Method and device for reporting IDC problem in MUSIM environment

Abstract

The present disclosure relates to a method performed by a terminal supporting a plurality of SIMs in a wireless communication system, the method comprising the steps of: identifying a frequency band affected by a second network related to a second SIM; and transmitting, to a first network related to the first SIM, a terminal assistance information message including information on a frequency band affected by the second network.

Description

Technical Field

[0001] The present disclosure relates to operations of a UE and a base station in a mobile communication system, and more particularly, to a method for reporting an In-Device Coexistence (IDC) problem in the communication system and a device for performing the method. Background Art

[0002] 5G mobile communications technology defines a wide frequency band to enable high transmission rates and new services, and can be implemented not only in "sub-6 GHz" frequency bands such as 3.5 GHz, but also in "above 6 GHz" frequency bands, known as mmWave (millimeter wave) bands, including 28 GHz and 39 GHz. Furthermore, to achieve transmission rates fifty times faster than 5G mobile communications technology and ultra-low latency one-tenth that of 5G mobile communications technology, consideration is being given to implementing sixth-generation mobile communications technology (referred to as "beyond 5G systems") in the terahertz frequency band (e.g., the 95 GHz to 3 THz band).

[0003] In the initial stages of 5G mobile communication technology, in order to support services and meet performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine-type communications (mMTC), standardization is underway on the following technologies: beamforming and massive multiple-input multiple-output (MIMO) for mitigating radio wave path loss and increasing radio wave transmission range in mmWave, support for dynamic operation of parameter sets (e.g., operating multiple subcarrier spacings) and time slot formats for efficient utilization of mmWave resources, initial access technology supporting multi-beam transmission and broadband, definition and operation of bandwidth parts (BWPs), new channel coding methods (such as low-density parity-check (LDPC) codes for large-scale data transmission and polar codes for highly reliable transmission of control information), layer 2 pre-processing, and network slicing for providing dedicated networks dedicated to specific services.

[0004] Currently, discussions are underway on improvements and performance enhancements to initial 5G mobile communication technologies in view of the services they are to support, and there is already standardization of physical layers for technologies such as Vehicle-to-Everything (V2X) for assisting driving determination of autonomous vehicles based on information about the position and status of vehicles transmitted by the vehicles and for enhancing user convenience, New Radio Unlicensed (NR-U) designed to enable system operation in unlicensed bands to comply with various regulatory requirements, NR User Equipment (UE) power saving, Non-Terrestrial Network (NTN) for UE-satellite direct communication for providing coverage in areas where communication with terrestrial networks is unavailable, and positioning.

[0005] Furthermore, in the area of ​​radio interface architecture / protocols, standardization is underway on technologies such as the Industrial IoT (IIoT) for supporting new services through interworking and integration with other industries, IAB (Integrated Access and Backhaul) for providing nodes for network service area expansion by integrating wireless backhaul links and access links, mobility enhancements including conditional handover and dual-active protocol stack (DAPS) handover, and two-step random access (NR two-step RACH) for simplifying the random access procedure. In terms of system architecture / services, standardization is also underway on the following: a 5G baseline architecture (e.g., a service-based architecture or service-based interface) for combining network function virtualization (NFV) and software-defined networking (SDN) technologies, and mobile edge computing (MEC) for receiving services based on UE location.

[0006] If such 5G mobile communication systems are commercialized, the already exponentially growing number of connected devices will be connected to the communication network, and it is therefore expected that enhanced functionality and performance of the 5G mobile communication system and the integrated operation of connected devices will be necessary. To this end, new research is planned related to: extended reality (XR) for effectively supporting augmented reality (AR), virtual reality (VR), mixed reality (MR), etc.; improving 5G performance and reducing 5G complexity by utilizing artificial intelligence (AI) and machine learning (ML); AI service support; metaverse service support; and drone communication.

[0007] Furthermore, such developments in 5G mobile communication systems will serve as the foundation for the development of not only new waveforms for providing terahertz band coverage for 6G mobile communication technology, multi-antenna transmission technologies (such as full-dimensional MIMO (FD-MIMO), array antennas, and massive antennas), metamaterial-based lenses and antennas for improving terahertz band signal coverage, high-dimensional spatial multiplexing technologies using orbital angular momentum (OAM), and reconfigurable smart surfaces (RIS), but also full-duplex technologies for increasing the frequency efficiency of 6G mobile communication technology and improving system networks, AI-based communication technologies for achieving system optimization by leveraging satellites and AI (artificial intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technologies for implementing services at a complexity level that exceeds the operational capabilities of UEs by utilizing ultra-high-performance communication and computing resources.

[0008] The UE of a communication system to which the present disclosure applies includes various communication modules. These modules can transmit and receive necessary data via their connected antennas. Different communication systems utilize different frequency bands. However, when communication systems utilize adjacent frequency bands, interference may occur between communication modules. Therefore, a method and apparatus for mitigating interference are needed. Summary of the Invention

[0009] Technical issues

[0010] The present disclosure is intended to address the aforementioned issues, and one aspect of the present disclosure is to provide a method and apparatus for controlling interference that may occur between communication modules in a wireless communication system. In particular, the present disclosure proposes a method and apparatus for resolving interference issues in a Multiple Universal Subscriber Identity Module (MUSIM) environment.

[0011] The technical subjects pursued in the embodiments of the present disclosure may not be limited to the above-mentioned technical subjects, and other technical subjects not mentioned herein may be clearly understood by those skilled in the art to which the present disclosure pertains from the following description.

[0012] Solution to the problem

[0013] According to one aspect of the present disclosure, a method performed by a terminal supporting multiple SIMs (Multi-Universal Subscriber Identity Module: MUSIM) in a wireless communication system includes: receiving a configuration to transmit MUSIM-related UE assistance information from a first network associated with a first SIM; identifying a frequency band affected by a second network associated with a second SIM; and transmitting a UE assistance information message including information about the frequency band affected by the second network to the first network associated with the first SIM.

[0014] According to one aspect of the present disclosure, a method performed by a first network associated with a first SIM in a wireless communication system includes: performing configuration to transmit MUSIM-related UE assistance information to a terminal supporting multiple SIMs (Multi-Universal Subscriber Identity Module: MUSIM); and receiving, from the terminal, a UE assistance information message including information about a frequency band affected by a second network associated with a second SIM.

[0015] According to one aspect of the present disclosure, a terminal supporting multiple SIMs (Multi-Universal Subscriber Identity Module: MUSIM) in a wireless communication system includes a transceiver configured to transmit and receive signals and a controller, wherein the controller is configured to transmit MUSIM-related UE assistance information from a first network associated with a first SIM, identify a frequency band affected by a second network associated with a second SIM, and transmit a UE assistance information message including information about the frequency band affected by the second network to the first network associated with the first SIM.

[0016] According to one aspect of the present disclosure, a first network associated with a first SIM in a wireless communication system includes a transceiver configured to transmit and receive signals and a controller, wherein the controller performs configuration to transmit MUSIM-related UE assistance information to a terminal supporting multiple SIMs (Multi-Universal Subscriber Identity Module: MUSIM), and receive a UE assistance information message from the terminal, the UE assistance information message including information about a frequency band affected by a second network associated with a second SIM.

[0017] Advantageous Effects of the Invention

[0018] According to the embodiments of the present disclosure, the IDC problem in the MUSIM environment can be effectively solved. Specifically, when a MUSIM UE is provided with services from two or more networks, the UE can smoothly perform standby mode or connected mode operations from the two or more networks.

[0019] Advantageous effects obtainable from the present disclosure may not be limited to the above-mentioned effects, and other effects not mentioned herein may be clearly understood from the following description by those skilled in the art to which the present disclosure pertains. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1a The structure of a next-generation mobile communication system according to an embodiment of the present disclosure is shown.

[0021] Figure 1b shows transitions between wireless connection states in a next generation mobile communication system according to an embodiment of the present disclosure;

[0022] Figure 1c A UE supporting multiple subscriber identity modules (SIMs) according to an embodiment of the present disclosure is shown;

[0023] Figure 1d In-device coexistence (IDC) according to an embodiment of the present disclosure is shown;

[0024] Figure 1e Schematically illustrates a frequency band adjacent to the ISM band among frequencies used for 3GPP mobile communications according to an embodiment of the present disclosure;

[0025] Figure 1f is a flowchart illustrating a process for reporting predetermined information indicating UE preference to a base station in a mobile communication system according to an embodiment of the present disclosure;

[0026] Figure 1g A scenario is shown in which a UE communicating with multiple SIMs simultaneously experiences an IDC problem according to an embodiment of the present disclosure;

[0027] Figure 1his a flowchart illustrating the operation of a UE according to a process for resolving an IDC problem of a UE communicating with multiple SIMs simultaneously, according to an embodiment of the present disclosure;

[0028] Figure 1i is a flowchart illustrating the operation of a base station according to a process for resolving an IDC problem of a UE communicating with multiple SIMs simultaneously, according to an embodiment of the present disclosure;

[0029] Figure 1j is a block diagram illustrating an internal structure of a UE according to an embodiment of the present disclosure.

[0030] Figure 1k is a block diagram illustrating a structure of a base station according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] When describing the embodiments in the specification, descriptions related to technical contents that are well known in the art and not directly related to the present disclosure will be omitted. Such unnecessary omissions are intended to prevent the main idea of ​​the present disclosure from being obscured and to more clearly transfer the main idea.

[0032] For the same reason, some elements may be exaggerated, omitted or schematically shown in the accompanying drawings. Moreover, the size of each element does not fully reflect the actual size. In the various drawings, the same reference numerals are used to mark the same or equivalent elements.

[0033] The advantages and features of the present disclosure and the manner in which they are achieved will be apparent by reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments set forth below, but may be implemented in a variety of different forms. The following embodiments are provided only to fully disclose the present disclosure and to inform those skilled in the art of the scope of the present disclosure, and the present disclosure is limited only by the scope of the appended claims. Throughout the specification, the same or similar reference numerals represent the same or similar elements.

[0034] In this document, it will be understood that each block of the flowchart diagram and the combination of blocks in the flowchart diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device create a device for implementing the functions specified in one or more flowchart blocks. These computer program instructions can also be stored in a computer-usable or computer-readable memory, which can instruct the computer or other programmable data processing device to act in a specific manner so that the instructions stored in the computer-usable or computer-readable memory produce an article of manufacture including an instruction device that implements the functions specified in one or more flowchart blocks. The computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are performed on the computer or other programmable device to produce a computer-implemented process so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flowchart blocks.

[0035] In addition, each block in the flow chart may represent a module, segment or portion of code that includes one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative embodiments, the functions marked in the blocks may not occur in order. For example, two blocks shown in succession may actually be executed substantially simultaneously, or the blocks may sometimes be executed in reverse order, depending on the functions involved.

[0036] As used in the embodiments of the present disclosure, the term "unit" refers to a software element or a hardware element, such as a field programmable gate array (FPGA) or an application-specific integrated circuit (ASIC), and a "unit" can perform certain functions. However, "unit" does not always have a meaning limited to software or hardware. A "unit" can be configured to be stored in an addressable storage medium or to execute one or more processors. Therefore, a "unit" includes, for example, a software element, an object-oriented software element, a class element or a task element, a process, a function, a property, a procedure, a subroutine, a program code segment, a driver, firmware, microcode, a circuit, data, a database, a data structure, a table, an array, and a parameter. The elements and functions provided by a "unit" can be combined into a smaller number of elements or "units" or divided into a larger number of elements or "units". In addition, elements and "units" can be implemented as one or more CPUs within a reproduction device or a secure multimedia card.

[0037] In describing the present disclosure below, detailed descriptions of known functions or configurations will be omitted when it is determined that the description may make the subject matter of the present disclosure unnecessarily unclear. Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0038] Figure 1a The structure of a next-generation mobile communication system according to an embodiment of the present disclosure is shown.

[0039] refer to Figure 1a As shown therein, the radio access network of the next generation mobile communication system (New Radio, NR) includes a next generation base station (New Radio Node B, hereinafter referred to as gNB) 1a-10 and an access and mobility management function (AMF) 1a-05. User equipment (New Radio User Equipment, hereinafter referred to as NR UE or NR terminal) 1a-15 accesses external networks via the gNB 1a-10 and AMF 1a-05.

[0040] exist Figure 1a In LTE, gNB corresponds to the evolved Node B (eNB) of the traditional LTE system. gNB can connect to NR UEs through radio channels and provide superior services compared to traditional Node Bs.

[0041] In next-generation mobile communication systems, since all user traffic is served over shared channels, a device is required to collect status information (such as the UE's buffer status, available transmit power, and channel conditions) and perform scheduling accordingly. gNBs 1a-10 serve as this device. Typically, a single gNB controls multiple cells. To achieve ultra-high-speed data transmission exceeding the current LTE, next-generation mobile communication systems can provide bandwidths wider than the existing maximum bandwidth, employ orthogonal frequency division multiplexing (OFDM) as a radio access technology, and integrate beamforming technology. Furthermore, next-generation mobile communication systems employ adaptive modulation and coding (AMC) schemes to determine the modulation scheme and channel coding rate based on the UE's channel conditions.

[0042] The AMF 1a-05 performs functions such as mobility support, bearer configuration, and QoS configuration. The AMF is responsible for various control functions and UE mobility management functions and is connected to multiple base stations. Furthermore, the next-generation mobile communication system can interoperate with the existing LTE system, and the AMF is connected to the MME 1a-25 via a network interface. The MME is connected to the eNB 1a-30, which is an existing base station. A UE supporting LTE-NR dual connectivity can transmit and receive data while maintaining connections with both the gNB and the eNB.

[0043] Figure 1b Transitions between wireless connection states in a next generation mobile communication system according to an embodiment of the present disclosure are shown.

[0044] Next-generation mobile communication systems can have three radio connection states (RRC states). Connected mode (RRC_CONNECTED) 1b-05 is a radio connection state in which the UE can send and receive data. Idle mode (RRC_IDLE) 1b-30 is a radio connection state in which the UE monitors whether paging is being sent to the UE. These two modes are also used in existing LTE systems, and the specific technologies used are the same.

[0045] In the next generation mobile communication system, a new inactive (RRC_INACTIVE) radio connection state 1b-15 is defined. In this radio connection state, the UE context is maintained in the base station and the UE, and RAN-based paging is supported. The features of the new radio connection state are listed below.

[0046] -Cell reselection mobility;

[0047] - A CN-NR RAN connection (both C / U-plane) has been established for the UE;

[0048] - The UE AS context is stored in at least one gNB and the UE;

[0049] -Paging is initiated by NR RAN;

[0050] -RAN-based notification areas are managed by the NR RAN;

[0051] - The NR RAN is aware of the RAN-based notification area to which the UE belongs;

[0052] The new inactive radio connection state can transition to connected mode or standby mode according to a specific procedure. Inactive mode transitions to connected mode according to a resume procedure, and connected mode transitions to inactive mode according to a release procedure that includes suspend configuration information (1b-10). This procedure includes one or more operations in which one or more RRC messages are sent and received between the UE and the base station. In addition, inactive mode can transition to standby mode through a release procedure after the resume procedure (1b-20). The transition between connected mode and standby mode follows existing LTE technology. That is, the transition between modes is performed through an establishment or release procedure (1b-25).

[0053] Figure 1c A UE supporting multiple Subscriber Identity Modules (SIMs) according to an embodiment of the present disclosure is shown.

[0054] A SIM is a device that stores information about a mobile communication subscriber, and a UE can register with and access a network provided by a service provider to which the subscriber has subscribed by using the information stored in the device. A multi-SIM (MUSIM) UE 1c-15 according to an embodiment of the present disclosure is a UE that supports two or more SIMs 1c-20 and 1c-25. The multi-SIM UE can operate in a first mode (hereinafter, "dual SIM dual standby (DSDS) mode") or a second mode (hereinafter, "dual SIM dual active (DSDA) mode"). The DSDS mode and the DSDA mode can be defined as follows.

[0055] DSDS (Dual SIM Dual Standby): Both SIMs can be used for idle mode network connections, but when the radio connection (1c-05) is active, the second connection (1c-10) is disabled. As in the passive case, the SIMs in a DSDS device share a single transceiver. Through time division multiplexing, both radio connections are maintained in idle mode. While a call is active on one SIM's network, it is no longer possible to maintain a radio connection to the second SIM's network, and therefore, that connection is unavailable for the duration of the call. Registration with the second network is maintained.

[0056] -DSDA (Dual SIM Dual Active): Both SIMs can be used in both idle and connected modes. Each SIM has a dedicated transceiver, which means there is no mutual dependency on idle or connected mode operation at the modem level.

[0057] When a UE supporting multiple SIMs has a single RF chain (or transceiver), conflicts may occur when transmitting and receiving data with the first network corresponding to the first SIM and receiving paging from the second network corresponding to the second SIM in connected mode. Consequently, in this situation, it may be difficult to monitor paging sent from the second network corresponding to the second SIM or perform other standby mode operations (e.g., receiving system information or PWS information and TAU). TAU is a process for re-registering the paging area periodically or when the UE reselects a cell with a different TA and needs to connect to the network. This requires the UE to perform transmission and reception procedures with the network. Therefore, the UE can perform TAU operations independently of transmission and reception via other networks. Here, RF chain is a term commonly used in the communications field and refers to the collection of RF modules (antennas, amplifiers, converters / decoders, and filters) required for data transmission and reception.

[0058] When a UE supports two RF chains, it can simultaneously receive services from two networks corresponding to different SIM cards without the aforementioned problems. However, when a UE supporting two RF chains uses both RF chains, because CA / DC is configured in the network corresponding to one SIM card, a method for smoothly performing standby mode or connected mode operation in the other network is still needed. Therefore, to solve this problem, multiple solutions have been introduced in next-generation mobile communication systems.

[0059] For example, when the paging patterns of the respective networks to be monitored completely or partially overlap, making it difficult to monitor paging from either network, the UE may request a change in the UE ID from the network, thereby changing the paging pattern derived from the UE ID. While performing data transmission and reception operations in connected mode with one network, the UE may need to monitor paging periodically sent from another network. Here, the network requesting connected mode may configure predetermined periodic or aperiodic gaps for monitoring paging. When switching to connected mode with another network due to paging received from another network is required, the existing network in connected mode may request disconnected mode. Here, the paging may include a predetermined indicator indicating a predetermined service (e.g., a voice call). To request the aforementioned configuration of gaps or disconnected mode, the UE may send a UEAssistanceInformation message including relevant information (musim-Assistance) to the base station.

[0060] Standby mode operation refers to monitoring and reception of paging, reception of system information, reception of Public Warning System (PWS) information, Tracking Area Update (TAU), etc. Connected mode operation means that the UE performs data transmission and reception operations with the base station.

[0061] Figure 1d An in-device coexistence (IDC) technique according to an embodiment of the present disclosure is illustrated.

[0062] In-device coexistence (IDC) is a technology used to minimize interference between multiple communication modules within a device. Recent UEs have various functions and incorporate various communication modules to support these functions. In addition to the NR communication module 1d-00, a GPS module 1d-05 and short-range communication modules 1d-10, such as Bluetooth and wireless LAN modules, may also be present. These modules can transmit and receive necessary data via connected antennas 1d-15, 1d-20, and 1d-25, respectively.

[0063] Communication systems use different frequency bands. However, when communication systems use adjacent frequency bands, interference may occur between communication modules because it is impossible to perfectly separate the signals transmitted and received between the frequency bands. In addition, each communication module and the antenna connected to it are included in a single UE device and are therefore located very close to each other. As a result, significant interference may occur between them.

[0064] Therefore, in order to mitigate interference, it is necessary to control the transmission power between communication modules. For example, when a short-range communication module 1d-10 such as a Bluetooth or wireless LAN module attempts to receive data in an NR uplink, the transmission signal of the NR communication module 1d-00 may interfere with the short-range communication module. In addition, the NR uplink signal may interfere with other NR frequencies or frequencies of other mobile communication systems. In order to mitigate interference, the maximum uplink transmission power of the NR communication module can be limited to control the amount of interference. Alternatively, the operation of the NR communication module can be temporarily suspended to eliminate the amount of interference power affecting the short-range communication module. Conversely, the short-range communication module 1d-10 may interfere with the received signal of the NR communication module 1d-00 in the NR downlink.

[0065] Figure 1e A frequency band adjacent to an ISM band among frequencies used for 3GPP mobile communications according to an embodiment of the present disclosure is schematically illustrated.

[0066] When a mobile communication cell uses frequency band 40 1e-05, interference becomes serious when a wireless LAN uses channel 1, and when a mobile communication cell uses frequency band 7 UL 1e-10, interference becomes serious when a wireless LAN channel uses channel 13 or 14. Therefore, a method of appropriately avoiding interference when interference occurs is needed.

[0067] In a conventional next-generation mobile communication system, the UE may report a UEAssistanceInformation message to the base station according to the configuration of the base station. The UEAssistanceInformation message includes information about NR frequencies that give an impact or are affected by IDC problems (affectedCarrierFreqList field), information about NR frequencies that provide IDC interference due to inter-modulation distortion and harmonics of an uplink NR signal configured with carrier aggregation (CA) (affectedCarrierFreqCombList field), and information required to avoid IDC problems (IDC-Assistance), such as information about heterogeneous communication modules including GPS, BT, and WLAN modules that are affected by interference.

[0068] In a MUSIM scenario, a UE in a DSDA state with two SIM networks can perform data transmission and reception operations by assigning an RF chain to each SIM network. In this case, IDC interference may occur between the RF chains assigned to the respective SIM networks. This disclosure proposes a method for avoiding IDC interference between the RF chains assigned to the respective SIM networks in a MUSIM scenario.

[0069] Figure 1f is a flowchart illustrating a process for reporting predetermined information indicating UE preference to a base station in a mobile communication system according to an embodiment of the present disclosure.

[0070] In a NR mobile communication system, the UE can report its preference to the base station compared to the current configuration. An example is shown below.

[0071] -Optimize delay budget

[0072] - Preference for reduced power consumption (UE power preference)

[0073] - Preference for overheat reduction (overheat assist)

[0074] -IDC problem reporting and preferred solutions (IDC assistance)

[0075] -MUSIM problem reporting and preferred solutions (MUSIM Assist)

[0076] Upon receiving the aforementioned preferences, the base station may trigger a reconfiguration in response. For example, upon receiving a preference for reduced power consumption, reduced latency, and reduced overheating, the base station may perform a reconfiguration by reducing or increasing the DRX cycle.

[0077] The UE can report its preferred delay budget and preference for overheating reduction to the base station. Furthermore, the UE can report in more detail its preferred reconfiguration options for overheating or power consumption reduction. Here, the UE can indicate the maximum number of SCells, the aggregate frequency bandwidth (BW), and the maximum number of MIMO layers preferred by the UE.

[0078] As described above, the UE may report an IDC problem or a MUSIM problem to the network to avoid the IDC problem or the MUSIM problem, and may report solution information for avoiding the problem.

[0079] The procedure for reporting the aforementioned preferences is as follows.

[0080] In operation 1f-15, UE 1f-05 may report the capability of reporting each preference to base station 1f-10.

[0081] In operation 1f-20, the base station 1f-10 may configure the UE to report each preference to the base station at a necessary time based on the capability information.

[0082] In operation 1f-25, UE 1f-05 may report the UE's preference to the base station at a necessary time by using a UEAssistanceInformation message. For example, when the UE wants to avoid IDC problems and MUSIM problems, the UE may send a UEAssistanceInformation message including IDC-Assistance and MUSIM-Assistance to the base station.

[0083] The IDC-Assistanc information described in TS38.331 is as follows:

[0084] [Table 1]

[0085]

[0086] The interferenceDirection field included in the AffectedCarrierFreq IE is used to indicate the direction in which IDC interference is applied. For example, when this field has the value NR, it indicates that the system affected by the IDC interference is an NR system. When this field has the value other, it indicates that the system affected by the IDC interference is a system other than the NR system.

[0087] The victimSystemType field included in the AffectedCarrierFreqComb IE is used to indicate the type of system that is victimized by the IDC interference generated by the NR system with configured uplink CA. For example, the value of WLAN indicates a WLAN system, and the value of Bluetooth indicates a Bluetooth system.

[0088] Therefore, the UE may not indicate IDC interference between NR frequencies by using the existing IDC assistance.

[0089] The MUSIM assistance information described in TS38.331 is as follows.

[0090] [Table 2]

[0091]

[0092] The musim-PreferredRRC-State field is used to indicate the RRC state preferred by the UE when releasing the current connected mode to resolve the MUSIM issue.

[0093] The musim-GapPreferenceList field is used to report the UE's preferred gap configuration information to solve the MUSIM problem.

[0094] Figure 1g A scenario is shown in which a UE communicating with multiple SIMs simultaneously experiences an IDC problem according to an embodiment of the present disclosure.

[0095] When a UE is simultaneously connected to two SIM networks and performing data transmission and reception operations, IDC interference may occur between the RF chains corresponding to the respective SIM networks. For example, an uplink signal transmitted by RF chain 1g-15 corresponding to the first SIM network 1g-05 may be received by RF chain 1g-20 corresponding to the second SIM network 1g-10. Alternatively, the uplink signal may affect another wireless system operating to support the second SIM network (e.g., GPS 1g-25). In other words, the transmission signal of the first SIM network may cause IDC interference to the second SIM network.

[0096] This embodiment proposes a method in which the UE reports IDC assistance or MUSIM assistance with predetermined new information added to a predetermined SIM network to avoid IDC interference between RF chains corresponding to respective SIM networks. The SIM network is an NR or EUTRA system.

[0097] Because the UE is connected to two SIM networks, it can send UEAssistanceInformation including IDC assistance or MUSIM assistance to one or both SIM networks. Therefore, when the uplink signal transmitted by the RF chain corresponding to the first SIM network causes IDC interference to the downlink of the RF chain corresponding to the second SIM network or to the downlink of another wireless system (e.g., GPS) operating to support the second SIM network, the following scenario can be considered to resolve the IDC issue. The term "GPS" below refers to a heterogeneous system that does not include NR or EUTRA systems. That is, in this embodiment, WLAN or Bluetooth systems can be considered instead of GPS.

[0098] - Scenario 1: UE sends IDC assistance to SIM1 to avoid IDC issues with GPS

[0099] - Scenario 2: UE sends IDC assistance to SIM1 to avoid IDC issues on NR RF#2 (SIM2)

[0100] - Scenario 3: UE sends MUSIM assistance to SIM1 to avoid IDC issues with GPS

[0101] - Scenario 4: UE sends MUSIM assistance to SIM1 to avoid IDC issues for NR RF#2 (SIM2)

[0102] - Scenario 5: UE sends IDC assistance to SIM2 to avoid IDC issues with GPS

[0103] - Scenario 6: UE sends IDC assistance to SIM2 to avoid IDC issues from NR RF#1 (SIM1)

[0104] - Scenario 7: UE sends MUSIM assistance to SIM2 to avoid IDC issues with GPS

[0105] - Scenario 8: UE sends MUSIM assistance to SIM2 to avoid IDC issues from NR RF#1 (SIM1)

[0106] In each scenario, new information can be introduced into IDC assistance or MUSIM assistance to solve the IDC problem.

[0107] In scenario 1, even if GPS is used for another SIM network, the UE can report to the first SIM network that the first SIM network is causing IDC interference to GPS by using existing IDC assistance signaling. IDC assistance includes information about IDC interference to GPS.

[0108] For example, the UE may report IDC assistance information to the first SIM network, along with frequency information about the first SIM network causing IDC interference, where the interferenceDirection field is configured with a value of "other," or the victimSystemType field is configured with a value of "gps." Here, a new indicator indicating that the first SIM network's signal is interfering with the GPS operating for another SIM network may be included in the IDC assistance to notify the first SIM network of this situation. Upon receiving this information, the first SIM network may release its serving frequency causing IDC interference.

[0109] In scenario 2, the UE reports to the first SIM network that the signal of the first SIM network is causing IDC interference to the second SIM network by using IDC assistance signaling. The following options may be considered for reporting.

[0110] - Option 1: A new cause value (ie, nrForOtherSIM) for indicating that the signal of the first SIM network is causing IDC interference to the second SIM network is added to the victimSystemType field.

[0111] Option 2: Frequency information about the victim SIM (e.g., ARFCN-ValueNR or ARFCN-ValueUTRA list) is newly added to the IDC-Assistance IE. Frequency range information about the victim SIM affected by IDC interference can be added. The frequency range can be indicated by starting frequency / band, center frequency / band, or starting frequency / ending frequency information. PLMN information about the victim SIM can also be included in the IDC-Assistance IE.

[0112] - Option 3: A new indicator is added to indicate that the frequency indicated by carrierFreq of the AffectedCarrierFreq IE is a frequency causing IDC interference, and the interferenceDirection field is configured to the value of nr.

[0113] - Option 4: A new cause value (ie, nrForOtherSIM) is added to the interferenceDirection field indicating that the signal of the first SIM network is causing IDC interference to the second SIM network.

[0114] Upon receiving this information, the first SIM network may release its service frequency that causes IDC interference.

[0115] In scenario 3, even if GPS is used for another SIM network, the UE can report to the first SIM network that the first SIM network is causing IDC interference to GPS by using existing MUSIM assistance signaling. That is, MUSIM assistance signaling is recycled to resolve the IDC problem.

[0116] For example, to avoid IDC interference, the UE may request the first SIM network to release the connection or configure periodic / aperiodic gaps. Here, a new indicator indicating that the first SIM network's signal is interfering with the GPS operating for another SIM network may be included in MUSIM assistance to notify the first SIM network of this situation. Upon receiving this information, the first SIM network may release its serving frequency that caused IDC interference or reconfigure the predetermined periodic / aperiodic gaps.

[0117] In scenario 4, the UE can use MUSIM assistance signaling to report to the first SIM network that the signal of the first SIM network is causing IDC interference to the second SIM network. In other words, MUSIM assistance signaling is recycled to resolve the IDC problem.

[0118] For example, to avoid IDC interference, the UE may request the first SIM network to release the connection or configure periodic / aperiodic gaps. Here, a new indicator indicating that the first SIM network's signal is causing interference to another SIM network may be included in the MUSIM-Assistance IE to notify the first SIM network of this situation. Alternatively, frequency information about the victim SIM (e.g., ARFCN-ValueNR or ARFCN-ValueEUTRA list) may be added to the MUSIM-Assistance IE. Information about the frequency range of the victim SIM affected by IDC interference may be added. The frequency range may be indicated by a starting frequency / band, a center frequency / band, or starting / ending frequency information. PLMN information about the victim SIM may also be included in the MUSIM-Assistance IE. Upon receiving this information, the first SIM network may release its serving frequency that caused the IDC interference or reconfigure the predetermined periodic / aperiodic gaps.

[0119] In scenario 5, the UE uses IDC assistance signaling to report to the second SIM network that the first SIM network's signal is causing IDC interference to the GPS supporting the second SIM network. Because the first SIM network, rather than the second SIM network, is causing IDC interference to the GPS, the second SIM network's operation based on this IDC assistance information may be severely limited. However, this information allows the second SIM network to at least identify the reason why location information via the pre-defined GPS is not being correctly reported and can eliminate unnecessary GPS configuration. The following options can be considered for reporting.

[0120] - Option 1: The victimSystemType field is configured as gps, and frequency information about the aggressor SIM (ie, the first SIM network) is included in the AffectedCarrierFreqComb IE. Here, a new indicator is added indicating that the frequency indicated by carrierFreq of the AffectedCarrierFreqComb IE is a frequency causing IDC interference.

[0121] Option 2: Frequency information about the aggressor SIM (e.g., ARFCN-ValueNR or ARFCN-ValueUTRA list) is newly added to the IDC-Assistance IE. Frequency range information about the aggressor SIM causing IDC interference may be added. The frequency range may be indicated by starting frequency / band, center frequency / band, or starting frequency / ending frequency information. PLMN information about the aggressor SIM may also be included in the IDC-Assistance IE.

[0122] - Option 3: A new indicator indicating that the frequency indicated by carrierFreq of the AffectedCarrierFreq IE is the frequency of another SIM network is added, and the interferenceDirection field is configured with a value of other.

[0123] In scenario 6, the UE reports to the second SIM network that the signal of the first SIM network is causing IDC interference to the second SIM network by using IDC assistance signaling. The following options may be considered for reporting.

[0124] - Option 1: A new cause value (i.e., nr) is added to the victimSystemType field to indicate that the signal of the first SIM network is causing IDC interference to the second SIM network. Frequency information about the victim SIM (i.e., the second SIM network) is included in the AffectedCarrierFreqComb IE.

[0125] Option 2: Frequency information about the aggressor SIM (e.g., ARFCN-ValueNR or ARFCN-ValueUTRA list) is newly added to the IDC-Assistance IE. Frequency range information about the aggressor SIM causing IDC interference may also be added. The frequency range may be indicated by starting frequency / band, center frequency / band, or starting / ending frequency information. PLMN information about the aggressor SIM may also be included in the IDC-Assistance IE.

[0126] - Option 3: A new indicator indicating that the frequency indicated by carrierFreq of the AffectedCarrierFreq IE is a frequency receiving IDC interference from another SIM network is added, and the interferenceDirection field is configured with a value of nr.

[0127] - Option 4: A new cause value (i.e., nrForThisSIM) is added to the interferenceDirection field to indicate that the signal of the first SIM network is causing IDC interference to the second SIM network. Here, frequency information about the victim SIM (i.e., the second SIM network) is included in the carrierFreq field of the AffectedCarrierFreq IE.

[0128] Upon receiving this information, the second SIM network may release its serving frequency receiving IDC interference.

[0129] In scenario 7, the UE uses MUSIM assistance signaling to notify the second SIM network that the first SIM network's signals are causing IDC interference to the GPS supporting the second SIM network. Because the first SIM network, rather than the second SIM network, is causing IDC interference to the GPS, the second SIM network's operation based on the MUSIM assistance information may be severely limited. However, this information allows the second SIM network to at least identify the reason why location information via the pre-configured GPS is not being correctly reported and to eliminate unnecessary GPS configuration. To this end, a new indicator indicating that the first SIM network's signals are causing IDC interference to the GPS supporting the second SIM network may be included in the MUSIM assistance to notify the second SIM network of this situation. Alternatively, frequency information about the aggressor SIM (e.g., ARFCN-ValueNR or ARFCN-ValueUTRA list) may be added to the MUSIM-Assistance IE. Frequency range information about the aggressor SIM affected by the IDC interference may also be included. The frequency range may be indicated by a starting frequency / band, a center frequency / band, or a starting / ending frequency information. PLMN information about the aggressor SIM may also be included in the MUSIM-Assistance IE.

[0130] In scenario 8, the UE can use MUSIM assistance signaling to report to the second SIM network that the signal of the first SIM network is causing IDC interference to the second SIM network. In other words, MUSIM assistance signaling is recycled to resolve the IDC problem.

[0131] For example, to avoid IDC interference, the UE may request the second SIM network to release the connection or configure periodic / aperiodic gaps. Here, a new indicator indicating that the signal of another SIM network is causing interference may be included in the MUSIM-Assistance to notify the second SIM network of this situation. Alternatively, frequency information about the victim SIM (e.g., ARFCN-ValueNR or ARFCN-ValueEUTRA list) may be added to the MUSIM-Assistance IE. Frequency range information about the victim SIM affected by IDC interference may also be added. The frequency range may be indicated by a starting frequency / band, a center frequency / band, or a starting frequency / ending frequency information. PLMN information about the victim SIM may also be included in the MUSIM-Assistance IE. Upon receiving this information, the second SIM network may release its serving frequency that receives IDC interference or may reconfigure a predetermined periodic / aperiodic gap.

[0132] In another embodiment, when an uplink signal transmitted by an RF chain corresponding to a first SIM network causes IDC interference to a downlink of an RF chain corresponding to a second SIM network or a downlink of another wireless system (e.g., GPS) operating to support the second SIM network, the UE may report an indicator indicating that there is a problem in hardware sharing due to the IDC interference to the first SIM network or the second SIM network.

[0133] Figure 1h is a flowchart illustrating the operation of a UE according to a process for resolving an IDC problem of a UE communicating with multiple SIMs simultaneously, according to an embodiment of the present disclosure.

[0134] In operation 1h-05, the UE supports multi-SIM functionality and is in a mode of being connected to two SIM networks simultaneously. The UE can allocate one RF chain to each network to be connected to multiple SIM networks.

[0135] In operations 1h-10, the UE may report capability information about the UE to each SIM network. The capability information may include an indicator indicating whether the UE supports simultaneous data transmission and reception with multiple SIM networks in a MUSIM environment, and an indicator indicating whether the UE is capable of reporting an IDC problem via IDC assistance or MUSIM assistance when an IDC problem occurs between RF chains corresponding to each SIM network in the MUSIM environment.

[0136] In operations 1h-15, the UE may receive an RRCReconfiguration message from each SIM network. The OtherConfig IE of the RRC message may include configuration information for idc-AssistanceConfig or musim-AssistanceConfigure, each of which may include a corresponding prohibition timer to prevent frequent transmission of report signaling. In addition, each configuration information may include an indicator indicating whether the UE can report an IDC problem when an IDC problem occurs between RF chains corresponding to respective SIM networks in a MUSIM environment.

[0137] The CandidateServingFreqListNR IE is included in the idc-AssistanceConfig configuration information and is used to indicate frequency information for reporting IDC issues. The IE typically includes the current serving frequency or candidate serving frequencies (which can be used as future serving frequencies). Therefore, when a first SIM network configures IDC reporting for a specific UE, the first SIM network will not include frequencies operated by another SIM network in the IE. In other words, when IDC interference occurs between RF chains corresponding to the SIM networks, if the frequency causing or receiving the IDC interference is a frequency of the other SIM network, that frequency is not reported to the network. Therefore, in this embodiment, when IDC interference occurs between RF chains corresponding to the SIM networks, frequencies not included in the CandidateServingFreqListNR IE are allowed to be reported to the network.

[0138] In operation 1h-20, the UE may recognize that IDC interference occurs between RF chains corresponding to the SIM network.

[0139] In operations 1h-25, the UE may determine, according to predetermined rules, a SIM network among the SIM networks involved in the IDC interference, to which the UE reports IDC assistance or MUSIM assistance information. For example, when the UE is receiving a more important service (e.g., a voice call service) from one of the two SIM networks, the UE may send IDC assistance or MUSIM assistance information to the SIM network providing a relatively less important service. The reason for reporting the information is to request the SIM network receiving the information to change the existing configuration in order to resolve the IDC problem. Therefore, reporting information to the SIM network providing a relatively less important service is a method for maintaining the quality and continuity of important services. The UE may also report IDC assistance or MUSIM assistance information to all SIM networks involved in the IDC interference. When interference is detected, the UE may configure only one of idc-AssistanceConfig and musim-AssistanceConfig. In this case, the UE needs to report the configured assistance information.

[0140] In operation 1h-30, when it is determined to report predetermined assistance information to the first SIM network, the UE may set suggestion information related to the IDC problem.

[0141] In operation 1h-35, the UE may report a UEAssistanceInformation message including assistance information to the first SIM network.

[0142] In operation 1h-40, when determining to report the assistance information to the second SIM network, the UE may set suggestion information related to the IDC problem.

[0143] In operation 1h-45, the UE may report a UEAssistanceInformation message including assistance information to the second SIM network.

[0144] Figure 1i is a flowchart illustrating the operation of a base station according to a process for resolving an IDC problem of a UE that communicates with multiple SIMs simultaneously, according to an embodiment of the present disclosure.

[0145] At operation 1i-05, the base station may receive capability information about the UE from the UE. The capability information may include an indicator indicating whether the UE supports simultaneous data transmission and reception with multiple SIM networks in a MUSIM environment, and an indicator indicating whether the UE is capable of reporting an IDC problem via IDC assistance or MUSIM assistance when an IDC problem occurs between RF chains corresponding to respective SIM networks in the MUSIM environment.

[0146] In operation 1i-10, the base station may include configuration information of idc-AssistanceConfig or musim-AssistanceConfig in the OtherConfig IE of the RRC message. Each configuration information may include a corresponding prohibition timer to prevent frequent transmission of report signaling. In addition, each configuration information may include an indicator indicating whether the UE can report an IDC problem when an IDC problem occurs between RF chains corresponding to respective SIM networks in a MUSIM environment.

[0147] In operation 1i-15, the base station may receive a UEAssistanceInformation message including IDC assistance or MUSIM assistance information from the UE, the message indicating an IDC problem occurring between RF chains corresponding to respective SIM networks.

[0148] In operation 1i-20, the base station may recognize that an IDC problem is occurring in another SIM network through the received information.

[0149] In operation 1i-25, the base station may configure reconfiguration information to avoid IDC interference. For example, the base station may release frequencies affected by or causing IDC interference and reconfigure a new serving frequency for the UE. Alternatively, the base station may configure periodic / aperiodic gaps for the UE to avoid or mitigate the impact of IDC interference. During the gaps, the UE temporarily suspends data transmission and reception to eliminate IDC interference. In addition, the base station may configure a mode for disconnecting from the UE.

[0150] In operation 1i-30, the base station may transmit configured reconfiguration information to the UE.

[0151] Figure 1j is a block diagram illustrating an internal structure of a UE according to an embodiment of the present disclosure.

[0152] Referring to the accompanying drawings, the UE may include a radio frequency (RF) processor 1j-10, a baseband processor 1j-20, a memory 1j-30, and a controller 1j-40.

[0153] The RF processor 1j-10 can perform functions such as signal band conversion and amplification for transmitting / receiving signals through a radio channel. That is, the RF processor 1j-10 can up-convert the baseband signal provided by the baseband processor 1j-20 into an RF band signal, can transmit the RF band signal through an antenna, and can down-convert the RF band signal received through the antenna into a baseband signal.

[0154] For example, the RF processor 1j-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), and the like. Although only one antenna is shown in the drawings, the UE may include multiple antennas. In addition, the RF processor 1j-10 may include multiple RF chains. In addition, the RF processor 1j-10 may perform beamforming. For beamforming, the RF processor 1j-10 may adjust the phase and amplitude of signals transmitted / received through multiple antennas or antenna elements, respectively. In addition, the RF processor may perform MIMO and may receive multiple layers when performing MIMO operations.

[0155] The baseband processor 1j-20 can perform conversion functions between baseband signals and bit streams according to the system's physical layer specifications. For example, during data transmission, the baseband processor 1j-20 can encode and modulate the transmitted bit stream to generate complex symbols. Additionally, during data reception, the baseband processor 1j-20 can demodulate and decode the baseband signal provided by the RF processor 1j-10 to recover the received bit stream.

[0156] For example, when following the orthogonal frequency division multiplexing (OFDM) scheme, during data transmission, the baseband processor 10-20 can encode and modulate the transmitted bit string to generate complex symbols, map the complex symbols to subcarriers, and configure OFDM symbols through inverse fast Fourier transform (IFFT) operations and cyclic prefix (CP) insertion. In addition, during data reception, the baseband processor 1j-20 can separate the baseband signal provided from the RF processor 1j-10 at the OFDM symbol level, recover the signal mapped to the subcarrier through a fast Fourier transform (FFT) operation, and recover the received bit string through demodulation and decoding.

[0157] The baseband processor 1j-20 and the RF processor 1j-10 can send and receive signals as described above. Therefore, the baseband processor 1j-20 and the RF processor 1j-10 can be referred to as a transmitter, a receiver, a transceiver, or a communication unit. In addition, at least one of the baseband processor 1j-20 and the RF processor 1j-10 may include multiple communication modules to support a variety of different radio access technologies. In addition, at least one of the baseband processor 1j-20 and the RF processor 1j-10 may include different communication modules to process signals in different frequency bands. For example, different radio access technologies may include wireless LAN (e.g., IEEE 802.11), cellular networks (e.g., LTE), etc. In addition, different frequency bands may include ultra-high frequency (SHF) (e.g., 2NRHz) bands and millimeter wave (mmWave) (e.g., 60GHz) bands.

[0158] The memory unit 1j-30 can store basic programs, applications, and data such as configuration information for the operation of the primary base station. Specifically, the memory 1j-30 can store information about a second access node configured to perform wireless communication using a second radio access technology. In addition, the memory 1j-30 can provide the stored data upon request from the controller 1j-40.

[0159] The controller 1j-40 controls the overall operation of the UE. For example, the controller 1j-40 can send / receive signals through the baseband processor 1j-20 and the RF processor 1j-10. In addition, the controller 1j-40 records data in the memory 1j-30 and reads data from the memory 1j-30. To this end, the controller 1j-40 may include at least one processor. For example, the controller 1j-40 may include a communication processor (CP) configured to perform control for communication, and an application processor (AP) configured to control upper layers such as application programs.

[0160] Figure 1k is a block diagram illustrating a structure of a base station according to an embodiment of the present disclosure.

[0161] As shown in the figure, the base station may include an RF processor 1k-10, a baseband processor 1k-20, a backhaul communication unit 1k-30, a memory 1k-40 and a controller 1k-50.

[0162] The RF processor 1k-10 can perform functions for sending / receiving signals through a radio channel, such as signal band conversion and amplification. That is, the RF processor 1k-10 can up-convert the baseband signal provided from the baseband processor 1k-20 into an RF band signal, can send the RF band signal through the antenna, and can down-convert the RF band signal received through the antenna into a baseband signal. For example, the RF processor 1k-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, and an ADC. Although only one antenna is shown in the accompanying drawings, the first access node may include multiple antennas. In addition, the RF processor 1k-10 may include multiple RF chains. In addition, the RF processor 1k-10 can perform beamforming. For beamforming, the RF processor 1k-10 can adjust the phase and amplitude of the signals sent / received through multiple antennas or antenna elements, respectively. The RF processor can send one or more layers to perform downward MIMO operations.

[0163] The baseband processor 1k-20 may perform conversion functions between baseband signals and bit strings according to the physical layer specifications of the first radio access technology. For example, during data transmission, the baseband processor 1k-20 may encode and modulate the transmitted bit string to generate complex symbols. Furthermore, during data reception, the baseband processor 1k-20 may demodulate and decode the baseband signal provided by the RF processor 1k-10 to recover the received bit string.

[0164] For example, when following the OFDM scheme, during data transmission, the baseband processor 1k-20 can encode and modulate the transmitted bit string to generate complex symbols, can map the complex symbols to subcarriers, and can configure OFDM symbols through IFFT operations and CP insertion.

[0165] In addition, during data reception, the baseband processor 1k-20 can separate the baseband signal provided from the RF processor 1k-10 at the OFDM symbol level, can recover the signal mapped to the subcarrier through FFT operation, and can recover the received bit string through demodulation and decoding.

[0166] The baseband processor 1k-20 and the RF processor 1k-10 transmit and receive signals as described above. Therefore, the baseband processor 1k-20 and the RF processor 1k-10 can be called a transmitter, a receiver, a transceiver, or a communication unit.

[0167] The backhaul communication unit 1k-30 may provide an interface for communicating with other nodes in the network. That is, the backhaul communication unit 1k-30 converts the bit string sent from the master base station to other nodes (e.g., secondary base stations, core networks, etc.) into a physical signal, and converts the physical signal received from other nodes into a bit string.

[0168] The memory 1k-40 may store basic programs, applications, and data for the operation of the master base station, such as configuration information. Specifically, the memory 1k-40 may store information about the bearers assigned to the connected UEs, measurement results reported from the connected UEs, and the like. In addition, the memory 1k-40 may store information used as a reference to determine whether to provide multiple connections to the UE or to suspend multiple connections. In addition, the memory 1k-40 may provide stored data at the request of the controller 1k-50.

[0169] The controller 1k-50 controls the overall operation of the master base station. For example, the controller 1k-50 transmits / receives signals through the baseband processor 1k-20 and the RF processor 1k-10 or through the backhaul communication unit 1k-30. In addition, the controller 1k-50 records data in the memory 1k-40 and reads data from the memory 1k-40. To this end, the controller 1k-50 may include at least one processor.

[0170] When the method is implemented via software, a computer-readable storage medium storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium may be configured to be executed by one or more processors within an electronic device. At least one program includes instructions that cause the electronic device to perform the method according to the various embodiments of the present disclosure as defined in the appended claims and / or disclosed herein.

[0171] These programs (software modules or software) can be stored in non-volatile memory, including random access memory and flash memory, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic disk storage devices, compact disk-ROM (CD-ROM), digital versatile disk (DVD) or other types of optical storage devices or magnetic tape cassettes. Alternatively, any combination of some or all of them can form the memory in which the program is stored. In addition, multiple such memories may be included in the electronic device.

[0172] In addition, the program can be stored in an attachable storage device that can be accessed by the electronic device via a communication network such as the Internet, an intranet, a local area network (LAN), a wide area LAN (WLAN), and a storage area network (SAN), or a combination thereof. Such a storage device can access the electronic device via an external port. In addition, a separate storage device on a communication network can access the portable electronic device.

[0173] In the above detailed embodiments of the present disclosure, the elements included in the present disclosure are expressed in the singular or plural, depending on the detailed embodiment presented. However, for ease of description, the singular form or plural form is appropriately selected for the situation presented, and the present disclosure is not limited to elements expressed in the singular or plural. Therefore, an element expressed in the plural may also include a single element, or an element expressed in the singular may also include multiple elements.

[0174] Although specific embodiments have been described in the detailed description of the present disclosure, it is apparent that various modifications and changes can be made thereto without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the embodiments set forth herein, but should be defined by the appended claims and their equivalents.

[0175] The embodiments of the present disclosure described and shown in the specification and the drawings are merely specific examples presented to easily explain the technical content of the embodiments of the present disclosure and to help understand the embodiments of the present disclosure, and are not intended to limit the scope of the embodiments of the present disclosure. It is obvious to those skilled in the art that, in addition to the embodiments described herein, other variations based on the technical concepts of the present disclosure may also be implemented.

Claims

1. A method performed by a terminal supporting a Multi-Universal Subscriber Identity Module (MUSIM) in a wireless communication system, the method comprising: receiving a configuration from a first network associated with the first SIM to send MUSIM-related UE assistance information; identifying a frequency band affected by a second network associated with the second SIM; and A UE assistance information message including information about a frequency band affected by a second network is sent to a first network associated with the first SIM.

2. The method according to claim 1, wherein The information about frequency bands includes a list of frequency bands affected by the second network.

3. The method according to claim 1, wherein The receiving configuration to send MUSIM-related UE assistance information includes receiving a radio resource control (RRC) message including an inhibit timer for MUSIM operation, and The prohibition timer for MUSIM operation is related to the limitation of terminal capabilities.

4. The method according to claim 1, wherein The terminal is in a radio resource control (RRC)-connected state with a first network and a second network, wherein the first network and the second network are New Radio (NR) or Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA), and The first SIM and the second SIM are different.

5. A method performed by a first network associated with a first SIM in a wireless communication system, the method comprising: performing configuration to send MUSIM-related UE assistance information to a terminal supporting a Multiple Universal Subscriber Identity Module (MUSIM); and A UE assistance information message including information about a frequency band affected by a second network associated with a second SIM is received from the terminal.

6. The method according to claim 4, wherein: The information on frequency bands affected by the second network associated with the second SIM includes a list of frequency bands affected by the second network.

7. The method according to claim 4, wherein: The performing configuration to transmit MUSIM-related UE assistance information includes transmitting a radio resource control (RRC) message including a prohibit timer for MUSIM operation, and The prohibition timer for MUSIM operation is related to the limitation of terminal capabilities.

8. The method according to claim 5, wherein The terminal is in a radio resource control (RRC)-connected state with a first network and a second network, wherein the first network and the second network are New Radio (NR) or Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA), and The first SIM and the second SIM are different.

9. A terminal supporting a Multiple Universal Subscriber Identity Module (MUSIM) in a wireless communication system, the terminal comprising: a transceiver configured to transmit and receive signals; and controller, Wherein, the controller is configured as follows: sending MUSIM-related UE assistance information from a first network associated with the first SIM; identifying a frequency band affected by a second network associated with the second SIM; and A UE assistance information message including information about a frequency band affected by a second network is sent to a first network associated with the first SIM.

10. The terminal according to claim 9, wherein: The information about frequency bands includes a list of frequency bands affected by the second network. The terminal according to claim 9 , wherein: The controller is configured to receive a radio resource control (RRC) message including an inhibit timer for MUSIM operation, and The prohibition timer for MUSIM operation is related to the limitation of terminal capabilities.

12. The terminal according to claim 9, wherein: The terminal is in a radio resource control (RRC)-connected state with a first network and a second network, wherein the first network and the second network are New Radio (NR) or Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA), and The first SIM and the second SIM are different.

13. A first network associated with a first SIM in a wireless communication system, the first network comprising: a transceiver configured to transmit and receive signals; and controller, Wherein, the controller is configured as follows: performing configuration to send MUSIM-related UE assistance information to a terminal supporting a Multiple Universal Subscriber Identity Module (MUSIM); and A UE assistance information message including information about a frequency band affected by a second network associated with a second SIM is received from the terminal.

14. The first network according to claim 13, wherein: The information on frequency bands affected by the second network associated with the second SIM includes a list of frequency bands affected by the second network.

15. The first network according to claim 13, wherein: The controller is configured to send a radio resource control (RRC) message including an inhibit timer for MUSIM operation, The prohibition timer for MUSIM operation is related to the limitation of terminal capabilities. The terminal is in a radio resource control (RRC)-connected state with the first network and the second network. wherein the first network and the second network are New Radio (NR) or Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (E-UTRA), and The first SIM and the second SIM are different.

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