Patent Description:
With the recent development of technology, the field of mobile communication systems continues to develop into <NUM> mobile communication technology (e.g., code division multiple access (CDMA), wideband code division multiple access (WCDMA)), and <NUM> mobile communication technology (e.g., long term evolution (LTE), long term evolution advanced (LTE-A)).

Recently, an electronic device may provide a mobile communication service to a user using a subscriber identification module (SIM) in which information of a mobile communication subscriber is stored. Generally, an electronic device uses a single SIM, but an electronic device that can use two or more SIMs has also been released.

<CIT> discloses a method and device for resolving paging collisions in a communication device. The method includes detecting a probable paging collision between two subscriber identity modules (SIMs) of the communication device and determining whether at least one SIM of the communication device has a non-serving cell in a corresponding broadcast control channel (BCCH) allocation list (BA-list). Further, the method includes ascertaining, based on one or more selection parameters, whether the at least one SIM can be selected for forced cell reselection and indicating, based on the ascertaining, exclusion of a currently serving cell of a SIM selected for the forced cell reselection from normal cell reselection procedure. Further, the forced cell reselection is initiated for the selected SIM. Further in some embodiments, if none of the SIMs can be selected for a forced cell reselection, then a Paging Message Position (PMP) recomputation Request is sent to a network controller to change the paging block position computation from IMSI-based computation to TMSI-based computation. <CIT> (<NUM>-<NUM>-<NUM>) discloses that solutions to persistent page collisions include forcing one or more colliding subscriptions operating on the MSMS communication device to reselect to a neighboring cell that has a different DRX cycle in an attempt to avoid such persistent page collisions. <CIT> (<NUM>-<NUM>-<NUM>), discloses a paging collision resolution method for a dual SIM card terminal and a dual SIM card terminal. The paging collision resolution method for the dual SIM card terminal comprises: determining whether a receiving time window of paging channel (PCH) for a first SIM card overlaps a receiving time window of PCH for a second SIM card; and when it is determined that the receiving time window of PCH for the first SIM card overlaps the receiving time window of PCH for the second SIM card, allocating receiving opportunities for PCH to the first and second SIM cards by performing random round robin strategy using a predetermined random sequence. <CIT> (<NUM>-<NUM>-<NUM>) discloses a multi SIM modem capable of receiving paging messages related to at least two subscriber identities. The modem comprises a paging configuration block configured to determine whether a collision between paging occasions related to the respective subscriber identities will be systematic or not, and to launch, when collision has been determined to be systematic, a reselection of a new cell for at least one of the at least two subscriber identities.

If the electronic device is not connected to a network such as a base station for a certain period of time, the electronic device can transmit and receive data to and from the network only at a configured period or when necessary. For example, according to the Institute of Electrical and Electronics Engineers (IEEE) <NUM> communication system standard, the electronic device may operate in an idle mode to minimize power consumption when there is no traffic to be transmitted/received for a predetermined time.

For example, the electronic device in the idle mode can reduce power consumption by monitoring whether a base station transmits a paging message corresponding to the SIM for a configured time, and attempts to receive the paging message according to a certain period (hereinafter referred to as a "paging interval (PI)") in which the paging cycle periodically appears.

In the case of an electronic device capable of using two or more SIMs (e.g., a dual subscriber identification module dual standby (DSDS) device), it is possible to attempt to receive a paging message corresponding to each of the two SIMs, based on a time division system (method).

However, when the paging cycles corresponding to the two SIMs overlap each other (hereinafter, referred to as 'paging conflict [collision]'), the electronic device may only attempt to receive a paging message corresponding to one SIM, and might not attempt to receive a paging message corresponding to the other SIM.

According to aspects of the present disclosure an electronic device and an operation method as defined in the appended claims are provided.

According to various embodiments, even when a paging collision occurs due to overlap of at least a portion of a paging cycle corresponding to a plurality of subscriber identification modules, each paging message corresponding to the plurality of subscriber identification modules can be received.

Hereinafter, various embodiments of the disclosure will be described with reference to the accompanying drawings. It should be appreciated that the embodiments and the terms used therein are not intended to limit the technological features set forth herein to particular embodiments and include various changes, equivalents, and/or alternatives for the corresponding embodiment. With regard to the description of the drawings, similar reference numerals may be used to designate similar or relevant elements. Further, the embodiments of the disclosure have been presented to explain the technical contents of the embodiments of the disclosure and help understanding thereof, and are not intended to limit the scope of the technical features of the disclosure. Therefore, the scope of the disclosure should be construed to include all changes and modifications based on the technical idea of the disclosure.

Hereinafter, techniques described in various embodiments of the disclosure may be used in various wireless access systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and the like. CDMA may be implemented by radio technology such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA may be implemented by radio technologies such as global system for mobile communications (GSM)/general packet radio service (GPRS)/enhanced data rates for GSM evolution (EDGE). OFDMA may be implemented with wireless technologies such as IEEE <NUM> (Wi-Fi), IEEE <NUM> (WiMAX), IEEE <NUM>-<NUM>, and evolved UTRA (E-UTRA). UTRA is a part of the universal mobile telecommunications system (UMTS). The 3rd generation partnership project (3GPP) long term evolution (LTE) adopts OFDMA in the downlink and SC-FDMA in the uplink as a part of evolved UMTS (E-UMTS) using E-UTRA. LTE-A (Advanced) is an evolved version of 3GPP LTE. The invention corresponds to the disclosure of <FIG>, <FIG> and to the related text. The rest of the description and the figures are presented for better understanding the invention.

<FIG> is a block diagram illustrating an electronic device <NUM> in a network environment <NUM> provided as an example suitable for understanding the invention.

The electronic device <NUM> may communicate with the electronic device <NUM> via the server <NUM>. The electronic device <NUM> may include a processor <NUM>, a memory <NUM>, an input device <NUM>, a sound output device <NUM>, a display device <NUM>, an audio module <NUM>, a sensor module <NUM>, an interface <NUM>, a haptic module <NUM>, a camera module <NUM>, a power management module <NUM>, a battery <NUM>, a communication module <NUM>, a subscriber identification module (SIM) <NUM>, or an antenna module <NUM>. In some examples, at least one (e.g., the display device <NUM> or the camera module <NUM>) of the components may be omitted from the electronic device <NUM>, or one or more other components may be added in the electronic device <NUM>. In some examples, some of the components may be implemented as single integrated circuitry.

According to one example, as at least part of the data processing or computation, the processor <NUM> may load a command or data received from another component (e.g., the sensor module <NUM> or the communication module <NUM>) in volatile memory <NUM>, process the command or the data stored in the volatile memory <NUM>, and store resulting data in non-volatile memory <NUM>.

The receiver may be implemented as separate from, or as part of the speaker.

According to an embodiment, the audio module <NUM> may obtain the sound via the input device <NUM>, or output the sound via the sound output device <NUM> or a headphone of an external electronic device (e.g., an electronic device <NUM>) directly (e.g., over wires) or wirelessly coupled with the electronic device <NUM>.

The interface <NUM> may support one or more specified protocols to be used for the electronic device <NUM> to be coupled with the external electronic device (e.g., the electronic device <NUM>) directly (e.g., over wires) or wirelessly.

The connecting terminal <NUM> may include, for example, a HDMI connector, a USB connector, a SD card connector, or an audio connector (e.g., a headphone connector).

The communication module <NUM> may include a wireless communication module <NUM> (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module <NUM> (e.g., a local area network (LAN) communication module or a power line communication (PLC) module). A corresponding one of these communication modules may communicate with the external electronic device via the first network <NUM> (e.g., a short-range communication network, such as Bluetooth™, wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA)) or the second network <NUM> (e.g., a long-range communication network, such as a cellular network, the Internet, or a computer network (e.g., a LAN or a wide area network (WAN)).

The antenna module <NUM> may include an antenna including a radiating element composed of a conductive material or a conductive pattern formed in or on a substrate (e.g., a printed circuit board (PCB)). The antenna module <NUM> may include a plurality of antennas.

According to an example, commands or data may be transmitted or received between the electronic device <NUM> and the external electronic device <NUM> via the server <NUM> coupled with the second network <NUM>.

According to an example, all or some of operations to be executed at the electronic device <NUM> may be executed at one or more of the external electronic devices <NUM>, <NUM>, or <NUM>.

The electronic device <NUM> may be one of various types of electronic devices. The electronic devices are not limited to those described above and are to be considered merely as examples suitable for understanding the invention.

It is to be understood that if an element (e.g., a first element) is referred to, with or without the term "operatively" or "communicatively", as "coupled with," "coupled to," "connected with," or "connected to" another element (e.g., a second element), it means that the element may be coupled with the other element directly (e.g., over wires), wirelessly, or via a third element.

A method according to the appended claims may be included and provided in a computer program product.

Each component (e.g., a module or a program) of the above-described components may include a single entity or multiple entities. One or more of the above-described components may be omitted, or one or more other components may be added. In such a case, the integrated component may still perform one or more functions of each of the plurality of components in the same or similar manner as they are performed by a corresponding one of the plurality of components before the integration. Operations performed by the module, the program, or another component may be carried out sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order or omitted, or one or more other operations may be added.

<FIG> is an exemplary diagram conceptually illustrating a wireless communication system <NUM> provided as an example suitable for understanding the invention.

Referring to <FIG>, the wireless communication system <NUM> (e.g., a part of the network environment <NUM> of <FIG>) may include an electronic device <NUM> (e.g., electronic device <NUM> of <FIG>), a first base station (BS) (Node B, or eNode B) <NUM>, a second base station <NUM> and/or a third base station. The wireless communication system <NUM> may further include, for example, a base station controller ((BSC), or radio network controller (RNC)) supporting each base stations <NUM>, <NUM>, and <NUM>, a mobile switching center ((MSC), serving GPRS support node (SGSN), mobility management entity (MME), or gateway) connected to the base station controller to support switching for a call function, a service center, or the like. The electronic device <NUM> may include all or part of the electronic device <NUM> shown in <FIG>. Hereinafter, the operation of the electronic device <NUM> described may be understood as, for example, an operation of a processor (e.g., the processor <NUM> of <FIG>).

In an embodiment, the base stations <NUM>, <NUM>, and <NUM> may refer to an entity communicating with the electronic device <NUM>, and a BS, a base station transceiver subsystem (BTS), a cell, and a Node B (NB), eNode B (eNB), access point (AP), or network (e.g., network <NUM> in <FIG>).

The electronic device <NUM> may mean an entity communicating with the base stations <NUM>, <NUM>, and <NUM>, and may be referred to as a user equipment (UE), a subscriber station (SS), a wireless device, a mobile station (MS), a mobile equipment (ME), or a terminal.

The first base station <NUM>, the second base station <NUM>, and the third base station <NUM> may respectively form a wireless communication coverage according to the transmission power of the base station to respectively support access to the wireless communication network to the electronic device <NUM> located in the wireless communication coverage. Each base station <NUM>, <NUM>, <NUM> may have one or more cells, and operators providing services within the base stations <NUM>, <NUM>, <NUM> may be identified as public land mobile networks (PLMN). A base station may be defined as one cell for convenience of description.

When the electronic device <NUM> is, for example, a dual subscriber identification module (SIM) device (e.g., a dual SIM dual standby (DSDS) device), the electronic device <NUM> may perform wireless communication services through at least one of the first base station <NUM>, the second base station <NUM>, or the third base station <NUM> according to a user request or a value configured in the electronic device <NUM>. For example, the electronic device <NUM> may simultaneously access the first wireless communication network of the first base station <NUM> and the second wireless communication networks of the second base station <NUM> to simultaneously perform wireless communication services. It is described that the wireless communication service is performed through the first base station <NUM> and the second base station <NUM> for convenience of description, but the disclosure is not limited thereto. For example, an electronic device <NUM> having a first SIM and a second SIM is mainly described, but is not limited thereto, and may be applied to an electronic device <NUM> having three or more SIMs.

The electronic device <NUM> may perform an operation related to base station registration during power on. The electronic device <NUM> may perform an operation of selecting a base station (or cell) (e.g., cell selection/reselection operation) in order to receive a mobile communication service. When the power is turned on, the electronic device <NUM> may search for a base station located in the vicinity to obtain a mobile communication service, and select a base station having a higher priority among the searched base stations (e.g., select a base station corresponding to "SIM").

In the wireless communication system, the electronic device <NUM> may perform a cell selection/reselection operation for optimal wireless access quality. For example, when selecting a base station, the electronic device <NUM> may synchronize each cell through a synchronization channel (SCH) in order to search for a selectable or suitable cell (or base station).

The electronic device <NUM> may receive system information (SI) from the selected base station, for example, after selecting the base station. After the base station is selected, the electronic device <NUM> may receive system information transmitted through a broadcast control channel (BCCH). The electronic device <NUM> may select target cells by obtaining information necessary for base station selection (e.g., cell selection/reselection, or PLMN selection) through system information. Here, the electronic device <NUM> may identify, for example, control information of a random access channel (RACH), location area identification (RACH), cell ID (cell ID), and the like in the system information.

The base station selection operation may be performed for various reasons. For example, when the power of the electronic device <NUM> is turned on, the electronic device <NUM> may perform a base station selection operation in order to camp-on the cell of the service provider to which the electronic device <NUM> has subscribed. The system information may include, for example, information used by the electronic device <NUM> to access the base station. For example, according to <NPL>", the system information may include a master information block (MIB), a scheduling block (SB), and a system information block (SIB). The MIB may include, for example, physical configuration of the base station (e.g., information about bandwidth, etc.). The SB may include, for example, SIB transmission information (e.g., information related to a transmission period, etc.). The SIB may include, for example, a PLMN identifier of a base station, tracking area code (TAC), cell ID, and the like.

The first base station <NUM>, the second base station <NUM>, or the third base station <NUM> may periodically transmit system information to the electronic device <NUM> located in each wireless communication coverage, and may transmit a paging message according to the request of another electronic device to the target electronic device (e.g., the electronic device <NUM>).

The layers of the radio interface protocol between the electronic device <NUM> and each of the base stations <NUM>, <NUM>, <NUM> (or network) may be divided into, for example, first layers (L1, Layer1), second layers (L2, Layer2), and third layers (L3, Layer3), based on the lower three layers of the open system interconnection (OSI) model, which is well known in wireless communication systems. A physical layer (PHY) belonging to the first layer may provide an information transfer service using a physical channel, and the radio resource control (RRC) layer located in the third layer may serve to control radio resources between the electronic device <NUM> and the base station. To this end, the RRC layer may exchange RRC messages with each other between the electronic device <NUM> and the base station.

<FIG> is a diagram illustrating an example of a radio interface protocol structure between an electronic device <NUM> and a base station <NUM> suitable for understanding the invention.

In <FIG>, although not shown, the radio interface protocol structure may be divided into a radio protocol architecture for a user plane (or a data plane) and a radio protocol architecture for a control plane. The user plane represents a protocol stack for transmitting user data (e.g., voice data or Internet packet data), and the control plane may represent a protocol stack for transmission of control signals (e.g., control messages used to manage calls).

Referring to <FIG>, the first layer <NUM> may include a PHY layer <NUM>. The PHY layer <NUM> provides an information transfer service to an upper layer using a physical channel. The PHY layer <NUM> may be connected to an upper medium access control (MAC) layer <NUM> through a transport channel, and data may be moved between the MAC layer <NUM> and the PHY layer <NUM> through the transport channel. In addition, data may be moved between different PHY layers, for example, between a PHY layer of a transmitting side and a receiving side through a physical channel. For example, the PHY layer <NUM> may physically send protocol data units (MAC-PDUs) received from the MAC layer to the base station (e.g., eNode B), or physically receive data from the base station.

The second layer <NUM> may include a MAC layer <NUM>, a radio link control (RLC) layer <NUM>, and a packet data convergence protocol (PDCP) layer <NUM>. The MAC layer <NUM> provides a service to the RLC layer <NUM> which is a higher layer through a logical channel. For example, the MAC layer <NUM> may guarantee data scheduling (e.g., priority processing between electronic devices by dynamic scheduling, priority processing between logical channels of the electronic device, logical channel prioritization, etc.) and data reliability (e.g., data error correction). The RLC layer <NUM> includes three operation modes of transparent mode (TM), unacknowledged mode (UM), and acknowledgment mode (AM), and may be a layer for ensuring data reliability. For example, the electronic device <NUM> may correct reliability through retransmission when the base station <NUM> does not receive a packet or receives an error packet (e.g., a PDU transmission failure). The PDCP layer <NUM> is responsible for header compression and decompression to reduce unnecessary control information to efficiently transmit packets (e.g., IP data), data transmission (e.g., user plane or control plane), encryption and decryption of user plane data and control plane data, integrity protection and integrity verification of duplicate data of control plane data.

The third layer <NUM> may include an RRC layer <NUM>. The RRC layer <NUM> may be defined only in the control plane. The RRC layer <NUM> may be a layer used for the electronic device <NUM> to access and maintain the base station <NUM> (e.g., network, cell). For example, handover may be processed through the RRC layer <NUM>, which should be processed when the electronic device <NUM> moves. When the electronic device <NUM> is in an idle mode, the handover may be processed at a non-access stratum (NAS) layer (not shown) instead of the RRC layer <NUM>. The RRC layer <NUM> may be used to verify whether the electronic device <NUM> is normally connected and maintained to the base station <NUM>. The NAS layer (not shown) may perform functions such as session management and mobility management.

Hereinafter, an RRC state of the electronic device <NUM> and an RRC connection method will be described. In an embodiment, the RRC state indicates whether the RRC of the electronic device <NUM> has a logical connection with the RRC of the base station, and if connected, it may be referred to as a RRC connection state (RRC_CONNECTED), and if not connected, it may be referred to as RRC idle state (RRC_IDLE). According to an embodiment, handover may represent a technique for managing the mobility of the electronic device <NUM> in a connected state (e.g., RRC-CONNECTED), and cell reselection may represent a technique for managing the mobility of the electronic device <NUM> in an idle state (e.g., RRC-IDLE). While the cell to which the electronic device <NUM> handovers is determined by the base station during handover, which cell to select when the electronic device <NUM> reselects the cell may be determined by the electronic device <NUM>. For example, when the cell is reselected, the electronic device <NUM> may determine which cell to camp-on (e.g., a state in which, after the electronic device <NUM> finishes the cell reselection operation, the system information and the paging information are monitored in the newly selected cell) or stay.

Thebase station may identify the electronic device <NUM> in the RRC connection state in a cell unit. On the other hand, the base station cannot identify the RRC idle electronic device <NUM> on a cell-by-cell basis and can manage it in a unit of tracking area (TA), which is a larger area unit than the cell. For example, in order for the electronic device <NUM> in the RRC idle state to receive a service such as voice or data from a cell, the electronic device <NUM> should transit the state to the RRC connected state.

When the electronic device <NUM> is powered on by the user, first, an appropriate cell may be searched (e.g., a cell selection operation) and then may be in an RRC idle state in the corresponding cell. When it is necessary to establish an RRC connection in the RRC idle state, the electronic device <NUM> may transit to the RRC connection state by performing an RRC and RRC connection establishment operation of the base station. In an embodiment, the case in which an RRC connection is established may include, for example, a case in which uplink data transmission is required due to a user's call attempt, a paging message is received from a base station and a response message needs to be transmitted.

According to an embodiment, the base station might not have the context of the electronic device <NUM> when the electronic device <NUM> is in an idle state. Accordingly, the electronic device <NUM> may perform mobility-related operations, based on the electronic device <NUM>, such as a cell selection or cell reselection operation, without receiving a command from a base station when the electronic device <NUM> is in an idle state. According to an embodiment, the electronic device <NUM> in an idle state may periodically wake-up to identify whether there is a paging message for the electronic device <NUM>. While camping-on a cell, the electronic device <NUM> may receive system information broadcast by a base station, periodically measure a signal of a serving cell, and when cell reselection is triggered, measure the signals of neighboring cells to perform an operation such as reselection of the serving cell.

Hereinafter, an example of operation of the electronic device <NUM> according to various embodiments will be described with reference to <FIG>, <FIG>, and <FIG>.

<FIG> is a diagram illustrating an operation of providing a communication service of an electronic device <NUM> provided as an example suitable for understanding the invention. <FIG> and <FIG> are diagram illustrating examples of a paging cycle (or paging location) (e.g., time to read (identify) paging) corresponding to a plurality of subscriber identification modules (e.g., first SIM <NUM>, second SIM <NUM>) suitable for understanding the invention.

The operation according to <FIG> may be an operation performed by a processor (e.g., the processor <NUM> of <FIG>) of the electronic device <NUM>, and may be an example in which the electronic device <NUM> includes two subscriber identification modules (e.g., first SIM <NUM> and second SIM <NUM>).

As shown in <FIG> illustrates a scheduler, a radio interface protocol corresponding to the first SIM <NUM> (e.g., RRC layer <NUM>, PHY layer <NUM>), and a portion of a radio interface protocol (e.g., RRC layer <NUM>, PHY layer <NUM>) corresponding to the second SIM <NUM> is illustrated.

Theelectronic device <NUM>, for example, may be in a state of monitoring system information and paging (or paging information) while operating in an idle mode without data transmission/reception through the first SIM <NUM> and the second SIM <NUM>. For example, the electronic device <NUM> may be in a state of currently in an idle state and camping-on a first base station <NUM> corresponding to the first SIM <NUM> and a second base station <NUM> corresponding to the second SIM <NUM>.

The electronic device <NUM> may receive system information from a base station (e.g., the first base station <NUM> of <FIG> and the second base station <NUM> of <FIG>) in an idle mode. In <FIG>, the first paging service may be requested (e.g., receiving a first paging message) from the first base station <NUM> in which the electronic device <NUM> camps-on by the first SIM <NUM> in the idle mode, and then a second paging service may be requested (e.g., receiving a second paging message) from the second base station <NUM> in which the electronic device <NUM> camps-on by the second SIM <NUM>. For convenience of description, the first base station <NUM> and the second base station <NUM> are described, but are not limited thereto. For example, it can also be understood that the electronic device <NUM> operates on a cell basis based on different cells (e.g., first cell, second cell) included in one or each base station through the first SIM <NUM> and the second SIM <NUM>.

Referring to <FIG>, in operation <NUM>, when the paging (or packet service request) is generated from the currently camped-on base station (e.g., the first base station <NUM>), the electronic device <NUM> may transmit a request (e.g., PCH_CONFIG_REQ) for forming a paging channel (PCH) for transmitting a paging message to the PHY layer <NUM> through the RRC layer <NUM> to the PHY layer <NUM>.

In operation <NUM>, the PHY layer <NUM> may transmit a resource allocation request (e.g., RESOURCE_REQ) to the scheduler <NUM> in response to the PCH_CONFIG_REQ.

When paging occurs based on the first SIM <NUM>, as in operation <NUM> (e.g., PCH_CONFIG_REQ for the second paging message) and operation <NUM> (e.g., RESOURCE_REQ for the second paging message), paging may also occur based on the second SIM <NUM>. For example, a paging time point may overlap in the first SIM <NUM> and the second SIM <NUM>. As described above, when the paging timings of the first SIM <NUM> and the second SIM <NUM> overlap, it is not possible to receive one paging and the probability of paging reception may decrease. This will be described with reference to <FIG>.

Referring to <FIG>, in relation to the first SIM <NUM>, the electronic device <NUM> may wake up to identify (or monitor) whether there is a paging message related to the first SIM <NUM> at a first paging cycle <NUM> (e.g., time to read (or identify) paging) of the first SIM <NUM>, for example, every paging discontinuous reception (DRX) cycle (e.g., t1, t3, and t5 time points). In relation to the second SIM <NUM>, the electronic device <NUM> may wake up to identify whether there is a paging message related to the second SIM <NUM> at a second paging cycle <NUM> (e.g., time points from t1 to t5) of the first SIM <NUM>. In this case, at least a portion of the time to identify the paging associated with the first SIM <NUM> in the first paging cycle <NUM> and the time to identify the paging associated with the second SIM <NUM> in the second paging cycle <NUM> may overlap at least partially and a paging conflict may occur.

In <FIG> and <FIG>, a time interval T1 between paging points of the first paging cycle <NUM> may be configured longer than a time interval T2 between paging points of the second paging cycle <NUM>. For example, it may represent that the paging time of the second paging cycle <NUM> occurs more frequently than the paging time of the first paging cycle <NUM>.

Generally, for example, when a paging collision occurs (e.g., t1, t3, t5 time points), the electronic device <NUM> may perform a paging-related operation (e.g., receiving a paging message related to the first SIM <NUM>) (e.g., grant), based on a paging (or a wake-up SIM (e.g., the first SIM <NUM>)) that is generated first, and may prevent (e.g., reject) a paging-related operation (e.g., receiving a paging message related to the second SIM <NUM>) for paging generated later (or wake-up SIM (e.g., second SIM <NUM>)). Accordingly, in the related art, paging related to the second SIM <NUM> might not be received. For example, when the paging timings of the first SIM <NUM> and the second SIM <NUM> overlap, a paging reception probability associated with any one SIM may decrease.

Referring back to <FIG>, the scheduler <NUM> may determine paging-related operations of the first SIM <NUM> and the second SIM <NUM> according to the scheduling according to the paging cycle of the first SIM <NUM> and the second SIM <NUM>. The scheduler <NUM> may determine to perform a paging-related operation on the first SIM <NUM> and not to perform a paging-related operation on the second SIM <NUM>. Accordingly, the scheduler <NUM>, in operation <NUM>, may transmit an acknowledgment response (e.g., GRANT) to the PHY layer <NUM> of the first SIM <NUM>, and transmit a rejection response (e.g., REJECT) to the PHY layer <NUM> of the second SIM <NUM> in operation <NUM>. The scheduler <NUM> may include a reject cause (e.g., paging collision information) or separately provided when transmitting a rejection response to the PHY layer. The rejection response may be transmitted to the PHY layer by PCH.

The PHY layer <NUM> to which an acknowledgment response (e.g., GRANT) has been delivered may perform paging-related operations through the RRC layer <NUM>. For example, in connection with the first SIM <NUM>, the electronic device <NUM> may transit from an RRC idle state to an RRC connected state in order to receive packet services such as voice or data from a base station (e.g., a camped-on cell).

In operation <NUM>, the PHY layer <NUM> to which the rejection response (e.g., REJECT) is transmitted may transmit collision information (e.g., COMPLICT_IND) to the RRC layer <NUM> in response to the rejection response of the scheduler <NUM>.

In operation <NUM>, the RRC layer <NUM> may execute a timer (e.g., timer start) in response to collision information (e.g., COMPLICT_IND) of the PHY layer <NUM>. The RRC layer <NUM> may count a certain time related to cell reselection.

The RRC layer <NUM> may transmit a collision response (e.g., COMPLICT_RSP) to the PHY layer <NUM> in operation <NUM> in response to a timer expired (e.g., timeout), and may initiate an operation related to cell reselection (cell reselection triggering) in operation <NUM>. The electronic device <NUM> may perform a cell reselection operation related to the second SIM <NUM>, based on system information broadcast by the base station.

When a paging collision occurs in the first SIM <NUM> and the second SIM <NUM>, in relation to the second SIM <NUM> where paging is rejected (or RRC idle), a cell reselection operation may be performed to select a cell in which collision does not occur. Through this, in various embodiments, paging collision between the first SIM <NUM> and the second SIM <NUM> may be avoided, thereby increasing the paging reception rate of the electronic device <NUM>. An example of this is shown in <FIG>. A cell reselection operation according to various examples will be described with reference to the drawings described below.

After completing the cell reselection operation, the electronic device <NUM> may receive system information and paging information from the newly selected cell, and a paging cycle (e.g., a third paging cycle <NUM>) associated with the newly selected cell may be configured, based on the received paging information. For example, referring to <FIG>, with respect to the second SIM <NUM>, the second paging cycle <NUM> of <FIG> may be changed to a third paging cycle <NUM> associated with a newly selected cell (e.g., camped-on cell) by cell reselection. The first paging cycle <NUM> may include, for example, t1, t3, and t5 time points, and the third paging cycle <NUM> may include time points that do not overlap with the first paging cycle <NUM>, for example, t11 to t16. As such, in the first paging cycle <NUM>, since a paging segment for paging monitoring related to the first SIM <NUM> and a paging segment for paging monitoring related to the second SIM <NUM> in the third paging cycle <NUM> do not overlap, paging collisions may not occur.

<FIG> is a block diagram of a configuration of an electronic device <NUM> using a plurality of subscriber identification modules according to various embodiments.

Referring to <FIG>, the electronic device <NUM> includes a processor <NUM> (e.g., the processor <NUM> of <FIG>), a communication module <NUM> (e.g., a communicator including a circuit (or a communication circuitry (e.g., communication module <NUM> of <FIG>)) and/or a subscriber identification module <NUM> (e.g., subscriber identification module <NUM> of <FIG>).

The subscriber identification module <NUM> includes two or more SIMs, a universal SIM (USIM), or an embedded SIM (eSIM). According to an embodiment, the subscriber identification module <NUM> may include unique identification information (e.g., integrated circuit card identifier (ICCID)) or subscriber information (e.g., international mobile subscriber identity (IMSI)). In various embodiments, a plurality of subscriber identification modules are described as two SIMs (e.g., the first SIM <NUM> and the second SIM <NUM>) for convenience of description, but the disclosure is not limited thereto. The device <NUM> may operate at least three or more subscriber identification modules.

According to an embodiment, the processor <NUM> may receive various signals (e.g., system information, paging information, paging message, etc.) from a base station (e.g., a network, cell) through the communication module <NUM>.

According to an embodiment of the disclosure, when the electronic device <NUM> is powered on, the processor <NUM> may search for an appropriate base station (e.g., a high-priority base station) among neighboring base stations (e.g., a network or a cell) to acquire a communication service, camp-on (or access) the discovered base station, and then exist in an idle state (e.g., RRC_IDLE) in the corresponding base station. For example, the processor <NUM> may operate in an idle mode without data transmission and reception with a base station corresponding to the first SIM <NUM> and the second SIM <NUM>, respectively.

According to an embodiment, the processor <NUM> may receive system information broadcast by the base station while camping-on the base station. For example, the processor <NUM> may receive system information broadcast by a base station (e.g., a base station camped on the basis of the first SIM <NUM>, a base station camped on the basis of the second SIM <NUM>) through the communication module <NUM> in the idle mode. In various embodiments, the system information is information broadcast by the base station, and may be composed of, for example, MIB and SIB (e.g., SIB <NUM> to SIB <NUM>). The processor <NUM> performs a cell reselection operation, based on system information broadcast by the base station.

According to various embodiments of the disclosure, the processor <NUM> may monitor paging while operating in an idle mode without data transmission and reception through the first SIM <NUM> and the second SIM <NUM>. Hereinafter, paging may be first identified by the first SIM <NUM>, based on at least the monitoring result, and then paging may be identified by the second SIM <NUM>.

According to one embodiment, the processor <NUM> may identify (monitor) whether there is a paging attempt related to the first SIM (<NUM>) in the paging cycle associated with the first SIM <NUM> (or the paging time position to check paging) (e.g., the DRX cycle) (hereinafter referred to as a "first paging cycle"). According to an embodiment, the processor <NUM> may identify (monitor) whether there is a paging attempt related to the second SIM <NUM> in the paging cycle associated with the second SIM <NUM> (hereinafter, referred to as a "second paging cycle").

The processor <NUM> determines whether a paging conflict in which a first paging cycle related to the first SIM <NUM> overlaps with a second paging cycle related to the second SIM <NUM> occurs, when monitoring paging related to each of the first SIM <NUM> and the second SIM <NUM>. According to an embodiment, the processor <NUM> may compare a first paging cycle related to the first SIM <NUM> and a second paging cycle related to the second SIM <NUM> having no data transmission/reception (e.g., in an idle state), and determine whether there is a paging collision between the first paging cycle and the second paging cycle, based at least on the result of the comparison, while transmitting and receiving data (e.g., paging processing, packet processing), based on the first SIM <NUM>.

If it is determined that a paging collision occurs between the first SIM <NUM> and the second SIM <NUM>, the processor <NUM> performs a cell reselection operation, based on the second SIM <NUM> having no data transmission/reception. According to an embodiment, the processor <NUM> may select a new serving cell among neighboring cells of a serving cell that is currently camping on, based on the second SIM <NUM> to perform a cell reselection operation for camping on.

In various embodiments, the processor <NUM> may perform a cell reselection operation, based on the cell using the same frequency as the serving cell currently camping on, based on the second SIM <NUM>, using a different frequency, or using another radio access technology (RAT). In various embodiments, in the cell reselection operation, the electronic device <NUM> in an idle state may wake up every paging cycle (e.g., a DRX cycle) to measure a signal of a serving cell, determine a reception level of the serving cell, and determine whether to select another cell, based on the reception level of the serving cell. In various embodiments, it is possible to avoid the paging collision between the plurality of subscriber identification modules by determining whether there is a paging collision between a plurality of subscriber identification modules, and selecting another cell in one subscriber identification module (e.g., an idle SIM) (e.g., performing a cell reselection operation), when a paging conflict occurs, or may occur later.

For the second SIM <NUM>, when cell reselection for selecting another cell is triggered (e.g., triggering detection (or detection) for cell reselection) due to paging collision (or paging collision prediction), the processor <NUM> performs a cell reselection operation, based on system information.

According to one embodiment, the processor <NUM> may measure the signal strength (e.g., RSRP, reference signal received power) value of neighbor cells, based on system information (e.g., system information related to cell reselection, for example, SIB <NUM> and SIB <NUM>), determine a rank for each cell based on the measured value of the neighbor cell, and select an optimal cell (e.g., a cell having the highest priority) as a new serving cell, based on the determination result. Thereafter, the processor <NUM> may perform an operation to camp on the selected new cell of the second SIM <NUM>.

According to various embodiments, quality may be increased in selecting a new serving cell through an additional determination operation in a cell reselection operation.

According to an embodiment of the disclosure, when a paging collision occurs, the processor <NUM> may determine whether there is a change in the serving cell for a time configured (e.g., a predetermined time) from a paging collision or at least one of the first SIM <NUM> or the second SIM <NUM>. For example, the processor <NUM> may identify whether there is a change in the serving cell of the first SIM <NUM> or the serving cell of the second SIM <NUM> for a predetermined time after the paging collision occurs. According to an embodiment, the variation of the serving cell may be caused by cell reselection (e.g., general cell reselection operation) according to a decrease in the reception level of the serving cell when moving away from the current serving cell, for example, due to movement of the electronic device <NUM>.

The processor <NUM> identifies whether there is a change in the serving cell of the first SIM <NUM> or the serving cell of the second SIM <NUM> for a predetermined time after the paging collision occurs. According to an embodiment, when the location of the electronic device <NUM> changes (e.g., when moving away from the current serving cell) as the user using the electronic device <NUM> moves, the serving cell may be changed by cell reselection (e.g., normal cell reselection) according to a decrease in the reception level of the serving cell. According to an embodiment, the processor <NUM> may determine whether the serving cell changes based on the cell ID of the base station corresponding to the first SIM <NUM> or the second SIM <NUM>.

According to an embodiment, if it is determined that there is a change in the serving cells of the first SIM <NUM> or the second SIM <NUM> for a predetermined period of time, the processor <NUM> may perform an initial operation (e.g., an operation for determining whether a paging collision is occurring) again. For example, when there is a change in the serving cell, the paging cycles of the first SIM <NUM> and the second SIM <NUM> might not overlap. Accordingly, the processor <NUM> may switch back to an initial stage and identify again whether there is a paging collision between the serving cell of the first SIM <NUM> and the serving cell of the second SIM <NUM>.

If it is determined that there is no change in the serving cells of the first SIM <NUM> and the second SIM <NUM> for a certain period of time (e.g., the electronic device <NUM> is stopped), the processor <NUM> determine a SIM (e.g., the second SIM <NUM>) having no data transmission/reception (e.g., an idle state), and perform cell reselection operations in the corresponding SIM.

According to various embodiments, the processor <NUM> may manage a list (e.g., a cell list or a cell bar list) of SIMs (e.g., the second SIM <NUM> in an idle state) for which data service is not possible, for each serving cell of a SIM capable of data service (e.g., the first SIM <NUM>). For example, the processor <NUM> may manage the cell ID of a serving cell in which a paging collision has occurred with a serving cell of the first SIM <NUM> among serving cells previously and currently camped-on by the second SIM <NUM> as a list in association with (or mapping) to the serving cell of the first SIM (<NUM>). Through this, in various embodiments, a ping-pong phenomenon can be prevented. For example, in a case in which paging collision between a serving cell (e.g., Cell A) of the first SIM <NUM> capable of data service and a serving cell (e.g., Cell B) of the second SIM <NUM> in which data service is not possible (e.g., in an idle state) is possible, in a situation where the first SIM <NUM> camps-on Cell A, the second SIM <NUM> might not camp-on Cell B. For example, the processor <NUM> may allow Cell B to be excluded from the target cell in the cell reselection operation of the second SIM <NUM>.

According to various embodiments, the processor <NUM> may further consider signal quality (e.g., RSRQ, reference signal received quality) as well as signal strength (e.g., RSRP), in selecting the target cell for the serving cell during the cell reselection operation of the idle second SIM <NUM>. According to an embodiment, upon cell reselection the processor <NUM> may select a cell that satisfies a reference (e.g., a reference level) in which a cell reception level (e.g., signal strength) is configured as a target cell (e.g., a candidate cell for a serving cell). For example, the reference level may include a signal measurement value for normally exchanging a signal (or message) between the electronic device <NUM> and a cell. According to an embodiment, if cell reselection is performed with a weak electric field cell when cell reselection, paging reception rate may decrease. Accordingly, according to various embodiments, an electric field condition may be configured as a target cell condition by considering at least a value higher than a value specified in the 3GPP standard specification. According to an embodiment, if a cell corresponding to a target cell condition is not found, the processor <NUM> may perform cell reselection based on a cell having a higher priority in a managed list (e.g., a cell list). For example, the processor <NUM> may identify the signal strength of a cell corresponding to each cell ID included in the list, and perform the second SIM <NUM> cell reselection, based on the cell having the strongest signal strength.

The electronic device <NUM> includes a first subscriber identification module (e.g., first SIM <NUM>), a second subscriber identification module (e.g., second SIM <NUM>), communication circuits <NUM> and <NUM> operatively connected to the first subscriber identification module and the second subscriber identification module, and processors <NUM> and <NUM> operatively connected to the communication circuits <NUM> and <NUM>, wherein the processors <NUM> and <NUM> monitors the paging cycle for the first subscriber identification module and the second subscriber identification module, determines whether a paging conflict in which at least some sections overlap in a first paging cycle of the first subscriber identification module and a second paging cycle of the second subscriber identification module, and performs cell reselection in response to the idle subscriber identification module among the first subscriber identification module or the second subscriber identification module, based on whether the paging collision occurs.

Hereinafter, a method of providing communication service of the electronic device <NUM> using a plurality of subscriber identification modules according to various embodiments will be described. Hereinafter, in describing an operation method of the electronic device <NUM>, a detailed description of the contents overlapping with those described in the description with reference to the above-described drawings (e.g., <FIG>) will be omitted. Hereinafter, the operation of the electronic device <NUM> may be an operation performed (or processed) by a processor of the electronic device <NUM> (for example, the processor <NUM> of <FIG> or the processor <NUM> of <FIG>) (hereinafter referred to as a "processor <NUM>").

<FIG> is a flowchart illustrating a method for providing communication service of an electronic device <NUM>.

Referring to <FIG>, in operation <NUM>, the processor <NUM> of the electronic device <NUM> monitors a paging cycle. The processor <NUM> monitors each paging cycle corresponding to a plurality of subscriber identification modules (e.g., the first SIM <NUM> and the second SIM <NUM>). According to an embodiment, the processor <NUM> may identify a first paging cycle associated with the first SIM <NUM> and a second paging cycle associated with the second SIM <NUM>. In various embodiments, after the first SIM <NUM> and the second SIM <NUM> are camped-on each serving cell, both the first SIM <NUM> and the second SIM <NUM> operate in an idle mode without data transmission or reception, or any one SIM of the first SIM <NUM> or the second SIM <NUM> may be in an active state for transmitting and receiving data.

In operation <NUM>, the processor <NUM> determines whether a paging collision occurs, based at least on the monitoring result of the paging cycle. The processor <NUM> determines whether a paging collision occurs in which the first paging cycle associated with the first SIM <NUM> overlaps the second paging cycle associated with the second SIM <NUM>. For example, the processor <NUM> may determine whether a time point when the first SIM <NUM> wakes up according to the first paging cycle to identify whether there is a paging attempt, and a time point when the second SIM <NUM> wakes up according to the second paging cycle to identify whether there is a paging attempt overlap, and determine whether a paging collision occurs, based on the result.

In operation <NUM>, if it is determined that there is no paging collision (NO in operation <NUM>), the processor <NUM> may proceed to operation <NUM> and perform operations subsequent to operation <NUM>.

In operation <NUM>, the processor <NUM> determines the SIM in operation <NUM> if it determines a paging collision (YES in operation <NUM>). According to an embodiment, the processor <NUM> may determine a SIM to perform cell reselection to avoid paging collision. According to an embodiment of the disclosure, the processor <NUM> may determine an idle SIM without data transmission and reception. According to an embodiment, the user may determine one SIM to use a data service among the first SIM <NUM> and the second SIM <NUM> through a user interface (UI). For example, when the user configures the use of the data service through the first SIM <NUM>, in the case of the second SIM <NUM>, the data service itself may be deactivated. According to various embodiments, when a paging collision occurs between the first SIM <NUM> and the second SIM <NUM>, a cell reselection operation may be performed based on a SIM (for example, the second SIM <NUM>) in which data transmission and reception is not configured. For example, in various embodiments, a cell reselection operation may be performed in a SIM without data transmission and reception (e.g., an idle state) and a SIM in which data transmission and reception is not configured by the user.

In operation <NUM>, the processor <NUM> performs a cell reselection operation. The processor <NUM> determines whether there is a change in the serving cell in at least one of the first SIM <NUM> or the second SIM <NUM> for a configured time (e.g., timer expiration) from the time when the paging collision is determined. When the serving cell is not changed, the processor <NUM> performs cell reselection for the second SIM <NUM> in an idle state. According to an embodiment, through the cell reselection of the second SIM <NUM>, the second SIM <NUM> may be changed to a paging cycle related to a new serving cell (e.g., a third paging cycle that does not overlap with the first paging cycle), the paging collision according to the first paging cycle of the first SIM <NUM> and the third paging cycle of the changed second SIM <NUM> can be prevented.

<FIG> is a flowchart illustrating a method of providing a communication service of an electronic device <NUM> using a plurality of subscriber identification modules.

Hereinafter, the operation of the electronic device <NUM> may be an operation performed (or processed) by the processor (e.g., the processor <NUM> of <FIG> or the processor <NUM> of <FIG>) (hereinafter referred to as a "processor <NUM>") of the electronic device <NUM>.

Referring to <FIG>, in operation <NUM>, the processor <NUM> of the electronic device <NUM> monitors a paging cycle. According to an embodiment, the processor <NUM> may identify a first paging cycle associated with the first SIM <NUM> and a second paging cycle associated with the second SIM <NUM>. In various embodiments, in monitoring of a paging cycle (e.g., a monitoring trigger), for example, the electronic device <NUM> may move to enter a new cell (e.g., changing the serving cell of the first SIM <NUM> or the second SIM <NUM>), or respond to receiving a paging message from at least one of the first SIM <NUM> or the second SIM <NUM>. The first SIM <NUM> and the second SIM <NUM> are camped-on each serving cell, and both the first SIM <NUM> and the second SIM <NUM> operate in an idle mode without data transmission/reception, or any one of the first SIM <NUM> and the second SIM <NUM> may be in an active state in which data is transmitted and received.

In operation <NUM>, the processor <NUM> determines whether a paging collision occurs, based at least on the monitoring result of the paging cycle. According to an embodiment, the processor <NUM> may determine whether a paging collision occurs in which at least some sections of the first paging cycle associated with the first SIM <NUM> and the second paging cycle associated with the second SIM <NUM> overlap. For example, the processor <NUM> may determine whether a time point when the first SIM <NUM> wakes up according to the first paging cycle to identify whether there is a paging attempt, and a time point when the second SIM <NUM> wakes up according to the second paging cycle to identify whether there is a paging attempt overlap, and determine whether a paging collision occurs, based on the result.

In operation <NUM>, if it is determined that there is no paging collision (NO in operation <NUM>), the processor <NUM> may proceed to operation <NUM> to perform operations after operation <NUM>.

In operation <NUM>, if the processor <NUM> determines a paging collision (YES in operation <NUM>), in operation <NUM>, the processor <NUM> may update the list of subscriber identification modules. According to an embodiment, the processor <NUM> may add a serving cell (e.g., cell ID) corresponding to the idle second SIM <NUM> to the list. For example, the processor <NUM> may manage the cell ID of the serving cell of the second SIM <NUM> as a list, in which a paging collision with the serving cell of the first SIM <NUM> occurs, associated (or mapped) with the cell ID of the serving cell of the first SIM <NUM>. In various embodiments, description will be given with reference to <FIG> and <NUM> described below in connection with list management.

In operation <NUM>, the processor <NUM> determines whether there is a change in the serving cell. When a paging collision occurs, the processor <NUM> determines whether the serving cell is changed in at least one of the first SIM <NUM> or the second SIM <NUM> for a configured time (e.g., a predetermined time) from the time the paging collision occurs.

In operation <NUM>, when at least one serving cell of the first SIM <NUM> or the second SIM <NUM> is changed for a predetermined time (YES in operation <NUM>), the processor <NUM> may proceed to operation <NUM>, and may perform operations subsequent to operation <NUM>.

In operation <NUM>, if neither of the serving cells of the first SIM <NUM> and the second SIM <NUM> has been changed for a period of time (NO in operation <NUM>), in operation <NUM>, the processor <NUM> determines in operation <NUM> whether there is a target cell that satisfies the configuration condition. According to an embodiment of the disclosure, the processor <NUM> may determine (or measure) signal strength of at least one neighboring cell associated with the idle second SIM <NUM>, and determine whether there is a target cell (e.g., candidate cell for serving cell) among the neighboring cells that satisfies a reference level for which signal strength (or signal quality, etc.) is configured. In various embodiments, the reference level may include a signal measurement value for normally exchanging messages between the electronic device <NUM> and a cell. According to an embodiment, when cell reselection is performed with a weak electric field cell when cell reselection, the paging reception rate may decrease. Accordingly, according to various embodiments, the electric field condition may be configured as a target cell condition by considering at least a value higher than the value specified in the standard specification.

In operation <NUM>, the processor <NUM> may determine a serving cell among the target cells in operation <NUM> when a target cell exists among neighboring cells (YES in operation <NUM>). According to an embodiment, the processor <NUM> may determine a cell having a high priority (e.g., the strongest received signal strength) among target cells as a serving cell. According to an embodiment, when there is only one target cell, operation <NUM> might not be performed, and the processor <NUM> may determine the corresponding cell as a serving cell and immediately perform a cell reselection operation.

In operation <NUM>, when a target cell does not exist among neighboring cells (NO in operation <NUM>), in operation <NUM>, a serving cell may be determined from among cells in the list. According to an embodiment of the disclosure, if the cell corresponding to the target cell condition is not searched among the neighboring cells, the processor <NUM> may determine a cell having a high priority (e.g., the strongest received signal strength) as a serving cell by referring to a list that is being managed (e.g., a list of cells related to the second SIM <NUM> of the idle state).

The processor <NUM> performs a cell reselection operation in operation <NUM> in response to determining the serving cell in operation <NUM> or operation <NUM>. According to an embodiment, the processor <NUM> may perform cell reselection for the second SIM <NUM> in an idle state.

<FIG>, <FIG>, and <FIG> are diagrams illustrating a list managed in an electronic device <NUM> according to various embodiments and an example of using the list.

Referring to reference number <NUM> of <FIG>, for Cell A of the first SIM <NUM>, Cell B of the second SIM <NUM> may represent a state registered as a cell in which a paging collision occurs. In various embodiments, for each serving cell of the first SIM <NUM> capable of data service, a serving cell corresponding to the second SIM <NUM> in an idle state may be managed as a list. According to an embodiment, the electronic device <NUM> may include the cell ID of the serving cell of the first SIM <NUM> among the serving cells previously camped on by the second SIM <NUM> and the cell ID of the serving cell in which a paging collision has occurred in the list <NUM>, in association with (or mapping to) the serving cell of the first SIM <NUM>. Through this, when the first SIM <NUM> capable of data service is camped on the serving cell (e.g., Cell A), when the cell reselection of the second SIM <NUM> is performed, the electronic device <NUM> may prevent the second SIM <NUM> from camping on the Cell B. For example, the electronic device <NUM> may exclude Cell B from the target cell in the cell reselection operation of the second SIM <NUM>.

The reference number <NUM> of <FIG> may represent an example of list updating of a case in which a cell C corresponding to a new cell entry of the electronic device <NUM> or cell selection/reselection of the second SIM <NUM> in an idle state has a paging collision with Cell A where the first SIM <NUM> is camped on. According to an embodiment, the electronic device <NUM> may add the cell ID of Cell C to the list <NUM> as a cell that causes a paging collision to Cell A of the first SIM <NUM>.

Reference numeral <NUM> and reference numeral <NUM> of <FIG> may represent a list related to Cell D of the first SIM <NUM> when the serving cell of the first SIM <NUM> of the electronic device <NUM> is changed to Cell D. Reference number <NUM> may represent a list <NUM> of a state in which no paging collision has occurred between Cell D of the first SIM <NUM> and the serving cell of the second SIM <NUM>. Reference numeral <NUM> may represent an example of list updating when a cell B corresponding to cell selection/reselection of the second SIM <NUM> in the new cell entering or idle state of the electronic device <NUM> collides with the cell D in which the first SIM <NUM> is camped on. According to an embodiment, the electronic device <NUM> may add the cell ID of Cell B to the list <NUM> as a cell that causes a paging collision to Cell D of the first SIM <NUM>.

As shown in <FIG> and <FIG>, according to various embodiments, the electronic device <NUM> may manage each list of SIMs (e.g., the second SIM <NUM> in an idle state) for which data service is not possible, for each cell of a SIM capable of data service (e.g., the first SIM <NUM>). According to an embodiment, the electronic device <NUM> may include a first list in which cells of the second SIM <NUM> in which a paging collision occurs with a first serving cell of the first SIM <NUM> are mapped, and a second list in which the cells of the second SIM <NUM> in which a paging collision occurs with the second serving cell of the second SIM <NUM> are mapped. For example, the electronic device <NUM> may configure the cell-specific list of the first SIM <NUM> as an array.

According to an embodiment, the electronic device <NUM> may configure a cell-specific list of the first SIM <NUM> based on one list. An example of this is shown in list <NUM> in <FIG>. Referring to <FIG>, the electronic device <NUM> may configure a list <NUM> to which cells corresponding to the second SIM <NUM> are respectively mapped, for each cell (e.g., Cell A, Cell D) corresponding to the first SIM <NUM>, thereby managing a list of paging collisions. According to various embodiments, the list (e.g., the list <NUM>, the list <NUM>, or the list <NUM>) managed by the electronic device <NUM> may be stored in the memory of the electronic device <NUM> (e.g., the memory <NUM> of <FIG>).

Claim 1:
An electronic device (<NUM>) comprising:
a first subscriber identification module (<NUM>);
a second subscriber identification module (<NUM>);
a communication circuitry (<NUM>) operatively connected to the first subscriber identification module and the second subscriber identification module, wherein the first subscriber identification module is in a radio resource control, RRC, connection state, and the second subscriber identification module is in an RRC idle state, and the idle state is configured to include a state without data transmission/reception, based on the subscriber identification module; and
a processor (<NUM>) operatively connected to the communication circuitry,
wherein processor (<NUM>) is configured to:
- monitor (<NUM>, <NUM>) paging cycles for the first subscriber identification module and the second subscriber identification module,
- determine (<NUM>, <NUM>) whether a paging conflict has occurred in which a first paging cycle of the first subscriber identification module and a second paging cycle of the second subscriber identification module overlap for at least a certain interval, and
- determine (<NUM>, <NUM>) whether a serving cell is changed in at least one of the first subscriber identification module (<NUM>) and the second subscriber identification module (<NUM>) for a certain interval, when the processor determines (<NUM>, <NUM>) that the paging conflict has occurred;
- perform cell reselection (<NUM>, <NUM>) for the second subscriber identification module (<NUM>) in an idle state, based on no change in the serving cell of the first subscriber identification module (<NUM>) and the serving cell of the second subscriber identification module for the certain interval.