# US 12,192,250 B2 · Electronic device for providing call function and operating method thereof

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- Number: US 12,192,250 B2
- Document ID: US12192250B2
- Status: Granted
- Kind: B2
- Application number: 17/736,630
- Filed: 2022-05-04
- Published: 2022-12-22
- Granted: 2025-01-07
- Earliest claimed: 2021-06-14
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Jonghyun Park; Eunkyoung Lee; Kirak Bae; Seungnam Jin; Yongchul Choi
- Web page: https://patentgrep.com/patent/US12192250B2

## CPC

- H04W 36/1446: {wherein at least one of the networks is unlicensed}
- H04L 65/1016: IP multimedia subsystem [IMS]
- H04L 65/1073: Registration or de-registration
- H04L 65/1095: Inter-network session transfer or sharing
- H04W 36/00: Hand-off or reselection arrangements
- H04W 36/00226: {wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]}
- H04W 36/16: Performing reselection for specific purposes
- H04W 48/02: Access restriction performed under specific conditions
- H04W 48/16: Discovering, processing access restriction or access information
- H04W 76/10: Connection setup
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

The disclosure relates to an apparatus and method for providing a call function in an electronic device. The electronic device includes first communication circuitry supporting new radio (NR) communication and/or long term evolution (LTE) communication, second communication circuitry supporting wireless local area network (LAN) communication, and at least one processor operatively connected to the first communication circuitry and the second communication circuitry. The processor may be configured to resister the electronic device with a network using the NR communication through the first communication circuitry, connect communication with an evolved packet data gateway (ePDG) based on a protocol data unit (PDU) session being identified as being connected over a network using wireless LAN communication in a state in which the electronic device has registered with the network using the NR communication, obtain information related to a call function of the network using the NR communication based on the communication connection with the ePDG, connect the PDU session over the network using the wireless LAN communication, and control the connection with the network using the NR communication based on the information related to the call function of the network using the NR communication.

## Claims

### Claim 1

An electronic device comprising:
first communication circuitry supporting new radio (NR) communication and long term evolution (LTE) communication;
second communication circuitry supporting wireless local area network (LAN) communication; and
at least one processor operatively connected to the first communication circuitry and the second communication circuitry,
wherein the at least one processor is configured to:
register, via the first communication circuitry, the electronic device with an NR network for the NR communication,
connect, via the second communication circuitry, communication with an evolved packet data gateway (ePDG) based on a protocol data unit (PDU) session being identified as being connected over a wireless LAN network for the wireless LAN communication in a state in which the electronic device has registered with the NR network,
obtain, from the ePDG, information related to a call function of the NR network including at least one of information related to whether the NR network supports the call function or information related to whether the NR network supports handover of the PDU session to the NR network,
connect the PDU session over the wireless LAN network,
if the NR network does not support the handover of the PDU session to the NR network, release the registration with the NR network and register the electronic device with an LTE network for the LTE communication, in a state in which the connection of the PDU session over the wireless LAN network is maintained, and
if the NR network supports the handover of the PDU session to the NR network and supports the call function, maintain the registration with the NR network, in a state in which the connection of the PDU session over the wireless LAN network is maintained.

### Claim 2 (depends on 1)

The electronic device of claim 1, wherein the at least one processor is further configured to obtain the information related to the call function of the NR network through an Internet key exchange (IKE) negotiation operation or security association initialization operation for the communication connection with the ePDG.

### Claim 3 (depends on 1)

The electronic device of claim 1, wherein the at least one processor is further configured to control the connection with the NR network based on at least one of an operation mode or network policy of the electronic device, based on the handover of the PDU session to the NR network being supported and the call function being not supported by the NR network.

### Claim 4 (depends on 3)

The electronic device of claim 3, wherein the at least one processor is further configured to:
maintain the use of the NR communication based on the electronic device being in an idle mode, and
restrict the use of the NR communication based on the electronic device being in a call mode.

### Claim 5 (depends on 1)

The electronic device of claim 1, wherein the PDU session comprises an Internet protocol multimedia subsystem (IMS) PDU session.

### Claim 6

A method of operating an electronic device, the method comprising:
registering with an new radio (NR) network for NR communication;
connecting communication with an evolved packet data gateway (ePDG) based on a protocol data unit (PDU) session being identified as being connected over a wireless LAN network for wireless LAN communication in a state in which the electronic device has registered with the NR network;
obtaining, from the ePDG, information related to a call function of the NR network including at least one of information related to whether the NR network supports the call function or information related to whether the NR network supports handover of the PDU session to the NR network;
connecting the PDU session over the wireless LAN network; and
if the NR network does not support the handover of the PDU session to the NR network, releasing the registration with the NR network and registering the electronic device with an long term evolution (LTE) network for LTE communication, in a state in which the connection of the PDU session over the wireless LAN network is maintained; and
if the NR network supports the handover of the PDU session to the NR network and supports the call function, maintaining the registration with the NR network, in a state in which the connection of the PDU session over the wireless LAN network is maintained.

### Claim 7 (depends on 6)

The method of claim 6, wherein the obtaining of the information related to the call function of the NR network comprises obtaining the information related to the call function of the NR network through an Internet key exchange (IKE) negotiation operation or security association initialization operation for the communication connection with the ePDG.

### Claim 8 (depends on 6)

The method of claim 6,
wherein the controlling of the connection with the NR network comprises controlling the connection with the NR network based on at least one of an operation mode or network policy of the electronic device, based on the handover of the PDU session to the NR network being supported and the call function being not supported by the NR network.

### Claim 9 (depends on 8)

The method of claim 8, wherein the controlling of the connection with the network using the NR communication comprises:
maintaining the use of the NR communication based on the electronic device being in an idle mode; and
restricting the use of the NR communication based on the electronic device being in a call mode.

### Claim 10 (depends on 6)

The method of claim 6, wherein the PDU session comprises an Internet protocol multimedia subsystem (IMS) PDU session.