium. It does not discriminate when it is temporarily stored.

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

According to various embodiments, each component (eg, module or program) of the above-described components may include a single object or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. there is. According to various embodiments, one or more components or operations among the aforementioned corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component of the plurality of components prior to the integration. . According to various embodiments, the actions performed by a module, program, or other component are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the actions are executed in a different order, or omitted. or one or more other actions may be added.

Claims (20)

In electronic devices,
a first communication circuit supporting a first cellular communication;
a second communication circuit supporting a second cellular communication; and
contains a processor;
The processor
Controlling the second communication circuit to establish and/or maintain the connection of the second cellular communication in response to reception and/or transmission of a call connection request message while connected to a network;
In response to the termination of the call connection, whether system information including information on a node capable of supporting the first cellular communication is received through the second cellular communication while the second cellular communication connection is maintained. Determine whether to release the second cellular communication based on whether at least one condition including a condition related to is satisfied,
An electronic device configured to perform connection of the first cellular communication based on information for connection of the first cellular communication included in the system information.
According to claim 1,
The processor
An electronic device that controls the second communication circuit to disconnect the second cellular communication based on receiving the system information.
According to claim 1,
The processor
Based on not receiving the system information, the electronic device for controlling the second communication circuitry to maintain the connection of the second cellular communication.
According to claim 2,
The processor
After release of the call connection, based on receiving a message related to measuring the quality of the first cellular communication, measuring the quality of the first cellular communication using a frequency band included in the message;
An electronic device that disconnects the second cellular communication and connects the first cellular communication based on the measured quality satisfying a specified condition included in the message.
According to claim 1,
The processor
Based on termination of the call connection, the electronic device configured to control the second communication circuit to maintain the connection of the second cellular communication.
According to claim 1,
The processor
Checking the frequency band included in the system information,
An electronic device configured to control the first communication circuit to search for a node supporting the first cellular communication using the frequency band.
According to claim 1,
The processor
Receiving a message related to quality measurement of the first cellular communication after termination of the call connection;
measure the quality of the first cellular communication;
An electronic device configured to control the second communication circuit to maintain the connection of the second cellular communication based on the measured quality not satisfying a specified condition included in the message related to measuring the quality of the first cellular communication. .
According to claim 7,
The processor
An electronic device that disconnects the second cellular communication and connects the first cellular communication based on the measured quality satisfying the specified condition.
According to claim 1,
The processor
The electronic device configured to control the second communication circuit to maintain the connection of the second cellular communication based on not receiving a message related to measuring the quality of the first cellular communication after termination of the call connection.
According to claim 1,
The at least one condition is
An electronic device comprising a condition related to a size of data to be received through the second cellular communication and/or a condition related to whether the second cellular communication supports non-standalone (NSA).
According to claim 10,
A condition related to the size of data to be received through the second cellular communication is
The electronic device comprising a condition that the size of data received through the second cellular communication is less than or equal to a specified size.
In the operating method of the electronic device,
disconnecting the first cellular communication, connecting the second cellular communication, or maintaining the connection of the second cellular communication, while connected to the network, in response to receiving the call connection request message;
In response to the termination of the call connection, whether system information including information on a node capable of supporting the first cellular communication is received through the second cellular communication while the second cellular communication connection is maintained. determining whether to release the second cellular communication based on whether at least one condition including a condition related to is satisfied; and
and performing connection of the first cellular communication based on information for connection of the first cellular communication included in the system information.
According to claim 12,
The operation of determining whether to release the second cellular communication
and disconnecting the second cellular communication based on receiving the system information.
According to claim 12,
The operation of determining whether to release the second cellular communication
and maintaining the connection of the second cellular communication based on not receiving the system information.
According to claim 13,
A method of operating the electronic device
measuring the quality of the first cellular communication by using a frequency band included in the message, based on receiving a message related to measuring the quality of the first cellular communication after the call connection is released; and
and disconnecting the second cellular communication and connecting the first cellular communication, based on the measured quality satisfying a specified condition included in the message.
According to claim 13,
A method of operating the electronic device
Based on termination of the call connection, the method of operating the electronic device further comprising maintaining the second cellular communication connection.
According to claim 12,
A method of operating the electronic device
checking a frequency band included in the information for connection of the first cellular communication;
The method of operating the electronic device further comprising an operation of searching for a node supporting the first cellular communication using the frequency band.
According to claim 12,
A method of operating the electronic device
receiving a message related to quality measurement of the first cellular communication after the call connection is terminated;
measuring a quality of the first cellular communication;
Based on the fact that the measured quality does not satisfy a specified condition included in the message related to measuring the quality of the first cellular communication, maintaining the second cellular communication connection.
According to claim 12,
A method of operating the electronic device
After termination of the call connection, based on not receiving a message related to quality measurement of the first cellular communication, maintaining the second cellular communication connection.
According to claim 12,
The at least one condition is
and a condition related to a size of data to be received through the second cellular communication and/or a condition related to whether the second cellular communication supports NSA (non-standalone).

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