KR20220013762A - Electronic device supporting multiple subscriber identity modules and method for operating thereof - Google Patents

Abstract

The present invention relates to an electronic device for supporting a plurality of subscriber identification modules (SIM) to increase quality of a call and an operation method thereof. According to one embodiment of the present invention, the electronic device comprises at least one antenna module and at least one processor communicating with a plurality of SIMs included in the electronic device and communicating with a communication network and an IP multimedia subsystem (IMS) network through the at least one antenna module. The at least one processor receives a call request for a first SIM among the plurality of SIMs from an IMS server of an IMS network; transmits a response message to the call request to the IMS server; checks occurrence of a network error related to the call to the first SIM; check a second SIM preset for call forwarding among the plurality of SIMs in response to confirmation of the occurrence of the network error; and requests the call forwarding to the second SIM for the call to the IMS server. Various other embodiments are possible.

Description

ELECTRONIC DEVICE SUPPORTING MULTIPLE SUBSCRIBER IDENTITY MODULES AND METHOD FOR OPERATING THEREOF

Various embodiments relate to an electronic device supporting a plurality of subscriber identity modules (SIMs) and an operating method thereof.

In a wireless communication system, an electronic device (eg, user equipment (UE)) may access a wireless communication network and use a voice communication or data communication service while in a predetermined location or while moving. In order to provide a communication service to an electronic device, an appropriate authentication process is required. In general, a universal integrated circuit card (UICC) is inserted into an electronic device, and the electronic device and a mobile network operator (MNO) communicate with each other through a universal subscriber identity module (USIM) installed inside the UICC. Authentication is performed between servers. UICC is a subscriber identity module (SIM) card in the case of a global system for mobile communications (GSM) method, a universal subscriber identity (USIM) in the case of a wideband code division multiple access (WCDMA), long term evolution (LTE), and a new radio (NR) method. module) can be called a card.

When a user of an electronic device subscribes to a wireless communication service provided by a carrier, the carrier provides a UICC (eg, SIM card or USIM card) to the user, and the user can insert the provided UICC into his/her electronic device. have. When the UICC is inserted into the electronic device, the USIM application installed inside the UICC is executed and the same value is stored using the IMSI (international mobile subscriber identity) value stored in the UICC and the encryption key value for authentication. An appropriate authentication process may be performed with the operator's server. After an appropriate authentication process is performed, the wireless communication service can be used.

The electronic device may support two or more SIMs. When two SIMs are supported, the electronic device may be referred to as a dual SIM (dual SIM) electronic device, and a device supporting a plurality of SIMs is a multi-SIM electronic device. It can also be called a device. A dual SIM or multi-SIM electronic device may support a plurality of SIMs, and each SIM may be associated with a different subscription. A device in which one transceiver transmits and receives signals associated with a plurality of SIMs may be referred to as a dual SIM dual standby (DSDS) device. In this case, when one SIM transmits or receives a signal, the other SIM may be in the standby mode. Alternatively, a device in which both SIMs can be simultaneously activated may be referred to as a dual SIM dual active (DSDA) device.

When the electronic device fails to connect to a bearer (eg, a voice dedicated bearer) while receiving an Internet protocol (IP) multimedia subsystem (IMS) voice call from the electronic device, the electronic device transmits the call This may cause call reception to fail. Also, in the case of an IMS video call, when the video dedicated bearer connection fails, the electronic device may switch to a voice call and retry the connection or end the video call.

As another example, when an IMS server error occurs during call reception, an error code is transmitted to the electronic device through a session initiation protocol (SIP) CANCEL message and the call is terminated, so that the call reception may fail. In addition, when VoNR (Voice over NR) service starts, a situation arises where VoNR supported and non-VoNR supported operators are mixed. Good quality calls cannot be provided.

In various embodiments, a network such as a media dedicated bearer connection failure or IMS server error while receiving an IMS media call (eg, a voice call or a video call) in an electronic device supporting a plurality of subscriber identification modules (SIMs) If a normal call connection is not possible due to an error, the call can be connected normally by forwarding the call to another SIM phone number. In addition, in various embodiments, when the operator of the SIM does not support the highest priority media codec required in the received IMS media call, the call is forwarded to another SIM phone number that can support the requested IMS media call codec. Call quality can be improved.

According to various embodiments, the electronic device communicates with at least one antenna module and a plurality of subscriber identity modules (SIMs) included in the electronic device, and includes a communication network and an IMS ( at least one processor communicating with an IP multimedia subsystem (IP multimedia subsystem) network, wherein the at least one processor transmits a call request to a first subscriber identity module (SIM) among the plurality of SIMs in the IMS of the IMS network receiving from a server, transmitting a response message to the call request to the IMS server, confirming occurrence of a network error related to the call to the first SIM, and corresponding to the confirmation of the occurrence of the network error, the plurality of SIMs It is possible to check a preset second SIM for call forwarding, and control to request the call forwarding to the second SIM for the call to the IMS server.

According to various embodiments, the electronic device communicates with at least one antenna module and a plurality of subscriber identity modules (SIMs) included in the electronic device, and includes a communication network and an IMS ( at least one processor communicating with an IP multimedia subsystem (IP multimedia subsystem) network, wherein the at least one processor transmits a call request to a first subscriber identity module (SIM) among the plurality of SIMs in the IMS of the IMS network Receive from a server, check at least one codec corresponding to the call, check whether the at least one identified codec is a codec supported by the first SIM, and set the at least one checked codec to the If the first SIM does not support it, check a second SIM that supports the identified at least one codec among the plurality of SIMs, and request the IMS server to transfer the call to the second SIM for the call. can be controlled

According to various embodiments of the present disclosure, in a method of operating an electronic device, a call request to a first subscriber identity module (SIM) among a plurality of subscriber identity modules (SIMs) included in the electronic device is transmitted to the IMS of the IMS network. receiving from the server; transmitting a response message to the call request to the IMS server; confirming occurrence of a network error related to a call to the first SIM; checking a second SIM preset for call forwarding among the plurality of SIMs in response to the confirmation of the occurrence of the network error; and requesting the IMS server to transfer the call to the second SIM for the call.

According to various embodiments of the present disclosure, in a method of operating an electronic device, a call request to a first subscriber identity module (SIM) among a plurality of subscriber identity modules (SIMs) included in the electronic device is transmitted to the IMS of the IMS network. The operation of receiving from the server, the operation of checking at least one codec corresponding to the call, the operation of checking whether the checked at least one codec is a codec supported by the first SIM, the operation of checking the at least one checked codec If the codec is not supported by the first SIM, identifying a second SIM supporting the identified at least one codec among the plurality of SIMs, and forwarding the call to the second SIM for the call It may include an operation requesting to the IMS server.

According to various embodiments, a normal call connection is not established due to a network error while receiving an IMS media call (eg, a voice call or a video call) in an electronic device supporting a plurality of subscriber identification modules (SIMs) If the high-priority media codec is not supported by the receiving SIM's operator, call quality can be improved by forwarding the call to another SIM phone number that can accept the corresponding IMS media call. In addition, when receiving a call to a specific SIM, it selects and forwards the call by selecting the SIM that most suitably supports the codec requested by the session description protocol (SDP) in the Invite message among a plurality of SIMs included in the electronic device. You can connect by phone.

1A is a block diagram of an electronic device in a network environment, according to embodiments.
1B is a diagram illustrating a network environment including an electronic device, according to various embodiments of the present disclosure;
FIG. 2 is a diagram for describing a system for providing a profile-based communication connection to an electronic device according to various embodiments of the present disclosure;
3 is a block diagram of an electronic device according to various embodiments of the present disclosure;
4 is a signal flow diagram illustrating a method of registering an IMS network of an electronic device according to various embodiments of the present disclosure;
5 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure;
6 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure;
7 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure;
8 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure.
9 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure;
10 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure.
11 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure.
12 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure;
13 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure;
14 illustrates a call forward related screen displayed on a calling party electronic device according to various embodiments of the present disclosure.
15 illustrates a call forward related screen displayed on a calling party electronic device according to various embodiments of the present disclosure.

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

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

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

The memory 130 may store various data used by at least one component (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, the program 140 ) and instructions related thereto. The memory 130 may include a volatile memory 132 or a non-volatile memory 134 .

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

The input module 150 may receive a command or data to be used by a component (eg, the processor 120 ) of the electronic device 101 from the outside (eg, a user) of the electronic device 101 . The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (eg, a button), or a digital pen (eg, a stylus pen).

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

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

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

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

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

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

The haptic module 179 may convert an electrical signal into a mechanical stimulus (eg, vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic sense. According to an embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and moving images. According to an embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

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

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

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

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

The antenna module 197 may transmit or receive a signal or power to the outside (eg, an external electronic device). According to an embodiment, the antenna module 197 may include an antenna including a conductor formed on a substrate (eg, a PCB) or a radiator formed of a conductive pattern. According to an embodiment, the antenna module 197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is connected from the plurality of antennas by, for example, the communication module 190 . can be 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)) other than the radiator may be additionally formed as a part of the antenna module 197 .

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

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

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

1B is a diagram illustrating a network environment 100 including an electronic device according to various embodiments of the present disclosure. Referring to FIG. 1B , a network according to various embodiments of the present disclosure includes an electronic device 101 , a first communication network 111a , a second communication network 112a , or a third communication network 113a , a first IMS It may include a network 111b, a second IMS network 112b, and a third IMS network 113b.

According to various embodiments of the present disclosure, the electronic device 101 may include a plurality of SIMs, and a dual SIM dual standby (DSDS) or DSDS capable of simultaneously connecting two SIMs among the plurality of SIMs to different communication networks to be used. It can operate as a dual SIM dual active (DSDA). For example, two SIMs, a first SIM 111 and a second SIM 112 , can be mounted in the electronic device 101 . The first SIM 111 and the second SIM 112 may be removable rSIMs. For example, the electronic device 101 may be equipped with two SIM cards to support the two SIMs. Hereinafter, for convenience of description, the SIM card will be referred to as a SIM and used. As shown in FIG. 1B , two SIM cards, a first SIM 111 and a second SIM 112 , can be mounted in the electronic device 101 . The electronic device 101 includes a first slot (not shown) and a second slot (not shown) as a first structure therein to accommodate the first SIM 111 and the second SIM 112 , respectively. may include

For example, the first SIM 111 is a SIM subscribed to a communication service provider of the first communication network 111a, and the electronic device 101 connects to the first communication network 111a using the first SIM 111 to wirelessly Communication services can be provided. The second SIM 112 is a SIM subscribed to a communication operator of the second communication network 112a, and the electronic device 101 connects to the second communication network 112a using the second SIM 112 to provide a wireless communication service. can be provided. According to various embodiments, the electronic device 101 may include an embedded subscriber identity module (eSIM) 201 . The eSIM may be referred to as an eUICC. The electronic device 101 may receive a wireless communication service by accessing the third communication network 113a using the eSIM 201 . At least a portion of the first communication network 111a, the second communication network 112a, or the third communication network 113a may be provided by the same communication service provider, or may be provided by different communication service providers, respectively.

According to various embodiments of the present disclosure, the electronic device 101 is a first communication network 111a (eg, a communication network of a first operator), a second communication network 112a (eg, a communication network of a second operator), or a third Each of the communication networks 113a (eg, a communication network of a third-party operator) may be connected to each other or simultaneously. In addition, the electronic device 101 accesses the first IMS network 111b through the first communication network 111a, accesses the second IMS network 112b through the second communication network 112a, or 3 It is possible to connect to the third IMS network 113b through the communication network 113a. Although the plurality of communication networks are illustrated as respectively connecting to different IMS networks in FIG. 1B, according to various embodiments, the plurality of communication networks may share and access one IMS network. For example, the first communication network 111a and the second communication network 112a may be connected to the same single IMS network. The electronic device 101 may receive an IP-based voice call service or a video call service through each IMS network.

2 is a diagram for describing a system for providing a profile-based communication connection to an electronic device according to various embodiments of the present disclosure;

Referring to FIG. 2 , a system 200 according to various embodiments includes an electronic device 101 , an SM-DS server 210 , an SM-DP+ server 220 , an MNO server 230 , and a communication service server 240 . ) may be included.

According to various embodiments, the electronic device 101 (eg, the electronic device 100 of FIG. 1 ) may include the eSIM 201 . Although not illustrated for convenience of description, the electronic device 101 may include two or more slots capable of accommodating two or more rSIMs. Alternatively, the electronic device 101 may be implemented to include two eSIMs and one slot capable of accommodating one rSIM. According to various embodiments, the electronic device 101 may include or accommodate N (N is a natural number) SIMs (eSIMs or rSIMs), and may perform switching to use some of them. There is no limit to the combination of N SIMs, and there is also no limit to the number.

According to various embodiments, the eSIM 201 may be inserted into the electronic device 101 , provided integrally with the electronic device 101 , or implemented to be accessible by the electronic device 101 . According to various embodiments of the present disclosure, the eSIM 201 enables the electronic device 101 to include a mobile network operator; MNO) server and authentication can be performed. According to an embodiment, the eSIM 201 is called a subscriber identity module (SIM) card, wideband code division multiple access (WCDMA), or long term evolution (LTE), NR (long term evolution) in the case of a global system for mobile communications (GSM) scheme. In the case of a new radio) method, it may be called a universal subscriber identity module (USIM) card, and in addition to this, it may be called by various names depending on a communication method. For example, when a user of the electronic device 101 subscribes to a wireless communication service provided by a communication service provider, the electronic device 101 performs authentication with information in the eSIM 201 , for example, an international mobile subscriber identity (IMSI) value. It is possible to use the wireless communication service after performing an appropriate authentication process with the server of the communication service provider in which the same value is stored by using the K value, which is an encryption key for . For example, the appropriate authentication process may be authentication and key agreement (AKA) authentication, and other authentication methods may also be used.

According to various embodiments, the eSIM 201 may be manufactured as a dedicated card for a corresponding communication operator at the request of a specific communication operator, and authentication information (eg, USIM application and subscriber identification ID ( For example, IMSI), an encryption key (eg, a known K value or Ki value) may be preloaded. An application (or information) in the eSIM 201 may be installed, modified, deleted, or updated using a technology such as over the air (OTA) when necessary.

According to various embodiments, the eSIM 201 may download and/or store information for providing a communication service in the form of a profile. According to an embodiment, the profile may be installed or stored in a manufacturing process of the eSIM 201 , or may be downloaded by a terminal in an over the air (OTA) method and installed or stored in the eSIM 201 . For example, the profile may include a provisioning profile and an operational profile. Even if the provisioning profile is not installed, the electronic device 101 may download the operation profile through a Wi-Fi short-distance connection or an Internet connection, and the provisioning profile is essentially installed in the electronic device 101 . Those skilled in the art will understand that this need not be the case. For example, the operational profile may be a profile including subscriber identification information of a user of the electronic device, and the provisioning profile may include subscriber identification information or subscriber identification information (hereinafter also referred to as 'first subscriber identification information') in the electronic device. Information (hereinafter also referred to as “first information”) for downloading a profile (hereinafter also referred to as a 'first operational profile') including The electronic device may download the first operational profile based on the first information on the provisioning profile in the eSIM 201 .

According to various embodiments, the electronic device 101 provides subscriber identification information (hereinafter also referred to as 'second subscriber identification information') of the operational profile installed or stored in the eSIM 201 (hereinafter also referred to as 'second operational profile'). ) can be used to provide communication services. For example, the profile including subscriber identification information may be a subscriber identity module (SIM) profile.

According to an embodiment, the operational profile includes, in addition to the subscriber identification information, the subscriber's network access authentication information, the subscriber's phone book, the subscriber's personal information (eg, SMS), the name of the subscribed communication operator, the available services, and the amount of available data. , rate or service provision speed, or information enabling secure wireless communication use by performing subscriber authentication and traffic security key generation when accessing a wireless communication network such as GSM, WCDMA, LTE, or NR may be further included.

According to various embodiments, the first information for downloading data (eg, the first operational profile) including the first subscriber identification information is for a first communication connection designated for downloading the first operational profile. It may include communication session information. For example, the communication session information includes information on access to a subscription manager discovery service (SM-DS) server 210 for downloading the first operational profile or information on a communication service provider network available for access to the SM-DS server 210 . may include

According to various embodiments, the SM-DS server 210 transmits the address of the subscription manager data preparation plus (SM-DP+) server 220 from which the first operational profile can be downloaded based on the provisioning profile to the electronic device ( 101) can be provided.

According to various embodiments, the SM-DP+ server 220 is a profile providing server, an off-card entity of profile domain, a profile encryption server, a profile generating server, and a profile provisioner. Or it may be a profile provider. The SM-DP+ server 220 may perform a first communication connection 22 with the electronic device 101 through a wireless communication network based on a first communication connection request based on a provisioning profile from the electronic device 101, , the first operational profile may be provided to the electronic device 101 through the first communication connection 22 . According to various embodiments, the wireless communication network may be a specific node of the wireless communication network. For example, the wireless communication network may be a base station, a subscriber information management node, or a mobility management node of the wireless communication network. According to an embodiment, the wireless communication network may include a home location register (HLR) and/or authentication center (AuC) server that the electronic device 101 accesses and performs a subscriber authentication function, and accesses after authentication to perform voice communication Alternatively, it may be connected to a communication service server 240 capable of providing communication services such as data communication.

According to various embodiments, the mobile network operator (MNO) server 230 may be a server associated with a mobile communication network operator. According to various embodiments, the MNO server 230 prepares at least one profile (or profile package) (eg, first operational profile) associated with at least one piece of subscriber identification information (eg, first subscriber identification information). may be requested from the SM-DP+ server 220 , and information associated with the first operational profile may be transmitted to the SM-DP+ server 220 . According to an embodiment, the MNO server 230 may transmit a signal for updating and managing the first operational profile to the SM-DP+ server 220 . The MNO server 230 may allow the second communication connection 24 between the electronic device 101 and the communication service server 240 through the second operator profile installed in the eSIM 201 of the electronic device 101 . have.

According to various embodiments, the communication service server 240 may be a server that provides a communication service. According to various embodiments, the communication service may be a service associated with transmission or reception of data through a wireless communication network. According to an embodiment, the communication service transmits or receives other profiles (or data) that do not include subscriber identification information in addition to the operational profile download (eg, a first operational profile including first subscriber identification information). It may include related services. For example, the communication service server 240 may include a service server associated with various data transmission and reception, such as a server associated with each of various applications, a push server, a search server, or a market server, and communication by the communication service server 240 The service may include various services such as data transmission/reception, notification reception, push reception, link reception and access, or service request by an application.

According to various embodiments, the electronic device 101 communicates with the communication service server 240 based on the second operational profile when a service request related to transmission or reception of a profile (or data) that does not include subscriber identification information is requested. 2 communication connections 24 may be performed.

According to various embodiments, the SM-DS server 210 , the SM-DP+ server 220 , the MNO server 230 , or the communication service server 240 is merely a description of an implementation example of the servers for performing each function. , may be referred to as another name, and each of the SM-DS server 210 , the SM-DP+ server 220 , the MNO server 230 , or the communication service server 240 may be composed of one or a plurality of servers. Some or all servers among the SM-DS server 210 , the SM-DP+ server 220 , the MNO server 230 , or the communication service server 240 may be configured as one integrated server. According to various embodiments, the electronic device (eg, the electronic device 101 of FIG. 1A or 1B or the electronic device 101 of FIG. 2 ) includes a display (eg, the display device 160 of FIG. 1A ), a communication module (eg, : Communication module 190 of FIG. 1A ), embedded subscriber identification that stores first information associated with a first communication connection for downloading data including first subscriber identification information for accessing at least one communication service providing server module (eg subscriber identity module 196 in FIG. 1A or eSIM 201 in FIG. 2 ), memory (eg memory 130 in FIG. 1A or memory 211 in FIG. 2 ) and the display, the communication module and a processor (eg, the processor 120 of FIG. 1A ) electrically connected to the memory, wherein the processor transmits data including the first subscriber identification information based on the first information using the communication module Performs the first communication connection for downloading, terminates the first communication connection when a transmission or reception request of data not including the first subscriber identification information is requested during the first communication connection, and based on the second subscriber identification information It may be configured to transmit or receive the data by performing a second communication connection of the .

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

According to various embodiments, the electronic device 101 includes the processor 120 , the communication processor 310 , the RF circuit 320 , the first slot 330 , the second slot 340 , the eSIM 350 , or At least one of the switches 360 may be included. The communication processor 310 may support establishment of a communication channel of a band to be used for wireless communication, and network communication through the established communication channel. For example, the communication processor 310 may support at least one of second generation (2G), 3G, 4G, or 5G network communication. The RF circuit 320 may include, for example, at least one of a radio frequency integrated circuit (RFIC), a radio frequency front end (RFFE), and an antenna module. The RF circuit 320 may process data (eg, a baseband signal) output from the communication processor 310 as an RF signal and transmit it through the antenna module. Alternatively, the RF circuit 320 may convert an RF signal received through the antenna module into a baseband signal and transmit it to the communication processor 310 . The RF circuit 320 may process an RF signal or a baseband signal according to a communication method supported by the communication processor 310 , and the type of the RF circuit 320 is not limited. Interfaces between components are, for example, general purpose input/output (GPIO), universal asynchronous receiver/transmitter (UART) (eg high speed-UART (HS-UART) or peripheral component interconnect bus express (PCIe) interfaces). It may be implemented, but there is no limitation on the type, or at least some of the components may exchange control information or packet data information using, for example, a shared memory. In the embodiment of , although the processor 120 and the communication processor 310 are illustrated as being different hardware, this is merely exemplary, and the processor 120 and the communication processor 310 may be implemented with different hardware, According to another embodiment, the processor 120 and the communication processor 310 may be implemented in a single chip.

The communication processor 310 according to various embodiments may perform an authentication procedure based on information stored in the aforementioned SIM. The communication processor 310 may be connected to the first SIM 331 through the first slot 530 . For example, the first SIM 331 may be connected to a stack (eg, a stack according to ISO7816) of the communication processor 310 . The communication processor 310 may include two stacks in the embodiment of FIG. 3 . For example, the first slot 330 may be a structure that can accommodate the first SIM 331 that is an rSIM, and when the first SIM 331 is accommodated, information from the first SIM 331 is transmitted to the communication processor ( 310) may include at least one terminal capable of being transmitted. The second slot 340 may be a structure that can accommodate the second SIM 341 that is an rSIM, and when the second SIM 341 is accommodated, information from the second SIM 341 is transmitted to the communication processor 310 . It may include at least one possible terminal. The first slot 330 and the second slot 340 may be of the same type, but may be different types according to implementations. The communication processor 310 may obtain information stored in the first SIM 331 from the first SIM 331 accommodated in the first slot 330 . For example, at least one of the first SIM 331 , the second SIM 341 , or the eSIM 350 (eg, the eSIM 201 of FIG. 2 ) includes an integrated circuit card identifier (ICCID), an IMSI, an HPLMN ( At least one of home public land mobile network) related information and a mobile subscriber international ISDN number (MSISDN) may be stored. This may be called an elementary file (EF). The communication processor 310 may perform an authentication procedure for network communication corresponding to the first SIM 331 through the RF circuit 320 based on the acquired information stored in the first SIM 331 . If authentication is successful, the communication processor 310 may perform network communication corresponding to the first SIM 331 through the RF circuit 320 .

At least one of the processor 120 and the communication processor 310 according to various embodiments may control the state of the switch 360 . The state of the switch 360 may be either a first state connecting the communication processor 310 and the second slot 340 or a second state connecting the communication processor 310 and the eSIM 350 . For example, at least one of the processor 120 or the communication processor 310 may control the switch 360 such that the second slot 340 is connected to the communication processor 310 . In other words, at least one of the processor 120 or the communication processor 310 may provide a control signal for controlling the state of the switch 360 to the first state to the switch 360 . If the basic state in which the switch 360 does not receive a specific signal is the first state, at least one of the processor 120 or the communication processor 310 has a second slot 340 in the communication processor 310 . You may not perform any special action to connect. A signal for controlling the switch 360 may be transmitted, for example, through a general purpose input/output (GPIO), but the interface is not limited thereto. In some cases, the state of the switch 360 may be controlled to be a third state that is not connected to either the second slot 340 or the eSIM 350 . The switch 360 may include, for example, at least one metal oxide semiconductor field effect transistor (MOSFET) or a freewheeling switch, but it will be understood by those skilled in the art that the type is not limited. According to various embodiments, the eSIM 350 includes at least one profile (eg, a first profile (profile #1), a second profile (profile #2), ..., an nth profile (profile #n)). can do. Each profile in the eSIM 350 may correspond to a specific carrier.

Although FIG. 3 shows that the communication processor 310 is selectively connected to the second slot 340 or the eSIM 350 according to the state control of the switch 360, this is merely exemplary. According to various embodiments, the communication processor 310 may selectively use a soft SIM installed exclusively for a communication service provider in the electronic device 101 instead of the eSIM 350 . For example, when a soft SIM is installed in the electronic device 101 (eg, inside the processor 120 or inside the communication processor 310 ), the communication processor 310 is connected to the second slot 340 and 2 SIM 341 may be used, or the soft SIM may be selectively used. According to various embodiments, the eSIM in each of the embodiments described below may be replaced with the soft SIM and may be applied identically or similarly.

In the embodiments to be described later, when a call corresponding to any one of the plurality of SIMs (eg, the first SIM 331 , the second SIM 341 , and the eSIM 350 ) is received, an incoming call is made to the other SIM Various embodiments of receiving a corresponding call by switching will be described. For example, referring to FIG. 3 , the electronic device 101 corresponds to the first SIM 331 while the first SIM 331 and the second SIM 341 are operating as a dual SIM dual stand-by (DSDS). When receiving a call, in various situations to be described later (eg, when the media dedicated bearer connection fails during call reception, when the connected media dedicated bearer is disconnected, or when the SIM does not support the codec) Accordingly, the call forwarding process may be performed to a specific profile (eg, any one of the first profile to the nth profile) in the second SIM 341 or the eSIM 350 . For example, when a call received in response to the first SIM 331 is to be forwarded to a specific profile in the eSIM 350 according to the various situations, the communication processor 310 of the electronic device 101 is configured to By controlling 360 , the communication processor 310 may be controlled to be connected to the eSIM 350 instead of the second slot 340 .

4 is a signal flow diagram illustrating a method of registering an IMS network of an electronic device according to various embodiments of the present disclosure; Referring to FIG. 4 , according to an embodiment, the electronic device 101 is a communication network 400 (eg, the first communication network 111a or the second communication network 112a or the third communication network of FIG. 1B ). 113a) through the IMS network 410 (eg, the first IMS network 111b or the second IMS network 112b or the third IMS network 113b of FIG. 1B ). For example, in operation 421 , the electronic device 101 may transmit a first registration request (eg, attach request) including first subscriber information (eg, first identification information) to the communication network 400 . The communication network 400 is based on first identification information corresponding to the first subscriber information included in the first registration request (eg, international mobile subscriber identity (IMSI), which is identification information corresponding to the LTE network of a specific communication service provider). The electronic device 101 may be registered with the communication network 400 . According to an embodiment, the communication network 400 is a communication network (eg, NR communication network or LTE communication network) operated by a first communication operator corresponding to the first subscriber information or a second communication operator corresponding to the second subscriber information. It may be a communication network operated by the company or a communication network operated by a third communication service provider corresponding to the third subscriber information. For example, when the electronic device 101 is a subscriber of the communication operator or a subscriber of another operator that has entered into an agreement with the communication operator, the communication network 400 connects the electronic device 101 to the communication network 400 . ) and can provide communication services. In operation 423 , the first communication network 400 may transmit a first response to the first registration request to the electronic device 101 . The first response may include address information (eg, an IP address) allocated to the electronic device 101 by the communication network 400 . Also, the first response may include address information corresponding to the IMS network 410 .

In operations 425 and 427, the electronic device 101 transmits second identification information corresponding to the first subscriber information included in the second registration request (eg, PUI (public identification information) corresponding to the IMS network of the specific communication service provider. user identity)) based on a second registration request (eg, SIP register) may be transmitted to the IMS network 410 (eg, proxy call state control function (PCSCF)). According to an embodiment, the electronic device 101 may receive protocol configuration options (PCO) from the communication network 400 . The electronic device 101 may acquire address information (eg, an IP address) corresponding to the IMS network 410 based on the PCO. The electronic device 101 may transmit a second registration request to the communication network 400 based on the address information. The communication network 400 may transmit the second registration request received from the electronic device 101 to the IMS network 410 based on the address, for example, through a gateway of the communication network 400 . have. In operations 429 and 431 , the IMS network 610 registers the electronic device 101 with the IMS network 410 based on the second registration request, and a second response to the second registration request (eg, OK) may be transmitted to the electronic device 101 .

By doing so, the electronic device 101 connects to the IMS network via the communication network 400 (eg, the first communication network 111a or the second communication network 112a or the third communication network 113a of FIG. 1B ). 410 (eg, the first IMS network 111b or the second IMS network 112b or the third IMS network 113b of FIG. 1B ) may be used. For example, the electronic device 101 may receive the VoNR service by registering with the IMS network through the NR communication network, or may receive the VoLTE service by registering with the IMS network through the LTE communication network.

According to various embodiments, the electronic device 101 receives the second response (eg, OK message) according to the IMS service registration request to the IMS network 410 , and displays information included in the received second response. Through this, it is possible to check IMS service information supportable for the electronic device 101 . For example, the electronic device 101 checks the registered IMS service (eg, a voice call service or a video call service) and IMS service information (eg, a supportable voice codec or a supportable video codec) that can be supported according to a subscribed communication service provider. can Table 1 below shows examples of IMS service information supportable by a communication operator corresponding to each SIM for a plurality of SIMs included in the electronic device 101 .

Referring to <Table 1>, the first SIM 331 mounted in the first slot 330 is a physical SIM subscribed to carrier A, and the IMS service registered in the first SIM 331 is a voice call and It may be a video call service, and supportable voice codecs may be enhanced voice services (EVS), adaptive multi-rate wideband (AMR-WB), and adaptive multi-rate narrowband (AMR-NB), and the supported video codec is H It can be .265, H.264, or H.263. Also, the second SIM 341 mounted in the second slot 340 is a physical SIM subscribed to carrier B, and the IMS service registered in the second SIM 341 may be a voice call service, and supportable voice The codec may be EVS, AMR-WB, or AMR-NB. In addition, the eSIM 350 installed in the electronic device 101 is a SIM subscribed to carrier C, and the IMS service registered to the eSIM 350 may be a voice call and a video call service, and a supportable voice codec is AMR- It may be WB or AMR-NB, and supportable video codecs may be H.264 or H.263.

According to various embodiments, the electronic device 101 stores IMS service information (eg, a supportable audio codec or a supportable video codec) that can be supported by hardware independently from the IMS service information supported by the communication service provider in a memory. can be saved Table 2 below shows examples of IMS service information supportable by hardware or software included in the electronic device 101 .

According to various embodiments, the electronic device 101 provides IMS service information supportable by the communication service provider confirmed according to the IMS registration exemplified in <Table 1> and IMS supportable by the electronic device exemplified in <Table 2> above. By combining service information, finally, IMS service information supported by each SIM can be set as shown in <Table 3>.

According to various embodiments, when an IMS media call to the electronic device 101 occurs after registering the IMS service, the electronic device 101 may receive a SIP INVITE message from the IMS network 410, Media codec information requested by the calling terminal may be checked through SDP (session description protocol) included in the SIP INVITE message. For example, the media codec information may be arranged in the SDP in order from a codec having a high priority for each media as illustrated in Table 4 below.

// SIM SLOT#1 received IMS media call offered SDP
m=audio 1234 RTP/AVP 112 116 118 111
a=rtpmap:112 EVS /16000
a=fmtp:112 br=5.9-24.4;bw=nb-swb;cmr=1;max-red=220
a=rtpmap:116 AMR- WB /16000/1
a=fmtp:116 mode-change-capability=2;max-red=220
a=rtpmap:118 AMR /8000/1
a=fmtp:118 mode-change-capability=2;max-red=220
a=rtpmap:111 telephone-event/16000
a=fmtp:111 0-15
m=video 1580 RTP/AVP 116 34
a=rtpmap:116 H264 /90000
a=fmtp:116 profile-level-id=42C01E;packetization-mode=1;sprop-parameter-sets=Z0LAHtoHgUZA,aM4BnyA=
a=rtpmap:34 H263 /90000
a=fmtp:34 profile=0;level=10

Referring to the configuration example of the SDP illustrated in Table 4 above, the audio codec is included in the SDP in the order of EVS, AMR-WB, and AMR-NB according to priority, and the video codec is H.264 and H.263 may be included in the SDP in the order of priority.

According to various embodiments, when it is assumed that an audio codec or an image codec finally supported by the electronic device 101 is as exemplified in Table 3, when an IMS media call is received by the first SIM, the first SIM AMR-WB and H.264 can be selected based on IMS service information that can be supported by the . According to the selection of the audio codec and the video codec, the electronic device 101 may transmit the corresponding information to the IMS network 410 by including the information in the SDP in the SIP Session progress message as shown in Table 5 below.

// SDP answering from electronic device
m=audio 1234 RTP/AVP 116 111
a=rtpmap:116 AMR-WB /16000/1
a=fmtp:116 mode-change-capability=2;max-red=220
a=rtpmap:111 telephone-event/16000
a=fmtp:111 0-15
m=video 1580 RTP/AVP 116
a=rtpmap:116 H264 /90000
a=fmtp:116 profile-level-id=42C01E;packetization-mode=1;sprop-parameter-sets=Z0LAHtoHgUZA,aM4BnyA=

In various embodiments to be described later, an IMS media call to the electronic device 101 is generated, and as a result of checking media codec information requested by the calling terminal, a voice codec or an image codec that is finally supported by the currently received SIM is the reception. When the codec with the highest priority requested by the calling terminal of the call is not supported, call forwarding to another SIM supporting the codec with the highest priority among the plurality of SIMs included in the electronic device 101 processing can be done A detailed description of the embodiment will be described later in detail with reference to FIG. 13 .

5 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure; Referring to FIG. 5 , a media call (eg, voice call) is made from an external electronic device (eg, the electronic device 104 of FIG. 1A ) to an electronic device (eg, the electronic device 101 of FIG. 1A ). call) or a video call). According to various embodiments, the electronic device (eg, the electronic device 101 (eg, the processor 120 or the communication module 190 ) of FIG. 1A ) receives the first SIM (eg, FIG. 1A ) from the external electronic device in operation 510 . A call request message for the first SIM 111 of 1b) may be received from an IMS server of an IMS network (eg, the IMS network 610 of Fig. 6) The IMS network is a proxy call session control (P-CSCF) function), a serving call session control function (S-CSCF), an interrogating call session control function (I-CSCF), and a home subscriber server (HSS). According to various embodiments, the IMS server is a P-CSCF According to various embodiments, the call request message may be a SIP INVITE message according to a session initiation protocol (SIP) For example, when the call request message is a call request message for a voice call The SIP INVITE message may be a voice call SDP (session description protocol) offer message, and when the call request message is a call request message for a video call, the SIP INVITE message may be a video call SDP offer message. According to various embodiments, the SDP may include supportable codec information (eg, audio codec information or image codec information) for the media call requested for a call, and a detailed description thereof is shown in FIG. It will be described later in the description.

According to various embodiments, in operation 520, the electronic device may transmit a response message to the received call request message to the IMS server. According to various embodiments, the response message may be a SIP 183 Session Progress message according to SIP. For example, when the call request message is a call request message for a voice call, the SIP 183 Session Progress message may be a voice call SDP response message, and the call request message is a call for a video call. In the case of a request message, the SIP 183 Session Progress message may be a video call SDP response message. According to various embodiments, the SDP response message may include information on at least one codec supportable by the electronic device (or the first SIM included in the electronic device), and a detailed description thereof can be found in the description of FIG. 13 . to be described later.

According to various embodiments, the electronic device may check that a network error has occurred in operation 530 . For example, the electronic device does not receive a media dedicated bearer establishment message (eg, a voice dedicated bearer establishment message or a video dedicated bearer establishment message) for the first SIM within a set time, or the media dedicated for the first SIM When a message corresponding to a bearer connection failure (eg, a voice dedicated bearer lost message or a video dedicated bearer lost message) is received, it may be determined that the network error has occurred.

According to another embodiment, upon receiving a message related to an error of the IMS server (eg, a SIP CANCEL message), the electronic device may determine that the network error has occurred. For example, the electronic device may confirm that an error has occurred in the IMS server by checking the error code included in the Reason header field in the SIP CANCEL message from the IMS server. According to various embodiments, the error of the IMS server may occur due to an overload in the corresponding IMS server.

When a network error as described above occurs, the electronic device terminates the received media call (eg, transmits a 486 Busy Here message) or downgrades to a voice call (eg, transmits a Downgrade to voice call message) according to various embodiments The call forwarding may be requested to another SIM included in the electronic device (eg, a second SIM (eg, the second SIM 112 of FIG. 1B ) or the eSIM 201 of FIG. 1B ).

According to various embodiments, if the occurrence of the network error is confirmed, the electronic device may identify a SIM (eg, a second SIM) configured for call forwarding in operation 540 . The electronic device may determine the SIM for the call forwarding by various methods. For example, the electronic device may determine a SIM for call forwarding based on supportable codec information among a plurality of SIMs included in the electronic device, and various embodiments thereof will be described later.

According to various embodiments, in operation 550 , the electronic device includes information (eg, a phone number corresponding to the second SIM or address information on a network) on the SIM (eg, the second SIM) confirmed for the call forwarding. a call forwarding message to the external electronic device that has transmitted the media call through the IMS server. According to various embodiments, the call forwarding message may be a Moved Temporarily message according to SIP. For example, in the Moved Temporarily message, as illustrated in Table 6 below, information on a SIM to be forwarded (eg, a phone number corresponding to the second SIM or address information on a network or one or more URI (uniform resource identifier) information) may be included.

SIP/2.0 302 Moved Temporarily
Via: SIP/2.0/UDP ims.test.com
From: <sip:Bob@test.com>
To: <sip:Alice@test.com>
Contact: <sip:John@test.com>
Call-ID: 123456@test.com
CSeq: 1 INVITE

According to various embodiments, the IMS server that has received the call forward message from the electronic device may transmit the received call forward message to an external electronic device (eg, a caller terminal) that has transmitted the media call. The external electronic device may receive the call forward message from the electronic device, and may transmit the media call transmitted to the first SIM to a second SIM. According to various embodiments, when a network error occurs with respect to the first SIM, the electronic device performs call forwarding to the second SIM (eg, by automatically performing call forwarding) so that a media call originating from the same external electronic device is not interrupted. can receive

6 is a flowchart illustrating a method of operating an electronic device according to various embodiments of the present disclosure; Referring to FIG. 6 , a media call (eg, voice call) is made from an external electronic device (eg, the electronic device 104 of FIG. 1A ) to an electronic device (eg, the electronic device 101 of FIG. 1A ). call) or a video call). According to various embodiments, the electronic device (eg, the electronic device 101 of FIG. 1A (eg, the processor 120 or the communication module 190 )) receives the first SIM (eg, FIG. 1A ) from the external electronic device in operation 610 . A call request message for the first SIM 111 of 1b) may be received from an IMS server of an IMS network (eg, the IMS network 610 of Fig. 6) The IMS network is a proxy call session control (P-CSCF) function), a serving call session control function (S-CSCF), an interrogating call sessin control function (I-CSCF), and a home subscriber server (HSS) According to various embodiments, the IMS server is a P-CSCF According to various embodiments, the call request message may be a SIP INVITE message according to a session initiation protocol (SIP) For example, when the call request message is a call request message for a voice call The SIP INVITE message may be a voice call SDP (session description protocol) offer message, and when the call request message is a call request message for a video call, the SIP INVITE message may be a video call SDP offer message. According to various embodiments, the SDP may include supportable codec information (eg, audio codec information or image codec information) for the media call requested for a call.

According to various embodiments, the electronic device may check the codec information of the media call from the call request message received through the IMS server in operation 620 . For example, the electronic device may check codec information included in the SDP offer message corresponding to the call request message to identify a codec supported by the external electronic device that has transmitted the media call or a communication service provider of the external electronic device.

According to various embodiments, when the first SIM does not support the codec for the received media call, the electronic device selects the codec for the received media call from among a plurality of SIMs included in the electronic device in operation 630. A supported SIM (eg, a second SIM) may be checked.

For example, when the first SIM does not support the codec for the received media call as described above, the electronic device selects a codec of a relatively low specification supported by the first SIM and performs a call connection procedure instead of performing a call connection procedure. According to an embodiment, a SIM supporting the corresponding codec among a plurality of other SIMs (eg, a second SIM (eg, the second SIM (eg, the second SIM 112 of FIG. 1B ) or the eSIM 201 of FIG. 1B) included in the electronic device) You can request call forwarding to According to various embodiments, the electronic device may determine the SIM for the call forwarding by various methods. For example, the electronic device may determine a SIM for call forwarding based on supportable codec information among a plurality of SIMs included in the electronic device, and various embodiments thereof will be described later.

According to various embodiments, in operation 640 , the electronic device includes information (eg, a phone number corresponding to the second SIM or address information on a network) on the SIM (eg, the second SIM) confirmed for the call forwarding. a call forwarding message to the external electronic device that has transmitted the media call through the IMS server. According to various embodiments, the call forwarding message may be a Moved Temporarily message according to SIP. For example, in the Moved Temporarily message, as exemplified in <Table 6>, information on a SIM to be forwarded to a contact header (eg, a phone number corresponding to the second SIM or address information on a network or one or more URIs) (uniform resource identifier) information) may be included.

According to various embodiments, the IMS server that has received the call forward message from the electronic device may transmit the received call forward message to an external electronic device (eg, a caller terminal) that has transmitted the media call. The external electronic device may receive the call forward message from the electronic device, and may transmit the media call transmitted to the first SIM to a second SIM. According to various embodiments, the electronic device performs call forwarding processing (eg, automatically performing call forwarding) for a received media call to a second SIM that does not support the codec in the first SIM and supports the corresponding codec. It can provide excellent quality media call service.

Hereinafter, various embodiments in which the operation of the electronic device described with reference to FIGS. 5 and 6 is implemented according to the SIP communication protocol will be described with reference to FIGS. 7 to 13 .

7 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure; Referring to FIG. 7 , a voice call may be transmitted from an external electronic device (eg, the electronic device 104 of FIG. 1A ) to an electronic device (eg, the electronic device 101 of FIG. 1A ). According to various embodiments, the electronic device (eg, the electronic device 101 (eg, the processor 120 or the communication module 190 ) of FIG. 1A ) receives the first SIM (eg, FIG. 1A ) from the external electronic device in operation 702 . The call request message for the first SIM 111 of 1b may be received from an IMS server of the IMS network (eg, the IMS network 410 of FIG. 4 ) through the communication network 400. According to various embodiments of the present disclosure , the call request message may be a SIP INVITE message according to a session initiation protocol (SIP) For example, when the call request message is a call request message for a voice call, the SIP INVITE message is a voice call SDP ( session description protocol) offer message According to various embodiments, the SDP may include supportable codec information (eg, voice codec information) for the media call requested for a call, and detailed A description will be given later.

According to various embodiments, in operation 704 , the electronic device may transmit a response message to the received call request message to the IMS server of the IMS network 410 through the communication network 400 . According to various embodiments, the response message may be a SIP Session Progress message according to SIP. For example, when the call request message is a call request message for a voice call, the SIP Session Progress message may be a voice call SDP response message. According to various embodiments, the SDP response message may include information on at least one codec supportable by the electronic device (or the first SIM included in the electronic device), and a detailed description thereof will be provided later.

According to various embodiments, the IMS server of the IMS network 410 may request the establishment of a voice dedicated bearer to the communication network 400 in operation 706 . The communication network 400 (eg, a mobility management entity (MME)) may establish a voice dedicated bearer with the electronic device 100 in operation 708 according to the request of the IMS server. Although not shown in FIG. 7 , the communication network 400 establishes a voice-only bearer to the external electronic device (eg, the electronic device 104 of FIG. 1A ) (eg, the calling terminal) that has transmitted the voice call. (voice dedicated bearer establishment) can be.

When the established voice-only bearer connection is disconnected in operation 710 , the electronic device 101 transmits a Busy Here message to the IMS network 410 in operation 712 to cut off the connection to the IMS network 410 , but according to various embodiments A call forwarding process to another SIM (eg, the second SIM (eg, the second SIM 112 of FIG. 1B ) or the eSIM 201 of FIG. 1B) included in the electronic device may be performed.

According to various embodiments, when the established voice-only bearer connection is disconnected, the electronic device may determine that a network error has occurred, and may check a SIM configured for call forwarding in operation 714 . For example, the electronic device may determine a SIM for call forwarding based on supportable codec information among a plurality of SIMs included in the electronic device, and various embodiments thereof will be described later.

According to various embodiments, in operation 716 , the electronic device includes information (eg, a phone number corresponding to the second SIM or address information on a network) on the SIM (eg, the second SIM) identified for the call forwarding. The call forwarding message may be transmitted to the IMS server of the IMS network 410 through the communication network 400 . According to various embodiments, the call forwarding message may be a Moved Temporarily message according to SIP. For example, in the Moved Temporarily message, as exemplified in FIG. 5 , information on a SIM to be forwarded (eg, a phone number corresponding to the second SIM or address information on a network or one or more URIs (uniforms) resource identifier) information) may be included. The IMS server of the IMS network 410 that has received the Moved Temporarily message from the electronic device 101 may transmit the received Moved Temporarily message to the corresponding external electronic device that has transmitted the voice call. The external electronic device may receive the call forwarding message from the electronic device, and may convert the voice call transmitted to the first SIM to the second SIM and transmit the message. According to various embodiments, when the voice-only bearer configured for the first SIM is disconnected as in operation 710, the electronic device performs call forwarding processing to the second SIM to receive a voice call originating from the same external electronic device without interruption can do.

8 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure. In FIG. 8 to be described later, descriptions of parts common to that of FIG. 7 will be omitted. Referring to FIG. 8 , a voice call may be transmitted from an external electronic device (eg, the electronic device 104 of FIG. 1A ) to an electronic device (eg, the electronic device 101 of FIG. 1A ). According to various embodiments, the electronic device (eg, the electronic device 101 (eg, the processor 120 or the communication module 190 ) of FIG. 1A ) receives the first SIM (eg, FIG. 1A ) from the external electronic device in operation 802 . The call request message for the first SIM 111 of 1b may be received from an IMS server of the IMS network (eg, the IMS network 410 of FIG. 4 ) through the communication network 400. According to various embodiments of the present disclosure , the call request message may be a SIP INVITE message according to a session initiation protocol (SIP).

According to various embodiments, in operation 804 , the electronic device may transmit a response message to the received call request message to the IMS server of the IMS network 410 through the communication network 400 . According to various embodiments, the response message may be a SIP Session Progress message according to SIP.

According to various embodiments, the IMS server of the IMS network 410 may request the establishment of a voice dedicated bearer to the communication network 400 in operation 806 . In operation 808 , the communication network 400 (eg, mobility management entity (MME)) may fail to establish a voice-only bearer according to various network conditions despite the voice-only bearer establishment request. For example, the setup of the voice-only bearer may fail according to S1 release of the LTE network or the resource status or radio channel status of the network.

According to various embodiments, the electronic device 101 may not receive a voice-only bearer establishment message within a set time in operation 810 according to the failure to establish the voice-only bearer.

If the voice-only bearer setup message is not received within the set time in operation 810, the electronic device 101 transmits a Busy Here message to the IMS network 410 in operation 812 to cut off the connection to the IMS network 410, According to an embodiment, a call forwarding process to another SIM (eg, a second SIM (eg, the second SIM 112 of FIG. 1B ) or the eSIM 201 of FIG. 1B ) included in the electronic device may be performed. Hereinafter, since the call forwarding processing of operations 814 and 816 is similar to operations 714 and 716 of FIG. 7 , a detailed description thereof will be omitted. According to various embodiments, when the electronic device does not receive the voice-only bearer establishment message within the set time as in operation 810 for the first SIM, the electronic device performs call forwarding processing to the second SIM and a voice call originating from the same external electronic device can be received without interruption.

In the embodiment of FIG. 8 , a case in which voice-only bearer setup fails for a voice call transmitted to the electronic device 101 is exemplified. However, according to various embodiments, a video call transmitted to the electronic device 101 is illustrated. The same or similar application may be applied to a case in which voice-only bearer setup for (video call) fails.

9 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure; Referring to FIG. 9 , a video call may be transmitted from an external electronic device (eg, the electronic device 104 of FIG. 1A ) to an electronic device (eg, the electronic device 101 of FIG. 1A ). According to various embodiments, the electronic device (eg, the electronic device 101 (eg, the processor 120 or the communication module 190 ) of FIG. 1A ) receives the first SIM (eg, FIG. 1A ) from the external electronic device in operation 902 . The call request message for the first SIM 111 of 1b may be received from an IMS server of the IMS network (eg, the IMS network 410 of FIG. 4 ) through the communication network 400. According to various embodiments of the present disclosure , the call request message may be a SIP INVITE message according to SIP (session initiation protocol) For example, when the call request message is a call request message for a video call, the SIP INVITE message is a video call SDP ( session description protocol) offer message According to various embodiments, the SDP may include supportable codec information (eg, video codec information and audio codec information) for the media call requested for a call, , a detailed description thereof will be provided later.

According to various embodiments, in operation 904 , the electronic device may transmit a response message to the received call request message to the IMS server of the IMS network 410 through the communication network 400 . According to various embodiments, the response message may be a SIP Session Progress message according to SIP. For example, when the call request message is a call request message for a video call, the SIP Session Progress message may be a video call SDP response message. According to various embodiments, the SDP response message may include information on at least one codec supportable by the electronic device (or the first SIM included in the electronic device), and a detailed description thereof will be provided later.

According to various embodiments, the IMS server of the IMS network 410 may request the establishment of a video and voice dedicated bearer to the communication network 400 in operation 906 (request video and voice dedicated bearer). The communication network 400 (eg, a mobility management entity (MME) device) may establish a video and voice dedicated bearer establishment with the electronic device 100 in operation 908 according to the request of the IMS server. have. Although not shown in FIG. 9 , the communication network 400 transmits the video call to an external electronic device (eg, the electronic device 104 of FIG. 1A ) (eg, a calling-side terminal) that transmits a video and audio-only bearer. You can set up (video and voice dedicated bearer establishment).

If the video-only bearer connection among the configured video and audio-only bearers fails in operation 910 , the electronic device 101 may receive a SIP Update message from the IMS network 410 in operation 912 . In operation 914, a SIP 200 OK message may be transmitted. The SIP Update message may be a message transmitted from the originating terminal. For example, in the case of a video call, the SIP Update message includes information on whether the video-only bearer is configured by the external electronic device or information related to the configured video-only bearer (eg, “m=video 1580 RTP/AVP 116”). can do. The electronic device 101 may check the received SIP Update message and transmit a SIP 200 OK message in operation 914 . The SIP 200 OK message may include information for downgrading to a voice call or information related to call connection interruption according to the video-only bearer connection failure. For example, the SIP 200 OK message may include information indicating that a video call is impossible (eg, “m=video 0 RTP/AVP 116”).

According to various embodiments, when the video-only bearer connection among the configured video and audio-only bearers is disconnected, the electronic device transmits a SIP 200 OK message in operation 914 to downgrade to a voice call or stop the call connection procedure, instead of A video call is possible among other SIMs (eg, a second SIM (eg, the second SIM (eg, the second SIM 112 of FIG. 1B ) or the eSIM 201 of FIG. 1B ) included in the electronic device without transmitting the SIP 200 OK message You can request call forwarding to the SIM.

According to various embodiments, when the established video-only bearer connection is disconnected, the electronic device may determine that a network error has occurred, and may check a SIM configured for call forwarding in operation 916 . For example, the electronic device may determine a SIM for call forwarding among SIMs supporting a video call based on supportable codec information among a plurality of SIMs included in the electronic device, and various embodiments thereof will be described later. do.

According to various embodiments of the present disclosure, in operation 98 , the electronic device includes information (eg, a phone number corresponding to the second SIM or address information on a network) about the SIM (eg, the second SIM) identified for call forwarding. The call forwarding message may be transmitted to the IMS server of the IMS network 410 through the communication network 400 . According to various embodiments, the call forwarding message may be a Moved Temporarily message according to SIP. For example, in the Moved Temporarily message, as exemplified in FIG. 5 , information on a SIM to be forwarded (eg, a phone number corresponding to the second SIM or address information on a network or one or more URIs (uniforms) resource identifier) information) may be included. The IMS server of the IMS network 410 that has received the Moved Temporarily message from the electronic device 101 may transmit the received Moved Temporarily message to the corresponding external electronic device that has transmitted the video call. The external electronic device may receive the call forwarding message from the electronic device, and may transmit the video call sent to the first SIM to the second SIM. According to various embodiments, when the video-only bearer set for the first SIM is disconnected as in operation 910, the electronic device downgrades a video call originating from the same external electronic device by performing call forwarding to the second SIM, or You can receive without interruption.

10 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure; A description of parts common to that of FIG. 9 in FIG. 10, which will be described later, will be omitted. Referring to FIG. 10 , a video call may be transmitted from an external electronic device (eg, the electronic device 104 of FIG. 1A ) to an electronic device (eg, the electronic device 101 of FIG. 1A ). According to various embodiments, the electronic device (eg, the electronic device 101 (eg, the processor 120 or the communication module 190 ) of FIG. 1A ) receives the first SIM (eg, FIG. 1A ) from the external electronic device in operation 1002 . The call request message for the first SIM 111 of 1b may be received from an IMS server of the IMS network (eg, the IMS network 410 of FIG. 4 ) through the communication network 400. According to various embodiments of the present disclosure , the call request message may be a SIP INVITE message according to a session initiation protocol (SIP).

According to various embodiments, in operation 1004 , the electronic device may transmit a response message to the received call request message to the IMS server of the IMS network 410 through the communication network 400 . According to various embodiments, the response message may be a SIP Session Progress message according to SIP.

According to various embodiments, the IMS server of the IMS network 410 may request the establishment of a video and voice dedicated bearer to the communication network 400 in operation 1006 (request video and voice dedicated bearer).

The communication network 400 (eg, a mobility management entity (MME) device) may establish a voice dedicated bearer with the electronic device 100 in operation 1008 according to the request of the IMS server. According to various embodiments, the communication network 400 (eg, Mobility Management Entity (MME)) normally sets the voice-only bearer, but may fail to set the video-only bearer in operation 1010 according to various network conditions. For example, the setup of the video-only bearer may fail according to S1 release of the LTE network or the resource status or radio channel status of the network. If the setup of the video dedicated bearer fails, the electronic device 101 may not receive the video dedicated bearer setup message within the set time in operation 1012 . The electronic device 101 may receive a SIP Update message from the IMS network 410 in operation 912 .

According to various embodiments, when the video-only bearer establishment message is not received within the time set in operation 1012, in operation 1016, the SIP 200 OK message is transmitted to downgrade to a voice call or stop the call connection procedure, but the SIP 200 A video call-capable SIM among other SIMs (eg, a second SIM (eg, the second SIM (eg, the second SIM 112 in FIG. 1B ) or the eSIM 201 in FIG. 1B ) included in the electronic device without transmitting an OK message of call forwarding processing can be performed.

Hereinafter, since the call forwarding processing of operations 1018 and 1020 is similar to operations 916 and 918 of FIG. 9 , a detailed description thereof will be omitted. According to various embodiments, when the video-only bearer set for the first SIM is disconnected as in operation 1010, the electronic device performs call forwarding processing to the second SIM to downgrade a video call originating from the same external electronic device to a voice call. It can be received without being graded or interrupted.

11 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure; Referring to FIG. 11 , a voice call may be transmitted from an external electronic device (eg, the electronic device 104 of FIG. 1A ) to an electronic device (eg, the electronic device 101 of FIG. 1A ). According to various embodiments, the electronic device (eg, the electronic device 101 (eg, the processor 120 or the communication module 190 ) of FIG. 1A ) receives the first SIM (eg, FIG. 1A ) from the external electronic device in operation 1102 . The call request message for the first SIM 111 of 1b may be received from an IMS server of the IMS network (eg, the IMS network 410 of FIG. 4 ) through the communication network 400. According to various embodiments of the present disclosure , the call request message may be a SIP INVITE message according to a session initiation protocol (SIP) For example, when the call request message is a call request message for a voice call, the SIP INVITE message is a voice call SDP ( session description protocol) offer message According to various embodiments, the SDP may include supportable codec information (eg, voice codec information) for the media call requested for a call, and detailed A description will be given later.

According to various embodiments, in operation 1104 , the electronic device may transmit a response message to the received call request message to the IMS server of the IMS network 610 through the communication network 600 . According to various embodiments, the response message may be a SIP Session Progress message according to SIP. For example, when the call request message is a call request message for a voice call, the SIP Session Progress message may be a voice call SDP response message. According to various embodiments, the SDP response message may include information on at least one codec supportable by the electronic device (or the first SIM included in the electronic device), and a detailed description thereof will be provided later.

According to various embodiments, the IMS server of the IMS network 410 may transmit a PRACK message to the electronic device 101 in operation 1106 . The electronic device 101 may receive the PRACK message from the IMS server of the IMS network 610 and transmit a 200 OK message to the IMS server in operation 1108 .

According to various embodiments, an error may occur in the IMS server of the IMS network 410 according to various causes. For example, when there is an excessive load on the IMS server, the IMS server may notify the electronic device 101 of the occurrence of an error. For example, the IMS server of the IMS network 410 may transmit a SIP CANCEL message to the electronic device 101 in operation 1110 . The SIP CANCEL message may include a reason field, and the IMS server may transmit an error code corresponding to the reason field to the electronic device 101 .

According to various embodiments, the electronic device 101 may confirm that an error has occurred in the IMS server by receiving the SIP CANCEL message from the IMS server and checking the reason field. As described above, when an error of the IMS server is confirmed, the electronic device 101 transmits the SIP CANCEL message in operation 1112 and transmits a request terminated message in operation 1114 to disconnect the connection, according to various embodiments of the present disclosure. Accordingly, a call forwarding may be requested to another SIM included in the electronic device (eg, a second SIM (eg, the second SIM 112 of FIG. 1B ) or the eSIM 201 of FIG. 1B ).

According to various embodiments, when it is determined that an error has occurred in the IMS server, the electronic device may identify a SIM configured for call forwarding in operation 1116 . For example, the electronic device may determine a SIM for call forwarding based on supportable codec information among a plurality of SIMs included in the electronic device, and various embodiments thereof will be described later.

According to various embodiments, in operation 1118 , the electronic device includes information (eg, a phone number corresponding to the second SIM or address information on a network) on the SIM (eg, the second SIM) identified for the call forwarding. The call forwarding message may be transmitted to the IMS server of the IMS network 410 through the communication network 400 . According to various embodiments, the call forwarding message may be a Moved Temporarily message according to SIP. For example, in the Moved Temporarily message, as exemplified in FIG. 5 , information on a SIM to be forwarded (eg, a phone number corresponding to the second SIM or address information on a network or one or more URIs (uniforms) resource identifier) information) may be included. The IMS server of the IMS network 410 that has received the Moved Temporarily message from the electronic device 101 may transmit the received Moved Temporarily message to the corresponding external electronic device that has transmitted the voice call. The external electronic device may receive the call forwarding message from the electronic device, and may convert the voice call transmitted to the first SIM to the second SIM and transmit the message.

According to various embodiments, when the electronic device determines that a network error has occurred through the CANCEL message received in operation 1110 for the first SIM, the electronic device performs call forwarding processing to the second SIM to receive a voice call originating from the same external electronic device. You can receive without interruption.

12 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure; Hereinafter, when explaining FIG. 12, it will be described with reference to FIGS. 14 and 15 together. 14 and 15 illustrate call forward related screens displayed on a calling party electronic device according to various embodiments of the present disclosure.

According to various embodiments, the electronic device 101 may include a first SIM 111 and a second SIM 112 . Although the electronic device 101 is illustrated as including two SIMs in FIG. 12 for convenience of explanation, according to various embodiments, as illustrated in FIG. 1B or FIG. 3 , three or more SIMs (eg, a first SIM ( 331 ), a second SIM 341 , and an eSIM 350 ). Referring to FIG. 12 , in the external electronic device 1200 (eg, the electronic device 104 of FIG. 1A ), the media is displayed as a phone number corresponding to the first SIM of the electronic device (eg, the electronic device 101 of FIG. 1A ). A call (media) (eg, a video call or a voice call) may be placed. According to various embodiments, the external electronic device 1200 transmits a SIP INVITE message (eg, Invite with precondition message) supporting preconditioning through the communication network 400 according to the media call origination in operation 1202 . may be transmitted to the IMS network 410 . The IMS network 410 may receive the SIP INVITE message from the external electronic device 1200 in operation 1204 and transmit the received SIP INVITE message to the electronic device 101 .

According to various embodiments, the electronic device (eg, the electronic device 101 (eg, the processor 120 or the communication module 190 ) of FIG. 1A ) performs an IMS network (eg, the IMS network 410 of FIG. 4 ) in operation 1204 , according to various embodiments. ) can receive the SIP INVITE message from the IMS server. For example, when the call request message is a call request message for a video call, the SIP INVITE message is a video call SDP (session description protocol) offer message. may be, and when the call request message is a call request message for a voice call, the SIP INVITE message may be a voice call SDP (session description protocol) offer message According to various embodiments, the SDP is Supportable codec information (eg, video codec information and audio codec information) for the media call requested for a call may be included.

According to various embodiments, in operation 1206 , the electronic device may transmit a response message to the received call request message to the IMS server of the IMS network 410 . According to various embodiments, the response message may be a SIP Session Progress message supporting precondition (Session Progress with precondition message). The IMS network 410 may transmit the received response message (Session Progress with precondition message) to the external electronic device 1200 in operation 1208 .

According to various embodiments, the IMS server of the IMS network 410 may request the communication network 400 to establish a media-only bearer, and accordingly, the communication network 400) (eg, a mobility management entity (MME) device). ) may establish a media dedicated bearer with the electronic device 100 according to the request of the IMS server in operation 1210 . Although not shown in FIG. 12 , the communication network 400 establishes a media-only bearer to the external electronic device (eg, the electronic device 104 of FIG. 1A ) (eg, the calling terminal) that originated the video call. (media dedicated bearer establishment).

If the established media-only bearer (eg, video-only bearer or voice-only bearer) is disconnected in operation 1212, the electronic device 101 determines that a network error has occurred, and in operation 1214, confirms the SIM configured for call forwarding. have. For example, the electronic device may determine, as the second SIM 112 , a SIM for call forwarding among SIMs supporting a video call based on supportable codec information among a plurality of SIMs included in the electronic device.

Hereinafter, an example in which the electronic device 101 identifies an optimal SIM for call forwarding in operation 1214 will be described in detail. The electronic device 101 may include four SIMs as shown in Table 7 below, and information on a registered IMS service and supportable codecs of each SIM may be stored in a memory.

For example, in Table 7, the first SIM 330 and the second SIM 360 may be physical SIMs, and the third SIM and the fourth SIM may correspond to respective profiles included in the eSIM 350 . As illustrated in FIG. 3 , the second SIM 360 may be selectively connected to the communication processor 310 by the eSIM 350 and the switch 360 . For example, when the communication processor 310 is connected to the second SIM 341 mounted in the second slot 340 through the switch 360 , the first SIM 331 and the second SIM 341 are DSDS Alternatively, it may operate as a DSDA. On the other hand, when the communication processor 310 is connected to the eSIM 350 through the switch 360 , a specific profile selected from the first SIM 331 and the eSIM 350 (eg, the first profile or the second profile) any one profile) may operate as DSDS or DSDA. According to various embodiments, it may be assumed that the first profile corresponds to the third SIM of <Table 7>, and the second profile corresponds to the fourth SIM of <Table 7>.

According to various embodiments, the phone number of the first SIM is 'A', the operator is 'A', the registered IMS service is a voice and video service, and the supported voice codecs are AMR-WB and AMR-NB. , it can be assumed that the supported video codecs are H.264 and H.263. In addition, it may be assumed that the phone number of the second SIM is 'B', the operator is 'B', the registered IMS service is a voice service, and the supported voice codecs are EVS, AMR-WB, and AMR-NB. . In addition, the phone number of the third SIM is 'C', the operator is 'Byong', the registered IMS service is a voice and video service, the supported voice codecs are AMR-WB and AMR-NB, and the supported video It can be assumed that the codec is H.264 or H.263. In addition, the phone number of the fourth SIM is 'D', the operator is 'Jeong', the registered IMS service is a voice and video service, and the supported voice codecs are EVS, AMR-WB, AMR-NB, and support It can be assumed that possible video codecs are H.264 and H.263.

According to various embodiments, the external electronic device 1200 may transmit a video call to a phone number (eg, 'A') corresponding to the first SIM of the electronic device 101 . The electronic device 101 may receive a video call from the external electronic device 1200 to a phone number corresponding to the first SIM. As a result of checking information on codecs supportable by the external electronic device 1200 through SDP in the SIP INVITE message transmitted from the external electronic device 1200, the voice codecs supportable by the external electronic device 1200 are EVS and AMR-WB. , AMR-NB, and supportable video codecs may be assumed to be H.264 and H.263.

According to various embodiments, while the electronic device 101 receives a video call from the external electronic device 1200 , the media-only bearer connection may be disconnected in operation 1212 . The electronic device 101 may determine a SIM for call forwarding among other installed SIMs (eg, a second SIM, a third SIM, and a fourth SIM other than the first SIM in Table 7). According to various embodiments, the electronic device 101 may determine a second SIM corresponding to a communication operator different from the first SIM as a SIM for call forwarding. According to another embodiment, since the received call is a video call and the second SIM does not support a video service, the electronic device 101 performs call forwarding to a third SIM or a fourth SIM supporting a video service. It can be decided with a SIM for According to various embodiments, the electronic device 101 determines a SIM for call forwarding from among the third SIM or the fourth SIM supporting EVS, which is a voice codec supportable by the external electronic device 1200 . can

According to various embodiments, as shown in FIG. 12 , in a situation in which a call connection through the first SIM fails as the established media-only bearer connection is disconnected, call forwarding processing is performed to another SIM (eg, the fourth SIM) to be normally You can connect video calls.

According to various embodiments, when the SIM determined for call forwarding is an inactivated SIM that is not currently connected to a communication network (eg, it is not an activated SIM according to DSDA, or activated SIM in a stand-by state according to DSDS) otherwise), a SIM switching operation for converting the SIM determined for call forwarding to an activated SIM may be further performed. For example, as described above in the description of FIG. 3 , a SIM switching operation may be performed so that the second SIM 341 or the eSIM 350 is connected to the communication processor 310 by controlling the switch 360 .

According to various embodiments, in operation 1216 , the electronic device includes information (eg, a phone number corresponding to the second SIM or address information on a network) about the SIM (eg, the second SIM) identified for call forwarding. may transmit a call forwarding message to the IMS server of the IMS network 410 . According to various embodiments, the call forwarding message may be a Moved Temporarily message according to SIP. For example, in the Moved Temporarily message, as illustrated in FIG. 5 , information on a SIM to be forwarded (eg, a phone number corresponding to the second SIM or address information on a network or one or more URIs (uniforms) resource identifier) information) may be included. The IMS server of the IMS network 410 that has received the Moved Temporarily message from the electronic device 101 may transmit the received Moved Temporarily message to the corresponding external electronic device 1200 that has transmitted the video call in operation 1218 .

According to various embodiments, the external electronic device 1200 receives a call forwarding message from the electronic device, transmits an Ack message to the IMS network 410 in operation 1220, and transmits an Ack message to the first SIM in operation 1224. The video call can be transferred by switching to the second SIM. For example, the external electronic device 1200 may transmit a media call request (Invite with precondition) corresponding to the call forwarded second SIM to the electronic device 101 in operation 1224 . Upon receiving the Ack message from the external electronic device 1200 , the IMS network 410 may transmit the Ack message to the electronic device 101 in operation 1222 .

According to various embodiments, the external electronic device 1200 receives a call forwarding message from the electronic device, and as shown in FIG. 14 , a message indicating that the call forwarding is automatically performed on the call connection screen (eg, Bob ) may be displayed in the form of a pop-up window 1410 or a toast message.

According to another embodiment, the external electronic device 1200 may receive a call forward message from the electronic device and display a pop-up window 1510 asking whether to forward a call as shown in FIG. 15 . For example, as shown in FIG. 15 , a message “The call connection state with Bob is not good” may be displayed to inform the user that an outgoing call sent to the phone number of “Bob” cannot be connected normally. When a connection 1511 to another number displayed along with the message is selected by the user in the pop-up window 1510 shown in FIG. 15 , as described above, operation 1218 is performed to correspond to the call forwarded second SIM. A media call request (Invite with precondition) may be transmitted to the electronic device 101 . If an end 1512 displayed together with the message is selected by the user in the pop-up window 1510 shown in FIG. 15 , despite receiving a call forwarding request from the electronic device 101 in operation 1318 , the call The call connection attempt may be terminated without performing the conversion. According to various embodiments, the number to which the call is forwarded may mean another phone number of the same user as the user of the phone number called by the external electronic device 1200, and according to various embodiments, the external electronic device 1200 ), call forwarding can be performed without storing information on the number to which the call is forwarded.

13 is a signal flow diagram illustrating a call forwarding method of an electronic device according to various embodiments of the present disclosure; In FIG. 13 to be described later, descriptions of parts common to that of FIG. 12 will be omitted. Referring to FIG. 13 , according to various embodiments, the electronic device 101 may include a first SIM 111 and a second SIM 112 . Although the electronic device 101 is illustrated as including two SIMs in FIG. 13 for convenience of explanation, according to various embodiments, as illustrated in FIG. 1B or FIG. 3 , three or more SIMs (eg, a first SIM ( 331 ), a second SIM 341 , and an eSIM 350 ). Referring to FIG. 12 , in the external electronic device 1200 (eg, the electronic device 104 of FIG. 1A ), media is displayed as a phone number corresponding to the first SIM of the electronic device (eg, the electronic device 101 of FIG. 1A ). A call (media) (eg, a video call or a voice call) may be placed. According to various embodiments, the external electronic device 1200 transmits a SIP INVITE message (eg, Invite with precondition message) supporting preconditioning through the communication network 400 according to the media call origination in operation 1302 . may be transmitted to the IMS network 410 . The IMS network 410 may receive the SIP INVITE message from the external electronic device 1200 in operation 1304 and transmit the received SIP INVITE message to the electronic device 101 .

According to various embodiments, the electronic device (eg, the electronic device 101 (eg, the processor 120 or the communication module 190 ) of FIG. 1A ) configures the IMS network (eg, the IMS network 410 of FIG. 4 ) in operation 1304 , according to various embodiments. ) can receive the SIP INVITE message from the IMS server. For example, if the call request message is a call request message for a video call, the SIP INVITE message is a video call SDP (session description protocol) offer message. may be, and when the call request message is a call request message for a voice call, the SIP INVITE message may be a voice call SDP (session description protocol) offer message According to various embodiments, the SDP is Supportable codec information (eg, video codec information and audio codec information) for the media call requested for a call may be included.

According to various embodiments, in operation 1306 , the electronic device may transmit a response message to the received call request message to the IMS server of the IMS network 410 . According to various embodiments, the response message may be a SIP Session Progress message supporting precondition (Session Progress with precondition message). The IMS network 410 may transmit the received response message (Session Progress with precondition message) to the external electronic device 1200 in operation 1308 .

According to various embodiments, the IMS server of the IMS network 410 may request the communication network 400 to establish a media-only bearer, and accordingly, the communication network 400) (eg, a mobility management entity (MME) device). ) may establish a media dedicated bearer with the electronic device 100 according to the request of the IMS server in operation 1310 .

According to various embodiments, information on a codec supportable by the external electronic device 1200 (or a communication service provider of the external electronic device 1200) requesting a call by checking the SDP included in the SIP INVITE message received in operation 1304 (eg, video codec information or audio codec information). According to various embodiments, the electronic device 101 may check whether the first SIM 111 can support an optimal codec among codecs supportable by the checked external electronic device 1200 . For example, the electronic device may determine whether the first SIM 111 can support a codec having the highest priority among codecs supportable by the external electronic device 1200 .

According to various embodiments, if it is determined that the optimal codec is not supported by the first SIM as a result of the check in operation 1312 , the electronic device 101 may identify an optimal SIM for call forwarding in operation 1314 . For example, a codec having the highest priority among codecs supportable by the external electronic device 1200 among other SIMs installed in the electronic device 101 (eg, the second SIM 112 and the eSIM 350 ) is selected. A supported SIM can be determined as an optimal SIM for call forwarding.

Hereinafter, an example in which the electronic device 101 identifies an optimal SIM for call forwarding in operation 1314 will be described in detail. The electronic device 101 may include four SIMs as shown in Table 7 described above in the description of FIG. 12 , and the registered IMS service and supportable codec information of each SIM may be stored in a memory.

According to various embodiments, the external electronic device 1200 may transmit a video call to a phone number (eg, 'A') corresponding to the first SIM of the electronic device 101 . The electronic device 101 may receive a video call from the external electronic device 1200 to a phone number corresponding to the first SIM. As a result of checking information on codecs supportable by the external electronic device 1200 through SDP in the SIP INVITE message transmitted from the external electronic device 1200, the voice codecs supportable by the external electronic device 1200 are EVS and AMR-WB. , AMR-NB, and supportable video codecs may be assumed to be H.264 and H.263.

According to various embodiments, in operation 1312 , the electronic device 101 may determine that the first SIM 111 does not support EVS among the voice codecs supportable by the external electronic device 1200 . The electronic device 101 has a priority supportable by the external electronic device 1200 among other installed SIMs (eg, the second SIM, the third SIM, and the fourth SIM except the first SIM in Table 7). The SIM supporting the highest codec can be determined as the best SIM for call forwarding.

For example, referring to <Table 7>, as a result of the check, since the second SIM does not support the video service and the third SIM does not support EVS among the voice codecs, the fourth SIM is the optimal SIM for call forwarding. can be decided with

According to various embodiments, as shown in FIG. 13 , a video call received through the first SIM requests the EVS codec, but the maximum supportable voice codec in the first SIM is AMR_WB, which does not support the EVS codec. Call forwarding processing to another SIM (eg, a 4th SIM) capable of supporting EVS calls even though it is impossible to connect a call can be performed to connect a call supporting higher quality.

Hereinafter, since operations 1316 to 1324 are the same as or similar to operations 1216 to 1224 of FIG. 12 described above, a detailed description thereof will be omitted.

The electronic device according to any one of various embodiments communicates with at least one antenna module and a plurality of subscriber identity modules (SIMs) included in the electronic device, and includes a communication network through the at least one antenna module, and at least one processor communicating with an IP multimedia subsystem (IMS) network, wherein the at least one processor transmits a call request to a first subscriber identity module (SIM) among the plurality of SIMs to the IMS network receives from the IMS server of the , transmits a response message to the call request to the IMS server, checks the occurrence of a network error related to the call to the first SIM, and, in response to the confirmation of the occurrence of the network error, the plurality of It is possible to check a second SIM preset for call forwarding among SIMs, and control to request the call forwarding to the second SIM for the call to the IMS server.

According to various embodiments, the processor may determine that the network error has occurred when receiving a message corresponding to a connection failure of a bearer configured for the first SIM.

According to various embodiments, when receiving a message related to an error of the IMS server, the processor may determine that the network error has occurred.

According to various embodiments of the present disclosure, the processor may determine that the network error has occurred when the establishment of a bayer connection to the first SIM fails within a set time.

According to various embodiments, the processor may control to transmit a call forward message including information on the second SIM to the external electronic device that has originated the call through the IMS server.

According to various embodiments, the processor may receive a session initiation message corresponding to the call to the first SIM from the IMS server.

According to various embodiments, the processor checks a codec corresponding to the call included in the session initiation message, checks whether the checked codec is a codec supported by the first SIM, and If the codec is not supported by the first SIM, identify a third SIM that supports the identified codec among the plurality of SIMs, and request the IMS server to forward the call to the third SIM for the call. can be controlled

The electronic device according to any one of various embodiments communicates with at least one antenna module and a plurality of subscriber identity modules (SIMs) included in the electronic device, and includes a communication network through the at least one antenna module, and at least one processor communicating with an IP multimedia subsystem (IMS) network, wherein the at least one processor transmits a call request to a first subscriber identity module (SIM) among the plurality of SIMs to the IMS network Receive from the IMS server of , check at least one codec corresponding to the call, check whether the checked at least one codec is a codec supported by the first SIM, and check the at least one identified codec is not supported by the first SIM, a second SIM supporting the identified at least one codec among the plurality of SIMs is identified, and the call forwarding to the second SIM for the call is transferred to the IMS server. You can control the request.

According to various embodiments, the processor may control to transmit a call forward message including information on the second SIM to the external electronic device that has originated the call through the IMS server.

According to various embodiments, the processor may receive a session initiation message corresponding to the call to the first SIM from the IMS server.

According to various embodiments, the processor may identify a codec corresponding to the call from the session initiation message.

According to various embodiments, the processor may identify the second SIM by further considering whether the electronic device supports the at least one identified codec.

The method of operating an electronic device according to any one of various embodiments may include sending a call request to a first subscriber identity module (SIM) among a plurality of subscriber identity modules (SIMs) included in the electronic device to the IMS network. receiving the call request from the IMS server, transmitting a response message to the call request to the IMS server, and confirming occurrence of a network error related to the call to the first SIM; checking a second SIM preset for call forwarding among the plurality of SIMs in response to the confirmation of the occurrence of the network error; and requesting the IMS server to transfer the call to the second SIM for the call.

According to various embodiments, the method may determine that the network error has occurred when a message corresponding to a connection failure of a bearer configured for the first SIM is received.

According to various embodiments, the method may determine that the network error has occurred when a message related to the error of the IMS server is received.

According to various embodiments of the present disclosure, the method may determine that the network error has occurred when the establishment of a bayer connection to the first SIM fails within a set time.

According to various embodiments of the present disclosure, the method may include transmitting a call forward message including information on the second SIM to the external electronic device that originated the call through the IMS server.

According to various embodiments, the method may include receiving a session initiation message corresponding to the call to the first SIM from the IMS server.

According to various embodiments, the method includes an operation of checking a codec corresponding to the call included in the session initiation message, an operation of checking whether the identified codec is a codec supported by the first SIM, and the If the identified codec is not supported by the first SIM, the operation of identifying a third SIM supporting the identified codec among the plurality of SIMs and forwarding the call to the third SIM for the call is performed by the IMS server You can control the request with .

The method of operating an electronic device according to any one of various embodiments may include sending a call request to a first subscriber identity module (SIM) among a plurality of subscriber identity modules (SIMs) included in the electronic device to the IMS network. an operation of receiving from the IMS server of if one codec is not supported by the first SIM, identifying a second SIM supporting the identified at least one codec among the plurality of SIMs; and forwarding the call to the second SIM may include an operation of requesting to the IMS server.

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

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

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

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

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

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

Claims (20)

In an electronic device,
at least one antenna module; and
At least one processor that communicates with a plurality of subscriber identity modules (SIMs) included in the electronic device and communicates with a communication network and an IP multimedia subsystem (IMS) network through the at least one antenna module,
The at least one processor,
receiving a call request for a first subscriber identity module (SIM) from among the plurality of SIMs from an IMS server of the IMS network;
Transmitting a response message to the call request to the IMS server,
Checking the occurrence of a network error related to the call to the first SIM,
In response to the confirmation of the occurrence of the network error, check a second SIM preset for call forwarding among the plurality of SIMs;
and controlling the IMS server to request forwarding of the call to the second SIM for the call.
The method of claim 1, wherein the processor comprises:
and determining that the network error has occurred when a message corresponding to a connection failure of a bearer configured for the first SIM is received.
The method of claim 1, wherein the processor comprises:
When receiving a message related to the error of the IMS server, it is determined that the network error has occurred.
The method of claim 1, wherein the processor comprises:
The electronic device determines that the network error has occurred when the establishment of the Bayer connection to the first SIM fails within a set time.
The method of claim 1, wherein the processor comprises:
and controlling to transmit a call forwarding message including information on the second SIM to an external electronic device that originated the call through the IMS server.
The method of claim 1, wherein the processor comprises:
receiving, from the IMS server, a session initiation message corresponding to the call to the first SIM.
The method of claim 6, wherein the processor comprises:
Check the codec (codec) corresponding to the call included in the session initiation message,
Checking whether the identified codec is a codec supported by the first SIM,
If the identified codec is not supported by the first SIM, check a third SIM that supports the identified codec among the plurality of SIMs;
and controlling the IMS server to request forwarding of the call to the third SIM for the call.
In an electronic device,
at least one antenna module; and
At least one processor that communicates with a plurality of subscriber identity modules (SIMs) included in the electronic device and communicates with a communication network and an IP multimedia subsystem (IMS) network through the at least one antenna module,
The at least one processor,
receiving a call request for a first subscriber identity module (SIM) from among the plurality of SIMs from an IMS server of the IMS network;
Checking at least one codec (codec) corresponding to the call,
check whether the at least one identified codec is a codec supported by the first SIM;
If the identified at least one codec is not supported by the first SIM, check a second SIM that supports the identified at least one codec among the plurality of SIMs;
and controlling the IMS server to request forwarding of the call to the second SIM for the call.
The method of claim 8, wherein the processor comprises:
and controlling to transmit a call forwarding message including information on the second SIM to an external electronic device that originated the call through the IMS server.
The method of claim 8, wherein the processor comprises:
receiving, from the IMS server, a session initiation message corresponding to the call to the first SIM.
11. The method of claim 10, wherein the processor,
identifying a codec corresponding to the call from the session initiation message.
The method of claim 8, wherein the processor comprises:
and confirming the second SIM by further considering whether the at least one identified codec is supported by the electronic device.
A method of operating an electronic device, comprising:
receiving a call request for a first subscriber identity module (SIM) from among a plurality of subscriber identity modules (SIMs) included in the electronic device from an IMS server of the IMS network;
transmitting a response message to the call request to the IMS server;
confirming occurrence of a network error related to a call to the first SIM;
checking a second SIM preset for call forwarding among the plurality of SIMs in response to the confirmation of the occurrence of the network error; and
and requesting the IMS server to transfer the call to the second SIM for the call.
14. The method of claim 13, wherein the method comprises:
and determining that the network error has occurred when a message corresponding to a connection failure of a bearer configured for the first SIM is received.
14. The method of claim 13, wherein the method comprises:
When a message related to the error of the IMS server is received, it is determined that the network error has occurred.
14. The method of claim 13, wherein the method comprises:
and determining that the network error has occurred when the establishment of the Bayer connection to the first SIM fails within a set time.
14. The method of claim 13, wherein the method comprises:
and transmitting a call forwarding message including information on the second SIM to an external electronic device that originated the call through the IMS server.
14. The method of claim 13, wherein the method comprises:
and receiving a session initiation message corresponding to the call to the first SIM from the IMS server.
19. The method of claim 18, wherein the method comprises:
checking a codec corresponding to the call included in the session initiation message;
checking whether the identified codec is a codec supported by the first SIM;
if the identified codec is not supported by the first SIM, identifying a third SIM that supports the identified codec among the plurality of SIMs; and
The method of operating an electronic device, further comprising: requesting, to the IMS server, to transfer the call to the third SIM for the call.
A method of operating an electronic device, comprising:
A method of operating an electronic device, comprising:
receiving a call request for a first subscriber identity module (SIM) from among a plurality of subscriber identity modules (SIMs) included in the electronic device from an IMS server of the IMS network;
checking at least one codec corresponding to the call;
checking whether the identified at least one codec is a codec supported by the first SIM;
if the first SIM does not support the identified at least one codec, identifying a second SIM that supports the identified at least one codec among the plurality of SIMs; and
and requesting the IMS server to transfer the call to the second SIM for the call.

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