Samsung Electronics Co., Ltd.

Injae Song

Soomin Lee

Dongho Kim

Kirak Bae

Various embodiments of the disclosure relate to an apparatus and method for providing a call function in an electronic device. The electronic device includes first communication circuitry, second communication circuitry, and a processor. The processor registers with a network using NR communication through the first communication circuitry, identifies whether a call connection using a network using the wireless LAN communication is possible, based on determination that establishment of a communication link related to a call connection with an external electronic device using the network using the NR communication and/or a network using LTE communication fails, and connects a call with the external electronic device over the network using the wireless LAN communication, based on determination that the call connection using the network using the wireless LAN communication is possible. Other embodiments may be possible.

Electronic device for providing call function and operating method thereof

An electronic device is provided. The electronic device includes at least one processor, which may be configured to establish at least one first protocol data unit (PDU) session in a state of being registered in a 5th generation system (5GS), store first information related to the at least one first PDU session, perform a procedure for registering with an evolved packet system (EPS), based on at least one first trigger causing a system fallback from the 5GS to the EPS, perform a procedure for registering with the 5GS, based on at least one second trigger causing a return to the 5GS, compare second information related to a second PDU session, with the first information, perform an operation of establishing, a third PDU session when the third PDU session not comprised in the second PDU session is identified, and perform an operation of modifying, a fourth PDU session.

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Suwon-si, South Korea

Injae Song