KR20220126498A - Eletronic device performing invitation of conference call using text message and control method thereof - Google Patents

Abstract

According to various embodiments, a first electronic device comprises at least one processor, wherein the at least one processor may be configured to: establish a conference call session with a plurality of external electronic devices via an IMS server; transmit a text message to a second electronic device while the established conference call session is being held; receive, from the second electronic device, a response message to the text message; and transmit a REFER message to the IMS server in response to receiving the response message.

Description

An electronic device for performing an invitation to a conference call using a text message and a method for controlling the same

Various embodiments of the present disclosure relate to an electronic device for performing an invitation to a conference call using a text message and a method for controlling the same.

As the wireless communication system develops, the wireless communication system may provide an IP (internet protocol)-based multimedia service (eg, voice, image, and data) to an electronic device. For example, the electronic device may receive voice, video, or other media services through an IP multimedia subsystem (IMS) network.

On the other hand, RCS (rich communication services, or rich communication suite) to replace SMS (short message service) has been introduced and actively used, and the RCS standard is published by the GSM Association. RCS is a communication protocol between mobile telephone carriers or between a mobile phone and a carrier, and can provide a richer service than SMS. RCS operates based on IMS and is provided through the IMS network, and is being serviced under the name of advanced messaging, chat, message+, or SMS+.

An electronic device (eg, user equipment, UE) is configured to perform an IMS network through 4G communication (eg, a long term evolution (LTE) network) and/or 5G communication (eg, a 5G network). , and may be provided with a voice and/or video service with at least one external electronic device (eg, an MO terminal or an MT terminal) through the IMS network. For example, the voice and/or video service may include a voice call (eg, voice over LTE (VoLTE)) using 4G communication and/or a voice call (eg, voice over new radio (NR) (VoNR)) using 5G communication. ) may be included.

The electronic device may provide a conference call (eg, conference call) service with two or more external electronic devices (eg, UEs). Through a communication session (eg, a multimedia session) between the electronic device and the IMS server and communication sessions between a plurality of external electronic devices and the IMS server, between the electronic device and the plurality of external electronic devices Voice and/or video telephony services (eg, conference call services) may be provided.

If it is necessary to invite (eg, add) a new external electronic device to an existing conference call, for example, an electronic device (eg, a host device or a host UE) ) may request the IMS server to invite a new external electronic device to an existing conference call.

However, in an example of a conventional conference call invitation method, in order to invite a new external electronic device to an established conference call, a conference call of the electronic device (eg, a host device or a host UE) is held. ) (eg, a communication session (eg, a multimedia session) between the electronic device and the IMS server is temporarily stopped), and thereafter, the electronic device establishes a communication session (eg, a multimedia session) with a new external electronic device. After establishing and holding, and resuming a conference call of the held electronic device (eg, resuming a communication session (eg, multimedia session) between the electronic device and the IMS server), a new external electronic device is resumed conference An invitation to call may be required. In this process, while the conference call of the electronic device is held, the electronic device cannot receive the audio and/or video call service of the conference call, and holding and resuming the conference call of the electronic device and a communication session with the new external electronic device For establishment and hold (eg, a multimedia session), transmission and reception of a SIP (session initiation protocol)-based message is required, so power consumption for a conference call may increase.

According to various embodiments, while maintaining (eg, not holding) a previously established conference call, performing at least one procedure for invitation of a second electronic device (eg, a new external electronic device) A first electronic device and a control method thereof may be provided.

According to various embodiments, while maintaining an established conference call, a text message is transmitted to the second electronic device and a response message to the transmitted text message is received, and the second electronic device is transmitted to a server (eg, an IMS server). A first electronic device for requesting an invitation from a device and a method for controlling the same may be provided.

According to various embodiments, the second electronic device receives a text message from the first electronic device and transmits a response message to the received text message to perform at least one procedure for subscribing to an established conference call. An apparatus and a method for controlling the same may be provided.

According to various embodiments, at least to receive a request for invitation of the second electronic device from the first electronic device and invite the second electronic device to the previously established conference call while maintaining the previously established conference call. A server for performing one procedure and a method for controlling the same may be provided.

According to various embodiments, the first electronic device includes at least one processor, and the at least one processor establishes a conference call session with a plurality of external electronic devices through an IMS server, While the established conference call session is maintained, by sending a text message to the second electronic device, receiving a response message to the text message from the second electronic device, in response to receiving the response message, to the established conference call session It may be configured to transmit a REFER message requesting to invite the second electronic device to the IMS server.

According to various embodiments of the present disclosure, the second electronic device includes at least one processor, and the at least one processor is configured to provide a second electronic device while a conference call session established between the first electronic device and a plurality of external electronic devices is maintained. In response to receiving a text message from the first electronic device, sending a first response message to the text message to the first electronic device, and sending the first response message, inviting the second electronic device to the established conference call session is configured to receive an invitation message from the IMS server for 2 The electronic device may join the established conference call session.

According to various embodiments, the server includes at least one processor, and the at least one processor is configured to include the first electronic device while a conference call session established between the first electronic device and the plurality of external electronic devices is maintained. to receive a REFER message from the REFER message, the REFER message including identification information of the second electronic device, and in response to receiving the REFER message, invite the second electronic device to an established conference call session, the server and It may be configured to establish a call session between the second electronic devices.

According to various embodiments, the continuity of the conference call service of the first electronic device is ensured and the second electronic device is seamlessly invited and subscribed while maintaining the previously established conference call. An electronic device may be invited and joined to a conference call.

According to various embodiments, an invitation and subscription procedure of the second electronic device is performed based on a text message and a response message thereto, so that the second electronic device invites the second electronic device to a conference call according to the intention of the user of the second electronic device and may be subscribed.

According to various embodiments, an invitation and subscription procedure of the second electronic device is performed while maintaining an existing conference call, thereby holding and resuming a conference call and a communication session with the second electronic device (eg, a multimedia session) Complex procedures, such as establishment and hold of , can be omitted. Through this, power consumption for the invitation and subscription procedure of the second electronic device for the conference call may be reduced.

Various effects exerted by the present disclosure are not limited by the above-described effects.

1 is a block diagram illustrating an apparatus for transmitting power wirelessly and an apparatus for receiving power wirelessly, according to various embodiments of the present disclosure.
1 is a block diagram of an electronic device in a network environment, according to various embodiments of the present disclosure;
2A is a block diagram of an electronic device for supporting legacy network communication and 5G network communication, according to various embodiments of the present disclosure;
2B is a block diagram of an electronic device for supporting legacy network communication and 5G network communication, according to various embodiments of the present disclosure;
3 illustrates a communication system including an IMS network, in accordance with various embodiments.
4A is a signal flow diagram illustrating a method of establishing a call session between UE-1 and UE-2 according to various embodiments.
4B is a signal flow diagram illustrating a method of establishing a conference call session between a first electronic device, UE-A, and UE-B, according to various embodiments of the present disclosure.
4C is a signal flow diagram illustrating a method of inviting a new UE to a conference call session established with a plurality of external electronic devices according to a comparative example.
5 is a signal flow diagram illustrating a method of inviting a second electronic device to a conference call session established with a plurality of external electronic devices, according to various embodiments of the present disclosure;
6A is a flowchart illustrating an operation of a first electronic device in a process of inviting a second electronic device to an established conference call session, according to various embodiments of the present disclosure;
6B is a flowchart illustrating an operation of the second electronic device in a process of inviting the second electronic device to an established conference call session, according to various embodiments of the present disclosure;
7 is a flowchart illustrating a method for a first electronic device to transmit a REFER message based on a time point at which a response message is received, according to various embodiments of the present disclosure.
8 is a flowchart illustrating a method for a first electronic device to transmit a REFER message based on whether an invitation from a second electronic device is accepted, according to various embodiments of the present disclosure;
9A is a diagram for describing a method of receiving a user input for inviting a second electronic device through a touch screen of a first electronic device, according to various embodiments of the present disclosure;
9B is a diagram for describing a method of receiving a user input regarding whether to accept an invitation from a first electronic device through a touch screen of a second electronic device, according to various embodiments of the present disclosure;
FIG. 9C is a diagram for describing a screen displayed through a display of a first electronic device when a second electronic device does not accept an invitation to a conference call session, according to various embodiments of the present disclosure;
9D is a diagram for describing a screen displayed through a touch screen of a first electronic device when a second electronic device does not respond to an invitation to a conference call session, according to various embodiments of the present disclosure;
10A is a flowchart illustrating a method of determining, by a first electronic device, whether to transmit a REFER message, based on a character string included in a response message, according to various embodiments of the present disclosure;
FIG. 10B is a diagram for describing a method in which a second electronic device notifies whether an invitation is accepted to a first electronic device through a response message, according to various embodiments of the present disclosure;
11A is a flowchart illustrating a method for a first electronic device to determine whether to transmit a REFER message based on a time point when a response message is received from a second electronic device, according to various embodiments of the present disclosure;
11B illustrates an example of a screen displayed on the second electronic device when the second electronic device transmits a response message while a conference call session is not maintained, according to various embodiments of the present disclosure.

1 is a block diagram of an electronic device 101 in a network environment 100, according to various embodiments.

Referring to FIG. 1 , in a 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 at least one of the electronic device 104 and 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 . 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, a program 140) to execute at least one other component (eg, a 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 , 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 a main processor 121 (eg, a central processing unit or an application processor) or a secondary processor 123 (eg, a graphic processing unit, a neural network processing unit) 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 an 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 unit) 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 the artificial intelligence model is performed, or may be performed through a separate server (eg, the server 108). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but in the above example not limited The artificial intelligence model may include a plurality of artificial neural network layers. Artificial neural networks include deep neural networks (DNNs), convolutional neural networks (CNNs), recurrent neural networks (RNNs), restricted boltzmann machines (RBMs), deep belief networks (DBNs), bidirectional recurrent deep neural networks (BRDNNs), It may be one of deep Q-networks or a combination of two or more of the 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 can be used to receive incoming calls. 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 a 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 . The electronic device 102) (eg, a speaker or headphones) may output a sound.

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 an 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 wireless 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 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 uses various techniques for securing performance in a high-frequency band, for example, beamforming, massive multiple-input and multiple-output (MIMO), all-dimensional multiplexing. It may support technologies such as full dimensional MIMO (FD-MIMO), an array antenna, analog beam-forming, or a large scale antenna. The wireless communication module 192 may support various requirements defined 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 for realizing URLLC ( Example: Downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) can 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 selected. 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 ( e.g. 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 part of the operations performed by the electronic device 101 may be executed by one or more external electronic devices 102 , 104 , or 108 . For example, when the electronic device 101 needs 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 purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device 101 may provide 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. The 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.

FIG. 2A is a block diagram 200a of an electronic device 101 for supporting legacy network communication and 5G network communication, according to various embodiments of the present disclosure. 2B is a block diagram 200b of an electronic device 101 for supporting legacy network communication and 5G network communication, according to various embodiments.

Referring to FIG. 2A , the electronic device 101 includes a first communication processor 212 , a second communication processor 214 , a first radio frequency integrated circuit (RFIC) 222 , a second RFIC 224 , and a second communication processor 214 . 3 RFIC 226 , a fourth RFIC 228 , a first radio frequency front end (RFFE) 232 , a second RFFE 234 , a first antenna module 242 , a second antenna module 244 and / or an antenna 248 . The electronic device 101 may further include a processor 120 and a memory 130 . The network 199 may include a first cellular network 292 and a second cellular network 294 . According to another embodiment, the electronic device 101 may further include at least one component among the components illustrated in FIG. 1 , and the network 199 may further include at least one other network. According to an embodiment, a first communication processor 212 , a second communication processor 214 , a first RFIC 222 , a second RFIC 224 , a fourth RFIC 228 , a first RFFE 232 , and the second RFFE 234 may form at least a part of the wireless communication module 192 . According to another embodiment, the fourth RFIC 228 may be omitted or may be included as a part of the third RFIC 226 .

The first communication processor 212 may support establishment of a communication channel of a band to be used for wireless communication with the first cellular network 292 and legacy network communication through the established communication channel. According to various embodiments, the first cellular network 292 may be a legacy network including a second generation (2G), 3G, 4G, or long term evolution (LTE) network. The second communication processor 214 establishes a communication channel corresponding to a designated band (eg, about 6 GHz to about 60 GHz) among bands to be used for wireless communication with the second cellular network 294 , and 5G through the established communication channel It can support network communication. According to various embodiments, the second cellular network 294 may be a 5G network defined by 3GPP. Additionally, according to an embodiment, the first communication processor 212 or the second communication processor 214 corresponds to another designated band (eg, about 6 GHz or less) among bands to be used for wireless communication with the second cellular network 294 . 5G network communication through the establishment of a communication channel and the established communication channel can be supported.

The first communication processor 212 may transmit/receive data to and from the second communication processor 214 . For example, data that has been classified to be transmitted over the second cellular network 294 may be changed to be transmitted over the first cellular network 292 . In this case, the first communication processor 212 may receive transmission data from the second communication processor 214 . For example, the first communication processor 212 may transmit and receive data through the second communication processor 214 and the interprocessor interface 213 . The interprocessor interface 213 may be implemented as, for example, a universal asynchronous receiver/transmitter (UART) (eg, high speed-UART (HS-UART) or peripheral component interconnect bus express (PCIe) interface), but the The type is not limited, or the first communication processor 212 and the second communication processor 214 may exchange control information and packet data information using, for example, a shared memory. The first communication processor 212 may transmit/receive various information to and from the second communication processor 214 , such as sensing information, information on output strength, and resource block (RB) allocation information.

Depending on the implementation, the first communication processor 212 may not be directly connected to the second communication processor 214 . In this case, the first communication processor 212 may transmit and receive data through the second communication processor 214 and the processor 120 (eg, an application processor). For example, the first communication processor 212 and the second communication processor 214 may transmit and receive data with the processor 120 (eg, an application processor, AP) through an HS-UART interface or a PCIe interface, There are no restrictions on the type of interface. Alternatively, the first communication processor 212 and the second communication processor 214 may exchange control information and packet data information using a shared memory with the processor 120 (eg, an application processor, AP). can

According to one embodiment, the first communication processor 212 and the second communication processor 214 may be implemented in a single chip or in a single package. According to various embodiments, the first communication processor 212 or the second communication processor 214 may include the processor 120 (eg, the main processor 121 ), the auxiliary processor 123 , or the communication module 190 . and may be formed on a single chip or within a single package. For example, as shown in FIG. 2B , the unified communication processor 260 may support both functions for communication with the first cellular network 292 and the second cellular network 294 .

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

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

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

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

According to an embodiment, the first RFIC 222 and the second RFIC 224 may be implemented as at least a part of a single chip or a single package. According to various embodiments, when the first RFIC 222 and the second RFIC 224 in FIG. 2A or 2B are implemented as a single chip or a single package, the second RFIC 224 may be omitted. In this case, the first RFIC 222 is connected to the first RFFE 232 and the second RFFE 234 so that the first RFIC 222 transmits a baseband signal to the first RFFE 232 and/or the second RFFE. It is converted into a signal of a band supported by the 234 , and the converted signal may be transmitted to one of the first RFFE 232 and the second RFFE 234 . According to an embodiment, the first RFFE 232 and the second RFFE 234 may be implemented as a single chip or at least a part of a single package. According to an embodiment, at least one antenna module of the first antenna module 242 or the second antenna module 244 may be omitted or may be combined with another antenna module to process RF signals of a plurality of corresponding bands.

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

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

The second cellular network 294 (eg, 5G network) may be operated independently (eg, Stand-Alone (SA)) or connected to the first cellular network 292 (eg, legacy network). Example: Non-Stand Alone (NSA)). For example, the 5G network may have only an access network (eg, 5G radio access network (RAN) or next generation RAN (NG RAN)), and may not have a core network (eg, next generation core (NGC)). In this case, after accessing the access network of the 5G network, the electronic device 101 may access an external network (eg, the Internet) under the control of a core network (eg, evolved packed core (EPC)) of the legacy network. Protocol information for communication with a legacy network (eg, LTE protocol information) or protocol information for communication with a 5G network (eg, NR protocol information) is stored in the memory 230, and other components (eg, the processor 120, may be accessed by the first communication processor 212 , and/or the second communication processor 214 .

3 illustrates a communication system including an IMS network, in accordance with various embodiments.

Referring to FIG. 3 , the electronic device 101 may each or simultaneously access the first communication network 310 (eg, 5G NR communication network) or the second communication network 320 (eg, 4G LTE communication network). have. Also, the electronic device 101 may access the IMS network of the IMS server 330 through the first communication network 310 or may access the IMS network of the IMS server 330 through the second communication network 320 . .

According to various embodiments, the electronic device 101 may provide a communication service (eg, a voice call or a voice call service) with another electronic device. According to an embodiment, the communication system may include a plurality of access networks (eg, the first communication network 310 or the second communication network 320 ) provided by a plurality of communication operators, respectively.

According to an embodiment, the electronic device 101 may modulate or demodulate a signal for communicating with at least one communication network (eg, the first communication network 310 ) through the communication module 190 . For example, the electronic device 101 may be connected to at least one telecommunications network (eg, a communication network) through wireless or wired communication to communicate with other electronic devices. The electronic device 101 may control communication with at least one communication network or at least one IP service network. According to an embodiment, the electronic device 101 may include hardware including at least one processor and software for controlling the same. The electronic device 101 may receive a communication service through the first communication network 310 and the second communication network 320 or the IMS network.

According to an embodiment, the first communication network 310 and the second communication network 320 may include a communication network operated by a communication service provider.

For example, the first communication network 310 and the second communication network 320 may include at least one of an NR network, an LTE network, or a mobile world interoperability for microwave access (Wimax) network. Alternatively, it may include a code division multiple access (CDMA) 1x network, a wideband code division multiple access (WCDMA) network, or a global system for mobile communications (GSM) network. For example, the first communication network 310 and the second communication network 320 may provide a communication service to the electronic device 101 or another electronic device through a wired or wireless interface. According to an embodiment, the first communication network 310 and the second communication network 320 may be heterogeneous communication networks operated by the same communication operator but using different types of protocols. For example, the first communication network 310 may be an NR communication network operated by a specific communication operator, and the second communication network 320 may be an LTE communication network operated by the specific communication operator. According to another embodiment, the first communication network 310 and the second communication network 320 are operated by different communication operators, respectively, and may be communication networks using different types of protocols. For example, the first communication network 310 may be an NR communication network operated by a first communication operator, and the second communication network 320 may be an LTE communication network operated by a second communication operator.

According to an embodiment, the IMS network may include an IP-based service network operated by a communication service provider (or service provider). The IMS server 330 may provide an IP-based communication service (eg, a multimedia service) to the electronic device 101 and other electronic devices. For example, the IMS network may include an IMS network operated by a communication service provider. According to an embodiment, the IMS network may include an IP service network operated by another service provider related to (eg, entered into an agreement with) a communication service provider of the IMS network.

According to an embodiment, the electronic device 101 may attach to a plurality of communication networks operated by different communication operators or may register the electronic device 101 in the plurality of communication networks. The electronic device 101 may obtain a plurality of pieces of subscriber information respectively corresponding to a plurality of communication networks. For example, the electronic device 101 may obtain a plurality of SIM information by using a plurality of subscriber identification module (SIM) card slots. For example, the electronic device 101 may include a first SIM card corresponding to the first communication service provider and a second SIM card corresponding to the second communication service provider. The communication module 190 of the electronic device 101 may access the first communication network 310 of the first communication operator based on information (or first subscriber information) of the first SIM card. Alternatively, the communication module 190 may access the second communication network 320 of the second communication service provider based on the information of the second SIM card (or the second subscriber information).

According to an embodiment, when the electronic device 101 supports a plurality of wireless connections, the electronic device 101 may concurrently access the first communication network 310 and the second communication network 320 . . Alternatively, when the electronic device 101 does not support a plurality of wireless connections at the same time, the electronic device 101 may access one of the first communication network 310 and the second communication network 320 . . According to an embodiment, even when the electronic device 101 includes a plurality of subscriber information and supports a plurality of wireless connections, in an area in which the electronic device 101 is located, the first communication network 310 of the first communication operator ) is the service, the communication module 190 may access the first communication network 310 to receive the communication service. According to an embodiment, each of the plurality of pieces of subscriber information may include, for example, a plurality of pieces of identification information of different types used in heterogeneous communication networks of the same operator. Each of the subscriber information is, for example, one of international mobile subscriber identity (IMSI), which is identification information corresponding to the LTE network of a specific communication service provider, or public user identity (PUI), which is identification information corresponding to the IMS network of the specific communication service provider. Or it may include a combination thereof. In addition, the plurality of subscriber information is stored in one SIM card, stored in an internal storage space (eg, memory) of the electronic device 101 , or another electronic device that can be connected to the electronic device 101 (eg, server) may be stored.

According to an embodiment, the electronic device 101 may acquire a plurality of subscriber information from an internal storage space or from the outside, and register subscriber information corresponding to each IP service network (eg, IMS network). can For example, when the electronic device 101 simultaneously supports a plurality of wireless connections, the communication module 190 obtains (or allocates) a first address (eg, an IP address) through the first communication network 310 . received), and may be registered with the IMS server 330 (eg, IMS network) based on the first address. According to another embodiment, when the electronic device 101 supports only one wireless connection at the same time, the communication module 190 connects to any one of the first communication network 310 and the second communication network 320 . An address may be acquired (or assigned) through the .IP and registered in the IMS server 330 (eg, an IMS network) based on the address. According to an embodiment, even when the electronic device 101 supports a plurality of wireless connections, when only the first communication network 310 of the first communication operator is provided in the area where the electronic device 101 is located, , the communication module 190 may obtain an address through the first communication network 310 and register it with the IMS server 330 (eg, IMS network) based on the address.

According to an embodiment, the second communication network 320 may include entities such as an evolved node B (eNB), a mobility management entity (MME), and a gateway. The eNB may be a device (eg, a base station) that provides a wireless interface (or wireless connection) between at least one user equipment and an LTE network. For example, the eNB may control a wireless connection of the electronic device 101 and may control a radio resource (eg, frequency) allocated to the wireless connection. The MME may manage a connection to at least one electronic device 101 connected through the eNB. For example, the MME may provide authentication for the electronic device 101 when the electronic device 101 accesses an LTE communication network, track or manage mobility of the electronic device 101, and provide a communication service. The gateway may include a serving gateway (S-GW) and a public data network gateway (PGW). For example, the gateway may route packets communicating with LTE communication networks and external communication networks (eg Internet or IMS networks), provide a firewall, or assign an address (eg IP address) to at least one user device. can do. According to some embodiments, the LTE communication network includes a plurality of entities, for example, one or more of an evolved node B (eNB), a mobility management entity (MME), or a gateway. Can include dogs.

According to an embodiment, the IMS server 330 may include entities such as a call session control function (CSCF) and an application server (AS). For example, the IMS network is an IP service network operated by the first communication service provider, and may provide IP-based multimedia services to subscribers. The CSCF may include, for example, at least one of a proxy call session control function (P-CSCF), a serving call session control function (S-CSCF), and an interrogating call session control function (I-CSCF). For example, the CSCF may register the electronic device 101 with the IMS server 330 (eg, the IMS network) in response to the registration request of the electronic device 101 . In addition, the CSCF may provide a function related to a call connection of the IMS server 330 (eg, an IMS network). The AS is a device for supporting a service provided through the IMS server 330 (eg, an IMS network), and may include, for example, a telephony application server (TAS) or a voice call continuity server (VCC Server). The TAS may provide a multimedia additional service (eg, a caller ID or ringback tone) to the at least one electronic device 101 . The VCC Server may provide seamless handover between heterogeneous networks (eg, CDMA network and IMS network) to at least one user device.

According to an embodiment, the electronic device 101 may access the first communication network 310 or the second communication network 320 . For example, the electronic device 101 may request access (eg, attach) to the first communication network 310 or the second communication network 320 through a wireless connection with the gNB or eNB. In response to the access request (or registration request) of the electronic device 101 , the MME may perform an authentication procedure associated with the electronic device 101 , and request a registration (eg, create) associated with the electronic device 101 to the gateway session request) can be sent. The gateway may allocate at least one address (eg, an IP address) to the electronic device 101 in response to the registration request. For example, the second communication network 320 may provide a connection between the electronic device 101 and an external communication network (eg, internet or IMS network) based on at least one address assigned to the electronic device 101 . can

According to an embodiment, the electronic device 101 registers the electronic device 101 with the IMS server 330 (eg, an IMS network) through the first communication network 310 or the second communication network 320 . can For example, the electronic device 101 may transmit a registration request (eg, attach) to the second communication network 320 (eg, P-GW) corresponding to the first subscriber information. The second communication network 320 may allocate at least one address (eg, an IP address) to the electronic device 101 in response to the registration request. The electronic device 101 may transmit a registration request (eg, session initiation protocol (SIP) register) to the IMS server 330 (eg, IMS network) using the at least one address. According to an embodiment, the second communication network 320 and the IMS network may be operated by different communication operators, respectively.

According to various embodiments, the electronic device 101 obtains at least one piece of address information (eg, an IP address or an identifier for the electronic device) from the communication networks, and through the communication network, A registration request (eg, SIP register) for the IMS server 330 (eg, IMS network) including address information may be transmitted to the IMS server 330 . For example, in response to the registration request, the IMS server 330 may register the electronic device 101 with the IMS server 330 (eg, an IMS network) and provide a service.

4A illustrates establishing a call session (eg, a one-to-one call session or a one-to-one multimedia session) between user equipment (UE)-1 401 and UE-2 403, according to various embodiments. It is a signal flow diagram 400a for explaining the method. Since at least a part of the call session establishment procedure shown in FIG. 4A is described in, for example, 3GPP standard document 24.228, the call session establishment procedure will be briefly described below.

According to various embodiments, each of UE-1 401 and UE-2 403 may include at least some of the same hardware components as the electronic device 101 of FIGS. 1 , 2A and/or 2B . can For example, UE-1 401 and UE-2 403 each have a processor 120 and a wireless communication module 192 (eg, a first communication processor 212 and/or a second communication processor 214 ). )) may be included. In describing various embodiments of the present disclosure, unless otherwise specified, the operation of the UE-1 401 and/or the UE-2 403 is performed by at least one processor (eg, the processor 120 , the first It may mean that the communication processor 212 and/or the second communication processor 214 perform a specified operation or control another hardware component to perform a specified operation.

Meanwhile, in describing embodiments of the drawings to be described later, each of the first electronic device 423 and the second electronic device 465 includes a processor 120 and a wireless communication module 192 (eg, a first communication processor ( 212 ) and/or second communication processor 214 ), and the operation of the first electronic device 423 and/or the second electronic device 465 includes at least one processor (eg, the processor 120 ). ), the first communication processor 212 and/or the second communication processor 214) may refer to performing a specified operation or controlling other hardware components to perform a specified operation.

According to various embodiments, the server 405 may include the IMS server 330 shown in FIG. 3 . According to various embodiments, the server 405 may provide a voice and/or video call service (eg, a one-to-one call service and/or a conference call service) and/or a service based on an RCS protocol (eg, an RCS messaging service). ) can be provided. According to an embodiment, the server 405 may include two or more servers. For example, the server 405 may include a first server for providing a voice and/or video call service (eg, a one-to-one call service and/or a conference call service) and a service based on the RCS protocol (eg, an RCS messaging service). ) may include a second server for providing.

According to various embodiments, the server 405 may include a processor 120 and a wireless communication module 192 (eg, a first communication processor 212 and/or a second communication processor 214 ). , the operation of the server 405, at least one processor (eg, the processor 120, the first communication processor 212 and / or the second communication processor 214) to perform a specified operation, or other hardware components may mean controlling to perform a specified operation.

According to various embodiments, UE-1 401 sends an INVITE message 407 to UE-2 403 via server 405 , and UE-2 403 sends INVITE message 407 via server 405 . Message 407 may be received from UE-1 401 . For example, the INVITE message 407 may indicate establishment (eg, establishment) of a call session (eg, a one-to-one call session or a one-to-one multimedia session) between UE-1 401 and UE-2 403 . It may include a requesting SIP-based message.

According to various embodiments, the UE-2 403 transmits the SIP-based 100 Trying message 409 to the UE-1 401 through the server 405 in response to the received INVITE message 407, UE-1 401 may receive 100 Trying message 409 from UE-2 403 via server 405 .

According to various embodiments, the UE-2 403 transmits a SIP-based 183 Session in progress message 411 to the UE-1 401 through the server 405, and the UE-1 401 is the server Through (405) 183 Session in progress message (411) may be received from the UE-2 (403). For example, the 183 Session in progress message 411 may include information on media stream capabilities of the UE-2 403 .

According to various embodiments, the UE-1 401 transmits the SIP-based PRACK message 413 to the UE-2 403 via the server 405 , and the UE-2 403 sends the PRACK message 413 . ) may be received from the UE-1 401 . For example, the PRACK message 413 may include information on codecs to be used for media flows through a call session to be established.

According to various embodiments, the UE-2 403 sends a 200 OK message 415 to the UE-1 401 via the server 405 in response to the received PRACK message 413 , and the UE-1 401 may receive a 200 OK message 415 from UE-2 403 via server 405 . For example, the 200 OK message 415 may include a SIP-based message indicating that the PRACK message 413 sent by the UE-1 401 has been received by the UE-2 403 .

According to various embodiments, the UE-2 403 transmits the SIP-based 180 Ringing message 417 to the UE-1 401 through the server 405 , and the UE-1 401 is the server 405 . ) through the 180 Ringing message 417 may be received from the UE-2 (403).

According to various embodiments, UE-2 403 sends a 200 OK message 419 to UE-1 401 via server 405 in response to the received INVITE message 407 and UE- 1 401 may receive a 200 OK message 419 from UE-2 403 via server 405 .

According to various embodiments, a call session (eg, one-to-one) between the UE-1 401 and the UE-2 403 through the transmission/reception procedure from the INVITE message 407 to the 200 OK message 419 described above. call session) may be established (eg, a normal call setup procedure is completed), and through the established call session, voice and / or a video call service (eg, one-to-one call service) may be provided.

Although not shown, after transmission of the 200 OK message 415 by the UE-2 403 and/or the reception of the 200 OK message 415 by the UE-1 401, at least one SIP-based message is transmitted and/or received. For example, the UE-1 401 transmits an UPDATE message (not shown) to the UE-2 403 through the server 405, and the UE-2 403 sends the server 405 an UPDATE message (not shown). time) and may transmit a 200 OK message indicating that an UPDATE message (not shown) has been received to the UE-1 401 through the server 405 .

4B illustrates a method of establishing a conference call session (eg, a multi-party multimedia session) between the first electronic device 423 , UE-A 425 , and UE-B 427 , according to various embodiments. It is a signal flow diagram 400b for explanation. The procedure for establishing a conference call session shown in FIG. 4B is, for example, at least partially described in 3GPP standard document 24.605. Hereinafter, a procedure for establishing a conference call session will be briefly described.

According to various embodiments, the first electronic device 423 includes a processor 120 and a wireless communication module 192 (eg, a first communication processor 212 and/or a second communication processor 214 ). At least one processor (eg, the processor 120 , the first communication processor 212 , and/or the second communication processor 214 ) performs a specified operation for the operation of the first electronic device 423 . Alternatively, it may mean controlling other hardware components to perform a specified operation.

According to various embodiments, a call session 429 (eg, a one-to-one call session or a one-to-one multimedia session) may be established between the first electronic device 423 and the UE-A 425 . For example, based on the general call setup procedure (eg, the procedure of the signal flow diagram 400a shown in FIG. 4A ) being performed between the first electronic device 423 and the UE-A 425 , the first electronic device ( 423 ) and a call session 429 between UE-A 425 may be established.

According to various embodiments, the first electronic device 423 configures the server 405 to establish a conference call session between the first electronic device 423 , the UE-A 425 and the UE-B 427 . Through this, the INVITE message 431 may be transmitted to the UE-A 425 , and the UE-B 427 may receive the INVITE message 431 from the first electronic device 423 through the server 405 . For example, the INVITE message 431 is based on a SIP requesting hold (eg, temporary stop) of the call session 429 between the previously established first electronic device 423 and the UE-A 425 . may contain messages from

According to various embodiments, the UE-A 425 transmits a 200 OK message 433 to the first electronic device 423 via the server 405 in response to the received INVITE message 431 , and The electronic device 423 may receive a 200 OK message 433 from the UE-A 425 through the server 405 . For example, the 200 OK message 433 may include a SIP-based message indicating that the INVITE message 431 transmitted by the first electronic device 423 has been received by the UE-A 425 . According to various embodiments, a call session 429 between the first electronic device 423 and the UE-A 425 (eg: A multimedia session between the first electronic device 423 and the server 405 and/or a multimedia session between the server 405 and the UE-A 425) may be held.

According to various embodiments, a call session 435 between the first electronic device 423 and the UE-B 427 may be established. For example, while the previously established call session 429 between the first electronic device 423 and the UE-A 425 is held, a general call between the first electronic device 423 and the UE-B 427 is held. A call session 435 between the first electronic device 423 and the UE-B 427 may be established based on the performing of the setup procedure (eg, the procedure of the signal flow diagram 400a illustrated in FIG. 4A ).

According to various embodiments, the first electronic device 423 is configured to establish a conference call session between the first electronic device 423 , the UE-A 425 and the UE-B 427 through the server 405 . The INVITE message 437 may be transmitted to the UE-B 429 , and the UE-B 427 may receive the INVITE message 437 from the first electronic device 423 through the server 405 . For example, the INVITE message 437 is a SIP requesting hold (eg, temporarily stop) of the call session 435 between the previously established first electronic device 423 and the UE-B 427 . It may include a message based on it.

According to various embodiments, the UE-B 427 transmits a 200 OK message 439 to the first electronic device 423 via the server 405 in response to the received INVITE message 437 , and The electronic device 423 may receive a 200 OK message 439 from the UE-B 427 through the server 405 . For example, the 200 OK message 439 may include a SIP-based message indicating that the INVITE message 437 transmitted by the first electronic device 423 has been received by the UE-B 427 . According to various embodiments, a call session 435 between the first electronic device 423 and the UE-B 427 (eg: A multimedia session between the first electronic device 423 and the server 405 , and/or a multimedia session between the server 405 and the UE-B 427 ) may be held.

According to various embodiments, the first electronic device 423 provides a call session 429 between the first electronic device 423 and the UE-A 425 and the first electronic device 423 and the UE-B ( After the call session 435 between 427 is held, an INVITE message ( 441) can be transmitted. For example, the INVITE message 441 may include a SIP-based message requesting the server 405 to open (eg, setup) a conference call session.

According to various embodiments, the server 405, in response to receiving the INVITE message 411, allocates a CS (conference session) resource (resource) for the conference call (allocate) 443, and 200 OK message ( 445 may be transmitted to the first electronic device 423 .

According to various embodiments, the first electronic device 423 confirms that the CS resource for the conference call has been allocated, based on receiving the 200 OK message 445 , and connects the UE-A 425 to the established conference call session. ), it may transmit a SIP-based REFER message 447 (eg, a REFER request) to the server 405 . For example, the REFER message 447 may include a From header including identification information (eg, SIP address information and/or tag number) of the host device (eg, the first electronic device 423 ). header)), identification information (eg, To header including SIP address information) and method information (eg, Refer-To header) of a device to be invited (eg, UE-A (425)) ) may be included.

According to various embodiments, in response to receiving the REFER message 447 , the server 405 sends a first SIP-based 202 Accepted message 449 indicating that it accepts the received REFER message 447 . An INVITE message 451 for transmitting to the electronic device 423 and inviting the UE-A 425 to the established conference call session may be transmitted to the UE-A 425 . For example, the INVITE message 451 includes identification information (eg, a From header including SIP address information and/or a tag number) of a host device (eg, the first electronic device 423), and a device to be invited (eg, a From header). : UE-A (425)) identification information (eg, To header including SIP address information) and conference call session identification information (eg, Contact header including SIP address information and/or isfocus feature). can

According to various embodiments, in response to receiving the INVITE message 451 , the UE-A 425 transmits to the server 405 a SIP-based 200 OK message 453 indicating reception of the INVITE message 451 . can Through the transmission/reception procedure of the INVITE message 451 and the 200 OK message 453 described above, the multimedia session between the server 405 and the UE-A 425 is resumed (resume) and the UE-A ( 425 may be subscribed (eg, UE-A 425 may join an established conference call session). In describing various embodiments of the present disclosure, the UE-A 425 being oversubscribed (eg, participating in) for an established conference call session means that the first electronic device 423 and the UE-A 423 A conference call session involving A 425 may be described as being established.

According to various embodiments, after confirming that the CS resource for the conference call has been allocated, the first electronic device 423 SIP to the server 405 to invite the UE-B 427 to the established conference call session. based REFER message 455 (eg, REFER request). For example, the REFER message 455 includes identification information (eg, a From header including SIP address information and/or tag number) of a host device (eg, the first electronic device 423), and a device to be invited (eg, a From header). : UE-B (427)) identification information (eg, To header including SIP address information) and method information (eg, Refer-To header) may be included.

According to various embodiments, in response to receiving the REFER message 455, the server 405 sends a SIP-based 202 Accepted message 457 indicating accepting the received REFER message 455 to the first electronic device ( 423 ) and may send an INVITE message 459 to UE-B 427 to invite UE-B 427 to the established conference call session. For example, the INVITE message 459 may include identification information (eg, a From header including SIP address information and/or a tag number) of the host device (eg, the first electronic device 423 ), and a device to be invited (eg, a From header). : UE-B (427)) identification information (eg, To header including SIP address information) and conference call session identification information (eg, Contact header including SIP address information and/or isfocus feature). can

According to various embodiments, the UE-B 427, in response to receiving the INVITE message 459 , transmits to the server 405 a SIP-based 200 OK message 461 indicating receipt of the INVITE message 459 . can Through the procedure of transmitting and receiving the INVITE message 459 and the 200 OK message 461 described above, the multimedia session between the server 405 and the UE-B 427 is resumed, and the UE-B 427 is in the established conference call session. may be subscribed (eg, UE-B 427 may join an established conference call session). In describing various embodiments of the present disclosure, joining (eg, participating in) the UE-B 427 for an established conference call session includes the first electronic device 423 and the UE-B A conference call session including 427 may be described as being established.

According to various embodiments, based on the above-described invitation and/or subscription of the UE-A 425 and the UE-B 427 , the first electronic device 423 , the UE-A 425 and the UE-B A conference call session 463 including 427 may be established, and through the established conference call session 463 , the first electronic device 423 , UE-A 425 and UE-B 427 . A voice and/or video call service (eg, a conference call service) may be provided.

Although not shown, the server 405 transmits the 202 Accepted messages 449 and 457 to the first electronic device 423, and then sends a NOTIFY message (eg, NOTIFY request) to the first electronic device ( 423) can be transmitted. For example, the NOTIFY message is information about the progress of processing based on the accepted REFER messages 447 and 455 (eg, a device to be invited (eg, UE-A 425) and / or UE -B(427))). The first electronic device 423 may receive the NOTIFY message and transmit a 200 OK message indicating that the NOTIFY message has been received to the server 405 .

According to one embodiment, different from the illustration, after receiving the REFER messages 447 and 455 , the server 405 sends a REFER message to the UE-A 425 and/or the UE-B 427 , may receive an INVITE request message from UE-A 425 and/or UE-B 427 and send INVITE messages 451, 459 to UE-A 425 and/or UE-B 427, Based on this, a conference call session 463 including the first electronic device 423 , the UE-A 425 , and the UE-B 427 may be established.

FIG. 4C illustrates a conference call session established with a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 of FIG. 4B ) (eg, a conference call session of FIG. 4B ) according to a comparative example. 463 ) is a signal flow diagram 400c for explaining a method of inviting (eg, adding) a new UE (eg, the second electronic device 465 ). The procedure for inviting a new UE (eg, the second electronic device 465) to the conference call session 463 illustrated in FIG. 4C is described at least in part in, for example, 3GPP standard document 24.605, in the following: A procedure for inviting a new UE (eg, the second electronic device 465) will be briefly described.

The second electronic device 465 may include a processor 120 and a wireless communication module 192 (eg, a first communication processor 212 and/or a second communication processor 214 ), and a second electronic device 465 . The operation of the device 465 may be performed by at least one processor (eg, the processor 120 , the first communication processor 212 , and/or the second communication processor 214 ) performing a specified operation, or by another hardware component. It may mean controlling to perform a specified operation.

A conference call session 463 including the first electronic device 423 and a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 ) may be established. For example, a conference call setup procedure including the first electronic device 423 and a plurality of external electronic devices (eg, UE-A 425 and UE-B 427) (eg, a conference call setup procedure) : The first electronic device 423 and a plurality of external electronic devices (eg, UE-A 425 and UE-B of FIG. 4B ) are performed based on the procedure of the signal flow diagram 400b shown in FIG. 4B ). A conference call session 463 including 427 ) may be established.

The first electronic device 423 may transmit an INVITE message 467 to the server 405 through the server 405 to invite the second electronic device 465 to the established conference call session 463 . For example, the INVITE message 467 is a SIP requesting hold of the previously established conference call session 463 (eg, hold of the multimedia session between the first electronic device 423 and the server 405 ). It may include a message based on it.

The server 405 may transmit a 200 OK message 469 to the first electronic device 423 in response to receiving the INVITE message 467 . For example, the 200 OK message 469 may include a SIP-based message indicating that the INVITE message 467 transmitted by the first electronic device 423 has been received by the server 405 . Through the above-described procedure of transmitting and receiving the INVITE message 467 and the 200 OK message 469, a call session between the first electronic device 423 and the server 405 (eg, the first electronic device 423 and the server ( 405) may be held.

A call session 471 between the first electronic device 423 and the second electronic device 465 may be established. For example, based on a general call setup procedure (eg, the procedure of the signal flow diagram 400a illustrated in FIG. 4A ) being performed between the first electronic device 423 and the second electronic device 465 , the first electronic device A call session 471 between the 423 and the second electronic device 465 may be established.

The first electronic device 423 may transmit an INVITE message 473 to the second electronic device 465 through the server 405 to hold the established call session 471 . For example, the INVITE message 473 may include a SIP-based message requesting hold of the established call session 471 .

In response to receiving the INVITE message 473 , the second electronic device 465 may transmit a 200 OK message 475 to the first electronic device 423 via the server 405 . For example, the 200 OK message 475 may include a SIP-based message indicating that the INVITE message 473 transmitted by the first electronic device 423 has been received by the second electronic device 465 . . Through the above-described procedure of transmitting and receiving the INVITE message 473 and the 200 OK message 475 , a call session (eg, the first electronic device 423 ) between the first electronic device 423 and the second electronic device 465 . and a multimedia session between the second electronic device 465) may be held.

The first electronic device 423 sends an INVITE message 477 for resuming the held conference call session 463 (eg, a multimedia session between the first electronic device 423 and the server 405) to the server 405 . can be sent to For example, the INVITE message 477 may include a SIP-based message requesting resumption of a held conference call session 463 (eg, a multimedia session between the first electronic device 423 and the server 405 ). can

In response to receiving the INVITE message 477 , the server 405 may transmit a SIP-based 200 OK message 479 indicating reception of the INVITE message 477 to the first electronic device 423 . The held conference call session 463 (eg, a multimedia session between the first electronic device 423 and the server 405) is to be resumed through the above-described procedure of transmitting and receiving the INVITE message 477 and the 200 OK message 479 . can

When the first electronic device 423 receives the 200 OK message 445 , the held conference call session 463 (eg, a multimedia session between the first electronic device 423 and the server 405 ) is resumed. In order to confirm that this has been done and to invite the second electronic device 465 to the resumed conference call session 463 , a SIP-based REFER message 481 (eg, REFER request) may be transmitted to the server 405 . . For example, the REFER message 481 includes identification information (eg, a From header including SIP address information and/or a tag number) of a host device (eg, the first electronic device 423), a device to be invited (eg, : may include identification information (eg, To header including SIP address information) and method information (eg, Refer-To header) of the second electronic device 465).

In response to receiving the REFER message 481, the server 405 transmits a SIP-based 202 Accepted message 483 indicating that it accepts the received REFER message 481 to the first electronic device 423 and resumes. An INVITE message 485 for inviting the second electronic device 465 to the conference call session 463 may be transmitted to the second electronic device 465 . For example, the INVITE message 485 includes identification information (eg, a From header including SIP address information and/or a tag number) of a host device (eg, the first electronic device 423), a device to be invited (eg, : Includes identification information (eg, To header including SIP address information) of the second electronic device 465) and identification information of a conference call session (eg, Contact header including SIP address information and/or isfocus feature) can do.

In response to receiving the INVITE message 485 , the second electronic device 465 may transmit a SIP-based 200 OK message 487 indicating reception of the INVITE message 485 to the server 405 . Through the above-described procedure of transmitting and receiving the INVITE message 485 and the 200 OK message 487 , the second electronic device 465 may join (eg, add) to the resumed conference call session 463 (eg, add). For example, the second electronic device 465 may join the resumed conference call session 463). In describing various embodiments of the present disclosure, joining (eg, joining) the second electronic device 465 for the resumed conference call session includes the first electronic device 423 , a plurality of It may be described that a conference call session 489 including external electronic devices (eg, UE-A 425 and UE-B 427 ) and a second electronic device 465 is established.

Referring to FIG. 4C , in the process of inviting the second electronic device 465 , the conference call session 463 is held (eg, the multimedia session between the first electronic device 423 and the server 405 is held). Based on this, the voice and/or video call service of the first electronic device 423 may be temporarily suspended for a certain period (“Conference HOLDED”) (eg, from time point 469 to time point 479), and the conference call session ( 463 ) and transmission/reception of SIP-based messages (eg, 467 , 469 , 473 , 475 ) may be required during the hold of the call session 471 .

5 illustrates a conference call session established with a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 of FIG. 4B ) (eg, the conference of FIG. 4B ), according to various embodiments of the present disclosure; It is a signal flow diagram 500 for explaining a method of inviting (eg, adding) the second electronic device 465 to a call session 463 ).

According to various embodiments, the first electronic device 423 includes a first electronic device 423 and a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 ). A conference call session 463 may be established. For example, a conference call setup procedure including the first electronic device 423 and a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 ) (eg, as shown in FIG. 4B ) A first electronic device 423 and a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 of FIG. 4B ) are included based on the procedure of the signal flow diagram 400b) is performed. A conference call session 463 may be established.

According to various embodiments, the first electronic device 423 transmits the text message 501 to the second electronic device 465 via the server 405 or another entity, and Device 465 may receive text message 501 , via server 405 or other entity. For example, the text message 501 may include at least one of a message (eg, RCS chat) or an SMS message based on the RCS protocol, and there is no limitation on the implementation format. According to an embodiment, when the text message 501 is a message based on the RCS protocol, before the text message 501 is transmitted, communication between the first electronic device 423 and the second electronic device 465 based on the RCS protocol At least one procedure for establishing a session (hereinafter, an RCS communication session) may be performed. For example, in response to the first electronic device 423 transmitting an invitation message based on the RCS protocol to the second electronic device 465, and the second electronic device 465 receiving the invitation message based on the RCS protocol, A 200 OK message corresponding to the received invitation message may be transmitted to the first electronic device 423 , and the first electronic device 423 may receive a 200 OK message corresponding to the transmitted invitation message. Through this, an RCS communication session between the first electronic device 423 and the second electronic device 465 may be established, and through the established RCS communication session, a text message 501 based on the RCS protocol and an RCS protocol to be described later A response message 503 based on may be transmitted and/or received. According to an embodiment, when the text message 501 is an SMS message, without establishment of an additional communication session (eg, RCS communication session) between the first electronic device 423 and the second electronic device 465, the SMS-based A text message 501 of , and an SMS-based response message 503 to be described later may be transmitted and/or received.

According to various embodiments, the second electronic device 465 transmits the response message 503 to the first electronic device 423 via the server 405 , and the first electronic device 423 includes the server 405 . At 405 , a response message 503 may be received. For example, the response message 503 may include at least one of a text message or an SMS message based on the RCS protocol. For example, if the response message 503 transmitted by the second electronic device 465 is a text message 501 received by the second electronic device 465 is a text message based on the RCS protocol, the response based on the RCS protocol message, and if the text message 501 received by the second electronic device 465 is an SMS message, it may be an SMS-based text message.

According to various embodiments, the first electronic device 423 transmits the SIP-based REFER message 481 to the server 405 to invite the second electronic device 465 to the conference call session 463 . can For example, the first electronic device 423 may transmit a REFER message 481 based on reception of the response message 503 . Alternatively, the first electronic device 423 may transmit the RFFER message 481 based on information identified from the response message 503 . For example, when the specified text is confirmed from the response message 503 , the first electronic device 423 may transmit the response message 503 , but there is a limit to the trigger for transmission of the REFER message 481 . none.

According to various embodiments, in response to receiving the REFER message 481 , the server 405 sends a 202 Accepted message 483 to the first electronic device 423 and to the conference call session 463 in the second electronic device 463 . The INVITE message 505 for inviting the device 465 may be transmitted to the second electronic device 465 , but there is no limit to the transmission order of the messages 483 and 505 . For example, the INVITE message 505 includes identification information (eg, a From header including SIP address information and/or a tag number) of a host device (eg, the first electronic device 423), and a device to be invited (eg, a From header). : identification information of the second electronic device 465) (eg, To header including SIP address information) and/or identification information of a conference call session (eg, Contact header including SIP address information and/or isfocus feature) may include

According to various embodiments, in response to receiving the INVITE message 505 , the second electronic device 465 sends a SIP-based 200 OK message 507 indicating reception of the INVITE message 505 to the server 405 . can be transmitted A call session 509 between the server 405 and the second electronic device 465 may be established through the above-described procedure for transmitting and receiving the INVITE message 505 and the 200 OK message 507 . Although not shown, in order to establish a call session 509 between the server 405 and the second electronic device 465 , for example, after transmission and reception of the INVITE message 505 , the server 405 and the second electronic device 465 ( 465) may further include a process of transmitting and receiving a SIP-based message (eg, 100 Trying message, 183 Session in progress message, PRACK message, 200 OK (PRACK) message, and/or 180 Ringing message, shown in FIG. 4A ). .

As described above, based on the call session 509 being established while the conference call session 463 is held (e.g., not held), via the call session 509 and the server 405, A voice and/or video call service between the first electronic device 423 , a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 ) and the second electronic device 465 (eg: conference call service) may be provided. In describing various embodiments of the present disclosure, a conference call session 463 including a first electronic device 423 and a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 ) ) is maintained, the call session 509 between the server 405 and the second electronic device 465 being established, the second electronic device 465 being joined to the conference call session 463 and/or The first electronic device 423, a plurality of external electronic devices (eg, UE-A 425 and UE-B (eg, UE-A 425 ) and UE-B ( 427)) and a conference call session including a second electronic device 465 is established (eg, “Conference (first electronic device, UE-A, UE-B & second electronic device)”) can

Although not shown, the server 405 may transmit a NOTIFY message (eg, NOTIFY request) to the first electronic device 423 after transmitting the 202 Accepted message 483 to the first electronic device 423 . have. For example, the NOTIFY message may include information on the progress of processing based on the accepted REFER message 481 (eg, identification information on a device to be invited (eg, the second electronic device 465 )). . Alternatively, the server 405 may transmit a NOTIFY message (eg, NOTIFY request) to the first electronic device 423 after the 202 OK message 507 is received from the second electronic device 465 . For example, the NOTIFY message may include information on the progress of processing based on the accepted REFER message 481 (eg, identification information on the invited device (eg, the second electronic device 465 )). . The first electronic device 423 may receive the NOTIFY message and transmit a 200 OK message indicating that the NOTIFY message has been received to the server 405 .

Referring to FIG. 5 , in the process of inviting the second electronic device 465 , a voice and/or video call service (eg, a conference call service) of the first electronic device 423 may be maintained (eg, a conference call service). , may not be held) (eg, "Conference (first electronic device, UE-A & UE-B)"), an invitation procedure of the second electronic device 465 according to a comparative example (eg, shown in FIG. 4C ) The number of SIP-based messages required for transmission and reception may be relatively small compared to the procedure of the signal flow diagram 400c).

6A illustrates an invitation to a second electronic device (eg, the second electronic device 465 of FIG. 5 ) to an established conference call session (eg, the conference call session 463 of FIG. 4B ) according to various embodiments of the present disclosure; It is a flowchart 600a for explaining the operation of the first electronic device (eg, the first electronic device 423 of FIG. 5 ) in the process of (eg, adding). Hereinafter, it will be described with reference to FIG.

According to various embodiments, in operation 610a, the first electronic device 423 performs a conference call with a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 of FIG. 4B ). A session 463 may be established.

According to various embodiments, in operation 630a , the first electronic device 423 may transmit the text message 501 to the second electronic device 465 while the established conference call session 463 is maintained. . For example, the first electronic device 423 does not hold the established conference call session 463 and sends the text message 501 to the second through the IMS server (eg, the server 405 of FIG. 5 ). may be transmitted to the electronic device 465 . According to various embodiments, the first electronic device 423 connects the second electronic device 465 through various input interfaces (eg, the input module 150 and/or the display module 160 of FIG. 1 ). A user's input for invitation may be received, and it will be described in more detail with reference to the drawings to be described later.

According to various embodiments, the first electronic device 423 may receive a response message 503 to the text message 501 from the second electronic device 465 in operation 650a. For example, while the established conference call session 463 is maintained, the first electronic device 423 sends a response message 503 to the second electronic device ( 465) can be received.

According to various embodiments, in operation 670a , in response to receiving the response message 503 , the first electronic device 423 invites the second electronic device 465 to the established conference call session 463 . The requesting REFER message 481 may be transmitted to the IMS server (eg, the server 405 ). According to various embodiments, the first electronic device 423 transmits the REFER message 481 to the IMS based on whether the invitation of the second electronic device 465 is accepted and/or the time when the response message 503 is received. It can be transmitted to a server (eg, the server 405), and will be described in more detail with reference to the drawings to be described later.

Based on the above-described operations, while the voice and/or video call service (eg, conference call service) of the first electronic device 423 is maintained, the second electronic device ( 465) may be invited and/or participated.

6B illustrates an invitation to a second electronic device (eg, the second electronic device 465 of FIG. 5 ) to an established conference call session (eg, the conference call session 463 of FIG. 4B ) according to various embodiments of the present disclosure; It is a flowchart 600b for explaining the operation of the second electronic device 465 in the (eg, adding) process. Hereinafter, it will be described with reference to FIG.

According to various embodiments, in operation 610b , the second electronic device 465 performs the first electronic device (eg, the first electronic device 423 of FIG. 5 ) and a plurality of external electronic devices (eg, FIG. 4B ). A text message 501 may be received from the first electronic device 423 while the conference call session 463 established between the UE-A 425 and the UE-B 427 is maintained.

According to various embodiments, in operation 630b , the second electronic device 465 transmits a first response message to the text message 501 (eg, the response message 503 of FIG. 5 ) to the first electronic device 423 . ) can be transmitted. According to various embodiments, the second electronic device 465 is the first electronic device 423 through various input interfaces (eg, the input module 150 and/or the display module 160 of FIG. 1 ). It is possible to receive a user's input as to whether to accept the invitation, and it will be described in more detail with reference to the drawings to be described later.

According to various embodiments, in operation 650b , the second electronic device 465 invites the established conference call session 463 in response to transmitting the first response message (eg, the response message 503 ). For example, an invitation message (eg, the INVITE message 505 of FIG. 5 ) may be received from the IMS server (eg, the server 405 of FIG. 5 ).

According to various embodiments, in operation 670b , the second electronic device 465 performs a second response message (eg, the 200 OK message 507 of FIG. 5 ) corresponding to the invitation message (eg, the INVITE message 505 ). ) to the IMS server (eg, the server 405). According to various embodiments, based on the second electronic device 465 transmitting the second response message (eg, 200 OK message 507 ), the second electronic device 465 is connected to the conference call session 463 . can be subscribed

Based on the above-described operations, while the voice and/or video call service (eg, conference call service) of the first electronic device 423 is maintained, the second electronic device ( 465) may be invited and/or participated.

6C illustrates inviting a second electronic device (eg, the second electronic device 465 of FIG. 5 ) to an established conference call session (eg, the conference call session 463 of FIG. 4B ) according to various embodiments of the present disclosure In the process of (eg, adding), it is a flowchart 600c for explaining the operation of a server (eg, the server 405 of FIG. 5 ). Hereinafter, it will be described with reference to FIG.

According to various embodiments, the server 405, in operation 610c, a first electronic device (eg, the first electronic device 423 of FIG. 5 ) and a plurality of external electronic devices (eg, UE- of FIG. 4B ) While the conference call session 463 established between the A 425 and the UE-B 427 is maintained, a REFER message (eg, the REFER message 481 of FIG. 5 ) is received from the first electronic device 423 ). can do.

According to various embodiments, the server 405 , in operation 630c , in response to receiving the REFER message 481 , invites the second electronic device 465 to the established conference call session 463 , the server A call session 509 may be established between the 405 and the second electronic device 465 . For example, the server 405 receives the REFER message 481 and receives the REFER message 481 in a state where the call session 509 between the server 405 and the second electronic device 465 is not established. In order to establish a call session 509 between the server 405 and the second electronic device 465 based on Transmission and a response message (eg, 200 OK message 507 of FIG. 5 ) may be received from the second electronic device 465 . According to various embodiments, based on the call session 509 being established while the conference call session 463 is maintained (eg, not held), the second electronic device 465 initiates the conference call session. The second electronic device 465 may be invited and/or joined to 463 .

Based on the above-described operations, while the voice and/or video call service (eg, conference call service) of the first electronic device 423 is maintained, the second electronic device ( 465) may be invited and/or participated.

7 illustrates a time point when a response message (eg, the response message 503 of FIG. 5 ) is received by the first electronic device (eg, the first electronic device 423 of FIG. 5 ), according to various embodiments of the present disclosure; Based on this, it is a flowchart 700 for explaining a method of transmitting a REFER message (eg, the REFER message 481 of FIG. 5 ).

According to various embodiments, in operation 710 , the first electronic device 423 performs a text message (eg, FIG. 5 ) while an established conference call session (eg, the conference call session 463 of FIG. 4B ) is maintained. text message 501 of ) to the second electronic device (eg, the second electronic device 465 of FIG. 5 ).

According to various embodiments, in operation 730 , the first electronic device 423 transmits the response message 503 to the text message 501 within a predetermined time (eg, an expiration timeout). You can check whether it is received or not. For example, the first electronic device 423 may check whether a response message 503 is received within a predetermined time (eg, 30 seconds) after transmitting the text message 501 .

According to various embodiments, when it is confirmed that the response message 503 is received within a predetermined time, in operation 750 , the first electronic device 423 transmits the REFER message 481 to the IMS server (eg, as shown in FIG. 5 ). server 405). According to an embodiment, the response message 503 may include information on whether to accept the invitation from the second electronic device 465 . For example, if the first electronic device 423 determines that the response message 503 includes information regarding the rejection of the invitation from the second electronic device 465 , the response message 503 is received within a predetermined time Even if it is confirmed that the REFER message 481 is not transmitted to the IMS server (eg, the server 405). For example, if it is confirmed that the response message 503 includes information on accepting the invitation of the second electronic device 465 or does not include information on rejecting the invitation, the first electronic device 423 responds Based on the message 503 being received within a predetermined time, the REFER message 481 may be transmitted to the IMS server (eg, the server 405 ). According to various embodiments, after the first electronic device 423 transmits the REFER message 481 to the IMS server (eg, the server 405 ), the 202 Accepted messages 483 to 200 described in FIG. 5 . A procedure of transmitting and receiving the OK message 507 is performed, the first electronic device 423, a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 of FIG. 4B ) and a second electronic device A conference call session 509 between the devices 465 may be established (eg, invited and/or joined by the second electronic device 465 ).

According to various embodiments, if it is not confirmed that the response message 503 is received within a predetermined time, in operation 770 , the first electronic device 423 transmits the REFER message 481 to the IMS server (eg, the server ( 405)) may not be transmitted. For example, the first electronic device 423 transmits the REFER message 481 to the IMS server (eg, server ( 405)) may not be transmitted. According to an embodiment, if it is not confirmed that the response message 503 is received within a predetermined time, the first electronic device 423 performs operation 710 again to transmit the text message 501 to the second electronic device 465 . ), and after retransmitting the text message 501, if a response message 503 is received within a predetermined time (eg, 30 seconds), the REFER message 481 is transmitted to the IMS server (eg, server 405). may be

8 is a diagram of a first electronic device (eg, the first electronic device 423 of FIG. 5 ) and a second electronic device (eg, the second electronic device 465 of FIG. 5 ) according to various embodiments of the present disclosure It is a flowchart 800 for explaining a method of transmitting a REFER message (eg, the REFER message 481 of FIG. 5 ) based on whether the invitation is accepted.

According to various embodiments, in operation 810 , the first electronic device 423 performs a text message (eg, FIG. 5 ) while an established conference call session (eg, the conference call session 463 of FIG. 4B ) is maintained. text message 501 of ) to the second electronic device (eg, the second electronic device 465 of FIG. 5 ).

According to various embodiments, in operation 830 , the first electronic device 423 may identify information indicating rejection of the second electronic device 465 for the established conference call session 463 . For example, in the first electronic device 423 , the response message 503 includes a specified string and/or a message (eg, a response message) including information regarding rejection of the invitation by the second electronic device 465 . When 503 or another text message based on the RCS protocol or SMS received from the second electronic device 465 is received, information indicating rejection of the second electronic device 465 may be checked, which will be described later. to be described in more detail.

According to various embodiments, in operation 850 , the first electronic device 423 may not transmit the REFER message 481 to the IMS server (eg, the server 405 of FIG. 5 ). For example, when information indicating rejection of the second electronic device 465 for the established conference call session 463 is checked, the first electronic device 423 transmits the REFER message 481 to the IMS server (eg: server 405).

9A illustrates a method for inviting a second electronic device 465 through a touch screen 901 (eg, the display module 160 of FIG. 1 ) of the first electronic device 423 according to various embodiments of the present disclosure; It is a diagram for explaining a method of receiving a user's input.

Referring to FIG. 9A , in a state in which a conference call service between a plurality of users is provided (eg, a state in which a conference call session is established between a plurality of electronic devices (eg, UEs)), a first electronic device ( An example of a screen displayed on the touch screen 901 of 423 is shown.

According to various embodiments, information related to an ongoing conference call service and/or a function related to an ongoing conference call service may be provided through a screen displayed on the touch screen 901 . For example, information related to an ongoing conference call service may include the number 903 (eg, "AAA") of users (hereinafter, participants) participating in the conference call service (eg, conference call session 463 of FIG. 4B ). and 2 people"), information 905 indicating that the audio and/or video call service in progress is a conference call service (eg "group call"), and/or the time the conference call service was conducted (907) (eg " 00:10"). For example, "AAA" of reference numeral 903 may indicate identification information (eg, the user name of the device stored in the phone book, stored in the phone book) of the device first invited to a conference call service (eg, a conference call session). have. For example, information related to an ongoing conference call service may include an object 909 (eg, an image and/or text) representing a host device (eg, the first electronic device 423 ) and/or invited devices (eg, an image and/or text). Example: may include objects 911a and 911b (eg, images and/or text) representing UE-A 425 and UE-B 427 of FIG. 4B . As an example, "AAA" and "BBB" of reference numerals 911a and 911b are identification information (eg, phone book) of invited devices (eg, UE-A 425 and UE-B 427 in FIG. 4B ). stored in the user names of UE-A 425 and UE-B 427).

According to various embodiments, a function of adding (eg, inviting) a new participant to an ongoing conference call service may be provided through a screen displayed on the touch screen 901 . In more detail, the first electronic device 423 may receive a user input of touching the participant addition icon 913 through the touch screen 901 . When a user input of touching the participant addition icon 913 is received, the first electronic device 423 may, for example, display an execution screen (eg, a contact application) (eg, a phonebook application). a device to which an external electronic device corresponding to the selected contact is invited (eg, FIG. 5) of the second electronic device 465). As another example, when a user input of touching the participant addition icon 913 is received, the first electronic device 423 displays a user interface for inputting a phone number of a device to be invited, and displays the user input through the displayed user interface. An external electronic device corresponding to the phone number may be determined as a device to be invited (eg, the second electronic device 465 ). When the device to be invited (eg, the second electronic device 465) is determined, the first electronic device 423 sends a text message (eg, to the device to be invited (eg, the second electronic device 465)) (eg, as shown in FIG. 5 ). By transmitting the text message 501), it is possible to check whether the invitation of the device to be invited (eg, the second electronic device 465) has been accepted.

FIG. 9B illustrates an invitation to the first electronic device 423 through the touch screen 915 of the second electronic device 465 (eg, the display module 160 of FIG. 1 ), according to various embodiments of the present disclosure. It is a diagram for explaining a method of receiving a user's input as to whether or not to accept.

Referring to FIG. 9B , for an invitation of the second electronic device 462 to a conference call session (eg, the conference call session 463 of FIG. 4B ), a text message (eg, FIG. 4B ) When the text message 501 of 5) is received, an example of a screen displayed on the touch screen 915 of the first electronic device 423 is illustrated.

According to various embodiments, a user for notifying the first electronic device 423 of whether to accept an invitation to a conference call service (eg, whether to participate) through a screen displayed on the touch screen 915 . An interface 917 may be displayed.

According to various embodiments, the user interface 917 inputs information 919a about the received text message 501 (eg, a text message based on the RCS protocol), accept the invitation to the conference call session 463 . It may include a first object 919b for receiving and/or a second object 919c for receiving an invitation rejection for the conference call session 463 . For example, information 919a regarding the received text message 501 (eg, a text message based on the RCS protocol) may include an invitation to a conference call session 463 (eg, a text message 501 based on the RCS protocol). ) of the device (eg, the host device) (eg, the first electronic device 423) (eg, phone number) (eg, phone number) of the device (eg, the host device 423) and/or the corresponding text message ( 501 ) may include information indicating that the message inquires whether to accept the invitation to the conference call session 463 ("You have been invited to the conference call. Would you like to join?").

According to various embodiments, when a user input of touching the first object 919b is received, the second electronic device 465 transmits a response message 503 to the received text message 501 to the first electronic device It can be sent to (423). For example, the response message 503 transmitted when the first object 919b is selected may include information indicating acceptance of the invitation by the second electronic device 465 . According to an embodiment, after receiving the text message 501 from the first electronic device 423 , the second electronic device 465 receives the first object (eg, expiration timeout) within a predetermined time (eg, expiration timeout). If 919b) is not selected, a notification may be displayed indicating that the time for accepting the invitation has elapsed. For example, information about a predetermined time (eg, expiration timeout) may be included in the text message 501 , and the second electronic device 465 may display the predetermined information included in the text message 501 . You can check information about time (eg, expiration timeout). According to an embodiment, after receiving the text message 501 from the first electronic device 423 , the second electronic device 465 receives the first object (eg, expiration timeout) within a predetermined time (eg, expiration timeout). 919b) is selected, a response message 503 in response to the received text message 501 may be transmitted to the first electronic device 423 .

According to various embodiments, when a user input of touching the second object 919c is received, the second electronic device 465 transmits a response message 503 to the received text message 501 to the first electronic device It is not transmitted to 423 , or a response message 503 including information indicating rejection of the invitation of the second electronic device 465 may be transmitted to the first electronic device 423 .

FIG. 9C illustrates that a second electronic device (eg, the second electronic device 465 of FIG. 5 ) accepts an invitation to a conference call session (eg, the conference call session 463 of FIG. 4B ), according to various embodiments of the present disclosure; If not, it is a diagram for explaining a screen displayed through the display 921 (eg, the display module 160 of FIG. 1 ) of the first electronic device 423 .

According to various embodiments, the first electronic device 423 transmits a text message (eg, the text message 501 of FIG. 5 ) to the second electronic device 465 , and then the second electronic device 465 . When a message including information regarding invitation rejection of The user interface 923 (eg, a pop-up notification) indicating the rejection of the invitation of the electronic device 465 is displayed, and a REFER message (eg, the REFER message 481 of FIG. 5 ) is transmitted to the IMS server (eg: It may not be transmitted to the server 405 of FIG. 5). According to various embodiments, the user interface 923 may include identification information (“010-XXXX-XXXX”) (eg, phone number) of the device (eg, the second electronic device 465) that has rejected the invitation and/or Alternatively, information indicating that the device (eg, the second electronic device 465 ) that has received the text message 501 has rejected the invitation (“conference call invitation has been rejected”) may be included.

9D illustrates an invitation to a conference call session (eg, conference call session 463 of FIG. 4B ) by a second electronic device (eg, second electronic device 465 of FIG. 5 ) according to various embodiments. A diagram for explaining a screen displayed through the touch screen 901 (eg, the display module 160 of FIG. 1 ) of the first electronic device 423 when there is no response.

According to various embodiments, after transmitting a text message (eg, the text message 501 of FIG. 5 ) to the second electronic device 465 , the first electronic device 423 transmits a predetermined time (eg, . ) (e.g. pop-up notifications).

According to various embodiments, the user interface 925 may include identification information (“010-XXXX-XXXX”) (eg, phone number) of the device that has not responded to the invitation (eg, the second electronic device 465) and / or information indicating that the device (eg, the second electronic device 465 ) that has received the text message 501 did not respond to the invitation (“You did not respond to the conference call invitation”) may be included.

According to various embodiments, the user interface 925 may provide a first object 927b for re-invite of the second electronic device 465 that has not responded to the invitation and a first object 927b for terminating the invitation procedure. 2 objects 927c may be included. According to various embodiments, when a user input of touching the first object 927b is received, the first electronic device 423 retransmits the text message 501 to the second electronic device 465 , and the text message After retransmitting 501 , it may be checked whether a response message 503 is received within a predetermined time. According to various embodiments, when a user input of touching the second object 927c is received, the first electronic device 423 may end the invitation procedure of the second electronic device 465 that has not responded to the invitation. have.

10A illustrates a REFER message (eg, FIG. 10A ) based on a character string included in a response message 503 by a first electronic device (eg, the first electronic device 423 of FIG. 5 ) according to various embodiments of the present disclosure; 5 is a flowchart 1000a for explaining a method of determining whether to transmit the REFER message 481). 10B illustrates whether the second electronic device (eg, the second electronic device 465 of FIG. 5 ) accepts an invitation to the first electronic device 423 through a response message 503 according to various embodiments of the present disclosure; It is a diagram for explaining a method of informing (inform). Hereinafter, it will be described with reference to FIGS. 10A and 10B together.

Referring to FIG. 10A , according to various embodiments, in operation 1010a, the first electronic device 423 maintains an established conference call session (eg, the conference call session 463 of FIG. 4B ). A message (eg, the text message 501 of FIG. 5 ) may be transmitted to the second electronic device 465 . For example, the text message 501 may include an SMS-based text message. If the first electronic device 423 and/or the second electronic device 465 does not support a function of transmitting and receiving a text message based on the RCS protocol, the first electronic device 423 transmits the SMS-based text message 501 When sending a request to the second electronic device 465 to transmit a response message (eg, the response message 503 in FIG. 5 ), the response message 503 to be transmitted includes a specified character string, so that the second electronic device ( When the response message 503 is received from 465 , it can be identified that the received response message 503 is a response to the text message 501 for inviting the second electronic device 465 to the conference call session 463 . have. Referring also to FIG. 10B , when the SMS-based text message 501 is received, the second electronic device 465 displays the content 1001 of the received text message 501 on the touch screen 915 . ) can be displayed. For example, the displayed content 1001 includes information 1003a about a received text message 501 (eg, an SMS-based text message) and information on a method of responding to an invitation from the first electronic device 423 . (1003b) and/or information 1003c regarding matters to be noted when responding may be included. The second electronic device 465 receives at least one predefined character (eg, “A” or “B”) through the user interface 1005 for text input, and receives the input at least one predefined character (eg, “A” or “B”). : A response message 503 (eg, an SMS-based response message) including “A” or “B”) may be transmitted to the first electronic device 423 , and through this, the first electronic device 423 is invited You can indicate whether you accept it or not. According to an embodiment, even if the first electronic device 423 and the second electronic device 465 support the function of transmitting and receiving a text message based on the RCS protocol, the second electronic device 465 may use the method described with reference to FIG. 10B . Accordingly, the SMS-based response message 503 including at least one predetermined text may be transmitted. According to another embodiment, according to the method described with reference to FIG. 10B , the second electronic device 465 includes at least one predefined character in the response message 503 based on the RCS protocol, so as to include at least one predefined character. It may transmit a response message 503 based on the RCS protocol including

According to various embodiments, the first electronic device 423 may receive a response message 503 to the text message 501 from the second electronic device 465 in operation 1030a.

According to various embodiments, the first electronic device 423 may identify a character string included in the response message 503 in operation 1050a.

According to various embodiments, in operation 1070a, the first electronic device 423 may determine whether the checked character string includes at least one predetermined character. According to various embodiments, the at least one predefined letter is at least one letter for indicating invitation acceptance, and may include, for example, “A” when referring to FIG. 10B together.

According to various embodiments, when it is determined that the checked character string includes at least one predetermined character, the first electronic device 423 transmits the REFER message 481 to the IMS server (eg, in operation 1090a) (eg, as shown in FIG. 5 ). server 405).

According to various embodiments, the first electronic device 423 transmits the REFER message 481 to the IMS server (eg, the server 405) when it is determined that the checked character string does not include at least one predetermined character. may not transmit. According to an embodiment, when it is confirmed that the checked character string includes at least one predefined character (eg, “B” in FIG. 10B ) for indicating invitation rejection, the first electronic device 423 , a REFER message (481) may not be sent to the IMS server (eg, server 405).

11A illustrates a first electronic device (eg, the first electronic device 423 of FIG. 5 ) from a second electronic device (eg, the second electronic device 465 of FIG. 5 ), according to various embodiments of the present disclosure; A flowchart 1100a for explaining a method of determining whether to transmit a REFER message (eg, the REFER message 481 of FIG. 5 ) based on the time when the response message (eg, the response message 503 of FIG. 5 ) is received )to be. 11B illustrates a case in which the second electronic device 465 transmits a response message 503 while a conference call session (eg, the conference call session 463 of FIG. 4B ) is not maintained, according to various embodiments of the present disclosure. An example of a screen displayed on the second electronic device 465 is illustrated.

Referring to FIG. 11A , according to various embodiments, in operation 1110a, the first electronic device 423 performs a text message (eg, the text message of FIG. 5 ) while an established conference call session 463 is maintained. 501)) to the second electronic device 465 .

According to various embodiments, the first electronic device 423 may receive a response message 503 to the text message 501 from the second electronic device 465 in operation 1130a.

According to various embodiments, the first electronic device 423 may check whether the conference call session 463 is maintained in operation 1150a. For example, when receiving the response message 503 , the first electronic device 423 may check whether an established conference call session 463 is maintained.

According to various embodiments, if it is determined that the conference call session 463 is maintained, the first electronic device 423 sends a REFER message 481 to the IMS server (eg, the server 405 of FIG. 5 ) in operation 1170a. )) can be transmitted. According to various embodiments, after the first electronic device 423 transmits the REFER message 481 to the IMS server (eg, the server 405 ), the 202 Accepted messages 483 to 200 described in FIG. 5 . A procedure of transmitting and receiving the OK message 507 is performed, the first electronic device 423, a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 of FIG. 4B ) and a second electronic device A conference call session 509 between the devices 465 may be established (eg, invited and/or joined by the second electronic device 465 ).

According to various embodiments, if it is determined that the conference call session 463 is not maintained, the first electronic device 423 may transmit information indicating the end of the conference call session 463 in operation 1190a. For example, the first electronic device 423 may transmit information indicating the end of the conference call session 463 to the second electronic device 465 through an IMS server (eg, the server 405 ). According to various embodiments, the second electronic device 465 receives information indicating the end of the conference call session 463 and displays, for example, the screen shown in FIG. 11B on the touch screen 915 . can do. Referring to FIG. 11B , the second electronic device 465 may display the user interface 1101 indicating that the conference call session 463 to which the second electronic device 465 responded to accept the invitation has already ended. For example, the user interface 1101 may display information indicating that the conference call session 463 to which the second electronic device 465 responded to accept the invitation has already ended (“The answered conference call has already ended.”) may include

According to various embodiments, the first electronic device (eg, the first electronic device 423 of FIG. 5 ) may include at least one processor (eg, the processor 120 of FIG. 1 , FIGS. 2A and/or 2B ). a first communication processor 212 and/or a first communication processor 214 of FIGS. 2A and/or 2B ), wherein the at least one processor is configured to configure an IMS server (eg, server 405 of FIG. 5 ). through, establish a conference call session (eg, conference call session 463 of FIG. 4B ) with a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 of FIG. 4B ). ), and while the established conference call session is maintained, a text message (eg, the text message 501 of FIG. 5 ) is transmitted to a second electronic device (eg, the second electronic device 465 of FIG. 5 ); Receives a response message to the text message (eg, the response message 503 of FIG. 5 ) from the second electronic device, and in response to receiving the response message, invites the second electronic device to the established conference call session It may be configured to transmit a REFER message (eg, the REFER message 481 of FIG. 4C ) to the IMS server.

According to various embodiments, the text message may include at least one of a message based on an RCS protocol and an SMS message.

According to various embodiments, the at least one processor performs at least one procedure for establishing a communication session between the first electronic device and the second electronic device based on the RCS protocol, and establishes communication based on the RCS protocol. In response to transmitting the text message to the second electronic device through the session and receiving the response message through the communication session established based on the RCS protocol, it may be configured to transmit the REFER message to the IMS server.

According to various embodiments, the at least one procedure of establishing a communication session based on the RCS protocol includes a first procedure of transmitting an invitation message based on the RCS protocol to the second electronic device through the IMS server, and the IMS server. and a second procedure of receiving a 200 OK message corresponding to the invitation message based on the RCS protocol.

According to various embodiments, the at least one processor is, in response to identifying a character string included in the received response message, and confirming that the verified character string includes at least one predefined character, a REFER message can be set to transmit to the IMS server.

According to various embodiments, after transmitting the text message to the second electronic device, the at least one processor checks whether a response message is received within a predetermined time (eg, expiration timeout), and the response message is transmitted in advance. It may be configured to transmit a REFER message to the IMS server based on confirming that it is received within a specified time.

According to various embodiments, the at least one processor may be further configured not to transmit the REFER message based on confirming that the response message is not received within a predetermined time.

According to various embodiments, the first electronic device further includes a display (eg, the display module 160 of FIG. 1 ), and the at least one processor rejects the second electronic device for the established conference call session. If the information indicating (indicating) is confirmed, it may be further configured to display a user interface indicating rejection on the display and not to transmit a REFER message.

According to various embodiments, the at least one processor determines whether an established conference call session is maintained, based on receiving the response message, and sends a REFER message based on confirming that the established conference call session is maintained. It can be set to transmit to the IMS server.

According to various embodiments, the at least one processor is configured to transmit information indicating termination of the conference call session to the second electronic device without transmitting a REFER message based on confirming that the established conference call session is not maintained. More can be set.

According to various embodiments, a call session between the IMS server and the second electronic device may be established based at least in part on the transmitted REFER message.

According to various embodiments, the second electronic device (eg, the second electronic device 465 of FIG. 5 ) may include at least one processor (eg, the processor 120 of FIG. 1 , FIGS. 2A and/or 2B ). a first communication processor 212 and/or a first communication processor 214 of FIGS. 2A and/or 2B ), wherein the at least one processor includes a first electronic device (eg, the first electronic device of FIG. 5 ). 423) and a plurality of external electronic devices (eg, UE-A 425 and UE-B 427 of FIG. 4B ) established conference call session (eg, conference call session 463 of FIG. 4B )) While this is maintained, a text message (eg, the text message 501 of FIG. 5 ) is received from the first electronic device, and a first response message to the text message (eg, the response message 503 of FIG. 5 ) is generated. In response to transmitting the first electronic device and transmitting the first response message, an invitation message for inviting the second electronic device to the established conference call session (eg, INVITE message 505 in FIG. 5 ) is transmitted to the IMS. Received from the server (eg, server 405 in FIG. 5 ), and based on receiving the invitation message, a second response message (eg, 200 OK message 507 in FIG. 5 ) corresponding to the invitation message is sent to the IMS server Based on the configured to transmit and transmitting the second response message, the second electronic device may join the established conference call session.

According to various embodiments, the at least one processor performs at least one procedure for establishing a communication session between the first electronic device and the second electronic device based on the RCS protocol, and establishes communication based on the RCS protocol. In response to receiving the text message through the session and transmitting the first response message through the communication session established based on the RCS protocol, it may be configured to receive the invitation message from the IMS server.

According to various embodiments, the at least one processor may be configured to receive the invitation message from the IMS server in response to transmitting the first response message including the character string composed of at least one predetermined character.

According to various embodiments, the text message includes information on a predetermined time during which the first response message can be transmitted, and the at least one processor, in response to transmitting the first response message within the predetermined time, includes an invitation message may be set to receive from the IMS server.

According to various embodiments, the second electronic device further includes a display (eg, the display module 160 of FIG. 1 ), and the at least one processor is configured on the display based on receiving the text message. Display a user interface inquiring whether to accept the conference call session, and when an input indicating acceptance of the established conference call session is received through the displayed user interface, it may be configured to transmit a first response message. have.

According to various embodiments, the at least one processor may be configured to transmit, through the displayed user interface, information indicating rejection to the first electronic device when an input indicating rejection of the established conference call session is received. .

According to various embodiments, a call session between the IMS server and the second electronic device may be established based on transmitting the second response message.

According to various embodiments, a server (eg, server 405 of FIG. 5 ) may include at least one processor (eg, processor 120 of FIG. 1 , first communication processor 212 of FIGS. 2A and/or 2B ), according to various embodiments. ) and/or a first communication processor 214 of FIGS. 2A and/or 2B ), wherein the at least one processor includes a first electronic device (eg, the first electronic device 423 of FIG. 5 ) and a plurality of While the conference call session established between the external electronic devices (eg, UE-A 425 and UE-B 427 of FIG. 4B ) (eg, the conference call session 463 of FIG. 4B ) is maintained, the first A REFER message (eg, the REFER message 481 of FIG. 4C ) is received from the first electronic device, and the REFER message includes identification information of a second electronic device (eg, the second electronic device 465 of FIG. 5 ) , in response to receiving the REFER message, establishes a call session (eg, call session 509 of FIG. 5 ) between the server and the second electronic device to invite the second electronic device to the established conference call session can be set to

According to various embodiments, the at least one processor may be further configured to receive a REFER message while a call session between the server and the second electronic device is not established.

The various embodiments of this document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, but it should be understood to 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 of the item, 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 of which 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 an element from other elements in question, and may refer elements to other aspects (e.g., importance or order) is not limited. It is said 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 connected to the other component directly (eg by wire), wirelessly, or through a third component.

The term “module” used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and is interchangeable with terms such as, for example, logic, logic block, component, or circuit. can be used as A module may be an integrally formed part or a minimum unit or a part of the part 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).

Various embodiments of the present document include one or more instructions stored in a storage medium (eg, internal memory 136 or external memory 138) readable by a machine (eg, electronic device 101). may be implemented as software (eg, the program 140) including For example, the processor (eg, the processor 120 ) of the device (eg, the electronic device 101 ) may call at least one of the one or more instructions stored from the storage medium and execute it. This makes it possible for the device to be operated to perform at least one function according to the called at least one command. 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 one embodiment, the method according to various embodiments disclosed in this document may be provided in a computer program product (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 machine-readable storage medium (eg compact disc read only memory (CD-ROM)), or via an application store (eg Play Store ^TM ) or on two user devices ( It can be distributed (eg downloaded or uploaded) directly, online between smartphones (eg: smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created 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 various embodiments, each component (eg, a module or a program) of the above-described components may include a singular or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. have. According to various 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 the integration. . According to various 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, or omitted. , or one or more other operations may be added.

101: electronic device
405: server
423: first electronic device
465: second electronic device

Claims (20)

In the first electronic device,
at least one processor, the at least one processor comprising:
Establishing a conference call session with a plurality of external electronic devices through the IMS server,
while the established conference call session is maintained, sending a text message to the second electronic device;
receiving a response message to the text message from the second electronic device;
a first electronic device configured to transmit, to the IMS server, a REFER message requesting to invite the second electronic device to the established conference call session, in response to receiving the response message. According to claim 1,
The text message is
A first electronic device including at least one of a message based on an RCS protocol and an SMS message. The method of claim 1,
The at least one processor,
performing at least one procedure for establishing a communication session between the first electronic device and the second electronic device based on the RCS protocol;
transmitting the text message to the second electronic device through a communication session established based on the RCS protocol;
A first electronic device configured to transmit the REFER message to the IMS server in response to receiving the response message through a communication session established based on the RCS protocol. 4. The method of claim 3,
At least one procedure for establishing a communication session based on the RCS protocol,
a first procedure of transmitting an invitation message based on the RCS protocol to the second electronic device through the IMS server; and
and a second procedure of receiving a 200 OK message corresponding to the invitation message based on the RCS protocol through the IMS server. The method of claim 1,
the at least one processor,
Check the character string included in the received response message,
a first electronic device configured to transmit the REFER message to the IMS server in response to confirming that the checked character string includes at least one predetermined character. According to claim 1,
the at least one processor,
After transmitting the text message to the second electronic device, it is checked whether the response message is received within a predetermined time,
The first electronic device configured to transmit the REFER message to the IMS server based on confirming that the response message is received within the predetermined time. 7. The method of claim 6,
the at least one processor,
The first electronic device further configured not to transmit the REFER message based on confirming that the response message is not received within the predetermined time. The method of claim 1,
further comprising a display,
The at least one processor,
When information indicating rejection of the second electronic device for the established conference call session is confirmed, a first user interface indicating the rejection is displayed on the display, and the first set further not to transmit the REFER message electronic device. According to claim 1,
the at least one processor,
Based on receiving the response message, check whether the established conference call session is maintained,
a first electronic device configured to transmit the REFER message to the IMS server based on confirming that the established conference call session is maintained. 10. The method of claim 9,
the at least one processor,
The first electronic device further configured to transmit information indicating termination of the conference call session to the second electronic device without transmitting the REFER message based on confirming that the established conference call session is not maintained. The method of claim 1,
A first electronic device for establishing a call session between the IMS server and the second electronic device based at least in part on the transmitted REFER message. In the second electronic device,
at least one processor, the at least one processor comprising:
Receive a text message from the first electronic device while the conference call session established between the first electronic device and the plurality of external electronic devices is maintained,
transmitting a first response message to the text message to the first electronic device;
In response to transmitting the first response message, receiving an invitation message for inviting the second electronic device to the established conference call session from the IMS server,
based on receiving the invitation message, configured to transmit a second response message corresponding to the invitation message to the IMS server;
Based on transmitting the second response message, the second electronic device joins the established conference call session. 13. The method of claim 12,
the at least one processor,
performing at least one procedure for establishing a communication session between the first electronic device and the second electronic device based on the RCS protocol;
receiving the text message through a communication session established based on the RCS protocol;
A second electronic device configured to receive the invitation message from the IMS server in response to transmitting the first response message through the communication session established based on the RCS protocol. 13. The method of claim 12,
the at least one processor,
A second electronic device configured to receive the invitation message from the IMS server in response to transmitting the first response message including a character string composed of at least one predetermined character. 13. The method of claim 12,
The text message is
Including information on a predetermined time for transmitting the first response message,
the at least one processor,
A second electronic device configured to receive the invitation message from the IMS server in response to transmitting the first response message within the predetermined time. 13. The method of claim 12,
further comprising a display,
the at least one processor,
displaying a user interface inquiring whether to accept the established conference call session on the display based on receiving the text message,
a second electronic device configured to transmit the first response message when an input indicating acceptance of the established conference call session is received through the displayed user interface. 17. The method of claim 16,
the at least one processor,
a second electronic device configured to transmit information indicating rejection to the first electronic device when an input indicating rejection of the established conference call session is received through the displayed user interface. 13. The method of claim 12,
A second electronic device establishing a call session between the IMS server and the second electronic device based on transmitting the second response message. in the server,
at least one processor, the at least one processor comprising:
Receive a REFER message from the first electronic device while the conference call session established between the first electronic device and the plurality of external electronic devices is maintained, wherein the REFER message includes identification information of a second electronic device;
a server configured to establish a call session between the server and the second electronic device, in response to receiving the REFER message, to invite the second electronic device to the established conference call session. 20. The method of claim 19,
the at least one processor,
A server further configured to receive the REFER message while a call session between the server and the second electronic device is not established.

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